- {
- 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;
+}