383 lines
15 KiB
C
383 lines
15 KiB
C
/*
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* Copyright 2014-2023 The GmSSL Project. All Rights Reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the License); you may
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* not use this file except in compliance with the License.
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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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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#include <gmssl/api.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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SM2 Public API
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SM2_DEFAULT_ID
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SM2_MAX_ID_LENGTH
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SM2_MAX_SIGNATURE_SIZE
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SM2_MAX_PLAINTEXT_SIZE
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SM2_MAX_CIPHERTEXT_SIZE
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SM2_KEY
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sm2_key_generate
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sm2_private_key_info_encrypt_to_der
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sm2_private_key_info_decrypt_from_der
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sm2_private_key_info_encrypt_to_pem
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sm2_private_key_info_decrypt_from_pem
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sm2_public_key_info_to_der
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sm2_public_key_info_from_der
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sm2_public_key_info_to_pem
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sm2_public_key_info_from_pem
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sm2_sign
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sm2_verify
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sm2_encrypt
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sm2_decrypt
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sm2_ecdh
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SM2_SIGN_CTX
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sm2_sign_init
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sm2_sign_update
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sm2_sign_finish
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sm2_verify_init
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sm2_verify_update
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sm2_verify_finish
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*/
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typedef uint64_t SM2_BN[8];
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int sm2_bn_is_zero(const SM2_BN a);
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int sm2_bn_is_one(const SM2_BN a);
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int sm2_bn_is_odd(const SM2_BN a);
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int sm2_bn_cmp(const SM2_BN a, const SM2_BN b);
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int sm2_bn_from_hex(SM2_BN r, const char hex[64]);
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int sm2_bn_from_asn1_integer(SM2_BN r, const uint8_t *d, size_t dlen);
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int sm2_bn_equ_hex(const SM2_BN a, const char *hex);
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int sm2_bn_print(FILE *fp, int fmt, int ind, const char *label, const SM2_BN a);
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int sm2_bn_rshift(SM2_BN ret, const SM2_BN a, unsigned int nbits);
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void sm2_bn_to_bytes(const SM2_BN a, uint8_t out[32]);
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void sm2_bn_from_bytes(SM2_BN r, const uint8_t in[32]);
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void sm2_bn_to_hex(const SM2_BN a, char hex[64]);
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void sm2_bn_to_bits(const SM2_BN a, char bits[256]);
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void sm2_bn_set_word(SM2_BN r, uint32_t a);
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void sm2_bn_add(SM2_BN r, const SM2_BN a, const SM2_BN b);
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void sm2_bn_sub(SM2_BN ret, const SM2_BN a, const SM2_BN b);
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int sm2_bn_rand_range(SM2_BN r, const SM2_BN range);
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#define sm2_bn_init(r) memset((r),0,sizeof(SM2_BN))
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#define sm2_bn_set_zero(r) memset((r),0,sizeof(SM2_BN))
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#define sm2_bn_set_one(r) sm2_bn_set_word((r),1)
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#define sm2_bn_copy(r,a) memcpy((r),(a),sizeof(SM2_BN))
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#define sm2_bn_clean(r) memset((r),0,sizeof(SM2_BN))
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// GF(p)
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typedef SM2_BN SM2_Fp;
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void sm2_fp_add(SM2_Fp r, const SM2_Fp a, const SM2_Fp b);
