+++ /dev/null
-// crypto/x509 add sm2 support
-package sm2
-
-import (
- "bytes"
- "crypto"
- "crypto/dsa"
- "crypto/ecdsa"
- "crypto/elliptic"
- "crypto/md5"
- "crypto/rand"
- "crypto/rsa"
- "crypto/sha1"
- "crypto/sha256"
- "crypto/sha512"
- "crypto/x509/pkix"
- "encoding/asn1"
- "encoding/pem"
- "errors"
- "fmt"
- "hash"
- "io"
- "io/ioutil"
- "math/big"
- "net"
- "os"
- "strconv"
- "time"
-
- "golang.org/x/crypto/ripemd160"
- "golang.org/x/crypto/sha3"
-
- "github.com/vapor/crypto/sm3"
-)
-
-// pkixPublicKey reflects a PKIX public key structure. See SubjectPublicKeyInfo
-// in RFC 3280.
-type pkixPublicKey struct {
- Algo pkix.AlgorithmIdentifier
- BitString asn1.BitString
-}
-
-// ParsePKIXPublicKey parses a DER encoded public key. These values are
-// typically found in PEM blocks with "BEGIN PUBLIC KEY".
-//
-// Supported key types include RSA, DSA, and ECDSA. Unknown key
-// types result in an error.
-//
-// On success, pub will be of type *rsa.PublicKey, *dsa.PublicKey,
-// or *ecdsa.PublicKey.
-func ParsePKIXPublicKey(derBytes []byte) (pub interface{}, err error) {
- var pki publicKeyInfo
-
- if rest, err := asn1.Unmarshal(derBytes, &pki); err != nil {
- return nil, err
- } else if len(rest) != 0 {
- return nil, errors.New("x509: trailing data after ASN.1 of public-key")
- }
- algo := getPublicKeyAlgorithmFromOID(pki.Algorithm.Algorithm)
- if algo == UnknownPublicKeyAlgorithm {
- return nil, errors.New("x509: unknown public key algorithm")
- }
- return parsePublicKey(algo, &pki)
-}
-
-func marshalPublicKey(pub interface{}) (publicKeyBytes []byte, publicKeyAlgorithm pkix.AlgorithmIdentifier, err error) {
- switch pub := pub.(type) {
- case *rsa.PublicKey:
- publicKeyBytes, err = asn1.Marshal(rsaPublicKey{
- N: pub.N,
- E: pub.E,
- })
- if err != nil {
- return nil, pkix.AlgorithmIdentifier{}, err
- }
- publicKeyAlgorithm.Algorithm = oidPublicKeyRSA
- // This is a NULL parameters value which is required by
- // https://tools.ietf.org/html/rfc3279#section-2.3.1.
- publicKeyAlgorithm.Parameters = asn1.RawValue{
- Tag: 5,
- }
- case *ecdsa.PublicKey:
- publicKeyBytes = elliptic.Marshal(pub.Curve, pub.X, pub.Y)
- oid, ok := oidFromNamedCurve(pub.Curve)
- if !ok {
- return nil, pkix.AlgorithmIdentifier{}, errors.New("x509: unsupported elliptic curve")
- }
- publicKeyAlgorithm.Algorithm = oidPublicKeyECDSA
- var paramBytes []byte
- paramBytes, err = asn1.Marshal(oid)
- if err != nil {
- return
- }
- publicKeyAlgorithm.Parameters.FullBytes = paramBytes
- case *PublicKey:
- publicKeyBytes = elliptic.Marshal(pub.Curve, pub.X, pub.Y)
- oid, ok := oidFromNamedCurve(pub.Curve)
- if !ok {
- return nil, pkix.AlgorithmIdentifier{}, errors.New("x509: unsupported SM2 curve")
- }
- publicKeyAlgorithm.Algorithm = oidPublicKeyECDSA
- var paramBytes []byte
- paramBytes, err = asn1.Marshal(oid)
- if err != nil {
- return
- }
- publicKeyAlgorithm.Parameters.FullBytes = paramBytes
- default:
- return nil, pkix.AlgorithmIdentifier{}, errors.New("x509: only RSA and ECDSA(SM2) public keys supported")
- }
-
- return publicKeyBytes, publicKeyAlgorithm, nil
-}
-
-// MarshalPKIXPublicKey serialises a public key to DER-encoded PKIX format.
-func MarshalPKIXPublicKey(pub interface{}) ([]byte, error) {
- var publicKeyBytes []byte
- var publicKeyAlgorithm pkix.AlgorithmIdentifier
- var err error
-
- if publicKeyBytes, publicKeyAlgorithm, err = marshalPublicKey(pub); err != nil {
- return nil, err
- }
-
- pkix := pkixPublicKey{
- Algo: publicKeyAlgorithm,
- BitString: asn1.BitString{
- Bytes: publicKeyBytes,
- BitLength: 8 * len(publicKeyBytes),
- },
- }
-
- ret, _ := asn1.Marshal(pkix)
- return ret, nil
-}
-
-// These structures reflect the ASN.1 structure of X.509 certificates.:
-
-type certificate struct {
- Raw asn1.RawContent
- TBSCertificate tbsCertificate
- SignatureAlgorithm pkix.AlgorithmIdentifier
- SignatureValue asn1.BitString
-}
-
-type tbsCertificate struct {
- Raw asn1.RawContent
- Version int `asn1:"optional,explicit,default:0,tag:0"`
- SerialNumber *big.Int
- SignatureAlgorithm pkix.AlgorithmIdentifier
- Issuer asn1.RawValue
- Validity validity
- Subject asn1.RawValue
- PublicKey publicKeyInfo
- UniqueId asn1.BitString `asn1:"optional,tag:1"`
- SubjectUniqueId asn1.BitString `asn1:"optional,tag:2"`
- Extensions []pkix.Extension `asn1:"optional,explicit,tag:3"`
-}
-
-type dsaAlgorithmParameters struct {
- P, Q, G *big.Int
-}
-
-type dsaSignature struct {
- R, S *big.Int
-}
-
-type ecdsaSignature dsaSignature
-
-type validity struct {
- NotBefore, NotAfter time.Time
-}
-
-type publicKeyInfo struct {
- Raw asn1.RawContent
- Algorithm pkix.AlgorithmIdentifier
- PublicKey asn1.BitString
-}
-
-// RFC 5280, 4.2.1.1
-type authKeyId struct {
- Id []byte `asn1:"optional,tag:0"`
-}
-
-type SignatureAlgorithm int
-
-type Hash uint
-
-func init() {
- RegisterHash(MD4, nil)
- RegisterHash(MD5, md5.New)
- RegisterHash(SHA1, sha1.New)
- RegisterHash(SHA224, sha256.New224)
- RegisterHash(SHA256, sha256.New)
- RegisterHash(SHA384, sha512.New384)
- RegisterHash(SHA512, sha512.New)
- RegisterHash(MD5SHA1, nil)
- RegisterHash(RIPEMD160, ripemd160.New)
- RegisterHash(SHA3_224, sha3.New224)
- RegisterHash(SHA3_256, sha3.New256)
- RegisterHash(SHA3_384, sha3.New384)
- RegisterHash(SHA3_512, sha3.New512)
- RegisterHash(SHA512_224, sha512.New512_224)
- RegisterHash(SHA512_256, sha512.New512_256)
- RegisterHash(SM3, sm3.New)
-}
-
-// HashFunc simply returns the value of h so that Hash implements SignerOpts.
-func (h Hash) HashFunc() crypto.Hash {
- return crypto.Hash(h)
-}
-
-const (
- MD4 Hash = 1 + iota // import golang.org/x/crypto/md4
- MD5 // import crypto/md5
- SHA1 // import crypto/sha1
- SHA224 // import crypto/sha256
- SHA256 // import crypto/sha256
- SHA384 // import crypto/sha512
- SHA512 // import crypto/sha512
- MD5SHA1 // no implementation; MD5+SHA1 used for TLS RSA
- RIPEMD160 // import golang.org/x/crypto/ripemd160
- SHA3_224 // import golang.org/x/crypto/sha3
- SHA3_256 // import golang.org/x/crypto/sha3
- SHA3_384 // import golang.org/x/crypto/sha3
- SHA3_512 // import golang.org/x/crypto/sha3
- SHA512_224 // import crypto/sha512
- SHA512_256 // import crypto/sha512
- SM3
- maxHash
-)
-
-var digestSizes = []uint8{
- MD4: 16,
- MD5: 16,
- SHA1: 20,
- SHA224: 28,
- SHA256: 32,
- SHA384: 48,
- SHA512: 64,
- SHA512_224: 28,
- SHA512_256: 32,
- SHA3_224: 28,
- SHA3_256: 32,
- SHA3_384: 48,
- SHA3_512: 64,
- MD5SHA1: 36,
- RIPEMD160: 20,
- SM3: 32,
-}
-
-// Size returns the length, in bytes, of a digest resulting from the given hash
-// function. It doesn't require that the hash function in question be linked
-// into the program.
-func (h Hash) Size() int {
- if h > 0 && h < maxHash {
- return int(digestSizes[h])
- }
- panic("crypto: Size of unknown hash function")
-}
-
-var hashes = make([]func() hash.Hash, maxHash)
-
-// New returns a new hash.Hash calculating the given hash function. New panics
-// if the hash function is not linked into the binary.
-func (h Hash) New() hash.Hash {
- if h > 0 && h < maxHash {
- f := hashes[h]
- if f != nil {
- return f()
- }
- }
- panic("crypto: requested hash function #" + strconv.Itoa(int(h)) + " is unavailable")
-}
-
-// Available reports whether the given hash function is linked into the binary.
-func (h Hash) Available() bool {
- return h < maxHash && hashes[h] != nil
-}
-
-// RegisterHash registers a function that returns a new instance of the given
-// hash function. This is intended to be called from the init function in
-// packages that implement hash functions.
