/* 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.
* 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
*
*/
#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) 0x##a1##a2##a3##a4##UI64
-# elif defined(__arch64__)
-# define bn_pack4(a1,a2,a3,a4) 0x##a1##a2##a3##a4##UL
-# else
-# define bn_pack4(a1,a2,a3,a4) 0x##a1##a2##a3##a4##ULL
-# endif
-#elif (BN_BYTES == 4)
-# define bn_pack4(a1,a2,a3,a4) 0x##a3##a4##UL, 0x##a1##a2##UL
-#else
-# error "unsupported BN_BYTES"
-#endif
-
-
-#include "srp_grps.h"
+# include "internal/cryptlib.h"
+# include <openssl/sha.h>
+# include <openssl/srp.h>
+# include <openssl/evp.h>
+# include "internal/bn_srp.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 ((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 = NULL;
+ int longg;
+ int longN = BN_num_bytes(N);
+ BIGNUM *res = NULL;
+
+ if (BN_ucmp(g, N) >= 0)
+ return NULL;
+
+ ctxt = EVP_MD_CTX_new();
+ if (ctxt == NULL)
+ return NULL;
+ if ((tmp = OPENSSL_malloc(longN)) == NULL)
+ goto err;
+ BN_bn2bin(N, tmp);
+
+ 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);
+ res = BN_bin2bn(digest, sizeof(digest), NULL);
+ err:
+ EVP_MD_CTX_free(ctxt);
+ return res;
+}
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;
-
- 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 = NULL;
+ unsigned char cu[SHA_DIGEST_LENGTH];
+ unsigned char *cAB = NULL;
+ EVP_MD_CTX *ctxt = NULL;
+ 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);
+
+ ctxt = EVP_MD_CTX_new();
+ if (ctxt == NULL)
+ return NULL;
+ if ((cAB = OPENSSL_malloc(2 * longN)) == NULL)
+ goto err;
+
+ memset(cAB, 0, longN);
+
+ 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);
+
+ if ((u = BN_bin2bn(cu, sizeof(cu), NULL)) == NULL)
+ goto err;
+ if (BN_is_zero(u)) {
+ BN_free(u);
+ u = NULL;
+ }
+ err:
+ EVP_MD_CTX_free(ctxt);
+
+ return u;
}
-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)) == NULL
+ || !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;
+ BIGNUM *res = NULL;
+
+ if ((s == NULL) || (user == NULL) || (pass == NULL))
+ return NULL;
+
+ ctxt = EVP_MD_CTX_new();
+ if (ctxt == NULL)
+ return NULL;
+ if ((cs = OPENSSL_malloc(BN_num_bytes(s))) == NULL)
+ goto err;
+
+ 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);
+
+ res = BN_bin2bn(dig, sizeof(dig), NULL);
+ err:
+ EVP_MD_CTX_free(ctxt);
+ return res;
+}
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)) == NULL)
+ 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) ;
- }
-
-
-/* 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;
- }
+{
+ /* Checks if A % N == 0 */
+ return SRP_Verify_B_mod_N(A, N);
+}
+
+static SRP_gN knowngN[] = {
+ {"8192", (BIGNUM *)&bn_generator_19, (BIGNUM *)&bn_group_8192},
+ {"6144", (BIGNUM *)&bn_generator_5, (BIGNUM *)&bn_group_6144},
+ {"4096", (BIGNUM *)&bn_generator_5, (BIGNUM *)&bn_group_4096},
+ {"3072", (BIGNUM *)&bn_generator_5, (BIGNUM *)&bn_group_3072},
+ {"2048", (BIGNUM *)&bn_generator_2, (BIGNUM *)&bn_group_2048},
+ {"1536", (BIGNUM *)&bn_generator_2, (BIGNUM *)&bn_group_1536},
+ {"1024", (BIGNUM *)&bn_generator_2, (BIGNUM *)&bn_group_1024},
+};
+
+# define KNOWN_GN_NUMBER sizeof(knowngN) / sizeof(SRP_gN)
+
+/*
+ * 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;
+
+ 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
projects / openssl.git / blobdiff