mirror of
https://github.com/torvalds/linux.git
synced 2024-11-21 19:41:42 +00:00
crypto: sm2 - Remove sm2 algorithm
The SM2 algorithm has a single user in the kernel. However, it's never been integrated properly with that user: asymmetric_keys. The crux of the issue is that the way it computes its digest with sm3 does not fit into the architecture of asymmetric_keys. As no solution has been proposed, remove this algorithm. It can be resubmitted when it is integrated properly into the asymmetric_keys subsystem. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
parent
4c6338f866
commit
46b3ff73af
@ -313,24 +313,6 @@ config CRYPTO_ECRDSA
|
||||
One of the Russian cryptographic standard algorithms (called GOST
|
||||
algorithms). Only signature verification is implemented.
|
||||
|
||||
config CRYPTO_SM2
|
||||
tristate "SM2 (ShangMi 2)"
|
||||
select CRYPTO_SM3
|
||||
select CRYPTO_AKCIPHER
|
||||
select CRYPTO_MANAGER
|
||||
select MPILIB
|
||||
select ASN1
|
||||
help
|
||||
SM2 (ShangMi 2) public key algorithm
|
||||
|
||||
Published by State Encryption Management Bureau, China,
|
||||
as specified by OSCCA GM/T 0003.1-2012 -- 0003.5-2012.
|
||||
|
||||
References:
|
||||
https://datatracker.ietf.org/doc/draft-shen-sm2-ecdsa/
|
||||
http://www.oscca.gov.cn/sca/xxgk/2010-12/17/content_1002386.shtml
|
||||
http://www.gmbz.org.cn/main/bzlb.html
|
||||
|
||||
config CRYPTO_CURVE25519
|
||||
tristate "Curve25519"
|
||||
select CRYPTO_KPP
|
||||
|
||||
@ -50,14 +50,6 @@ rsa_generic-y += rsa_helper.o
|
||||
rsa_generic-y += rsa-pkcs1pad.o
|
||||
obj-$(CONFIG_CRYPTO_RSA) += rsa_generic.o
|
||||
|
||||
$(obj)/sm2signature.asn1.o: $(obj)/sm2signature.asn1.c $(obj)/sm2signature.asn1.h
|
||||
$(obj)/sm2.o: $(obj)/sm2signature.asn1.h
|
||||
|
||||
sm2_generic-y += sm2signature.asn1.o
|
||||
sm2_generic-y += sm2.o
|
||||
|
||||
obj-$(CONFIG_CRYPTO_SM2) += sm2_generic.o
|
||||
|
||||
$(obj)/ecdsasignature.asn1.o: $(obj)/ecdsasignature.asn1.c $(obj)/ecdsasignature.asn1.h
|
||||
$(obj)/ecdsa.o: $(obj)/ecdsasignature.asn1.h
|
||||
ecdsa_generic-y += ecdsa.o
|
||||
|
||||
@ -292,10 +292,6 @@ int pkcs7_sig_note_pkey_algo(void *context, size_t hdrlen,
|
||||
ctx->sinfo->sig->pkey_algo = "ecdsa";
|
||||
ctx->sinfo->sig->encoding = "x962";
|
||||
break;
|
||||
case OID_SM2_with_SM3:
|
||||
ctx->sinfo->sig->pkey_algo = "sm2";
|
||||
ctx->sinfo->sig->encoding = "raw";
|
||||
break;
|
||||
case OID_gost2012PKey256:
|
||||
case OID_gost2012PKey512:
|
||||
ctx->sinfo->sig->pkey_algo = "ecrdsa";
|
||||
|
||||
@ -124,13 +124,6 @@ software_key_determine_akcipher(const struct public_key *pkey,
|
||||
strcmp(hash_algo, "sha3-384") != 0 &&
|
||||
strcmp(hash_algo, "sha3-512") != 0)
|
||||
return -EINVAL;
|
||||
} else if (strcmp(pkey->pkey_algo, "sm2") == 0) {
|
||||
if (strcmp(encoding, "raw") != 0)
|
||||
return -EINVAL;
|
||||
if (!hash_algo)
|
||||
return -EINVAL;
|
||||
if (strcmp(hash_algo, "sm3") != 0)
|
||||
return -EINVAL;
|
||||
} else if (strcmp(pkey->pkey_algo, "ecrdsa") == 0) {
|
||||
if (strcmp(encoding, "raw") != 0)
|
||||
return -EINVAL;
|
||||
|
||||
