static void
smb2_hmac_sha256_final(sha2_hc_ctx_t *hc, uint8_t *digest)
{
/* SOFT_MAC_FINAL_2(...) */
SHA2Final(digest, &hc->hc_icontext);
SHA2Update(&hc->hc_ocontext, digest, SHA256_DIGEST_LENGTH);
SHA2Final(digest, &hc->hc_ocontext);
}
/*ARGSUSED*/
void
zio_checksum_SHA512_native(const void *buf, uint64_t size,
const void *ctx_template, zio_cksum_t *zcp)
{
SHA2_CTX ctx;
SHA2Init(SHA512_256, &ctx);
SHA2Update(&ctx, buf, size);
SHA2Final(zcp, &ctx);
}
/*ARGSUSED*/
void
abd_checksum_SHA512_native(abd_t *abd, uint64_t size,
const void *ctx_template, zio_cksum_t *zcp)
{
SHA2_CTX ctx;
SHA2Init(SHA512_256, &ctx);
(void) abd_iterate_func(abd, 0, size, sha_incremental, &ctx);
SHA2Final(zcp, &ctx);
}
/*ARGSUSED*/
void
zio_checksum_SHA256(const void *buf, uint64_t size,
const void *ctx_template, zio_cksum_t *zcp)
{
SHA2_CTX ctx;
zio_cksum_t tmp;
SHA2Init(SHA256, &ctx);
SHA2Update(&ctx, buf, size);
SHA2Final(&tmp, &ctx);
/*
* A prior implementation of this function had a
* private SHA256 implementation always wrote things out in
* Big Endian and there wasn't a byteswap variant of it.
* To preseve on disk compatibility we need to force that
* behaviour.
*/
zcp->zc_word[0] = BE_64(tmp.zc_word[0]);
zcp->zc_word[1] = BE_64(tmp.zc_word[1]);
zcp->zc_word[2] = BE_64(tmp.zc_word[2]);
zcp->zc_word[3] = BE_64(tmp.zc_word[3]);
}
/* ARGSUSED */
static int
sha2_digest_final(crypto_ctx_t *ctx, crypto_data_t *digest,
crypto_req_handle_t req)
{
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;
case CRYPTO_DATA_MBLK:
ret = sha2_digest_final_mblk(&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);
}
/* ARGSUSED */
static int
sha2_digest_atomic(crypto_provider_handle_t provider,
crypto_session_id_t session_id, crypto_mechanism_t *mechanism,
crypto_data_t *data, crypto_data_t *digest,
crypto_req_handle_t req)
{
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;
case CRYPTO_DATA_MBLK:
ret = sha2_digest_update_mblk(&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;
case CRYPTO_DATA_MBLK:
ret = sha2_digest_final_mblk(&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);
}
/*
* Helper SHA2 digest final for mblk's.
* digest_len is the length of the desired digest. If digest_len
* is smaller than the default SHA2 digest length, the caller
* must pass a scratch buffer, digest_scratch, which must
* be at least the algorithm's digest length bytes.
*/
static int
sha2_digest_final_mblk(SHA2_CTX *sha2_ctx, crypto_data_t *digest,
ulong_t digest_len, uchar_t *digest_scratch)
{
off_t offset = digest->cd_offset;
mblk_t *mp;
/*
* Jump to the first mblk_t that will be used to store the digest.
*/
for (mp = digest->cd_mp; mp != NULL && offset >= MBLKL(mp);
offset -= MBLKL(mp), mp = mp->b_cont)
;
if (mp == NULL) {
/*
* The caller specified an offset that is larger than the
* total size of the buffers it provided.
*/
return (CRYPTO_DATA_LEN_RANGE);
}
if (offset + digest_len <= MBLKL(mp)) {
/*
* The computed SHA2 digest will fit in the current mblk.
* Do the SHA2Final() in-place.
*/
if (((sha2_ctx->algotype <= SHA256_HMAC_GEN_MECH_INFO_TYPE) &&
(digest_len != SHA256_DIGEST_LENGTH)) ||
((sha2_ctx->algotype > SHA256_HMAC_GEN_MECH_INFO_TYPE) &&
(digest_len != SHA512_DIGEST_LENGTH))) {
/*
* The caller requested a short digest. Digest
* into a scratch buffer and return to
* the user only what was requested.
