diff options
Diffstat (limited to 'openssl/crypto/srp/srp_lib.c')
| -rw-r--r-- | openssl/crypto/srp/srp_lib.c | 566 |
1 files changed, 278 insertions, 288 deletions
diff --git a/openssl/crypto/srp/srp_lib.c b/openssl/crypto/srp/srp_lib.c index 83d417a30..e9a2e058f 100644 --- a/openssl/crypto/srp/srp_lib.c +++ b/openssl/crypto/srp/srp_lib.c @@ -1,7 +1,8 @@ /* crypto/srp/srp_lib.c */ -/* Written by Christophe Renou (christophe.renou@edelweb.fr) with - * the precious help of Peter Sylvester (peter.sylvester@edelweb.fr) - * for the EdelKey project and contributed to the OpenSSL project 2004. +/* + * Written by Christophe Renou (christophe.renou@edelweb.fr) with the + * precious help of Peter Sylvester (peter.sylvester@edelweb.fr) for the + * EdelKey project and contributed to the OpenSSL project 2004. */ /* ==================================================================== * Copyright (c) 2004 The OpenSSL Project. All rights reserved. @@ -11,7 +12,7 @@ * are met: * * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. + * 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 @@ -57,311 +58,300 @@ * */ #ifndef OPENSSL_NO_SRP -#include "cryptlib.h" -#include "srp_lcl.h" -#include <openssl/srp.h> -#include <openssl/evp.h> - -#if (BN_BYTES == 8) -# if (defined(_WIN32) || defined(_WIN64)) && !defined(__MINGW32__) -# define bn_pack4(a1,a2,a3,a4) ((a1##UI64<<48)|(a2##UI64<<32)|(a3##UI64<<16)|a4##UI64) -# elif defined(__arch64__) -# define bn_pack4(a1,a2,a3,a4) ((a1##UL<<48)|(a2##UL<<32)|(a3##UL<<16)|a4##UL) +# include "cryptlib.h" +# include "srp_lcl.h" +# include <openssl/srp.h> +# include <openssl/evp.h> + +# if (BN_BYTES == 8) +# if (defined(_WIN32) || defined(_WIN64)) && !defined(__MINGW32__) +# define bn_pack4(a1,a2,a3,a4) ((a1##UI64<<48)|(a2##UI64<<32)|(a3##UI64<<16)|a4##UI64) +# elif defined(__arch64__) +# define bn_pack4(a1,a2,a3,a4) ((a1##UL<<48)|(a2##UL<<32)|(a3##UL<<16)|a4##UL) +# else +# define bn_pack4(a1,a2,a3,a4) ((a1##ULL<<48)|(a2##ULL<<32)|(a3##ULL<<16)|a4##ULL) +# endif +# elif (BN_BYTES == 4) +# define bn_pack4(a1,a2,a3,a4) ((a3##UL<<16)|a4##UL), ((a1##UL<<16)|a2##UL) # else -# define bn_pack4(a1,a2,a3,a4) ((a1##ULL<<48)|(a2##ULL<<32)|(a3##ULL<<16)|a4##ULL) +# error "unsupported BN_BYTES" # endif -#elif (BN_BYTES == 4) -# define bn_pack4(a1,a2,a3,a4) ((a3##UL<<16)|a4##UL), ((a1##UL<<16)|a2##UL) -#else -# error "unsupported BN_BYTES" -#endif - -#include "srp_grps.h" +# include "srp_grps.h" static BIGNUM *srp_Calc_k(BIGNUM *N, BIGNUM *g) - { - /* k = SHA1(N | PAD(g)) -- tls-srp draft 8 */ - - unsigned char digest[SHA_DIGEST_LENGTH]; - unsigned char *tmp; - EVP_MD_CTX ctxt; - int longg ; - int longN = BN_num_bytes(N); - - if (BN_ucmp(g, N) >= 0) - return NULL; - - if ((tmp = OPENSSL_malloc(longN)) == NULL) - return NULL; - BN_bn2bin(N,tmp) ; - - EVP_MD_CTX_init(&ctxt); - EVP_DigestInit_ex(&ctxt, EVP_sha1(), NULL); - EVP_DigestUpdate(&ctxt, tmp, longN); - - memset(tmp, 