@ -257,10 +257,6 @@ int x509_note_sig_algo(void *context, size_t hdrlen, unsigned char tag,
|
||||
case OID_gost2012Signature512:
|
||||
ctx->cert->sig->hash_algo = "streebog512";
|
||||
goto ecrdsa;
|
||||
|
||||
case OID_SM2_with_SM3:
|
||||
ctx->cert->sig->hash_algo = "sm3";
|
||||
goto sm2;
|
||||
}
|
||||
|
||||
rsa_pkcs1:
|
||||
@ -273,11 +269,6 @@ ecrdsa:
|
||||
ctx->cert->sig->encoding = "raw";
|
||||
ctx->sig_algo = ctx->last_oid;
|
||||
return 0;
|
||||
sm2:
|
||||
ctx->cert->sig->pkey_algo = "sm2";
|
||||
ctx->cert->sig->encoding = "raw";
|
||||
ctx->sig_algo = ctx->last_oid;
|
||||
return 0;
|
||||
ecdsa:
|
||||
ctx->cert->sig->pkey_algo = "ecdsa";
|
||||
ctx->cert->sig->encoding = "x962";
|
||||
@ -309,7 +300,6 @@ int x509_note_signature(void *context, size_t hdrlen,
|
||||
|
||||
if (strcmp(ctx->cert->sig->pkey_algo, "rsa") == 0 ||
|
||||
strcmp(ctx->cert->sig->pkey_algo, "ecrdsa") == 0 ||
|
||||
strcmp(ctx->cert->sig->pkey_algo, "sm2") == 0 ||
|
||||
strcmp(ctx->cert->sig->pkey_algo, "ecdsa") == 0) {
|
||||
/* Discard the BIT STRING metadata */
|
||||
if (vlen < 1 || *(const u8 *)value != 0)
|
||||
@ -514,17 +504,11 @@ int x509_extract_key_data(void *context, size_t hdrlen,
|
||||
case OID_gost2012PKey512:
|
||||
ctx->cert->pub->pkey_algo = "ecrdsa";
|
||||
break;
|
||||
case OID_sm2:
|
||||
ctx->cert->pub->pkey_algo = "sm2";
|
||||
break;
|
||||
case OID_id_ecPublicKey:
|
||||
if (parse_OID(ctx->params, ctx->params_size, &oid) != 0)
|
||||
return -EBADMSG;
|
||||
|
||||
switch (oid) {
|
||||
case OID_sm2:
|
||||
ctx->cert->pub->pkey_algo = "sm2";
|
||||
break;
|
||||
case OID_id_prime192v1:
|
||||
ctx->cert->pub->pkey_algo = "ecdsa-nist-p192";
|
||||
break;
|
||||
|
||||
@ -7,7 +7,6 @@
|
||||
|
||||
#define pr_fmt(fmt) "X.509: "fmt
|
||||
#include <crypto/hash.h>
|
||||
#include <crypto/sm2.h>
|
||||
#include <keys/asymmetric-parser.h>
|
||||
#include <keys/asymmetric-subtype.h>
|
||||
#include <keys/system_keyring.h>
|
||||
@ -64,20 +63,8 @@ int x509_get_sig_params(struct x509_certificate *cert)
|
||||
|
||||
desc->tfm = tfm;
|
||||
|
||||
if (strcmp(cert->pub->pkey_algo, "sm2") == 0) {
|
||||
ret = strcmp(sig->hash_algo, "sm3") != 0 ? -EINVAL :
|
||||
crypto_shash_init(desc) ?:
|
||||
sm2_compute_z_digest(desc, cert->pub->key,
|
||||
cert->pub->keylen, sig->digest) ?:
|
||||
crypto_shash_init(desc) ?:
|
||||
crypto_shash_update(desc, sig->digest,
|
||||
sig->digest_size) ?:
|
||||
crypto_shash_finup(desc, cert->tbs, cert->tbs_size,
|
||||
sig->digest);
|
||||
} else {
|
||||
ret = crypto_shash_digest(desc, cert->tbs, cert->tbs_size,
|
||||
sig->digest);
|
||||
}
|
||||
ret = crypto_shash_digest(desc, cert->tbs, cert->tbs_size,
|
||||
sig->digest);
|
||||
|
||||
if (ret < 0)
|
||||
goto error_2;
|
||||
|
||||
498
crypto/sm2.c
498
crypto/sm2.c
@ -1,498 +0,0 @@
|
||||
// SPDX-License-Identifier: GPL-2.0-or-later
|
||||
/*
|
||||
* SM2 asymmetric public-key algorithm
|
||||
* as specified by OSCCA GM/T 0003.1-2012 -- 0003.5-2012 SM2 and
|
||||
* described at https://tools.ietf.org/html/draft-shen-sm2-ecdsa-02
|
||||
*
|
||||
* Copyright (c) 2020, Alibaba Group.
