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256 lines
10 KiB
C
256 lines
10 KiB
C
/*
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* Copyright (c) 2014 - 2021 The GmSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the GmSSL Project.
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* (http://gmssl.org/)"
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*
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* 4. The name "GmSSL Project" must not be used to endorse or promote
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* products derived from this software without prior written
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* permission. For written permission, please contact
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* guanzhi1980@gmail.com.
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*
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* 5. Products derived from this software may not be called "GmSSL"
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* nor may "GmSSL" appear in their names without prior written
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* permission of the GmSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the GmSSL Project
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* (http://gmssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE GmSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE GmSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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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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/*
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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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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_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]); // R = k * P + s * G
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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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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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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]); // 自动生成公钥
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int sm2_key_set_public_key(SM2_KEY *key, const SM2_POINT *public_key); // 自动清空私钥，不要和set_private_key同时用
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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);
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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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X.509 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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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_from_der(SM2_KEY *a, const uint8_t **in, size_t *inlen);
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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_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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int sm2_private_key_info_from_pem(SM2_KEY *key, const uint8_t **attrs, size_t *attrslen, 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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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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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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int sm2_private_key_info_encrypt_to_pem(const SM2_KEY *key, const char *pass, FILE *fp);
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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_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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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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#define SM2_MIN_SIGNATURE_SIZE 8
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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_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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SM2_KEY key;
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SM3_CTX sm3_ctx;
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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, size_t idlen);
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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, size_t idlen);
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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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/*
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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
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#define SM2_MAX_PLAINTEXT_SIZE 255 // re-compute SM2_MAX_CIPHERTEXT_SIZE when modify
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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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uint8_t ciphertext_size;
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uint8_t ciphertext[SM2_MAX_PLAINTEXT_SIZE];
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} SM2_CIPHERTEXT;
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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, int fmt, int ind, const char *label, const uint8_t *a, size_t alen);
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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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#define SM2_MIN_CIPHERTEXT_SIZE 45 // dependes on SM2_MIN_PLAINTEXT_SIZE
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#define SM2_MAX_CIPHERTEXT_SIZE 366 // depends on SM2_MAX_PLAINTEXT_SIZE
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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_ecdh(const SM2_KEY *key, const SM2_POINT *peer_public, SM2_POINT *out);
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int sm2_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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