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icp: remove digest entry points 

For whatever reason, we call digest mechanisms directly, not through the
KCF digest provider. So we can remove those entry points entirely.

Sponsored-by: Klara, Inc.
Sponsored-by: Wasabi Technology, Inc.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <rob.norris@klarasystems.com>
Closes #16209
This commit is contained in:
Rob Norris 2024-05-19 12:58:56 +10:00 committed by Brian Behlendorf
parent 94f1e56e41
commit 1291c46ea4
7 changed files with 8 additions and 464 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
include/sys/skein.h
View File

@ -152,25 +152,16 @@ typedef struct skein_param {
/* Module definitions */
#ifdef SKEIN_MODULE_IMPL
#define CKM_SKEIN_256 "CKM_SKEIN_256"
#define CKM_SKEIN_512 "CKM_SKEIN_512"
#define CKM_SKEIN1024 "CKM_SKEIN1024"
#define CKM_SKEIN_256_MAC "CKM_SKEIN_256_MAC"
#define CKM_SKEIN_512_MAC "CKM_SKEIN_512_MAC"
#define CKM_SKEIN1024_MAC "CKM_SKEIN1024_MAC"
typedef enum skein_mech_type {
SKEIN_256_MECH_INFO_TYPE,
SKEIN_512_MECH_INFO_TYPE,
SKEIN1024_MECH_INFO_TYPE,
SKEIN_256_MAC_MECH_INFO_TYPE,
SKEIN_512_MAC_MECH_INFO_TYPE,
SKEIN1024_MAC_MECH_INFO_TYPE
} skein_mech_type_t;
#define VALID_SKEIN_DIGEST_MECH(__mech) \
((int)(__mech) >= SKEIN_256_MECH_INFO_TYPE && \
(__mech) <= SKEIN1024_MECH_INFO_TYPE)
#define VALID_SKEIN_MAC_MECH(__mech) \
((int)(__mech) >= SKEIN_256_MAC_MECH_INFO_TYPE && \
(__mech) <= SKEIN1024_MAC_MECH_INFO_TYPE)

7
module/icp/core/kcf_mech_tabs.c
View File

@ -41,7 +41,6 @@
* mech_index is the index for that mechanism in the table.
* A mechanism belongs to exactly 1 table.
* The tables are:
* . digest_mechs_tab[] for the msg digest mechs.
* . cipher_mechs_tab[] for encrypt/decrypt and wrap/unwrap mechs.
* . mac_mechs_tab[] for MAC mechs.
* . sign_mechs_tab[] for sign & verify mechs.
@ -75,13 +74,11 @@
/* RFE 4687834 Will deal with the extensibility of these tables later */
static kcf_mech_entry_t kcf_digest_mechs_tab[KCF_MAXDIGEST];
static kcf_mech_entry_t kcf_cipher_mechs_tab[KCF_MAXCIPHER];
static kcf_mech_entry_t kcf_mac_mechs_tab[KCF_MAXMAC];
const kcf_mech_entry_tab_t kcf_mech_tabs_tab[KCF_LAST_OPSCLASS + 1] = {
{0, NULL}, /* No class zero */
{KCF_MAXDIGEST, kcf_digest_mechs_tab},
{KCF_MAXCIPHER, kcf_cipher_mechs_tab},
{KCF_MAXMAC, kcf_mac_mechs_tab},
};
@ -220,9 +217,7 @@ kcf_add_mech_provider(short mech_indx,
crypto_func_group_t fg = mech_info->cm_func_group_mask;
kcf_ops_class_t class;
if (fg & CRYPTO_FG_DIGEST || fg & CRYPTO_FG_DIGEST_ATOMIC)
class = KCF_DIGEST_CLASS;
else if (fg & CRYPTO_FG_ENCRYPT_ATOMIC ||
if (fg & CRYPTO_FG_ENCRYPT_ATOMIC ||
fg & CRYPTO_FG_DECRYPT_ATOMIC)
class = KCF_CIPHER_CLASS;
else if (fg & CRYPTO_FG_MAC || fg & CRYPTO_FG_MAC_ATOMIC)

