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This commit is contained in:
Zhi Guan
2017-04-14 15:31:35 +08:00
parent 7fa961cd6f
commit eb21e9d572
76 changed files with 3249 additions and 2961 deletions
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4
crypto/sm2/build.info
View File

@@ -1,3 +1,3 @@
LIBS=../../libcrypto
SOURCE[../../libcrypto]=sm2_asn1.c sm2_id.c sm2_sign.c sm2_enc.c sm2_kap.c \
sm2_kmeth.c
SOURCE[../../libcrypto]=sm2_err.c sm2_asn1.c sm2_id.c sm2_sign.c sm2_enc.c \
sm2_exch.c sm2_kmeth.c

139
crypto/sm2/sm2_asn1.c
View File

@@ -55,147 +55,14 @@
#include <openssl/asn1t.h>
#include <openssl/objects.h>
#include <openssl/obj_mac.h>
#include "sm2_lcl.h"
typedef struct SM2CiphertextValue_st {
ASN1_INTEGER *xCoordinate;
ASN1_INTEGER *yCoordinate;
ASN1_OCTET_STRING *hash;
ASN1_OCTET_STRING *ciphertext;
} SM2CiphertextValue;
ASN1_SEQUENCE(SM2CiphertextValue) = {
ASN1_SIMPLE(SM2CiphertextValue, xCoordinate, ASN1_INTEGER),
ASN1_SIMPLE(SM2CiphertextValue, yCoordinate, ASN1_INTEGER),
ASN1_SIMPLE(SM2CiphertextValue, xCoordinate, BIGNUM),
ASN1_SIMPLE(SM2CiphertextValue, yCoordinate, BIGNUM),
ASN1_SIMPLE(SM2CiphertextValue, hash, ASN1_OCTET_STRING),
ASN1_SIMPLE(SM2CiphertextValue, ciphertext, ASN1_OCTET_STRING),
} ASN1_SEQUENCE_END(SM2CiphertextValue)
IMPLEMENT_ASN1_FUNCTIONS(SM2CiphertextValue)
IMPLEMENT_ASN1_DUP_FUNCTION(SM2CiphertextValue)
int i2d_SM2_CIPHERTEXT_VALUE(const EC_GROUP *group, const SM2_CIPHERTEXT_VALUE *c,
unsigned char **out)
{
int ret = 0;
SM2CiphertextValue *asn1 = NULL;
BIGNUM *x = NULL;
BIGNUM *y = NULL;
BN_CTX *bn_ctx = NULL;
asn1 = SM2CiphertextValue_new();
x = BN_new();
y = BN_new();
bn_ctx = BN_CTX_new();
if (!asn1 || !x || !y || !bn_ctx) {
ECerr(EC_F_I2D_SM2_CIPHERTEXT_VALUE, ERR_R_MALLOC_FAILURE);
goto end;
}
if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) == NID_X9_62_prime_field) {
if (!EC_POINT_get_affine_coordinates_GFp(group, c->ephem_point, x, y, bn_ctx)) {
ECerr(EC_F_I2D_SM2_CIPHERTEXT_VALUE, ERR_R_EC_LIB);
goto end;
}
} else {
if (!EC_POINT_get_affine_coordinates_GF2m(group, c->ephem_point, x, y, bn_ctx)) {
ECerr(EC_F_I2D_SM2_CIPHERTEXT_VALUE, ERR_R_EC_LIB);
goto end;
}
}
if (!BN_to_ASN1_INTEGER(x, asn1->xCoordinate)) {
ECerr(EC_F_I2D_SM2_CIPHERTEXT_VALUE, ERR_R_BN_LIB);
goto end;
}
if (!BN_to_ASN1_INTEGER(y, asn1->yCoordinate)) {
ECerr(EC_F_I2D_SM2_CIPHERTEXT_VALUE, ERR_R_BN_LIB);
goto end;
}
if (!ASN1_OCTET_STRING_set(asn1->hash, c->mactag, c->mactag_size)) {
ECerr(EC_F_I2D_SM2_CIPHERTEXT_VALUE, ERR_R_ASN1_LIB);
goto end;
}
if (!ASN1_OCTET_STRING_set(asn1->ciphertext, c->ciphertext, c->ciphertext_size)) {
ECerr(EC_F_I2D_SM2_CIPHERTEXT_VALUE, ERR_R_ASN1_LIB);
goto end;
}
ret = 1;
end:
SM2CiphertextValue_free(asn1);
BN_free(x);
BN_free(y);
BN_CTX_free(bn_ctx);
return ret;
}
SM2_CIPHERTEXT_VALUE *d2i_SM2_CIPHERTEXT_VALUE(const EC_GROUP *group,
SM2_CIPHERTEXT_VALUE **c, const unsigned char **in, long len)
{
int e = 1;
SM2_CIPHERTEXT_VALUE *ret = NULL;
SM2CiphertextValue *asn1 = NULL;
BIGNUM *x = NULL;
BIGNUM *y = NULL;
BN_CTX *bn_ctx = NULL;
if (!(asn1 = d2i_SM2CiphertextValue(NULL, in, len))) {
ECerr(EC_F_D2I_SM2_CIPHERTEXT_VALUE, ERR_R_MALLOC_FAILURE);
goto end;
}
if (!(x = ASN1_INTEGER_to_BN(asn1->xCoordinate, NULL))) {
ECerr(EC_F_D2I_SM2_CIPHERTEXT_VALUE, ERR_R_BN_LIB);
goto end;
}
if (!(y = ASN1_INTEGER_to_BN(asn1->yCoordinate, NULL))) {
ECerr(EC_F_D2I_SM2_CIPHERTEXT_VALUE, ERR_R_BN_LIB);
goto end;
}
ret = SM2_CIPHERTEXT_VALUE_new(group);
bn_ctx = BN_CTX_new();
if (!ret || !bn_ctx) {
ECerr(EC_F_D2I_SM2_CIPHERTEXT_VALUE, ERR_R_MALLOC_FAILURE);
goto end;
}
/* (x, y) */
if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) == NID_X9_62_prime_field) {
if (!EC_POINT_set_affine_coordinates_GFp(group, ret->ephem_point, x, y, bn_ctx)) {
ECerr(EC_F_D2I_SM2_CIPHERTEXT_VALUE, ERR_R_EC_LIB);
goto end;
}
} else {
if (!EC_POINT_set_affine_coordinates_GF2m(group, ret->ephem_point, x, y, bn_ctx)) {
ECerr(EC_F_D2I_SM2_CIPHERTEXT_VALUE, ERR_R_EC_LIB);
goto end;
}
}
/* hash */
ret->mactag_size = asn1->hash->length;
memcpy(ret->mactag, asn1->hash->data, asn1->hash->length);
/* ciphertext */
ret->ciphertext_size = asn1->ciphertext->length;
if (!(ret->ciphertext = OPENSSL_malloc(ret->ciphertext_size))) {
ECerr(EC_F_D2I_SM2_CIPHERTEXT_VALUE, ERR_R_MALLOC_FAILURE);
goto end;
}
memcpy(ret->ciphertext, asn1->ciphertext->data, asn1->ciphertext->length);
e = 0;
end:
SM2CiphertextValue_free(asn1);
BN_free(x);
BN_free(y);
BN_CTX_free(bn_ctx);
if (e && ret) {
SM2_CIPHERTEXT_VALUE_free(ret);
ret = NULL;
}
return ret;
}

