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GmSSL/include/gmssl/sm4.h
Zhi Guan 8cb306ad0b Adjust SM3 SM4 API 
Remove sm3_digest. Use more _gmssl_export
2024-04-19 18:32:06 +08:00

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/*
* Copyright 2014-2024 The GmSSL Project. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the License); you may
* not use this file except in compliance with the License.
*
* http://www.apache.org/licenses/LICENSE-2.0
*/
#ifndef GMSSL_SM4_H
#define GMSSL_SM4_H
#include <stdint.h>
#include <string.h>
#include <gmssl/ghash.h>
#include <gmssl/api.h>
#ifdef __cplusplus
extern "C" {
#endif
#define SM4_KEY_SIZE (16)
#define SM4_BLOCK_SIZE (16)
#define SM4_NUM_ROUNDS (32)
typedef struct {
uint32_t rk[SM4_NUM_ROUNDS];
} SM4_KEY;
void sm4_set_encrypt_key(SM4_KEY *key, const uint8_t raw_key[SM4_KEY_SIZE]);
void sm4_set_decrypt_key(SM4_KEY *key, const uint8_t raw_key[SM4_KEY_SIZE]);
void sm4_encrypt(const SM4_KEY *key, const uint8_t in[SM4_BLOCK_SIZE], uint8_t out[SM4_BLOCK_SIZE]);
void sm4_cbc_encrypt(const SM4_KEY *key, const uint8_t iv[SM4_BLOCK_SIZE],
const uint8_t *in, size_t nblocks, uint8_t *out);
void sm4_cbc_decrypt(const SM4_KEY *key, const uint8_t iv[SM4_BLOCK_SIZE],
const uint8_t *in, size_t nblocks, uint8_t *out);
int sm4_cbc_padding_encrypt(const SM4_KEY *key, const uint8_t iv[SM4_BLOCK_SIZE],
const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
int sm4_cbc_padding_decrypt(const SM4_KEY *key, const uint8_t iv[SM4_BLOCK_SIZE],
const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
typedef struct {
union {
SM4_KEY sm4_key;
void *handle;
};
uint8_t iv[SM4_BLOCK_SIZE];
uint8_t block[SM4_BLOCK_SIZE];
size_t block_nbytes;
} SM4_CBC_CTX;
_gmssl_export int sm4_cbc_encrypt_init(SM4_CBC_CTX *ctx, const uint8_t key[SM4_KEY_SIZE], const uint8_t iv[SM4_BLOCK_SIZE]);
_gmssl_export int sm4_cbc_encrypt_update(SM4_CBC_CTX *ctx, const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
_gmssl_export int sm4_cbc_encrypt_finish(SM4_CBC_CTX *ctx, uint8_t *out, size_t *outlen);
_gmssl_export int sm4_cbc_decrypt_init(SM4_CBC_CTX *ctx, const uint8_t key[SM4_KEY_SIZE], const uint8_t iv[SM4_BLOCK_SIZE]);
_gmssl_export int sm4_cbc_decrypt_update(SM4_CBC_CTX *ctx, const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
_gmssl_export int sm4_cbc_decrypt_finish(SM4_CBC_CTX *ctx, uint8_t *out, size_t *outlen);
void sm4_ctr_encrypt(const SM4_KEY *key, uint8_t ctr[SM4_BLOCK_SIZE],
const uint8_t *in, size_t inlen, uint8_t *out);
typedef struct {
union {
SM4_KEY sm4_key;
void *handle;
};
uint8_t ctr[SM4_BLOCK_SIZE];
uint8_t block[SM4_BLOCK_SIZE];
size_t block_nbytes;
} SM4_CTR_CTX;
_gmssl_export int sm4_ctr_encrypt_init(SM4_CTR_CTX *ctx, const uint8_t key[SM4_KEY_SIZE], const uint8_t ctr[SM4_BLOCK_SIZE]);
_gmssl_export int sm4_ctr_encrypt_update(SM4_CTR_CTX *ctx, const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
_gmssl_export int sm4_ctr_encrypt_finish(SM4_CTR_CTX *ctx, uint8_t *out, size_t *outlen);
#define NIST_SP800_GCM_MAX_IV_SIZE (((uint64_t)1 << (64-3)) - 1) // 2305843009213693951
#define SM4_GCM_MAX_IV_SIZE 64
#define SM4_GCM_MIN_IV_SIZE 1
#define SM4_GCM_DEFAULT_IV_SIZE 12
#define NIST_SP800_GCM_MAX_AAD_SIZE (((uint64_t)1 << (64-3)) - 1) // 2305843009213693951
