crypto: af_alg - add user space interface for AEAD (af8e8073) · Commits · 戴 / test

AEAD requires the caller to specify the following information separate from the data stream. This information allows the AEAD interface handler to identify the AAD, ciphertext/plaintext and the authentication tag: * Associated authentication data of arbitrary length and length * Length of authentication tag for encryption Signed-off-by:

Stephan Mueller <smueller@chronox.de> Signed-off-by:

Herbert Xu <herbert@gondor.apana.org.au>

crypto/af_alg.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -421,6 +421,12 @@ int af_alg_cmsg_send(struct msghdr msg, struct af_alg_control con)
		con->op = (u32 )CMSG_DATA(cmsg);
		break;

		case ALG_SET_AEAD_ASSOCLEN:
		if (cmsg->cmsg_len < CMSG_LEN(sizeof(u32)))
		return -EINVAL;
		con->aead_assoclen = (u32 )CMSG_DATA(cmsg);
		break;

		default:
		return -EINVAL;
		}

include/crypto/if_alg.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -42,6 +42,7 @@ struct af_alg_completion {
		struct af_alg_control {
		struct af_alg_iv *iv;
		int op;
		unsigned int aead_assoclen;
		};

		struct af_alg_type {

include/uapi/linux/if_alg.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -32,6 +32,8 @@ struct af_alg_iv {
		#define ALG_SET_KEY 1
		#define ALG_SET_IV 2
		#define ALG_SET_OP 3
		#define ALG_SET_AEAD_ASSOCLEN 4
		#define ALG_SET_AEAD_AUTHSIZE 5

		/* Operations */
		#define ALG_OP_DECRYPT 0

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