gcrypt: Check file permissions of private keys.

Before opening a private key, crypt.c checks that the permissions
are restrictive enough. However, the gcrypt implementation contains
no such check. This commit adds it.

diff --git a/gcrypt.c b/gcrypt.c
index 63f8fff3e788d5166410736b6bc95d425f112f0f..3c6c1ad1d74c234f56f289a46fad98cede2a5140 100644 (file)
--- a/gcrypt.c
+++ b/gcrypt.c
@@ -782,6 +782,9 @@ int priv_decrypt(const char *key_file, unsigned char *outbuf,
        gcry_sexp_t in, out, priv_key;
        size_t nbytes;
 
+       ret = check_key_file(key_file, true);
+       if (ret < 0)
+               return ret;
        PARA_INFO_LOG("decrypting %d byte input\n", inlen);
        /* key_file -> asymmetric key priv */
        ret = get_private_key(key_file, &priv);