|
||||
* Authors: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/mpi.h>
|
||||
#include <crypto/internal/akcipher.h>
|
||||
#include <crypto/akcipher.h>
|
||||
#include <crypto/hash.h>
|
||||
#include <crypto/rng.h>
|
||||
#include <crypto/sm2.h>
|
||||
#include "sm2signature.asn1.h"
|
||||
|
||||
/* The default user id as specified in GM/T 0009-2012 */
|
||||
#define SM2_DEFAULT_USERID "1234567812345678"
|
||||
#define SM2_DEFAULT_USERID_LEN 16
|
||||
|
||||
#define MPI_NBYTES(m) ((mpi_get_nbits(m) + 7) / 8)
|
||||
|
||||
struct ecc_domain_parms {
|
||||
const char *desc; /* Description of the curve. */
|
||||
unsigned int nbits; /* Number of bits. */
|
||||
unsigned int fips:1; /* True if this is a FIPS140-2 approved curve */
|
||||
|
||||
/* The model describing this curve. This is mainly used to select
|
||||
* the group equation.
|
||||
*/
|
||||
enum gcry_mpi_ec_models model;
|
||||
|
||||
/* The actual ECC dialect used. This is used for curve specific
|
||||
* optimizations and to select encodings etc.
|
||||
*/
|
||||
enum ecc_dialects dialect;
|
||||
|
||||
const char *p; /* The prime defining the field. */
|
||||
const char *a, *b; /* The coefficients. For Twisted Edwards
|
||||
* Curves b is used for d. For Montgomery
|
||||
* Curves (a,b) has ((A-2)/4,B^-1).
|
||||
*/
|
||||
const char *n; /* The order of the base point. */
|
||||
const char *g_x, *g_y; /* Base point. */
|
||||
unsigned int h; /* Cofactor. */
|
||||
};
|
||||
|
||||
static const struct ecc_domain_parms sm2_ecp = {
|
||||
.desc = "sm2p256v1",
|
||||
.nbits = 256,
|
||||
.fips = 0,
|
||||
.model = MPI_EC_WEIERSTRASS,
|
||||
.dialect = ECC_DIALECT_STANDARD,
|
||||
.p = "0xfffffffeffffffffffffffffffffffffffffffff00000000ffffffffffffffff",
|
||||
.a = "0xfffffffeffffffffffffffffffffffffffffffff00000000fffffffffffffffc",
|
||||
.b = "0x28e9fa9e9d9f5e344d5a9e4bcf6509a7f39789f515ab8f92ddbcbd414d940e93",
|
||||
.n = "0xfffffffeffffffffffffffffffffffff7203df6b21c6052b53bbf40939d54123",
|
||||
.g_x = "0x32c4ae2c1f1981195f9904466a39c9948fe30bbff2660be1715a4589334c74c7",
|
||||
.g_y = "0xbc3736a2f4f6779c59bdcee36b692153d0a9877cc62a474002df32e52139f0a0",
|
||||
.h = 1
|
||||
};
|
||||
|
||||
static int __sm2_set_pub_key(struct mpi_ec_ctx *ec,
|
||||
const void *key, unsigned int keylen);
|
||||
|
||||
static int sm2_ec_ctx_init(struct mpi_ec_ctx *ec)
|
||||
{
|
||||
const struct ecc_domain_parms *ecp = &sm2_ecp;
|
||||
MPI p, a, b;
|
||||
MPI x, y;
|
||||
int rc = -EINVAL;
|
||||
|
||||
p = mpi_scanval(ecp->p);
|
||||
a = mpi_scanval(ecp->a);
|
||||
b = mpi_scanval(ecp->b);
|
||||
if (!p || !a || !b)
|
||||
goto free_p;
|
||||
|
||||
x = mpi_scanval(ecp->g_x);
|
||||
y = mpi_scanval(ecp->g_y);
|
||||
if (!x || !y)
|
||||
goto free;
|
||||
|
||||
rc = -ENOMEM;
|
||||
|
||||
ec->Q = mpi_point_new(0);
|
||||
if (!ec->Q)
|
||||
goto free;
|
||||
|
||||
/* mpi_ec_setup_elliptic_curve */
|
||||
ec->G = mpi_point_new(0);
|
||||
if (!ec->G) {
|
||||
mpi_point_release(ec->Q);
|
||||
goto free;
|
||||
}
|
||||
|
||||
mpi_set(ec->G->x, x);
|
||||
mpi_set(ec->G->y, y);
|
||||
mpi_set_ui(ec->G->z, 1);
|
||||
|
||||
rc = -EINVAL;
|
||||
ec->n = mpi_scanval(ecp->n);
|
||||
if (!ec->n) {
|
||||
mpi_point_release(ec->Q);
|
||||
mpi_point_release(ec->G);
|
||||
goto free;
|
||||
}
|
||||
|
||||
ec->h = ecp->h;
|
||||
ec->name = ecp->desc;
|
||||
mpi_ec_init(ec, ecp->model, ecp->dialect, 0, p, a, b);
|
||||
|
||||
rc = 0;
|
||||
|
||||
free:
|
||||
mpi_free(x);
|
||||
mpi_free(y);
|
||||
free_p:
|
||||
mpi_free(p);
|
||||
mpi_free(a);
|
||||
mpi_free(b);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
static void sm2_ec_ctx_deinit(struct mpi_ec_ctx *ec)
|
||||
{
|
||||
mpi_ec_deinit(ec);
|
||||
|
||||
memset(ec, 0, sizeof(*ec));
|
||||
}
|
||||
|
||||
/* RESULT must have been initialized and is set on success to the
|
||||
* point given by VALUE.