866
crypto/sm2/sm2_enc.c
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 2015 - 2016 The GmSSL Project. All rights reserved.
* Copyright (c) 2015 - 2017 The GmSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@@ -46,551 +46,280 @@
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <openssl/bn.h>
#include <openssl/ec.h>
#include <openssl/sm2.h>
#include <openssl/rand.h>
#include <openssl/kdf.h>
#include "internal/o_str.h"
#include "sm2_lcl.h"
SM2_ENC_PARAMS *SM2_ENC_PARAMS_new(void)
SM2CiphertextValue *SM2_do_encrypt(const EVP_MD *md,
const unsigned char *in, size_t inlen, EC_KEY *ec_key)
{
SM2_ENC_PARAMS *ret = NULL;
if (!(ret = OPENSSL_zalloc(sizeof(*ret)))) {
ECerr(EC_F_SM2_ENC_PARAMS_NEW, ERR_R_MALLOC_FAILURE);
return NULL;
}
SM2_ENC_PARAMS_init_with_recommended(ret);
return ret;
}
SM2_ENC_PARAMS *SM2_ENC_PARAMS_dup(const SM2_ENC_PARAMS *param)
{
SM2_ENC_PARAMS *ret = NULL;
if (!param) {
ECerr(EC_F_SM2_ENC_PARAMS_DUP, EC_R_NULL_ARGUMENT);
return NULL;
}
if (!(ret = OPENSSL_memdup(param, sizeof(*param)))) {
ECerr(EC_F_SM2_ENC_PARAMS_DUP, ERR_R_MALLOC_FAILURE);
return NULL;
}
return ret;
}
int SM2_ENC_PARAMS_init_with_recommended(SM2_ENC_PARAMS *params)
{
if (!params) {
ECerr(EC_F_SM2_ENC_PARAMS_INIT_WITH_RECOMMENDED,
EC_R_NULL_ARGUMENT);
return 0;
}
params->kdf_md = EVP_sm3();
params->mac_md = EVP_sm3();
params->point_form = POINT_CONVERSION_UNCOMPRESSED;
return 1;
}
void SM2_ENC_PARAMS_free(SM2_ENC_PARAMS *param)
{
OPENSSL_free(param);
}
int SM2_CIPHERTEXT_VALUE_size(const EC_GROUP *group,
const SM2_ENC_PARAMS *params, size_t mlen)
{
int ret = 0;
EC_KEY *ec_key = NULL;
size_t len = 0;
if (!(ec_key = EC_KEY_new())) {
ECerr(EC_F_SM2_CIPHERTEXT_VALUE_SIZE, ERR_R_EC_LIB);
goto end;
}
if (!EC_KEY_set_group(ec_key, group)) {
ECerr(EC_F_SM2_CIPHERTEXT_VALUE_SIZE, ERR_R_EC_LIB);
goto end;
}
if (!EC_KEY_generate_key(ec_key)) {
ECerr(EC_F_SM2_CIPHERTEXT_VALUE_SIZE, ERR_R_EC_LIB);
goto end;
}
len += EC_POINT_point2oct(group, EC_KEY_get0_public_key(ec_key),
params->point_form, NULL, 0, NULL);
len += mlen;
len += EVP_MD_size(params->mac_md);
ret = (int)len;
end:
EC_KEY_free(ec_key);
return ret;
}
SM2_CIPHERTEXT_VALUE *SM2_CIPHERTEXT_VALUE_new(const EC_GROUP *group)
{
SM2_CIPHERTEXT_VALUE *cv;
if (!(cv = OPENSSL_malloc(sizeof(*cv)))) {
ECerr(EC_F_SM2_CIPHERTEXT_VALUE_NEW, EC_R_MALLOC_FAILED);
return NULL;
}
memset(cv, 0, sizeof(*cv));
if (!(cv->ephem_point = EC_POINT_new(group))) {
ECerr(EC_F_SM2_CIPHERTEXT_VALUE_NEW, EC_R_POINT_NEW_FAILED);
OPENSSL_free(cv);
return NULL;
}
return cv;
}
void SM2_CIPHERTEXT_VALUE_free(SM2_CIPHERTEXT_VALUE *cv)
{
if (cv->ephem_point) EC_POINT_free(cv->ephem_point);
if (cv->ciphertext) OPENSSL_free(cv->ciphertext);
memset(cv, 0, sizeof(*cv));
OPENSSL_free(cv);
}
int SM2_CIPHERTEXT_VALUE_encode(const SM2_CIPHERTEXT_VALUE *cv,
const EC_GROUP *ec_group, const SM2_ENC_PARAMS *params,
unsigned char *buf, size_t *buflen)
{
int ret = 0;
BN_CTX *bn_ctx = BN_CTX_new();
size_t ptlen, cvlen;
OPENSSL_assert(cv);
OPENSSL_assert(ec_group);
OPENSSL_assert(buf);
OPENSSL_assert(cv->ephem_point);
if (!bn_ctx) {
ECerr(EC_F_SM2_CIPHERTEXT_VALUE_ENCODE, ERR_R_BN_LIB);
return 0;
}
if (!(ptlen = EC_POINT_point2oct(ec_group, cv->ephem_point,
params->point_form, NULL, 0, bn_ctx))) {
ECerr(EC_F_SM2_CIPHERTEXT_VALUE_ENCODE, EC_R_POINT2OCT_FAILED);
goto end;
}
cvlen = ptlen + cv->ciphertext_size + cv->mactag_size;
if (!buf) {
*buflen = cvlen;
ret = 1;
goto end;
} else if (*buflen < cvlen) {
ECerr(EC_F_SM2_CIPHERTEXT_VALUE_ENCODE, EC_R_BUFFER_TOO_SMALL);
goto end;
}
if (!(ptlen = EC_POINT_point2oct(ec_group, cv->ephem_point,
params->point_form, buf, *buflen, bn_ctx))) {
ECerr(EC_F_SM2_CIPHERTEXT_VALUE_ENCODE, EC_R_POINT2OCT_FAILED);
goto end;
}
buf += ptlen;
memcpy(buf, cv->ciphertext, cv->ciphertext_size);
buf += cv->ciphertext_size;
if (cv->mactag_size > 0) {
memcpy(buf, cv->mactag, cv->mactag_size);
}
*buflen = cvlen;
ret = 1;
end:
if (bn_ctx) BN_CTX_free(bn_ctx);
return ret;
}
SM2_CIPHERTEXT_VALUE *SM2_CIPHERTEXT_VALUE_decode(
const EC_GROUP *ec_group, const SM2_ENC_PARAMS *params,
const unsigned char *buf, size_t buflen)
{
int ok = 0;
SM2_CIPHERTEXT_VALUE *ret = NULL;
BN_CTX *bn_ctx = BN_CTX_new();
int ptlen;
int fixlen;
if (!bn_ctx) {
ECerr(EC_F_SM2_CIPHERTEXT_VALUE_DECODE, ERR_R_BN_LIB);
return NULL;
}
if (!(fixlen = SM2_CIPHERTEXT_VALUE_size(ec_group, params, 0))) {
ECerr(EC_F_SM2_CIPHERTEXT_VALUE_DECODE, EC_R_GET_CIPHERTEXT_SIZE_FAILED);
goto end;
}
if (buflen <= (size_t)fixlen) {
ECerr(EC_F_SM2_CIPHERTEXT_VALUE_DECODE, EC_R_BUFFER_TOO_SMALL);
goto end;
}
if (!(ret = OPENSSL_malloc(sizeof(SM2_CIPHERTEXT_VALUE)))) {
ECerr(EC_F_SM2_CIPHERTEXT_VALUE_DECODE, EC_R_MALLOC_FAILED);
goto end;
}
ret->ephem_point = EC_POINT_new(ec_group);
ret->ciphertext_size = buflen - fixlen;
ret->ciphertext = OPENSSL_malloc(ret->ciphertext_size);
if (!ret->ephem_point || !ret->ciphertext) {
ECerr(EC_F_SM2_CIPHERTEXT_VALUE_DECODE, EC_R_INNOR_ERROR);
goto end;
}
#if 0
//FIXME
ptlen = fixlen - SM2_ENC_PARAMS_mactag_size(params);
#endif
ptlen = (int)fixlen; //FIXME
if (!EC_POINT_oct2point(ec_group, ret->ephem_point, buf, ptlen, bn_ctx)) {
ECerr(EC_F_SM2_CIPHERTEXT_VALUE_DECODE, EC_R_OCT2POINT_FAILED);
goto end;
}
memcpy(ret->ciphertext, buf + ptlen, ret->ciphertext_size);
//FIXME
//ret->mactag_size = SM2_ENC_PARAMS_mactag_size(params);
if (ret->mactag_size > 0) {
memcpy(ret->mactag, buf + buflen - ret->mactag_size, ret->mactag_size);
}
ok = 1;
end:
if (!ok && ret) {
SM2_CIPHERTEXT_VALUE_free(ret);
ret = NULL;
}
if (bn_ctx) BN_CTX_free(bn_ctx);
return ret;
}
int SM2_CIPHERTEXT_VALUE_print(BIO *out, const EC_GROUP *ec_group,
const SM2_CIPHERTEXT_VALUE *cv, int indent, unsigned long flags)
{
int ret = 0;
char *hex = NULL;
BN_CTX *ctx = BN_CTX_new();
size_t i;
if (!ctx) {
goto end;
}
if (!(hex = EC_POINT_point2hex(ec_group, cv->ephem_point,
POINT_CONVERSION_UNCOMPRESSED, ctx))) {
goto end;
}
BIO_printf(out, "SM2_CIPHERTEXT_VALUE.ephem_point: %s\n", hex);
BIO_printf(out, "SM2_CIPHERTEXT_VALUE.ciphertext : ");
for (i = 0; i < cv->ciphertext_size; i++) {
BIO_printf(out, "%02X", cv->ciphertext[i]);
}
BIO_printf(out, "\n");
BIO_printf(out, "SM2_CIPHERTEXT_VALUE.mactag :");
for (i = 0; i < cv->mactag_size; i++) {
BIO_printf(out, "%02X", cv->mactag[i]);
}
BIO_printf(out, "\n");
ret = 1;
end:
OPENSSL_free(hex);
BN_CTX_free(ctx);
return 0;
}
int SM2_encrypt(const SM2_ENC_PARAMS *params,
const unsigned char *in, size_t inlen,
unsigned char *out, size_t *outlen,
EC_KEY *ec_key)
{
int ret = 0;
const EC_GROUP *ec_group = EC_KEY_get0_group(ec_key);
SM2_CIPHERTEXT_VALUE *cv = NULL;
int len;
if (!(len = SM2_CIPHERTEXT_VALUE_size(ec_group, params, inlen))) {
ECerr(EC_F_SM2_ENCRYPT, EC_R_ERROR);
goto end;
}
if (!out) {
*outlen = (size_t)len;
return 1;
} else if (*outlen < (size_t)len) {
ECerr(EC_F_SM2_ENCRYPT, EC_R_BUFFER_TOO_SMALL);
return 0;
}
if (!(cv = SM2_do_encrypt(params, in, inlen, ec_key))) {
ECerr(EC_F_SM2_ENCRYPT, EC_R_ENCRYPT_FAILED);
goto end;
}
if (!SM2_CIPHERTEXT_VALUE_encode(cv, ec_group, params, out, outlen)) {
ECerr(EC_F_SM2_ENCRYPT, EC_R_CIPHERTEXT_ENCODE_FAILED);
goto end;
}
ret = 1;
end:
if (cv) SM2_CIPHERTEXT_VALUE_free(cv);
return ret;
}
SM2_CIPHERTEXT_VALUE *SM2_do_encrypt(const SM2_ENC_PARAMS *params,
const unsigned char *in, size_t inlen,
EC_KEY *ec_key)
{
int ok = 0;
SM2_CIPHERTEXT_VALUE *cv = NULL;
const EC_GROUP *ec_group = EC_KEY_get0_group(ec_key);
const EC_POINT *pub_key = EC_KEY_get0_public_key(ec_key);
KDF_FUNC kdf = KDF_get_x9_63(params->kdf_md);
EC_POINT *point = NULL;
SM2CiphertextValue *ret = NULL;
SM2CiphertextValue *cv = NULL;
const EC_GROUP *group;
const EC_POINT *pub_key;
KDF_FUNC kdf;
EC_POINT *ephem_point = NULL;
EC_POINT *share_point = NULL;
BIGNUM *n = NULL;
BIGNUM *h = NULL;
BIGNUM *k = NULL;
BN_CTX *bn_ctx = NULL;
EVP_MD_CTX *md_ctx = NULL;
unsigned char buf[(OPENSSL_ECC_MAX_FIELD_BITS + 7)/4 + 1];
int nbytes;
unsigned char dgst[EVP_MAX_MD_SIZE];
unsigned int dgstlen;
int mactag_size;
size_t len;
size_t i;
unsigned int hashlen;
if (!ec_group || !pub_key) {
ECerr(EC_F_SM2_DO_ENCRYPT, EC_R_INVALID_EC_KEY);
goto end;
/* check arguments */
if (!md || !in || !ec_key) {
SM2err(SM2_F_SM2_DO_ENCRYPT, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
if (!kdf) {
ECerr(EC_F_SM2_DO_ENCRYPT, EC_R_GET_KDF_FAILED);
if (inlen < SM2_MIN_PLAINTEXT_LENGTH || inlen > SM2_MAX_PLAINTEXT_LENGTH) {
SM2err(SM2_F_SM2_DO_ENCRYPT, SM2_R_INVALID_PLAINTEXT_LENGTH);
return 0;
}
if (!(kdf = KDF_get_x9_63(md))) {
SM2err(SM2_F_SM2_DO_ENCRYPT, SM2_R_INVALID_DIGEST_ALGOR);
return 0;
}
if (!(group = EC_KEY_get0_group(ec_key))
|| !(pub_key = EC_KEY_get0_public_key(ec_key))) {
SM2err(SM2_F_SM2_DO_ENCRYPT, SM2_R_INVALID_EC_KEY);
return 0;
}
/* malloc */
if (!(cv = SM2CiphertextValue_new())
|| !(ephem_point = EC_POINT_new(group))
|| !(share_point = EC_POINT_new(group))
|| !(n = BN_new())
|| !(h = BN_new())
|| !(k = BN_new())
|| !(bn_ctx = BN_CTX_new())
|| !(md_ctx = EVP_MD_CTX_new())) {
SM2err(SM2_F_SM2_DO_ENCRYPT, ERR_R_MALLOC_FAILURE);
goto end;
}
/* init ciphertext_value */
if (!(cv = OPENSSL_malloc(sizeof(SM2_CIPHERTEXT_VALUE)))) {
ECerr(EC_F_SM2_DO_ENCRYPT, EC_R_MALLOC_FAILED);
goto end;
}
memset(cv, 0, sizeof(*cv));
cv->ephem_point = EC_POINT_new(ec_group);
cv->ciphertext = OPENSSL_malloc(inlen);
cv->ciphertext_size = inlen;
if (!cv->ephem_point || !cv->ciphertext) {
ECerr(EC_F_SM2_DO_ENCRYPT, EC_R_ERROR);
goto end;
}
point = EC_POINT_new(ec_group);
n = BN_new();
h = BN_new();
k = BN_new();
bn_ctx = BN_CTX_new();
md_ctx = EVP_MD_CTX_create();
if (!point || !n || !h || !k || !bn_ctx || !md_ctx) {
ECerr(EC_F_SM2_DO_ENCRYPT, EC_R_ERROR);
if (!ASN1_OCTET_STRING_set(cv->ciphertext, NULL, (int)inlen)
|| !ASN1_OCTET_STRING_set(cv->hash, NULL, EVP_MD_size(md))) {
SM2err(SM2_F_SM2_DO_ENCRYPT, ERR_R_ASN1_LIB);
goto end;
}
/* init ec domain parameters */
if (!EC_GROUP_get_order(ec_group, n, bn_ctx)) {
if (!EC_GROUP_get_order(group, n, bn_ctx)) {
ECerr(EC_F_SM2_DO_ENCRYPT, EC_R_ERROR);
goto end;
}
if (!EC_GROUP_get_cofactor(ec_group, h, bn_ctx)) {
if (!EC_GROUP_get_cofactor(group, h, bn_ctx)) {
ECerr(EC_F_SM2_DO_ENCRYPT, EC_R_ERROR);
goto end;
}
nbytes = (EC_GROUP_get_degree(ec_group) + 7) / 8;
nbytes = (EC_GROUP_get_degree(group) + 7) / 8;
/* check [h]P_B != O */
if (!EC_POINT_mul(group, share_point, NULL, pub_key, h, bn_ctx)) {
SM2err(SM2_F_SM2_DO_ENCRYPT, ERR_R_EC_LIB);
goto end;
}
if (EC_POINT_is_at_infinity(group, share_point)) {
SM2err(SM2_F_SM2_DO_ENCRYPT, SM2_R_INVALID_PUBLIC_KEY);
goto end;
}
do
{
/* A1: rand k in [1, n-1] */
size_t size;
/* rand k in [1, n-1] */
do {
BN_rand_range(k, n);
} while (BN_is_zero(k));
/* A2: C1 = [k]G = (x1, y1) */
if (!EC_POINT_mul(ec_group, cv->ephem_point, k, NULL, NULL, bn_ctx)) {
ECerr(EC_F_SM2_DO_ENCRYPT, EC_R_ERROR);
/* compute ephem_point [k]G = (x1, y1) */
if (!EC_POINT_mul(group, ephem_point, k, NULL, NULL, bn_ctx)) {
SM2err(SM2_F_SM2_DO_ENCRYPT, ERR_R_EC_LIB);
goto end;
}
/* A3: check [h]P_B != O */
if (!EC_POINT_mul(ec_group, point, NULL, pub_key, h, bn_ctx)) {
ECerr(EC_F_SM2_DO_ENCRYPT, EC_R_ERROR);
goto end;
}
if (EC_POINT_is_at_infinity(ec_group, point)) {
ECerr(EC_F_SM2_DO_ENCRYPT, EC_R_ERROR);
/* compute ECDH share_point [k]P_B = (x2, y2) */
if (!EC_POINT_mul(group, share_point, NULL, pub_key, k, bn_ctx)) {
SM2err(SM2_F_SM2_DO_ENCRYPT, ERR_R_EC_LIB);
goto end;
}
/* A4: compute ECDH [k]P_B = (x2, y2) */
if (!EC_POINT_mul(ec_group, point, NULL, pub_key, k, bn_ctx)) {
ECerr(EC_F_SM2_DO_ENCRYPT, EC_R_ERROR);
goto end;
}
if (!(len = EC_POINT_point2oct(ec_group, point,
/* compute t = KDF(x2 || y2, klen) */
if (!(len = EC_POINT_point2oct(group, share_point,
POINT_CONVERSION_UNCOMPRESSED, buf, sizeof(buf), bn_ctx))) {
ECerr(EC_F_SM2_DO_ENCRYPT, EC_R_ERROR);
SM2err(SM2_F_SM2_DO_ENCRYPT, ERR_R_EC_LIB);
goto end;
}
OPENSSL_assert(len == nbytes * 2 + 1);
/* A5: t = KDF(x2 || y2, klen) */
kdf(buf + 1, len - 1, cv->ciphertext, &cv->ciphertext_size);
for (i = 0; i < cv->ciphertext_size; i++) {
if (cv->ciphertext[i]) {
break;
}
}
if (i == cv->ciphertext_size) {
continue;
size = cv->ciphertext->length;
