mirror of
https://github.com/guanzhi/GmSSL.git
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165 lines
6.2 KiB
C
165 lines
6.2 KiB
C
/*
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* Copyright 2014-2021 The GmSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef GMSSL_SM2_H
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#define GMSSL_SM2_H
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <gmssl/sm3.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct {
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uint8_t x[32];
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uint8_t y[32];
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} SM2_POINT;
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void sm2_point_to_compressed_octets(const SM2_POINT *P, uint8_t out[33]);
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void sm2_point_to_uncompressed_octets(const SM2_POINT *P, uint8_t out[65]);
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int sm2_point_from_octets(SM2_POINT *P, const uint8_t *in, size_t inlen);
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int sm2_point_to_der(const SM2_POINT *a, uint8_t **out, size_t *outlen);
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int sm2_point_from_der(SM2_POINT *a, const uint8_t **in, size_t *inlen);
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int sm2_point_from_x(SM2_POINT *P, const uint8_t x[32], int y);
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int sm2_point_from_xy(SM2_POINT *P, const uint8_t x[32], const uint8_t y[32]);
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int sm2_point_is_on_curve(const SM2_POINT *P);
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int sm2_point_mul(SM2_POINT *R, const uint8_t k[32], const SM2_POINT *P);
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int sm2_point_mul_generator(SM2_POINT *R, const uint8_t k[32]);
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int sm2_point_mul_sum(SM2_POINT *R, const uint8_t k[32], const SM2_POINT *P, const uint8_t s[32]);
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int sm2_point_print(FILE *fp, const SM2_POINT *P, int format, int indent);
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int sm2_compute_z(uint8_t z[32], const SM2_POINT *pub, const char *id);
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typedef struct {
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SM2_POINT public_key;
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uint8_t private_key[32];
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uint8_t key_usage[4];
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} SM2_KEY;
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int sm2_keygen(SM2_KEY *key);
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int sm2_set_private_key(SM2_KEY *key, const uint8_t private_key[32]);
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int sm2_set_public_key(SM2_KEY *key, const uint8_t public_key[64]); // FIXME: 这里是否应该用octets呢？这算是椭圆曲线点的一个公开格式了
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int sm2_key_print(FILE *fp, const SM2_KEY *key, int format, int indent);
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int sm2_public_key_digest(const SM2_KEY *key, uint8_t dgst[32]);
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// ECPrivateKey
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int sm2_private_key_to_der(const SM2_KEY *key, uint8_t **out, size_t *outlen);
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int sm2_private_key_to_pem(const SM2_KEY *key, FILE *fp);
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int sm2_private_key_from_der(SM2_KEY *key, const uint8_t **in, size_t *inlen);
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int sm2_private_key_from_pem(SM2_KEY *key, FILE *fp);
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// AlgorithmIdentifier
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int sm2_public_key_algor_to_der(uint8_t **out, size_t *outlen);
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int sm2_public_key_algor_from_der(const uint8_t **in, size_t *inlen);
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// X.509 SubjectPublicKeyInfo
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int sm2_public_key_info_to_der(const SM2_KEY *a, uint8_t **out, size_t *outlen);
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int sm2_public_key_info_to_pem(const SM2_KEY *a, FILE *fp);
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int sm2_public_key_info_from_der(SM2_KEY *a, const uint8_t **in, size_t *inlen);
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int sm2_public_key_info_from_pem(SM2_KEY *a, FILE *fp);
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// PKCS #8 PrivateKeyInfo
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int sm2_private_key_info_to_der(const SM2_KEY *key, uint8_t **out, size_t *outlen);
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int sm2_private_key_info_from_der(SM2_KEY *key, const uint8_t **attrs, size_t *attrslen, const uint8_t **in, size_t *inlen);
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int sm2_private_key_info_to_pem(const SM2_KEY *key, FILE *fp);
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int sm2_private_key_info_from_pem(SM2_KEY *key, const uint8_t **attrs, size_t *attrslen, FILE *fp);
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typedef struct {
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uint8_t r[32];
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uint8_t s[32];