0, longN); - longg = BN_bn2bin(g,tmp) ; - /* use the zeros behind to pad on left */ - EVP_DigestUpdate(&ctxt, tmp + longg, longN-longg); - EVP_DigestUpdate(&ctxt, tmp, longg); - OPENSSL_free(tmp); - - EVP_DigestFinal_ex(&ctxt, digest, NULL); - EVP_MD_CTX_cleanup(&ctxt); - return BN_bin2bn(digest, sizeof(digest), NULL); - } +{ + /* k = SHA1(N | PAD(g)) -- tls-srp draft 8 */ + + unsigned char digest[SHA_DIGEST_LENGTH]; + unsigned char *tmp; + EVP_MD_CTX ctxt; + int longg; + int longN = BN_num_bytes(N); + + if (BN_ucmp(g, N) >= 0) + return NULL; + + if ((tmp = OPENSSL_malloc(longN)) == NULL) + return NULL; + BN_bn2bin(N, tmp); + + EVP_MD_CTX_init(&ctxt); + EVP_DigestInit_ex(&ctxt, EVP_sha1(), NULL); + EVP_DigestUpdate(&ctxt, tmp, longN); + + memset(tmp, 0, longN); + longg = BN_bn2bin(g, tmp); + /* use the zeros behind to pad on left */ + EVP_DigestUpdate(&ctxt, tmp + longg, longN - longg); + EVP_DigestUpdate(&ctxt, tmp, longg); + OPENSSL_free(tmp); + + EVP_DigestFinal_ex(&ctxt, digest, NULL); + EVP_MD_CTX_cleanup(&ctxt); + return BN_bin2bn(digest, sizeof(digest), NULL); +} BIGNUM *SRP_Calc_u(BIGNUM *A, BIGNUM *B, BIGNUM *N) - { - /* k = SHA1(PAD(A) || PAD(B) ) -- tls-srp draft 8 */ - - BIGNUM *u; - unsigned char cu[SHA_DIGEST_LENGTH]; - unsigned char *cAB; - EVP_MD_CTX ctxt; - int longN; - if ((A == NULL) ||(B == NULL) || (N == NULL)) - return NULL; - - if (BN_ucmp(A, N) >= 0 || BN_ucmp(B, N) >= 0) - return NULL; - - longN= BN_num_bytes(N); - - if ((cAB = OPENSSL_malloc(2*longN)) == NULL) - return NULL; - - memset(cAB, 0, longN); - - EVP_MD_CTX_init(&ctxt); - EVP_DigestInit_ex(&ctxt, EVP_sha1(), NULL); - EVP_DigestUpdate(&ctxt, cAB + BN_bn2bin(A,cAB+longN), longN); - EVP_DigestUpdate(&ctxt, cAB + BN_bn2bin(B,cAB+longN), longN); - OPENSSL_free(cAB); - EVP_DigestFinal_ex(&ctxt, cu, NULL); - EVP_MD_CTX_cleanup(&ctxt); - - if (!(u = BN_bin2bn(cu, sizeof(cu), NULL))) - return NULL; - if (!BN_is_zero(u)) - return u; - BN_free(u); - return NULL; +{ + /* k = SHA1(PAD(A) || PAD(B) ) -- tls-srp draft 8 */ + + BIGNUM *u; + unsigned char cu[SHA_DIGEST_LENGTH]; + unsigned char *cAB; + EVP_MD_CTX ctxt; + int longN; + if ((A == NULL) || (B == NULL) || (N == NULL)) + return NULL; + + if (BN_ucmp(A, N) >= 0 || BN_ucmp(B, N) >= 0) + return NULL; + + longN = BN_num_bytes(N); + + if ((cAB = OPENSSL_malloc(2 * longN)) == NULL) + return NULL; + + memset(cAB, 0, longN); + + EVP_MD_CTX_init(&ctxt); + EVP_DigestInit_ex(&ctxt, EVP_sha1(), NULL); + EVP_DigestUpdate(&ctxt, cAB + BN_bn2bin(A, cAB + longN), longN); + EVP_DigestUpdate(&ctxt, cAB + BN_bn2bin(B, cAB + longN), longN); + OPENSSL_free(cAB); + EVP_DigestFinal_ex(&ctxt, cu, NULL); + EVP_MD_CTX_cleanup(&ctxt); + + if (!