7
module/icp/include/sys/crypto/impl.h
View File

@ -55,7 +55,7 @@ extern "C" {
* When impl.h is broken up (bug# 4703218), this will be done. For now,
* we hardcode these values.
*/
#define KCF_OPS_CLASSSIZE 4
#define KCF_OPS_CLASSSIZE 3
#define KCF_MAXMECHTAB 32
/*
@ -200,12 +200,11 @@ _Static_assert(KCF_MAXCIPHER == KCF_MAXMECHTAB,
"KCF_MAXCIPHER != KCF_MAXMECHTAB"); /* See KCF_MAXMECHTAB comment */
typedef enum {
KCF_DIGEST_CLASS = 1,
KCF_CIPHER_CLASS,
KCF_CIPHER_CLASS = 1,
KCF_MAC_CLASS,
} kcf_ops_class_t;
#define KCF_FIRST_OPSCLASS KCF_DIGEST_CLASS
#define KCF_FIRST_OPSCLASS KCF_CIPHER_CLASS
#define KCF_LAST_OPSCLASS KCF_MAC_CLASS
_Static_assert(
KCF_OPS_CLASSSIZE == (KCF_LAST_OPSCLASS - KCF_FIRST_OPSCLASS + 2),

19
module/icp/include/sys/crypto/spi.h
View File

@ -66,22 +66,6 @@ typedef struct crypto_ctx {
void *cc_framework_private; /* owned by framework */
} crypto_ctx_t;
/*
* The crypto_digest_ops structure contains pointers to digest
* operations for cryptographic providers. It is passed through
* the crypto_ops(9S) structure when providers register with the
* kernel using crypto_register_provider(9F).
*/
typedef struct crypto_digest_ops {
int (*digest_init)(crypto_ctx_t *, crypto_mechanism_t *);
int (*digest)(crypto_ctx_t *, crypto_data_t *, crypto_data_t *);
int (*digest_update)(crypto_ctx_t *, crypto_data_t *);
int (*digest_key)(crypto_ctx_t *, crypto_key_t *);
int (*digest_final)(crypto_ctx_t *, crypto_data_t *);
int (*digest_atomic)(crypto_mechanism_t *, crypto_data_t *,
crypto_data_t *);
} __no_const crypto_digest_ops_t;
/*
* The crypto_cipher_ops structure contains pointers to encryption
* and decryption operations for cryptographic providers. It is
@ -137,7 +121,6 @@ typedef struct crypto_ctx_ops {
* by calling crypto_register_provider(9F).
*/
typedef struct crypto_ops {
const crypto_digest_ops_t *co_digest_ops;
const crypto_cipher_ops_t *co_cipher_ops;
const crypto_mac_ops_t *co_mac_ops;
const crypto_ctx_ops_t *co_ctx_ops;
@ -153,12 +136,10 @@ typedef struct crypto_ops {
typedef uint32_t crypto_func_group_t;
#define CRYPTO_FG_DIGEST 0x00000004 /* digest_init() */
#define CRYPTO_FG_MAC 0x00001000 /* mac_init() */
#define CRYPTO_FG_ENCRYPT_ATOMIC 0x00008000 /* encrypt_atomic() */
#define CRYPTO_FG_DECRYPT_ATOMIC 0x00010000 /* decrypt_atomic() */
#define CRYPTO_FG_MAC_ATOMIC 0x00020000 /* mac_atomic() */
#define CRYPTO_FG_DIGEST_ATOMIC 0x00040000 /* digest_atomic() */
/*
* Maximum length of the pi_provider_description field of the

1
module/icp/io/aes.c
View File

@ -72,7 +72,6 @@ static const crypto_ctx_ops_t aes_ctx_ops = {
};
static const crypto_ops_t aes_crypto_ops = {
NULL,
&aes_cipher_ops,
NULL,
&aes_ctx_ops,

