X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=crypto%2Fdsa%2Fdsa_vrf.c;h=21f98cd94e5c14588c3c45fc241c75a0a6fe0cf7;hb=edfd50d8db3ae20c1cba1667f861a25cbe6c31f2;hp=a217f8631ce89d83c09efe4562b43e31cf413e7b;hpb=b7896b3cb86d80206af14a14d69b0717786f2729;p=oweals%2Fopenssl.git diff --git a/crypto/dsa/dsa_vrf.c b/crypto/dsa/dsa_vrf.c index a217f8631c..21f98cd94e 100644 --- a/crypto/dsa/dsa_vrf.c +++ b/crypto/dsa/dsa_vrf.c @@ -1,152 +1,17 @@ -/* crypto/dsa/dsa_vrf.c */ -/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com) - * All rights reserved. +/* + * Copyright 1995-2016 The OpenSSL Project Authors. 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.] + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html */ -/* Origional version from Steven Schoch */ +#include "internal/cryptlib.h" +#include "dsa_locl.h" -#include -#include "cryptlib.h" -#include "bn.h" -#include "dsa.h" -#include "rand.h" -#include "asn1.h" -#include "asn1_mac.h" - -/* data has already been hashed (probably with SHA or SHA-1). */ -/* returns - * 1: correct signature - * 0: incorrect signature - * -1: error - */ -int DSA_verify(type,dgst,dgst_len,sigbuf,siglen, dsa) -int type; -unsigned char *dgst; -int dgst_len; -unsigned char *sigbuf; -int siglen; -DSA *dsa; - { - /* The next 3 are used by the M_ASN1 macros */ - long length=siglen; - ASN1_CTX c; - unsigned char **pp= &sigbuf; - BN_CTX *ctx; - BIGNUM *r=NULL; - BIGNUM *t1=NULL,*t2=NULL; - BIGNUM *u1=NULL,*u2=NULL; - ASN1_INTEGER *bs=NULL; - int ret = -1; - - ctx=BN_CTX_new(); - if (ctx == NULL) goto err; - - t1=BN_new(); - t2=BN_new(); - if (t1 == NULL || t2 == NULL) goto err; - - M_ASN1_D2I_Init(); - M_ASN1_D2I_start_sequence(); - M_ASN1_D2I_get(bs,d2i_ASN1_INTEGER); - if ((r=BN_bin2bn(bs->data,bs->length,NULL)) == NULL) goto err_bn; - M_ASN1_D2I_get(bs,d2i_ASN1_INTEGER); - if ((u1=BN_bin2bn(bs->data,bs->length,NULL)) == NULL) goto err_bn; - if (!asn1_Finish(&c)) goto err; - - /* Calculate W = inv(S) mod Q - * save W in u2 */ - if ((u2=BN_mod_inverse(u1,dsa->q,ctx)) == NULL) goto err_bn; - - /* save M in u1 */ - if (BN_bin2bn(dgst,dgst_len,u1) == NULL) goto err_bn; - - /* u1 = M * w mod q */ - if (!BN_mod_mul(u1,u1,u2,dsa->q,ctx)) goto err_bn; - - /* u2 = r * w mod q */ - if (!BN_mod_mul(u2,r,u2,dsa->q,ctx)) goto err_bn; - - /* v = ( g^u1 * y^u2 mod p ) mod q */ - /* let t1 = g ^ u1 mod p */ - if (!BN_mod_exp(t1,dsa->g,u1,dsa->p,ctx)) goto err_bn; - /* let t2 = y ^ u2 mod p */ - if (!BN_mod_exp(t2,dsa->pub_key,u2,dsa->p,ctx)) goto err_bn; - /* let u1 = t1 * t2 mod p */ - if (!BN_mod_mul(u1,t1,t2,dsa->p,ctx)) goto err_bn; - /* let u1 = u1 mod q */ - if (!BN_mod(u1,u1,dsa->q,ctx)) goto err_bn; - /* V is now in u1. If the signature is correct, it will be - * equal to R. */ - ret=(BN_ucmp(u1, r) == 0); - if (0) - { -err: /* ASN1 error */ - DSAerr(DSA_F_DSA_VERIFY,c.error); - } - if (0) - { -err_bn: /* BN error */ - DSAerr(DSA_F_DSA_VERIFY,ERR_R_BN_LIB); - } - if (ctx != NULL) BN_CTX_free(ctx); - if (r != NULL) BN_free(r); - if (t1 != NULL) BN_free(t1); - if (t2 != NULL) BN_free(t2); - if (u1 != NULL) BN_free(u1); - if (u2 != NULL) BN_free(u2); - if (bs != NULL) ASN1_BIT_STRING_free(bs); - return(ret); - } +int DSA_do_verify(const unsigned char *dgst, int dgst_len, DSA_SIG *sig, + DSA *dsa) +{ + return dsa->meth->dsa_do_verify(dgst, dgst_len, sig, dsa); +}