#define SM4_GCM_MIN_AAD_SIZE 0
#define SM4_GCM_MAX_AAD_SIZE (1<<24) // 16MiB
#define SM4_GCM_MIN_PLAINTEXT_SIZE 0
#define SM4_GCM_MAX_PLAINTEXT_SIZE ((((uint64_t)1 << 39) - 256) >> 3) // 68719476704
#define SM4_GCM_MAX_TAG_SIZE 16
#define SM4_GCM_MIN_TAG_SIZE 12
#define SM4_GCM_DEFAULT_TAG_SIZE 16
// For certain applications (voice or video), tag may be 64 or 32 bits
// see NIST Special Publication 800-38D, Appendix C for more details
int sm4_gcm_encrypt(const SM4_KEY *key, const uint8_t *iv, size_t ivlen,
const uint8_t *aad, size_t aadlen, const uint8_t *in, size_t inlen,
uint8_t *out, size_t taglen, uint8_t *tag);
int sm4_gcm_decrypt(const SM4_KEY *key, const uint8_t *iv, size_t ivlen,
const uint8_t *aad, size_t aadlen, const uint8_t *in, size_t inlen,
const uint8_t *tag, size_t taglen, uint8_t *out);
typedef struct {
SM4_CTR_CTX enc_ctx;
GHASH_CTX mac_ctx;
uint8_t Y[16]; // E(K, Y_0)
size_t taglen;
uint8_t mac[16];
size_t maclen;
} SM4_GCM_CTX;
_gmssl_export int sm4_gcm_encrypt_init(SM4_GCM_CTX *ctx,
const uint8_t *key, size_t keylen, const uint8_t *iv, size_t ivlen,
const uint8_t *aad, size_t aadlen, size_t taglen);
_gmssl_export int sm4_gcm_encrypt_update(SM4_GCM_CTX *ctx,
const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
_gmssl_export int sm4_gcm_encrypt_finish(SM4_GCM_CTX *ctx,
uint8_t *out, size_t *outlen);
_gmssl_export int sm4_gcm_decrypt_init(SM4_GCM_CTX *ctx,
const uint8_t *key, size_t keylen, const uint8_t *iv, size_t ivlen,
const uint8_t *aad, size_t aadlen, size_t taglen);
_gmssl_export int sm4_gcm_decrypt_update(SM4_GCM_CTX *ctx,
const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
_gmssl_export int sm4_gcm_decrypt_finish(SM4_GCM_CTX *ctx,
uint8_t *out, size_t *outlen);
#ifdef ENABLE_SM4_ECB
// call `sm4_set_decrypt_key` before decrypt
void sm4_ecb_encrypt(const SM4_KEY *key, const uint8_t *in, size_t nblocks, uint8_t *out);
typedef struct {
SM4_KEY sm4_key;
uint8_t block[SM4_BLOCK_SIZE];
size_t block_nbytes;
} SM4_ECB_CTX;
int sm4_ecb_encrypt_init(SM4_ECB_CTX *ctx, const uint8_t key[SM4_BLOCK_SIZE]);
int sm4_ecb_encrypt_update(SM4_ECB_CTX *ctx,
const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
int sm4_ecb_encrypt_finish(SM4_ECB_CTX *ctx, uint8_t *out, size_t *outlen);
int sm4_ecb_decrypt_init(SM4_ECB_CTX *ctx, const uint8_t key[SM4_BLOCK_SIZE]);
int sm4_ecb_decrypt_update(SM4_ECB_CTX *ctx,
const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
int sm4_ecb_decrypt_finish(SM4_ECB_CTX *ctx, uint8_t *out, size_t *outlen);
#endif // ENABLE_SM4_ECB
#ifdef ENABLE_SM4_OFB
// always call `sm4_set_encrypt_key` before encrypt/decrypt
// `sm4_ofb_encrypt` will change the param `iv`
void sm4_ofb_encrypt(const SM4_KEY *key, uint8_t iv[16], const uint8_t *in, size_t inlen, uint8_t *out);
typedef struct {
SM4_KEY sm4_key;
uint8_t iv[SM4_BLOCK_SIZE];
uint8_t block[SM4_BLOCK_SIZE];
size_t block_nbytes;
} SM4_OFB_CTX;
_gmssl_export int sm4_ofb_encrypt_init(SM4_OFB_CTX *ctx,
const uint8_t key[SM4_BLOCK_SIZE], const uint8_t iv[SM4_BLOCK_SIZE]);
_gmssl_export int sm4_ofb_encrypt_update(SM4_OFB_CTX *ctx,
const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
_gmssl_export int sm4_ofb_encrypt_finish(SM4_OFB_CTX *ctx, uint8_t *out, size_t *outlen);
#endif // ENABLE_SM4_OFB
#ifdef ENABLE_SM4_CFB