-func RegisterHash(h Hash, f func() hash.Hash) {
- if h >= maxHash {
- panic("crypto: RegisterHash of unknown hash function")
- }
- hashes[h] = f
-}
-
-const (
- UnknownSignatureAlgorithm SignatureAlgorithm = iota
- MD2WithRSA
- MD5WithRSA
- // SM3WithRSA reserve
- SHA1WithRSA
- SHA256WithRSA
- SHA384WithRSA
- SHA512WithRSA
- DSAWithSHA1
- DSAWithSHA256
- ECDSAWithSHA1
- ECDSAWithSHA256
- ECDSAWithSHA384
- ECDSAWithSHA512
- SHA256WithRSAPSS
- SHA384WithRSAPSS
- SHA512WithRSAPSS
- SM2WithSM3
- SM2WithSHA1
- SM2WithSHA256
-)
-
-func (algo SignatureAlgorithm) isRSAPSS() bool {
- switch algo {
- case SHA256WithRSAPSS, SHA384WithRSAPSS, SHA512WithRSAPSS:
- return true
- default:
- return false
- }
-}
-
-var algoName = [...]string{
- MD2WithRSA: "MD2-RSA",
- MD5WithRSA: "MD5-RSA",
- SHA1WithRSA: "SHA1-RSA",
- // SM3WithRSA: "SM3-RSA", reserve
- SHA256WithRSA: "SHA256-RSA",
- SHA384WithRSA: "SHA384-RSA",
- SHA512WithRSA: "SHA512-RSA",
- SHA256WithRSAPSS: "SHA256-RSAPSS",
- SHA384WithRSAPSS: "SHA384-RSAPSS",
- SHA512WithRSAPSS: "SHA512-RSAPSS",
- DSAWithSHA1: "DSA-SHA1",
- DSAWithSHA256: "DSA-SHA256",
- ECDSAWithSHA1: "ECDSA-SHA1",
- ECDSAWithSHA256: "ECDSA-SHA256",
- ECDSAWithSHA384: "ECDSA-SHA384",
- ECDSAWithSHA512: "ECDSA-SHA512",
- SM2WithSM3: "SM2-SM3",
- SM2WithSHA1: "SM2-SHA1",
- SM2WithSHA256: "SM2-SHA256",
-}
-
-func (algo SignatureAlgorithm) String() string {
- if 0 < algo && int(algo) < len(algoName) {
- return algoName[algo]
- }
- return strconv.Itoa(int(algo))
-}
-
-type PublicKeyAlgorithm int
-
-const (
- UnknownPublicKeyAlgorithm PublicKeyAlgorithm = iota
- RSA
- DSA
- ECDSA
-)
-
-// OIDs for signature algorithms
-//
-// pkcs-1 OBJECT IDENTIFIER ::= {
-// iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) 1 }
-//
-//
-// RFC 3279 2.2.1 RSA Signature Algorithms
-//
-// md2WithRSAEncryption OBJECT IDENTIFIER ::= { pkcs-1 2 }
-//
-// md5WithRSAEncryption OBJECT IDENTIFIER ::= { pkcs-1 4 }
-//
-// sha-1WithRSAEncryption OBJECT IDENTIFIER ::= { pkcs-1 5 }
-//
-// dsaWithSha1 OBJECT IDENTIFIER ::= {
-// iso(1) member-body(2) us(840) x9-57(10040) x9cm(4) 3 }
-//
-// RFC 3279 2.2.3 ECDSA Signature Algorithm
-//
-// ecdsa-with-SHA1 OBJECT IDENTIFIER ::= {
-// iso(1) member-body(2) us(840) ansi-x962(10045)
-// signatures(4) ecdsa-with-SHA1(1)}
-//
-//
-// RFC 4055 5 PKCS #1 Version 1.5
-//
-// sha256WithRSAEncryption OBJECT IDENTIFIER ::= { pkcs-1 11 }
-//
-// sha384WithRSAEncryption OBJECT IDENTIFIER ::= { pkcs-1 12 }
-//
-// sha512WithRSAEncryption OBJECT IDENTIFIER ::= { pkcs-1 13 }
-//
-//
-// RFC 5758 3.1 DSA Signature Algorithms
-//
-// dsaWithSha256 OBJECT IDENTIFIER ::= {
-// joint-iso-ccitt(2) country(16) us(840) organization(1) gov(101)
-// csor(3) algorithms(4) id-dsa-with-sha2(3) 2}
-//
-// RFC 5758 3.2 ECDSA Signature Algorithm
-//
-// ecdsa-with-SHA256 OBJECT IDENTIFIER ::= { iso(1) member-body(2)
-// us(840) ansi-X9-62(10045) signatures(4) ecdsa-with-SHA2(3) 2 }
-//
-// ecdsa-with-SHA384 OBJECT IDENTIFIER ::= { iso(1) member-body(2)
-// us(840) ansi-X9-62(10045) signatures(4) ecdsa-with-SHA2(3) 3 }
-//
-// ecdsa-with-SHA512 OBJECT IDENTIFIER ::= { iso(1) member-body(2)
-// us(840) ansi-X9-62(10045) signatures(4) ecdsa-with-SHA2(3) 4 }
-
-var (
- oidSignatureMD2WithRSA = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 2}
- oidSignatureMD5WithRSA = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 4}
- oidSignatureSHA1WithRSA = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 5}
- oidSignatureSHA256WithRSA = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 11}
- oidSignatureSHA384WithRSA = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 12}
- oidSignatureSHA512WithRSA = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 13}
- oidSignatureRSAPSS = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 10}
- oidSignatureDSAWithSHA1 = asn1.ObjectIdentifier{1, 2, 840, 10040, 4, 3}
- oidSignatureDSAWithSHA256 = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 3, 2}
- oidSignatureECDSAWithSHA1 = asn1.ObjectIdentifier{1, 2, 840, 10045, 4, 1}
- oidSignatureECDSAWithSHA256 = asn1.ObjectIdentifier{1, 2, 840, 10045, 4, 3, 2}
- oidSignatureECDSAWithSHA384 = asn1.ObjectIdentifier{1, 2, 840, 10045, 4, 3, 3}
- oidSignatureECDSAWithSHA512 = asn1.ObjectIdentifier{1, 2, 840, 10045, 4, 3, 4}
- oidSignatureSM2WithSM3 = asn1.ObjectIdentifier{1, 2, 156, 10197, 1, 501}
- oidSignatureSM2WithSHA1 = asn1.ObjectIdentifier{1, 2, 156, 10197, 1, 502}
- oidSignatureSM2WithSHA256 = asn1.ObjectIdentifier{1, 2, 156, 10197, 1, 503}
- // oidSignatureSM3WithRSA = asn1.ObjectIdentifier{1, 2, 156, 10197, 1, 504}
-
- oidSM3 = asn1.ObjectIdentifier{1, 2, 156, 10197, 1, 401, 1}
- oidSHA256 = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 2, 1}
- oidSHA384 = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 2, 2}
- oidSHA512 = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 2, 3}
-
- oidMGF1 = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 8}
-
- // oidISOSignatureSHA1WithRSA means the same as oidSignatureSHA1WithRSA
- // but it's specified by ISO. Microsoft's makecert.exe has been known
- // to produce certificates with this OID.
- oidISOSignatureSHA1WithRSA = asn1.ObjectIdentifier{1, 3, 14, 3, 2, 29}
-)
-
-var signatureAlgorithmDetails = []struct {
- algo SignatureAlgorithm
- oid asn1.ObjectIdentifier
- pubKeyAlgo PublicKeyAlgorithm
- hash Hash
-}{
- {MD2WithRSA, oidSignatureMD2WithRSA, RSA, Hash(0) /* no value for MD2 */},
- {MD5WithRSA, oidSignatureMD5WithRSA, RSA, MD5},
- {SHA1WithRSA, oidSignatureSHA1WithRSA, RSA, SHA1},
- {SHA1WithRSA, oidISOSignatureSHA1WithRSA, RSA, SHA1},
- {SHA256WithRSA, oidSignatureSHA256WithRSA, RSA, SHA256},
- {SHA384WithRSA, oidSignatureSHA384WithRSA, RSA, SHA384},
- {SHA512WithRSA, oidSignatureSHA512WithRSA, RSA, SHA512},
- {SHA256WithRSAPSS, oidSignatureRSAPSS, RSA, SHA256},
- {SHA384WithRSAPSS, oidSignatureRSAPSS, RSA, SHA384},
- {SHA512WithRSAPSS, oidSignatureRSAPSS, RSA, SHA512},
- {DSAWithSHA1, oidSignatureDSAWithSHA1, DSA, SHA1},
- {DSAWithSHA256, oidSignatureDSAWithSHA256, DSA, SHA256},
- {ECDSAWithSHA1, oidSignatureECDSAWithSHA1, ECDSA, SHA1},
- {ECDSAWithSHA256, oidSignatureECDSAWithSHA256, ECDSA, SHA256},
- {ECDSAWithSHA384, oidSignatureECDSAWithSHA384, ECDSA, SHA384},
- {ECDSAWithSHA512, oidSignatureECDSAWithSHA512, ECDSA, SHA512},
- {SM2WithSM3, oidSignatureSM2WithSM3, ECDSA, SM3},
- {SM2WithSHA1, oidSignatureSM2WithSHA1, ECDSA, SHA1},
- {SM2WithSHA256, oidSignatureSM2WithSHA256, ECDSA, SHA256},
- // {SM3WithRSA, oidSignatureSM3WithRSA, RSA, SM3},
-}
-
-// pssParameters reflects the parameters in an AlgorithmIdentifier that
-// specifies RSA PSS. See https://tools.ietf.org/html/rfc3447#appendix-A.2.3
-type pssParameters struct {
- // The following three fields are not marked as
- // optional because the default values specify SHA-1,
- // which is no longer suitable for use in signatures.
- Hash pkix.AlgorithmIdentifier `asn1:"explicit,tag:0"`
- MGF pkix.AlgorithmIdentifier `asn1:"explicit,tag:1"`
- SaltLength int `asn1:"explicit,tag:2"`
- TrailerField int `asn1:"optional,explicit,tag:3,default:1"`
-}
-
-// rsaPSSParameters returns an asn1.RawValue suitable for use as the Parameters
-// in an AlgorithmIdentifier that specifies RSA PSS.
-func rsaPSSParameters(hashFunc Hash) asn1.RawValue {
- var hashOID asn1.ObjectIdentifier
-
- switch hashFunc {
- case SHA256:
- hashOID = oidSHA256
- case SHA384:
- hashOID = oidSHA384
- case SHA512:
- hashOID = oidSHA512
- }
-
- params := pssParameters{
- Hash: pkix.AlgorithmIdentifier{
- Algorithm: hashOID,
- Parameters: asn1.RawValue{
- Tag: 5, /* ASN.1 NULL */
- },
- },
- MGF: pkix.AlgorithmIdentifier{
- Algorithm: oidMGF1,
- },
- SaltLength: hashFunc.Size(),
- TrailerField: 1,
- }
-
- mgf1Params := pkix.AlgorithmIdentifier{
- Algorithm: hashOID,
- Parameters: asn1.RawValue{
- Tag: 5, /* ASN.1 NULL */
- },
- }
-
- var err error
- params.MGF.Parameters.FullBytes, err = asn1.Marshal(mgf1Params)
- if err != nil {
- panic(err)
- }
-
- serialized, err := asn1.Marshal(params)
- if err != nil {
- panic(err)
- }
-
- return asn1.RawValue{FullBytes: serialized}
-}
-
-func getSignatureAlgorithmFromAI(ai pkix.AlgorithmIdentifier) SignatureAlgorithm {
- if !ai.Algorithm.Equal(oidSignatureRSAPSS) {
- for _, details := range signatureAlgorithmDetails {
- if ai.Algorithm.Equal(details.oid) {
- return details.algo
- }
- }
- return UnknownSignatureAlgorithm
- }
-
- // RSA PSS is special because it encodes important parameters
- // in the Parameters.
-
- var params pssParameters
- if _, err := asn1.Unmarshal(ai.Parameters.FullBytes, ¶ms); err != nil {
- return UnknownSignatureAlgorithm
- }
-
- var mgf1HashFunc pkix.AlgorithmIdentifier
- if _, err := asn1.Unmarshal(params.MGF.Parameters.FullBytes, &mgf1HashFunc); err != nil {
- return UnknownSignatureAlgorithm
- }
-
- // PSS is greatly overburdened with options. This code forces
- // them into three buckets by requiring that the MGF1 hash
- // function always match the message hash function (as
- // recommended in
- // https://tools.ietf.org/html/rfc3447#section-8.1), that the
- // salt length matches the hash length, and that the trailer
- // field has the default value.
