Index: openssl/fips/dsa/fips_dsa_ossl.c |
=================================================================== |
--- openssl/fips/dsa/fips_dsa_ossl.c (revision 105093) |
+++ openssl/fips/dsa/fips_dsa_ossl.c (working copy) |
@@ -1,435 +0,0 @@ |
-/* crypto/dsa/dsa_ossl.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 <stdio.h> |
-#include <openssl/bn.h> |
-#include <openssl/dsa.h> |
-#include <openssl/rand.h> |
-#include <openssl/asn1.h> |
-#include <openssl/err.h> |
-#ifndef OPENSSL_NO_ENGINE |
-#include <openssl/engine.h> |
-#endif |
-#include <openssl/fips.h> |
- |
-#ifdef OPENSSL_FIPS |
- |
-static DSA_SIG *dsa_do_sign(const unsigned char *dgst, FIPS_DSA_SIZE_T dlen, DSA *dsa); |
-static int dsa_sign_setup(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp); |
-static int dsa_do_verify(const unsigned char *dgst, FIPS_DSA_SIZE_T dgst_len, DSA_SIG *sig, |
- DSA *dsa); |
-static int dsa_init(DSA *dsa); |
-static int dsa_finish(DSA *dsa); |
-static int dsa_mod_exp(DSA *dsa, BIGNUM *rr, BIGNUM *a1, BIGNUM *p1, |
- BIGNUM *a2, BIGNUM *p2, BIGNUM *m, BN_CTX *ctx, |
- BN_MONT_CTX *in_mont); |
-static int dsa_bn_mod_exp(DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p, |
- const BIGNUM *m, BN_CTX *ctx, |
- BN_MONT_CTX *m_ctx); |
- |
-static const DSA_METHOD openssl_dsa_meth = { |
-"OpenSSL FIPS DSA method", |
-dsa_do_sign, |
-dsa_sign_setup, |
-dsa_do_verify, |
-dsa_mod_exp, |
-dsa_bn_mod_exp, |
-dsa_init, |
-dsa_finish, |
-DSA_FLAG_FIPS_METHOD, |
-NULL |
-}; |
-#if 0 |
-int FIPS_dsa_check(struct dsa_st *dsa) |
- { |
- if(dsa->meth != &openssl_dsa_meth || dsa->meth->dsa_do_sign != dsa_do_sign |
- || dsa->meth->dsa_sign_setup != dsa_sign_setup |
- || dsa->meth->dsa_mod_exp != dsa_mod_exp |
- || dsa->meth->bn_mod_exp != dsa_bn_mod_exp |
- || dsa->meth->init != dsa_init |
- || dsa->meth->finish != dsa_finish) |
- { |
- FIPSerr(FIPS_F_FIPS_DSA_CHECK,FIPS_R_NON_FIPS_METHOD); |
- return 0; |
- } |
- return 1; |
- } |
-#endif |
- |
-const DSA_METHOD *DSA_OpenSSL(void) |
-{ |
- return &openssl_dsa_meth; |
-} |
- |
-static DSA_SIG *dsa_do_sign(const unsigned char *dgst, FIPS_DSA_SIZE_T dlen, DSA *dsa) |
- { |
- BIGNUM *kinv=NULL,*r=NULL,*s=NULL; |
- BIGNUM m; |
- BIGNUM xr; |
- BN_CTX *ctx=NULL; |
- int i,reason=ERR_R_BN_LIB; |
- DSA_SIG *ret=NULL; |
- |
- if(FIPS_selftest_failed()) |
- { |
- FIPSerr(FIPS_F_DSA_DO_SIGN,FIPS_R_FIPS_SELFTEST_FAILED); |
- return NULL; |
- } |
- |