286
module/icp/io/sha2_mod.c
View File

@ -61,8 +61,7 @@
*/
static const crypto_mech_info_t sha2_mech_info_tab[] = {
/* SHA256 */
{SUN_CKM_SHA256, SHA256_MECH_INFO_TYPE,
CRYPTO_FG_DIGEST | CRYPTO_FG_DIGEST_ATOMIC},
{SUN_CKM_SHA256, SHA256_MECH_INFO_TYPE, 0},
/* SHA256-HMAC */
{SUN_CKM_SHA256_HMAC, SHA256_HMAC_MECH_INFO_TYPE,
CRYPTO_FG_MAC | CRYPTO_FG_MAC_ATOMIC},
@ -70,8 +69,7 @@ static const crypto_mech_info_t sha2_mech_info_tab[] = {
{SUN_CKM_SHA256_HMAC_GENERAL, SHA256_HMAC_GEN_MECH_INFO_TYPE,
CRYPTO_FG_MAC | CRYPTO_FG_MAC_ATOMIC},
/* SHA384 */
{SUN_CKM_SHA384, SHA384_MECH_INFO_TYPE,
CRYPTO_FG_DIGEST | CRYPTO_FG_DIGEST_ATOMIC},
{SUN_CKM_SHA384, SHA384_MECH_INFO_TYPE, 0},
/* SHA384-HMAC */
{SUN_CKM_SHA384_HMAC, SHA384_HMAC_MECH_INFO_TYPE,
CRYPTO_FG_MAC | CRYPTO_FG_MAC_ATOMIC},
@ -79,8 +77,7 @@ static const crypto_mech_info_t sha2_mech_info_tab[] = {
{SUN_CKM_SHA384_HMAC_GENERAL, SHA384_HMAC_GEN_MECH_INFO_TYPE,
CRYPTO_FG_MAC | CRYPTO_FG_MAC_ATOMIC},
/* SHA512 */
{SUN_CKM_SHA512, SHA512_MECH_INFO_TYPE,
CRYPTO_FG_DIGEST | CRYPTO_FG_DIGEST_ATOMIC},
{SUN_CKM_SHA512, SHA512_MECH_INFO_TYPE, 0},
/* SHA512-HMAC */
{SUN_CKM_SHA512_HMAC, SHA512_HMAC_MECH_INFO_TYPE,
CRYPTO_FG_MAC | CRYPTO_FG_MAC_ATOMIC},
@ -89,21 +86,6 @@ static const crypto_mech_info_t sha2_mech_info_tab[] = {
CRYPTO_FG_MAC | CRYPTO_FG_MAC_ATOMIC},
};
static int sha2_digest_init(crypto_ctx_t *, crypto_mechanism_t *);
static int sha2_digest(crypto_ctx_t *, crypto_data_t *, crypto_data_t *);
static int sha2_digest_update(crypto_ctx_t *, crypto_data_t *);
static int sha2_digest_final(crypto_ctx_t *, crypto_data_t *);
static int sha2_digest_atomic(crypto_mechanism_t *, crypto_data_t *,
crypto_data_t *);
static const crypto_digest_ops_t sha2_digest_ops = {
.digest_init = sha2_digest_init,
.digest = sha2_digest,
.digest_update = sha2_digest_update,
.digest_final = sha2_digest_final,
.digest_atomic = sha2_digest_atomic
};
static int sha2_mac_init(crypto_ctx_t *, crypto_mechanism_t *, crypto_key_t *,
crypto_spi_ctx_template_t);
static int sha2_mac_update(crypto_ctx_t *, crypto_data_t *);
@ -132,7 +114,6 @@ static const crypto_ctx_ops_t sha2_ctx_ops = {
};
static const crypto_ops_t sha2_crypto_ops = {
&sha2_digest_ops,
NULL,
&sha2_mac_ops,
&sha2_ctx_ops,
@ -184,27 +165,6 @@ sha2_mod_fini(void)
return (ret);
}
/*
* KCF software provider digest entry points.
*/
static int
sha2_digest_init(crypto_ctx_t *ctx, crypto_mechanism_t *mechanism)
{
/*
* Allocate and initialize SHA2 context.
*/
ctx->cc_provider_private = kmem_alloc(sizeof (sha2_ctx_t), KM_SLEEP);
if (ctx->cc_provider_private == NULL)
return (CRYPTO_HOST_MEMORY);
PROV_SHA2_CTX(ctx)->sc_mech_type = mechanism->cm_type;
SHA2Init(mechanism->cm_type, &PROV_SHA2_CTX(ctx)->sc_sha2_ctx);