*/
SHA2Final(digest_scratch, sha2_ctx);
bcopy(digest_scratch, mp->b_rptr + offset, digest_len);
} else {
SHA2Final(mp->b_rptr + offset, sha2_ctx);
}
} else {
/*
* The computed digest will be crossing one or more mblk's.
* This is bad performance-wise but we need to support it.
* Allocate a small scratch buffer on the stack and
* copy it piece meal to the specified digest iovec's.
*/
uchar_t digest_tmp[SHA512_DIGEST_LENGTH];
off_t scratch_offset = 0;
size_t length = digest_len;
size_t cur_len;
SHA2Final(digest_tmp, sha2_ctx);
while (mp != NULL && length > 0) {
cur_len = MIN(MBLKL(mp) - offset, length);
bcopy(digest_tmp + scratch_offset,
mp->b_rptr + offset, cur_len);
length -= cur_len;
mp = mp->b_cont;
scratch_offset += cur_len;
offset = 0;
}
if (mp == NULL && length > 0) {
/*
* The end of the specified mblk was reached but
* the length requested could not be processed, i.e.
* The caller requested to digest more data than it
* provided.
*/
return (CRYPTO_DATA_LEN_RANGE);
}
}
return (CRYPTO_SUCCESS);
}
/*
* Helper SHA2 digest final function for uio data.
* digest_len is the length of the desired digest. If digest_len
* is smaller than the default SHA2 digest length, the caller
* must pass a scratch buffer, digest_scratch, which must
* be at least the algorithm's digest length bytes.
*/
static int
sha2_digest_final_uio(SHA2_CTX *sha2_ctx, crypto_data_t *digest,
ulong_t digest_len, uchar_t *digest_scratch)
{
off_t offset = digest->cd_offset;
uint_t vec_idx;
/* we support only kernel buffer */
if (digest->cd_uio->uio_segflg != UIO_SYSSPACE)
return (CRYPTO_ARGUMENTS_BAD);
/*
* Jump to the first iovec containing ptr to the digest to
* be returned.
*/
for (vec_idx = 0; offset >= digest->cd_uio->uio_iov[vec_idx].iov_len &&
vec_idx < digest->cd_uio->uio_iovcnt;
offset -= digest->cd_uio->uio_iov[vec_idx++].iov_len)
;
if (vec_idx == digest->cd_uio->uio_iovcnt) {
/*
* The caller specified an offset that is
* larger than the total size of the buffers
* it provided.
*/
return (CRYPTO_DATA_LEN_RANGE);
}
if (offset + digest_len <=
digest->cd_uio->uio_iov[vec_idx].iov_len) {
/*
* The computed SHA2 digest will fit in the current
* iovec.
*/
if (((sha2_ctx->algotype <= SHA256_HMAC_GEN_MECH_INFO_TYPE) &&
(digest_len != SHA256_DIGEST_LENGTH)) ||
((sha2_ctx->algotype > SHA256_HMAC_GEN_MECH_INFO_TYPE) &&
(digest_len != SHA512_DIGEST_LENGTH))) {
/*
* The caller requested a short digest. Digest
* into a scratch buffer and return to
* the user only what was requested.
*/
SHA2Final(digest_scratch, sha2_ctx);
bcopy(digest_scratch, (uchar_t *)digest->
cd_uio->uio_iov[vec_idx].iov_base + offset,
digest_len);
} else {
SHA2Final((uchar_t *)digest->
cd_uio->uio_iov[vec_idx].iov_base + offset,
sha2_ctx);
}
} else {
/*
* The computed digest will be crossing one or more iovec's.
* This is bad performance-wise but we need to support it.
* Allocate a small scratch buffer on the stack and
* copy it piece meal to the specified digest iovec's.
*/
uchar_t digest_tmp[SHA512_DIGEST_LENGTH];
off_t scratch_offset = 0;
size_t length = digest_len;
size_t cur_len;
SHA2Final(digest_tmp, sha2_ctx);
while (vec_idx < digest->cd_uio->uio_iovcnt && length > 0) {
cur_len =
MIN(digest->cd_uio->uio_iov[vec_idx].iov_len -
offset, length);
bcopy(digest_tmp + scratch_offset,
digest->cd_uio->uio_iov[vec_idx].iov_base + offset,
cur_len);
length -= cur_len;
vec_idx++;
scratch_offset += cur_len;
offset = 0;
}
if (vec_idx == digest->cd_uio->uio_iovcnt && length > 0) {
/*
* The end of the specified iovec's was reached but
* the length requested could not be processed, i.e.