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void sm2_fp_sub(SM2_Fp r, const SM2_Fp a, const SM2_Fp b);
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void sm2_fp_mul(SM2_Fp r, const SM2_Fp a, const SM2_Fp b);
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void sm2_fp_exp(SM2_Fp r, const SM2_Fp a, const SM2_Fp e);
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void sm2_fp_dbl(SM2_Fp r, const SM2_Fp a);
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void sm2_fp_tri(SM2_Fp r, const SM2_Fp a);
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void sm2_fp_div2(SM2_Fp r, const SM2_Fp a);
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void sm2_fp_neg(SM2_Fp r, const SM2_Fp a);
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void sm2_fp_sqr(SM2_Fp r, const SM2_Fp a);
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void sm2_fp_inv(SM2_Fp r, const SM2_Fp a);
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int sm2_fp_rand(SM2_Fp r);
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int sm2_fp_sqrt(SM2_Fp r, const SM2_Fp a);
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#define sm2_fp_init(r) sm2_bn_init(r)
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#define sm2_fp_set_zero(r) sm2_bn_set_zero(r)
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#define sm2_fp_set_one(r) sm2_bn_set_one(r)
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#define sm2_fp_copy(r,a) sm2_bn_copy(r,a)
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#define sm2_fp_clean(r) sm2_bn_clean(r)
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// GF(n)
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typedef SM2_BN SM2_Fn;
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void sm2_fn_add(SM2_Fn r, const SM2_Fn a, const SM2_Fn b);
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void sm2_fn_sub(SM2_Fn r, const SM2_Fn a, const SM2_Fn b);
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void sm2_fn_mul(SM2_Fn r, const SM2_Fn a, const SM2_Fn b);
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void sm2_fn_mul_word(SM2_Fn r, const SM2_Fn a, uint32_t b);
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void sm2_fn_exp(SM2_Fn r, const SM2_Fn a, const SM2_Fn e);
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void sm2_fn_neg(SM2_Fn r, const SM2_Fn a);
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void sm2_fn_sqr(SM2_Fn r, const SM2_Fn a);
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void sm2_fn_inv(SM2_Fn r, const SM2_Fn a);
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int sm2_fn_rand(SM2_Fn r);
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#define sm2_fn_init(r) sm2_bn_init(r)
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#define sm2_fn_set_zero(r) sm2_bn_set_zero(r)
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#define sm2_fn_set_one(r) sm2_bn_set_one(r)
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#define sm2_fn_copy(r,a) sm2_bn_copy(r,a)
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#define sm2_fn_clean(r) sm2_bn_clean(r)
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typedef struct {
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SM2_BN X;
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SM2_BN Y;
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SM2_BN Z;
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} SM2_JACOBIAN_POINT;
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void sm2_jacobian_point_init(SM2_JACOBIAN_POINT *R);
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void sm2_jacobian_point_set_xy(SM2_JACOBIAN_POINT *R, const SM2_BN x, const SM2_BN y);
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void sm2_jacobian_point_get_xy(const SM2_JACOBIAN_POINT *P, SM2_BN x, SM2_BN y);
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void sm2_jacobian_point_neg(SM2_JACOBIAN_POINT *R, const SM2_JACOBIAN_POINT *P);
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void sm2_jacobian_point_dbl(SM2_JACOBIAN_POINT *R, const SM2_JACOBIAN_POINT *P);
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void sm2_jacobian_point_add(SM2_JACOBIAN_POINT *R, const SM2_JACOBIAN_POINT *P, const SM2_JACOBIAN_POINT *Q);
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void sm2_jacobian_point_sub(SM2_JACOBIAN_POINT *R, const SM2_JACOBIAN_POINT *P, const SM2_JACOBIAN_POINT *Q);
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void sm2_jacobian_point_mul(SM2_JACOBIAN_POINT *R, const SM2_BN k, const SM2_JACOBIAN_POINT *P);
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void sm2_jacobian_point_to_bytes(const SM2_JACOBIAN_POINT *P, uint8_t out[64]);
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void sm2_jacobian_point_from_bytes(SM2_JACOBIAN_POINT *P, const uint8_t in[64]);
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void sm2_jacobian_point_mul_generator(SM2_JACOBIAN_POINT *R, const SM2_BN k);
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void sm2_jacobian_point_mul_sum(SM2_JACOBIAN_POINT *R, const SM2_BN t, const SM2_JACOBIAN_POINT *P, const SM2_BN s);
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void sm2_jacobian_point_from_hex(SM2_JACOBIAN_POINT *P, const char hex[64 * 2]); // for testing only
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int sm2_jacobian_point_is_at_infinity(const SM2_JACOBIAN_POINT *P);
