Commit 78a0324f authored Apr 11, 2019 by Vitaly Chikunov Committed by Herbert Xu Apr 18, 2019

crypto: akcipher - default implementations for request callbacks



Because with the introduction of EC-RDSA and change in workings of RSA
in regard to sign/verify, akcipher could have not all callbacks defined,
check the presence of callbacks in crypto_register_akcipher() and
provide default implementation if the callback is not implemented.

This is suggested by Herbert Xu instead of checking the presence of the
callback on every request.

Signed-off-by: Vitaly Chikunov <vt@altlinux.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

parent 3c2bc636

crypto/akcipher.c

+14 −0

Original line number	Diff line number	Diff line
		@@ -119,10 +119,24 @@ static void akcipher_prepare_alg(struct akcipher_alg *alg)
		base->cra_flags \|= CRYPTO_ALG_TYPE_AKCIPHER;
		}

		static int akcipher_default_op(struct akcipher_request *req)
		{
		return -ENOSYS;
		}

		int crypto_register_akcipher(struct akcipher_alg *alg)
		{
		struct crypto_alg *base = &alg->base;

		if (!alg->sign)
		alg->sign = akcipher_default_op;
		if (!alg->verify)
		alg->verify = akcipher_default_op;
		if (!alg->encrypt)
		alg->encrypt = akcipher_default_op;
		if (!alg->decrypt)
		alg->decrypt = akcipher_default_op;

		akcipher_prepare_alg(alg);
		return crypto_register_alg(base);
		}