Parameter copy sanity checks.

[openssl.git] / crypto / evp / p_lib.c

diff --git a/crypto/evp/p_lib.c b/crypto/evp/p_lib.c
index 0b7884f9e569d11c37059cd48e28f2464e1aa4b5..0b50d3210e551dc7d35f4b4f9f0b4249547a1657 100644 (file)
--- a/crypto/evp/p_lib.c
+++ b/crypto/evp/p_lib.c
@@ -84,6 +84,14 @@ int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
         EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_MISSING_PARAMETERS);
         goto err;
     }
+
+    if (!EVP_PKEY_missing_parameters(to)) {
+        if (EVP_PKEY_cmp_parameters(to, from) == 1)
+            return 1;
+        EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_DIFFERENT_PARAMETERS);
+        return 0;
+    }
+
     if (from->ameth && from->ameth->param_copy)
         return from->ameth->param_copy(to, from);
  err: