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ecc.c
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ecc.c
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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2010 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Copyright 2010 Nexenta Systems, Inc. All rights reserved.
*/
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/param.h>
#include <sys/modctl.h>
#include <sys/ddi.h>
#include <sys/crypto/spi.h>
#include <sys/crypto/impl.h>
#include <sys/crypto/ioctladmin.h>
#include <sys/sysmacros.h>
#include <sys/strsun.h>
#include <sys/sha1.h>
#include <sys/random.h>
#include <sys/conf.h>
#include <sys/devops.h>
#include <sys/sunddi.h>
#include <sys/varargs.h>
#include <sys/kmem.h>
#include <sys/kstat.h>
#include <des/des_impl.h>
#include <ecc/ecc_impl.h>
#define CKD_NULL 0x00000001
extern struct mod_ops mod_cryptoops;
/*
* Module linkage information for the kernel.
*/
static struct modlcrypto modlcrypto = {
&mod_cryptoops,
"EC Kernel SW Provider"
};
static struct modlinkage modlinkage = {
MODREV_1,
(void *)&modlcrypto,
NULL
};
/*
* CSPI information (entry points, provider info, etc.)
*/
typedef enum ecc_mech_type {
EC_KEY_PAIR_GEN_MECH_INFO_TYPE, /* SUN_CKM_EC_KEY_PAIR_GEN */
ECDSA_MECH_INFO_TYPE, /* SUN_CKM_ECDSA */
ECDSA_SHA1_MECH_INFO_TYPE, /* SUN_CKM_ECDSA_SHA1 */
ECDH1_DERIVE_MECH_INFO_TYPE /* SUN_CKM_ECDH1_DERIVE */
} ecc_mech_type_t;
/*
* Context for ECDSA mechanism.
*/
typedef struct ecc_ctx {
ecc_mech_type_t mech_type;
crypto_key_t *key;
size_t keychunk_size;
ECParams ecparams;
} ecc_ctx_t;
/*
* Context for ECDSA_SHA1 mechanism.
*/
typedef struct digest_ecc_ctx {
ecc_mech_type_t mech_type;
crypto_key_t *key;
size_t keychunk_size;
ECParams ecparams;
union {
SHA1_CTX sha1ctx;
} dctx_u;
} digest_ecc_ctx_t;
#define sha1_ctx dctx_u.sha1ctx
/*
* Mechanism info structure passed to KCF during registration.
*/
static crypto_mech_info_t ecc_mech_info_tab[] = {
/* EC_KEY_PAIR_GEN */
{SUN_CKM_EC_KEY_PAIR_GEN, EC_KEY_PAIR_GEN_MECH_INFO_TYPE,
CRYPTO_FG_GENERATE_KEY_PAIR, EC_MIN_KEY_LEN, EC_MAX_KEY_LEN,
CRYPTO_KEYSIZE_UNIT_IN_BITS},
/* ECDH */
{SUN_CKM_ECDH1_DERIVE, ECDH1_DERIVE_MECH_INFO_TYPE, CRYPTO_FG_DERIVE,
EC_MIN_KEY_LEN, EC_MAX_KEY_LEN, CRYPTO_KEYSIZE_UNIT_IN_BITS},
/* ECDSA */
{SUN_CKM_ECDSA, ECDSA_MECH_INFO_TYPE,
CRYPTO_FG_SIGN | CRYPTO_FG_VERIFY |
CRYPTO_FG_SIGN_ATOMIC | CRYPTO_FG_VERIFY_ATOMIC,
EC_MIN_KEY_LEN, EC_MAX_KEY_LEN, CRYPTO_KEYSIZE_UNIT_IN_BITS},
/* ECDSA_SHA1 */
{SUN_CKM_ECDSA_SHA1, ECDSA_SHA1_MECH_INFO_TYPE,
CRYPTO_FG_SIGN | CRYPTO_FG_VERIFY |
CRYPTO_FG_SIGN_ATOMIC | CRYPTO_FG_VERIFY_ATOMIC,
EC_MIN_KEY_LEN, EC_MAX_KEY_LEN, CRYPTO_KEYSIZE_UNIT_IN_BITS}
};
static void ecc_provider_status(crypto_provider_handle_t, uint_t *);
static crypto_control_ops_t ecc_control_ops = {
ecc_provider_status
};
static int ecc_sign_init(crypto_ctx_t *, crypto_mechanism_t *,
crypto_key_t *, crypto_spi_ctx_template_t, crypto_req_handle_t);
static int ecc_sign(crypto_ctx_t *, crypto_data_t *, crypto_data_t *,
crypto_req_handle_t);
static int ecc_sign_update(crypto_ctx_t *, crypto_data_t *,
crypto_req_handle_t);
static int ecc_sign_final(crypto_ctx_t *, crypto_data_t *,
crypto_req_handle_t);
static int ecc_sign_atomic(crypto_provider_handle_t, crypto_session_id_t,
crypto_mechanism_t *, crypto_key_t *, crypto_data_t *, crypto_data_t *,
crypto_spi_ctx_template_t, crypto_req_handle_t);
static crypto_sign_ops_t ecc_sign_ops = {
ecc_sign_init,
ecc_sign,
ecc_sign_update,
ecc_sign_final,
ecc_sign_atomic,
NULL,
NULL,
NULL
};
static int ecc_verify_init(crypto_ctx_t *, crypto_mechanism_t *,
crypto_key_t *, crypto_spi_ctx_template_t, crypto_req_handle_t);
static int ecc_verify(crypto_ctx_t *, crypto_data_t *, crypto_data_t *,
crypto_req_handle_t);
static int ecc_verify_update(crypto_ctx_t *, crypto_data_t *,
crypto_req_handle_t);
static int ecc_verify_final(crypto_ctx_t *, crypto_data_t *,
crypto_req_handle_t);
static int ecc_verify_atomic(crypto_provider_handle_t, crypto_session_id_t,
crypto_mechanism_t *, crypto_key_t *, crypto_data_t *,
crypto_data_t *, crypto_spi_ctx_template_t, crypto_req_handle_t);
static crypto_verify_ops_t ecc_verify_ops = {
ecc_verify_init,
ecc_verify,
ecc_verify_update,
ecc_verify_final,
ecc_verify_atomic,
NULL,
NULL,
NULL
};
static int ecc_nostore_key_generate_pair(crypto_provider_handle_t,
crypto_session_id_t, crypto_mechanism_t *, crypto_object_attribute_t *,
uint_t, crypto_object_attribute_t *, uint_t, crypto_object_attribute_t *,
uint_t, crypto_object_attribute_t *, uint_t, crypto_req_handle_t);
static int ecc_nostore_key_derive(crypto_provider_handle_t,
crypto_session_id_t, crypto_mechanism_t *, crypto_key_t *,
crypto_object_attribute_t *, uint_t, crypto_object_attribute_t *,
uint_t, crypto_req_handle_t);
static crypto_nostore_key_ops_t ecc_nostore_key_ops = {
NULL,
ecc_nostore_key_generate_pair,
ecc_nostore_key_derive
};
static crypto_ops_t ecc_crypto_ops = {
&ecc_control_ops,
NULL,
NULL,
NULL,
&ecc_sign_ops,
&ecc_verify_ops,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
&ecc_nostore_key_ops,
NULL,
};
static crypto_provider_info_t ecc_prov_info = {
CRYPTO_SPI_VERSION_4,
"EC Software Provider",
CRYPTO_SW_PROVIDER,
{&modlinkage},
NULL,
&ecc_crypto_ops,
sizeof (ecc_mech_info_tab)/sizeof (crypto_mech_info_t),
ecc_mech_info_tab
};
static crypto_kcf_provider_handle_t ecc_prov_handle = 0;
static int ecc_sign_common(ecc_ctx_t *, crypto_data_t *, crypto_data_t *,
crypto_req_handle_t);
static int ecc_verify_common(ecc_ctx_t *, crypto_data_t *, crypto_data_t *,
crypto_req_handle_t);
static int find_attr(crypto_object_attribute_t *, uint_t, uint64_t);
static int get_template_attr_ulong(crypto_object_attribute_t *,
uint_t, uint64_t, ulong_t *);
static void ecc_free_context(crypto_ctx_t *);
static void free_ecparams(ECParams *, boolean_t);
static void free_ecprivkey(ECPrivateKey *);
int
_init(void)
{
int ret;
if ((ret = mod_install(&modlinkage)) != 0)
return (ret);
/* Register with KCF. If the registration fails, remove the module. */
if (crypto_register_provider(&ecc_prov_info, &ecc_prov_handle)) {
(void) mod_remove(&modlinkage);
return (EACCES);
}
return (0);
}
int
_fini(void)
{
/* Unregister from KCF if module is registered */
if (ecc_prov_handle != 0) {
if (crypto_unregister_provider(ecc_prov_handle))
return (EBUSY);
ecc_prov_handle = 0;
}
return (mod_remove(&modlinkage));
}
int
_info(struct modinfo *modinfop)
{
return (mod_info(&modlinkage, modinfop));
}
/* ARGSUSED */
static void
ecc_provider_status(crypto_provider_handle_t provider, uint_t *status)
{
*status = CRYPTO_PROVIDER_READY;
}
/*
* Return the index of an attribute of specified type found in
* the specified array of attributes. If the attribute cannot
* found, return -1.
*/
static int
find_attr(crypto_object_attribute_t *attr, uint_t nattr, uint64_t attr_type)
{
int i;
for (i = 0; i < nattr; i++)
if (attr[i].oa_value != NULL && attr[i].oa_type == attr_type)
return (i);
return (-1);
}
/*
* Common function used by the get_template_attr_*() family of
* functions. Returns the value of the specified attribute of specified
* length. Returns CRYPTO_SUCCESS on success, CRYPTO_ATTRIBUTE_VALUE_INVALID
* if the length of the attribute does not match the specified length,
* or CRYPTO_ARGUMENTS_BAD if the attribute cannot be found.
*/
static int
get_template_attr_scalar_common(crypto_object_attribute_t *template,
uint_t nattr, uint64_t attr_type, void *value, size_t value_len)
{
size_t oa_value_len;
size_t offset = 0;
int attr_idx;
if ((attr_idx = find_attr(template, nattr, attr_type)) == -1)
return (CRYPTO_ARGUMENTS_BAD);
oa_value_len = template[attr_idx].oa_value_len;
if (oa_value_len != value_len) {
return (CRYPTO_ATTRIBUTE_VALUE_INVALID);
}
do_copy:
bcopy(template[attr_idx].oa_value, (uchar_t *)value + offset,
oa_value_len);
return (CRYPTO_SUCCESS);
}
/*
* Get the value of a ulong_t attribute from the specified template.
*/
static int
get_template_attr_ulong(crypto_object_attribute_t *template,
uint_t nattr, uint64_t attr_type, ulong_t *attr_value)
{
return (get_template_attr_scalar_common(template, nattr,
attr_type, attr_value, sizeof (ulong_t)));
}
/*
* Called from init routines to do basic sanity checks. Init routines,
* e.g. sign_init should fail rather than subsequent operations.
*/
static int
check_mech_and_key(ecc_mech_type_t mech_type, crypto_key_t *key, ulong_t class)
{
int rv = CRYPTO_SUCCESS;
uchar_t *foo;
ssize_t point_len;
ssize_t value_len;
if (mech_type != ECDSA_SHA1_MECH_INFO_TYPE &&
mech_type != ECDSA_MECH_INFO_TYPE)
return (CRYPTO_MECHANISM_INVALID);
if (key->ck_format != CRYPTO_KEY_ATTR_LIST) {
return (CRYPTO_KEY_TYPE_INCONSISTENT);
}
switch (class) {
case CKO_PUBLIC_KEY:
if ((rv = crypto_get_key_attr(key, CKA_EC_POINT, &foo,
&point_len)) != CRYPTO_SUCCESS) {
return (CRYPTO_TEMPLATE_INCOMPLETE);
}
if (point_len < CRYPTO_BITS2BYTES(EC_MIN_KEY_LEN) * 2 + 1 ||
point_len > CRYPTO_BITS2BYTES(EC_MAX_KEY_LEN) * 2 + 1)
return (CRYPTO_KEY_SIZE_RANGE);
break;
case CKO_PRIVATE_KEY:
if ((rv = crypto_get_key_attr(key, CKA_VALUE, &foo,
&value_len)) != CRYPTO_SUCCESS) {
return (CRYPTO_TEMPLATE_INCOMPLETE);
}
if (value_len < CRYPTO_BITS2BYTES(EC_MIN_KEY_LEN) ||
value_len > CRYPTO_BITS2BYTES(EC_MAX_KEY_LEN))
return (CRYPTO_KEY_SIZE_RANGE);
break;
default:
return (CRYPTO_TEMPLATE_INCONSISTENT);
}
return (rv);
}
/*
* This function guarantees to return non-zero random numbers.
* This is needed as the /dev/urandom kernel interface,
* random_get_pseudo_bytes(), may return zeros.
*/
int
ecc_knzero_random_generator(uint8_t *ran_out, size_t ran_len)
{
int rv;
size_t ebc = 0; /* count of extra bytes in extrarand */
size_t i = 0;
uint8_t extrarand[32];
size_t extrarand_len;
if ((rv = random_get_pseudo_bytes(ran_out, ran_len)) != 0)
return (rv);
/*
* Walk through the returned random numbers pointed by ran_out,
* and look for any random number which is zero.
* If we find zero, call random_get_pseudo_bytes() to generate
* another 32 random numbers pool. Replace any zeros in ran_out[]
* from the random number in pool.
*/
while (i < ran_len) {
if (ran_out[i] != 0) {
i++;
continue;
}
/*
* Note that it is 'while' so we are guaranteed a
* non-zero value on exit.
*/
if (ebc == 0) {
/* refresh extrarand */
extrarand_len = sizeof (extrarand);
if ((rv = random_get_pseudo_bytes(extrarand,
extrarand_len)) != 0) {
return (rv);
}
ebc = extrarand_len;
}
/* Replace zero with byte from extrarand. */
-- ebc;
/*
* The new random byte zero/non-zero will be checked in
* the next pass through the loop.
*/
ran_out[i] = extrarand[ebc];
}
return (CRYPTO_SUCCESS);
}
static void
ecc_free_context(crypto_ctx_t *ctx)
{
ecc_ctx_t *ctxp = ctx->cc_provider_private;
if (ctxp != NULL) {
bzero(ctxp->key, ctxp->keychunk_size);
kmem_free(ctxp->key, ctxp->keychunk_size);
free_ecparams(&ctxp->ecparams, B_FALSE);
if (ctxp->mech_type == ECDSA_MECH_INFO_TYPE)
kmem_free(ctxp, sizeof (ecc_ctx_t));
else
kmem_free(ctxp, sizeof (digest_ecc_ctx_t));
ctx->cc_provider_private = NULL;
}
}
/* ARGSUSED */
static int
ecc_sign_verify_common_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 rv;
int kmflag;
ecc_ctx_t *ctxp;
digest_ecc_ctx_t *dctxp;
ecc_mech_type_t mech_type = mechanism->cm_type;
uchar_t *params;
ssize_t params_len;
ECParams *ecparams;
SECKEYECParams params_item;
if (crypto_get_key_attr(key, CKA_EC_PARAMS, (void *) ¶ms,
¶ms_len)) {
return (CRYPTO_ARGUMENTS_BAD);
}
/* ASN1 check */
if (params[0] != 0x06 ||
params[1] != params_len - 2) {
return (CRYPTO_ATTRIBUTE_VALUE_INVALID);
}
params_item.data = params;
params_item.len = (uint_t)params_len;
kmflag = crypto_kmflag(req);
if (EC_DecodeParams(¶ms_item, &ecparams, kmflag) != SECSuccess) {
/* bad curve OID */
return (CRYPTO_ARGUMENTS_BAD);
}
/*
* Allocate an ECC context.
*/
switch (mech_type) {
case ECDSA_SHA1_MECH_INFO_TYPE:
dctxp = kmem_zalloc(sizeof (digest_ecc_ctx_t), kmflag);
ctxp = (ecc_ctx_t *)dctxp;
break;
default:
ctxp = kmem_zalloc(sizeof (ecc_ctx_t), kmflag);
break;
}
if (ctxp == NULL) {
free_ecparams(ecparams, B_TRUE);
return (CRYPTO_HOST_MEMORY);
}
if ((rv = crypto_copy_key_to_ctx(key, &ctxp->key, &ctxp->keychunk_size,
kmflag)) != CRYPTO_SUCCESS) {
switch (mech_type) {
case ECDSA_SHA1_MECH_INFO_TYPE:
kmem_free(dctxp, sizeof (digest_ecc_ctx_t));
break;
default:
kmem_free(ctxp, sizeof (ecc_ctx_t));
break;
}
free_ecparams(ecparams, B_TRUE);
return (rv);
}
ctxp->mech_type = mech_type;
ctxp->ecparams = *ecparams;
kmem_free(ecparams, sizeof (ECParams));
switch (mech_type) {
case ECDSA_SHA1_MECH_INFO_TYPE:
SHA1Init(&(dctxp->sha1_ctx));
break;
}
ctx->cc_provider_private = ctxp;
return (CRYPTO_SUCCESS);
}
/* ARGSUSED */
static int
ecc_sign_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 rv;
ecc_mech_type_t mech_type = mechanism->cm_type;
if ((rv = check_mech_and_key(mech_type, key,
CKO_PRIVATE_KEY)) != CRYPTO_SUCCESS)
return (rv);
rv = ecc_sign_verify_common_init(ctx, mechanism, key,
ctx_template, req);
return (rv);
}
/* ARGSUSED */
static int
ecc_verify_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 rv;
ecc_mech_type_t mech_type = mechanism->cm_type;
if ((rv = check_mech_and_key(mech_type, key,
CKO_PUBLIC_KEY)) != CRYPTO_SUCCESS)
return (rv);
rv = ecc_sign_verify_common_init(ctx, mechanism, key,
ctx_template, req);
return (rv);
}
#define SHA1_DIGEST_SIZE 20
#define INIT_RAW_CRYPTO_DATA(data, base, len, cd_len) \
(data).cd_format = CRYPTO_DATA_RAW; \
(data).cd_offset = 0; \
(data).cd_raw.iov_base = (char *)base; \
(data).cd_raw.iov_len = len; \
(data).cd_length = cd_len;
static int
ecc_digest_svrfy_common(digest_ecc_ctx_t *ctxp, crypto_data_t *data,
crypto_data_t *signature, uchar_t flag, crypto_req_handle_t req)
{
int rv = CRYPTO_FAILED;
uchar_t digest[SHA1_DIGEST_LENGTH];
crypto_data_t der_cd;
ecc_mech_type_t mech_type;
ASSERT(flag & CRYPTO_DO_SIGN || flag & CRYPTO_DO_VERIFY);
ASSERT(data != NULL || (flag & CRYPTO_DO_FINAL));
mech_type = ctxp->mech_type;
if (mech_type != ECDSA_SHA1_MECH_INFO_TYPE)
return (CRYPTO_MECHANISM_INVALID);
/* Don't digest if only returning length of signature. */
if (signature->cd_length > 0) {
if (mech_type == ECDSA_SHA1_MECH_INFO_TYPE) {
rv = crypto_digest_data(data, &(ctxp->sha1_ctx),
digest, (void (*)())SHA1Update,
(void (*)())SHA1Final, flag | CRYPTO_DO_SHA1);
if (rv != CRYPTO_SUCCESS)
return (rv);
}
}
INIT_RAW_CRYPTO_DATA(der_cd, digest, SHA1_DIGEST_SIZE,
SHA1_DIGEST_SIZE);
if (flag & CRYPTO_DO_SIGN) {
rv = ecc_sign_common((ecc_ctx_t *)ctxp, &der_cd, signature,
req);
} else
rv = ecc_verify_common((ecc_ctx_t *)ctxp, &der_cd, signature,
req);
return (rv);
}
/*
* This is a single-part signing routine. It does not
* compute a hash before signing.
*/
static int
ecc_sign_common(ecc_ctx_t *ctx, crypto_data_t *data, crypto_data_t *signature,
crypto_req_handle_t req)
{
int rv = CRYPTO_FAILED;
SECStatus ss;
uchar_t *param;
uchar_t *private;
ssize_t param_len;
ssize_t private_len;
uchar_t tmp_data[EC_MAX_DIGEST_LEN];
uchar_t signed_data[EC_MAX_SIG_LEN];
ECPrivateKey ECkey;
SECItem signature_item;
SECItem digest_item;
crypto_key_t *key = ctx->key;
int kmflag;
if ((rv = crypto_get_key_attr(key, CKA_EC_PARAMS, ¶m,
¶m_len)) != CRYPTO_SUCCESS) {
return (rv);
}
if (data->cd_length > sizeof (tmp_data))
return (CRYPTO_DATA_LEN_RANGE);
if ((rv = crypto_get_input_data(data, &digest_item.data, tmp_data))
!= CRYPTO_SUCCESS) {
return (rv);
}
digest_item.len = data->cd_length;
/* structure assignment */
ECkey.ecParams = ctx->ecparams;
if ((rv = crypto_get_key_attr(key, CKA_VALUE, &private,
&private_len)) != CRYPTO_SUCCESS) {
return (rv);
}
ECkey.privateValue.data = private;
ECkey.privateValue.len = (uint_t)private_len;
signature_item.data = signed_data;
signature_item.len = sizeof (signed_data);
kmflag = crypto_kmflag(req);
if ((ss = ECDSA_SignDigest(&ECkey, &signature_item, &digest_item,
kmflag)) != SECSuccess) {
if (ss == SECBufferTooSmall)
return (CRYPTO_BUFFER_TOO_SMALL);
return (CRYPTO_FAILED);
}
if (rv == CRYPTO_SUCCESS) {
/* copy out the signature */
if ((rv = crypto_put_output_data(signed_data,
signature, signature_item.len)) != CRYPTO_SUCCESS)
return (rv);
signature->cd_length = signature_item.len;
}
return (rv);
}
/* ARGSUSED */
static int
ecc_sign(crypto_ctx_t *ctx, crypto_data_t *data, crypto_data_t *signature,
crypto_req_handle_t req)
{
int rv;
ecc_ctx_t *ctxp;
ASSERT(ctx->cc_provider_private != NULL);
ctxp = ctx->cc_provider_private;
switch (ctxp->mech_type) {
case ECDSA_SHA1_MECH_INFO_TYPE:
rv = ecc_digest_svrfy_common((digest_ecc_ctx_t *)ctxp, data,
signature, CRYPTO_DO_SIGN | CRYPTO_DO_UPDATE |
CRYPTO_DO_FINAL, req);
break;
default:
rv = ecc_sign_common(ctxp, data, signature, req);
break;
}
if (rv != CRYPTO_BUFFER_TOO_SMALL)
ecc_free_context(ctx);
return (rv);
}
/* ARGSUSED */
static int
ecc_sign_update(crypto_ctx_t *ctx, crypto_data_t *data, crypto_req_handle_t req)
{
int rv;
digest_ecc_ctx_t *ctxp;
ecc_mech_type_t mech_type;
ASSERT(ctx->cc_provider_private != NULL);
ctxp = ctx->cc_provider_private;
mech_type = ctxp->mech_type;
if (mech_type == ECDSA_MECH_INFO_TYPE) {
ecc_free_context(ctx);
return (CRYPTO_MECHANISM_INVALID);
}
if (mech_type == ECDSA_SHA1_MECH_INFO_TYPE)
rv = crypto_digest_data(data, &(ctxp->sha1_ctx), NULL,
(void (*)())SHA1Update, (void (*)())SHA1Final,
CRYPTO_DO_SHA1 | CRYPTO_DO_UPDATE);
