X-Git-Url: http://git.osdn.net/view?a=blobdiff_plain;f=third-party%2Fopenssl-1.0.2d%2Fcrypto%2Fdsa%2Fdsa_key.c;fp=third-party%2Fopenssl-1.0.2d%2Fcrypto%2Fdsa%2Fdsa_key.c;h=e8c8d2e6aac2e6fb22e2e3beeb5bca5399564be6;hb=3d0f5661d0cd3583f7d7b0b8158703b6cb3a4e4d;hp=0000000000000000000000000000000000000000;hpb=071cc1ce9be277e9175381194150b7b5461bd586;p=wordring-tm%2Fwordring-tm.git diff --git a/third-party/openssl-1.0.2d/crypto/dsa/dsa_key.c b/third-party/openssl-1.0.2d/crypto/dsa/dsa_key.c new file mode 100644 index 0000000..e8c8d2e --- /dev/null +++ b/third-party/openssl-1.0.2d/crypto/dsa/dsa_key.c @@ -0,0 +1,145 @@ +/* crypto/dsa/dsa_key.c */ +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) + * All rights reserved. + * + * This package is an SSL implementation written + * by Eric Young (eay@cryptsoft.com). + * The implementation was written so as to conform with Netscapes SSL. + * + * This library is free for commercial and non-commercial use as long as + * the following conditions are aheared to. The following conditions + * apply to all code found in this distribution, be it the RC4, RSA, + * lhash, DES, etc., code; not just the SSL code. The SSL documentation + * included with this distribution is covered by the same copyright terms + * except that the holder is Tim Hudson (tjh@cryptsoft.com). + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. + * If this package is used in a product, Eric Young should be given attribution + * as the author of the parts of the library used. + * This can be in the form of a textual message at program startup or + * in documentation (online or textual) provided with the package. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * "This product includes cryptographic software written by + * Eric Young (eay@cryptsoft.com)" + * The word 'cryptographic' can be left out if the rouines from the library + * being used are not cryptographic related :-). + * 4. If you include any Windows specific code (or a derivative thereof) from + * the apps directory (application code) you must include an acknowledgement: + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" + * + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * The licence and distribution terms for any publically available version or + * derivative of this code cannot be changed. i.e. this code cannot simply be + * copied and put under another distribution licence + * [including the GNU Public Licence.] + */ + +#include +#include +#include "cryptlib.h" +#ifndef OPENSSL_NO_SHA +# include +# include +# include + +# ifdef OPENSSL_FIPS +# include +# endif + +static int dsa_builtin_keygen(DSA *dsa); + +int DSA_generate_key(DSA *dsa) +{ +# ifdef OPENSSL_FIPS + if (FIPS_mode() && !(dsa->meth->flags & DSA_FLAG_FIPS_METHOD) + && !(dsa->flags & DSA_FLAG_NON_FIPS_ALLOW)) { + DSAerr(DSA_F_DSA_GENERATE_KEY, DSA_R_NON_FIPS_DSA_METHOD); + return 0; + } +# endif + if (dsa->meth->dsa_keygen) + return dsa->meth->dsa_keygen(dsa); +# ifdef OPENSSL_FIPS + if (FIPS_mode()) + return FIPS_dsa_generate_key(dsa); +# endif + return dsa_builtin_keygen(dsa); +} + +static int dsa_builtin_keygen(DSA *dsa) +{ + int ok = 0; + BN_CTX *ctx = NULL; + BIGNUM *pub_key = NULL, *priv_key = NULL; + + if ((ctx = BN_CTX_new()) == NULL) + goto err; + + if (dsa->priv_key == NULL) { + if ((priv_key = BN_new()) == NULL) + goto err; + } else + priv_key = dsa->priv_key; + + do + if (!BN_rand_range(priv_key, dsa->q)) + goto err; + while (BN_is_zero(priv_key)) ; + + if (dsa->pub_key == NULL) { + if ((pub_key = BN_new()) == NULL) + goto err; + } else + pub_key = dsa->pub_key; + + { + BIGNUM local_prk; + BIGNUM *prk; + + if ((dsa->flags & DSA_FLAG_NO_EXP_CONSTTIME) == 0) { + BN_init(&local_prk); + prk = &local_prk; + BN_with_flags(prk, priv_key, BN_FLG_CONSTTIME); + } else + prk = priv_key; + + if (!BN_mod_exp(pub_key, dsa->g, prk, dsa->p, ctx)) + goto err; + } + + dsa->priv_key = priv_key; + dsa->pub_key = pub_key; + ok = 1; + + err: + if ((pub_key != NULL) && (dsa->pub_key == NULL)) + BN_free(pub_key); + if ((priv_key != NULL) && (dsa->priv_key == NULL)) + BN_free(priv_key); + if (ctx != NULL) + BN_CTX_free(ctx); + return (ok); +} +#endif