kdf(buf + 1, len - 1, cv->ciphertext->data, &size);
if (size != inlen) {
SM2err(SM2_F_SM2_DO_ENCRYPT, SM2_R_KDF_FAILURE);
goto end;
}
break;
/* ASN1_OCTET_STRING_is_zero in asn1.h and a_octet.c */
} while (ASN1_OCTET_STRING_is_zero(cv->ciphertext));
} while (1);
/* set x/yCoordinates as (x1, y1) */
if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) == NID_X9_62_prime_field) {
if (!EC_POINT_get_affine_coordinates_GFp(group, ephem_point,
cv->xCoordinate, cv->yCoordinate, bn_ctx)) {
SM2err(SM2_F_SM2_DO_ENCRYPT, ERR_R_EC_LIB);
goto end;
}
} else {
if (!EC_POINT_get_affine_coordinates_GF2m(group, ephem_point,
cv->xCoordinate, cv->yCoordinate, bn_ctx)) {
SM2err(SM2_F_SM2_DO_ENCRYPT, ERR_R_EC_LIB);
goto end;
}
}
/* A6: C2 = M xor t */
/* ciphertext = t xor in */
for (i = 0; i < inlen; i++) {
cv->ciphertext[i] ^= in[i];
cv->ciphertext->data[i] ^= in[i];
}
mactag_size = EVP_MD_size(params->mac_md);
if (mactag_size) {
/* A7: C3 = Hash(x2 || M || y2) */
if (!EVP_DigestInit_ex(md_ctx, params->mac_md, NULL)) {
ECerr(EC_F_SM2_DO_ENCRYPT, EC_R_ERROR);
goto end;
}
if (!EVP_DigestUpdate(md_ctx, buf + 1, nbytes)) {
ECerr(EC_F_SM2_DO_ENCRYPT, EC_R_ERROR);
goto end;
}
if (!EVP_DigestUpdate(md_ctx, in, inlen)) {
ECerr(EC_F_SM2_DO_ENCRYPT, EC_R_ERROR);
goto end;
}
if (!EVP_DigestUpdate(md_ctx, buf + 1 + nbytes, nbytes)) {
ECerr(EC_F_SM2_DO_ENCRYPT, EC_R_ERROR);
goto end;
}
if (!EVP_DigestFinal_ex(md_ctx, dgst, &dgstlen)) {
ECerr(EC_F_SM2_DO_ENCRYPT, EC_R_ERROR);
goto end;
}
/* GmSSL specific: reduce mactag size */
if (mactag_size > dgstlen) {
ECerr(EC_F_SM2_DO_ENCRYPT, EC_R_ERROR);
goto end;
}
cv->mactag_size = mactag_size;
memcpy(cv->mactag, dgst, cv->mactag_size);
}
ok = 1;
end:
if (!ok && cv) {
SM2_CIPHERTEXT_VALUE_free(cv);
cv = NULL;
}
if (point) EC_POINT_free(point);
if (n) BN_free(n);
if (h) BN_free(h);
if (k) BN_free(k);
if (bn_ctx) BN_CTX_free(bn_ctx);
if (md_ctx) EVP_MD_CTX_destroy(md_ctx);
return cv;
}
int SM2_decrypt(const SM2_ENC_PARAMS *params,
const unsigned char *in, size_t inlen,
unsigned char *out, size_t *outlen,
EC_KEY *ec_key)
{
int ret = 0;
const EC_GROUP *ec_group = EC_KEY_get0_group(ec_key);
SM2_CIPHERTEXT_VALUE *cv = NULL;
int len;
if (!(len = SM2_CIPHERTEXT_VALUE_size(ec_group, params, 0))) {
ECerr(EC_F_SM2_DECRYPT, EC_R_ERROR);
/* generate hash = Hash(x2 || M || y2) */
hashlen = cv->hash->length;
if (!EVP_DigestInit_ex(md_ctx, md, NULL)
|| !EVP_DigestUpdate(md_ctx, buf + 1, nbytes)
|| !EVP_DigestUpdate(md_ctx, in, inlen)
|| !EVP_DigestUpdate(md_ctx, buf + 1 + nbytes, nbytes)
|| !EVP_DigestFinal_ex(md_ctx, cv->hash->data, &hashlen)) {
SM2err(SM2_F_SM2_DO_ENCRYPT, ERR_R_EVP_LIB);
goto end;
}
if (inlen <= len) {
ECerr(EC_F_SM2_DECRYPT, EC_R_ERROR);
ret = cv;
cv = NULL;
end:
SM2CiphertextValue_free(cv);
EC_POINT_free(share_point);
EC_POINT_free(ephem_point);
BN_free(n);
BN_free(h);
BN_clear_free(k);
BN_CTX_free(bn_ctx);
EVP_MD_CTX_free(md_ctx);
return ret;
}
int SM2_encrypt(int type, const unsigned char *in, size_t inlen,
unsigned char *out, size_t *outlen, EC_KEY *ec_key)
{
int ret = 0;
SM2CiphertextValue *cv = NULL;
const EVP_MD *md;
int len;
if (!(md = EVP_get_digestbynid(type))) {
SM2err(SM2_F_SM2_ENCRYPT, SM2_R_INVALID_DIGEST_ALGOR);
return 0;
}
if (!(cv = SM2_do_encrypt(md, in, inlen, ec_key))) {
SM2err(SM2_F_SM2_ENCRYPT, SM2_R_ENCRYPT_FAILURE);
goto end;
}
if (!out) {
*outlen = inlen - len;
return 1;
} else if (*outlen < inlen - len) {
ECerr(EC_F_SM2_DECRYPT, EC_R_ERROR);
*outlen = i2d_SM2CiphertextValue(cv, NULL);
ret = 1;
} else if (*outlen < i2d_SM2CiphertextValue(cv, NULL)) {
SM2err(SM2_F_SM2_ENCRYPT, SM2_R_BUFFER_TOO_SMALL);
ret = 0;
} else {
len = i2d_SM2CiphertextValue(cv, &out);
*outlen = len;
ret = 1;
}
end:
SM2CiphertextValue_free(cv);
return ret;
}
int SM2_decrypt(int type, const unsigned char *in, size_t inlen,
unsigned char *out, size_t *outlen, EC_KEY *ec_key)
{
int ret = 0;
SM2CiphertextValue *cv = NULL;
const EVP_MD *md;
if (!in) {
SM2err(SM2_F_SM2_DECRYPT, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
if (!(cv = SM2_CIPHERTEXT_VALUE_decode(ec_group, params, in, inlen))) {
ECerr(EC_F_SM2_DECRYPT, EC_R_ERROR);
if (inlen <= 0 || inlen > INT_MAX) {
SM2err(SM2_F_SM2_DECRYPT, SM2_R_INVALID_INPUT_LENGTH);
return 0;
}
if (!out) {
*outlen = inlen;
return 1;
} else if (*outlen < inlen) {
SM2err(SM2_F_SM2_DECRYPT, SM2_R_BUFFER_TOO_SMALL);
return 0;
}
if (!(md = EVP_get_digestbynid(type))) {
SM2err(SM2_F_SM2_DECRYPT, SM2_R_INVALID_DIGEST_ALGOR);
return 0;
}
if (!(cv = d2i_SM2CiphertextValue(NULL, &in, (long)inlen))) {
SM2err(SM2_F_SM2_DECRYPT, SM2_R_INVALID_CIPHERTEXT);
return 0;
}
if (inlen != i2d_SM2CiphertextValue(cv, NULL)) {
SM2err(SM2_F_SM2_DECRYPT, SM2_R_INVALID_CIPHERTEXT);
goto end;
}
if (!SM2_do_decrypt(params, cv, out, outlen, ec_key)) {
ECerr(EC_F_SM2_DECRYPT, EC_R_ERROR);
if (!SM2_do_decrypt(md, cv, out, outlen, ec_key)) {
SM2err(SM2_F_SM2_DECRYPT, SM2_R_DECRYPT_FAILURE);
goto end;
}
ret = 1;
end:
if (cv) SM2_CIPHERTEXT_VALUE_free(cv);
SM2CiphertextValue_free(cv);
return ret;
}
int SM2_do_decrypt(const SM2_ENC_PARAMS *params,
const SM2_CIPHERTEXT_VALUE *cv,
unsigned char *out, size_t *outlen,
EC_KEY *ec_key)
int SM2_do_decrypt(const EVP_MD *md, const SM2CiphertextValue *cv,
unsigned char *out, size_t *outlen, EC_KEY *ec_key)
{
int ret = 0;
const EC_GROUP *ec_group = EC_KEY_get0_group(ec_key);
const BIGNUM *pri_key = EC_KEY_get0_private_key(ec_key);
KDF_FUNC kdf = KDF_get_x9_63(params->kdf_md);
const EC_GROUP *group;
const BIGNUM *pri_key;
KDF_FUNC kdf;
EC_POINT *point = NULL;
BIGNUM *n = NULL;
BIGNUM *h = NULL;
@@ -598,121 +327,136 @@ int SM2_do_decrypt(const SM2_ENC_PARAMS *params,
EVP_MD_CTX *md_ctx = NULL;
unsigned char buf[(OPENSSL_ECC_MAX_FIELD_BITS + 7)/4 + 1];
unsigned char mac[EVP_MAX_MD_SIZE];
unsigned int maclen;
int mactag_size;
int nbytes;
size_t size;
int i;
unsigned int maclen = sizeof(mac);
int nbytes, len, i;
if (!ec_group || !pri_key) {
ECerr(EC_F_SM2_DO_DECRYPT, EC_R_ERROR);
goto end;
/* check arguments */
if (!md || !cv || !outlen || !ec_key) {
SM2err(SM2_F_SM2_DO_DECRYPT, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
if (!kdf) {
ECerr(EC_F_SM2_DO_DECRYPT, EC_R_ERROR);
goto end;
if (!(kdf = KDF_get_x9_63(md))) {
SM2err(SM2_F_SM2_DO_DECRYPT, SM2_R_INVALID_DIGEST_ALGOR);
return 0;
}
if (!cv->xCoordinate || !cv->yCoordinate || !cv->hash || !cv->ciphertext) {
SM2err(SM2_F_SM2_DO_DECRYPT, SM2_R_INVALID_CIPHERTEXT);
return 0;
}
if (cv->hash->length != EVP_MD_size(md)) {
SM2err(SM2_F_SM2_DO_DECRYPT, SM2_R_INVALID_CIPHERTEXT);
return 0;
}
if (cv->ciphertext->length < SM2_MIN_PLAINTEXT_LENGTH
|| cv->ciphertext->length > SM2_MAX_PLAINTEXT_LENGTH) {
SM2err(SM2_F_SM2_DO_DECRYPT, SM2_R_INVALID_CIPHERTEXT);
return 0;
}
if (!(group = EC_KEY_get0_group(ec_key))
|| !(pri_key = EC_KEY_get0_private_key(ec_key))) {
SM2err(SM2_F_SM2_DO_DECRYPT, SM2_R_INVALID_EC_KEY);
return 0;
}
if (!out) {
*outlen = cv->ciphertext_size;
*outlen = cv->ciphertext->length;
return 1;
}
if (*outlen < cv->ciphertext_size) {
ECerr(EC_F_SM2_DO_DECRYPT, EC_R_ERROR);
goto end;
if (*outlen < cv->ciphertext->length) {
SM2err(SM2_F_SM2_DO_DECRYPT, SM2_R_BUFFER_TOO_SMALL);
return 0;
}
/* init vars */
point = EC_POINT_new(ec_group);
/* malloc */
point = EC_POINT_new(group);
n = BN_new();
h = BN_new();
bn_ctx = BN_CTX_new();
md_ctx = EVP_MD_CTX_create();
md_ctx = EVP_MD_CTX_new();
if (!point || !n || !h || !bn_ctx || !md_ctx) {
ECerr(EC_F_SM2_DO_DECRYPT, EC_R_ERROR);
SM2err(SM2_F_SM2_DO_DECRYPT, ERR_R_MALLOC_FAILURE);
goto end;
}
/* init ec domain parameters */
if (!EC_GROUP_get_order(ec_group, n, bn_ctx)) {
ECerr(EC_F_SM2_DO_DECRYPT, EC_R_ERROR);
goto end;
}
if (!EC_GROUP_get_cofactor(ec_group, h, bn_ctx)) {
ECerr(EC_F_SM2_DO_DECRYPT, EC_R_ERROR);
goto end;
}
nbytes = (EC_GROUP_get_degree(ec_group) + 7) / 8;
/* B2: check [h]C1 != O */
if (!EC_POINT_mul(ec_group, point, NULL, cv->ephem_point, h, bn_ctx)) {
ECerr(EC_F_SM2_DO_DECRYPT, EC_R_ERROR);
goto end;
}
if (EC_POINT_is_at_infinity(ec_group, point)) {
ECerr(EC_F_SM2_DO_DECRYPT, EC_R_ERROR);
if (!EC_GROUP_get_order(group, n, bn_ctx)) {
SM2err(SM2_F_SM2_DO_DECRYPT, ERR_R_EC_LIB);
goto end;
}
/* B3: compute ECDH [d]C1 = (x2, y2) */
if (!EC_POINT_mul(ec_group, point, NULL, cv->ephem_point, pri_key, bn_ctx)) {
ECerr(EC_F_SM2_DO_DECRYPT, EC_R_ERROR);
if (!EC_GROUP_get_cofactor(group, h, bn_ctx)) {
SM2err(SM2_F_SM2_DO_DECRYPT, ERR_R_EC_LIB);
goto end;
}
if (!(size = EC_POINT_point2oct(ec_group, point,
nbytes = (EC_GROUP_get_degree(group) + 7) / 8;
/* get x/yCoordinates as C1 = (x1, y1) */
if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) == NID_X9_62_prime_field) {
if (!EC_POINT_set_affine_coordinates_GFp(group, point,
cv->xCoordinate, cv->yCoordinate, bn_ctx)) {
SM2err(SM2_F_SM2_DO_DECRYPT, SM2_R_INVALID_CIPHERTEXT);
goto end;
}
} else {
if (!EC_POINT_set_affine_coordinates_GF2m(group, point,
cv->xCoordinate, cv->yCoordinate, bn_ctx)) {
SM2err(SM2_F_SM2_DO_DECRYPT, SM2_R_INVALID_CIPHERTEXT);
goto end;
}
}
/* check [h]C1 != O */
if (!EC_POINT_mul(group, point, NULL, point, h, bn_ctx)) {
SM2err(SM2_F_SM2_DO_DECRYPT, ERR_R_EC_LIB);
goto end;
}
if (EC_POINT_is_at_infinity(group, point)) {
SM2err(SM2_F_SM2_DO_DECRYPT, SM2_R_INVALID_CIPHERTEXT);
goto end;
}
/* compute ECDH [d]C1 = (x2, y2) */
if (!EC_POINT_mul(group, point, NULL, point, pri_key, bn_ctx)) {
SM2err(SM2_F_SM2_DO_DECRYPT, ERR_R_EC_LIB);
goto end;
}
if (!(len = EC_POINT_point2oct(group, point,
POINT_CONVERSION_UNCOMPRESSED, buf, sizeof(buf), bn_ctx))) {
ECerr(EC_F_SM2_DO_DECRYPT, EC_R_ERROR);
SM2err(SM2_F_SM2_DO_DECRYPT, ERR_R_EC_LIB);
goto end;
}
OPENSSL_assert(size == 1 + nbytes * 2);
/* B4: compute t = KDF(x2 || y2, clen) */
*outlen = cv->ciphertext_size; //FIXME: duplicated code
kdf(buf + 1, size - 1, out, outlen);
/* compute t = KDF(x2 || y2, clen) */
*outlen = cv->ciphertext->length;
kdf(buf + 1, len - 1, out, outlen);
/* B5: compute M = C2 xor t */
for (i = 0; i < cv->ciphertext_size; i++) {
out[i] ^= cv->ciphertext[i];
/* compute M = C2 xor t */
for (i = 0; i < cv->ciphertext->length; i++) {
out[i] ^= cv->ciphertext->data[i];
}
*outlen = cv->ciphertext_size;
mactag_size = EVP_MD_size(params->mac_md);
if (mactag_size) {
/* check hash == Hash(x2 || M || y2) */
if (!EVP_DigestInit_ex(md_ctx, md, NULL)
|| !EVP_DigestUpdate(md_ctx, buf + 1, nbytes)
|| !EVP_DigestUpdate(md_ctx, out, *outlen)
|| !EVP_DigestUpdate(md_ctx, buf + 1 + nbytes, nbytes)
|| !EVP_DigestFinal_ex(md_ctx, mac, &maclen)) {
SM2err(SM2_F_SM2_DO_DECRYPT, ERR_R_EVP_LIB);
goto end;
}
/* B6: check Hash(x2 || M || y2) == C3 */
if (!EVP_DigestInit_ex(md_ctx, params->mac_md, NULL)) {
ECerr(EC_F_SM2_DO_DECRYPT, EC_R_ERROR);
goto end;
}
if (!EVP_DigestUpdate(md_ctx, buf + 1, nbytes)) {
ECerr(EC_F_SM2_DO_DECRYPT, EC_R_ERROR);
goto end;
}
if (!EVP_DigestUpdate(md_ctx, out, *outlen)) {
ECerr(EC_F_SM2_DO_DECRYPT, EC_R_ERROR);
goto end;
}
if (!EVP_DigestUpdate(md_ctx, buf + 1 + nbytes, nbytes)) {
ECerr(EC_F_SM2_DO_DECRYPT, EC_R_ERROR);
goto end;
}
if (!EVP_DigestFinal_ex(md_ctx, mac, &maclen)) {
ECerr(EC_F_SM2_DO_DECRYPT, EC_R_ERROR);
goto end;
}
/* GmSSL specific */
if (mactag_size > (int)maclen) {
ECerr(EC_F_SM2_DO_DECRYPT, EC_R_ERROR);
goto end;
}
if (cv->mactag_size != mactag_size ||
OPENSSL_memcmp(mac, cv->mactag, cv->mactag_size)) {
ECerr(EC_F_SM2_DO_DECRYPT, EC_R_ERROR);
goto end;
}
if (OPENSSL_memcmp(cv->hash->data, mac, maclen) != 0) {
SM2err(SM2_F_SM2_DO_DECRYPT, SM2_R_INVALID_CIPHERTEXT);
goto end;
}
ret = 1;
@@ -721,24 +465,6 @@ end:
BN_free(n);
BN_free(h);
BN_CTX_free(bn_ctx);
EVP_MD_CTX_destroy(md_ctx);
EVP_MD_CTX_free(md_ctx);
return ret;
}
int SM2_encrypt_with_recommended(const unsigned char *in, size_t inlen,
unsigned char *out, size_t *outlen, EC_KEY *ec_key)
{
SM2_ENC_PARAMS params;
SM2_ENC_PARAMS_init_with_recommended(&params);
return SM2_encrypt(&params, in, inlen, out, outlen, ec_key);
}
int SM2_decrypt_with_recommended(const unsigned char *in, size_t inlen,
unsigned char *out, size_t *outlen,
EC_KEY *ec_key)
{
SM2_ENC_PARAMS params;
SM2_ENC_PARAMS_init_with_recommended(&params);
return SM2_decrypt(&params, in, inlen, out, outlen, ec_key);
}

