crypto: inside-secure - Use defines instead of some constants (cosmetic)

This patch replaces some hard constants regarding key, IV and nonce sizes
with appropriate defines from the crypto header files.

Signed-off-by: Pascal van Leeuwen <pvanleeuwen@verimatrix.com>
Acked-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/inside-secure/safexcel_cipher.c b/drivers/crypto/inside-secure/safexcel_cipher.c
index 477e0ec..718d64f 100644 (file)
--- a/drivers/crypto/inside-secure/safexcel_cipher.c
+++ b/drivers/crypto/inside-secure/safexcel_cipher.c
@@ -12,6 +12,7 @@
 #include <crypto/aead.h>
 #include <crypto/aes.h>
 #include <crypto/authenc.h>
+#include <crypto/ctr.h>
 #include <crypto/des.h>
 #include <crypto/sha.h>
 #include <crypto/skcipher.h>
@@ -226,19 +227,21 @@ static int safexcel_aead_setkey(struct crypto_aead *ctfm, const u8 *key,
                goto badkey;
 
        if (ctx->mode == CONTEXT_CONTROL_CRYPTO_MODE_CTR_LOAD) {
-               /* 20 is minimum AES key: 16 bytes + 4 bytes nonce */
-               if (keys.enckeylen < 20)
+               /* Minimum keysize is minimum AES key size + nonce size */
+               if (keys.enckeylen < (AES_MIN_KEY_SIZE +
+                                     CTR_RFC3686_NONCE_SIZE))
                        goto badkey;
                /* last 4 bytes of key are the nonce! */
-               ctx->nonce = *(u32 *)(keys.enckey + keys.enckeylen - 4);
+               ctx->nonce = *(u32 *)(keys.enckey + keys.enckeylen -
+                                     CTR_RFC3686_NONCE_SIZE);
                /* exclude the nonce here */
-               keys.enckeylen -= 4;
+               keys.enckeylen -= CONTEXT_CONTROL_CRYPTO_MODE_CTR_LOAD;
        }
 
        /* Encryption key */
        switch (ctx->alg) {
        case SAFEXCEL_3DES:
-               if (keys.enckeylen != 24)
+               if (keys.enckeylen != DES3_EDE_KEY_SIZE)
                        goto badkey;
                flags = crypto_aead_get_flags(ctfm);
                err = __des3_verify_key(&flags, keys.enckey);
@@ -1119,9 +1122,9 @@ static int safexcel_skcipher_aesctr_setkey(struct crypto_skcipher *ctfm,
        unsigned int keylen;
 
        /* last 4 bytes of key are the nonce! */
-       ctx->nonce = *(u32 *)(key + len - 4);
+       ctx->nonce = *(u32 *)(key + len - CTR_RFC3686_NONCE_SIZE);
        /* exclude the nonce here */
-       keylen = len - 4;
+       keylen = len - CTR_RFC3686_NONCE_SIZE;
        ret = aes_expandkey(&aes, key, keylen);
        if (ret) {
                crypto_skcipher_set_flags(ctfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
@@ -1152,10 +1155,10 @@ struct safexcel_alg_template safexcel_alg_ctr_aes = {
                .setkey = safexcel_skcipher_aesctr_setkey,
                .encrypt = safexcel_ctr_aes_encrypt,
                .decrypt = safexcel_ctr_aes_decrypt,
-               /* Add 4 to include the 4 byte nonce! */
-               .min_keysize = AES_MIN_KEY_SIZE + 4,
-               .max_keysize = AES_MAX_KEY_SIZE + 4,
-               .ivsize = 8,
+               /* Add nonce size */
+               .min_keysize = AES_MIN_KEY_SIZE + CTR_RFC3686_NONCE_SIZE,
+               .max_keysize = AES_MAX_KEY_SIZE + CTR_RFC3686_NONCE_SIZE,
+               .ivsize = CTR_RFC3686_IV_SIZE,
                .base = {
                        .cra_name = "rfc3686(ctr(aes))",
                        .cra_driver_name = "safexcel-ctr-aes",
@@ -1657,7 +1660,7 @@ struct safexcel_alg_template safexcel_alg_authenc_hmac_sha1_ctr_aes = {
                .setkey = safexcel_aead_setkey,
                .encrypt = safexcel_aead_encrypt_aes,
                .decrypt = safexcel_aead_decrypt_aes,
-               .ivsize = 8,
+               .ivsize = CTR_RFC3686_IV_SIZE,
                .maxauthsize = SHA1_DIGEST_SIZE,
                .base = {
                        .cra_name = "authenc(hmac(sha1),rfc3686(ctr(aes)))",
@@ -1690,7 +1693,7 @@ struct safexcel_alg_template safexcel_alg_authenc_hmac_sha256_ctr_aes = {
                .setkey = safexcel_aead_setkey,
                .encrypt = safexcel_aead_encrypt_aes,
                .decrypt = safexcel_aead_decrypt_aes,
-               .ivsize = 8,
+               .ivsize = CTR_RFC3686_IV_SIZE,
                .maxauthsize = SHA256_DIGEST_SIZE,
                .base = {
                        .cra_name = "authenc(hmac(sha256),rfc3686(ctr(aes)))",
@@ -1723,7 +1726,7 @@ struct safexcel_alg_template safexcel_alg_authenc_hmac_sha224_ctr_aes = {
                .setkey = safexcel_aead_setkey,
                .encrypt = safexcel_aead_encrypt_aes,
                .decrypt = safexcel_aead_decrypt_aes,
-               .ivsize = 8,
+               .ivsize = CTR_RFC3686_IV_SIZE,
                .maxauthsize = SHA224_DIGEST_SIZE,
                .base = {
                        .cra_name = "authenc(hmac(sha224),rfc3686(ctr(aes)))",
@@ -1756,7 +1759,7 @@ struct safexcel_alg_template safexcel_alg_authenc_hmac_sha512_ctr_aes = {
                .setkey = safexcel_aead_setkey,
                .encrypt = safexcel_aead_encrypt_aes,
                .decrypt = safexcel_aead_decrypt_aes,
-               .ivsize = 8,
+               .ivsize = CTR_RFC3686_IV_SIZE,
                .maxauthsize = SHA512_DIGEST_SIZE,
                .base = {
                        .cra_name = "authenc(hmac(sha512),rfc3686(ctr(aes)))",
@@ -1789,7 +1792,7 @@ struct safexcel_alg_template safexcel_alg_authenc_hmac_sha384_ctr_aes = {
                .setkey = safexcel_aead_setkey,
                .encrypt = safexcel_aead_encrypt_aes,
                .decrypt = safexcel_aead_decrypt_aes,
-               .ivsize = 8,
+               .ivsize = CTR_RFC3686_IV_SIZE,
                .maxauthsize = SHA384_DIGEST_SIZE,
                .base = {
                        .cra_name = "authenc(hmac(sha384),rfc3686(ctr(aes)))",