- asn1NULL := []byte{0x05, 0x00}
- if !bytes.Equal(params.Hash.Parameters.FullBytes, asn1NULL) ||
- !params.MGF.Algorithm.Equal(oidMGF1) ||
- !mgf1HashFunc.Algorithm.Equal(params.Hash.Algorithm) ||
- !bytes.Equal(mgf1HashFunc.Parameters.FullBytes, asn1NULL) ||
- params.TrailerField != 1 {
- return UnknownSignatureAlgorithm
- }
-
- switch {
- case params.Hash.Algorithm.Equal(oidSHA256) && params.SaltLength == 32:
- return SHA256WithRSAPSS
- case params.Hash.Algorithm.Equal(oidSHA384) && params.SaltLength == 48:
- return SHA384WithRSAPSS
- case params.Hash.Algorithm.Equal(oidSHA512) && params.SaltLength == 64:
- return SHA512WithRSAPSS
- }
-
- return UnknownSignatureAlgorithm
-}
-
-// RFC 3279, 2.3 Public Key Algorithms
-//
-// pkcs-1 OBJECT IDENTIFIER ::== { iso(1) member-body(2) us(840)
-// rsadsi(113549) pkcs(1) 1 }
-//
-// rsaEncryption OBJECT IDENTIFIER ::== { pkcs1-1 1 }
-//
-// id-dsa OBJECT IDENTIFIER ::== { iso(1) member-body(2) us(840)
-// x9-57(10040) x9cm(4) 1 }
-//
-// RFC 5480, 2.1.1 Unrestricted Algorithm Identifier and Parameters
-//
-// id-ecPublicKey OBJECT IDENTIFIER ::= {
-// iso(1) member-body(2) us(840) ansi-X9-62(10045) keyType(2) 1 }
-var (
- oidPublicKeyRSA = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 1}
- oidPublicKeyDSA = asn1.ObjectIdentifier{1, 2, 840, 10040, 4, 1}
- oidPublicKeyECDSA = asn1.ObjectIdentifier{1, 2, 840, 10045, 2, 1}
-)
-
-func getPublicKeyAlgorithmFromOID(oid asn1.ObjectIdentifier) PublicKeyAlgorithm {
- switch {
- case oid.Equal(oidPublicKeyRSA):
- return RSA
- case oid.Equal(oidPublicKeyDSA):
- return DSA
- case oid.Equal(oidPublicKeyECDSA):
- return ECDSA
- }
- return UnknownPublicKeyAlgorithm
-}
-
-// RFC 5480, 2.1.1.1. Named Curve
-//
-// secp224r1 OBJECT IDENTIFIER ::= {
-// iso(1) identified-organization(3) certicom(132) curve(0) 33 }
-//
-// secp256r1 OBJECT IDENTIFIER ::= {
-// iso(1) member-body(2) us(840) ansi-X9-62(10045) curves(3)
-// prime(1) 7 }
-//
-// secp384r1 OBJECT IDENTIFIER ::= {
-// iso(1) identified-organization(3) certicom(132) curve(0) 34 }
-//
-// secp521r1 OBJECT IDENTIFIER ::= {
-// iso(1) identified-organization(3) certicom(132) curve(0) 35 }
-//
-// NB: secp256r1 is equivalent to prime256v1
-var (
- oidNamedCurveP224 = asn1.ObjectIdentifier{1, 3, 132, 0, 33}
- oidNamedCurveP256 = asn1.ObjectIdentifier{1, 2, 840, 10045, 3, 1, 7}
- oidNamedCurveP384 = asn1.ObjectIdentifier{1, 3, 132, 0, 34}
- oidNamedCurveP521 = asn1.ObjectIdentifier{1, 3, 132, 0, 35}
- oidNamedCurveP256SM2 = asn1.ObjectIdentifier{1, 2, 156, 10197, 1, 301} // I get the SM2 ID through parsing the pem file generated by gmssl
-)
-
-func namedCurveFromOID(oid asn1.ObjectIdentifier) elliptic.Curve {
- switch {
- case oid.Equal(oidNamedCurveP224):
- return elliptic.P224()
- case oid.Equal(oidNamedCurveP256):
- return elliptic.P256()
- case oid.Equal(oidNamedCurveP384):
- return elliptic.P384()
- case oid.Equal(oidNamedCurveP521):
- return elliptic.P521()
- case oid.Equal(oidNamedCurveP256SM2):
- return P256Sm2()
- }
- return nil
-}
-
-func oidFromNamedCurve(curve elliptic.Curve) (asn1.ObjectIdentifier, bool) {
- switch curve {
- case elliptic.P224():
- return oidNamedCurveP224, true
- case elliptic.P256():
- return oidNamedCurveP256, true
- case elliptic.P384():
- return oidNamedCurveP384, true
- case elliptic.P521():
- return oidNamedCurveP521, true
- case P256Sm2():
- return oidNamedCurveP256SM2, true
- }
- return nil, false
-}
-
-// KeyUsage represents the set of actions that are valid for a given key. It's
-// a bitmap of the KeyUsage* constants.
-type KeyUsage int
-
-const (
- KeyUsageDigitalSignature KeyUsage = 1 << iota
- KeyUsageContentCommitment
- KeyUsageKeyEncipherment
- KeyUsageDataEncipherment
- KeyUsageKeyAgreement
- KeyUsageCertSign
- KeyUsageCRLSign
- KeyUsageEncipherOnly
- KeyUsageDecipherOnly
-)
-
-// RFC 5280, 4.2.1.12 Extended Key Usage
-//
-// anyExtendedKeyUsage OBJECT IDENTIFIER ::= { id-ce-extKeyUsage 0 }
-//
-// id-kp OBJECT IDENTIFIER ::= { id-pkix 3 }
-//
-// id-kp-serverAuth OBJECT IDENTIFIER ::= { id-kp 1 }
-// id-kp-clientAuth OBJECT IDENTIFIER ::= { id-kp 2 }
-// id-kp-codeSigning OBJECT IDENTIFIER ::= { id-kp 3 }
-// id-kp-emailProtection OBJECT IDENTIFIER ::= { id-kp 4 }
-// id-kp-timeStamping OBJECT IDENTIFIER ::= { id-kp 8 }
-// id-kp-OCSPSigning OBJECT IDENTIFIER ::= { id-kp 9 }
-var (
- oidExtKeyUsageAny = asn1.ObjectIdentifier{2, 5, 29, 37, 0}
- oidExtKeyUsageServerAuth = asn1.ObjectIdentifier{1, 3, 6, 1, 5, 5, 7, 3, 1}
- oidExtKeyUsageClientAuth = asn1.ObjectIdentifier{1, 3, 6, 1, 5, 5, 7, 3, 2}
- oidExtKeyUsageCodeSigning = asn1.ObjectIdentifier{1, 3, 6, 1, 5, 5, 7, 3, 3}
- oidExtKeyUsageEmailProtection = asn1.ObjectIdentifier{1, 3, 6, 1, 5, 5, 7, 3, 4}
- oidExtKeyUsageIPSECEndSystem = asn1.ObjectIdentifier{1, 3, 6, 1, 5, 5, 7, 3, 5}
- oidExtKeyUsageIPSECTunnel = asn1.ObjectIdentifier{1, 3, 6, 1, 5, 5, 7, 3, 6}
- oidExtKeyUsageIPSECUser = asn1.ObjectIdentifier{1, 3, 6, 1, 5, 5, 7, 3, 7}
- oidExtKeyUsageTimeStamping = asn1.ObjectIdentifier{1, 3, 6, 1, 5, 5, 7, 3, 8}
- oidExtKeyUsageOCSPSigning = asn1.ObjectIdentifier{1, 3, 6, 1, 5, 5, 7, 3, 9}
- oidExtKeyUsageMicrosoftServerGatedCrypto = asn1.ObjectIdentifier{1, 3, 6, 1, 4, 1, 311, 10, 3, 3}
- oidExtKeyUsageNetscapeServerGatedCrypto = asn1.ObjectIdentifier{2, 16, 840, 1, 113730, 4, 1}
-)
-
-// ExtKeyUsage represents an extended set of actions that are valid for a given key.
-// Each of the ExtKeyUsage* constants define a unique action.
-type ExtKeyUsage int
-
-const (
- ExtKeyUsageAny ExtKeyUsage = iota
- ExtKeyUsageServerAuth
- ExtKeyUsageClientAuth
- ExtKeyUsageCodeSigning
- ExtKeyUsageEmailProtection
- ExtKeyUsageIPSECEndSystem
- ExtKeyUsageIPSECTunnel
- ExtKeyUsageIPSECUser
- ExtKeyUsageTimeStamping
- ExtKeyUsageOCSPSigning
- ExtKeyUsageMicrosoftServerGatedCrypto
- ExtKeyUsageNetscapeServerGatedCrypto
-)
-
-// extKeyUsageOIDs contains the mapping between an ExtKeyUsage and its OID.
-var extKeyUsageOIDs = []struct {
- extKeyUsage ExtKeyUsage
- oid asn1.ObjectIdentifier
-}{
- {ExtKeyUsageAny, oidExtKeyUsageAny},
- {ExtKeyUsageServerAuth, oidExtKeyUsageServerAuth},
- {ExtKeyUsageClientAuth, oidExtKeyUsageClientAuth},
- {ExtKeyUsageCodeSigning, oidExtKeyUsageCodeSigning},
- {ExtKeyUsageEmailProtection, oidExtKeyUsageEmailProtection},
- {ExtKeyUsageIPSECEndSystem, oidExtKeyUsageIPSECEndSystem},
- {ExtKeyUsageIPSECTunnel, oidExtKeyUsageIPSECTunnel},
- {ExtKeyUsageIPSECUser, oidExtKeyUsageIPSECUser},
- {ExtKeyUsageTimeStamping, oidExtKeyUsageTimeStamping},
- {ExtKeyUsageOCSPSigning, oidExtKeyUsageOCSPSigning},
- {ExtKeyUsageMicrosoftServerGatedCrypto, oidExtKeyUsageMicrosoftServerGatedCrypto},
- {ExtKeyUsageNetscapeServerGatedCrypto, oidExtKeyUsageNetscapeServerGatedCrypto},
-}
-
-func extKeyUsageFromOID(oid asn1.ObjectIdentifier) (eku ExtKeyUsage, ok bool) {
- for _, pair := range extKeyUsageOIDs {
- if oid.Equal(pair.oid) {
- return pair.extKeyUsage, true
- }
- }
- return
-}
-
-func oidFromExtKeyUsage(eku ExtKeyUsage) (oid asn1.ObjectIdentifier, ok bool) {
- for _, pair := range extKeyUsageOIDs {
- if eku == pair.extKeyUsage {
- return pair.oid, true
- }
- }
- return
-}
-
-// A Certificate represents an X.509 certificate.
-type Certificate struct {
- Raw []byte // Complete ASN.1 DER content (certificate, signature algorithm and signature).
- RawTBSCertificate []byte // Certificate part of raw ASN.1 DER content.
- RawSubjectPublicKeyInfo []byte // DER encoded SubjectPublicKeyInfo.
- RawSubject []byte // DER encoded Subject
- RawIssuer []byte // DER encoded Issuer
-
- Signature []byte
- SignatureAlgorithm SignatureAlgorithm
-
- PublicKeyAlgorithm PublicKeyAlgorithm
- PublicKey interface{}
-
- Version int
- SerialNumber *big.Int
- Issuer pkix.Name
- Subject pkix.Name
- NotBefore, NotAfter time.Time // Validity bounds.
- KeyUsage KeyUsage
-
- // Extensions contains raw X.509 extensions. When parsing certificates,
- // this can be used to extract non-critical extensions that are not
- // parsed by this package. When marshaling certificates, the Extensions
- // field is ignored, see ExtraExtensions.
- Extensions []pkix.Extension
-
- // ExtraExtensions contains extensions to be copied, raw, into any
- // marshaled certificates. Values override any extensions that would
- // otherwise be produced based on the other fields. The ExtraExtensions
- // field is not populated when parsing certificates, see Extensions.
- ExtraExtensions []pkix.Extension
-
- // UnhandledCriticalExtensions contains a list of extension IDs that
- // were not (fully) processed when parsing. Verify will fail if this
- // slice is non-empty, unless verification is delegated to an OS
- // library which understands all the critical extensions.
- //
- // Users can access these extensions using Extensions and can remove
- // elements from this slice if they believe that they have been
- // handled.
- UnhandledCriticalExtensions []asn1.ObjectIdentifier
-
- ExtKeyUsage []ExtKeyUsage // Sequence of extended key usages.
- UnknownExtKeyUsage []asn1.ObjectIdentifier // Encountered extended key usages unknown to this package.
-
- BasicConstraintsValid bool // if true then the next two fields are valid.
- IsCA bool
- MaxPathLen int
- // MaxPathLenZero indicates that BasicConstraintsValid==true and
- // MaxPathLen==0 should be interpreted as an actual maximum path length
- // of zero. Otherwise, that combination is interpreted as MaxPathLen
- // not being set.
- MaxPathLenZero bool
-
- SubjectKeyId []byte
- AuthorityKeyId []byte
-
- // RFC 5280, 4.2.2.1 (Authority Information Access)
- OCSPServer []string
- IssuingCertificateURL []string
-
- // Subject Alternate Name values
- DNSNames []string
- EmailAddresses []string
- IPAddresses []net.IP
-
- // Name constraints
- PermittedDNSDomainsCritical bool // if true then the name constraints are marked critical.
- PermittedDNSDomains []string
-
- // CRL Distribution Points
- CRLDistributionPoints []string
-
- PolicyIdentifiers []asn1.ObjectIdentifier
-}
-
-// ErrUnsupportedAlgorithm results from attempting to perform an operation that
-// involves algorithms that are not currently implemented.
-var ErrUnsupportedAlgorithm = errors.New("x509: cannot verify signature: algorithm unimplemented")
-
-// An InsecureAlgorithmError
-type InsecureAlgorithmError SignatureAlgorithm
-
-func (e InsecureAlgorithmError) Error() string {
- return fmt.Sprintf("x509: cannot verify signature: insecure algorithm %v", SignatureAlgorithm(e))
-}
-
-// ConstraintViolationError results when a requested usage is not permitted by
-// a certificate. For example: checking a signature when the public key isn't a
-// certificate signing key.