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int sm2_jacobian_point_is_on_curve(const SM2_JACOBIAN_POINT *P);
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int sm2_jacobian_point_equ_hex(const SM2_JACOBIAN_POINT *P, const char hex[128]); // for testing only
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int sm2_jacobian_point_print(FILE *fp, int fmt, int ind, const char *label, const SM2_JACOBIAN_POINT *P);
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#define sm2_jacobian_point_set_infinity(R) sm2_jacobian_point_init(R)
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#define sm2_jacobian_point_copy(R, P) memcpy((R), (P), sizeof(SM2_JACOBIAN_POINT))
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typedef uint8_t sm2_bn_t[32];
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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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#define sm2_point_init(P) memset((P),0,sizeof(SM2_POINT))
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#define sm2_point_set_infinity(P) sm2_point_init(P)
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int sm2_point_from_octets(SM2_POINT *P, const uint8_t *in, size_t inlen);
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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_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_is_at_infinity(const SM2_POINT *P);
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int sm2_point_add(SM2_POINT *R, const SM2_POINT *P, const SM2_POINT *Q);
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int sm2_point_sub(SM2_POINT *R, const SM2_POINT *P, const SM2_POINT *Q);
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int sm2_point_neg(SM2_POINT *R, const SM2_POINT *P);
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int sm2_point_dbl(SM2_POINT *R, 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]); // R = k * P + s * G
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/*
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RFC 5480 Elliptic Curve Cryptography Subject Public Key Information
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ECPoint ::= OCTET STRING
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*/
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#define SM2_POINT_MAX_SIZE (2 + 65)
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int sm2_point_to_der(const SM2_POINT *P, uint8_t **out, size_t *outlen);
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int sm2_point_from_der(SM2_POINT *P, const uint8_t **in, size_t *inlen);
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int sm2_point_print(FILE *fp, int fmt, int ind, const char *label, const SM2_POINT *P);
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int sm2_point_from_hash(SM2_POINT *R, const uint8_t *data, size_t datalen);
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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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} SM2_KEY;
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_gmssl_export int sm2_key_generate(SM2_KEY *key);
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int sm2_key_set_private_key(SM2_KEY *key, const uint8_t private_key[32]); // key->public_key will be replaced
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int sm2_key_set_public_key(SM2_KEY *key, const SM2_POINT *public_key); // key->private_key will be cleared // FIXME: support octets as input?
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int sm2_key_print(FILE *fp, int fmt, int ind, const char *label, const SM2_KEY *key);
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int sm2_public_key_equ(const SM2_KEY *sm2_key, const SM2_KEY *pub_key);
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//int sm2_public_key_copy(SM2_KEY *sm2_key, const SM2_KEY *pub_key); // do we need this?
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int sm2_public_key_digest(const SM2_KEY *key, uint8_t dgst[32]);
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int sm2_public_key_print(FILE *fp, int fmt, int ind, const char *label, const SM2_KEY *pub_key);
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/*
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from RFC 5915
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ECPrivateKey ::= SEQUENCE {
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version INTEGER, -- value MUST be (1)
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privateKey OCTET STRING, -- big endian encoding of integer 这里不是以INTEGER编码的，因此长度固定
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parameters [0] EXPLICIT ECParameters OPTIONAL,
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-- ONLY namedCurve OID is permitted, by RFC 5480
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-- MUST always include this field, by RFC 5915
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publicKey [1] EXPLICIT BIT STRING OPTIONAL -- compressed_point
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-- SHOULD always include this field, by RFC 5915 }
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ECParameters ::= CHOICE { namedCurve OBJECT IDENTIFIER }
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*/
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#define SM2_PRIVATE_KEY_DEFAULT_SIZE 120 // generated
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#define SM2_PRIVATE_KEY_BUF_SIZE 512 // MUST >= SM2_PRIVATE_KEY_DEFAULT_SIZE
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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_from_der(SM2_KEY *key, const uint8_t **in, size_t *inlen);
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int sm2_private_key_print(FILE *fp, int fmt, int ind, const char *label, const uint8_t *d, size_t dlen);
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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_pem(SM2_KEY *key, FILE *fp);
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/*
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AlgorithmIdentifier ::= {
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algorithm OBJECT IDENTIFIER { id-ecPublicKey },
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parameters OBJECT IDENTIFIER { id-sm2 } }
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*/
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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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/*
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SubjectPublicKeyInfo from RFC 5280
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SubjectPublicKeyInfo ::= SEQUENCE {
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algorithm AlgorithmIdentifier,
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subjectPublicKey BIT STRING -- uncompressed octets of ECPoint }
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*/
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_gmssl_export int sm2_public_key_info_to_der(const SM2_KEY *a, uint8_t **out, size_t *outlen);
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_gmssl_export int sm2_public_key_info_from_der(SM2_KEY *a, const uint8_t **in, size_t *inlen);
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_gmssl_export int sm2_public_key_info_to_pem(const SM2_KEY *a, FILE *fp);
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_gmssl_export int sm2_public_key_info_from_pem(SM2_KEY *a, FILE *fp);
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/*
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PKCS #8 PrivateKeyInfo from RFC 5208
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PrivateKeyInfo ::= SEQUENCE {
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version Version { v1(0) },
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privateKeyAlgorithm AlgorithmIdentifier,
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privateKey OCTET STRING, -- DER-encoding of ECPrivateKey
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attributes [0] IMPLICIT SET OF Attribute OPTIONAL }
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*/
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enum {
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PKCS8_private_key_info_version = 0,
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};
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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_print(FILE *fp, int fmt, int ind, const char *label, const uint8_t *d, size_t dlen);
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int sm2_private_key_info_to_pem(const SM2_KEY *key, FILE *fp);
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// FIXME: #define default buffer size for sm2_private_key_info_from_pem
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int sm2_private_key_info_from_pem(SM2_KEY *key, FILE *fp);
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/*
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EncryptedPrivateKeyInfo ::= SEQUENCE {
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encryptionAlgorithm EncryptionAlgorithmIdentifier, -- id-PBES2
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encryptedData OCTET STRING }
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*/
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_gmssl_export int sm2_private_key_info_encrypt_to_der(const SM2_KEY *key,
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const char *pass, uint8_t **out, size_t *outlen);
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_gmssl_export int sm2_private_key_info_decrypt_from_der(SM2_KEY *key, const uint8_t **attrs, size_t *attrs_len,
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const char *pass, const uint8_t **in, size_t *inlen);
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_gmssl_export int sm2_private_key_info_encrypt_to_pem(const SM2_KEY *key, const char *pass, FILE *fp);
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// FIXME: #define default buffer size
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_gmssl_export int sm2_private_key_info_decrypt_from_pem(SM2_KEY *key, const char *pass, 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_do_sign(const SM2_KEY *key, const uint8_t dgst[32], SM2_SIGNATURE *sig);
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int sm2_do_sign_fast(const SM2_Fn d, 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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#define SM2_MIN_SIGNATURE_SIZE 8
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#define SM2_MAX_SIGNATURE_SIZE 72
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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_signature_print(FILE *fp, int fmt, int ind, const char *label, const uint8_t *sig, size_t siglen);
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_gmssl_export int sm2_sign(const SM2_KEY *key, const uint8_t dgst[32], uint8_t *sig, size_t *siglen);
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_gmssl_export int sm2_verify(const SM2_KEY *key, const uint8_t dgst[32], const uint8_t *sig, size_t siglen);
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enum {
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SM2_signature_compact_size = 70,
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SM2_signature_typical_size = 71,
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SM2_signature_max_size = 72,
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};
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int sm2_sign_fixlen(const SM2_KEY *key, const uint8_t dgst[32], size_t siglen, uint8_t *sig);
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#define SM2_DEFAULT_ID "1234567812345678"
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#define SM2_DEFAULT_ID_LENGTH (sizeof(SM2_DEFAULT_ID) - 1) // LENGTH for string and SIZE for bytes
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#define SM2_DEFAULT_ID_BITS (SM2_DEFAULT_ID_LENGTH * 8)
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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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int sm2_compute_z(uint8_t z[32], const SM2_POINT *pub, const char *id, size_t idlen);
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typedef struct {
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SM3_CTX sm3_ctx;
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SM2_KEY key;
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} SM2_SIGN_CTX;
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_gmssl_export int sm2_sign_init(SM2_SIGN_CTX *ctx, const SM2_KEY *key, const char *id, size_t idlen);
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_gmssl_export int sm2_sign_update(SM2_SIGN_CTX *ctx, const uint8_t *data, size_t datalen);
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_gmssl_export int sm2_sign_finish(SM2_SIGN_CTX *ctx, uint8_t *sig, size_t *siglen);
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int sm2_sign_finish_fixlen(SM2_SIGN_CTX *ctx, size_t siglen, uint8_t *sig);
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_gmssl_export int sm2_verify_init(SM2_SIGN_CTX *ctx, const SM2_KEY *key, const char *id, size_t idlen);
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_gmssl_export int sm2_verify_update(SM2_SIGN_CTX *ctx, const uint8_t *data, size_t datalen);
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_gmssl_export int sm2_verify_finish(SM2_SIGN_CTX *ctx, const uint8_t *sig, size_t siglen);
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/*
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SM2Cipher ::= SEQUENCE {
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XCoordinate INTEGER,
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YCoordinate INTEGER,
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HASH OCTET STRING SIZE(32),
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CipherText OCTET STRING }
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*/
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#define SM2_MIN_PLAINTEXT_SIZE 1 // re-compute SM2_MIN_CIPHERTEXT_SIZE when modify
|
||
#define SM2_MAX_PLAINTEXT_SIZE 255 // re-compute SM2_MAX_CIPHERTEXT_SIZE when modify
|
||
|
||
typedef struct {
|
||
SM2_POINT point;
|
||
uint8_t hash[32];
|
||
uint8_t ciphertext_size;
|
||
uint8_t ciphertext[SM2_MAX_PLAINTEXT_SIZE];
|
||
} SM2_CIPHERTEXT;
|
||
|
||
int sm2_do_encrypt(const SM2_KEY *key, const uint8_t *in, size_t inlen, SM2_CIPHERTEXT *out);
|
||
int sm2_do_decrypt(const SM2_KEY *key, const SM2_CIPHERTEXT *in, uint8_t *out, size_t *outlen);
|
||
|
||
#define SM2_MIN_CIPHERTEXT_SIZE 45 // depends on SM2_MIN_PLAINTEXT_SIZE
|
||
#define SM2_MAX_CIPHERTEXT_SIZE 366 // depends on SM2_MAX_PLAINTEXT_SIZE
|
||
int sm2_ciphertext_to_der(const SM2_CIPHERTEXT *c, uint8_t **out, size_t *outlen);
|
||
int sm2_ciphertext_from_der(SM2_CIPHERTEXT *c, const uint8_t **in, size_t *inlen);
|
||
int sm2_ciphertext_print(FILE *fp, int fmt, int ind, const char *label, const uint8_t *a, size_t alen);
|
||
_gmssl_export int sm2_encrypt(const SM2_KEY *key, const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
|
||
_gmssl_export int sm2_decrypt(const SM2_KEY *key, const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
|
||
|
||
enum {
|
||
SM2_ciphertext_compact_point_size = 68,
|
||
SM2_ciphertext_typical_point_size = 69,
|
||
SM2_ciphertext_max_point_size = 70,
|
||
};
|
||
int sm2_do_encrypt_fixlen(const SM2_KEY *key, const uint8_t *in, size_t inlen, int point_size, SM2_CIPHERTEXT *out);
|
||
int sm2_encrypt_fixlen(const SM2_KEY *key, const uint8_t *in, size_t inlen, int point_size, uint8_t *out, size_t *outlen);
|
||
|
||
|
||
int sm2_do_ecdh(const SM2_KEY *key, const SM2_POINT *peer_public, SM2_POINT *out);
|
||
_gmssl_export int sm2_ecdh(const SM2_KEY *key, const uint8_t *peer_public, size_t peer_public_len, SM2_POINT *out);
|
||
|
||
|
||
#ifdef __cplusplus
|
||
}
|
||
#endif
|
||
#endif
|