- if (FIPS_mode() && (BN_num_bits(dsa->p) < OPENSSL_DSA_FIPS_MIN_MODULUS_BITS)) |
- { |
- DSAerr(DSA_F_DSA_DO_SIGN, DSA_R_KEY_SIZE_TOO_SMALL); |
- return NULL; |
- } |
- |
- BN_init(&m); |
- BN_init(&xr); |
- |
- if (!dsa->p || !dsa->q || !dsa->g) |
- { |
- reason=DSA_R_MISSING_PARAMETERS; |
- goto err; |
- } |
- |
- s=BN_new(); |
- if (s == NULL) goto err; |
- |
- i=BN_num_bytes(dsa->q); /* should be 20 */ |
- if ((dlen > i) || (dlen > 50)) |
- { |
- reason=DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE; |
- goto err; |
- } |
- |
- ctx=BN_CTX_new(); |
- if (ctx == NULL) goto err; |
- |
- if (!dsa->meth->dsa_sign_setup(dsa,ctx,&kinv,&r)) goto err; |
- |
- if (BN_bin2bn(dgst,dlen,&m) == NULL) goto err; |
- |
- /* Compute s = inv(k) (m + xr) mod q */ |
- if (!BN_mod_mul(&xr,dsa->priv_key,r,dsa->q,ctx)) goto err;/* s = xr */ |
- if (!BN_add(s, &xr, &m)) goto err; /* s = m + xr */ |
- if (BN_cmp(s,dsa->q) > 0) |
- BN_sub(s,s,dsa->q); |
- if (!BN_mod_mul(s,s,kinv,dsa->q,ctx)) goto err; |
- |
- ret= DSA_SIG_new(); |
- if (ret == NULL) goto err; |
- ret->r = r; |
- ret->s = s; |
- |
-err: |
- if (!ret) |
- { |
- DSAerr(DSA_F_DSA_DO_SIGN,reason); |
- BN_free(r); |
- BN_free(s); |
- } |
- if (ctx != NULL) BN_CTX_free(ctx); |
- BN_clear_free(&m); |
- BN_clear_free(&xr); |
- if (kinv != NULL) /* dsa->kinv is NULL now if we used it */ |
- BN_clear_free(kinv); |
- return(ret); |
- } |
- |
-static int dsa_sign_setup(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp) |
- { |
- BN_CTX *ctx; |
- BIGNUM k,kq,*K,*kinv=NULL,*r=NULL; |
- int ret=0; |
- |
- if (!dsa->p || !dsa->q || !dsa->g) |
- { |
- DSAerr(DSA_F_DSA_SIGN_SETUP,DSA_R_MISSING_PARAMETERS); |
- return 0; |
- } |
- |
- BN_init(&k); |
- BN_init(&kq); |
- |
- if (ctx_in == NULL) |
- { |
- if ((ctx=BN_CTX_new()) == NULL) goto err; |
- } |
- else |
- ctx=ctx_in; |
- |
- if ((r=BN_new()) == NULL) goto err; |
- |
- /* Get random k */ |
- do |
- if (!BN_rand_range(&k, dsa->q)) goto err; |
- while (BN_is_zero(&k)); |
- if ((dsa->flags & DSA_FLAG_NO_EXP_CONSTTIME) == 0) |
- { |
- BN_set_flags(&k, BN_FLG_CONSTTIME); |
- } |
- |
- if (dsa->flags & DSA_FLAG_CACHE_MONT_P) |
- { |
- if (!BN_MONT_CTX_set_locked((BN_MONT_CTX **)&dsa->method_mont_p, |
- CRYPTO_LOCK_DSA, |
- dsa->p, ctx)) |
- goto err; |
- } |
- |
- /* Compute r = (g^k mod p) mod q */ |
- |
- if ((dsa->flags & DSA_FLAG_NO_EXP_CONSTTIME) == 0) |
- { |
- if (!BN_copy(&kq, &k)) goto err; |
- |