-type ConstraintViolationError struct{}
-
-func (ConstraintViolationError) Error() string {
- return "x509: invalid signature: parent certificate cannot sign this kind of certificate"
-}
-
-func (c *Certificate) Equal(other *Certificate) bool {
- return bytes.Equal(c.Raw, other.Raw)
-}
-
-// Entrust have a broken root certificate (CN=Entrust.net Certification
-// Authority (2048)) which isn't marked as a CA certificate and is thus invalid
-// according to PKIX.
-// We recognise this certificate by its SubjectPublicKeyInfo and exempt it
-// from the Basic Constraints requirement.
-// See http://www.entrust.net/knowledge-base/technote.cfm?tn=7869
-//
-// TODO(agl): remove this hack once their reissued root is sufficiently
-// widespread.
-var entrustBrokenSPKI = []byte{
- 0x30, 0x82, 0x01, 0x22, 0x30, 0x0d, 0x06, 0x09,
- 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01,
- 0x01, 0x05, 0x00, 0x03, 0x82, 0x01, 0x0f, 0x00,
- 0x30, 0x82, 0x01, 0x0a, 0x02, 0x82, 0x01, 0x01,
- 0x00, 0x97, 0xa3, 0x2d, 0x3c, 0x9e, 0xde, 0x05,
- 0xda, 0x13, 0xc2, 0x11, 0x8d, 0x9d, 0x8e, 0xe3,
- 0x7f, 0xc7, 0x4b, 0x7e, 0x5a, 0x9f, 0xb3, 0xff,
- 0x62, 0xab, 0x73, 0xc8, 0x28, 0x6b, 0xba, 0x10,
- 0x64, 0x82, 0x87, 0x13, 0xcd, 0x57, 0x18, 0xff,
- 0x28, 0xce, 0xc0, 0xe6, 0x0e, 0x06, 0x91, 0x50,
- 0x29, 0x83, 0xd1, 0xf2, 0xc3, 0x2a, 0xdb, 0xd8,
- 0xdb, 0x4e, 0x04, 0xcc, 0x00, 0xeb, 0x8b, 0xb6,
- 0x96, 0xdc, 0xbc, 0xaa, 0xfa, 0x52, 0x77, 0x04,
- 0xc1, 0xdb, 0x19, 0xe4, 0xae, 0x9c, 0xfd, 0x3c,
- 0x8b, 0x03, 0xef, 0x4d, 0xbc, 0x1a, 0x03, 0x65,
- 0xf9, 0xc1, 0xb1, 0x3f, 0x72, 0x86, 0xf2, 0x38,
- 0xaa, 0x19, 0xae, 0x10, 0x88, 0x78, 0x28, 0xda,
- 0x75, 0xc3, 0x3d, 0x02, 0x82, 0x02, 0x9c, 0xb9,
- 0xc1, 0x65, 0x77, 0x76, 0x24, 0x4c, 0x98, 0xf7,
- 0x6d, 0x31, 0x38, 0xfb, 0xdb, 0xfe, 0xdb, 0x37,
- 0x02, 0x76, 0xa1, 0x18, 0x97, 0xa6, 0xcc, 0xde,
- 0x20, 0x09, 0x49, 0x36, 0x24, 0x69, 0x42, 0xf6,
- 0xe4, 0x37, 0x62, 0xf1, 0x59, 0x6d, 0xa9, 0x3c,
- 0xed, 0x34, 0x9c, 0xa3, 0x8e, 0xdb, 0xdc, 0x3a,
- 0xd7, 0xf7, 0x0a, 0x6f, 0xef, 0x2e, 0xd8, 0xd5,
- 0x93, 0x5a, 0x7a, 0xed, 0x08, 0x49, 0x68, 0xe2,
- 0x41, 0xe3, 0x5a, 0x90, 0xc1, 0x86, 0x55, 0xfc,
- 0x51, 0x43, 0x9d, 0xe0, 0xb2, 0xc4, 0x67, 0xb4,
- 0xcb, 0x32, 0x31, 0x25, 0xf0, 0x54, 0x9f, 0x4b,
- 0xd1, 0x6f, 0xdb, 0xd4, 0xdd, 0xfc, 0xaf, 0x5e,
- 0x6c, 0x78, 0x90, 0x95, 0xde, 0xca, 0x3a, 0x48,
- 0xb9, 0x79, 0x3c, 0x9b, 0x19, 0xd6, 0x75, 0x05,
- 0xa0, 0xf9, 0x88, 0xd7, 0xc1, 0xe8, 0xa5, 0x09,
- 0xe4, 0x1a, 0x15, 0xdc, 0x87, 0x23, 0xaa, 0xb2,
- 0x75, 0x8c, 0x63, 0x25, 0x87, 0xd8, 0xf8, 0x3d,
- 0xa6, 0xc2, 0xcc, 0x66, 0xff, 0xa5, 0x66, 0x68,
- 0x55, 0x02, 0x03, 0x01, 0x00, 0x01,
-}
-
-// CheckSignatureFrom verifies that the signature on c is a valid signature
-// from parent.
-func (c *Certificate) CheckSignatureFrom(parent *Certificate) error {
- // RFC 5280, 4.2.1.9:
- // "If the basic constraints extension is not present in a version 3
- // certificate, or the extension is present but the cA boolean is not
- // asserted, then the certified public key MUST NOT be used to verify
- // certificate signatures."
- // (except for Entrust, see comment above entrustBrokenSPKI)
- if (parent.Version == 3 && !parent.BasicConstraintsValid ||
- parent.BasicConstraintsValid && !parent.IsCA) &&
- !bytes.Equal(c.RawSubjectPublicKeyInfo, entrustBrokenSPKI) {
- return ConstraintViolationError{}
- }
-
- if parent.KeyUsage != 0 && parent.KeyUsage&KeyUsageCertSign == 0 {
- return ConstraintViolationError{}
- }
-
- if parent.PublicKeyAlgorithm == UnknownPublicKeyAlgorithm {
- return ErrUnsupportedAlgorithm
- }
-
- // TODO(agl): don't ignore the path length constraint.
-
- return parent.CheckSignature(c.SignatureAlgorithm, c.RawTBSCertificate, c.Signature)
-}
-
-// CheckSignature verifies that signature is a valid signature over signed from
-// c's public key.
-func (c *Certificate) CheckSignature(algo SignatureAlgorithm, signed, signature []byte) error {
- return checkSignature(algo, signed, signature, c.PublicKey)
-}
-
-// CheckSignature verifies that signature is a valid signature over signed from
-// a crypto.PublicKey.
-func checkSignature(algo SignatureAlgorithm, signed, signature []byte, publicKey crypto.PublicKey) (err error) {
- var hashType Hash
-
- switch algo {
- case SHA1WithRSA, DSAWithSHA1, ECDSAWithSHA1, SM2WithSHA1:
- hashType = SHA1
- case SHA256WithRSA, SHA256WithRSAPSS, DSAWithSHA256, ECDSAWithSHA256, SM2WithSHA256:
- hashType = SHA256
- case SHA384WithRSA, SHA384WithRSAPSS, ECDSAWithSHA384:
- hashType = SHA384
- case SHA512WithRSA, SHA512WithRSAPSS, ECDSAWithSHA512:
- hashType = SHA512
- case MD2WithRSA, MD5WithRSA:
- return InsecureAlgorithmError(algo)
- case SM2WithSM3: // SM3WithRSA reserve
- hashType = SM3
- default:
- return ErrUnsupportedAlgorithm
- }
-
- if !hashType.Available() {
- return ErrUnsupportedAlgorithm
- }
- h := hashType.New()
-
- h.Write(signed)
- digest := h.Sum(nil)
-
- switch pub := publicKey.(type) {
- case *rsa.PublicKey:
- if algo.isRSAPSS() {
- return rsa.VerifyPSS(pub, crypto.Hash(hashType), digest, signature, &rsa.PSSOptions{SaltLength: rsa.PSSSaltLengthEqualsHash})
- } else {
- return rsa.VerifyPKCS1v15(pub, crypto.Hash(hashType), digest, signature)
- }
- case *dsa.PublicKey:
- dsaSig := new(dsaSignature)
- if rest, err := asn1.Unmarshal(signature, dsaSig); err != nil {
- return err
- } else if len(rest) != 0 {
- return errors.New("x509: trailing data after DSA signature")
- }
- if dsaSig.R.Sign() <= 0 || dsaSig.S.Sign() <= 0 {
- return errors.New("x509: DSA signature contained zero or negative values")
- }
- if !dsa.Verify(pub, digest, dsaSig.R, dsaSig.S) {
- return errors.New("x509: DSA verification failure")
- }
- return
- case *ecdsa.PublicKey:
- ecdsaSig := new(ecdsaSignature)
- if rest, err := asn1.Unmarshal(signature, ecdsaSig); err != nil {
- return err
- } else if len(rest) != 0 {
- return errors.New("x509: trailing data after ECDSA signature")
- }
- if ecdsaSig.R.Sign() <= 0 || ecdsaSig.S.Sign() <= 0 {
- return errors.New("x509: ECDSA signature contained zero or negative values")
- }
- switch pub.Curve {
- case P256Sm2():
- if !Verify(&PublicKey{
- Curve: pub.Curve,
- X: pub.X,
- Y: pub.Y,
- }, digest, ecdsaSig.R, ecdsaSig.S) {
- return errors.New("x509: SM2 verification failure")
- }
- default:
- if !ecdsa.Verify(pub, digest, ecdsaSig.R, ecdsaSig.S) {
- return errors.New("x509: ECDSA verification failure")
- }
- }
- return
- }
- return ErrUnsupportedAlgorithm
-}
-
-// CheckCRLSignature checks that the signature in crl is from c.
-func (c *Certificate) CheckCRLSignature(crl *pkix.CertificateList) error {
- algo := getSignatureAlgorithmFromAI(crl.SignatureAlgorithm)
- return c.CheckSignature(algo, crl.TBSCertList.Raw, crl.SignatureValue.RightAlign())
-}
-
-type UnhandledCriticalExtension struct{}
-
-func (h UnhandledCriticalExtension) Error() string {
- return "x509: unhandled critical extension"
-}
-
-type basicConstraints struct {
- IsCA bool `asn1:"optional"`
- MaxPathLen int `asn1:"optional,default:-1"`
-}
-
-// RFC 5280 4.2.1.4
-type policyInformation struct {
- Policy asn1.ObjectIdentifier
- // policyQualifiers omitted
-}
-
-// RFC 5280, 4.2.1.10
-type nameConstraints struct {
- Permitted []generalSubtree `asn1:"optional,tag:0"`
- Excluded []generalSubtree `asn1:"optional,tag:1"`
-}
-
-type generalSubtree struct {
- Name string `asn1:"tag:2,optional,ia5"`
-}
-
-// RFC 5280, 4.2.2.1
-type authorityInfoAccess struct {
- Method asn1.ObjectIdentifier
- Location asn1.RawValue
-}
-
-// RFC 5280, 4.2.1.14
-type distributionPoint struct {
- DistributionPoint distributionPointName `asn1:"optional,tag:0"`
- Reason asn1.BitString `asn1:"optional,tag:1"`
- CRLIssuer asn1.RawValue `asn1:"optional,tag:2"`
-}
-
-type distributionPointName struct {
- FullName asn1.RawValue `asn1:"optional,tag:0"`
- RelativeName pkix.RDNSequence `asn1:"optional,tag:1"`
-}
-
-// asn1Null is the ASN.1 encoding of a NULL value.
-var asn1Null = []byte{5, 0}
-
-func parsePublicKey(algo PublicKeyAlgorithm, keyData *publicKeyInfo) (interface{}, error) {
- asn1Data := keyData.PublicKey.RightAlign()
- switch algo {
- case RSA:
- // RSA public keys must have a NULL in the parameters
- // (https://tools.ietf.org/html/rfc3279#section-2.3.1).