65
crypto/sm2/sm2_err.c Normal file
View File

@@ -0,0 +1,65 @@
/*
* Generated by util/mkerr.pl DO NOT EDIT
* Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include <openssl/err.h>
#include <openssl/sm2.h>
/* BEGIN ERROR CODES */
#ifndef OPENSSL_NO_ERR
# define ERR_FUNC(func) ERR_PACK(ERR_LIB_SM2,func,0)
# define ERR_REASON(reason) ERR_PACK(ERR_LIB_SM2,0,reason)
static ERR_STRING_DATA SM2_str_functs[] = {
{ERR_FUNC(SM2_F_I2O_SM2CIPHERTEXTVALUE), "i2o_SM2CiphertextValue"},
{ERR_FUNC(SM2_F_O2I_SM2CIPHERTEXTVALUE), "o2i_SM2CiphertextValue"},
{ERR_FUNC(SM2_F_SM2_DECRYPT), "SM2_decrypt"},
{ERR_FUNC(SM2_F_SM2_DO_DECRYPT), "SM2_do_decrypt"},
{ERR_FUNC(SM2_F_SM2_DO_ENCRYPT), "SM2_do_encrypt"},
{ERR_FUNC(SM2_F_SM2_DO_SIGN), "SM2_do_sign"},
{ERR_FUNC(SM2_F_SM2_DO_VERIFY), "SM2_do_verify"},
{ERR_FUNC(SM2_F_SM2_ENCRYPT), "SM2_encrypt"},
{ERR_FUNC(SM2_F_SM2_SIGN_SETUP), "SM2_sign_setup"},
{0, NULL}
};
static ERR_STRING_DATA SM2_str_reasons[] = {
{ERR_REASON(SM2_R_BAD_SIGNATURE), "bad signature"},
{ERR_REASON(SM2_R_BUFFER_TOO_SMALL), "buffer too small"},
{ERR_REASON(SM2_R_DECRYPT_FAILURE), "decrypt failure"},
{ERR_REASON(SM2_R_ENCRYPT_FAILURE), "encrypt failure"},
{ERR_REASON(SM2_R_INVALID_CIPHERTEXT), "invalid ciphertext"},
{ERR_REASON(SM2_R_INVALID_DIGEST_ALGOR), "invalid digest algor"},
{ERR_REASON(SM2_R_INVALID_EC_KEY), "invalid ec key"},
{ERR_REASON(SM2_R_INVALID_INPUT_LENGTH), "invalid input length"},
{ERR_REASON(SM2_R_INVALID_PLAINTEXT_LENGTH), "invalid plaintext length"},
{ERR_REASON(SM2_R_INVALID_PUBLIC_KEY), "invalid public key"},
{ERR_REASON(SM2_R_KDF_FAILURE), "kdf failure"},
{ERR_REASON(SM2_R_MISSING_PARAMETERS), "missing parameters"},
{ERR_REASON(SM2_R_NEED_NEW_SETUP_VALUES), "need new setup values"},
{ERR_REASON(SM2_R_RANDOM_NUMBER_GENERATION_FAILED),
"random number generation failed"},
{0, NULL}
};
#endif
int ERR_load_SM2_strings(void)
{
#ifndef OPENSSL_NO_ERR
if (ERR_func_error_string(SM2_str_functs[0].error) == NULL) {
ERR_load_strings(0, SM2_str_functs);
ERR_load_strings(0, SM2_str_reasons);
}
#endif
return 1;
}

584
crypto/sm2/sm2_exch.c Normal file
View File

@@ -0,0 +1,584 @@
/* ====================================================================
* Copyright (c) 2015 - 2016 The GmSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the GmSSL Project.
* (http://gmssl.org/)"
*
* 4. The name "GmSSL Project" must not be used to endorse or promote
* products derived from this software without prior written
* permission. For written permission, please contact
* guanzhi1980@gmail.com.
*
* 5. Products derived from this software may not be called "GmSSL"
* nor may "GmSSL" appear in their names without prior written
* permission of the GmSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the GmSSL Project
* (http://gmssl.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE GmSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE GmSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
*/
#include <string.h>
#include <openssl/ec.h>
#include <openssl/sm2.h>
#include <openssl/kdf.h>
#include "sm2_lcl.h"
int SM2_KAP_CTX_init(SM2_KAP_CTX *ctx,
EC_KEY *ec_key, const char *id, size_t idlen,
EC_KEY *remote_pubkey, const char *rid, size_t ridlen,
int is_initiator, int do_checksum)
{
int ret = 0;
int w;
size_t len;
if (!ctx || !ec_key || !remote_pubkey) {
ECerr(EC_F_SM2_KAP_CTX_INIT, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
memset(ctx, 0, sizeof(*ctx));
ctx->id_dgst_md = EVP_sm3();
ctx->kdf_md = EVP_sm3();
ctx->checksum_md = EVP_sm3();
ctx->point_form = SM2_DEFAULT_POINT_CONVERSION_FORM;
if (!(ctx->kdf = KDF_get_x9_63(ctx->kdf_md))) {
ECerr(EC_F_SM2_KAP_CTX_INIT, EC_R_INVALID_KDF_MD);
goto end;
}
ctx->is_initiator = is_initiator;
ctx->do_checksum = do_checksum;
if (EC_GROUP_cmp(EC_KEY_get0_group(ec_key),
EC_KEY_get0_group(remote_pubkey), NULL) != 0) {
ECerr(EC_F_SM2_KAP_CTX_INIT, 0);
goto end;
}
len = ctx->id_dgstlen;
if (!SM2_compute_id_digest(ctx->id_dgst_md, id, idlen,
ctx->id_dgst, &len, ec_key)) {
ECerr(EC_F_SM2_KAP_CTX_INIT, 0);
goto end;
}
ctx->id_dgstlen = len;
if (!(ctx->ec_key = EC_KEY_dup(ec_key))) {
ECerr(EC_F_SM2_KAP_CTX_INIT, ERR_R_EC_LIB);
goto end;
}
len = ctx->remote_id_dgstlen;
if (!SM2_compute_id_digest(ctx->id_dgst_md, rid, ridlen,
ctx->remote_id_dgst, &len, remote_pubkey)) {
ECerr(EC_F_SM2_KAP_CTX_INIT, 0);
goto end;
}
ctx->remote_id_dgstlen = len;
if (!(ctx->remote_pubkey = EC_KEY_dup(remote_pubkey))) {
ECerr(EC_F_SM2_KAP_CTX_INIT, 0);
goto end;
}
ctx->group = EC_KEY_get0_group(ec_key);
ctx->bn_ctx = BN_CTX_new();
ctx->order = BN_new();
ctx->two_pow_w = BN_new();
ctx->t = BN_new();
if (!ctx->bn_ctx || !ctx->order || !ctx->two_pow_w || !ctx->t) {
ECerr(EC_F_SM2_KAP_CTX_INIT, ERR_R_BN_LIB);
goto end;
}
if (!EC_GROUP_get_order(EC_KEY_get0_group(ec_key), ctx->order, ctx->bn_ctx)) {
ECerr(EC_F_SM2_KAP_CTX_INIT, ERR_R_EC_LIB);
goto end;
}
w = (BN_num_bits(ctx->order) + 1)/2 - 1;
if (!BN_one(ctx->two_pow_w)) {
ECerr(EC_F_SM2_KAP_CTX_INIT, ERR_R_BN_LIB);
goto end;
}
if (!BN_lshift(ctx->two_pow_w, ctx->two_pow_w, w)) {
ECerr(EC_F_SM2_KAP_CTX_INIT, ERR_R_BN_LIB);
goto end;
}
if (!(ctx->point = EC_POINT_new(ctx->group))) {
ECerr(EC_F_SM2_KAP_CTX_INIT, ERR_R_EC_LIB);
goto end;
}
ret = 1;
end:
if (!ret) SM2_KAP_CTX_cleanup(ctx);
return ret;
}
void SM2_KAP_CTX_cleanup(SM2_KAP_CTX *ctx)
{
if (ctx) {
EC_KEY_free(ctx->ec_key);
EC_KEY_free(ctx->remote_pubkey);
BN_CTX_free(ctx->bn_ctx);
BN_free(ctx->two_pow_w);
BN_free(ctx->order);
EC_POINT_free(ctx->point);
BN_free(ctx->t);
memset(ctx, 0, sizeof(*ctx));
}
}
/* FIXME: ephem_point_len should be both input and output */
int SM2_KAP_prepare(SM2_KAP_CTX *ctx, unsigned char *ephem_point,
size_t *ephem_point_len)
{
int ret = 0;
const BIGNUM *prikey;
BIGNUM *h = NULL;
BIGNUM *r = NULL;
BIGNUM *x = NULL;
if (!(prikey = EC_KEY_get0_private_key(ctx->ec_key))) {
ECerr(EC_F_SM2_KAP_PREPARE, EC_R_SM2_KAP_NOT_INITED);
return 0;
}
h = BN_new();
r = BN_new();
x = BN_new();
if (!h || !r || !x) {
ECerr(EC_F_SM2_KAP_PREPARE, 0);
goto end;
}
/*
* r = rand(1, n)
* R = rG = (x, y)
*/
do {
if (!BN_rand_range(r, ctx->order)) {
ECerr(EC_F_SM2_KAP_PREPARE, EC_R_RANDOM_NUMBER_GENERATION_FAILED);
goto end;
}
} while (BN_is_zero(r));
if (!EC_POINT_mul(ctx->group, ctx->point, r, NULL, NULL, ctx->bn_ctx)) {
ECerr(EC_F_SM2_KAP_PREPARE, ERR_R_EC_LIB);
goto end;
}
if (EC_METHOD_get_field_type(EC_GROUP_method_of(ctx->group)) == NID_X9_62_prime_field) {
if (!EC_POINT_get_affine_coordinates_GFp(ctx->group, ctx->point, x, NULL, ctx->bn_ctx)) {
ECerr(EC_F_SM2_KAP_PREPARE, ERR_R_EC_LIB);
goto end;
}
} else {
if (!EC_POINT_get_affine_coordinates_GF2m(ctx->group, ctx->point, x, NULL, ctx->bn_ctx)) {
ECerr(EC_F_SM2_KAP_PREPARE, ERR_R_EC_LIB);
goto end;
}
}
/*
* w = ceil(keybits / 2) - 1
* x = 2^w + (x and (2^w - 1)) = 2^w + (x mod 2^w)
* t = (d + x * r) mod n
* t = (h * t) mod n
*/
if (!ctx->t) {
ECerr(EC_F_SM2_KAP_PREPARE, EC_R_SM2_KAP_NOT_INITED);
goto end;
}
if (!BN_nnmod(x, x, ctx->two_pow_w, ctx->bn_ctx)) {
ECerr(EC_F_SM2_KAP_PREPARE, ERR_R_BN_LIB);
goto end;
}
if (!BN_add(x, x, ctx->two_pow_w)) {
ECerr(EC_F_SM2_KAP_PREPARE, ERR_R_BN_LIB);
goto end;
}
if (!BN_mod_mul(ctx->t, x, r, ctx->order, ctx->bn_ctx)) {
ECerr(EC_F_SM2_KAP_PREPARE, ERR_R_BN_LIB);
goto end;
}
if (!BN_mod_add(ctx->t, ctx->t, prikey, ctx->order, ctx->bn_ctx)) {
ECerr(EC_F_SM2_KAP_PREPARE, ERR_R_BN_LIB);
goto end;
}
if (!EC_GROUP_get_cofactor(ctx->group, h, ctx->bn_ctx)) {
ECerr(EC_F_SM2_KAP_PREPARE, ERR_R_EC_LIB);
goto end;
}
if (!BN_mul(ctx->t, ctx->t, h, ctx->bn_ctx)) {
ECerr(EC_F_SM2_KAP_PREPARE, ERR_R_BN_LIB);
goto end;
}
/* encode R = (x, y) for output and local buffer */
// FIXME: ret is size_t and ret is the output length
ret = EC_POINT_point2oct(ctx->group, ctx->point, ctx->point_form,
ephem_point, *ephem_point_len, ctx->bn_ctx);
memcpy(ctx->pt_buf, ephem_point, ret);
*ephem_point_len = ret;
ret = 1;
end:
if (h) BN_free(h);
if (r) BN_free(r);
if (x) BN_free(x);
return ret;
}
int SM2_KAP_compute_key(SM2_KAP_CTX *ctx, const unsigned char *remote_point,
size_t remote_point_len, unsigned char *key, size_t keylen,
unsigned char *checksum, size_t *checksumlen)
{
int ret = 0;
EVP_MD_CTX *md_ctx = NULL;
BIGNUM *x = NULL;
unsigned char share_pt_buf[1 + (OPENSSL_ECC_MAX_FIELD_BITS+7)/4 + EVP_MAX_MD_SIZE * 2 + 100];
unsigned char remote_pt_buf[1 + (OPENSSL_ECC_MAX_FIELD_BITS+7)/4 + 111];
unsigned char dgst[EVP_MAX_MD_SIZE];
unsigned int dgstlen;
unsigned int len, bnlen;
size_t klen = keylen;
md_ctx = EVP_MD_CTX_new();
x = BN_new();
if (!md_ctx || !x) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, 0);
goto end;
}
/*
* decode point R = (x, y), encode (x, y)
* x = 2^w + (x and (2^w - 1)) = 2^w + (x mod 2^w), w = ceil(keybits / 2) - 1
* U = ht * (P + x * R)
* check U != O
*/
if (!EC_POINT_oct2point(ctx->group, ctx->point,
remote_point, remote_point_len, ctx->bn_ctx)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, 0);
goto end;
}
if (!(len = EC_POINT_point2oct(ctx->group, ctx->point, POINT_CONVERSION_UNCOMPRESSED,
remote_pt_buf, sizeof(remote_pt_buf), ctx->bn_ctx))) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, 0);
goto end;
}
if (EC_METHOD_get_field_type(EC_GROUP_method_of(ctx->group)) == NID_X9_62_prime_field) {
if (!EC_POINT_get_affine_coordinates_GFp(ctx->group, ctx->point, x, NULL, ctx->bn_ctx)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EC_LIB);
goto end;
}
} else {
if (!EC_POINT_get_affine_coordinates_GF2m(ctx->group, ctx->point, x, NULL, ctx->bn_ctx)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EC_LIB);
goto end;
}
}
/* x = 2^w + (x and (2^w - 1)) = 2^w + (x mod 2^w) */
if (!BN_nnmod(x, x, ctx->two_pow_w, ctx->bn_ctx)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_BN_LIB);
goto end;
}
if (!BN_add(x, x, ctx->two_pow_w)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_BN_LIB);
goto end;
}
/*
if (!BN_mod_mul(x, x, ctx->t, ctx->order, ctx->bn_ctx)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_BN_LIB);
goto end;
}
*/
/* U = ht * (P + x * R), check U != O */
if (!EC_POINT_mul(ctx->group, ctx->point, NULL, ctx->point, x, ctx->bn_ctx)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EC_LIB);
goto end;
}
if (!EC_POINT_add(ctx->group, ctx->point, ctx->point,
EC_KEY_get0_public_key(ctx->remote_pubkey), ctx->bn_ctx)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EC_LIB);
goto end;
}
if (!EC_POINT_mul(ctx->group, ctx->point, NULL, ctx->point, ctx->t, ctx->bn_ctx)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EC_LIB);
goto end;
}
if (EC_POINT_is_at_infinity(ctx->group, ctx->point)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, 0);
goto end;
}
/* encode U, append with ZA, ZB */
if (!(len = EC_POINT_point2oct(ctx->group, ctx->point, POINT_CONVERSION_UNCOMPRESSED,
share_pt_buf, sizeof(share_pt_buf), ctx->bn_ctx))) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, 0);
goto end;
}
if (ctx->is_initiator) {
memcpy(share_pt_buf + len, ctx->id_dgst, ctx->id_dgstlen);
len += ctx->id_dgstlen;
memcpy(share_pt_buf + len, ctx->remote_id_dgst, ctx->remote_id_dgstlen);
len += ctx->remote_id_dgstlen;
} else {
memcpy(share_pt_buf + len, ctx->remote_id_dgst, ctx->remote_id_dgstlen);
len += ctx->remote_id_dgstlen;
memcpy(share_pt_buf + len, ctx->id_dgst, ctx->id_dgstlen);
len += ctx->id_dgstlen;
}
/* key = KDF(xu, yu, ZA, ZB) */
if (!ctx->kdf(share_pt_buf + 1, len - 1, key, &klen)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, 0);
goto end;
}
if (ctx->do_checksum) {
/* generate checksum S1 or SB start with 0x02
* S1 = SB = Hash(0x02, yu, Hash(xu, ZA, ZB, x1, y1, x2, y2))
*/
if (!EVP_DigestInit_ex(md_ctx, ctx->checksum_md, NULL)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EVP_LIB);
goto end;
}
bnlen = BN_num_bytes(ctx->order);
if (!EVP_DigestUpdate(md_ctx, share_pt_buf + 1, bnlen)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EVP_LIB);
goto end;
}
if (ctx->is_initiator) {
/* update ZA,ZB,x1,y1,x2,y2 */
if (!EVP_DigestUpdate(md_ctx, ctx->id_dgst, ctx->id_dgstlen)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EVP_LIB);
goto end;
}
if (!EVP_DigestUpdate(md_ctx, ctx->remote_id_dgst, ctx->remote_id_dgstlen)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EVP_LIB);
goto end;
}
if (!EVP_DigestUpdate(md_ctx, ctx->pt_buf + 1, bnlen * 2)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EVP_LIB);
goto end;
}
if (!EVP_DigestUpdate(md_ctx, remote_pt_buf + 1, bnlen * 2)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EVP_LIB);
goto end;
}
} else {
if (!EVP_DigestUpdate(md_ctx, ctx->remote_id_dgst, ctx->remote_id_dgstlen)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EVP_LIB);
goto end;
}
if (!EVP_DigestUpdate(md_ctx, ctx->id_dgst, ctx->id_dgstlen)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EVP_LIB);
goto end;
}
if (!EVP_DigestUpdate(md_ctx, remote_pt_buf + 1, bnlen * 2)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EVP_LIB);
goto end;
}
if (!EVP_DigestUpdate(md_ctx, ctx->pt_buf + 1, bnlen * 2)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EVP_LIB);
goto end;
}
}
if (!EVP_DigestFinal_ex(md_ctx, dgst, &dgstlen)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EVP_LIB);
goto end;
}
/* now dgst == H(xu,ZA,ZB,x1,y1,x2,y2)
*/
/* S1 = SB = Hash(0x02, yu, dgst) */
if (!EVP_DigestInit_ex(md_ctx, ctx->checksum_md, NULL)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EVP_LIB);
goto end;
}
if (!EVP_DigestUpdate(md_ctx, "\x02", 1)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EVP_LIB);
goto end;
}
if (!EVP_DigestUpdate(md_ctx, share_pt_buf + 1 + bnlen, bnlen)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EVP_LIB);
goto end;
}
if (!EVP_DigestUpdate(md_ctx, dgst, dgstlen)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EVP_LIB);
goto end;
}
/* output S1 to local buffer or SB to output */
if (ctx->is_initiator) {
if (!EVP_DigestFinal_ex(md_ctx, ctx->checksum, &len)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EVP_LIB);
goto end;
}
} else {
if (!EVP_DigestFinal_ex(md_ctx, checksum, &len)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EVP_LIB);
goto end;
}
*checksumlen = len;
}
/* generate checksum SA or S2 start with 0x03
* SA = S2 = Hash(0x03, yu, dgst)
*/
if (!EVP_DigestInit_ex(md_ctx, ctx->checksum_md, NULL)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EVP_LIB);
goto end;
}
if (!EVP_DigestUpdate(md_ctx, "\x03", 1)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EVP_LIB);
goto end;
}
if (!EVP_DigestUpdate(md_ctx, share_pt_buf + 1 + bnlen, bnlen)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EVP_LIB);
goto end;
}
if (!EVP_DigestUpdate(md_ctx, dgst, dgstlen)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EVP_LIB);
goto end;
}
if (ctx->is_initiator) {
if (!EVP_DigestFinal_ex(md_ctx, checksum, &len)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EVP_LIB);
goto end;
}
*checksumlen = len;
} else {
if (!EVP_DigestFinal_ex(md_ctx, ctx->checksum, &len)) {
ECerr(EC_F_SM2_KAP_COMPUTE_KEY, ERR_R_EVP_LIB);
goto end;
}
}
}
ret = 1;
end:
EVP_MD_CTX_free(md_ctx);
BN_free(x);
return ret;
}
int SM2_KAP_final_check(SM2_KAP_CTX *ctx, const unsigned char *checksum,
size_t checksumlen)
{
if (ctx->do_checksum) {
if (checksumlen != EVP_MD_size(ctx->checksum_md)) {
ECerr(EC_F_SM2_KAP_FINAL_CHECK, EC_R_INVALID_SM2_KAP_CHECKSUM_LENGTH);
return 0;
}
if (memcmp(ctx->checksum, checksum, checksumlen)) {
ECerr(EC_F_SM2_KAP_FINAL_CHECK, EC_R_INVALID_SM2_KAP_CHECKSUM_VALUE);
return 0;
}
}
return 1;
}
int SM2_compute_key(void *out, size_t outlen, const EC_POINT *pub_key,
const EC_KEY *ec_key, KDF_FUNC kdf_f)
{
return 0;
}

3
crypto/sm2/sm2_id.c
View File

@@ -59,6 +59,7 @@
#include <openssl/evp.h>
#include <openssl/rand.h>
#include <openssl/x509.h>
#include "sm2_lcl.h"
#define EC_MAX_NBYTES ((OPENSSL_ECC_MAX_FIELD_BITS + 7)/8)
@@ -211,7 +212,7 @@ int SM2_compute_id_digest(const EVP_MD *md, const char *id, size_t idlen,
}
#ifndef OPENSSL_NO_STRICT_GM
if (EVP_MD_size(md) != SM2_ID_DIGEST_LENGTH) {
if (EVP_MD_size(md) != SM2_DEFAULT_ID_DIGEST_LENGTH) {
ECerr(EC_F_SM2_COMPUTE_ID_DIGEST, EC_R_INVALID_DIGEST_ALGOR);
return 0;
}

2
crypto/sm2/sm2_kap.c
View File

@@ -52,6 +52,8 @@
#include <openssl/ec.h>
#include <openssl/sm2.h>
#include <openssl/kdf.h>
#include "sm2_lcl.h"
int SM2_KAP_CTX_init(SM2_KAP_CTX *ctx,
EC_KEY *ec_key, const char *id, size_t idlen,

131
crypto/sm2/sm2_kmeth.c
View File

@@ -58,138 +58,22 @@
#define SM2_KMETH_FLAGS 0
int SM2_ENC_PARAMS_set_type(SM2_ENC_PARAMS *params, int type)
{
const EVP_MD *md;
if (!(md = EVP_get_digestbynid(type))) {
ECerr(EC_F_SM2_ENC_PARAMS_SET_TYPE, EC_R_INVALID_DIGEST_TYPE);
return 0;
}
params->kdf_md = md;
params->mac_md = md;
params->point_form = SM2_DEFAULT_POINT_CONVERSION_FORM;
return 1;
}
SM2_CIPHERTEXT_VALUE *SM2_CIPHERTEXT_VALUE_new_from_ECIES_CIPHERTEXT_VALUE(
const ECIES_CIPHERTEXT_VALUE *in)
{
ECerr(EC_F_SM2_CIPHERTEXT_VALUE_NEW_FROM_ECIES_CIPHERTEXT_VALUE,
ERR_R_EC_LIB);
return NULL;
}
int SM2_CIPHERTEXT_VALUE_set_ECIES_CIPHERTEXT_VALUE(SM2_CIPHERTEXT_VALUE *sm2,
const ECIES_CIPHERTEXT_VALUE *in)
{
ECerr(EC_F_SM2_CIPHERTEXT_VALUE_SET_ECIES_CIPHERTEXT_VALUE,
ERR_R_EC_LIB);
return 0;
}
int SM2_CIPHERTEXT_VALUE_get_ECIES_CIPHERTEXT_VALUE(
const SM2_CIPHERTEXT_VALUE *sm2, ECIES_CIPHERTEXT_VALUE *out)
{
ECerr(EC_F_SM2_CIPHERTEXT_VALUE_GET_ECIES_CIPHERTEXT_VALUE,
ERR_R_EC_LIB);
return 0;
}
static int sm2_compute_key(unsigned char **Pout, size_t *poutlen,
const EC_POINT *pub_key, const EC_KEY *ec_key)
{
return 0;
}
static int sm2_encrypt(int type, const unsigned char *in, size_t inlen,
unsigned char *out, size_t *outlen, EC_KEY *ec_key)
{
SM2_ENC_PARAMS param;
if (!SM2_ENC_PARAMS_set_type(&param, type)) {
return 0;
}
return SM2_encrypt(&param, in, inlen, out, outlen, ec_key);
}
ECIES_CIPHERTEXT_VALUE *sm2_do_encrypt(int type, const unsigned char *in,
size_t inlen, EC_KEY *ec_key)
{
ECIES_CIPHERTEXT_VALUE *ret = NULL;
ECIES_CIPHERTEXT_VALUE *ecies = NULL;
SM2_CIPHERTEXT_VALUE *sm2 = NULL;
SM2_ENC_PARAMS param;
if (!(ecies = ECIES_CIPHERTEXT_VALUE_new())) {
goto end;
}
if (!SM2_ENC_PARAMS_set_type(&param, type)) {
goto end;
}
if (!(sm2 = SM2_do_encrypt(&param, in, inlen, ec_key))) {
goto end;
}
if (!SM2_CIPHERTEXT_VALUE_get_ECIES_CIPHERTEXT_VALUE(sm2, ecies)) {
goto end;
}
ret = ecies;
ecies = NULL;
end:
ECIES_CIPHERTEXT_VALUE_free(ecies);
SM2_CIPHERTEXT_VALUE_free(sm2);
return ret;
}
int sm2_decrypt(int type, const unsigned char *in, size_t inlen,
unsigned char *out, size_t *outlen, EC_KEY *ec_key)
{
SM2_ENC_PARAMS param;
if (!SM2_ENC_PARAMS_set_type(&param, type)) {
return 0;
}
return SM2_decrypt(&param, in, inlen, out, outlen, ec_key);
}
int sm2_do_decrypt(int type, const ECIES_CIPHERTEXT_VALUE *in,
unsigned char *out, size_t *outlen, EC_KEY *ec_key)
{
int ret = 0;
SM2_CIPHERTEXT_VALUE *sm2 = NULL;
SM2_ENC_PARAMS param;
if (!SM2_ENC_PARAMS_set_type(&param, type)) {
goto end;
}
// we might require type/param
if (!(sm2 = SM2_CIPHERTEXT_VALUE_new_from_ECIES_CIPHERTEXT_VALUE(in))) {
goto end;
}
if (!SM2_do_decrypt(&param, sm2, out, outlen, ec_key)) {
goto end;
}
ret = 1;
end:
SM2_CIPHERTEXT_VALUE_free(sm2);
return ret;
}
static const EC_KEY_METHOD gmssl_ec_key_method = {
"GmSSL EC_KEY method",
EC_KEY_METHOD_SM2,
0,0,0,0,0,0,
ossl_ec_key_gen,
sm2_compute_key,
SM2_sign,
NULL,
SM2_sign_ex,
SM2_sign_setup,
SM2_do_sign,
SM2_do_sign_ex,
SM2_verify,
SM2_do_verify,
sm2_encrypt,
sm2_do_encrypt,
sm2_decrypt,
sm2_do_decrypt,
SM2_encrypt,
NULL,
SM2_decrypt,
NULL,
};
const EC_KEY_METHOD *EC_KEY_GmSSL(void)
@@ -206,7 +90,6 @@ int EC_KEY_METHOD_type(const EC_KEY_METHOD *meth)
}
}
void EC_KEY_METHOD_set_encrypt(EC_KEY_METHOD *meth,
int (*encrypt)(int type,
const unsigned char *in,

104
crypto/sm2/sm2_lcl.h
View File

@@ -1,5 +1,107 @@
/*
* Copyright (c) 2015 - 2017 The GmSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the GmSSL Project.
* (http://gmssl.org/)"
*
* 4. The name "GmSSL Project" must not be used to endorse or promote
* products derived from this software without prior written
* permission. For written permission, please contact
* guanzhi1980@gmail.com.
*
* 5. Products derived from this software may not be called "GmSSL"
* nor may "GmSSL" appear in their names without prior written
* permission of the GmSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the GmSSL Project
* (http://gmssl.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE GmSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE GmSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#define EC_KEY_METHOD_SM2 0x02
#define SM2_DEFAULT_POINT_CONVERSION_FORM POINT_CONVERSION_UNCOMPRESSED
#define SM2_MAX_PKEY_DATA_LENGTH ((EC_MAX_NBYTES + 1) * 6)
int SM2_get_public_key_data(EC_KEY *ec_key, unsigned char *out, size_t *outlen);
int SM2_compute_message_digest(const EVP_MD *id_md, const EVP_MD *msg_md,
const unsigned char *msg, size_t msglen, const char *id, size_t idlen,
unsigned char *out, size_t *outlen,
EC_KEY *ec_key);
struct SM2CiphertextValue_st {
BIGNUM *xCoordinate;
BIGNUM *yCoordinate;
ASN1_OCTET_STRING *hash;
ASN1_OCTET_STRING *ciphertext;
};
struct sm2_kap_ctx_st {
const EVP_MD *id_dgst_md;
const EVP_MD *kdf_md;
const EVP_MD *checksum_md;
point_conversion_form_t point_form;
KDF_FUNC kdf;
int is_initiator;
int do_checksum;
EC_KEY *ec_key;
unsigned char id_dgst[EVP_MAX_MD_SIZE];
unsigned int id_dgstlen;
EC_KEY *remote_pubkey;
unsigned char remote_id_dgst[EVP_MAX_MD_SIZE];
unsigned int remote_id_dgstlen;
const EC_GROUP *group;
BN_CTX *bn_ctx;
BIGNUM *order;
BIGNUM *two_pow_w;
BIGNUM *t;
EC_POINT *point;
unsigned char pt_buf[1 + (OPENSSL_ECC_MAX_FIELD_BITS+7)/4];
unsigned char checksum[EVP_MAX_MD_SIZE];
};
int i2o_SM2CiphertextValue(const EC_GROUP *group, const SM2CiphertextValue *cv,
unsigned char **pout);
SM2CiphertextValue *o2i_SM2CiphertextValue(const EC_GROUP *group,
SM2CiphertextValue **cv, const unsigned char **pin, long len);

