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author | marha <marha@users.sourceforge.net> | 2015-02-22 21:39:56 +0100 |
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committer | marha <marha@users.sourceforge.net> | 2015-02-22 21:39:56 +0100 |
commit | 462f18c7b25fe3e467f837647d07ab0a78aa8d2b (patch) | |
tree | fc8013c0a1bac05a1945846c1697e973f4c35013 /openssl/crypto/dh/dh_gen.c | |
parent | 36f711ee12b6dd5184198abed3aa551efb585587 (diff) | |
download | vcxsrv-462f18c7b25fe3e467f837647d07ab0a78aa8d2b.tar.gz vcxsrv-462f18c7b25fe3e467f837647d07ab0a78aa8d2b.tar.bz2 vcxsrv-462f18c7b25fe3e467f837647d07ab0a78aa8d2b.zip |
Merged origin/release (checked in because wanted to merge new stuff)
Diffstat (limited to 'openssl/crypto/dh/dh_gen.c')
-rw-r--r-- | openssl/crypto/dh/dh_gen.c | 206 |
1 files changed, 109 insertions, 97 deletions
diff --git a/openssl/crypto/dh/dh_gen.c b/openssl/crypto/dh/dh_gen.c index 7b1fe9c9c..5bedb665f 100644 --- a/openssl/crypto/dh/dh_gen.c +++ b/openssl/crypto/dh/dh_gen.c @@ -5,21 +5,21 @@ * 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: @@ -34,10 +34,10 @@ * 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 + * 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 @@ -49,16 +49,16 @@ * 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.] */ -/* NB: These functions have been upgraded - the previous prototypes are in - * dh_depr.c as wrappers to these ones. - * - Geoff +/* + * NB: These functions have been upgraded - the previous prototypes are in + * dh_depr.c as wrappers to these ones. - Geoff */ #include <stdio.h> @@ -67,32 +67,33 @@ #include <openssl/dh.h> #ifdef OPENSSL_FIPS -#include <openssl/fips.h> +# include <openssl/fips.h> #endif -static int dh_builtin_genparams(DH *ret, int prime_len, int generator, BN_GENCB *cb); +static int dh_builtin_genparams(DH *ret, int prime_len, int generator, + BN_GENCB *cb); -int DH_generate_parameters_ex(DH *ret, int prime_len, int generator, BN_GENCB *cb) - { +int DH_generate_parameters_ex(DH *ret, int prime_len, int generator, + BN_GENCB *cb) +{ #ifdef OPENSSL_FIPS - if (FIPS_mode() && !(ret->meth->flags & DH_FLAG_FIPS_METHOD) - && !(ret->flags & DH_FLAG_NON_FIPS_ALLOW)) - { - DHerr(DH_F_DH_GENERATE_PARAMETERS_EX, DH_R_NON_FIPS_METHOD); - return 0; - } + if (FIPS_mode() && !(ret->meth->flags & DH_FLAG_FIPS_METHOD) + && !(ret->flags & DH_FLAG_NON_FIPS_ALLOW)) { + DHerr(DH_F_DH_GENERATE_PARAMETERS_EX, DH_R_NON_FIPS_METHOD); + return 0; + } #endif - if(ret->meth->generate_params) - return ret->meth->generate_params(ret, prime_len, generator, cb); + if (ret->meth->generate_params) + return ret->meth->generate_params(ret, prime_len, generator, cb); #ifdef OPENSSL_FIPS - if (FIPS_mode()) - return FIPS_dh_generate_parameters_ex(ret, prime_len, - generator, cb); + if (FIPS_mode()) + return FIPS_dh_generate_parameters_ex(ret, prime_len, generator, cb); #endif - return dh_builtin_genparams(ret, prime_len, generator, cb); - } + return dh_builtin_genparams(ret, prime_len, generator, cb); +} -/* We generate DH parameters as follows +/*- + * We generate DH parameters as follows * find a prime q which is prime_len/2 bits long. * p=(2*q)+1 or (p-1)/2 = q * For this case, g is a generator if @@ -113,80 +114,91 @@ int DH_generate_parameters_ex(DH *ret, int prime_len, int generator, BN_GENCB *c * Since DH should be using a safe prime (both p and q are prime), * this generator function can take a very very long time to run. */ -/* Actually there is no reason to insist that 'generator' be a generator. +/* + * Actually there is no reason to