* The caller requested to digest more data than it
* provided.
*/
return (CRYPTO_DATA_LEN_RANGE);
}
}
return (CRYPTO_SUCCESS);
}
/* ARGSUSED */
static int
sha2_mac_verify_atomic(crypto_provider_handle_t provider,
crypto_session_id_t session_id, crypto_mechanism_t *mechanism,
crypto_key_t *key, crypto_data_t *data, crypto_data_t *mac,
crypto_spi_ctx_template_t ctx_template, crypto_req_handle_t req)
{
int ret = CRYPTO_SUCCESS;
uchar_t digest[SHA512_DIGEST_LENGTH];
sha2_hmac_ctx_t sha2_hmac_ctx;
uint32_t sha_digest_len, digest_len, sha_hmac_block_size;
uint_t keylen_in_bytes = CRYPTO_BITS2BYTES(key->ck_length);
/*
* Set the digest length and block size to values appropriate to the
* mechanism
*/
switch (mechanism->cm_type) {
case SHA256_HMAC_MECH_INFO_TYPE:
case SHA256_HMAC_GEN_MECH_INFO_TYPE:
sha_digest_len = digest_len = SHA256_DIGEST_LENGTH;
sha_hmac_block_size = SHA256_HMAC_BLOCK_SIZE;
break;
case SHA384_HMAC_MECH_INFO_TYPE:
case SHA384_HMAC_GEN_MECH_INFO_TYPE:
case SHA512_HMAC_MECH_INFO_TYPE:
case SHA512_HMAC_GEN_MECH_INFO_TYPE:
sha_digest_len = digest_len = SHA512_DIGEST_LENGTH;
sha_hmac_block_size = SHA512_HMAC_BLOCK_SIZE;
break;
default:
return (CRYPTO_MECHANISM_INVALID);
}
/* Add support for key by attributes (RFE 4706552) */
if (key->ck_format != CRYPTO_KEY_RAW)
return (CRYPTO_ARGUMENTS_BAD);
if (ctx_template != NULL) {
/* reuse context template */
bcopy(ctx_template, &sha2_hmac_ctx, sizeof (sha2_hmac_ctx_t));
} else {
sha2_hmac_ctx.hc_mech_type = mechanism->cm_type;
/* no context template, initialize context */
if (keylen_in_bytes > sha_hmac_block_size) {
/*
* Hash the passed-in key to get a smaller key.
* The inner context is used since it hasn't been
* initialized yet.
*/
PROV_SHA2_DIGEST_KEY(mechanism->cm_type / 3,
&sha2_hmac_ctx.hc_icontext,
key->ck_data, keylen_in_bytes, digest);
sha2_mac_init_ctx(&sha2_hmac_ctx, digest,
sha_digest_len);
} else {
sha2_mac_init_ctx(&sha2_hmac_ctx, key->ck_data,
keylen_in_bytes);
}
}
/* get the mechanism parameters, if applicable */
if (mechanism->cm_type % 3 == 2) {
if (mechanism->cm_param == NULL ||
mechanism->cm_param_len != sizeof (ulong_t)) {
ret = CRYPTO_MECHANISM_PARAM_INVALID;
goto bail;
}
PROV_SHA2_GET_DIGEST_LEN(mechanism, digest_len);
if (digest_len > sha_digest_len) {
ret = CRYPTO_MECHANISM_PARAM_INVALID;
goto bail;
}
}
if (mac->cd_length != digest_len) {
ret = CRYPTO_INVALID_MAC;
goto bail;
}
/* do a SHA2 update of the inner context using the specified data */
SHA2_MAC_UPDATE(data, sha2_hmac_ctx, ret);
if (ret != CRYPTO_SUCCESS)
/* the update failed, free context and bail */
goto bail;
/* do a SHA2 final on the inner context */
SHA2Final(digest, &sha2_hmac_ctx.hc_icontext);
/*
* Do an SHA2 update on the outer context, feeding the inner
* digest as data.
*
* HMAC-SHA384 needs special handling as the outer hash needs only 48
* bytes of the inner hash value.
