From 15b5d84f9da2ce4bfae8580e56e34a859f74ad71 Mon Sep 17 00:00:00 2001 From: markus <> Date: Thu, 5 Sep 2002 12:51:50 +0000 Subject: import openssl-0.9.7-beta1 --- src/lib/libcrypto/dh/dh.h | 131 ++++++++++++++++++++++----------- src/lib/libcrypto/dh/dh_check.c | 18 ++--- src/lib/libcrypto/dh/dh_err.c | 126 ++++++++++++++++--------------- src/lib/libcrypto/dh/dh_gen.c | 63 ++++++++++------ src/lib/libcrypto/dh/dh_key.c | 131 ++++++++++++++++++++++++++------- src/lib/libcrypto/dh/dh_lib.c | 159 +++++++++++++++++++++++++++++++++++++--- 6 files changed, 457 insertions(+), 171 deletions(-) (limited to 'src/lib/libcrypto/dh') diff --git a/src/lib/libcrypto/dh/dh.h b/src/lib/libcrypto/dh/dh.h index 4cc1df2650..05851f8429 100644 --- a/src/lib/libcrypto/dh/dh.h +++ b/src/lib/libcrypto/dh/dh.h @@ -59,15 +59,41 @@ #ifndef HEADER_DH_H #define HEADER_DH_H +#ifdef OPENSSL_NO_DH +#error DH is disabled. +#endif + +#ifndef OPENSSL_NO_BIO +#include +#endif +#include +#include +#include + +#define DH_FLAG_CACHE_MONT_P 0x01 + #ifdef __cplusplus extern "C" { #endif -#ifndef HEADER_BN_H -#define BIGNUM char -#endif +typedef struct dh_st DH; + +typedef struct dh_method { + const char *name; + /* Methods here */ + int (*generate_key)(DH *dh); + int (*compute_key)(unsigned char *key,const BIGNUM *pub_key,DH *dh); + int (*bn_mod_exp)(const DH *dh, BIGNUM *r, const BIGNUM *a, + const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, + BN_MONT_CTX *m_ctx); /* Can be null */ + + int (*init)(DH *dh); + int (*finish)(DH *dh); + int flags; + char *app_data; +} DH_METHOD; -typedef struct dh_st +struct dh_st { /* This first argument is used to pick up errors when * a DH is passed instead of a EVP_PKEY */ @@ -75,10 +101,24 @@ typedef struct dh_st int version; BIGNUM *p; BIGNUM *g; - int length; /* optional */ - BIGNUM *pub_key; /* y */ + long length; /* optional */ + BIGNUM *pub_key; /* g^x */ BIGNUM *priv_key; /* x */ - } DH; + + int flags; + char *method_mont_p; + /* Place holders if we want to do X9.42 DH */ + BIGNUM *q; + BIGNUM *j; + unsigned char *seed; + int seedlen; + BIGNUM *counter; + + int references; + CRYPTO_EX_DATA ex_data; + const DH_METHOD *meth; + ENGINE *engine; + }; #define DH_GENERATOR_2 2 /* #define DH_GENERATOR_3 3 */ @@ -86,10 +126,14 @@ typedef struct dh_st /* DH_check error codes */ #define DH_CHECK_P_NOT_PRIME 0x01 -#define DH_CHECK_P_NOT_STRONG_PRIME 0x02 +#define DH_CHECK_P_NOT_SAFE_PRIME 0x02 #define DH_UNABLE_TO_CHECK_GENERATOR 0x04 #define DH_NOT_SUITABLE_GENERATOR 0x08 +/* primes p where (p-1)/2 is prime too are called "safe"; we define + this for backward compatibility: */ +#define DH_CHECK_P_NOT_STRONG_PRIME DH_CHECK_P_NOT_SAFE_PRIME + #define DHparams_dup(x) (DH *)ASN1_dup((int (*)())i2d_DHparams, \ (char *(*)())d2i_DHparams,(char *)(x)) #define d2i_DHparams_fp(fp,x) (DH *)ASN1_d2i_fp((char *(*)())DH_new, \ @@ -98,50 +142,51 @@ typedef struct dh_st (unsigned char *)(x)) #define d2i_DHparams_bio(bp,x) (DH *)ASN1_d2i_bio((char *(*)())DH_new, \ (char *(*)())d2i_DHparams,(bp),(unsigned char **)(x)) +#ifdef __cplusplus +#define i2d_DHparams_bio(bp,x) ASN1_i2d_bio((int (*)())i2d_DHparams,(bp), \ + (unsigned char *)(x)) +#else #define i2d_DHparams_bio(bp,x) ASN1_i2d_bio(i2d_DHparams,(bp), \ (unsigned char *)(x)) +#endif + +const DH_METHOD *DH_OpenSSL(void); + +void DH_set_default_method(const