if (rv != CRYPTO_SUCCESS)
ecc_free_context(ctx);
return (rv);
}
/* ARGSUSED */
static int
ecc_sign_final(crypto_ctx_t *ctx, crypto_data_t *signature,
crypto_req_handle_t req)
{
int rv;
digest_ecc_ctx_t *ctxp;
ASSERT(ctx->cc_provider_private != NULL);
ctxp = ctx->cc_provider_private;
rv = ecc_digest_svrfy_common(ctxp, NULL, signature, CRYPTO_DO_SIGN |
CRYPTO_DO_FINAL, req);
if (rv != CRYPTO_BUFFER_TOO_SMALL)
ecc_free_context(ctx);
return (rv);
}
/* ARGSUSED */
static int
ecc_sign_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 *signature,
crypto_spi_ctx_template_t ctx_template, crypto_req_handle_t req)
{
int rv;
ecc_mech_type_t mech_type = mechanism->cm_type;
uchar_t *params;
ssize_t params_len;
ECParams *ecparams;
SECKEYECParams params_item;
int kmflag;
if ((rv = check_mech_and_key(mech_type, key,
CKO_PRIVATE_KEY)) != CRYPTO_SUCCESS)
return (rv);
if (crypto_get_key_attr(key, CKA_EC_PARAMS, (void *) ¶ms,
¶ms_len)) {
return (CRYPTO_ARGUMENTS_BAD);
}
/* ASN1 check */
if (params[0] != 0x06 ||
params[1] != params_len - 2) {
return (CRYPTO_ATTRIBUTE_VALUE_INVALID);
}
params_item.data = params;
params_item.len = (uint_t)params_len;
kmflag = crypto_kmflag(req);
if (EC_DecodeParams(¶ms_item, &ecparams, kmflag) != SECSuccess) {
/* bad curve OID */
return (CRYPTO_ARGUMENTS_BAD);
}
if (mechanism->cm_type == ECDSA_MECH_INFO_TYPE) {
ecc_ctx_t ctx;
ctx.mech_type = mech_type;
/* structure assignment */
ctx.ecparams = *ecparams;
ctx.key = key;
rv = ecc_sign_common(&ctx, data, signature, req);
} else {
digest_ecc_ctx_t dctx;
dctx.mech_type = mech_type;
/* structure assignment */
dctx.ecparams = *ecparams;
dctx.key = key;
SHA1Init(&(dctx.sha1_ctx));
rv = ecc_digest_svrfy_common(&dctx, data, signature,
CRYPTO_DO_SIGN | CRYPTO_DO_UPDATE | CRYPTO_DO_FINAL, req);
}
free_ecparams(ecparams, B_TRUE);
return (rv);
}
static int
ecc_verify_common(ecc_ctx_t *ctx, crypto_data_t *data, crypto_data_t *signature,
crypto_req_handle_t req)
{
int rv = CRYPTO_FAILED;
uchar_t *param;
uchar_t *public;
ssize_t param_len;
ssize_t public_len;
uchar_t tmp_data[EC_MAX_DIGEST_LEN];
uchar_t signed_data[EC_MAX_SIG_LEN];
ECPublicKey ECkey;
SECItem signature_item;
SECItem digest_item;
crypto_key_t *key = ctx->key;
int kmflag;
if ((rv = crypto_get_key_attr(key, CKA_EC_PARAMS, ¶m,
¶m_len)) != CRYPTO_SUCCESS) {
return (rv);
}
if (signature->cd_length > sizeof (signed_data)) {
return (CRYPTO_SIGNATURE_LEN_RANGE);
}
if ((rv = crypto_get_input_data(signature, &signature_item.data,
signed_data)) != CRYPTO_SUCCESS) {
return (rv);
}
signature_item.len = signature->cd_length;
if (data->cd_length > sizeof (tmp_data))
