Fix signature verification.

diff --git a/gost_pmeth.c b/gost_pmeth.c
index 9a01822fdd818ada12b85b491819b11d1b4b4cdb..ce162f55d3a3e2a2e9783107f556ba2d433ad65d 100644 (file)
--- a/gost_pmeth.c
+++ b/gost_pmeth.c
@@ -417,20 +417,20 @@ static int pkey_gost_ec_cp_sign(EVP_PKEY_CTX *ctx, unsigned char *sig,
 
 /* ------------------- verify callbacks ---------------------------*/
 /* Unpack signature according to cryptopro rules  */
-DSA_SIG *unpack_cp_signature(const unsigned char *sig, size_t siglen)
+DSA_SIG *unpack_cp_signature(const unsigned char *sigbuf, size_t siglen)
 {
-    DSA_SIG *s;
-    const BIGNUM *sig_r = NULL, *sig_s = NULL;
+    DSA_SIG *sig;
+    BIGNUM *r = NULL, *s = NULL;
 
-    s = DSA_SIG_new();
-    if (s == NULL) {
+    sig = DSA_SIG_new();
+    if (sig == NULL) {
         GOSTerr(GOST_F_UNPACK_CP_SIGNATURE, ERR_R_MALLOC_FAILURE);
         return NULL;
     }
-    DSA_SIG_get0(s, &sig_r, &sig_s);
-    sig_s = BN_bin2bn(sig, siglen / 2, NULL);
-    sig_r = BN_bin2bn(sig + siglen / 2, siglen / 2, NULL);
-    return s;
+    s = BN_bin2bn(sigbuf, siglen / 2, NULL);
+    r = BN_bin2bn(sigbuf + siglen / 2, siglen / 2, NULL);
+               DSA_SIG_set0(sig, r, s);
+    return sig;
 }
 
 static int pkey_gost_ec_cp_verify(EVP_PKEY_CTX *ctx, const unsigned char *sig,