DH_METHOD *meth); +const DH_METHOD *DH_get_default_method(void); +int DH_set_method(DH *dh, const DH_METHOD *meth); +DH *DH_new_method(ENGINE *engine); -#ifndef NOPROTO DH * DH_new(void); void DH_free(DH *dh); -int DH_size(DH *dh); +int DH_up_ref(DH *dh); +int DH_size(const DH *dh); +int DH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, + CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func); +int DH_set_ex_data(DH *d, int idx, void *arg); +void *DH_get_ex_data(DH *d, int idx); DH * DH_generate_parameters(int prime_len,int generator, - void (*callback)(int,int,char *),char *cb_arg); -int DH_check(DH *dh,int *codes); + void (*callback)(int,int,void *),void *cb_arg); +int DH_check(const DH *dh,int *codes); int DH_generate_key(DH *dh); -int DH_compute_key(unsigned char *key,BIGNUM *pub_key,DH *dh); -DH * d2i_DHparams(DH **a,unsigned char **pp, long length); -int i2d_DHparams(DH *a,unsigned char **pp); -#ifndef NO_FP_API -int DHparams_print_fp(FILE *fp, DH *x); +int DH_compute_key(unsigned char *key,const BIGNUM *pub_key,DH *dh); +DH * d2i_DHparams(DH **a,const unsigned char **pp, long length); +int i2d_DHparams(const DH *a,unsigned char **pp); +#ifndef OPENSSL_NO_FP_API +int DHparams_print_fp(FILE *fp, const DH *x); #endif -#ifdef HEADER_BIO_H -int DHparams_print(BIO *bp, DH *x); +#ifndef OPENSSL_NO_BIO +int DHparams_print(BIO *bp, const DH *x); #else -int DHparams_print(char *bp, DH *x); -#endif -void ERR_load_DH_strings(void ); - -#else - -DH * DH_new(); -void DH_free(); -int DH_size(); -DH * DH_generate_parameters(); -int DH_check(); -int DH_generate_key(); -int DH_compute_key(); -DH * d2i_DHparams(); -int i2d_DHparams(); -#ifndef NO_FP_API -int DHparams_print_fp(); -#endif -int DHparams_print(); -void ERR_load_DH_strings(); - +int DHparams_print(char *bp, const DH *x); #endif /* BEGIN ERROR CODES */ +/* The following lines are auto generated by the script mkerr.pl. Any changes + * made after this point may be overwritten when the script is next run. + */ +void ERR_load_DH_strings(void); + /* Error codes for the DH functions. */ /* Function codes. */ @@ -150,13 +195,13 @@ void ERR_load_DH_strings(); #define DH_F_DH_COMPUTE_KEY 102 #define DH_F_DH_GENERATE_KEY 103 #define DH_F_DH_GENERATE_PARAMETERS 104 -#define DH_F_DH_NEW 105 +#define DH_F_DH_NEW_METHOD 105 /* Reason codes. */ +#define DH_R_BAD_GENERATOR 101 #define DH_R_NO_PRIVATE_VALUE 100 - + #ifdef __cplusplus } #endif #endif - diff --git a/src/lib/libcrypto/dh/dh_check.c b/src/lib/libcrypto/dh/dh_check.c index 65602e494f..f0373f7d68 100644 --- a/src/lib/libcrypto/dh/dh_check.c +++ b/src/lib/libcrypto/dh/dh_check.c @@ -58,10 +58,10 @@ #include #include "cryptlib.h" -#include "bn.h" -#include "dh.h" +#include +#include -/* Check that p is a strong prime and +/* Check that p is a safe prime and * if g is 2, 3 or 5, check that is is a suitable generator * where * for 2, p mod 24 == 11 @@ -70,9 +70,7 @@ * should hold. */ -int DH_check(dh,ret) -DH *dh; -int *ret; +int DH_check(const DH *dh, int *ret) { int ok=0; BN_CTX *ctx=NULL; @@ -90,11 +88,13 @@ int *ret; l=BN_mod_word(dh->p,24); if (l != 11) *ret|=DH_NOT_SUITABLE_GENERATOR; } -/* else if (BN_is_word(dh->g,DH_GENERATOR_3)) +#if 0 + else if (BN_is_word(dh->g,DH_GENERATOR_3)) { l=BN_mod_word(dh->p,12); if (l != 5) *ret|=DH_NOT_SUITABLE_GENERATOR; - }*/ + } +#endif else