return (CRYPTO_DATA_LEN_RANGE);
if ((rv = crypto_get_input_data(data, &digest_item.data, tmp_data))
!= CRYPTO_SUCCESS) {
return (rv);
}
digest_item.len = data->cd_length;
/* structure assignment */
ECkey.ecParams = ctx->ecparams;
if ((rv = crypto_get_key_attr(key, CKA_EC_POINT, &public,
&public_len)) != CRYPTO_SUCCESS) {
return (rv);
}
ECkey.publicValue.data = public;
ECkey.publicValue.len = (uint_t)public_len;
kmflag = crypto_kmflag(req);
if (ECDSA_VerifyDigest(&ECkey, &signature_item, &digest_item, kmflag)
!= SECSuccess) {
rv = CRYPTO_SIGNATURE_INVALID;
} else {
rv = CRYPTO_SUCCESS;
}
return (rv);
}
/* ARGSUSED */
static int
ecc_verify(crypto_ctx_t *ctx, crypto_data_t *data, crypto_data_t *signature,
crypto_req_handle_t req)
{
int rv;
ecc_ctx_t *ctxp;
ASSERT(ctx->cc_provider_private != NULL);
ctxp = ctx->cc_provider_private;
switch (ctxp->mech_type) {
case ECDSA_SHA1_MECH_INFO_TYPE:
rv = ecc_digest_svrfy_common((digest_ecc_ctx_t *)ctxp, data,
signature, CRYPTO_DO_VERIFY | CRYPTO_DO_UPDATE |
CRYPTO_DO_FINAL, req);
break;
default:
rv = ecc_verify_common(ctxp, data, signature, req);
break;
}
ecc_free_context(ctx);
return (rv);
}
/* ARGSUSED */
static int
ecc_verify_update(crypto_ctx_t *ctx, crypto_data_t *data,
crypto_req_handle_t req)
{
int rv;
digest_ecc_ctx_t *ctxp;
ASSERT(ctx->cc_provider_private != NULL);
ctxp = ctx->cc_provider_private;
switch (ctxp->mech_type) {
case ECDSA_SHA1_MECH_INFO_TYPE:
rv = crypto_digest_data(data, &(ctxp->sha1_ctx), NULL,
(void (*)())SHA1Update, (void (*)())SHA1Final,
CRYPTO_DO_SHA1 | CRYPTO_DO_UPDATE);
break;
default:
rv = CRYPTO_MECHANISM_INVALID;
}
if (rv != CRYPTO_SUCCESS)
ecc_free_context(ctx);
return (rv);
}
/* ARGSUSED */
static int
ecc_verify_final(crypto_ctx_t *ctx, crypto_data_t *signature,
crypto_req_handle_t req)
{
int rv;
digest_ecc_ctx_t *ctxp;
ASSERT(ctx->cc_provider_private != NULL);
ctxp = ctx->cc_provider_private;
rv = ecc_digest_svrfy_common(ctxp, NULL, signature,
CRYPTO_DO_VERIFY | CRYPTO_DO_FINAL, req);
ecc_free_context(ctx);
return (rv);
}
/* ARGSUSED */
static int
ecc_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 *signature,
crypto_spi_ctx_template_t ctx_template, crypto_req_handle_t req)
{
int rv;
ecc_mech_type_t mech_type = mechanism->cm_type;
uchar_t *params;
ssize_t params_len;
ECParams *ecparams;
SECKEYECParams params_item;
int kmflag;
if ((rv = check_mech_and_key(mech_type, key,
CKO_PUBLIC_KEY)) != CRYPTO_SUCCESS)
return (rv);
if (crypto_get_key_attr(key, CKA_EC_PARAMS, (void *) ¶ms,
¶ms_len)) {
return (CRYPTO_ARGUMENTS_BAD);
}
/* ASN1 check */
if (params[0] != 0x06 ||