return (CRYPTO_SUCCESS);
}
/*
* Helper SHA2 digest update function for uio data.
*/
@ -360,246 +320,6 @@ sha2_digest_final_uio(SHA2_CTX *sha2_ctx, crypto_data_t *digest,
return (CRYPTO_SUCCESS);
}
static int
sha2_digest(crypto_ctx_t *ctx, crypto_data_t *data, crypto_data_t *digest)
{
int ret = CRYPTO_SUCCESS;
uint_t sha_digest_len;
ASSERT(ctx->cc_provider_private != NULL);
switch (PROV_SHA2_CTX(ctx)->sc_mech_type) {
case SHA256_MECH_INFO_TYPE:
sha_digest_len = SHA256_DIGEST_LENGTH;
break;
case SHA384_MECH_INFO_TYPE:
sha_digest_len = SHA384_DIGEST_LENGTH;
break;
case SHA512_MECH_INFO_TYPE:
sha_digest_len = SHA512_DIGEST_LENGTH;
break;
default:
return (CRYPTO_MECHANISM_INVALID);
}
/*
* We need to just return the length needed to store the output.
* We should not destroy the context for the following cases.
*/
if ((digest->cd_length == 0) ||
(digest->cd_length < sha_digest_len)) {
digest->cd_length = sha_digest_len;
return (CRYPTO_BUFFER_TOO_SMALL);
}
/*
* Do the SHA2 update on the specified input data.
*/
switch (data->cd_format) {
case CRYPTO_DATA_RAW:
SHA2Update(&PROV_SHA2_CTX(ctx)->sc_sha2_ctx,
(uint8_t *)data->cd_raw.iov_base + data->cd_offset,
data->cd_length);
break;
case CRYPTO_DATA_UIO:
ret = sha2_digest_update_uio(&PROV_SHA2_CTX(ctx)->sc_sha2_ctx,
data);
break;
default:
ret = CRYPTO_ARGUMENTS_BAD;
}
if (ret != CRYPTO_SUCCESS) {
/* the update failed, free context and bail */
kmem_free(ctx->cc_provider_private, sizeof (sha2_ctx_t));
ctx->cc_provider_private = NULL;
digest->cd_length = 0;
return (ret);
}
/*
* Do a SHA2 final, must be done separately since the digest
* type can be different than the input data type.
*/
switch (digest->cd_format) {
case CRYPTO_DATA_RAW:
SHA2Final((unsigned char *)digest->cd_raw.iov_base +
digest->cd_offset, &PROV_SHA2_CTX(ctx)->sc_sha2_ctx);
break;
case CRYPTO_DATA_UIO:
ret = sha2_digest_final_uio(&PROV_SHA2_CTX(ctx)->sc_sha2_ctx,
digest, sha_digest_len, NULL);
break;
default:
ret = CRYPTO_ARGUMENTS_BAD;
}
/* all done, free context and return */
if (ret == CRYPTO_SUCCESS)
digest->cd_length = sha_digest_len;
else
digest->cd_length = 0;
kmem_free(ctx->cc_provider_private, sizeof (sha2_ctx_t));
ctx->cc_provider_private = NULL;
return (ret);
}
static int
sha2_digest_update(crypto_ctx_t *ctx, crypto_data_t *data)
{
int ret = CRYPTO_SUCCESS;
ASSERT(ctx->cc_provider_private != NULL);
/*
* Do the SHA2 update on the specified input data.
*/
switch (data->cd_format) {
case CRYPTO_DATA_RAW:
SHA2Update(&PROV_SHA2_CTX(ctx)->sc_sha2_ctx,
(uint8_t *)data->cd_raw.iov_base + data->cd_offset,
data->cd_length);
break;
case CRYPTO_DATA_UIO:
ret = sha2_digest_update_uio(&PROV_SHA2_CTX(ctx)->sc_sha2_ctx,
data);
break;
default:
ret = CRYPTO_ARGUMENTS_BAD;