*/
if (mechanism->cm_type == SHA384_HMAC_MECH_INFO_TYPE ||
mechanism->cm_type == SHA384_HMAC_GEN_MECH_INFO_TYPE)
SHA2Update(&sha2_hmac_ctx.hc_ocontext, digest,
SHA384_DIGEST_LENGTH);
else
SHA2Update(&sha2_hmac_ctx.hc_ocontext, digest, sha_digest_len);
/*
* Do a SHA2 final on the outer context, storing the computed
* digest in the users buffer.
*/
SHA2Final(digest, &sha2_hmac_ctx.hc_ocontext);
/*
* Compare the computed digest against the expected digest passed
* as argument.
*/
switch (mac->cd_format) {
case CRYPTO_DATA_RAW:
if (bcmp(digest, (unsigned char *)mac->cd_raw.iov_base +
mac->cd_offset, digest_len) != 0)
ret = CRYPTO_INVALID_MAC;
break;
case CRYPTO_DATA_UIO: {
off_t offset = mac->cd_offset;
uint_t vec_idx;
off_t scratch_offset = 0;
size_t length = digest_len;
size_t cur_len;
/* we support only kernel buffer */
if (mac->cd_uio->uio_segflg != UIO_SYSSPACE)
return (CRYPTO_ARGUMENTS_BAD);
/* jump to the first iovec containing the expected digest */
for (vec_idx = 0;
offset >= mac->cd_uio->uio_iov[vec_idx].iov_len &&
vec_idx < mac->cd_uio->uio_iovcnt;
offset -= mac->cd_uio->uio_iov[vec_idx++].iov_len)
;
if (vec_idx == mac->cd_uio->uio_iovcnt) {
/*
* The caller specified an offset that is
* larger than the total size of the buffers
* it provided.
*/
ret = CRYPTO_DATA_LEN_RANGE;
break;
}
/* do the comparison of computed digest vs specified one */
while (vec_idx < mac->cd_uio->uio_iovcnt && length > 0) {
cur_len = MIN(mac->cd_uio->uio_iov[vec_idx].iov_len -
offset, length);
if (bcmp(digest + scratch_offset,
mac->cd_uio->uio_iov[vec_idx].iov_base + offset,
cur_len) != 0) {
ret = CRYPTO_INVALID_MAC;
break;
}
length -= cur_len;
vec_idx++;
scratch_offset += cur_len;
offset = 0;
}
break;
}
case CRYPTO_DATA_MBLK: {
off_t offset = mac->cd_offset;
mblk_t *mp;
off_t scratch_offset = 0;
size_t length = digest_len;
size_t cur_len;
/* jump to the first mblk_t containing the expected digest */
for (mp = mac->cd_mp; mp != NULL && offset >= MBLKL(mp);
offset -= MBLKL(mp), mp = mp->b_cont)
;
if (mp == NULL) {
/*
* The caller specified an offset that is larger than
* the total size of the buffers it provided.
*/
ret = CRYPTO_DATA_LEN_RANGE;
break;
}
while (mp != NULL && length > 0) {
cur_len = MIN(MBLKL(mp) - offset, length);
if (bcmp(digest + scratch_offset,
mp->b_rptr + offset, cur_len) != 0) {
ret = CRYPTO_INVALID_MAC;
break;
}
length -= cur_len;
mp = mp->b_cont;
scratch_offset += cur_len;
offset = 0;
}
break;
}
default:
ret = CRYPTO_ARGUMENTS_BAD;
}
return (ret);
bail:
bzero(&sha2_hmac_ctx, sizeof (sha2_hmac_ctx_t));
mac->cd_length = 0;
return (ret);
}
/* ARGSUSED */
static int
sha2_mac_atomic(crypto_provider_handle_t provider,
crypto_session_id_t session_id, crypto_mechanism_t *mechanism,
crypto_key_t *key, crypto_data_t *data, crypto_data_t *mac,
crypto_spi_ctx_template_t ctx_template, crypto_req_handle_t req)
{
int ret = CRYPTO_SUCCESS;
uchar_t digest[SHA512_DIGEST_LENGTH];
