Commit 15acabfd authored by Stephan Mueller's avatar Stephan Mueller Committed by Herbert Xu
Browse files

crypto: aead - add check for presence of auth tag 



The AEAD decryption operation requires the authentication tag to be
present as part of the cipher text buffer. The added check verifies that
the caller provides a cipher text with at least the authentication tag.

Signed-off-by: default avatarStephan Mueller <smueller@chronox.de>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 42d2e780

include/linux/crypto.h

+3 −0
Original line number Diff line number Diff line
@@ -1412,6 +1412,9 @@ static inline int crypto_aead_encrypt(struct aead_request *req) 
 */

static inline int crypto_aead_decrypt(struct aead_request *req)

{

	if (req->cryptlen < crypto_aead_authsize(crypto_aead_reqtfm(req)))

		return -EINVAL;



	return crypto_aead_crt(crypto_aead_reqtfm(req))->decrypt(req);

}