/* crypto/dsa/dsa_sign.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.] */ /* Original version from Steven Schoch <schoch@sheba.arc.nasa.gov> */ #include "cryptlib.h" #include <openssl/dsa.h> #include <openssl/rand.h> #include <openssl/bn.h> DSA_SIG * DSA_do_sign(const unsigned char *dgst, int dlen, 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_DO_SIGN, DSA_R_NON_FIPS_DSA_METHOD); return NULL; } #endif return dsa->meth->dsa_do_sign(dgst, dlen, dsa); } int DSA_sign_setup(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp) { #ifdef OPENSSL_FIPS if (FIPS_mode() && !(dsa->meth->flags & DSA_FLAG_FIPS_METHOD) && !(dsa->flags & DSA_FLAG_NON_FIPS_ALLOW)) { DSAerr(DSA_F_DSA_SIGN_SETUP, DSA_R_NON_FIPS_DSA_METHOD); return 0; } #endif if (dsa->flags & DSA_FLAG_NONCE_FROM_HASH) { /* You cannot precompute the DSA nonce if it is required to * depend on the message. */ DSAerr(DSA_F_DSA_SIGN_SETUP, DSA_R_NONCE_CANNOT_BE_PRECOMPUTED); return 0; } return dsa->meth->dsa_sign_setup(dsa, ctx_in, kinvp, rp, NULL, 0); } DSA_SIG *DSA_SIG_new(void) { DSA_SIG *sig; sig = OPENSSL_malloc(sizeof(DSA_SIG)); if (!sig) return NULL; sig->r = NULL; sig->s = NULL; return sig; } void DSA_SIG_free(DSA_SIG *sig) { if (sig) { if (sig->r) BN_free(sig->r); if (sig->s) BN_free(sig->s); OPENSSL_free(sig); } }