311
crypto/sm2/sm2_oct.c Normal file
View File

@@ -0,0 +1,311 @@
/* ====================================================================
* Copyright (c) 2007 - 2016 The GmSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the GmSSL Project.
* (http://gmssl.org/)"
*
* 4. The name "GmSSL Project" must not be used to endorse or promote
* products derived from this software without prior written
* permission. For written permission, please contact
* guanzhi1980@gmail.com.
*
* 5. Products derived from this software may not be called "GmSSL"
* nor may "GmSSL" appear in their names without prior written
* permission of the GmSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the GmSSL Project
* (http://gmssl.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE GmSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE GmSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*/
#include <string.h>
#include <openssl/ec.h>
#include <openssl/sm2.h>
#include <openssl/err.h>
#include <openssl/asn1.h>
#include <openssl/asn1t.h>
#include <openssl/objects.h>
#include <openssl/obj_mac.h>
#include "sm2_lcl.h"
int i2o_SM2CiphertextValue(const EC_GROUP *group, const SM2CiphertextValue *cv,
unsigned char **pout)
{
int ret = 0, outlen = 0, nbytes;
EC_POINT *point = NULL;
BN_CTX *bn_ctx = NULL;
unsigned char *buf;
unsigned char *p;
if (!group || !cv || !pout) {
SM2err(SM2_F_I2O_SM2CIPHERTEXTVALUE,
ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
nbytes = (EC_GROUP_get_degree(group) + 7)/8;
if (!cv->xCoordinate || BN_num_bytes(cv->xCoordinate) > nbytes
|| !cv->yCoordinate || BN_num_bytes(cv->BN_num_bytes) > nbytes
|| ASN1_STRING_length(cv->hash) <= 0
|| ASN1_STRING_length(cv->hash) > EVP_MAX_MD_SIZE
|| ASN1_STRING_length(cv->ciphertext) <= 0) {
SM2err(SM2_F_I2O_SM2CIPHERTEXTVALUE, SM2_R_INVALID_CIPHERTEXT);
return 0;
}
/* prepare buffer */
if (*pout) {
p = *pout;
} else {
size_t buflen = 1 + nbytes * 2
+ ASN1_STRING_length(cv->ciphertext)
+ ASN1_STRING_length(cv->hash);
if (!(buf = OPENSSL_malloc(buflen))) {
SM2err(SM2_F_I2O_SM2CIPHERTEXTVALUE,
ERR_R_MALLOC_FAILURE);
return 0;
}
p = buf;
}
/* encode x, y */
if (!(point = EC_POINT_new(group)) || !(bn_ctx = BN_CTX_new())) {
SM2err(SM2_F_I2O_SM2CIPHERTEXTVALUE, ERR_R_MALLOC_FAILURE);
goto end;
}
if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) == NID_X9_62_prime_field) {
if (!EC_POINT_set_affine_coordinates_GFp(group, point,
cv->xCoordinate, cv->yCoordinate, bn_ctx)) {
goto end;
}
} else {
if (!EC_POINT_set_affine_coordinates_GF2m(group, point,
cv->xCoordinate, cv->yCoordinate, bn_ctx)) {
goto end;
}
}
if (!(siz = EC_POINT_point2oct(group, point,
POINT_CONVERSION_UNCOMPRESSED, p, 1 + 2 * nbytes, bn_ctx))) {
SM2err(SM2_F_I2O_SM2CIPHERTEXTVALUE, ERR_R_EC_LIB);
goto end;
}
OPENSSL_assert(siz == 1 + 2 * nbytes);
p += siz;
outlen += siz;
/* encode ciphertext */
memcpy(p, ASN1_STRING_get0_data(cv->ciphertext),
ASN1_STRING_length(cv->ciphertext));
p += ASN1_STRING_length(cv->ciphertext);
outlen += siz;
/* encode hash */
memcpy(out, ASN1_STRING_get0_data(cv->hash),
ASN1_STRING_length(cv->hash));
p += ASN1_STRING_length(cv->hash);
outlen += siz;
/* output */
if (*pout) {
*pout = p;
} else {
*pout = buf;
buf = NULL;
}
ret = outlen;
end:
EC_POINT_free(point);
BN_CTX_free(bn_ctx);
return ret;
}
SM2CiphertextValue *o2i_SM2CiphertextValue(const EC_GROUP *group,
const EVP_MD *md, SM2CiphertextValue **pout,
const unsigned char **pin, long len)
{
SM2CiphertextValue *ret = NULL;
SM2CiphertextValue *cv = NULL;
BN_CTX *bn_ctx = NULL;
unsigned char *p;
if (!group || !pin) {
SM2err(SM2_F_O2I_SM2CIPHERTEXTVALUE,
ERR_R_PASSED_NULL_PARAMETER);
return NULL;
}
nbytes = (EC_GROUP_get_degree(group) + 7)/8;
if (len <= 1 + nbytes * 2 + EVP_MD_size(md)) {
SM2err(SM2_F_O2I_SM2CIPHERTEXTVALUE,
SM2_R_INVALID_CIPHERTEXT);
return NULL;
}
if (pout && *pout) {
cv = *pout;
} else {
if (!(cv = SM2CiphertextValue_new())) {
SM2err(SM2_F_O2I_SM2CIPHERTEXTVALUE,
ERR_R_MALLOC_FAILURE);
goto end;
}
}
if (!(point = EC_POINT_new(group))
|| !(bn_ctx = BN_CTX_new(bn_ctx))) {
SM2err(SM2_F_O2I_SM2CIPHERTEXTVALUE,
ERR_R_MALLOC_FAILURE);
goto end;
}
p = *pin;
/* set (x, y) */
if (!EC_POINT_oct2point(group, point, p, 1 + nbytes * 2, bn_ctx)) {
SM2err(SM2_F_O2I_SM2CIPHERTEXTVALUE,
SM2_R_INVALID_CIPHERTEXT);
goto end;
}
p += 1 + nbytes * 2;
len -= 1 + nbytes * 2;
if (!cv->xCoordinate) {
if (!(cv->xCoordinate = BN_new())) {
SM2err(SM2_F_O2I_SM2CIPHERTEXTVALUE,
ERR_R_MALLOC_FAILURE);
goto end;
}
}
if (!cv->yCoordinate) {
if (!(cv->yCoordinate = BN_new())) {
SM2err(SM2_F_O2I_SM2CIPHERTEXTVALUE,
ERR_R_MALLOC_FAILURE);
goto end;
}
}
if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) == NID_X9_62_prime_field) {
if (!EC_POINT_get_affine_coordinates_GFp(group, point,
cv->xCoordinate, cv->yCoordinate, bn_ctx)) {
SM2err(SM2_F_O2I_SM2CIPHERTEXTVALUE, ERR_R_EC_LIB);
goto end;
}
} else {
if (!EC_POINT_get_affine_coordinates_GF2m(group, point,
cv->xCoordinate, cv->yCoordinate, bn_ctx)) {
SM2err(SM2_F_O2I_SM2CIPHERTEXTVALUE, ERR_R_EC_LIB);
goto end;
}
}
/* set ciphertext */
if (!cv->ciphertext) {
if (!(cv->ciphertext = ASN1_OCTET_STRING_new())) {
SM2err(SM2_F_O2I_SM2CIPHERTEXTVALUE,
ERR_R_MALLOC_FAILURE);
goto end;
}
}
if (!ASN1_OCTET_STRING_set(cv->ciphertext, p, len - EVP_MD_size(md))) {
SM2err(SM2_F_O2I_SM2CIPHERTEXTVALUE, ERR_R_ASN1_LIB);
goto end;
}
p += len - EVP_MD_size(md);
/* set hash */
if (!cv->hash) {
if (!(cv->hash = ASN1_OCTET_STRING_new())) {
SM2err(SM2_F_O2I_SM2CIPHERTEXTVALUE,
ERR_R_MALLOC_FAILURE);
goto end;
}
}
if (!ASN1_OCTET_STRING_set(cv->hash, p, EVP_MD_size(md))) {
SM2err(SM2_F_O2I_SM2CIPHERTEXTVALUE, ERR_R_ASN1_LIB);
goto end;
}
p += EVP_MD_size(md);
/* set result */
*pin = p;
ret = cv;
end:
SM2CiphertextValue_free(cv);
EC_POINT_free(point);
BN_CTX_free(bn_ctx);
return ret;
}
int SM2_encrypt(const EVP_MD *md, const unsigned char *in, size_t inlen,
unsigned char *out, size_t *outlen, EC_KEY *ec_key)
{
int ret = 0;
SM2CiphertextValue *cv = NULL;
if (!(cv = SM2_do_encrypt(md, in, inlen, ec_key))) {
goto end;
}
if (!out) {
len = i2o_SM2CiphertextValue(cv, NULL);
*outlen = len;
return 1;
}
if (!(i2o_SM2CiphertextValue(cv, &out))) {
goto end;
}
return 0;
}
int SM2_decrypt(int type, const unsigned char *in, size_t inlen,
unsigned char *out, size_t *outlen, EC_KEY *ec_key)
{
SM2CiphertextValue *cv = NULL;
}