insist that 'generator' be a generator. * It's just as OK (and in some sense better) to use a generator of the * order-q subgroup. */ -static int dh_builtin_genparams(DH *ret, int prime_len, int generator, BN_GENCB *cb) - { - BIGNUM *t1,*t2; - int g,ok= -1; - BN_CTX *ctx=NULL; +static int dh_builtin_genparams(DH *ret, int prime_len, int generator, + BN_GENCB *cb) +{ + BIGNUM *t1, *t2; + int g, ok = -1; + BN_CTX *ctx = NULL; + + ctx = BN_CTX_new(); + if (ctx == NULL) + goto err; + BN_CTX_start(ctx); + t1 = BN_CTX_get(ctx); + t2 = BN_CTX_get(ctx); + if (t1 == NULL || t2 == NULL) + goto err; - ctx=BN_CTX_new(); - if (ctx == NULL) goto err; - BN_CTX_start(ctx); - t1 = BN_CTX_get(ctx); - t2 = BN_CTX_get(ctx); - if (t1 == NULL || t2 == NULL) goto err; + /* Make sure 'ret' has the necessary elements */ + if (!ret->p && ((ret->p = BN_new()) == NULL)) + goto err; + if (!ret->g && ((ret->g = BN_new()) == NULL)) + goto err; - /* Make sure 'ret' has the necessary elements */ - if(!ret->p && ((ret->p = BN_new()) == NULL)) goto err; - if(!ret->g && ((ret->g = BN_new()) == NULL)) goto err; - - if (generator <= 1) - { - DHerr(DH_F_DH_BUILTIN_GENPARAMS, DH_R_BAD_GENERATOR); - goto err; - } - if (generator == DH_GENERATOR_2) - { - if (!BN_set_word(t1,24)) goto err; - if (!BN_set_word(t2,11)) goto err; - g=2; - } -#if 0 /* does not work for safe primes */ - else if (generator == DH_GENERATOR_3) - { - if (!BN_set_word(t1,12)) goto err; - if (!BN_set_word(t2,5)) goto err; - g=3; - } + if (generator <= 1) { + DHerr(DH_F_DH_BUILTIN_GENPARAMS, DH_R_BAD_GENERATOR); + goto err; + } + if (generator == DH_GENERATOR_2) { + if (!BN_set_word(t1, 24)) + goto err; + if (!BN_set_word(t2, 11)) + goto err; + g = 2; + } +#if 0 /* does not work for safe primes */ + else if (generator == DH_GENERATOR_3) { + if (!BN_set_word(t1, 12)) + goto err; + if (!BN_set_word(t2, 5)) + goto err; + g = 3; + } #endif - else if (generator == DH_GENERATOR_5) - { - if (!BN_set_word(t1,10)) goto err; - if (!BN_set_word(t2,3)) goto err; - /* BN_set_word(t3,7); just have to miss - * out on these ones :-( */ - g=5; - } - else - { - /* in the general case, don't worry if 'generator' is a - * generator or not: since we are using safe primes, - * it will generate either an order-q or an order-2q group, - * which both is OK */ - if (!BN_set_word(t1,2)) goto err; - if (!BN_set_word(t2,1)) goto err; - g=generator; - } - - if(!BN_generate_prime_ex(ret->p,prime_len,1,t1,t2,cb)) goto err; - if(!BN_GENCB_call(cb, 3, 0)) goto err; - if (!BN_set_word(ret->g,g)) goto err; - ok=1; -err: - if (ok == -1) - { - DHerr(DH_F_DH_BUILTIN_GENPARAMS,ERR_R_BN_LIB); - ok=0; - } + else if (generator == DH_GENERATOR_5) { + if (!BN_set_word(t1, 10)) + goto err; + if (!BN_set_word(t2, 3)) + goto err; + /* + * BN_set_word(t3,7); just have to miss out on these ones :-( + */ + g = 5; + } else { + /* + * in the general case, don't worry if 'generator' is a generator or + * not: since we are using safe primes, it will generate either an + * order-q or an order-2q group, which both is OK + */ + if (!BN_set_word(t1, 2)) + goto err; + if (!BN_set_word(t2, 1)) + goto err; + g = generator; + } + + if (!BN_generate_prime_ex(ret->p, prime_len, 1, t1, t2, cb)) + goto err; + if (!BN_GENCB_call(cb, 3, 0)) + goto err; + if (!BN_set_word(ret->g, g)) + goto err; + ok = 1; + err: + if (ok == -1) { + DHerr(DH_F_DH_BUILTIN_GENPARAMS, ERR_R_BN_LIB); + ok = 0; + } - if (ctx != NULL) - { - BN_CTX_end(ctx); - BN_CTX_free(ctx); - } - return ok; - } + if (ctx != NULL) { + BN_CTX_end(ctx); + BN_CTX_free(ctx); + } + return ok; +} |