From da81214cec87201dc18c0ce71224367e13a6edfb Mon Sep 17 00:00:00 2001 From: Michael Brown Date: Mon, 24 Oct 2022 19:20:41 +0100 Subject: [crypto] Add concept of authentication tag to cipher algorithms Some ciphers (such as GCM) support the concept of a tag that can be used to authenticate the encrypted data. Add a cipher method for generating an authentication tag. Signed-off-by: Michael Brown --- src/crypto/crypto_null.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'src/crypto/crypto_null.c') diff --git a/src/crypto/crypto_null.c b/src/crypto/crypto_null.c index ef6041b5b..26cfbfc4e 100644 --- a/src/crypto/crypto_null.c +++ b/src/crypto/crypto_null.c @@ -76,14 +76,20 @@ void cipher_null_decrypt ( void *ctx __unused, const void *src, void *dst, memcpy ( dst, src, len ); } +void cipher_null_auth ( void *ctx __unused, void *auth __unused ) { + /* Do nothing */ +} + struct cipher_algorithm cipher_null = { .name = "null", .ctxsize = 0, .blocksize = 1, + .authsize = 0, .setkey = cipher_null_setkey, .setiv = cipher_null_setiv, .encrypt = cipher_null_encrypt, .decrypt = cipher_null_decrypt, + .auth = cipher_null_auth, }; int pubkey_null_init ( void *ctx __unused, const void *key __unused, -- cgit v1.2.3-55-g7522