(u = BN_bin2bn(cu, sizeof(cu), NULL))) + return NULL; + if (!BN_is_zero(u)) + return u; + BN_free(u); + return NULL; } -BIGNUM *SRP_Calc_server_key(BIGNUM *A, BIGNUM *v, BIGNUM *u, BIGNUM *b, BIGNUM *N) - { - BIGNUM *tmp = NULL, *S = NULL; - BN_CTX *bn_ctx; - - if (u == NULL || A == NULL || v == NULL || b == NULL || N == NULL) - return NULL; - - if ((bn_ctx = BN_CTX_new()) == NULL || - (tmp = BN_new()) == NULL || - (S = BN_new()) == NULL ) - goto err; - - /* S = (A*v**u) ** b */ - - if (!BN_mod_exp(tmp,v,u,N,bn_ctx)) - goto err; - if (!BN_mod_mul(tmp,A,tmp,N,bn_ctx)) - goto err; - if (!BN_mod_exp(S,tmp,b,N,bn_ctx)) - goto err; -err: - BN_CTX_free(bn_ctx); - BN_clear_free(tmp); - return S; - } +BIGNUM *SRP_Calc_server_key(BIGNUM *A, BIGNUM *v, BIGNUM *u, BIGNUM *b, + BIGNUM *N) +{ + BIGNUM *tmp = NULL, *S = NULL; + BN_CTX *bn_ctx; + + if (u == NULL || A == NULL || v == NULL || b == NULL || N == NULL) + return NULL; + + if ((bn_ctx = BN_CTX_new()) == NULL || + (tmp = BN_new()) == NULL || (S = BN_new()) == NULL) + goto err; + + /* S = (A*v**u) ** b */ + + if (!BN_mod_exp(tmp, v, u, N, bn_ctx)) + goto err; + if (!BN_mod_mul(tmp, A, tmp, N, bn_ctx)) + goto err; + if (!BN_mod_exp(S, tmp, b, N, bn_ctx)) + goto err; + err: + BN_CTX_free(bn_ctx); + BN_clear_free(tmp); + return S; +} BIGNUM *SRP_Calc_B(BIGNUM *b, BIGNUM *N, BIGNUM *g, BIGNUM *v) - { - BIGNUM *kv = NULL, *gb = NULL; - BIGNUM *B = NULL, *k = NULL; - BN_CTX *bn_ctx; - - if (b == NULL || N == NULL || g == NULL || v == NULL || - (bn_ctx = BN_CTX_new()) == NULL) - return NULL; - - if ( (kv = BN_new()) == NULL || - (gb = BN_new()) == NULL || - (B = BN_new())== NULL) - goto err; - - /* B = g**b + k*v */ - - if (!BN_mod_exp(gb,g,b,N,bn_ctx) || - !(k = srp_Calc_k(N,g)) || - !BN_mod_mul(kv,v,k,N,bn_ctx) || - !BN_mod_add(B,gb,kv,N,bn_ctx)) - { - BN_free(B); - B = NULL; - } -err: - BN_CTX_free(bn_ctx); - BN_clear_free(kv); - BN_clear_free(gb); - BN_free(k); - return B; - } +{ + BIGNUM *kv = NULL, *gb = NULL; + BIGNUM *B = NULL, *k = NULL; + BN_CTX *bn_ctx; + + if (b == NULL || N == NULL || g == NULL || v == NULL || + (bn_ctx = BN_CTX_new()) == NULL) + return NULL; + + if ((kv = BN_new()) == NULL || + (gb = BN_new()) == NULL || (B = BN_new()) == NULL) + goto err; + + /* B = g**b + k*v */ + + if (!BN_mod_exp(gb, g, b, N, bn_ctx) || + !(k = srp_Calc_k(N, g)) || + !BN_mod_mul(kv, v, k, N, bn_ctx) || + !BN_mod_add(B, gb, kv, N, bn_ctx)) { + BN_free(B); + B = NULL; + } + err: + BN_CTX_free(bn_ctx); + BN_clear_free(kv); + BN_clear_free(gb); + BN_free(k); + return B; +} BIGNUM *SRP_Calc_x(BIGNUM *s, const char *user, const char *pass) - { - unsigned char dig[SHA_DIGEST_LENGTH]; - EVP_MD_CTX ctxt; - unsigned char *cs; - - if ((s == NULL) || - (user == NULL) || - (pass == NULL)) - return NULL; - - if ((cs = OPENSSL_malloc(BN_num_bytes(s))) == NULL) - return NULL; - - EVP_MD_CTX_init(&ctxt); - EVP_DigestInit_ex(&ctxt, EVP_sha1(), NULL); - EVP_DigestUpdate(&ctxt, user, strlen(user)); - EVP_DigestUpdate(&ctxt, ":", 