sha2_hmac_ctx_t sha2_hmac_ctx;
uint32_t sha_digest_len, digest_len, sha_hmac_block_size;
uint_t keylen_in_bytes = CRYPTO_BITS2BYTES(key->ck_length);
/*
* Set the digest length and block size to values appropriate to the
* mechanism
*/
switch (mechanism->cm_type) {
case SHA256_HMAC_MECH_INFO_TYPE:
case SHA256_HMAC_GEN_MECH_INFO_TYPE:
sha_digest_len = digest_len = SHA256_DIGEST_LENGTH;
sha_hmac_block_size = SHA256_HMAC_BLOCK_SIZE;
break;
case SHA384_HMAC_MECH_INFO_TYPE:
case SHA384_HMAC_GEN_MECH_INFO_TYPE:
case SHA512_HMAC_MECH_INFO_TYPE:
case SHA512_HMAC_GEN_MECH_INFO_TYPE:
sha_digest_len = digest_len = SHA512_DIGEST_LENGTH;
sha_hmac_block_size = SHA512_HMAC_BLOCK_SIZE;
break;
default:
return (CRYPTO_MECHANISM_INVALID);
}
/* Add support for key by attributes (RFE 4706552) */
if (key->ck_format != CRYPTO_KEY_RAW)
return (CRYPTO_ARGUMENTS_BAD);
if (ctx_template != NULL) {
/* reuse context template */
bcopy(ctx_template, &sha2_hmac_ctx, sizeof (sha2_hmac_ctx_t));
} else {
sha2_hmac_ctx.hc_mech_type = mechanism->cm_type;
/* no context template, initialize context */
if (keylen_in_bytes > sha_hmac_block_size) {
/*
* Hash the passed-in key to get a smaller key.
* The inner context is used since it hasn't been
* initialized yet.
*/
PROV_SHA2_DIGEST_KEY(mechanism->cm_type / 3,
&sha2_hmac_ctx.hc_icontext,
key->ck_data, keylen_in_bytes, digest);
sha2_mac_init_ctx(&sha2_hmac_ctx, digest,
sha_digest_len);
} else {
sha2_mac_init_ctx(&sha2_hmac_ctx, key->ck_data,
keylen_in_bytes);
}
}
/* get the mechanism parameters, if applicable */
if ((mechanism->cm_type % 3) == 2) {
if (mechanism->cm_param == NULL ||
mechanism->cm_param_len != sizeof (ulong_t)) {
ret = CRYPTO_MECHANISM_PARAM_INVALID;
goto bail;
}
PROV_SHA2_GET_DIGEST_LEN(mechanism, digest_len);
if (digest_len > sha_digest_len) {
ret = CRYPTO_MECHANISM_PARAM_INVALID;
goto bail;
}
}
/* do a SHA2 update of the inner context using the specified data */
SHA2_MAC_UPDATE(data, sha2_hmac_ctx, ret);
if (ret != CRYPTO_SUCCESS)
/* the update failed, free context and bail */
goto bail;
/*
* Do a SHA2 final on the inner context.
*/
SHA2Final(digest, &sha2_hmac_ctx.hc_icontext);
/*
* Do an SHA2 update on the outer context, feeding the inner
* digest as data.
*
* HMAC-SHA384 needs special handling as the outer hash needs only 48
* bytes of the inner hash value.
*/
if (mechanism->cm_type == SHA384_HMAC_MECH_INFO_TYPE ||
mechanism->cm_type == SHA384_HMAC_GEN_MECH_INFO_TYPE)
SHA2Update(&sha2_hmac_ctx.hc_ocontext, digest,
SHA384_DIGEST_LENGTH);
else
SHA2Update(&sha2_hmac_ctx.hc_ocontext, digest, sha_digest_len);
/*
* Do a SHA2 final on the outer context, storing the computed
* digest in the users buffer.
*/
switch (mac->cd_format) {
case CRYPTO_DATA_RAW:
if (digest_len != sha_digest_len) {
/*
* The caller requested a short digest. Digest
* into a scratch buffer and return to
* the user only what was requested.
