/*ARGSUSED*/
static int
skein_update(crypto_ctx_t *ctx, crypto_data_t *data, crypto_req_handle_t req)
{
int error = CRYPTO_SUCCESS;
ASSERT(SKEIN_CTX(ctx) != NULL);
switch (data->cd_format) {
case CRYPTO_DATA_RAW:
SKEIN_OP(SKEIN_CTX(ctx), Update,
(uint8_t *)data->cd_raw.iov_base + data->cd_offset,
data->cd_length);
break;
case CRYPTO_DATA_UIO:
error = skein_digest_update_uio(SKEIN_CTX(ctx), data);
break;
case CRYPTO_DATA_MBLK:
error = skein_digest_update_mblk(SKEIN_CTX(ctx), data);
break;
default:
error = CRYPTO_ARGUMENTS_BAD;
}
return (error);
}
/*
* Initializes a skein digest context to the configuration in `mechanism'.
* The mechanism cm_type must be one of SKEIN_*_MECH_INFO_TYPE. The cm_param
* field may contain a skein_param_t structure indicating the length of the
* digest the algorithm should produce. Otherwise the default output lengths
* are applied (32 bytes for Skein-256, 64 bytes for Skein-512 and 128 bytes
* for Skein-1024).
*/
static int
skein_digest_init(crypto_ctx_t *ctx, crypto_mechanism_t *mechanism,
crypto_req_handle_t req)
{
int error = CRYPTO_SUCCESS;
if (!VALID_SKEIN_DIGEST_MECH(mechanism->cm_type))
return (CRYPTO_MECHANISM_INVALID);
SKEIN_CTX_LVALUE(ctx) = kmem_alloc(sizeof (*SKEIN_CTX(ctx)),
crypto_kmflag(req));
if (SKEIN_CTX(ctx) == NULL)
return (CRYPTO_HOST_MEMORY);
SKEIN_CTX(ctx)->sc_mech_type = mechanism->cm_type;
error = skein_get_digest_bitlen(mechanism,
&SKEIN_CTX(ctx)->sc_digest_bitlen);
if (error != CRYPTO_SUCCESS)
goto errout;
SKEIN_OP(SKEIN_CTX(ctx), Init, SKEIN_CTX(ctx)->sc_digest_bitlen);
return (CRYPTO_SUCCESS);
errout:
bzero(SKEIN_CTX(ctx), sizeof (*SKEIN_CTX(ctx)));
kmem_free(SKEIN_CTX(ctx), sizeof (*SKEIN_CTX(ctx)));
SKEIN_CTX_LVALUE(ctx) = NULL;
return (error);
}
/*
* Initializes a skein MAC context. You may pass a ctx_template, in which
* case the template will be reused to make initialization more efficient.
* Otherwise a new context will be constructed. The mechanism cm_type must
* be one of SKEIN_*_MAC_MECH_INFO_TYPE. Same as in skein_digest_init, you
* may pass a skein_param_t in cm_param to configure the length of the
* digest. The key must be in raw format.
*/
static int
skein_mac_init(crypto_ctx_t *ctx, crypto_mechanism_t *mechanism,
crypto_key_t *key, crypto_spi_ctx_template_t ctx_template,
crypto_req_handle_t req)
{
int error;
SKEIN_CTX_LVALUE(ctx) = kmem_alloc(sizeof (*SKEIN_CTX(ctx)),
crypto_kmflag(req));
if (SKEIN_CTX(ctx) == NULL)
return (CRYPTO_HOST_MEMORY);
if (ctx_template != NULL) {
bcopy(ctx_template, SKEIN_CTX(ctx),
sizeof (*SKEIN_CTX(ctx)));
} else {
error = skein_mac_ctx_build(SKEIN_CTX(ctx), mechanism, key);
if (error != CRYPTO_SUCCESS)
goto errout;
}
return (CRYPTO_SUCCESS);
errout:
bzero(SKEIN_CTX(ctx), sizeof (*SKEIN_CTX(ctx)));
kmem_free(SKEIN_CTX(ctx), sizeof (*SKEIN_CTX(ctx)));
return (error);
}
/*
* Frees a skein context in a parent crypto context.
*/
static int
skein_free_context(crypto_ctx_t *ctx)
{
if (SKEIN_CTX(ctx) != NULL) {
bzero(SKEIN_CTX(ctx), sizeof (*SKEIN_CTX(ctx)));
kmem_free(SKEIN_CTX(ctx), sizeof (*SKEIN_CTX(ctx)));
SKEIN_CTX_LVALUE(ctx) = NULL;
}
return (CRYPTO_SUCCESS);
}
/*
* Executes a skein_update and skein_digest on a pre-initialized crypto
* context in a single step. See the documentation to these functions to
* see what to pass here.
*/
static int
skein_digest(crypto_ctx_t *ctx, crypto_data_t *data, crypto_data_t *digest,
crypto_req_handle_t req)
{
int error = CRYPTO_SUCCESS;
ASSERT(SKEIN_CTX(ctx) != NULL);
if (digest->cd_length <
CRYPTO_BITS2BYTES(SKEIN_CTX(ctx)->sc_digest_bitlen)) {
digest->cd_length =
CRYPTO_BITS2BYTES(SKEIN_CTX(ctx)->sc_digest_bitlen);
return (CRYPTO_BUFFER_TOO_SMALL);
}
error = skein_update(ctx, data, req);
if (error != CRYPTO_SUCCESS) {
bzero(SKEIN_CTX(ctx), sizeof (*SKEIN_CTX(ctx)));
kmem_free(SKEIN_CTX(ctx), sizeof (*SKEIN_CTX(ctx)));
SKEIN_CTX_LVALUE(ctx) = NULL;
digest->cd_length = 0;
return (error);
}
error = skein_final(ctx, digest, req);
return (error);
}
/*ARGSUSED*/
static int
skein_final(crypto_ctx_t *ctx, crypto_data_t *digest, crypto_req_handle_t req)
{
int error = CRYPTO_SUCCESS;
ASSERT(SKEIN_CTX(ctx) != NULL);
if (digest->cd_length <
CRYPTO_BITS2BYTES(SKEIN_CTX(ctx)->sc_digest_bitlen)) {
digest->cd_length =
CRYPTO_BITS2BYTES(SKEIN_CTX(ctx)->sc_digest_bitlen);
return (CRYPTO_BUFFER_TOO_SMALL);
}
switch (digest->cd_format) {
case CRYPTO_DATA_RAW:
SKEIN_OP(SKEIN_CTX(ctx), Final,
(uint8_t *)digest->cd_raw.iov_base + digest->cd_offset);
break;
case CRYPTO_DATA_UIO:
error = skein_digest_final_uio(SKEIN_CTX(ctx), digest, req);
break;
default:
error = CRYPTO_ARGUMENTS_BAD;
}
if (error == CRYPTO_SUCCESS)
digest->cd_length =
CRYPTO_BITS2BYTES(SKEIN_CTX(ctx)->sc_digest_bitlen);
else
digest->cd_length = 0;
bzero(SKEIN_CTX(ctx), sizeof (*SKEIN_CTX(ctx)));
kmem_free(SKEIN_CTX(ctx), sizeof (*(SKEIN_CTX(ctx))));
SKEIN_CTX_LVALUE(ctx) = NULL;
return (error);
}