1); - EVP_DigestUpdate(&ctxt, pass, strlen(pass)); - EVP_DigestFinal_ex(&ctxt, dig, NULL); - - EVP_DigestInit_ex(&ctxt, EVP_sha1(), NULL); - BN_bn2bin(s,cs); - EVP_DigestUpdate(&ctxt, cs, BN_num_bytes(s)); - OPENSSL_free(cs); - EVP_DigestUpdate(&ctxt, dig, sizeof(dig)); - EVP_DigestFinal_ex(&ctxt, dig, NULL); - EVP_MD_CTX_cleanup(&ctxt); - - return BN_bin2bn(dig, sizeof(dig), NULL); - } +{ + unsigned char dig[SHA_DIGEST_LENGTH]; + EVP_MD_CTX ctxt; + unsigned char *cs; + + if ((s == NULL) || (user == NULL) || (pass == NULL)) + return NULL; + + if ((cs = OPENSSL_malloc(BN_num_bytes(s))) == NULL) + return NULL; + + EVP_MD_CTX_init(&ctxt); + EVP_DigestInit_ex(&ctxt, EVP_sha1(), NULL); + EVP_DigestUpdate(&ctxt, user, strlen(user)); + EVP_DigestUpdate(&ctxt, ":", 1); + EVP_DigestUpdate(&ctxt, pass, strlen(pass)); + EVP_DigestFinal_ex(&ctxt, dig, NULL); + + EVP_DigestInit_ex(&ctxt, EVP_sha1(), NULL); + BN_bn2bin(s, cs); + EVP_DigestUpdate(&ctxt, cs, BN_num_bytes(s)); + OPENSSL_free(cs); + EVP_DigestUpdate(&ctxt, dig, sizeof(dig)); + EVP_DigestFinal_ex(&ctxt, dig, NULL); + EVP_MD_CTX_cleanup(&ctxt); + + return BN_bin2bn(dig, sizeof(dig), NULL); +} BIGNUM *SRP_Calc_A(BIGNUM *a, BIGNUM *N, BIGNUM *g) - { - BN_CTX *bn_ctx; - BIGNUM * A = NULL; - - if (a == NULL || N == NULL || g == NULL || - (bn_ctx = BN_CTX_new()) == NULL) - return NULL; - - if ((A = BN_new()) != NULL && - !BN_mod_exp(A,g,a,N,bn_ctx)) - { - BN_free(A); - A = NULL; - } - BN_CTX_free(bn_ctx); - return A; - } - - -BIGNUM *SRP_Calc_client_key(BIGNUM *N, BIGNUM *B, BIGNUM *g, BIGNUM *x, BIGNUM *a, BIGNUM *u) - { - BIGNUM *tmp = NULL, *tmp2 = NULL, *tmp3 = NULL , *k = NULL, *K = NULL; - BN_CTX *bn_ctx; - - if (u == NULL || B == NULL || N == NULL || g == NULL || x == NULL || a == NULL || - (bn_ctx = BN_CTX_new()) == NULL) - return NULL; - - if ((tmp = BN_new()) == NULL || - (tmp2 = BN_new())== NULL || - (tmp3 = BN_new())== NULL || - (K = BN_new()) == NULL) - goto err; - - if (!BN_mod_exp(tmp,g,x,N,bn_ctx)) - goto err; - if (!(k = srp_Calc_k(N,g))) - goto err; - if (!BN_mod_mul(tmp2,tmp,k,N,bn_ctx)) - goto err; - if (!BN_mod_sub(tmp,B,tmp2,N,bn_ctx)) - goto err; - - if (!BN_mod_mul(tmp3,u,x,N,bn_ctx)) - goto err; - if (!BN_mod_add(tmp2,a,tmp3,N,bn_ctx)) - goto err; - if (!BN_mod_exp(K,tmp,tmp2,N,bn_ctx)) - goto err; - -err : - BN_CTX_free(bn_ctx); - BN_clear_free(tmp); - BN_clear_free(tmp2); - BN_clear_free(tmp3); - BN_free(k); - return K; - } +{ + BN_CTX *bn_ctx; + BIGNUM *A = NULL; + + if (a == NULL || N == NULL || g == NULL || + (bn_ctx = BN_CTX_new()) == NULL) + return NULL; + + if ((A = BN_new()) != NULL && !BN_mod_exp(A, g, a, N, bn_ctx)) { + BN_free(A); + A = NULL; + } + BN_CTX_free(bn_ctx); + return A; +} + +BIGNUM *SRP_Calc_client_key(BIGNUM *N, BIGNUM *B, BIGNUM *g, BIGNUM *x, + BIGNUM *a, BIGNUM *u) +{ + BIGNUM *tmp = NULL, *tmp2 = NULL, *tmp3 = NULL, *k = NULL, *K = NULL; + BN_CTX *bn_ctx; + + if (u == NULL || B == NULL || N == NULL || g == NULL || x == NULL + || a == NULL || (bn_ctx = BN_CTX_new()) == NULL) + return NULL; + + if ((tmp = BN_new()) == NULL || + (tmp2 = BN_new()) == NULL || + (tmp3 = BN_new()) == NULL || (K = BN_new()) == NULL) + goto err; + + if (!BN_mod_exp(tmp, g, x, N, bn_ctx)) + goto err; + if (!