- if !bytes.Equal(keyData.Algorithm.Parameters.FullBytes, asn1Null) {
- return nil, errors.New("x509: RSA key missing NULL parameters")
- }
-
- p := new(rsaPublicKey)
- rest, err := asn1.Unmarshal(asn1Data, p)
- if err != nil {
- return nil, err
- }
- if len(rest) != 0 {
- return nil, errors.New("x509: trailing data after RSA public key")
- }
-
- if p.N.Sign() <= 0 {
- return nil, errors.New("x509: RSA modulus is not a positive number")
- }
- if p.E <= 0 {
- return nil, errors.New("x509: RSA public exponent is not a positive number")
- }
-
- pub := &rsa.PublicKey{
- E: p.E,
- N: p.N,
- }
- return pub, nil
- case DSA:
- var p *big.Int
- rest, err := asn1.Unmarshal(asn1Data, &p)
- if err != nil {
- return nil, err
- }
- if len(rest) != 0 {
- return nil, errors.New("x509: trailing data after DSA public key")
- }
- paramsData := keyData.Algorithm.Parameters.FullBytes
- params := new(dsaAlgorithmParameters)
- rest, err = asn1.Unmarshal(paramsData, params)
- if err != nil {
- return nil, err
- }
- if len(rest) != 0 {
- return nil, errors.New("x509: trailing data after DSA parameters")
- }
- if p.Sign() <= 0 || params.P.Sign() <= 0 || params.Q.Sign() <= 0 || params.G.Sign() <= 0 {
- return nil, errors.New("x509: zero or negative DSA parameter")
- }
- pub := &dsa.PublicKey{
- Parameters: dsa.Parameters{
- P: params.P,
- Q: params.Q,
- G: params.G,
- },
- Y: p,
- }
- return pub, nil
- case ECDSA:
- paramsData := keyData.Algorithm.Parameters.FullBytes
- namedCurveOID := new(asn1.ObjectIdentifier)
- rest, err := asn1.Unmarshal(paramsData, namedCurveOID)
- if err != nil {
- return nil, err
- }
- if len(rest) != 0 {
- return nil, errors.New("x509: trailing data after ECDSA parameters")
- }
- namedCurve := namedCurveFromOID(*namedCurveOID)
- if namedCurve == nil {
- return nil, errors.New("x509: unsupported elliptic curve")
- }
- x, y := elliptic.Unmarshal(namedCurve, asn1Data)
- if x == nil {
- return nil, errors.New("x509: failed to unmarshal elliptic curve point")
- }
- pub := &ecdsa.PublicKey{
- Curve: namedCurve,
- X: x,
- Y: y,
- }
- return pub, nil
- default:
- return nil, nil
- }
-}
-
-func parseSANExtension(value []byte) (dnsNames, emailAddresses []string, ipAddresses []net.IP, err error) {
- // RFC 5280, 4.2.1.6
-
- // SubjectAltName ::= GeneralNames
- //
- // GeneralNames ::= SEQUENCE SIZE (1..MAX) OF GeneralName
- //
- // GeneralName ::= CHOICE {
- // otherName [0] OtherName,
- // rfc822Name [1] IA5String,
- // dNSName [2] IA5String,
- // x400Address [3] ORAddress,
- // directoryName [4] Name,
- // ediPartyName [5] EDIPartyName,
- // uniformResourceIdentifier [6] IA5String,
- // iPAddress [7] OCTET STRING,
- // registeredID [8] OBJECT IDENTIFIER }
- var seq asn1.RawValue
- var rest []byte
- if rest, err = asn1.Unmarshal(value, &seq); err != nil {
- return
- } else if len(rest) != 0 {
- err = errors.New("x509: trailing data after X.509 extension")
- return
- }
- if !seq.IsCompound || seq.Tag != 16 || seq.Class != 0 {
- err = asn1.StructuralError{Msg: "bad SAN sequence"}
- return
- }
-
- rest = seq.Bytes
- for len(rest) > 0 {
- var v asn1.RawValue
- rest, err = asn1.Unmarshal(rest, &v)
- if err != nil {
- return
- }
- switch v.Tag {
- case 1:
- emailAddresses = append(emailAddresses, string(v.Bytes))
- case 2:
- dnsNames = append(dnsNames, string(v.Bytes))
- case 7:
- switch len(v.Bytes) {
- case net.IPv4len, net.IPv6len:
- ipAddresses = append(ipAddresses, v.Bytes)
- default:
- err = errors.New("x509: certificate contained IP address of length " + strconv.Itoa(len(v.Bytes)))
- return
- }
- }
- }
-
- return
-}
-
-func parseCertificate(in *certificate) (*Certificate, error) {
- out := new(Certificate)
- out.Raw = in.Raw
- out.RawTBSCertificate = in.TBSCertificate.Raw
- out.RawSubjectPublicKeyInfo = in.TBSCertificate.PublicKey.Raw
- out.RawSubject = in.TBSCertificate.Subject.FullBytes
- out.RawIssuer = in.TBSCertificate.Issuer.FullBytes
-
- out.Signature = in.SignatureValue.RightAlign()
- out.SignatureAlgorithm =
- getSignatureAlgorithmFromAI(in.TBSCertificate.SignatureAlgorithm)
-
- out.PublicKeyAlgorithm =
- getPublicKeyAlgorithmFromOID(in.TBSCertificate.PublicKey.Algorithm.Algorithm)
- var err error
- out.PublicKey, err = parsePublicKey(out.PublicKeyAlgorithm, &in.TBSCertificate.PublicKey)
- if err != nil {
- return nil, err
- }
-
- out.Version = in.TBSCertificate.Version + 1
- out.SerialNumber = in.TBSCertificate.SerialNumber
-
- var issuer, subject pkix.RDNSequence
- if rest, err := asn1.Unmarshal(in.TBSCertificate.Subject.FullBytes, &subject); err != nil {
- return nil, err
- } else if len(rest) != 0 {
- return nil, errors.New("x509: trailing data after X.509 subject")
- }
- if rest, err := asn1.Unmarshal(in.TBSCertificate.Issuer.FullBytes, &issuer); err != nil {
- return nil, err
- } else if len(rest) != 0 {
- return nil, errors.New("x509: trailing data after X.509 subject")
- }
-
- out.Issuer.FillFromRDNSequence(&issuer)
- out.Subject.FillFromRDNSequence(&subject)
-
- out.NotBefore = in.TBSCertificate.Validity.NotBefore
- out.NotAfter = in.TBSCertificate.Validity.NotAfter
-
- for _, e := range in.TBSCertificate.Extensions {
- out.Extensions = append(out.Extensions, e)
- unhandled := false
-
- if len(e.Id) == 4 && e.Id[0] == 2 && e.Id[1] == 5 && e.Id[2] == 29 {
- switch e.Id[3] {
- case 15:
- // RFC 5280, 4.2.1.3
- var usageBits asn1.BitString
- if rest, err := asn1.Unmarshal(e.Value, &usageBits); err != nil {
- return nil, err
- } else if len(rest) != 0 {
- return nil, errors.New("x509: trailing data after X.509 KeyUsage")
- }
-
- var usage int
- for i := 0; i < 9; i++ {
- if usageBits.At(i) != 0 {
- usage |= 1 << uint(i)
- }
- }
- out.KeyUsage = KeyUsage(usage)
-
- case 19:
- // RFC 5280, 4.2.1.9
- var constraints basicConstraints
- if rest, err := asn1.Unmarshal(e.Value, &constraints); err != nil {
- return nil, err
- } else if len(rest) != 0 {
- return nil, errors.New("x509: trailing data after X.509 BasicConstraints")
- }
-
- out.BasicConstraintsValid = true
- out.IsCA = constraints.IsCA
- out.MaxPathLen = constraints.MaxPathLen
- out.MaxPathLenZero = out.MaxPathLen == 0
-
- case 17:
- out.DNSNames, out.EmailAddresses, out.IPAddresses, err = parseSANExtension(e.Value)
- if err != nil {
- return nil, err
- }
-
- if len(out.DNSNames) == 0 && len(out.EmailAddresses) == 0 && len(out.IPAddresses) == 0 {
- // If we didn't parse anything then we do the critical check, below.
- unhandled = true
- }
-
- case 30:
- // RFC 5280, 4.2.1.10
-
- // NameConstraints ::= SEQUENCE {
- // permittedSubtrees [0] GeneralSubtrees OPTIONAL,
- // excludedSubtrees [1] GeneralSubtrees OPTIONAL }
- //
- // GeneralSubtrees ::= SEQUENCE SIZE (1..MAX) OF GeneralSubtree
- //
- // GeneralSubtree ::= SEQUENCE {
- // base GeneralName,
- // minimum [0] BaseDistance DEFAULT 0,
- // maximum [1] BaseDistance OPTIONAL }
- //
- // BaseDistance ::= INTEGER (0..MAX)
-
- var constraints nameConstraints
- if rest, err := asn1.Unmarshal(e.Value, &constraints); err != nil {
- return nil, err
- } else if len(rest) != 0 {
- return nil, errors.New("x509: trailing data after X.509 NameConstraints")
- }
-
- if len(constraints.Excluded) > 0 && e.Critical {
- return out, UnhandledCriticalExtension{}
- }
-
- for _, subtree := range constraints.Permitted {
- if len(subtree.Name) == 0 {
- if e.Critical {
- return out, UnhandledCriticalExtension{}
- }
- continue
- }
- out.PermittedDNSDomains = append(out.PermittedDNSDomains, subtree.Name)
- }
-
- case 31:
- // RFC 5280, 4.2.1.13
-
- // CRLDistributionPoints ::= SEQUENCE SIZE (1..MAX) OF DistributionPoint
- //
- // DistributionPoint ::= SEQUENCE {
- // distributionPoint [0] DistributionPointName OPTIONAL,
- // reasons [1] ReasonFlags OPTIONAL,
- // cRLIssuer [2] GeneralNames OPTIONAL }
- //
- // DistributionPointName ::= CHOICE {
- // fullName [0] GeneralNames,
- // nameRelativeToCRLIssuer [1] RelativeDistinguishedName }
-
- var cdp []distributionPoint
- if rest, err := asn1.Unmarshal(e.Value, &cdp); err != nil {
- return nil, err
- } else if len(rest) != 0 {
- return nil, errors.New("x509: trailing data after X.509 CRL distribution point")
- }
-
- for i := range cdp {
- // use index & pointer here to avoid value copy (each iteration copies 200 bytes)
- dp := &cdp[i]
- // Per RFC 5280, 4.2.1.13, one of distributionPoint or cRLIssuer may be empty.
- if len(dp.DistributionPoint.FullName.Bytes) == 0 {
- continue
- }
-
- var n asn1.RawValue
- if _, err := asn1.Unmarshal(dp.DistributionPoint.FullName.Bytes, &n); err != nil {
- return nil, err
- }
- // Trailing data after the fullName is
- // allowed because other elements of
- // the SEQUENCE can appear.
-
- if n.Tag == 6 {
- out.CRLDistributionPoints = append(out.CRLDistributionPoints, string(n.Bytes))
- }
- }
-
- case 35:
- // RFC 5280, 4.2.1.1
- var a authKeyId
- if rest, err := asn1.Unmarshal(e.Value, &a); err != nil {
- return nil, err
- } else if len(rest) != 0 {
- return nil, errors.New("x509: trailing data after X.509 authority key-id")
- }
- out.AuthorityKeyId = a.Id
-
- case 37:
- // RFC 5280, 4.2.1.12. Extended Key Usage
-
- // id-ce-extKeyUsage OBJECT IDENTIFIER ::= { id-ce 37 }
- //
- // ExtKeyUsageSyntax ::= SEQUENCE SIZE (1..MAX) OF KeyPurposeId
- //
- // KeyPurposeId ::= OBJECT IDENTIFIER
-
- var keyUsage []asn1.ObjectIdentifier
- if rest, err := asn1.Unmarshal(e.Value, &keyUsage); err != nil {
- return nil, err
- } else if len(rest) != 0 {
- return nil, errors.New("x509: trailing data after X.509 ExtendedKeyUsage")
- }
-
- for _, u := range keyUsage {
- if extKeyUsage, ok := extKeyUsageFromOID(u); ok {
- out.ExtKeyUsage = append(out.ExtKeyUsage, extKeyUsage)
- } else {
- out.UnknownExtKeyUsage = append(out.UnknownExtKeyUsage, u)
- }
- }
-
- case 14:
- // RFC 5280, 4.2.1.2
- var keyid []byte
- if rest, err := asn1.Unmarshal(e.Value, &keyid); err != nil {
- return nil, err
- } else if len(rest) != 0 {
- return nil, errors.New("x509: trailing data after X.509 key-id")
- }
- out.SubjectKeyId = keyid
-
- case 32:
- // RFC 5280 4.2.1.4: Certificate Policies
- var policies []policyInformation
- if rest, err := asn1.Unmarshal(e.Value, &policies); err != nil {
- return nil, err
- } else if len(rest) != 0 {
- return nil, errors.New("x509: trailing data after X.509 certificate policies")
- }
- out.PolicyIdentifiers = make([]asn1.ObjectIdentifier, len(policies))
- for i, policy := range policies {
- out.PolicyIdentifiers[i] = policy.Policy
- }
-
- default:
- // Unknown extensions are recorded if critical.