if (BN_is_word(dh->g,DH_GENERATOR_5)) { l=BN_mod_word(dh->p,10); @@ -110,7 +110,7 @@ int *ret; { if (!BN_rshift1(q,dh->p)) goto err; if (!BN_is_prime(q,BN_prime_checks,NULL,ctx,NULL)) - *ret|=DH_CHECK_P_NOT_STRONG_PRIME; + *ret|=DH_CHECK_P_NOT_SAFE_PRIME; } ok=1; err: diff --git a/src/lib/libcrypto/dh/dh_err.c b/src/lib/libcrypto/dh/dh_err.c index 9d5c06ac24..d837950aec 100644 --- a/src/lib/libcrypto/dh/dh_err.c +++ b/src/lib/libcrypto/dh/dh_err.c @@ -1,66 +1,69 @@ -/* lib/dh/dh_err.c */ -/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com) - * All rights reserved. +/* crypto/dh/dh_err.c */ +/* ==================================================================== + * Copyright (c) 1999-2002 The OpenSSL Project. 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. + * + * 1. Redistributions of source code must retain the above 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.] + * 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 acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * openssl-core@OpenSSL.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED 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 OpenSSL PROJECT OR + * ITS 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. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * */ + +/* NOTE: this file was auto generated by the mkerr.pl script: any changes + * made to it will be overwritten when the script next updates this file, + * only reason strings will be preserved. + */ + #include -#include "err.h" -#include "dh.h" +#include +#include /* BEGIN ERROR CODES */ -#ifndef NO_ERR +#ifndef OPENSSL_NO_ERR static ERR_STRING_DATA DH_str_functs[]= { {ERR_PACK(0,DH_F_DHPARAMS_PRINT,0), "DHparams_print"}, @@ -68,26 +71,27 @@ static ERR_STRING_DATA DH_str_functs[]= {ERR_PACK(0,DH_F_DH_COMPUTE_KEY,0), "DH_compute_key"}, {ERR_PACK(0,DH_F_DH_GENERATE_KEY,0), "DH_generate_key"}, {ERR_PACK(0,DH_F_DH_GENERATE_PARAMETERS,0), "DH_generate_parameters"}, -{ERR_PACK(0,DH_F_DH_NEW,0), "DH_new"}, -{0,NULL}, +{ERR_PACK(0,DH_F_DH_NEW_METHOD,0), "DH_new_method"}, +{0,NULL} }; static ERR_STRING_DATA DH_str_reasons[]= { +{DH_R_BAD_GENERATOR ,"bad generator"}, {DH_R_NO_PRIVATE_VALUE ,"no private value"}, -{0,NULL}, +{0,NULL} }; #endif -void ERR_load_DH_strings() +void ERR_load_DH_strings(void) { static int init=1; - if (init); - {; + if (init) + { init=0; -#ifndef NO_ERR +#ifndef OPENSSL_NO_ERR ERR_load_strings(ERR_LIB_DH,DH_str_functs); ERR_load_strings(ERR_LIB_DH,DH_str_reasons); #endif diff --git a/src/lib/libcrypto/dh/dh_gen.c b/src/lib/libcrypto/dh/dh_gen.c index 04c7046a7b..06f78b35ab 100644 --- a/src/lib/libcrypto/dh/dh_gen.c +++ b/src/lib/libcrypto/dh/dh_gen.c @@ -58,8 +58,8 @@ #include #include "cryptlib.h" -#include "bn.h" -#include "dh.h" +#include +#include /* We generate DH parameters as follows * find a prime q which is prime_len/2 bits long. @@ -72,22 +72,22 @@ * Having said all that, * there is another special case method for the generators 2, 3 and 5. * for 2, p mod 24 == 11 - * for 3, p mod 12 == 5 <<<<< does not work for strong primes. + * for 3, p mod 12 == 5 <<<<< does not work for safe primes. * for 5, p mod 10 == 3 or 7 * * Thanks to Phil Karn for the pointers about the * special generators and for answering some of my questions. * * I've implemented the second simple method :-). - * Since DH should be