- /* We do not want timing information to leak the length of k, |
- * so we compute g^k using an equivalent exponent of fixed length. |
- * |
- * (This is a kludge that we need because the BN_mod_exp_mont() |
- * does not let us specify the desired timing behaviour.) */ |
- |
- if (!BN_add(&kq, &kq, dsa->q)) goto err; |
- if (BN_num_bits(&kq) <= BN_num_bits(dsa->q)) |
- { |
- if (!BN_add(&kq, &kq, dsa->q)) goto err; |
- } |
- |
- K = &kq; |
- } |
- else |
- { |
- K = &k; |
- } |
- if (!dsa->meth->bn_mod_exp(dsa, r,dsa->g,K,dsa->p,ctx, |
- (BN_MONT_CTX *)dsa->method_mont_p)) goto err; |
- if (!BN_mod(r,r,dsa->q,ctx)) goto err; |
- |
- /* Compute part of 's = inv(k) (m + xr) mod q' */ |
- if ((kinv=BN_mod_inverse(NULL,&k,dsa->q,ctx)) == NULL) goto err; |
- |
- if (*kinvp != NULL) BN_clear_free(*kinvp); |
- *kinvp=kinv; |
- kinv=NULL; |
- if (*rp != NULL) BN_clear_free(*rp); |
- *rp=r; |
- ret=1; |
-err: |
- if (!ret) |
- { |
- DSAerr(DSA_F_DSA_SIGN_SETUP,ERR_R_BN_LIB); |
- if (kinv != NULL) BN_clear_free(kinv); |
- if (r != NULL) BN_clear_free(r); |
- } |
- if (ctx_in == NULL) BN_CTX_free(ctx); |
- if (kinv != NULL) BN_clear_free(kinv); |
- BN_clear_free(&k); |
- BN_clear_free(&kq); |
- return(ret); |
- } |
- |
-static int dsa_do_verify(const unsigned char *dgst, FIPS_DSA_SIZE_T dgst_len, DSA_SIG *sig, |
- DSA *dsa) |
- { |
- BN_CTX *ctx; |
- BIGNUM u1,u2,t1; |
- BN_MONT_CTX *mont=NULL; |
- int ret = -1; |
- |
- if (!dsa->p || !dsa->q || !dsa->g) |
- { |
- DSAerr(DSA_F_DSA_DO_VERIFY,DSA_R_MISSING_PARAMETERS); |
- return -1; |
- } |
- |
- if(FIPS_selftest_failed()) |
- { |
- FIPSerr(FIPS_F_DSA_DO_VERIFY,FIPS_R_FIPS_SELFTEST_FAILED); |
- return -1; |
- } |
- |
- if (BN_num_bits(dsa->q) != 160) |
- { |
- DSAerr(DSA_F_DSA_DO_VERIFY,DSA_R_BAD_Q_VALUE); |
- return -1; |
- } |
- |
- if (BN_num_bits(dsa->p) > OPENSSL_DSA_MAX_MODULUS_BITS) |
- { |
- DSAerr(DSA_F_DSA_DO_VERIFY,DSA_R_MODULUS_TOO_LARGE); |
- return -1; |
- } |
- |
- if (FIPS_mode() && (BN_num_bits(dsa->p) < OPENSSL_DSA_FIPS_MIN_MODULUS_BITS)) |
- { |
- DSAerr(DSA_F_DSA_DO_VERIFY, DSA_R_KEY_SIZE_TOO_SMALL); |
- return -1; |
- } |
- |
- BN_init(&u1); |
- BN_init(&u2); |
- BN_init(&t1); |
- |
- if ((ctx=BN_CTX_new()) == NULL) goto err; |
- |
- if (BN_is_zero(sig->r) || sig->r->neg || BN_ucmp(sig->r, dsa->q) >= 0) |
- { |
- ret = 0; |
- goto err; |
- } |
- if (BN_is_zero(sig->s) || sig->s->neg || BN_ucmp(sig->s, dsa->q) >= 0) |
- { |
- ret = 0; |
- goto err; |
- } |
- |
