ECDSA representation bugfixes
authorBodo Möller <bodo@openssl.org>
Fri, 12 Apr 2002 08:57:01 +0000 (08:57 +0000)
committerBodo Möller <bodo@openssl.org>
Fri, 12 Apr 2002 08:57:01 +0000 (08:57 +0000)
Submitted by: Nils Larsch

crypto/asn1/x_pubkey.c
crypto/ecdsa/ecs_asn1.c

index 9fea31a..a34f473 100644 (file)
@@ -132,43 +132,55 @@ int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
 #ifndef OPENSSL_NO_ECDSA
        else if (pkey->type == EVP_PKEY_ECDSA)
                {
+               int nid=0;
                unsigned char *pp;
                ECDSA *ecdsa;
                
                ecdsa = pkey->pkey.ecdsa;
                ASN1_TYPE_free(a->parameter);
-               if ((i = i2d_ECDSAParameters(ecdsa, NULL)) == 0)
-                       {
-                       X509err(X509_F_X509_PUBKEY_SET, ERR_R_ECDSA_LIB);
-                       goto err;
-                       }
-               if ((p = (unsigned char *) OPENSSL_malloc(i)) == NULL)
-                       {
-                       X509err(X509_F_X509_PUBKEY_SET, ERR_R_MALLOC_FAILURE);
-                       goto err;
-                       }       
-               pp = p;
-               if (!i2d_ECDSAParameters(ecdsa, &pp))
-                       {
-                       X509err(X509_F_X509_PUBKEY_SET, ERR_R_ECDSA_LIB);
-                       OPENSSL_free(p);
-                       goto err;
-                       }
+
                if ((a->parameter = ASN1_TYPE_new()) == NULL)
                        {
                        X509err(X509_F_X509_PUBKEY_SET, ERR_R_ASN1_LIB);
                        OPENSSL_free(p);
                        goto err;
                        }
-               a->parameter->type = V_ASN1_SEQUENCE;
-               if ((a->parameter->value.sequence = ASN1_STRING_new()) == NULL)
+
+               if ((ECDSA_get_parameter_flags(ecdsa) & ECDSA_FLAG_NAMED_CURVE) && (nid = EC_GROUP_get_nid(ecdsa->group)))
                        {
-                       X509err(X509_F_X509_PUBKEY_SET, ERR_R_ASN1_LIB);
+                       /* just set the OID */
+                       a->parameter->type = V_ASN1_OBJECT;
+                       a->parameter->value.object = OBJ_nid2obj(nid);
+                       }
+               else /* explicit parameters */
+                       {
+                       if ((i = i2d_ECDSAParameters(ecdsa, NULL)) == 0)
+                               {
+                               X509err(X509_F_X509_PUBKEY_SET, ERR_R_ECDSA_LIB);
+                               goto err;
+                               }
+                       if ((p = (unsigned char *) OPENSSL_malloc(i)) == NULL)
+                               {
+                               X509err(X509_F_X509_PUBKEY_SET, ERR_R_MALLOC_FAILURE);
+                               goto err;
+                               }       
+                       pp = p;
+                       if (!i2d_ECDSAParameters(ecdsa, &pp))
+                               {
+                               X509err(X509_F_X509_PUBKEY_SET, ERR_R_ECDSA_LIB);
+                               OPENSSL_free(p);
+                               goto err;
+                               }
+                       a->parameter->type = V_ASN1_SEQUENCE;
+                       if ((a->parameter->value.sequence = ASN1_STRING_new()) == NULL)
+                               {
+                               X509err(X509_F_X509_PUBKEY_SET, ERR_R_ASN1_LIB);
+                               OPENSSL_free(p);
+                               goto err;
+                               }
+                       ASN1_STRING_set(a->parameter->value.sequence, p, i);
                        OPENSSL_free(p);
-                       goto err;
                        }
-               ASN1_STRING_set(a->parameter->value.sequence, p, i);
-               OPENSSL_free(p);
                }
 #endif
        else if (1)
@@ -266,6 +278,9 @@ EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key)
                {
                if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE))
                        {
+                       /* type == V_ASN1_SEQUENCE => we have explicit parameters
+                         * (e.g. parameters in the X9_62_EC_PARAMETERS-structure )
+                        */
                        if ((ret->pkey.ecdsa= ECDSA_new()) == NULL)
                                {
                                X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
@@ -279,6 +294,20 @@ EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key)
                                goto err;
                                }
                        }
+               else if (a->parameter && (a->parameter->type == V_ASN1_OBJECT))
+                       {
+                       /* type == V_ASN1_OBJECT => the parameters are given
+                        * by an asn1 OID
+                        */
+                       if (ret->pkey.ecdsa == NULL)
+                               ret->pkey.ecdsa = ECDSA_new();
+                       if (ret->pkey.ecdsa->group)
+                               EC_GROUP_free(ret->pkey.ecdsa->group);
+                       ret->pkey.ecdsa->parameter_flags |= ECDSA_FLAG_NAMED_CURVE;
+                       if ((ret->pkey.ecdsa->group = EC_GROUP_new_by_name(OBJ_obj2nid(a->parameter->value.object))) == NULL)
+                               goto err;
+                       }
+                       /* the case implicitlyCA is currently not implemented */
                ret->save_parameters = 1;
                }
 #endif
index 30e8bfb..f68081d 100644 (file)
@@ -647,7 +647,7 @@ ECDSA       *ECDSAPublicKey_set_octet_string(ECDSA **a, const unsigned char **in, lon
                ECDSAerr(ECDSA_F_D2I_ECDSAPRIVATEKEY, ERR_R_EC_LIB);
                return 0;
        }
-       ECDSA_set_conversion_form(ret, (point_conversion_form_t)*in[0]);
+       ECDSA_set_conversion_form(ret, (point_conversion_form_t)(*in[0] & ~0x01));
        return ret;
 }