(k = srp_Calc_k(N, g))) + goto err; + if (!BN_mod_mul(tmp2, tmp, k, N, bn_ctx)) + goto err; + if (!BN_mod_sub(tmp, B, tmp2, N, bn_ctx)) + goto err; + + if (!BN_mod_mul(tmp3, u, x, N, bn_ctx)) + goto err; + if (!BN_mod_add(tmp2, a, tmp3, N, bn_ctx)) + goto err; + if (!BN_mod_exp(K, tmp, tmp2, N, bn_ctx)) + goto err; + + err: + BN_CTX_free(bn_ctx); + BN_clear_free(tmp); + BN_clear_free(tmp2); + BN_clear_free(tmp3); + BN_free(k); + return K; +} int SRP_Verify_B_mod_N(BIGNUM *B, BIGNUM *N) - { - BIGNUM *r; - BN_CTX *bn_ctx; - int ret = 0; - - if (B == NULL || N == NULL || - (bn_ctx = BN_CTX_new()) == NULL) - return 0; - - if ((r = BN_new()) == NULL) - goto err; - /* Checks if B % N == 0 */ - if (!BN_nnmod(r,B,N,bn_ctx)) - goto err; - ret = !BN_is_zero(r); -err: - BN_CTX_free(bn_ctx); - BN_free(r); - return ret; - } +{ + BIGNUM *r; + BN_CTX *bn_ctx; + int ret = 0; + + if (B == NULL || N == NULL || (bn_ctx = BN_CTX_new()) == NULL) + return 0; + + if ((r = BN_new()) == NULL) + goto err; + /* Checks if B % N == 0 */ + if (!BN_nnmod(r, B, N, bn_ctx)) + goto err; + ret = !BN_is_zero(r); + err: + BN_CTX_free(bn_ctx); + BN_free(r); + return ret; +} int SRP_Verify_A_mod_N(BIGNUM *A, BIGNUM *N) - { - /* Checks if A % N == 0 */ - return SRP_Verify_B_mod_N(A,N) ; - } - +{ + /* Checks if A % N == 0 */ + return SRP_Verify_B_mod_N(A, N); +} -/* Check if G and N are kwown parameters. - The values have been generated from the ietf-tls-srp draft version 8 -*/ +/* + * Check if G and N are kwown parameters. The values have been generated + * from the ietf-tls-srp draft version 8 + */ char *SRP_check_known_gN_param(BIGNUM *g, BIGNUM *N) - { - size_t i; - if ((g == NULL) || (N == NULL)) - return 0; - - srp_bn_print(g); - srp_bn_print(N); - - for(i = 0; i < KNOWN_GN_NUMBER; i++) - { - if (BN_cmp(knowngN[i].g, g) == 0 && BN_cmp(knowngN[i].N, N) == 0) - return knowngN[i].id; - } - return NULL; - } +{ + size_t i; + if ((g == NULL) || (N == NULL)) + return 0; + + srp_bn_print(g); + srp_bn_print(N); + + for (i = 0; i < KNOWN_GN_NUMBER; i++) { + if (BN_cmp(knowngN[i].g, g) == 0 && BN_cmp(knowngN[i].N, N) == 0) + return knowngN[i].id; + } + return NULL; +} SRP_gN *SRP_get_default_gN(const char *id) - { - size_t i; - - if (id == NULL) - return knowngN; - for(i = 0; i < KNOWN_GN_NUMBER; i++) - { - if (strcmp(knowngN[i].id, id)==0) - return knowngN + i; - } - return NULL; - } +{ + size_t i; + + if (id == NULL) + return knowngN; + for (i = 0; i < KNOWN_GN_NUMBER; i++) { + if (strcmp(knowngN[i].id, id) == 0) + return knowngN + i; + } + return NULL; +} #endif |