From 15272ab4ed1e6250412fccd48200ed9eae59608f Mon Sep 17 00:00:00 2001 From: marha Date: Mon, 29 Mar 2010 17:08:02 +0000 Subject: Updated to openssl 1.0.0 --- openssl/crypto/dsa/dsa_gen.c | 124 +++++++++++++++++++++++++------------------ 1 file changed, 72 insertions(+), 52 deletions(-) (limited to 'openssl/crypto/dsa/dsa_gen.c') diff --git a/openssl/crypto/dsa/dsa_gen.c b/openssl/crypto/dsa/dsa_gen.c index 6f1728e3c..0fcd25f8b 100644 --- a/openssl/crypto/dsa/dsa_gen.c +++ b/openssl/crypto/dsa/dsa_gen.c @@ -74,69 +74,88 @@ #ifndef OPENSSL_NO_SHA #include -#include #include "cryptlib.h" #include #include -#include #include #include - -#ifndef OPENSSL_FIPS - -static int dsa_builtin_paramgen(DSA *ret, int bits, - unsigned char *seed_in, int seed_len, - int *counter_ret, unsigned long *h_ret, BN_GENCB *cb); +#include "dsa_locl.h" int DSA_generate_parameters_ex(DSA *ret, int bits, - unsigned char *seed_in, int seed_len, + const unsigned char *seed_in, int seed_len, int *counter_ret, unsigned long *h_ret, BN_GENCB *cb) { if(ret->meth->dsa_paramgen) return ret->meth->dsa_paramgen(ret, bits, seed_in, seed_len, counter_ret, h_ret, cb); - return dsa_builtin_paramgen(ret, bits, seed_in, seed_len, - counter_ret, h_ret, cb); + else + { + const EVP_MD *evpmd; + size_t qbits = bits >= 2048 ? 256 : 160; + + if (bits >= 2048) + { + qbits = 256; + evpmd = EVP_sha256(); + } + else + { + qbits = 160; + evpmd = EVP_sha1(); + } + + return dsa_builtin_paramgen(ret, bits, qbits, evpmd, + seed_in, seed_len, counter_ret, h_ret, cb); + } } -static int dsa_builtin_paramgen(DSA *ret, int bits, - unsigned char *seed_in, int seed_len, - int *counter_ret, unsigned long *h_ret, BN_GENCB *cb) +int dsa_builtin_paramgen(DSA *ret, size_t bits, size_t qbits, + const EVP_MD *evpmd, const unsigned char *seed_in, size_t seed_len, + int *counter_ret, unsigned long *h_ret, BN_GENCB *cb) { int ok=0; - unsigned char seed[SHA_DIGEST_LENGTH]; - unsigned char md[SHA_DIGEST_LENGTH]; - unsigned char buf[SHA_DIGEST_LENGTH],buf2[SHA_DIGEST_LENGTH]; + unsigned char seed[SHA256_DIGEST_LENGTH]; + unsigned char md[SHA256_DIGEST_LENGTH]; + unsigned char buf[SHA256_DIGEST_LENGTH],buf2[SHA256_DIGEST_LENGTH]; BIGNUM *r0,*W,*X,*c,*test; BIGNUM *g=NULL,*q=NULL,*p=NULL; BN_MONT_CTX *mont=NULL; - int k,n=0,i,b,m=0; + int i, k,n=0,b,m=0, qsize = qbits >> 3; int counter=0; int r=0; BN_CTX *ctx=NULL; unsigned int h=2; - if (bits < 512) bits=512; - bits=(bits+63)/64*64; + if (qsize != SHA_DIGEST_LENGTH && qsize != SHA224_DIGEST_LENGTH && + qsize != SHA256_DIGEST_LENGTH) + /* invalid q size */ + return 0; + + if (evpmd == NULL) + /* use SHA1 as default */ + evpmd = EVP_sha1(); + + if (bits < 512) + bits = 512; + + bits = (bits+63)/64*64; /* NB: seed_len == 0 is special case: copy generated seed to * seed_in if it is not NULL. */ - if (seed_len && (seed_len < 20)) - seed_in = NULL; /* seed buffer too small -- ignore */ - if (seed_len > 20) - seed_len = 20; /* App. 2.2 of FIPS PUB 186 allows larger SEED, - * but our internal buffers are restricted to 160 bits*/ - if ((seed_in != NULL) && (seed_len == 20)) - { - memcpy(seed,seed_in,seed_len); - /* set seed_in to NULL to avoid it being copied back */ - seed_in = NULL; - } - - if ((ctx=BN_CTX_new()) == NULL) goto err; + if (seed_len && (seed_len < (size_t)qsize)) + seed_in = NULL; /* seed buffer too small -- ignore */ + if (seed_len > (size_t)qsize) + seed_len = qsize; /* App. 2.2 of FIPS PUB 186 allows larger SEED, + * but our internal buffers are restricted to 160 bits*/ + if (seed_in != NULL) + memcpy(seed, seed_in, seed_len); + + if ((ctx=BN_CTX_new()) == NULL) + goto err; - if ((mont=BN_MONT_CTX_new()) == NULL) goto err; + if ((mont=BN_MONT_CTX_new()) == NULL) + goto err; BN_CTX_start(ctx); r0 = BN_CTX_get(ctx); @@ -163,7 +182,7 @@ static int dsa_builtin_paramgen(DSA *ret, int bits, if (!seed_len) { - RAND_pseudo_bytes(seed,SHA_DIGEST_LENGTH); + RAND_pseudo_bytes(seed, qsize); seed_is_random = 1; } else @@ -171,25 +190,27 @@ static int dsa_builtin_paramgen(DSA *ret, int bits, seed_is_random = 0; seed_len=0; /* use random seed if 'seed_in' turns out to be bad*/ } - memcpy(buf,seed,SHA_DIGEST_LENGTH); - memcpy(buf2,seed,SHA_DIGEST_LENGTH); + memcpy(buf , seed, qsize); + memcpy(buf2, seed, qsize); /* precompute "SEED + 1" for step 7: */ - for (i=SHA_DIGEST_LENGTH-1; i >= 0; i--) + for (i = qsize-1; i >= 0; i--) { buf[i]++; - if (buf[i] != 0) break; + if (buf[i] != 0) + break; } /* step 2 */ - EVP_Digest(seed,SHA_DIGEST_LENGTH,md,NULL,HASH, NULL); - EVP_Digest(buf,SHA_DIGEST_LENGTH,buf2,NULL,HASH, NULL); - for (i=0; i= 0; i--) + for (i = qsize-1; i >= 0; i--) { buf[i]++; - if (buf[i] != 0) break; + if (buf[i] != 0) + break; } - EVP_Digest(buf,SHA_DIGEST_LENGTH,md,NULL,HASH, NULL); + EVP_Digest(buf, qsize, md ,NULL, evpmd, NULL); /* step 8 */ - if (!BN_bin2bn(md,SHA_DIGEST_LENGTH,r0)) + if (!BN_bin2bn(md, qsize, r0)) goto err; - if (!BN_lshift(r0,r0,160*k)) goto err; + if (!BN_lshift(r0,r0,(qsize << 3)*k)) goto err; if (!BN_add(W,W,r0)) goto err; } @@ -309,7 +331,6 @@ err: ok=0; goto err; } - if (seed_in != NULL) memcpy(seed_in,seed,20); if (counter_ret != NULL) *counter_ret=counter; if (h_ret != NULL) *h_ret=h; } @@ -322,4 +343,3 @@ err: return ok; } #endif -#endif -- cgit v1.2.3