- unhandled = true
- }
- } else if e.Id.Equal(oidExtensionAuthorityInfoAccess) {
- // RFC 5280 4.2.2.1: Authority Information Access
- var aia []authorityInfoAccess
- if rest, err := asn1.Unmarshal(e.Value, &aia); err != nil {
- return nil, err
- } else if len(rest) != 0 {
- return nil, errors.New("x509: trailing data after X.509 authority information")
- }
-
- for _, v := range aia {
- // GeneralName: uniformResourceIdentifier [6] IA5String
- if v.Location.Tag != 6 {
- continue
- }
- if v.Method.Equal(oidAuthorityInfoAccessOcsp) {
- out.OCSPServer = append(out.OCSPServer, string(v.Location.Bytes))
- } else if v.Method.Equal(oidAuthorityInfoAccessIssuers) {
- out.IssuingCertificateURL = append(out.IssuingCertificateURL, string(v.Location.Bytes))
- }
- }
- } else {
- // Unknown extensions are recorded if critical.
- unhandled = true
- }
-
- if e.Critical && unhandled {
- out.UnhandledCriticalExtensions = append(out.UnhandledCriticalExtensions, e.Id)
- }
- }
-
- return out, nil
-}
-
-// ParseCertificate parses a single certificate from the given ASN.1 DER data.
-func ParseCertificate(asn1Data []byte) (*Certificate, error) {
- var cert certificate
- rest, err := asn1.Unmarshal(asn1Data, &cert)
- if err != nil {
- return nil, err
- }
- if len(rest) > 0 {
- return nil, asn1.SyntaxError{Msg: "trailing data"}
- }
-
- return parseCertificate(&cert)
-}
-
-// ParseCertificates parses one or more certificates from the given ASN.1 DER
-// data. The certificates must be concatenated with no intermediate padding.
-func ParseCertificates(asn1Data []byte) ([]*Certificate, error) {
- var v []*certificate
-
- for len(asn1Data) > 0 {
- cert := new(certificate)
- var err error
- asn1Data, err = asn1.Unmarshal(asn1Data, cert)
- if err != nil {
- return nil, err
- }
- v = append(v, cert)
- }
-
- ret := make([]*Certificate, len(v))
- for i, ci := range v {
- cert, err := parseCertificate(ci)
- if err != nil {
- return nil, err
- }
- ret[i] = cert
- }
-
- return ret, nil
-}
-
-func reverseBitsInAByte(in byte) byte {
- b1 := in>>4 | in<<4
- b2 := b1>>2&0x33 | b1<<2&0xcc
- b3 := b2>>1&0x55 | b2<<1&0xaa
- return b3
-}
-
-// asn1BitLength returns the bit-length of bitString by considering the
-// most-significant bit in a byte to be the "first" bit. This convention
-// matches ASN.1, but differs from almost everything else.
-func asn1BitLength(bitString []byte) int {
- bitLen := len(bitString) * 8
-
- for i := range bitString {
- b := bitString[len(bitString)-i-1]
-
- for bit := uint(0); bit < 8; bit++ {
- if (b>>bit)&1 == 1 {
- return bitLen
- }
- bitLen--
- }
- }
-
- return 0
-}
-
-var (
- oidExtensionSubjectKeyId = []int{2, 5, 29, 14}
- oidExtensionKeyUsage = []int{2, 5, 29, 15}
- oidExtensionExtendedKeyUsage = []int{2, 5, 29, 37}
- oidExtensionAuthorityKeyId = []int{2, 5, 29, 35}
- oidExtensionBasicConstraints = []int{2, 5, 29, 19}
- oidExtensionSubjectAltName = []int{2, 5, 29, 17}
- oidExtensionCertificatePolicies = []int{2, 5, 29, 32}
- oidExtensionNameConstraints = []int{2, 5, 29, 30}
- oidExtensionCRLDistributionPoints = []int{2, 5, 29, 31}
- oidExtensionAuthorityInfoAccess = []int{1, 3, 6, 1, 5, 5, 7, 1, 1}
-)
-
-var (
- oidAuthorityInfoAccessOcsp = asn1.ObjectIdentifier{1, 3, 6, 1, 5, 5, 7, 48, 1}
- oidAuthorityInfoAccessIssuers = asn1.ObjectIdentifier{1, 3, 6, 1, 5, 5, 7, 48, 2}
-)
-
-// oidNotInExtensions returns whether an extension with the given oid exists in
-// extensions.
-func oidInExtensions(oid asn1.ObjectIdentifier, extensions []pkix.Extension) bool {
- for _, e := range extensions {
- if e.Id.Equal(oid) {
- return true
- }
- }
- return false
-}
-
-// marshalSANs marshals a list of addresses into a the contents of an X.509
-// SubjectAlternativeName extension.
-func marshalSANs(dnsNames, emailAddresses []string, ipAddresses []net.IP) (derBytes []byte, err error) {
- var rawValues []asn1.RawValue
- for _, name := range dnsNames {
- rawValues = append(rawValues, asn1.RawValue{Tag: 2, Class: 2, Bytes: []byte(name)})
- }
- for _, email := range emailAddresses {
- rawValues = append(rawValues, asn1.RawValue{Tag: 1, Class: 2, Bytes: []byte(email)})
- }
- for _, rawIP := range ipAddresses {
- // If possible, we always want to encode IPv4 addresses in 4 bytes.
- ip := rawIP.To4()
- if ip == nil {
- ip = rawIP
- }
- rawValues = append(rawValues, asn1.RawValue{Tag: 7, Class: 2, Bytes: ip})
- }
- return asn1.Marshal(rawValues)
-}
-
-func buildExtensions(template *Certificate) (ret []pkix.Extension, err error) {
- ret = make([]pkix.Extension, 10 /* maximum number of elements. */)
- n := 0
-
- if template.KeyUsage != 0 &&
- !oidInExtensions(oidExtensionKeyUsage, template.ExtraExtensions) {
- ret[n].Id = oidExtensionKeyUsage
- ret[n].Critical = true
-
- var a [2]byte
- a[0] = reverseBitsInAByte(byte(template.KeyUsage))
- a[1] = reverseBitsInAByte(byte(template.KeyUsage >> 8))
-
- l := 1
- if a[1] != 0 {
- l = 2
- }
-
- bitString := a[:l]
- ret[n].Value, err = asn1.Marshal(asn1.BitString{Bytes: bitString, BitLength: asn1BitLength(bitString)})
- if err != nil {
- return
- }
- n++
- }
-
- if (len(template.ExtKeyUsage) > 0 || len(template.UnknownExtKeyUsage) > 0) &&
- !oidInExtensions(oidExtensionExtendedKeyUsage, template.ExtraExtensions) {
- ret[n].Id = oidExtensionExtendedKeyUsage
-
- var oids []asn1.ObjectIdentifier
- for _, u := range template.ExtKeyUsage {
- if oid, ok := oidFromExtKeyUsage(u); ok {
- oids = append(oids, oid)
- } else {
- panic("internal error")
- }
- }
-
- oids = append(oids, template.UnknownExtKeyUsage...)
-
- ret[n].Value, err = asn1.Marshal(oids)
- if err != nil {
- return
- }
- n++
- }
-
- if template.BasicConstraintsValid && !oidInExtensions(oidExtensionBasicConstraints, template.ExtraExtensions) {
- // Leaving MaxPathLen as zero indicates that no maximum path
- // length is desired, unless MaxPathLenZero is set. A value of
- // -1 causes encoding/asn1 to omit the value as desired.
- maxPathLen := template.MaxPathLen
- if maxPathLen == 0 && !template.MaxPathLenZero {
- maxPathLen = -1
- }
- ret[n].Id = oidExtensionBasicConstraints
- ret[n].Value, err = asn1.Marshal(basicConstraints{template.IsCA, maxPathLen})
- ret[n].Critical = true
- if err != nil {
- return
- }
- n++
- }
-
- if len(template.SubjectKeyId) > 0 && !oidInExtensions(oidExtensionSubjectKeyId, template.ExtraExtensions) {
- ret[n].Id = oidExtensionSubjectKeyId
- ret[n].Value, err = asn1.Marshal(template.SubjectKeyId)
- if err != nil {
- return
- }
- n++
- }
-
- if len(template.AuthorityKeyId) > 0 && !oidInExtensions(oidExtensionAuthorityKeyId, template.ExtraExtensions) {
- ret[n].Id = oidExtensionAuthorityKeyId
- ret[n].Value, err = asn1.Marshal(authKeyId{template.AuthorityKeyId})
- if err != nil {
- return
- }
- n++
- }
-
- if (len(template.OCSPServer) > 0 || len(template.IssuingCertificateURL) > 0) &&
- !oidInExtensions(oidExtensionAuthorityInfoAccess, template.ExtraExtensions) {
- ret[n].Id = oidExtensionAuthorityInfoAccess
- var aiaValues []authorityInfoAccess
- for _, name := range template.OCSPServer {
- aiaValues = append(aiaValues, authorityInfoAccess{
- Method: oidAuthorityInfoAccessOcsp,
- Location: asn1.RawValue{Tag: 6, Class: 2, Bytes: []byte(name)},
- })
- }
- for _, name := range template.IssuingCertificateURL {
- aiaValues = append(aiaValues, authorityInfoAccess{
- Method: oidAuthorityInfoAccessIssuers,
- Location: asn1.RawValue{Tag: 6, Class: 2, Bytes: []byte(name)},
- })
- }
- ret[n].Value, err = asn1.Marshal(aiaValues)
- if err != nil {
- return
- }
- n++
- }
-
- if (len(template.DNSNames) > 0 || len(template.EmailAddresses) > 0 || len(template.IPAddresses) > 0) &&
- !oidInExtensions(oidExtensionSubjectAltName, template.ExtraExtensions) {
- ret[n].Id = oidExtensionSubjectAltName
- ret[n].Value, err = marshalSANs(template.DNSNames, template.EmailAddresses, template.IPAddresses)
- if err != nil {
- return
- }
- n++
- }
-
- if len(template.PolicyIdentifiers) > 0 &&
- !oidInExtensions(oidExtensionCertificatePolicies, template.ExtraExtensions) {
- ret[n].Id = oidExtensionCertificatePolicies
- policies := make([]policyInformation, len(template.PolicyIdentifiers))
- for i, policy := range template.PolicyIdentifiers {
- policies[i].Policy = policy
- }
- ret[n].Value, err = asn1.Marshal(policies)
- if err != nil {
- return
- }
- n++
- }
-
- if len(template.PermittedDNSDomains) > 0 &&
- !oidInExtensions(oidExtensionNameConstraints, template.ExtraExtensions) {
- ret[n].Id = oidExtensionNameConstraints
- ret[n].Critical = template.PermittedDNSDomainsCritical
-
- var out nameConstraints
- out.Permitted = make([]generalSubtree, len(template.PermittedDNSDomains))
- for i, permitted := range template.PermittedDNSDomains {
- out.Permitted[i] = generalSubtree{Name: permitted}
- }
- ret[n].Value, err = asn1.Marshal(out)
- if err != nil {
- return
- }
- n++
- }
-
- if len(template.CRLDistributionPoints) > 0 &&
- !oidInExtensions(oidExtensionCRLDistributionPoints, template.ExtraExtensions) {
- ret[n].Id = oidExtensionCRLDistributionPoints
-
- var crlDp []distributionPoint
- for _, name := range template.CRLDistributionPoints {
- rawFullName, _ := asn1.Marshal(asn1.RawValue{Tag: 6, Class: 2, Bytes: []byte(name)})
-
- dp := distributionPoint{
- DistributionPoint: distributionPointName{
- FullName: asn1.RawValue{Tag: 0, Class: 2, IsCompound: true, Bytes: rawFullName},
- },
- }
- crlDp = append(crlDp, dp)
- }
-
- ret[n].Value, err = asn1.Marshal(crlDp)
- if err != nil {
- return
- }
- n++
- }
-
- // Adding another extension here? Remember to update the maximum number
- // of elements in the make() at the top of the function.
