Since DTLS 1.0 is based on TLS 1.1 we should never return a decryption_failed

alert.

ssl/d1_enc.c

@@ -231,11 +231,7 @@ int dtls1_enc(SSL *s, int send)
 		if (!send)
 			{
 			if (l == 0 || l%bs != 0)
-				{
-				SSLerr(SSL_F_DTLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
-				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
-				return 0;
-				}
+				return -1;
 			}
 		
 		EVP_Cipher(ds,rec->data,rec->input,l);

ssl/d1_pkt.c

@@ -414,7 +414,8 @@ dtls1_process_record(SSL *s)
 			goto err;
 
 		/* otherwise enc_err == -1 */
-		goto err;
+		al=SSL_AD_BAD_RECORD_MAC;
+		goto f_err;
 		}
 
 #ifdef TLS_DEBUG