1 /* crypto/dsa/dsa_sign.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh (at) cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay (at) cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh (at) cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 /* Original version from Steven Schoch <schoch (at) sheba.arc.nasa.gov> */ 60 61 #include "cryptlib.h" 62 #include <openssl/dsa.h> 63 #include <openssl/rand.h> 64 #include <openssl/bn.h> 65 66 DSA_SIG * DSA_do_sign(const unsigned char *dgst, int dlen, DSA *dsa) 67 { 68 #ifdef OPENSSL_FIPS 69 if (FIPS_mode() && !(dsa->meth->flags & DSA_FLAG_FIPS_METHOD) 70 && !(dsa->flags & DSA_FLAG_NON_FIPS_ALLOW)) 71 { 72 DSAerr(DSA_F_DSA_DO_SIGN, DSA_R_NON_FIPS_DSA_METHOD); 73 return NULL; 74 } 75 #endif 76 return dsa->meth->dsa_do_sign(dgst, dlen, dsa); 77 } 78 79 int DSA_sign_setup(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp) 80 { 81 #ifdef OPENSSL_FIPS 82 if (FIPS_mode() && !(dsa->meth->flags & DSA_FLAG_FIPS_METHOD) 83 && !(dsa->flags & DSA_FLAG_NON_FIPS_ALLOW)) 84 { 85 DSAerr(DSA_F_DSA_SIGN_SETUP, DSA_R_NON_FIPS_DSA_METHOD); 86 return 0; 87 } 88 #endif 89 return dsa->meth->dsa_sign_setup(dsa, ctx_in, kinvp, rp); 90 } 91 92 DSA_SIG *DSA_SIG_new(void) 93 { 94 DSA_SIG *sig; 95 sig = OPENSSL_malloc(sizeof(DSA_SIG)); 96 if (!sig) 97 return NULL; 98 sig->r = NULL; 99 sig->s = NULL; 100 return sig; 101 } 102 103 void DSA_SIG_free(DSA_SIG *sig) 104 { 105 if (sig) 106 { 107 if (sig->r) 108 BN_free(sig->r); 109 if (sig->s) 110 BN_free(sig->s); 111 OPENSSL_free(sig); 112 } 113 } 114 115
