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| author | Stephan Mueller <smueller@chronox.de> | 2014-12-03 22:55:42 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2014-12-05 18:56:55 +0300 |
| commit | af8e80731a94ff9de9508b01d9e5d931d538dc6b (patch) | |
| tree | ab112b5744eeacddf7f749fe640601e55ecacf21 | |
| parent | bc84b94a715f3505f5f5981af0ec0362aa3fe38b (diff) | |
| download | linux-af8e80731a94ff9de9508b01d9e5d931d538dc6b.tar.xz | |
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>
| -rw-r--r-- | crypto/af_alg.c | 6 | ||||
| -rw-r--r-- | include/crypto/if_alg.h | 1 | ||||
| -rw-r--r-- | include/uapi/linux/if_alg.h | 2 |
3 files changed, 9 insertions, 0 deletions
diff --git a/crypto/af_alg.c b/crypto/af_alg.c index 6a3ad8011585..68ff1137dd70 100644 --- a/crypto/af_alg.c +++ b/crypto/af_alg.c @@ -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; } diff --git a/include/crypto/if_alg.h b/include/crypto/if_alg.h index d61c11170213..cd62bf4289e9 100644 --- a/include/crypto/if_alg.h +++ b/include/crypto/if_alg.h @@ -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 { diff --git a/include/uapi/linux/if_alg.h b/include/uapi/linux/if_alg.h index 0f9acce5b1ff..f2acd2fde1f3 100644 --- a/include/uapi/linux/if_alg.h +++ b/include/uapi/linux/if_alg.h @@ -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 |