doc update

diff --git a/lib/gnutls_pubkey.c b/lib/gnutls_pubkey.c
index 99d5f24a5e3ec8dc1d01a07a319bb11165b18449..b8b8ce5be7686f27bb32b313db0f8874f5f1032e 100644 (file)
--- a/lib/gnutls_pubkey.c
+++ b/lib/gnutls_pubkey.c
@@ -1691,6 +1691,10 @@ gnutls_pubkey_encrypt_data(gnutls_pubkey_t key, unsigned int flags,
  * This function will read the certifcate and the signed data to
  * determine the hash algorithm used to generate the signature.
  *
+ * This function is only for informative purposes, as it does not
+ * return a cryptographically binding result. Modifications to the signature
+ * may cause this function to return an incorrect result.
+ *
  * Returns: On success, %GNUTLS_E_SUCCESS (0) is returned, otherwise a
  *   negative error value.
  *