}
return (ret);
}
static int
sha2_digest_final(crypto_ctx_t *ctx, crypto_data_t *digest)
{
int ret = CRYPTO_SUCCESS;
uint_t sha_digest_len;
ASSERT(ctx->cc_provider_private != NULL);
switch (PROV_SHA2_CTX(ctx)->sc_mech_type) {
case SHA256_MECH_INFO_TYPE:
sha_digest_len = SHA256_DIGEST_LENGTH;
break;
case SHA384_MECH_INFO_TYPE:
sha_digest_len = SHA384_DIGEST_LENGTH;
break;
case SHA512_MECH_INFO_TYPE:
sha_digest_len = SHA512_DIGEST_LENGTH;
break;
default:
return (CRYPTO_MECHANISM_INVALID);
}
/*
* We need to just return the length needed to store the output.
* We should not destroy the context for the following cases.
*/
if ((digest->cd_length == 0) ||
(digest->cd_length < sha_digest_len)) {
digest->cd_length = sha_digest_len;
return (CRYPTO_BUFFER_TOO_SMALL);
}
/*
* Do a SHA2 final.
*/
switch (digest->cd_format) {
case CRYPTO_DATA_RAW:
SHA2Final((unsigned char *)digest->cd_raw.iov_base +
digest->cd_offset, &PROV_SHA2_CTX(ctx)->sc_sha2_ctx);
break;
case CRYPTO_DATA_UIO:
ret = sha2_digest_final_uio(&PROV_SHA2_CTX(ctx)->sc_sha2_ctx,
digest, sha_digest_len, NULL);
break;
default:
ret = CRYPTO_ARGUMENTS_BAD;
}
/* all done, free context and return */
if (ret == CRYPTO_SUCCESS)
digest->cd_length = sha_digest_len;
else
digest->cd_length = 0;
kmem_free(ctx->cc_provider_private, sizeof (sha2_ctx_t));
ctx->cc_provider_private = NULL;
return (ret);
}
static int
sha2_digest_atomic(crypto_mechanism_t *mechanism, crypto_data_t *data,
crypto_data_t *digest)
{
int ret = CRYPTO_SUCCESS;
SHA2_CTX sha2_ctx;
uint32_t sha_digest_len;
/*
* Do the SHA inits.
*/
SHA2Init(mechanism->cm_type, &sha2_ctx);
switch (data->cd_format) {
case CRYPTO_DATA_RAW:
SHA2Update(&sha2_ctx, (uint8_t *)data->
cd_raw.iov_base + data->cd_offset, data->cd_length);
break;
case CRYPTO_DATA_UIO:
ret = sha2_digest_update_uio(&sha2_ctx, data);
break;
default:
ret = CRYPTO_ARGUMENTS_BAD;
}
/*
* Do the SHA updates on the specified input data.
*/
if (ret != CRYPTO_SUCCESS) {
/* the update failed, bail */
digest->cd_length = 0;
return (ret);
}
if (mechanism->cm_type <= SHA256_HMAC_GEN_MECH_INFO_TYPE)
sha_digest_len = SHA256_DIGEST_LENGTH;
else
sha_digest_len = SHA512_DIGEST_LENGTH;
/*
* Do a SHA2 final, must be done separately since the digest
* type can be different than the input data type.
*/
switch (digest->cd_format) {
case CRYPTO_DATA_RAW:
SHA2Final((unsigned char *)digest->cd_raw.iov_base +
digest->cd_offset, &sha2_ctx);
break;
case CRYPTO_DATA_UIO:
ret = sha2_digest_final_uio(&sha2_ctx, digest,
sha_digest_len, NULL);
break;
default:
ret = CRYPTO_ARGUMENTS_BAD;
}
if (ret == CRYPTO_SUCCESS)
digest->cd_length = sha_digest_len;
else
digest->cd_length = 0;
return (ret);
}
/*
* KCF software provider mac entry points.
*