using a strong prime (both p and q are prime), + * 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. */ - -DH *DH_generate_parameters(prime_len,generator,callback,cb_arg) -int prime_len; -int generator; -void (*callback)(P_I_I_P); -char *cb_arg; +/* 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. + */ +DH *DH_generate_parameters(int prime_len, int generator, + void (*callback)(int,int,void *), void *cb_arg) { BIGNUM *p=NULL,*t1,*t2; DH *ret=NULL; @@ -95,38 +95,53 @@ char *cb_arg; BN_CTX *ctx=NULL; ret=DH_new(); + if (ret == NULL) goto err; ctx=BN_CTX_new(); if (ctx == NULL) goto err; - t1=ctx->bn[0]; - t2=ctx->bn[1]; - ctx->tos=2; + BN_CTX_start(ctx); + t1 = BN_CTX_get(ctx); + t2 = BN_CTX_get(ctx); + if (t1 == NULL || t2 == NULL) goto err; + if (generator <= 1) + { + DHerr(DH_F_DH_GENERATE_PARAMETERS, DH_R_BAD_GENERATOR); + goto err; + } if (generator == DH_GENERATOR_2) { - BN_set_word(t1,24); - BN_set_word(t2,11); + if (!BN_set_word(t1,24)) goto err; + if (!BN_set_word(t2,11)) goto err; g=2; } -#ifdef undef /* does not work for strong primes */ +#if 0 /* does not work for safe primes */ else if (generator == DH_GENERATOR_3) { - BN_set_word(t1,12); - BN_set_word(t2,5); + 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) { - BN_set_word(t1,10); - BN_set_word(t2,3); + 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; + } - p=BN_generate_prime(prime_len,1,t1,t2,callback,cb_arg); + p=BN_generate_prime(NULL,prime_len,1,t1,t2,callback,cb_arg); if (p == NULL) goto err; if (callback != NULL) callback(3,0,cb_arg); ret->p=p; @@ -140,7 +155,11 @@ err: ok=0; } - if (ctx != NULL) BN_CTX_free(ctx); + if (ctx != NULL) + { + BN_CTX_end(ctx); + BN_CTX_free(ctx); + } if (!ok && (ret != NULL)) { DH_free(ret); diff --git a/src/lib/libcrypto/dh/dh_key.c b/src/lib/libcrypto/dh/dh_key.c index 7576772bcd..1a0efca2c4 100644 --- a/src/lib/libcrypto/dh/dh_key.c +++ b/src/lib/libcrypto/dh/dh_key.c @@ -58,32 +58,63 @@ #include #include "cryptlib.h" -#include "bn.h" -#include "rand.h" -#include "dh.h" +#include +#include +#include +#include -int DH_generate_key(dh) -DH *dh; +static int generate_key(DH *dh); +static int compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh); +static int dh_bn_mod_exp(const DH *dh, BIGNUM *r, + const BIGNUM *a, const BIGNUM *p, + const BIGNUM *m, BN_CTX *ctx, + BN_MONT_CTX *m_ctx); +static int dh_init(DH *dh); +static int dh_finish(DH *dh); + +int DH_generate_key(DH *dh) + { + return dh->meth->generate_key(dh); + } + +int DH_compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh) + { + return dh->meth->compute_key(key, pub_key, dh); + } + +static DH_METHOD dh_ossl = { +"OpenSSL DH Method", +generate_key, +compute_key, +dh_bn_mod_exp, +dh_init, +dh_finish, +0, +NULL +}; + +const DH_METHOD *DH_OpenSSL(void) +{ + return &dh_ossl; +} + +static int generate_key(DH *dh) { int ok=0; - unsigned int i; - BN_CTX *ctx=NULL; + int generate_new_key=0; + unsigned l; + BN_CTX *ctx; + BN_MONT_CTX *mont; BIGNUM *pub_key=NULL,*priv_key=NULL; - ctx=BN_CTX_new(); + ctx = BN_CTX_new(); if (ctx == NULL) goto err; if (dh->priv_key == NULL) { - i=dh->length; - if (i == 0) - { - /* Make the number p-1 bits long */ - i=BN_num_bits(dh->p)-1; - } priv_key=BN_new(); if (priv_key == NULL) goto err; - if (!BN_rand(priv_key,i,0,0)) goto err; + generate_new_key=1; } else priv_key=dh->priv_key; @@ -96,7 +127,21 @@ DH *dh; else pub_key=dh->pub_key; - if (!BN_mod_exp(pub_key,dh->g,priv_key,dh->p,ctx)) goto err; + if ((dh->method_mont_p == NULL) && (dh->flags & DH_FLAG_CACHE_MONT_P)) + { + if ((dh->method_mont_p=(char *)BN_MONT_CTX_new()) != NULL) + if (!BN_MONT_CTX_set((BN_MONT_CTX *)dh->method_mont_p, + dh->p,ctx)) goto err; + } + mont=(BN_MONT_CTX *)dh->method_mont_p; + + if (generate_new_key) + { + l = dh->length ? dh->length : BN_num_bits(dh->p)-1; /* secret exponent length */ + if (!BN_rand(priv_key, l, 0, 0)) goto err; + } + if (!dh->meth->bn_mod_exp(dh, pub_key, dh->g, priv_key,dh->p,ctx,mont)) + goto err; dh->pub_key=pub_key; dh->priv_key=priv_key; @@ -107,29 +152,36 @@ err: if ((pub_key != NULL) && (dh->pub_key == NULL)) BN_free(pub_key); if ((priv_key != NULL) && (dh->priv_key == NULL)) BN_free(priv_key); - if (ctx != NULL) BN_CTX_free(ctx); + BN_CTX_free(ctx); return(ok); } -int DH_compute_key(key,pub_key,dh) -unsigned char *key; -BIGNUM *pub_key; -DH *dh; +static int compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh) { BN_CTX *ctx; + BN_MONT_CTX *mont; BIGNUM *tmp; int ret= -1; - ctx=BN_CTX_new(); + ctx = BN_CTX_new(); if (ctx == NULL) goto err; - tmp=ctx->bn[ctx->tos++]; + BN_CTX_start(ctx); + tmp = BN_CTX_get(ctx); if (dh->priv_key == NULL) { DHerr(DH_F_DH_COMPUTE_KEY,DH_R_NO_PRIVATE_VALUE); goto err; } - if (!BN_mod_exp(tmp,pub_key,dh->priv_key,dh->p,ctx)) + if ((dh->method_mont_p == NULL) && (dh->flags & DH_FLAG_CACHE_MONT_P)) + { + if ((dh->method_mont_p=(char *)BN_MONT_CTX_new()) != NULL) + if (!BN_MONT_CTX_set((BN_MONT_CTX *)dh->method_mont_p, + dh->p,ctx)) goto err; + } + + mont=(BN_MONT_CTX *)dh->method_mont_p; + if (!dh->meth->bn_mod_exp(dh, tmp, pub_key, dh->priv_key,dh->p,ctx,mont)) { DHerr(DH_F_DH_COMPUTE_KEY,ERR_R_BN_LIB); goto err; @@ -137,6 +189,35 @@ DH *dh; ret=BN_bn2bin(tmp,key); err: - if (ctx != NULL) BN_CTX_free(ctx); + BN_CTX_end(ctx); + BN_CTX_free(ctx); return(ret); } + +static int dh_bn_mod_exp(const DH *dh, BIGNUM *r, + const BIGNUM *a, const BIGNUM *p, + const BIGNUM *m, BN_CTX *ctx, + BN_MONT_CTX *m_ctx) + { + if (a->top == 1) + { + BN_ULONG A = a->d[0]; + return BN_mod_exp_mont_word(r,A,p,m,ctx,m_ctx); + } + else + return BN_mod_exp_mont(r,a,p,m,ctx,m_ctx); + } + + +static int dh_init(DH *dh) + { + dh->flags |= DH_FLAG_CACHE_MONT_P; + return(1); + } + +static int dh_finish(DH *dh) + { + if(dh->method_mont_p) + BN_MONT_CTX_free((BN_MONT_CTX *)dh->method_mont_p); + return(1); + } diff --git a/src/lib/libcrypto/dh/dh_lib.c b/src/lib/libcrypto/dh/dh_lib.c index a300b38396..ba5fd41057 100644 --- a/src/lib/libcrypto/dh/dh_lib.c +++ b/src/lib/libcrypto/dh/dh_lib.c @@ -58,21 +58,84 @@ #include #include "cryptlib.h" -#include "bn.h" -#include "dh.h" +#include +#include +#include -char *DH_version="Diffie-Hellman part of SSLeay 0.9.0b 29-Jun-1998"; +const char *DH_version="Diffie-Hellman" OPENSSL_VERSION_PTEXT; -DH *DH_new() +static const DH_METHOD *default_DH_method = NULL; + +void DH_set_default_method(const DH_METHOD *meth) + { + default_DH_method = meth; + } + +const DH_METHOD *DH_get_default_method(void) + { + if(!default_DH_method) + default_DH_method = DH_OpenSSL(); + return default_DH_method; + } + +int DH_set_method(DH *dh, const DH_METHOD *meth) + { + /* NB: The caller is specifically setting a method, so it's not up to