(struct nettle_aead): Tentative interface for

authenticated encryption with associated data.

Rev: nettle/nettle-internal.h:1.3

diff --git a/nettle-internal.h b/nettle-internal.h
index c5b1b532b252db69b60f4a39876850337b59dbb0..bead0513b942bb4c94713f9e5cc09b59e2544a03 100644 (file)
--- a/nettle-internal.h
+++ b/nettle-internal.h
@@ -74,4 +74,54 @@ extern const struct nettle_cipher nettle_openssl_cast128;
 extern const struct nettle_hash nettle_openssl_md5;
 extern const struct nettle_hash nettle_openssl_sha1;
 
+/* Tentative interface for "authenticated encryption with associated
+   data" algorithms. Should be moved to nettle-meta.h when stable. */
+struct nettle_aead
+{
+  const char *name;
+  
+  unsigned context_size;
+  /* Block size of the input, and the size of the output digest */
+  unsigned block_size;
+
+  /* Suggested key size; other sizes are sometimes possible. */
+  unsigned key_size;
+
+  nettle_set_key_func *set_key;
+  nettle_set_key_func *set_iv;
+  nettle_hash_update_func *update;
+  nettle_crypt_func *encrypt;
+  nettle_crypt_func *decrypt;
+  nettle_hash_digest_func *digest;
+};
+
+#define _NETTLE_AEAD(type, TYPE, name, key_size) {     \
+  #type "-" #name #key_size,                           \
+  sizeof(struct type##_##name##_ctx),                  \
+  TYPE##_BLOCK_SIZE,                                   \
+  key_size / 8,                                                \
+  (nettle_set_key_func *) type##_##name##_set_key,     \
+  (nettle_set_key_func *) type##_##name##_set_iv,      \
+  (nettle_hash_update_func *) type##_##name##_update,  \
+  (nettle_crypt_func *) type##_##name##_encrypt,       \
+  (nettle_crypt_func *) type##_##name##_decrypt,       \
+  (nettle_hash_digest_func *) type##_##name##_digest,  \
+}
+
+const struct nettle_aead nettle_gcm_aes128;
+const struct nettle_aead nettle_gcm_aes192;
+const struct nettle_aead nettle_gcm_aes256;
+
+const struct nettle_aead nettle_gcm_camellia128;
+const struct nettle_aead nettle_gcm_camellia192;
+const struct nettle_aead nettle_gcm_camellia256;
+
+const struct nettle_aead nettle_gcm_serpent128;
+const struct nettle_aead nettle_gcm_serpent192;
+const struct nettle_aead nettle_gcm_serpent256;
+
+const struct nettle_aead nettle_gcm_twofish128;
+const struct nettle_aead nettle_gcm_twofish192;
+const struct nettle_aead nettle_gcm_twofish256;
+
 #endif /* NETTLE_INTERNAL_H_INCLUDED */