+int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
+ {
+ if (a->type != b->type)
+ return -1;
+
+ if (EVP_PKEY_cmp_parameters(a, b) == 0)
+ return 0;
+
+ switch (a->type)
+ {
+#ifndef OPENSSL_NO_RSA
+ case EVP_PKEY_RSA:
+ if (BN_cmp(b->pkey.rsa->n,a->pkey.rsa->n) != 0
+ || BN_cmp(b->pkey.rsa->e,a->pkey.rsa->e) != 0)
+ return 0;
+ break;
+#endif
+#ifndef OPENSSL_NO_DSA
+ case EVP_PKEY_DSA:
+ if (BN_cmp(b->pkey.dsa->pub_key,a->pkey.dsa->pub_key) != 0)
+ return 0;
+ break;
+#endif
+#ifndef OPENSSL_NO_EC
+ case EVP_PKEY_EC:
+ {
+ int r;
+ const EC_GROUP *group = EC_KEY_get0_group(b->pkey.ec);
+ const EC_POINT *pa = EC_KEY_get0_public_key(a->pkey.ec),
+ *pb = EC_KEY_get0_public_key(b->pkey.ec);
+ r = EC_POINT_cmp(group, pa, pb, NULL);
+ if (r != 0)
+ {
+ if (r == 1)
+ return 0;
+ else
+ return -2;
+ }
+ }
+ break;
+#endif
+#ifndef OPENSSL_NO_DH
+ case EVP_PKEY_DH:
+ return -2;
+#endif
+ default:
+ return -2;
+ }
+
+ return 1;
+ }
+