|
||||
*/
|
||||
static int sm2_ecc_os2ec(MPI_POINT result, MPI value)
|
||||
{
|
||||
int rc;
|
||||
size_t n;
|
||||
unsigned char *buf;
|
||||
MPI x, y;
|
||||
|
||||
n = MPI_NBYTES(value);
|
||||
buf = kmalloc(n, GFP_KERNEL);
|
||||
if (!buf)
|
||||
return -ENOMEM;
|
||||
|
||||
rc = mpi_print(GCRYMPI_FMT_USG, buf, n, &n, value);
|
||||
if (rc)
|
||||
goto err_freebuf;
|
||||
|
||||
rc = -EINVAL;
|
||||
if (n < 1 || ((n - 1) % 2))
|
||||
goto err_freebuf;
|
||||
/* No support for point compression */
|
||||
if (*buf != 0x4)
|
||||
goto err_freebuf;
|
||||
|
||||
rc = -ENOMEM;
|
||||
n = (n - 1) / 2;
|
||||
x = mpi_read_raw_data(buf + 1, n);
|
||||
if (!x)
|
||||
goto err_freebuf;
|
||||
y = mpi_read_raw_data(buf + 1 + n, n);
|
||||
if (!y)
|
||||
goto err_freex;
|
||||
|
||||
mpi_normalize(x);
|
||||
mpi_normalize(y);
|
||||
mpi_set(result->x, x);
|
||||
mpi_set(result->y, y);
|
||||
mpi_set_ui(result->z, 1);
|
||||
|
||||
rc = 0;
|
||||
|
||||
mpi_free(y);
|
||||
err_freex:
|
||||
mpi_free(x);
|
||||
err_freebuf:
|
||||
kfree(buf);
|
||||
return rc;
|
||||
}
|
||||
|
||||
struct sm2_signature_ctx {
|
||||
MPI sig_r;
|
||||
MPI sig_s;
|
||||
};
|
||||
|
||||
int sm2_get_signature_r(void *context, size_t hdrlen, unsigned char tag,
|
||||
const void *value, size_t vlen)
|
||||
{
|
||||
struct sm2_signature_ctx *sig = context;
|
||||
|
||||
if (!value || !vlen)
|
||||
return -EINVAL;
|
||||
|
||||
sig->sig_r = mpi_read_raw_data(value, vlen);
|
||||
if (!sig->sig_r)
|
||||
return -ENOMEM;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int sm2_get_signature_s(void *context, size_t hdrlen, unsigned char tag,
|
||||
const void *value, size_t vlen)
|
||||
{
|
||||
struct sm2_signature_ctx *sig = context;
|
||||
|
||||
if (!value || !vlen)
|
||||
return -EINVAL;
|
||||
|
||||
sig->sig_s = mpi_read_raw_data(value, vlen);
|
||||
if (!sig->sig_s)
|
||||
return -ENOMEM;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int sm2_z_digest_update(struct shash_desc *desc,
|
||||
MPI m, unsigned int pbytes)
|
||||
{
|
||||
static const unsigned char zero[32];
|
||||
unsigned char *in;
|
||||
unsigned int inlen;
|
||||
int err;
|
||||
|
||||
in = mpi_get_buffer(m, &inlen, NULL);
|
||||
if (!in)
|
||||
return -EINVAL;
|
||||
|
||||
if (inlen < pbytes) {
|
||||
/* padding with zero */
|
||||
err = crypto_shash_update(desc, zero, pbytes - inlen) ?:
|
||||
crypto_shash_update(desc, in, inlen);
|
||||
} else if (inlen > pbytes) {
|
||||
/* skip the starting zero */
|
||||
err = crypto_shash_update(desc, in + inlen - pbytes, pbytes);
|
||||
} else {
|
||||
err = crypto_shash_update(desc, in, inlen);
|
||||
}
|
||||
|
||||
kfree(in);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int sm2_z_digest_update_point(struct shash_desc *desc,
|
||||
MPI_POINT point, struct mpi_ec_ctx *ec,
|
||||
unsigned int pbytes)
|
||||
{
|
||||
MPI x, y;
|
||||
int ret = -EINVAL;
|
||||
|
||||
x = mpi_new(0);
|
||||
y = mpi_new(0);
|
||||
|
||||
ret = mpi_ec_get_affine(x, y, point, ec) ? -EINVAL :
|
||||
sm2_z_digest_update(desc, x, pbytes) ?:
|
||||
sm2_z_digest_update(desc, y, pbytes);
|
||||
|
||||
mpi_free(x);
|
||||
mpi_free(y);
|
||||
return ret;
|
||||
}
|
||||
|
||||
int sm2_compute_z_digest(struct shash_desc *desc,
|
||||
const void *key, unsigned int keylen, void *dgst)
|
||||
{
|
||||
struct mpi_ec_ctx *ec;
|
||||
unsigned int bits_len;
|
||||
unsigned int pbytes;
|
||||
u8 entl[2];
|
||||
int err;
|
||||
|
||||
ec = kmalloc(sizeof(*ec), GFP_KERNEL);
|
||||
if (!ec)
|
||||
return -ENOMEM;
|
||||
|
||||
err = sm2_ec_ctx_init(ec);
|
||||
if (err)
|
||||
goto out_free_ec;
|
||||
|
||||
err = __sm2_set_pub_key(ec, key, keylen);
|
||||
if (err)
|
||||
goto out_deinit_ec;
|
||||
|
||||
bits_len = SM2_DEFAULT_USERID_LEN * 8;
|
||||
entl[0] = bits_len >> 8;
|
||||
entl[1] = bits_len & 0xff;
|
||||
|
||||
pbytes = MPI_NBYTES(ec->p);
|
||||
|
||||
/* ZA = H256(ENTLA | IDA | a | b | xG | yG | xA | yA) */
|
||||
err = crypto_shash_init(desc);
|
||||
if (err)
|
||||
goto out_deinit_ec;
|
||||
|
||||
err = crypto_shash_update(desc, entl, 2);
|
||||
if (err)
|
||||
goto out_deinit_ec;
|
||||
|
||||
err = crypto_shash_update(desc, SM2_DEFAULT_USERID,
|
||||
SM2_DEFAULT_USERID_LEN);
|
||||
if (err)
|
||||
goto out_deinit_ec;
|
||||
|
||||
err = sm2_z_digest_update(desc, ec->a, pbytes) ?:
|
||||
sm2_z_digest_update(desc, ec->b, pbytes) ?:
|
||||
sm2_z_digest_update_point(desc, ec->G, ec, pbytes) ?:
|
||||
sm2_z_digest_update_point(desc, ec->Q, ec, pbytes);
|
||||
if (err)
|
||||
goto out_deinit_ec;
|
||||
|
||||
err = crypto_shash_final(desc, dgst);
|
||||
|
||||
out_deinit_ec:
|
||||
sm2_ec_ctx_deinit(ec);
|
||||
out_free_ec:
|
||||
kfree(ec);
|
||||
return err;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(sm2_compute_z_digest);
|
||||
|
||||
static int _sm2_verify(struct mpi_ec_ctx *ec, MPI hash, MPI sig_r, MPI sig_s)
|
||||
{
|
||||
int rc = -EINVAL;
|
||||
struct gcry_mpi_point sG, tP;
|
||||
MPI t = NULL;
|
||||
MPI x1 = NULL, y1 = NULL;
|
||||
|
||||
mpi_point_init(&sG);
|
||||
mpi_point_init(&tP);
|
||||
x1 = mpi_new(0);
|
||||
y1 = mpi_new(0);
|
||||
t = mpi_new(0);
|
||||
|
||||
/* r, s in [1, n-1] */
|
||||
if (mpi_cmp_ui(sig_r, 1) < 0 || mpi_cmp(sig_r, ec->n) > 0 ||
|
||||
mpi_cmp_ui(sig_s, 1) < 0 || mpi_cmp(sig_s, ec->n) > 0) {
|
||||
goto leave;
|
||||
}
|
||||
|
||||
/* t = (r + s) % n, t == 0 */
|
||||
mpi_addm(t, sig_r, sig_s, ec->n);
|
||||
if (mpi_cmp_ui(t, 0) == 0)
|
||||
goto leave;
|
||||
|
||||
/* sG + tP = (x1, y1) */
|
||||
rc = -EBADMSG;
|
||||
mpi_ec_mul_point(&sG, sig_s, ec->G, ec);
|
||||
mpi_ec_mul_point(&tP, t, ec->Q, ec);
|
||||
mpi_ec_add_points(&sG, &sG, &tP, ec);
|
||||
if (mpi_ec_get_affine(x1, y1, &sG, ec))
|
||||
goto leave;
|
||||
|
||||
/* R = (e + x1) % n */
|
||||
mpi_addm(t, hash, x1, ec->n);
|
||||
|
||||
/* check R == r */
|
||||
rc = -EKEYREJECTED;
|
||||
if (mpi_cmp(t, sig_r))
|
||||
goto leave;
|
||||
|
||||
rc = 0;
|
||||
|
||||
leave:
|
||||
mpi_point_free_parts(&sG);
|
||||
mpi_point_free_parts(&tP);
|
||||
mpi_free(x1);
|
||||
mpi_free(y1);
|
||||
mpi_free(t);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int sm2_verify(struct akcipher_request *req)
|
||||
{
|
||||
struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
|
||||
struct mpi_ec_ctx *ec = akcipher_tfm_ctx(tfm);
|
||||
unsigned char *buffer;
|
||||
struct sm2_signature_ctx sig;
|
||||
MPI hash;
|
||||
int ret;
|
||||
|
||||
if (unlikely(!ec->Q))
|
||||
return -EINVAL;
|
||||
|
||||
buffer = kmalloc(req->src_len + req->dst_len, GFP_KERNEL);
|
||||
if (!buffer)
|
||||
return -ENOMEM;
|
||||
|
||||
sg_pcopy_to_buffer(req->src,
|
||||
sg_nents_for_len(req->src, req->src_len + req->dst_len),
|
||||
buffer, req->src_len + req->dst_len, 0);
|
||||
|
||||
sig.sig_r = NULL;
|
||||
sig.sig_s = NULL;
|
||||
ret = asn1_ber_decoder(&sm2signature_decoder, &sig,
|
||||
buffer, req->src_len);
|
||||
if (ret)
|
||||
goto error;
|
||||
|
||||
ret = -ENOMEM;
|
||||
hash = mpi_read_raw_data(buffer + req->src_len, req->dst_len);
|
||||
if (!hash)
|
||||
goto error;
|
||||
|
||||
ret = _sm2_verify(ec, hash, sig.sig_r, sig.sig_s);
|
||||
|
||||
mpi_free(hash);
|
||||
error:
|
||||
mpi_free(sig.sig_r);
|
||||
mpi_free(sig.sig_s);
|
||||
kfree(buffer);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int sm2_set_pub_key(struct crypto_akcipher *tfm,
|
||||
const void *key, unsigned int keylen)
|
||||
{
|
||||
struct mpi_ec_ctx *ec = akcipher_tfm_ctx(tfm);
|
||||
|
||||
return __sm2_set_pub_key(ec, key, keylen);
|
||||
|
||||
}
|
||||
|
||||
static int __sm2_set_pub_key(struct mpi_ec_ctx *ec,
|
||||
const void *key, unsigned int keylen)
|
||||
{
|
||||
MPI a;
|
||||
int rc;
|
||||
|
||||
/* include the uncompressed flag '0x04' */
|
||||
a = mpi_read_raw_data(key, keylen);
|
||||
if (!a)
|
||||
return -ENOMEM;
|
||||
|
||||
mpi_normalize(a);
|
||||
rc = sm2_ecc_os2ec(ec->Q, a);
|
||||
mpi_free(a);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
static unsigned int sm2_max_size(struct crypto_akcipher *tfm)
|
||||
{
|
||||
/* Unlimited max size */
|
||||
return PAGE_SIZE;
|
||||
}
|
||||
|
||||
static int sm2_init_tfm(struct crypto_akcipher *tfm)
|
||||
{
|
||||
struct mpi_ec_ctx *ec = akcipher_tfm_ctx(tfm);
|
||||
|
||||
return sm2_ec_ctx_init(ec);
|
||||
}
|
||||
|
||||