- /* Calculate W = inv(S) mod Q |
- * save W in u2 */ |
- if ((BN_mod_inverse(&u2,sig->s,dsa->q,ctx)) == NULL) goto err; |
- |
- /* save M in u1 */ |
- if (BN_bin2bn(dgst,dgst_len,&u1) == NULL) goto err; |
- |
- /* u1 = M * w mod q */ |
- if (!BN_mod_mul(&u1,&u1,&u2,dsa->q,ctx)) goto err; |
- |
- /* u2 = r * w mod q */ |
- if (!BN_mod_mul(&u2,sig->r,&u2,dsa->q,ctx)) goto err; |
- |
- |
- if (dsa->flags & DSA_FLAG_CACHE_MONT_P) |
- { |
- mont = BN_MONT_CTX_set_locked( |
- (BN_MONT_CTX **)&dsa->method_mont_p, |
- CRYPTO_LOCK_DSA, dsa->p, ctx); |
- if (!mont) |
- goto err; |
- } |
- |
-#if 0 |
- { |
- BIGNUM t2; |
- |
- BN_init(&t2); |
- /* v = ( g^u1 * y^u2 mod p ) mod q */ |
- /* let t1 = g ^ u1 mod p */ |
- if (!BN_mod_exp_mont(&t1,dsa->g,&u1,dsa->p,ctx,mont)) goto err; |
- /* let t2 = y ^ u2 mod p */ |
- if (!BN_mod_exp_mont(&t2,dsa->pub_key,&u2,dsa->p,ctx,mont)) goto err; |
- /* let u1 = t1 * t2 mod p */ |
- if (!BN_mod_mul(&u1,&t1,&t2,dsa->p,ctx)) goto err_bn; |
- BN_free(&t2); |
- } |
- /* let u1 = u1 mod q */ |
- if (!BN_mod(&u1,&u1,dsa->q,ctx)) goto err; |
-#else |
- { |
- if (!dsa->meth->dsa_mod_exp(dsa, &t1,dsa->g,&u1,dsa->pub_key,&u2, |
- dsa->p,ctx,mont)) goto err; |
- /* BN_copy(&u1,&t1); */ |
- /* let u1 = u1 mod q */ |
- if (!BN_mod(&u1,&t1,dsa->q,ctx)) goto err; |
- } |
-#endif |
- /* V is now in u1. If the signature is correct, it will be |
- * equal to R. */ |
- ret=(BN_ucmp(&u1, sig->r) == 0); |
- |
- err: |
- if (ret != 1) DSAerr(DSA_F_DSA_DO_VERIFY,ERR_R_BN_LIB); |
- if (ctx != NULL) BN_CTX_free(ctx); |
- BN_free(&u1); |
- BN_free(&u2); |
- BN_free(&t1); |
- return(ret); |
- } |
- |
-static int dsa_init(DSA *dsa) |
-{ |
- FIPS_selftest_check(); |
- dsa->flags|=DSA_FLAG_CACHE_MONT_P; |
- return(1); |
-} |
- |
-static int dsa_finish(DSA *dsa) |
-{ |
- if(dsa->method_mont_p) |
- BN_MONT_CTX_free((BN_MONT_CTX *)dsa->method_mont_p); |
- return(1); |
-} |
- |
-static int dsa_mod_exp(DSA *dsa, BIGNUM *rr, BIGNUM *a1, BIGNUM *p1, |
- BIGNUM *a2, BIGNUM *p2, BIGNUM *m, BN_CTX *ctx, |
- BN_MONT_CTX *in_mont) |
-{ |
- return BN_mod_exp2_mont(rr, a1, p1, a2, p2, m, ctx, in_mont); |
-} |
- |
-static int dsa_bn_mod_exp(DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p, |
- const BIGNUM *m, BN_CTX *ctx, |
- BN_MONT_CTX *m_ctx) |
-{ |
- return BN_mod_exp_mont(r, a, p, m, ctx, m_ctx); |
-} |
- |
-#else /* ndef OPENSSL_FIPS */ |
- |
-static void *dummy=&dummy; |
- |
-#endif /* ndef OPENSSL_FIPS */ |