-
- return append(ret[:n], template.ExtraExtensions...), nil
-}
-
-func subjectBytes(cert *Certificate) ([]byte, error) {
- if len(cert.RawSubject) > 0 {
- return cert.RawSubject, nil
- }
-
- return asn1.Marshal(cert.Subject.ToRDNSequence())
-}
-
-// signingParamsForPublicKey returns the parameters to use for signing with
-// priv. If requestedSigAlgo is not zero then it overrides the default
-// signature algorithm.
-func signingParamsForPublicKey(pub interface{}, requestedSigAlgo SignatureAlgorithm) (hashFunc Hash, sigAlgo pkix.AlgorithmIdentifier, err error) {
- var pubType PublicKeyAlgorithm
-
- switch pub := pub.(type) {
- case *rsa.PublicKey:
- pubType = RSA
- hashFunc = SHA256
- sigAlgo.Algorithm = oidSignatureSHA256WithRSA
- sigAlgo.Parameters = asn1.RawValue{
- Tag: 5,
- }
-
- case *ecdsa.PublicKey:
- pubType = ECDSA
- switch pub.Curve {
- case elliptic.P224(), elliptic.P256():
- hashFunc = SHA256
- sigAlgo.Algorithm = oidSignatureECDSAWithSHA256
- case elliptic.P384():
- hashFunc = SHA384
- sigAlgo.Algorithm = oidSignatureECDSAWithSHA384
- case elliptic.P521():
- hashFunc = SHA512
- sigAlgo.Algorithm = oidSignatureECDSAWithSHA512
- default:
- err = errors.New("x509: unknown elliptic curve")
- }
- case *PublicKey:
- pubType = ECDSA
- switch pub.Curve {
- case P256Sm2():
- hashFunc = SM3
- sigAlgo.Algorithm = oidSignatureSM2WithSM3
- default:
- err = errors.New("x509: unknown SM2 curve")
- }
- default:
- err = errors.New("x509: only RSA and ECDSA keys supported")
- }
-
- if err != nil {
- return
- }
-
- if requestedSigAlgo == 0 {
- return
- }
-
- found := false
- for _, details := range signatureAlgorithmDetails {
- if details.algo == requestedSigAlgo {
- if details.pubKeyAlgo != pubType {
- err = errors.New("x509: requested SignatureAlgorithm does not match private key type")
- return
- }
- sigAlgo.Algorithm, hashFunc = details.oid, details.hash
- if hashFunc == 0 {
- err = errors.New("x509: cannot sign with hash function requested")
- return
- }
- if requestedSigAlgo.isRSAPSS() {
- sigAlgo.Parameters = rsaPSSParameters(hashFunc)
- }
- found = true
- break
- }
- }
-
- if !found {
- err = errors.New("x509: unknown SignatureAlgorithm")
- }
-
- return
-}
-
-// CreateCertificate creates a new certificate based on a template. The
-// following members of template are used: SerialNumber, Subject, NotBefore,
-// NotAfter, KeyUsage, ExtKeyUsage, UnknownExtKeyUsage, BasicConstraintsValid,
-// IsCA, MaxPathLen, SubjectKeyId, DNSNames, PermittedDNSDomainsCritical,
-// PermittedDNSDomains, SignatureAlgorithm.
-//
-// The certificate is signed by parent. If parent is equal to template then the
-// certificate is self-signed. The parameter pub is the public key of the
-// signee and priv is the private key of the signer.
-//
-// The returned slice is the certificate in DER encoding.
-//
-// All keys types that are implemented via crypto.Signer are supported (This
-// includes *rsa.PublicKey and *ecdsa.PublicKey.)
-func CreateCertificate(rand io.Reader, template, parent *Certificate, pub, priv interface{}) (cert []byte, err error) {
- key, ok := priv.(crypto.Signer)
- if !ok {
- return nil, errors.New("x509: certificate private key does not implement crypto.Signer")
- }
-
- if template.SerialNumber == nil {
- return nil, errors.New("x509: no SerialNumber given")
- }
-
- hashFunc, signatureAlgorithm, err := signingParamsForPublicKey(key.Public(), template.SignatureAlgorithm)
- if err != nil {
- return nil, err
- }
-
- publicKeyBytes, publicKeyAlgorithm, err := marshalPublicKey(pub)
- if err != nil {
- return nil, err
- }
-
- asn1Issuer, err := subjectBytes(parent)
- if err != nil {
- return
- }
-
- asn1Subject, err := subjectBytes(template)
- if err != nil {
- return
- }
-
- if !bytes.Equal(asn1Issuer, asn1Subject) && len(parent.SubjectKeyId) > 0 {
- template.AuthorityKeyId = parent.SubjectKeyId
- }
-
- extensions, err := buildExtensions(template)
- if err != nil {
- return
- }
- encodedPublicKey := asn1.BitString{BitLength: len(publicKeyBytes) * 8, Bytes: publicKeyBytes}
- c := tbsCertificate{
- Version: 2,
- SerialNumber: template.SerialNumber,
- SignatureAlgorithm: signatureAlgorithm,
- Issuer: asn1.RawValue{FullBytes: asn1Issuer},
- Validity: validity{template.NotBefore.UTC(), template.NotAfter.UTC()},
- Subject: asn1.RawValue{FullBytes: asn1Subject},
- PublicKey: publicKeyInfo{nil, publicKeyAlgorithm, encodedPublicKey},
- Extensions: extensions,
- }
-
- tbsCertContents, err := asn1.Marshal(c)
- if err != nil {
- return
- }
-
- c.Raw = tbsCertContents
-
- h := hashFunc.New()
- h.Write(tbsCertContents)
- digest := h.Sum(nil)
-
- var signerOpts crypto.SignerOpts
- signerOpts = hashFunc
- if template.SignatureAlgorithm != 0 && template.SignatureAlgorithm.isRSAPSS() {
- signerOpts = &rsa.PSSOptions{
- SaltLength: rsa.PSSSaltLengthEqualsHash,
- Hash: crypto.Hash(hashFunc),
- }
- }
-
- var signature []byte
- signature, err = key.Sign(rand, digest, signerOpts)
- if err != nil {
- return
- }
-
- return asn1.Marshal(certificate{
- nil,
- c,
- signatureAlgorithm,
- asn1.BitString{Bytes: signature, BitLength: len(signature) * 8},
- })
-}
-
-// pemCRLPrefix is the magic string that indicates that we have a PEM encoded
-// CRL.
-var pemCRLPrefix = []byte("-----BEGIN X509 CRL")
-
-// pemType is the type of a PEM encoded CRL.
-var pemType = "X509 CRL"
-
-// ParseCRL parses a CRL from the given bytes. It's often the case that PEM
-// encoded CRLs will appear where they should be DER encoded, so this function
-// will transparently handle PEM encoding as long as there isn't any leading
-// garbage.
-func ParseCRL(crlBytes []byte) (*pkix.CertificateList, error) {
- if bytes.HasPrefix(crlBytes, pemCRLPrefix) {
- block, _ := pem.Decode(crlBytes)
- if block != nil && block.Type == pemType {
- crlBytes = block.Bytes
- }
- }
- return ParseDERCRL(crlBytes)
-}
-
-// ParseDERCRL parses a DER encoded CRL from the given bytes.
-func ParseDERCRL(derBytes []byte) (*pkix.CertificateList, error) {
- certList := new(pkix.CertificateList)
- if rest, err := asn1.Unmarshal(derBytes, certList); err != nil {
- return nil, err
- } else if len(rest) != 0 {
- return nil, errors.New("x509: trailing data after CRL")
- }
- return certList, nil
-}
-
-// CreateCRL returns a DER encoded CRL, signed by this Certificate, that
-// contains the given list of revoked certificates.
-func (c *Certificate) CreateCRL(rand io.Reader, priv interface{}, revokedCerts []pkix.RevokedCertificate, now, expiry time.Time) (crlBytes []byte, err error) {
- key, ok := priv.(crypto.Signer)
- if !ok {
- return nil, errors.New("x509: certificate private key does not implement crypto.Signer")
- }
-
- hashFunc, signatureAlgorithm, err := signingParamsForPublicKey(key.Public(), 0)
- if err != nil {
- return nil, err
- }
-
- // Force revocation times to UTC per RFC 5280.
- revokedCertsUTC := make([]pkix.RevokedCertificate, len(revokedCerts))
- for i, rc := range revokedCerts {
- rc.RevocationTime = rc.RevocationTime.UTC()
- revokedCertsUTC[i] = rc
- }
-
- tbsCertList := pkix.TBSCertificateList{
- Version: 1,
- Signature: signatureAlgorithm,
- Issuer: c.Subject.ToRDNSequence(),
- ThisUpdate: now.UTC(),
- NextUpdate: expiry.UTC(),
- RevokedCertificates: revokedCertsUTC,
- }
-
- // Authority Key Id
- if len(c.SubjectKeyId) > 0 {
- var aki pkix.Extension
- aki.Id = oidExtensionAuthorityKeyId
- aki.Value, err = asn1.Marshal(authKeyId{Id: c.SubjectKeyId})
- if err != nil {
- return
- }
- tbsCertList.Extensions = append(tbsCertList.Extensions, aki)
- }
-
- tbsCertListContents, err := asn1.Marshal(tbsCertList)
- if err != nil {
- return
- }
-
- h := hashFunc.New()
- h.Write(tbsCertListContents)
- digest := h.Sum(nil)
-
- var signature []byte
- signature, err = key.Sign(rand, digest, hashFunc)
- if err != nil {
- return
- }
-
- return asn1.Marshal(pkix.CertificateList{
- TBSCertList: tbsCertList,
- SignatureAlgorithm: signatureAlgorithm,
- SignatureValue: asn1.BitString{Bytes: signature, BitLength: len(signature) * 8},
- })
-}
-
-// CertificateRequest represents a PKCS #10, certificate signature request.
-type CertificateRequest struct {
- Raw []byte // Complete ASN.1 DER content (CSR, signature algorithm and signature).
- RawTBSCertificateRequest []byte // Certificate request info part of raw ASN.1 DER content.
- RawSubjectPublicKeyInfo []byte // DER encoded SubjectPublicKeyInfo.
- RawSubject []byte // DER encoded Subject.
-
- Version int
- Signature []byte
- SignatureAlgorithm SignatureAlgorithm
-
- PublicKeyAlgorithm PublicKeyAlgorithm
- PublicKey interface{}
-
- Subject pkix.Name
-
- // Attributes is the dried husk of a bug and shouldn't be used.
- Attributes []pkix.AttributeTypeAndValueSET
-
- // Extensions contains raw X.509 extensions. When parsing CSRs, this
- // can be used to extract extensions that are not parsed by this
- // package.
- Extensions []pkix.Extension
-
- // ExtraExtensions contains extensions to be copied, raw, into any
- // marshaled CSR. Values override any extensions that would otherwise
- // be produced based on the other fields but are overridden by any
- // extensions specified in Attributes.
- //
- // The ExtraExtensions field is not populated when parsing CSRs, see
- // Extensions.
- ExtraExtensions []pkix.Extension
-
- // Subject Alternate Name values.
- DNSNames []string
- EmailAddresses []string
- IPAddresses []net.IP
-}
-
-// These structures reflect the ASN.1 structure of X.509 certificate
-// signature requests (see RFC 2986):
-
-type tbsCertificateRequest struct {
- Raw asn1.RawContent
- Version int
- Subject asn1.RawValue
- PublicKey publicKeyInfo
- RawAttributes []asn1.RawValue `asn1:"tag:0"`
-}
-
-type certificateRequest struct {
- Raw asn1.RawContent
- TBSCSR tbsCertificateRequest
- SignatureAlgorithm pkix.AlgorithmIdentifier
- SignatureValue asn1.BitString
-}
-
-// oidExtensionRequest is a PKCS#9 OBJECT IDENTIFIER that indicates requested
-// extensions in a CSR.
-var oidExtensionRequest = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 9, 14}
-
-// newRawAttributes converts AttributeTypeAndValueSETs from a template
-// CertificateRequest's Attributes into tbsCertificateRequest RawAttributes.
-func newRawAttributes(attributes []pkix.AttributeTypeAndValueSET) ([]asn1.RawValue, error) {
- var rawAttributes []asn1.RawValue
- b, err := asn1.Marshal(attributes)
- if err != nil {
- return nil, err
- }
- rest, err := asn1.Unmarshal(b, &rawAttributes)
- if err != nil {
- return nil, err
- }
- if len(rest) != 0 {
- return nil, errors.New("x509: failed to unmarshal raw CSR Attributes")
- }
- return rawAttributes, nil
-}
-
-// parseRawAttributes Unmarshals RawAttributes intos AttributeTypeAndValueSETs.