us + * to deal with which ENGINE it comes from. */ + const DH_METHOD *mtmp; + mtmp = dh->meth; + if (mtmp->finish) mtmp->finish(dh); + if (dh->engine) + { + ENGINE_finish(dh->engine); + dh->engine = NULL; + } + dh->meth = meth; + if (meth->init) meth->init(dh); + return 1; + } + +DH *DH_new(void) + { + return DH_new_method(NULL); + } + +DH *DH_new_method(ENGINE *engine) { DH *ret; - ret=(DH *)Malloc(sizeof(DH)); + ret=(DH *)OPENSSL_malloc(sizeof(DH)); if (ret == NULL) { - DHerr(DH_F_DH_NEW,ERR_R_MALLOC_FAILURE); + DHerr(DH_F_DH_NEW_METHOD,ERR_R_MALLOC_FAILURE); return(NULL); } + + ret->meth = DH_get_default_method(); + if (engine) + { + if (!ENGINE_init(engine)) + { + DHerr(DH_F_DH_NEW_METHOD, ERR_R_ENGINE_LIB); + OPENSSL_free(ret); + return NULL; + } + ret->engine = engine; + } + else + ret->engine = ENGINE_get_default_DH(); + if(ret->engine) + { + ret->meth = ENGINE_get_DH(ret->engine); + if(!ret->meth) + { + DHerr(DH_F_DH_NEW_METHOD,ERR_R_ENGINE_LIB); + ENGINE_finish(ret->engine); + OPENSSL_free(ret); + return NULL; + } + } + ret->pad=0; ret->version=0; ret->p=NULL; @@ -80,21 +143,95 @@ DH *DH_new() ret->length=0; ret->pub_key=NULL; ret->priv_key=NULL; + ret->q=NULL; + ret->j=NULL; + ret->seed = NULL; + ret->seedlen = 0; + ret->counter = NULL; + ret->method_mont_p=NULL; + ret->references = 1; + ret->flags=ret->meth->flags; + CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data); + if ((ret->meth->init != NULL) && !ret->meth->init(ret)) + { + if (ret->engine) + ENGINE_finish(ret->engine); + CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data); + OPENSSL_free(ret); + ret=NULL; + } return(ret); } -void DH_free(r) -DH *r; +void DH_free(DH *r) { + int i; + if(r == NULL) return; + i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_DH); +#ifdef REF_PRINT + REF_PRINT("DH",r); +#endif + if (i > 0) return; +#ifdef REF_CHECK + if (i < 0) + { + fprintf(stderr,"DH_free, bad reference count\n"); + abort(); + } +#endif + + if (r->meth->finish) + r->meth->finish(r); + if (r->engine) + ENGINE_finish(r->engine); + + CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, r, &r->ex_data); + if (r->p != NULL) BN_clear_free(r->p); if (r->g != NULL) BN_clear_free(r->g); + if (r->q != NULL) BN_clear_free(r->q); + if (r->j != NULL) BN_clear_free(r->j); + if (r->seed) OPENSSL_free(r->seed); + if (r->counter != NULL) BN_clear_free(r->counter); if (r->pub_key != NULL) BN_clear_free(r->pub_key); if (r->priv_key != NULL) BN_clear_free(r->priv_key); - Free(r); + OPENSSL_free(r); + } + +int DH_up_ref(DH *r) + { + int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_DH); +#ifdef REF_PRINT + REF_PRINT("DH",r); +#endif +#ifdef REF_CHECK + if (i < 2) + { + fprintf(stderr, "DH_up, bad reference count\n"); + abort(); + } +#endif + return ((i > 1) ? 1 : 0); + } + +int DH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, + CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) + { + return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DH, argl, argp, + new_func, dup_func, free_func); + } + +int DH_set_ex_data(DH *d, int idx, void *arg) + { + return(CRYPTO_set_ex_data(&d->ex_data,idx,arg)); + } + +void *DH_get_ex_data(DH *d, int idx) + { + return(CRYPTO_get_ex_data(&d->ex_data,idx)); } -int DH_size(dh) -DH *dh; +int DH_size(const DH *dh) { return(BN_num_bytes(dh->p)); } -- cgit v1.2.3-55-g6feb