evp.h: add flag to distinguish AEAD ciphers and pair of control codes...

diff --git a/crypto/evp/evp.h b/crypto/evp/evp.h
index 2bfeb85e7d6526d103e0d7d1fb68ef60bd99a84f..157de07b04a89bc6f4a5aff1528c597cfb3cc24b 100644 (file)
--- a/crypto/evp/evp.h
+++ b/crypto/evp/evp.h
@@ -361,6 +361,7 @@ struct evp_cipher_st
  * as finalisation.
  */
 #define        EVP_CIPH_FLAG_CUSTOM_CIPHER     0x100000
+#define                EVP_CIPH_FLAG_AEAD_CIPHER       0x200000
 
 /* ctrl() values */
 
@@ -383,6 +384,13 @@ struct evp_cipher_st
 #define                EVP_CTRL_CCM_SET_TAG            EVP_CTRL_GCM_SET_TAG
 #define                EVP_CTRL_CCM_SET_L              0x14
 #define                EVP_CTRL_CCM_SET_MSGLEN         0x15
+/* AEAD cipher deduces payload length and returns number of bytes
+ * required to store MAC and eventual padding. Subsequent call to
+ * EVP_Cipher even appends/verifies MAC.
+ */
+#define                EVP_CTRL_AEAD_TLS1_AAD          0x16
+/* Used by composite AEAD ciphers, no-op in GCM, CCM... */
+#define                EVP_CTRL_AEAD_SET_MAC_KEY       0x17
 
 typedef struct evp_cipher_info_st
        {