143
module/icp/io/skein_mod.c
View File

@ -31,34 +31,16 @@
#include <sys/skein.h>
static const crypto_mech_info_t skein_mech_info_tab[] = {
{CKM_SKEIN_256, SKEIN_256_MECH_INFO_TYPE,
CRYPTO_FG_DIGEST | CRYPTO_FG_DIGEST_ATOMIC},
{CKM_SKEIN_256_MAC, SKEIN_256_MAC_MECH_INFO_TYPE,
CRYPTO_FG_MAC | CRYPTO_FG_MAC_ATOMIC},
{CKM_SKEIN_512, SKEIN_512_MECH_INFO_TYPE,
CRYPTO_FG_DIGEST | CRYPTO_FG_DIGEST_ATOMIC},
{CKM_SKEIN_512_MAC, SKEIN_512_MAC_MECH_INFO_TYPE,
CRYPTO_FG_MAC | CRYPTO_FG_MAC_ATOMIC},
{CKM_SKEIN1024, SKEIN1024_MECH_INFO_TYPE,
CRYPTO_FG_DIGEST | CRYPTO_FG_DIGEST_ATOMIC},
{CKM_SKEIN1024_MAC, SKEIN1024_MAC_MECH_INFO_TYPE,
CRYPTO_FG_MAC | CRYPTO_FG_MAC_ATOMIC},
};
static int skein_digest_init(crypto_ctx_t *, crypto_mechanism_t *);
static int skein_digest(crypto_ctx_t *, crypto_data_t *, crypto_data_t *);
static int skein_update(crypto_ctx_t *, crypto_data_t *);
static int skein_final(crypto_ctx_t *, crypto_data_t *);
static int skein_digest_atomic(crypto_mechanism_t *, crypto_data_t *,
crypto_data_t *);
static const crypto_digest_ops_t skein_digest_ops = {
.digest_init = skein_digest_init,
.digest = skein_digest,
.digest_update = skein_update,
.digest_final = skein_final,
.digest_atomic = skein_digest_atomic
};
static int skein_mac_init(crypto_ctx_t *, crypto_mechanism_t *, crypto_key_t *,
crypto_spi_ctx_template_t);
@ -84,7 +66,6 @@ static const crypto_ctx_ops_t skein_ctx_ops = {
};
static const crypto_ops_t skein_crypto_ops = {
&skein_digest_ops,
NULL,
&skein_mac_ops,
&skein_ctx_ops,
@ -115,15 +96,12 @@ typedef struct skein_ctx {
do { \
skein_ctx_t *sc = (_skein_ctx); \
switch (sc->sc_mech_type) { \
case SKEIN_256_MECH_INFO_TYPE: \
case SKEIN_256_MAC_MECH_INFO_TYPE: \
(void) Skein_256_ ## _op(&sc->sc_256, __VA_ARGS__);\
break; \
case SKEIN_512_MECH_INFO_TYPE: \
case SKEIN_512_MAC_MECH_INFO_TYPE: \
(void) Skein_512_ ## _op(&sc->sc_512, __VA_ARGS__);\
break; \
case SKEIN1024_MECH_INFO_TYPE: \
case SKEIN1024_MAC_MECH_INFO_TYPE: \
(void) Skein1024_ ## _op(&sc->sc_1024, __VA_ARGS__);\
break; \
@ -143,19 +121,7 @@ skein_get_digest_bitlen(const crypto_mechanism_t *mechanism, size_t *result)
}
*result = param->sp_digest_bitlen;
} else {
switch (mechanism->cm_type) {
case SKEIN_256_MECH_INFO_TYPE:
*result = 256;
break;
case SKEIN_512_MECH_INFO_TYPE:
*result = 512;
break;
case SKEIN1024_MECH_INFO_TYPE:
*result = 1024;
break;
default:
return (CRYPTO_MECHANISM_INVALID);
}
return (CRYPTO_MECHANISM_INVALID);
}
return (CRYPTO_SUCCESS);
}
@ -320,73 +286,6 @@ skein_digest_final_uio(skein_ctx_t *ctx, crypto_data_t *digest)
* KCF software provider digest entry points.
*/
/*
* 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)
{
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)), KM_SLEEP);
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:
memset(SKEIN_CTX(ctx), 0, sizeof (*SKEIN_CTX(ctx)));
kmem_free(SKEIN_CTX(ctx), sizeof (*SKEIN_CTX(ctx)));
SKEIN_CTX_LVALUE(ctx) = NULL;
return (error);
}
/*
* 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)
{
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);
if (error != CRYPTO_SUCCESS) {
memset(SKEIN_CTX(ctx), 0, 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);
return (error);
}
/*
* Performs a skein Update with the input message in `data' (successive calls
* can push more data). This is used both for digest and MAC operation.
@ -470,46 +369,6 @@ skein_final(crypto_ctx_t *ctx, crypto_data_t *digest)
return (error);
}
/*
* Performs a full skein digest computation in a single call, configuring the
* algorithm according to `mechanism', reading the input to be digested from
* `data' and writing the output to `digest'.
* Supported input/output formats are raw, uio and mblk.
*/
static int
skein_digest_atomic(crypto_mechanism_t *mechanism, crypto_data_t *data,
crypto_data_t *digest)
{
int error;
skein_ctx_t skein_ctx;
crypto_ctx_t ctx;
SKEIN_CTX_LVALUE(&ctx) = &skein_ctx;
/* Init */
if (!VALID_SKEIN_DIGEST_MECH(mechanism->cm_type))
return (CRYPTO_MECHANISM_INVALID);
skein_ctx.sc_mech_type = mechanism->cm_type;
error = skein_get_digest_bitlen(mechanism, &skein_ctx.sc_digest_bitlen);
if (error != CRYPTO_SUCCESS)
goto out;
SKEIN_OP(&skein_ctx, Init, skein_ctx.sc_digest_bitlen);
if ((error = skein_update(&ctx, data)) != CRYPTO_SUCCESS)
goto out;
if ((error = skein_final_nofree(&ctx, data)) != CRYPTO_SUCCESS)
goto out;
out:
if (error == CRYPTO_SUCCESS)
digest->cd_length =
CRYPTO_BITS2BYTES(skein_ctx.sc_digest_bitlen);
else
digest->cd_length = 0;
memset(&skein_ctx, 0, sizeof (skein_ctx));
return (error);
}
/*
* Helper function that builds a Skein MAC context from the provided
* mechanism and key.