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crypto: af_alg - add user space interface for AEAD 

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>
wifi-calibration
Stephan Mueller 2014-12-03 20:55:42 +01:00 committed by Herbert Xu
parent bc84b94a71
commit af8e80731a
3 changed files with 9 additions and 0 deletions
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6
crypto/af_alg.c
View File

@ -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;
}

1
include/crypto/if_alg.h
View File

@ -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 {

2
include/uapi/linux/if_alg.h
View File

@ -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