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} SM2_SIGNATURE;
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int sm2_signature_to_der(const SM2_SIGNATURE *sig, uint8_t **out, size_t *outlen);
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int sm2_signature_from_der(SM2_SIGNATURE *sig, const uint8_t **in, size_t *inlen);
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int sm2_do_sign(const SM2_KEY *key, const uint8_t dgst[32], SM2_SIGNATURE *sig);
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int sm2_do_verify(const SM2_KEY *key, const uint8_t dgst[32], const SM2_SIGNATURE *sig);
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int sm2_print_signature(FILE *fp, const uint8_t *sig, size_t siglen, int format, int indent);
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#define SM2_MAX_SIGNATURE_SIZE 72
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int sm2_sign(const SM2_KEY *key, const uint8_t dgst[32], uint8_t *sig, size_t *siglen);
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int sm2_verify(const SM2_KEY *key, const uint8_t dgst[32], const uint8_t *sig, size_t siglen);
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#define SM2_MAX_ID_BITS 65535
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#define SM2_MAX_ID_LENGTH (SM2_MAX_ID_BITS/8)
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#define SM2_MAX_ID_SIZE (SM2_MAX_ID_BITS/8)
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#define SM2_DEFAULT_ID_GMT09 "1234567812345678"
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#define SM2_DEFAULT_ID_GMSSL "anonym@gmssl.org"
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#define SM2_DEFAULT_ID SM2_DEFAULT_ID_GMT09
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#define SM2_DEFAULT_ID_LENGTH (sizeof(SM2_DEFAULT_ID) - 1)
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#define SM2_DEFAULT_ID_BITS (SM2_DEFAULT_ID_LENGTH * 8)
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#define SM2_DEFAULT_ID_DIGEST_LENGTH SM3_DIGEST_LENGTH
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typedef struct {
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SM2_KEY key;
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SM3_CTX sm3_ctx;
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int flags;
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} SM2_SIGN_CTX;
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int sm2_sign_init(SM2_SIGN_CTX *ctx, const SM2_KEY *key, const char *id);
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int sm2_sign_update(SM2_SIGN_CTX *ctx, const uint8_t *data, size_t datalen);
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int sm2_sign_finish(SM2_SIGN_CTX *ctx, uint8_t *sig, size_t *siglen);
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int sm2_verify_init(SM2_SIGN_CTX *ctx, const SM2_KEY *key, const char *id);
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int sm2_verify_update(SM2_SIGN_CTX *ctx, const uint8_t *data, size_t datalen);
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int sm2_verify_finish(SM2_SIGN_CTX *ctx, const uint8_t *sig, size_t siglen);
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typedef struct {
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SM2_POINT point;
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uint8_t hash[32];
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uint32_t ciphertext_size;
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uint8_t ciphertext[1];
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} SM2_CIPHERTEXT;
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#define SM2_MAX_PLAINTEXT 256
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#define SM2_MAX_PLAINTEXT_SIZE 256
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#define SM2_CIPHERTEXT_SIZE(inlen) (sizeof(SM2_CIPHERTEXT)-1+inlen)
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#define SM2_MAX_CIPHERTEXT_SIZE 512
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int sm2_ciphertext_to_der(const SM2_CIPHERTEXT *c, uint8_t **out, size_t *outlen);
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int sm2_ciphertext_from_der(SM2_CIPHERTEXT *c, const uint8_t **in, size_t *inlen);
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int sm2_ciphertext_print(FILE *fp, const SM2_CIPHERTEXT *c, int format, int indent);
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int sm2_do_encrypt(const SM2_KEY *key, const uint8_t *in, size_t inlen, SM2_CIPHERTEXT *out);
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int sm2_do_decrypt(const SM2_KEY *key, const SM2_CIPHERTEXT *in, uint8_t *out, size_t *outlen);
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int sm2_encrypt(const SM2_KEY *key, const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
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int sm2_decrypt(const SM2_KEY *key, const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
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int sm2_print_ciphertext(FILE *fp, const uint8_t *c, size_t clen, int format, int indent);
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int sm2_ecdh(const SM2_KEY *key, const SM2_POINT *peer_public, SM2_POINT *out);
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int sm2_algo_selftest(void);
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#ifdef __cplusplus
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extern "C" {
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#endif
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#endif
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