#define SM4_CFB_MIN_SBYTES 1
#define SM4_CFB_MAX_SBYTES 16
// always call `sm4_set_encrypt_key` before encrypt/decrypt
// `sm4_cfb_encrypt/decrypt` will change the param `iv`
void sm4_cfb_encrypt(const SM4_KEY *key, size_t sbytes, uint8_t iv[16],
const uint8_t *in, size_t inlen, uint8_t *out);
void sm4_cfb_decrypt(const SM4_KEY *key, size_t sbytes, uint8_t iv[16],
const uint8_t *in, size_t inlen, uint8_t *out);
typedef struct {
SM4_KEY sm4_key;
uint8_t iv[SM4_BLOCK_SIZE];
uint8_t block[SM4_BLOCK_SIZE];
size_t block_nbytes;
size_t sbytes;
} SM4_CFB_CTX;
_gmssl_export int sm4_cfb_encrypt_init(SM4_CFB_CTX *ctx, size_t sbytes,
const uint8_t key[SM4_BLOCK_SIZE], const uint8_t iv[SM4_BLOCK_SIZE]);
_gmssl_export int sm4_cfb_encrypt_update(SM4_CFB_CTX *ctx,
const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
_gmssl_export int sm4_cfb_encrypt_finish(SM4_CFB_CTX *ctx, uint8_t *out, size_t *outlen);
_gmssl_export int sm4_cfb_decrypt_init(SM4_CFB_CTX *ctx, size_t sbytes,
const uint8_t key[SM4_BLOCK_SIZE], const uint8_t iv[SM4_BLOCK_SIZE]);
_gmssl_export int sm4_cfb_decrypt_update(SM4_CFB_CTX *ctx,
const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
_gmssl_export int sm4_cfb_decrypt_finish(SM4_CFB_CTX *ctx, uint8_t *out, size_t *outlen);
#endif // ENABLE_SM4_CFB
#ifdef ENABLE_SM4_CCM
#define SM4_CCM_MIN_IV_SIZE 7
#define SM4_CCM_MAX_IV_SIZE 13
#define SM4_CCM_MIN_MAC_SIZE 4
#define SM4_CCM_MAX_MAC_SIZE 16
// make sure inlen < 2^((15 - ivlen) * 8)
_gmssl_export int sm4_ccm_encrypt(const SM4_KEY *sm4_key, const uint8_t *iv, size_t ivlen,
const uint8_t *aad, size_t aadlen, const uint8_t *in, size_t inlen,
uint8_t *out, size_t taglen, uint8_t *tag);
_gmssl_export int sm4_ccm_decrypt(const SM4_KEY *sm4_key, const uint8_t *iv, size_t ivlen,
const uint8_t *aad, size_t aadlen, const uint8_t *in, size_t inlen,
const uint8_t *tag, size_t taglen, uint8_t *out);
#endif // ENABLE_SM4_CCM
#ifdef ENABLE_SM4_XTS
// call `sm4_set_encrypt_key` to set both `key1` and `key2`
_gmssl_export int sm4_xts_encrypt(const SM4_KEY *key1, const SM4_KEY *key2, const uint8_t tweak[16],
const uint8_t *in, size_t inlen, uint8_t *out);
// call `sm4_set_decrypt_key(key1)` and `sm4_set_encrypt_key(key2)`
_gmssl_export int sm4_xts_decrypt(const SM4_KEY *key1, const SM4_KEY *key2, const uint8_t tweak[16],
const uint8_t *in, size_t inlen, uint8_t *out);
typedef struct {
SM4_KEY key1;
SM4_KEY key2;
uint8_t tweak[16];
size_t data_unit_size;
uint8_t *block;
size_t block_nbytes;
} SM4_XTS_CTX;
_gmssl_export int sm4_xts_encrypt_init(SM4_XTS_CTX *ctx, const uint8_t key[32], const uint8_t iv[16], size_t data_unit_size);
_gmssl_export int sm4_xts_encrypt_update(SM4_XTS_CTX *ctx, const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
_gmssl_export int sm4_xts_encrypt_finish(SM4_XTS_CTX *ctx, uint8_t *out, size_t *outlen);
_gmssl_export int sm4_xts_decrypt_init(SM4_XTS_CTX *ctx, const uint8_t key[32], const uint8_t iv[16], size_t data_unit_size);
_gmssl_export int sm4_xts_decrypt_update(SM4_XTS_CTX *ctx, const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
_gmssl_export int sm4_xts_decrypt_finish(SM4_XTS_CTX *ctx, uint8_t *out, size_t *outlen);
#endif // ENABLE_SM4_XTS
#ifdef __cplusplus
}
#endif
#endif
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