*/
SHA2Final(digest, &sha2_hmac_ctx.hc_ocontext);
bcopy(digest, (unsigned char *)mac->cd_raw.iov_base +
mac->cd_offset, digest_len);
} else {
SHA2Final((unsigned char *)mac->cd_raw.iov_base +
mac->cd_offset, &sha2_hmac_ctx.hc_ocontext);
}
break;
case CRYPTO_DATA_UIO:
ret = sha2_digest_final_uio(&sha2_hmac_ctx.hc_ocontext, mac,
digest_len, digest);
break;
case CRYPTO_DATA_MBLK:
ret = sha2_digest_final_mblk(&sha2_hmac_ctx.hc_ocontext, mac,
digest_len, digest);
break;
default:
ret = CRYPTO_ARGUMENTS_BAD;
}
if (ret == CRYPTO_SUCCESS) {
mac->cd_length = digest_len;
return (CRYPTO_SUCCESS);
}
bail:
bzero(&sha2_hmac_ctx, sizeof (sha2_hmac_ctx_t));
mac->cd_length = 0;
return (ret);
}
/* ARGSUSED */
static int
sha2_mac_final(crypto_ctx_t *ctx, crypto_data_t *mac, crypto_req_handle_t req)
{
int ret = CRYPTO_SUCCESS;
uchar_t digest[SHA512_DIGEST_LENGTH];
uint32_t digest_len, sha_digest_len;
ASSERT(ctx->cc_provider_private != NULL);
/* Set the digest lengths to values appropriate to the mechanism */
switch (PROV_SHA2_HMAC_CTX(ctx)->hc_mech_type) {
case SHA256_HMAC_MECH_INFO_TYPE:
sha_digest_len = digest_len = SHA256_DIGEST_LENGTH;
break;
case SHA384_HMAC_MECH_INFO_TYPE:
sha_digest_len = digest_len = SHA384_DIGEST_LENGTH;
break;
case SHA512_HMAC_MECH_INFO_TYPE:
sha_digest_len = digest_len = SHA512_DIGEST_LENGTH;
break;
case SHA256_HMAC_GEN_MECH_INFO_TYPE:
sha_digest_len = SHA256_DIGEST_LENGTH;
digest_len = PROV_SHA2_HMAC_CTX(ctx)->hc_digest_len;
break;
case SHA384_HMAC_GEN_MECH_INFO_TYPE:
case SHA512_HMAC_GEN_MECH_INFO_TYPE:
sha_digest_len = SHA512_DIGEST_LENGTH;
digest_len = PROV_SHA2_HMAC_CTX(ctx)->hc_digest_len;
break;
}
/*
* We need to just return the length needed to store the output.
* We should not destroy the context for the following cases.
*/
if ((mac->cd_length == 0) || (mac->cd_length < digest_len)) {
mac->cd_length = digest_len;
return (CRYPTO_BUFFER_TOO_SMALL);
}
/*
* Do a SHA2 final on the inner context.
*/
SHA2Final(digest, &PROV_SHA2_HMAC_CTX(ctx)->hc_icontext);
/*
* Do a SHA2 update on the outer context, feeding the inner
* digest as data.
*/
SHA2Update(&PROV_SHA2_HMAC_CTX(ctx)->hc_ocontext, digest,
sha_digest_len);
/*
* Do a SHA2 final on the outer context, storing the computing
* digest in the users buffer.
*/
switch (mac->cd_format) {
case CRYPTO_DATA_RAW:
if (digest_len != sha_digest_len) {
/*
* The caller requested a short digest. Digest
* into a scratch buffer and return to
* the user only what was requested.
*/
SHA2Final(digest,
&PROV_SHA2_HMAC_CTX(ctx)->hc_ocontext);
bcopy(digest, (unsigned char *)mac->cd_raw.iov_base +
mac->cd_offset, digest_len);
} else {
SHA2Final((unsigned char *)mac->cd_raw.iov_base +
mac->cd_offset,
&PROV_SHA2_HMAC_CTX(ctx)->hc_ocontext);
}
break;
case CRYPTO_DATA_UIO:
ret = sha2_digest_final_uio(
&PROV_SHA2_HMAC_CTX(ctx)->hc_ocontext, mac,
digest_len, digest);
break;
case CRYPTO_DATA_MBLK:
ret = sha2_digest_final_mblk(
&PROV_SHA2_HMAC_CTX(ctx)->hc_ocontext, mac,
digest_len, digest);
break;
default:
ret = CRYPTO_ARGUMENTS_BAD;
}
if (ret == CRYPTO_SUCCESS)
mac->cd_length = digest_len;
else
mac->cd_length = 0;
bzero(ctx->cc_provider_private, sizeof (sha2_hmac_ctx_t));
kmem_free(ctx->cc_provider_private, sizeof (sha2_hmac_ctx_t));
ctx->cc_provider_private = NULL;
return (ret);
}