static void sm2_exit_tfm(struct crypto_akcipher *tfm)
|
||||
{
|
||||
struct mpi_ec_ctx *ec = akcipher_tfm_ctx(tfm);
|
||||
|
||||
sm2_ec_ctx_deinit(ec);
|
||||
}
|
||||
|
||||
static struct akcipher_alg sm2 = {
|
||||
.verify = sm2_verify,
|
||||
.set_pub_key = sm2_set_pub_key,
|
||||
.max_size = sm2_max_size,
|
||||
.init = sm2_init_tfm,
|
||||
.exit = sm2_exit_tfm,
|
||||
.base = {
|
||||
.cra_name = "sm2",
|
||||
.cra_driver_name = "sm2-generic",
|
||||
.cra_priority = 100,
|
||||
.cra_module = THIS_MODULE,
|
||||
.cra_ctxsize = sizeof(struct mpi_ec_ctx),
|
||||
},
|
||||
};
|
||||
|
||||
static int __init sm2_init(void)
|
||||
{
|
||||
return crypto_register_akcipher(&sm2);
|
||||
}
|
||||
|
||||
static void __exit sm2_exit(void)
|
||||
{
|
||||
crypto_unregister_akcipher(&sm2);
|
||||
}
|
||||
|
||||
subsys_initcall(sm2_init);
|
||||
module_exit(sm2_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_AUTHOR("Tianjia Zhang <tianjia.zhang@linux.alibaba.com>");
|
||||
MODULE_DESCRIPTION("SM2 generic algorithm");
|
||||
MODULE_ALIAS_CRYPTO("sm2-generic");
|
||||
@ -1,4 +0,0 @@
|
||||
Sm2Signature ::= SEQUENCE {
|
||||
sig_r INTEGER ({ sm2_get_signature_r }),
|
||||
sig_s INTEGER ({ sm2_get_signature_s })
|
||||
}
|
||||
@ -5608,12 +5608,6 @@ static const struct alg_test_desc alg_test_descs[] = {
|
||||
.suite = {
|
||||
.hash = __VECS(sha512_tv_template)
|
||||
}
|
||||
}, {
|
||||
.alg = "sm2",
|
||||
.test = alg_test_akcipher,
|
||||
.suite = {
|
||||
.akcipher = __VECS(sm2_tv_template)
|
||||
}
|
||||
}, {
|
||||
.alg = "sm3",
|
||||
.test = alg_test_hash,
|
||||
|
||||
@ -5774,65 +5774,6 @@ static const struct hash_testvec hmac_streebog512_tv_template[] = {
|
||||
},
|
||||
};
|
||||
|
||||
/*
|
||||
* SM2 test vectors.
|
||||
*/
|
||||
static const struct akcipher_testvec sm2_tv_template[] = {
|
||||
{ /* Generated from openssl */
|
||||
.key =
|
||||
"\x04"
|
||||
"\x8e\xa0\x33\x69\x91\x7e\x3d\xec\xad\x8e\xf0\x45\x5e\x13\x3e\x68"
|
||||
"\x5b\x8c\xab\x5c\xc6\xc8\x50\xdf\x91\x00\xe0\x24\x73\x4d\x31\xf2"
|
||||
"\x2e\xc0\xd5\x6b\xee\xda\x98\x93\xec\xd8\x36\xaa\xb9\xcf\x63\x82"
|
||||
"\xef\xa7\x1a\x03\xed\x16\xba\x74\xb8\x8b\xf9\xe5\x70\x39\xa4\x70",
|
||||
.key_len = 65,
|
||||
.param_len = 0,
|
||||
.c =
|
||||
"\x30\x45"
|
||||
"\x02\x20"
|
||||
"\x70\xab\xb6\x7d\xd6\x54\x80\x64\x42\x7e\x2d\x05\x08\x36\xc9\x96"
|
||||
"\x25\xc2\xbb\xff\x08\xe5\x43\x15\x5e\xf3\x06\xd9\x2b\x2f\x0a\x9f"
|
||||
"\x02\x21"
|
||||
"\x00"
|
||||
"\xbf\x21\x5f\x7e\x5d\x3f\x1a\x4d\x8f\x84\xc2\xe9\xa6\x4c\xa4\x18"
|
||||
"\xb2\xb8\x46\xf4\x32\x96\xfa\x57\xc6\x29\xd4\x89\xae\xcc\xda\xdb",
|
||||
.c_size = 71,
|
||||
.algo = OID_SM2_with_SM3,
|
||||
.m =
|
||||
"\x47\xa7\xbf\xd3\xda\xc4\x79\xee\xda\x8b\x4f\xe8\x40\x94\xd4\x32"
|
||||