-func parseRawAttributes(rawAttributes []asn1.RawValue) []pkix.AttributeTypeAndValueSET {
- var attributes []pkix.AttributeTypeAndValueSET
- for _, rawAttr := range rawAttributes {
- var attr pkix.AttributeTypeAndValueSET
- rest, err := asn1.Unmarshal(rawAttr.FullBytes, &attr)
- // Ignore attributes that don't parse into pkix.AttributeTypeAndValueSET
- // (i.e.: challengePassword or unstructuredName).
- if err == nil && len(rest) == 0 {
- attributes = append(attributes, attr)
- }
- }
- return attributes
-}
-
-// parseCSRExtensions parses the attributes from a CSR and extracts any
-// requested extensions.
-func parseCSRExtensions(rawAttributes []asn1.RawValue) ([]pkix.Extension, error) {
- // pkcs10Attribute reflects the Attribute structure from section 4.1 of
- // https://tools.ietf.org/html/rfc2986.
- type pkcs10Attribute struct {
- Id asn1.ObjectIdentifier
- Values []asn1.RawValue `asn1:"set"`
- }
-
- var ret []pkix.Extension
- for _, rawAttr := range rawAttributes {
- var attr pkcs10Attribute
- if rest, err := asn1.Unmarshal(rawAttr.FullBytes, &attr); err != nil || len(rest) != 0 || len(attr.Values) == 0 {
- // Ignore attributes that don't parse.
- continue
- }
-
- if !attr.Id.Equal(oidExtensionRequest) {
- continue
- }
-
- var extensions []pkix.Extension
- if _, err := asn1.Unmarshal(attr.Values[0].FullBytes, &extensions); err != nil {
- return nil, err
- }
- ret = append(ret, extensions...)
- }
-
- return ret, nil
-}
-
-// CreateCertificateRequest creates a new certificate request based on a template.
-// The following members of template are used: Subject, Attributes,
-// SignatureAlgorithm, Extensions, DNSNames, EmailAddresses, and IPAddresses.
-// The private key is the private key of the signer.
-//
-// The returned slice is the certificate request in DER encoding.
-//
-// All keys types that are implemented via crypto.Signer are supported (This
-// includes *rsa.PublicKey and *ecdsa.PublicKey.)
-func CreateCertificateRequest(rand io.Reader, template *CertificateRequest, priv interface{}) (csr []byte, err error) {
- key, ok := priv.(crypto.Signer)
- if !ok {
- return nil, errors.New("x509: certificate private key does not implement crypto.Signer")
- }
-
- var hashFunc Hash
- var sigAlgo pkix.AlgorithmIdentifier
- hashFunc, sigAlgo, err = signingParamsForPublicKey(key.Public(), template.SignatureAlgorithm)
- if err != nil {
- return nil, err
- }
-
- var publicKeyBytes []byte
- var publicKeyAlgorithm pkix.AlgorithmIdentifier
- publicKeyBytes, publicKeyAlgorithm, err = marshalPublicKey(key.Public())
- if err != nil {
- return nil, err
- }
-
- var extensions []pkix.Extension
-
- if (len(template.DNSNames) > 0 || len(template.EmailAddresses) > 0 || len(template.IPAddresses) > 0) &&
- !oidInExtensions(oidExtensionSubjectAltName, template.ExtraExtensions) {
- sanBytes, err := marshalSANs(template.DNSNames, template.EmailAddresses, template.IPAddresses)
- if err != nil {
- return nil, err
- }
-
- extensions = append(extensions, pkix.Extension{
- Id: oidExtensionSubjectAltName,
- Value: sanBytes,
- })
- }
-
- extensions = append(extensions, template.ExtraExtensions...)
-
- var attributes []pkix.AttributeTypeAndValueSET
- attributes = append(attributes, template.Attributes...)
-
- if len(extensions) > 0 {
- // specifiedExtensions contains all the extensions that we
- // found specified via template.Attributes.
- specifiedExtensions := make(map[string]bool)
-
- for _, atvSet := range template.Attributes {
- if !atvSet.Type.Equal(oidExtensionRequest) {
- continue
- }
-
- for _, atvs := range atvSet.Value {
- for _, atv := range atvs {
- specifiedExtensions[atv.Type.String()] = true
- }
- }
- }
-
- atvs := make([]pkix.AttributeTypeAndValue, 0, len(extensions))
- for _, e := range extensions {
- if specifiedExtensions[e.Id.String()] {
- // Attributes already contained a value for
- // this extension and it takes priority.
- continue
- }
-
- atvs = append(atvs, pkix.AttributeTypeAndValue{
- // There is no place for the critical flag in a CSR.
- Type: e.Id,
- Value: e.Value,
- })
- }
-
- // Append the extensions to an existing attribute if possible.
- appended := false
- for _, atvSet := range attributes {
- if !atvSet.Type.Equal(oidExtensionRequest) || len(atvSet.Value) == 0 {
- continue
- }
-
- atvSet.Value[0] = append(atvSet.Value[0], atvs...)
- appended = true
- break
- }
-
- // Otherwise, add a new attribute for the extensions.
- if !appended {
- attributes = append(attributes, pkix.AttributeTypeAndValueSET{
- Type: oidExtensionRequest,
- Value: [][]pkix.AttributeTypeAndValue{
- atvs,
- },
- })
- }
- }
-
- asn1Subject := template.RawSubject
- if len(asn1Subject) == 0 {
- asn1Subject, err = asn1.Marshal(template.Subject.ToRDNSequence())
- if err != nil {
- return
- }
- }
-
- rawAttributes, err := newRawAttributes(attributes)
- if err != nil {
- return
- }
-
- tbsCSR := tbsCertificateRequest{
- Version: 0, // PKCS #10, RFC 2986
- Subject: asn1.RawValue{FullBytes: asn1Subject},
- PublicKey: publicKeyInfo{
- Algorithm: publicKeyAlgorithm,
- PublicKey: asn1.BitString{
- Bytes: publicKeyBytes,
- BitLength: len(publicKeyBytes) * 8,
- },
- },
- RawAttributes: rawAttributes,
- }
-
- tbsCSRContents, err := asn1.Marshal(tbsCSR)
- if err != nil {
- return
- }
- tbsCSR.Raw = tbsCSRContents
-
- h := hashFunc.New()
- h.Write(tbsCSRContents)
- digest := h.Sum(nil)
-
- var signature []byte
- signature, err = key.Sign(rand, digest, hashFunc)
- if err != nil {
- return
- }
-
- return asn1.Marshal(certificateRequest{
- TBSCSR: tbsCSR,
- SignatureAlgorithm: sigAlgo,
- SignatureValue: asn1.BitString{
- Bytes: signature,
- BitLength: len(signature) * 8,
- },
- })
-}
-
-// ParseCertificateRequest parses a single certificate request from the
-// given ASN.1 DER data.
-func ParseCertificateRequest(asn1Data []byte) (*CertificateRequest, error) {
- var csr certificateRequest
-
- rest, err := asn1.Unmarshal(asn1Data, &csr)
- if err != nil {
- return nil, err
- } else if len(rest) != 0 {
- return nil, asn1.SyntaxError{Msg: "trailing data"}
- }
-
- return parseCertificateRequest(&csr)
-}
-
-func parseCertificateRequest(in *certificateRequest) (*CertificateRequest, error) {
- out := &CertificateRequest{
- Raw: in.Raw,
- RawTBSCertificateRequest: in.TBSCSR.Raw,
- RawSubjectPublicKeyInfo: in.TBSCSR.PublicKey.Raw,
- RawSubject: in.TBSCSR.Subject.FullBytes,
-
- Signature: in.SignatureValue.RightAlign(),
- SignatureAlgorithm: getSignatureAlgorithmFromAI(in.SignatureAlgorithm),
-
- PublicKeyAlgorithm: getPublicKeyAlgorithmFromOID(in.TBSCSR.PublicKey.Algorithm.Algorithm),
-
- Version: in.TBSCSR.Version,
- Attributes: parseRawAttributes(in.TBSCSR.RawAttributes),
- }
-
- var err error
- out.PublicKey, err = parsePublicKey(out.PublicKeyAlgorithm, &in.TBSCSR.PublicKey)
- if err != nil {
- return nil, err
- }
-
- var subject pkix.RDNSequence
- if rest, err := asn1.Unmarshal(in.TBSCSR.Subject.FullBytes, &subject); err != nil {
- return nil, err
- } else if len(rest) != 0 {
- return nil, errors.New("x509: trailing data after X.509 Subject")
- }
-
- out.Subject.FillFromRDNSequence(&subject)
-
- if out.Extensions, err = parseCSRExtensions(in.TBSCSR.RawAttributes); err != nil {
- return nil, err
- }
-
- for _, extension := range out.Extensions {
- if extension.Id.Equal(oidExtensionSubjectAltName) {
- out.DNSNames, out.EmailAddresses, out.IPAddresses, err = parseSANExtension(extension.Value)
- if err != nil {
- return nil, err
- }
- }
- }
-
- return out, nil
-}
-
-// CheckSignature reports whether the signature on c is valid.
-func (c *CertificateRequest) CheckSignature() error {
- return checkSignature(c.SignatureAlgorithm, c.RawTBSCertificateRequest, c.Signature, c.PublicKey)
-}
-
-func ReadCertificateRequestFromMem(data []byte) (*CertificateRequest, error) {
- block, _ := pem.Decode(data)
- if block == nil {
- return nil, errors.New("failed to decode certificate request")
- }
- return ParseCertificateRequest(block.Bytes)
-}
-
-func ReadCertificateRequestFromPem(FileName string) (*CertificateRequest, error) {
- data, err := ioutil.ReadFile(FileName)
- if err != nil {
- return nil, err
- }
- return ReadCertificateRequestFromMem(data)
-}
-
-func CreateCertificateRequestToMem(template *CertificateRequest, privKey *PrivateKey) ([]byte, error) {
- der, err := CreateCertificateRequest(rand.Reader, template, privKey)
- if err != nil {
- return nil, err
- }
- block := &pem.Block{
- Type: "CERTIFICATE REQUEST",
- Bytes: der,
- }
- return pem.EncodeToMemory(block), nil
-}
-
-func CreateCertificateRequestToPem(FileName string, template *CertificateRequest,
- privKey *PrivateKey) (bool, error) {
- der, err := CreateCertificateRequest(rand.Reader, template, privKey)
- if err != nil {
- return false, err
- }
- block := &pem.Block{
- Type: "CERTIFICATE REQUEST",
- Bytes: der,
- }
- file, err := os.Create(FileName)
- if err != nil {
- return false, err
- }
- defer file.Close()
- err = pem.Encode(file, block)
- if err != nil {
- return false, err
- }
- return true, nil
-}
-
-func ReadCertificateFromMem(data []byte) (*Certificate, error) {
- block, _ := pem.Decode(data)
- if block == nil {
- return nil, errors.New("failed to decode certificate request")
- }
- return ParseCertificate(block.Bytes)
-}
-
-func ReadCertificateFromPem(FileName string) (*Certificate, error) {
- data, err := ioutil.ReadFile(FileName)
- if err != nil {
- return nil, err
- }
- return ReadCertificateFromMem(data)
-}
-
-func CreateCertificateToMem(template, parent *Certificate, pubKey *PublicKey, privKey *PrivateKey) ([]byte, error) {
- der, err := CreateCertificate(rand.Reader, template, parent, pubKey, privKey)
- if err != nil {
- return nil, err
- }
- block := &pem.Block{
- Type: "CERTIFICATE",
- Bytes: der,
- }
- return pem.EncodeToMemory(block), nil
-}
-
-func CreateCertificateToPem(FileName string, template, parent *Certificate, pubKey *PublicKey, privKey *PrivateKey) (bool, error) {
- der, err := CreateCertificate(rand.Reader, template, parent, pubKey, privKey)
- if err != nil {
- return false, err
- }
- block := &pem.Block{
- Type: "CERTIFICATE",
- Bytes: der,
- }
- file, err := os.Create(FileName)
- if err != nil {
- return false, err
- }
- defer file.Close()
- err = pem.Encode(file, block)
- if err != nil {
- return false, err
- }
- return true, nil
-}
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