92
crypto/sm2/sm2_sign.c
View File

@@ -69,13 +69,13 @@ static int sm2_sign_setup(EC_KEY *ec_key, BN_CTX *ctx_in, BIGNUM **kp, BIGNUM **
EC_POINT *point = NULL;
if (ec_key == NULL || (ec_group = EC_KEY_get0_group(ec_key)) == NULL) {
ECerr(EC_F_SM2_SIGN_SETUP, ERR_R_PASSED_NULL_PARAMETER);
SM2err(SM2_F_SM2_SIGN_SETUP, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
if (ctx_in == NULL) {
if ((ctx = BN_CTX_new()) == NULL) {
ECerr(EC_F_SM2_SIGN_SETUP,ERR_R_MALLOC_FAILURE);
SM2err(SM2_F_SM2_SIGN_SETUP, ERR_R_MALLOC_FAILURE);
return 0;
}
}
@@ -87,17 +87,17 @@ static int sm2_sign_setup(EC_KEY *ec_key, BN_CTX *ctx_in, BIGNUM **kp, BIGNUM **
x = BN_new();
order = BN_new();
if (!k || !x || !order) {
ECerr(EC_F_SM2_SIGN_SETUP, ERR_R_MALLOC_FAILURE);
SM2err(SM2_F_SM2_SIGN_SETUP, ERR_R_MALLOC_FAILURE);
goto end;
}
if (!EC_GROUP_get_order(ec_group, order, ctx)) {
ECerr(EC_F_SM2_SIGN_SETUP, ERR_R_EC_LIB);
SM2err(SM2_F_SM2_SIGN_SETUP, ERR_R_EC_LIB);
goto end;
}
if ((point = EC_POINT_new(ec_group)) == NULL) {
ECerr(EC_F_SM2_SIGN_SETUP, ERR_R_EC_LIB);
SM2err(SM2_F_SM2_SIGN_SETUP, ERR_R_EC_LIB);
goto end;
}
@@ -105,8 +105,8 @@ static int sm2_sign_setup(EC_KEY *ec_key, BN_CTX *ctx_in, BIGNUM **kp, BIGNUM **
/* get random k */
do {
if (!BN_rand_range(k, order)) {
ECerr(EC_F_SM2_SIGN_SETUP,
EC_R_RANDOM_NUMBER_GENERATION_FAILED);
SM2err(SM2_F_SM2_SIGN_SETUP,
SM2_R_RANDOM_NUMBER_GENERATION_FAILED);
goto end;
}
@@ -114,24 +114,24 @@ static int sm2_sign_setup(EC_KEY *ec_key, BN_CTX *ctx_in, BIGNUM **kp, BIGNUM **
/* compute r the x-coordinate of generator * k */
if (!EC_POINT_mul(ec_group, point, k, NULL, NULL, ctx)) {
ECerr(EC_F_SM2_SIGN_SETUP, ERR_R_EC_LIB);
SM2err(SM2_F_SM2_SIGN_SETUP, ERR_R_EC_LIB);
goto end;
}
if (EC_METHOD_get_field_type(EC_GROUP_method_of(ec_group)) == NID_X9_62_prime_field) {
if (!EC_POINT_get_affine_coordinates_GFp(ec_group, point, x, NULL, ctx)) {
ECerr(EC_F_SM2_SIGN_SETUP,ERR_R_EC_LIB);
SM2err(SM2_F_SM2_SIGN_SETUP, ERR_R_EC_LIB);
goto end;
}
} else /* NID_X9_62_characteristic_two_field */ {
if (!EC_POINT_get_affine_coordinates_GF2m(ec_group, point, x, NULL, ctx)) {
ECerr(EC_F_SM2_SIGN_SETUP,ERR_R_EC_LIB);
SM2err(SM2_F_SM2_SIGN_SETUP, ERR_R_EC_LIB);
goto end;
}
}
if (!BN_nnmod(x, x, order, ctx)) {
ECerr(EC_F_SM2_SIGN_SETUP, ERR_R_BN_LIB);
SM2err(SM2_F_SM2_SIGN_SETUP, ERR_R_BN_LIB);
goto end;
}
@@ -178,12 +178,12 @@ static ECDSA_SIG *sm2_do_sign(const unsigned char *dgst, int dgstlen,
ec_group = EC_KEY_get0_group(ec_key);
priv_key = EC_KEY_get0_private_key(ec_key);
if (!ec_group || !priv_key) {
ECerr(EC_F_SM2_DO_SIGN, ERR_R_PASSED_NULL_PARAMETER);
SM2err(SM2_F_SM2_DO_SIGN, ERR_R_PASSED_NULL_PARAMETER);
return NULL;
}
if (!(ret = ECDSA_SIG_new())) {
ECerr(EC_F_SM2_DO_SIGN, ERR_R_MALLOC_FAILURE);
SM2err(SM2_F_SM2_DO_SIGN, ERR_R_MALLOC_FAILURE);
return NULL;
}
ret->r = BN_new();
@@ -193,11 +193,11 @@ static ECDSA_SIG *sm2_do_sign(const unsigned char *dgst, int dgstlen,
e = BN_new();
bn = BN_new();
if (!ret->r || !ret->s || !ctx || !order || !e || !bn) {
ECerr(EC_F_SM2_DO_SIGN, ERR_R_MALLOC_FAILURE);
SM2err(SM2_F_SM2_DO_SIGN, ERR_R_MALLOC_FAILURE);
goto end;
}
if (!EC_GROUP_get_order(ec_group, order, ctx)) {
ECerr(EC_F_SM2_DO_SIGN, ERR_R_EC_LIB);
SM2err(SM2_F_SM2_DO_SIGN, ERR_R_EC_LIB);
goto end;
}
@@ -209,13 +209,13 @@ static ECDSA_SIG *sm2_do_sign(const unsigned char *dgst, int dgstlen,
}
#endif
if (!BN_bin2bn(dgst, dgstlen, e)) {
ECerr(EC_F_SM2_DO_SIGN, ERR_R_BN_LIB);
SM2err(SM2_F_SM2_DO_SIGN, ERR_R_BN_LIB);
goto end;
}
#if 0
if ((8 * dgstlen > i) && !BN_rshift(e, e, 8 - (i & 0x7))) {
ECerr(EC_F_SM2_DO_SIGN, ERR_R_BN_LIB);
SM2err(SM2_F_SM2_DO_SIGN, ERR_R_BN_LIB);
goto end;
}
#endif
@@ -224,33 +224,33 @@ static ECDSA_SIG *sm2_do_sign(const unsigned char *dgst, int dgstlen,
/* use or compute k and (kG).x */
if (!in_k || !in_x) {
if (!sm2_sign_setup(ec_key, ctx, &k, &ret->r)) {
ECerr(EC_F_SM2_DO_SIGN,ERR_R_ECDSA_LIB);
SM2err(SM2_F_SM2_DO_SIGN, ERR_R_ECDSA_LIB);
goto end;
}
ck = k;
} else {
ck = in_k;
if (!BN_copy(ret->r, in_x)) {
ECerr(EC_F_SM2_DO_SIGN, ERR_R_MALLOC_FAILURE);
SM2err(SM2_F_SM2_DO_SIGN, ERR_R_MALLOC_FAILURE);
goto end;
}
}
/* r = e + x (mod n) */
if (!BN_mod_add(ret->r, ret->r, e, order, ctx)) {
ECerr(EC_F_SM2_DO_SIGN, ERR_R_BN_LIB);
SM2err(SM2_F_SM2_DO_SIGN, ERR_R_BN_LIB);
goto end;
}
if (!BN_mod_add(bn, ret->r, ck, order, ctx)) {
ECerr(EC_F_SM2_DO_SIGN, ERR_R_BN_LIB);
SM2err(SM2_F_SM2_DO_SIGN, ERR_R_BN_LIB);
goto end;
}
/* check r != 0 && r + k != n */
if (BN_is_zero(ret->r) || BN_is_zero(bn)) {
if (in_k && in_x) {
ECerr(EC_F_SM2_DO_SIGN, EC_R_NEED_NEW_SETUP_VALUES);
SM2err(SM2_F_SM2_DO_SIGN, SM2_R_NEED_NEW_SETUP_VALUES);
goto end;
} else
continue;
@@ -258,36 +258,36 @@ static ECDSA_SIG *sm2_do_sign(const unsigned char *dgst, int dgstlen,
/* s = ((1 + d)^-1 * (k - rd)) mod n */
if (!BN_one(bn)) {
ECerr(EC_F_SM2_DO_SIGN, ERR_R_BN_LIB);
SM2err(SM2_F_SM2_DO_SIGN, ERR_R_BN_LIB);
goto end;
}
if (!BN_mod_add(ret->s, priv_key, bn, order, ctx)) {
ECerr(EC_F_SM2_DO_SIGN, ERR_R_BN_LIB);
SM2err(SM2_F_SM2_DO_SIGN, ERR_R_BN_LIB);
goto end;
}
if (!BN_mod_inverse(ret->s, ret->s, order, ctx)) {
ECerr(EC_F_SM2_DO_SIGN, ERR_R_BN_LIB);
SM2err(SM2_F_SM2_DO_SIGN, ERR_R_BN_LIB);
goto end;
}
if (!BN_mod_mul(bn, ret->r, priv_key, order, ctx)) {
ECerr(EC_F_SM2_DO_SIGN, ERR_R_BN_LIB);
SM2err(SM2_F_SM2_DO_SIGN, ERR_R_BN_LIB);
goto end;
}
if (!BN_mod_sub(bn, ck, bn, order, ctx)) {
ECerr(EC_F_SM2_DO_SIGN, ERR_R_BN_LIB);
SM2err(SM2_F_SM2_DO_SIGN, ERR_R_BN_LIB);
goto end;
}
if (!BN_mod_mul(ret->s, ret->s, bn, order, ctx)) {
ECerr(EC_F_SM2_DO_SIGN, ERR_R_BN_LIB);
SM2err(SM2_F_SM2_DO_SIGN, ERR_R_BN_LIB);
goto end;
}
/* check s != 0 */
if (BN_is_zero(ret->s)) {
if (in_k && in_x) {
ECerr(EC_F_SM2_DO_SIGN, EC_R_NEED_NEW_SETUP_VALUES);
SM2err(SM2_F_SM2_DO_SIGN, SM2_R_NEED_NEW_SETUP_VALUES);
goto end;
}
} else {
@@ -298,13 +298,13 @@ static ECDSA_SIG *sm2_do_sign(const unsigned char *dgst, int dgstlen,
#if 0
if (!BN_rshift1(bn, order)) {
ECerr(EC_F_SM2_DO_SIGN, ERR_R_BN_LIB);
SM2err(SM2_F_SM2_DO_SIGN, ERR_R_BN_LIB);
goto end;
}
if (BN_cmp(ret->r, bn) <= 0) {
if (!BN_sub(ret->r, order, ret->r)
|| !BN_sub(ret->s, order, ret->s)) {
ECerr(EC_F_SM2_DO_SIGN, ERR_R_BN_LIB);
SM2err(SM2_F_SM2_DO_SIGN, ERR_R_BN_LIB);
goto end;
}
}
@@ -344,7 +344,7 @@ int sm2_do_verify(const unsigned char *dgst, int dgstlen,
!(ec_group = EC_KEY_get0_group(ec_key)) ||
!(pub_key = EC_KEY_get0_public_key(ec_key))) {
ECerr(EC_F_SM2_DO_VERIFY, EC_R_MISSING_PARAMETERS);
SM2err(SM2_F_SM2_DO_VERIFY, SM2_R_MISSING_PARAMETERS);
return -1;
}
@@ -353,21 +353,21 @@ int sm2_do_verify(const unsigned char *dgst, int dgstlen,
e = BN_new();
t = BN_new();
if (!ctx || !order || !e || !t) {
ECerr(EC_F_SM2_DO_VERIFY, ERR_R_MALLOC_FAILURE);
SM2err(SM2_F_SM2_DO_VERIFY, ERR_R_MALLOC_FAILURE);
goto end;
}
if (!EC_GROUP_get_order(ec_group, order, ctx)) {
ECerr(EC_F_SM2_DO_VERIFY, ERR_R_EC_LIB);
SM2err(SM2_F_SM2_DO_VERIFY, ERR_R_EC_LIB);
goto end;
}
#if 0
if (!BN_rshift1(t, order)) {
ECerr(EC_F_SM2_DO_VERIFY, ERR_R_BN_LIB);
SM2err(SM2_F_SM2_DO_VERIFY, ERR_R_BN_LIB);
goto end;
}
if (BN_cmp(sig->r, t) <= 0) {
ECerr(EC_F_SM2_DO_VERIFY, ERR_R_BN_LIB); //FIXME: error code
SM2err(SM2_F_SM2_DO_VERIFY, ERR_R_BN_LIB); //FIXME: error code
goto end;
}
#endif
@@ -380,14 +380,14 @@ int sm2_do_verify(const unsigned char *dgst, int dgstlen,
BN_is_negative(sig->s) ||
BN_ucmp(sig->s, order) >= 0) {
ECerr(EC_F_SM2_DO_VERIFY, EC_R_BAD_SIGNATURE);
SM2err(SM2_F_SM2_DO_VERIFY, SM2_R_BAD_SIGNATURE);
ret = 0;
goto end;
}
/* check t = r + s != 0 */
if (!BN_mod_add(t, sig->r, sig->s, order, ctx)) {
ECerr(EC_F_SM2_DO_VERIFY, ERR_R_BN_LIB);
SM2err(SM2_F_SM2_DO_VERIFY, ERR_R_BN_LIB);
goto end;
}
if (BN_is_zero(t)) {
@@ -403,44 +403,44 @@ int sm2_do_verify(const unsigned char *dgst, int dgstlen,
}
#endif
if (!BN_bin2bn(dgst, dgstlen, e)) {
ECerr(EC_F_SM2_DO_VERIFY, ERR_R_BN_LIB);
SM2err(SM2_F_SM2_DO_VERIFY, ERR_R_BN_LIB);
goto end;
}
#if 0
if ((8 * dgstlen > i) && !BN_rshift(e, e, 8 - (i & 0x7))) {
ECerr(EC_F_SM2_DO_VERIFY, ERR_R_BN_LIB);
SM2err(SM2_F_SM2_DO_VERIFY, ERR_R_BN_LIB);
goto end;
}
#endif
/* compute (x, y) = sG + tP, P is pub_key */
if (!(point = EC_POINT_new(ec_group))) {
ECerr(EC_F_SM2_DO_VERIFY, ERR_R_MALLOC_FAILURE);
SM2err(SM2_F_SM2_DO_VERIFY, ERR_R_MALLOC_FAILURE);
goto end;
}
if (!EC_POINT_mul(ec_group, point, sig->s, pub_key, t, ctx)) {
ECerr(EC_F_SM2_DO_VERIFY, ERR_R_EC_LIB);
SM2err(SM2_F_SM2_DO_VERIFY, ERR_R_EC_LIB);
goto end;
}
if (EC_METHOD_get_field_type(EC_GROUP_method_of(ec_group)) == NID_X9_62_prime_field) {
if (!EC_POINT_get_affine_coordinates_GFp(ec_group, point, t, NULL, ctx)) {
ECerr(EC_F_SM2_DO_VERIFY, ERR_R_EC_LIB);
SM2err(SM2_F_SM2_DO_VERIFY, ERR_R_EC_LIB);
goto end;
}
} else /* NID_X9_62_characteristic_two_field */ {
if (!EC_POINT_get_affine_coordinates_GF2m(ec_group, point, t, NULL, ctx)) {
ECerr(EC_F_SM2_DO_VERIFY, ERR_R_EC_LIB);
SM2err(SM2_F_SM2_DO_VERIFY, ERR_R_EC_LIB);
goto end;
}
}
if (!BN_nnmod(t, t, order, ctx)) {
ECerr(EC_F_SM2_DO_VERIFY, ERR_R_BN_LIB);
SM2err(SM2_F_SM2_DO_VERIFY, ERR_R_BN_LIB);
goto end;
}
/* check (sG + tP).x + e == sig.r */
if (!BN_mod_add(t, t, e, order, ctx)) {
ECerr(EC_F_SM2_DO_VERIFY, ERR_R_BN_LIB);
SM2err(SM2_F_SM2_DO_VERIFY, ERR_R_BN_LIB);
goto end;
}
if (BN_ucmp(t, sig->r) == 0) {