"\x8f\xf1\xcd\x68\x4d\xbd\x9b\x1d\xe0\xd8\x9a\x5d\xad\x85\x47\x5c",
|
||||
.m_size = 32,
|
||||
.public_key_vec = true,
|
||||
.siggen_sigver_test = true,
|
||||
},
|
||||
{ /* From libgcrypt */
|
||||
.key =
|
||||
"\x04"
|
||||
"\x87\x59\x38\x9a\x34\xaa\xad\x07\xec\xf4\xe0\xc8\xc2\x65\x0a\x44"
|
||||
"\x59\xc8\xd9\x26\xee\x23\x78\x32\x4e\x02\x61\xc5\x25\x38\xcb\x47"
|
||||
"\x75\x28\x10\x6b\x1e\x0b\x7c\x8d\xd5\xff\x29\xa9\xc8\x6a\x89\x06"
|
||||
"\x56\x56\xeb\x33\x15\x4b\xc0\x55\x60\x91\xef\x8a\xc9\xd1\x7d\x78",
|
||||
.key_len = 65,
|
||||
.param_len = 0,
|
||||
.c =
|
||||
"\x30\x44"
|
||||
"\x02\x20"
|
||||
"\xd9\xec\xef\xe8\x5f\xee\x3c\x59\x57\x8e\x5b\xab\xb3\x02\xe1\x42"
|
||||
"\x4b\x67\x2c\x0b\x26\xb6\x51\x2c\x3e\xfc\xc6\x49\xec\xfe\x89\xe5"
|
||||
"\x02\x20"
|
||||
"\x43\x45\xd0\xa5\xff\xe5\x13\x27\x26\xd0\xec\x37\xad\x24\x1e\x9a"
|
||||
"\x71\x9a\xa4\x89\xb0\x7e\x0f\xc4\xbb\x2d\x50\xd0\xe5\x7f\x7a\x68",
|
||||
.c_size = 70,
|
||||
.algo = OID_SM2_with_SM3,
|
||||
.m =
|
||||
"\x11\x22\x33\x44\x55\x66\x77\x88\x99\xaa\xbb\xcc\xdd\xee\xff\x00"
|
||||
"\x12\x34\x56\x78\x9a\xbc\xde\xf0\x12\x34\x56\x78\x9a\xbc\xde\xf0",
|
||||
.m_size = 32,
|
||||
.public_key_vec = true,
|
||||
.siggen_sigver_test = true,
|
||||
},
|
||||
};
|
||||
|
||||
/* Example vectors below taken from
|
||||
* http://www.oscca.gov.cn/UpFile/20101222141857786.pdf
|
||||
*
|
||||
|
||||
@ -1,28 +0,0 @@
|
||||
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
||||
/*
|
||||
* sm2.h - SM2 asymmetric public-key algorithm
|
||||
* as specified by OSCCA GM/T 0003.1-2012 -- 0003.5-2012 SM2 and
|
||||
* described at https://tools.ietf.org/html/draft-shen-sm2-ecdsa-02
|
||||
*
|
||||
* Copyright (c) 2020, Alibaba Group.
|
||||
* Written by Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
|
||||
*/
|
||||
|
||||
#ifndef _CRYPTO_SM2_H
|
||||
#define _CRYPTO_SM2_H
|
||||
|
||||
struct shash_desc;
|
||||
|
||||
#if IS_REACHABLE(CONFIG_CRYPTO_SM2)
|
||||
int sm2_compute_z_digest(struct shash_desc *desc,
|
||||
const void *key, unsigned int keylen, void *dgst);
|
||||
#else
|
||||
static inline int sm2_compute_z_digest(struct shash_desc *desc,
|
||||
const void *key, unsigned int keylen,
|
||||
void *dgst)
|
||||
{
|
||||
return -ENOTSUPP;
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* _CRYPTO_SM2_H */
|
||||
@ -114,8 +114,7 @@ int asymmetric_verify(struct key *keyring, const char *sig,
|
||||
} else if (!strncmp(pk->pkey_algo, "ecdsa-", 6)) {
|
||||
/* edcsa-nist-p192 etc. */
|
||||
pks.encoding = "x962";
|
||||
} else if (!strcmp(pk->pkey_algo, "ecrdsa") ||
|
||||
!strcmp(pk->pkey_algo, "sm2")) {
|
||||
} else if (!strcmp(pk->pkey_algo, "ecrdsa")) {
|
||||
pks.encoding = "raw";
|
||||
} else {
|
||||
ret = -ENOPKG;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user