132 lines
4.1 KiB
C
132 lines
4.1 KiB
C
/*
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* Copyright 2014-2022 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_SM4_H
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#define GMSSL_SM4_H
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#include <stdint.h>
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#include <string.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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SM4 Public API
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SM4_KEY_SIZE
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SM4_BLOCK_SIZE
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SM4_CBC_CTX
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sm4_cbc_encrypt_init
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sm4_cbc_encrypt_update
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sm4_cbc_encrypt_finish
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sm4_cbc_decrypt_init
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sm4_cbc_decrypt_update
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sm4_cbc_decrypt_finish
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SM4_CTR_CTX
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sm4_ctr_encrypt_init
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sm4_ctr_encrypt_update
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sm4_ctr_encrypt_finish
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sm4_ctr_decrypt_init
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sm4_ctr_decrypt_update
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sm4_ctr_decrypt_finish
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*/
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#define SM4_KEY_SIZE (16)
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#define SM4_BLOCK_SIZE (16)
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#define SM4_NUM_ROUNDS (32)
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typedef struct {
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uint32_t rk[SM4_NUM_ROUNDS];
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} SM4_KEY;
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void sm4_set_encrypt_key(SM4_KEY *key, const uint8_t raw_key[SM4_KEY_SIZE]);
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void sm4_set_decrypt_key(SM4_KEY *key, const uint8_t raw_key[SM4_KEY_SIZE]);
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void sm4_encrypt(const SM4_KEY *key, const uint8_t in[SM4_BLOCK_SIZE], uint8_t out[SM4_BLOCK_SIZE]);
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#define sm4_decrypt(key,in,out) sm4_encrypt(key,in,out)
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void sm4_cbc_encrypt(const SM4_KEY *key, const uint8_t iv[SM4_BLOCK_SIZE],
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const uint8_t *in, size_t nblocks, uint8_t *out);
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void sm4_cbc_decrypt(const SM4_KEY *key, const uint8_t iv[SM4_BLOCK_SIZE],
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const uint8_t *in, size_t nblocks, uint8_t *out);
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int sm4_cbc_padding_encrypt(const SM4_KEY *key, const uint8_t iv[SM4_BLOCK_SIZE],
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const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
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int sm4_cbc_padding_decrypt(const SM4_KEY *key, const uint8_t iv[SM4_BLOCK_SIZE],
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const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
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void sm4_ctr_encrypt(const SM4_KEY *key, uint8_t ctr[SM4_BLOCK_SIZE],
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const uint8_t *in, size_t inlen, uint8_t *out);
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#define sm4_ctr_decrypt(key,ctr,in,inlen,out) sm4_ctr_encrypt(key,ctr,in,inlen,out)
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#define SM4_GCM_IV_MIN_SIZE 1
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#define SM4_GCM_IV_MAX_SIZE ((uint64_t)(1 << (64-3)))
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#define SM4_GCM_IV_DEFAULT_BITS 96
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#define SM4_GCM_IV_DEFAULT_SIZE 12
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#define SM4_GCM_MIN_AAD_SIZE 0
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#define SM4_GCM_MAX_AAD_SIZE ((uint64_t)(1 << (64-3)))
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#define SM4_GCM_MIN_PLAINTEXT_SIZE 0
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#define SM4_GCM_MAX_PLAINTEXT_SIZE ((((uint64_t)1 << 39) - 256) >> 3)
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#define SM4_GCM_MAX_TAG_SIZE 16
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int sm4_gcm_encrypt(const SM4_KEY *key, const uint8_t *iv, size_t ivlen,
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const uint8_t *aad, size_t aadlen, const uint8_t *in, size_t inlen,
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uint8_t *out, size_t taglen, uint8_t *tag);
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int sm4_gcm_decrypt(const SM4_KEY *key, const uint8_t *iv, size_t ivlen,
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const uint8_t *aad, size_t aadlen, const uint8_t *in, size_t inlen,
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const uint8_t *tag, size_t taglen, uint8_t *out);
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typedef struct {
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SM4_KEY sm4_key;
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uint8_t iv[SM4_BLOCK_SIZE];
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uint8_t block[SM4_BLOCK_SIZE];
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size_t block_nbytes;
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} SM4_CBC_CTX;
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int sm4_cbc_encrypt_init(SM4_CBC_CTX *ctx, const uint8_t key[SM4_KEY_SIZE], const uint8_t iv[SM4_BLOCK_SIZE]);
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int sm4_cbc_encrypt_update(SM4_CBC_CTX *ctx, const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
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int sm4_cbc_encrypt_finish(SM4_CBC_CTX *ctx, uint8_t *out, size_t *outlen);
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int sm4_cbc_decrypt_init(SM4_CBC_CTX *ctx, const uint8_t key[SM4_KEY_SIZE], const uint8_t iv[SM4_BLOCK_SIZE]);
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int sm4_cbc_decrypt_update(SM4_CBC_CTX *ctx, const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
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int sm4_cbc_decrypt_finish(SM4_CBC_CTX *ctx, uint8_t *out, size_t *outlen);
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typedef struct {
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SM4_KEY sm4_key;
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uint8_t ctr[SM4_BLOCK_SIZE];
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uint8_t block[SM4_BLOCK_SIZE];
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size_t block_nbytes;
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} SM4_CTR_CTX;
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int sm4_ctr_encrypt_init(SM4_CTR_CTX *ctx, const uint8_t key[SM4_KEY_SIZE], const uint8_t ctr[SM4_BLOCK_SIZE]);
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int sm4_ctr_encrypt_update(SM4_CTR_CTX *ctx, const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
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int sm4_ctr_encrypt_finish(SM4_CTR_CTX *ctx, uint8_t *out, size_t *outlen);
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#define sm4_ctr_decrypt_init(ctx,key,ctr) sm4_ctr_encrypt_init(ctx,key,ctr)
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#define sm4_ctr_decrypt_update(ctx,in,inlen,out,outlen) sm4_ctr_encrypt_update(ctx,in,inlen,out,outlen)
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#define sm4_ctr_decrypt_finish(ctx,out,outlen) sm4_ctr_encrypt_finish(ctx,out,outlen)
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#ifdef __cplusplus
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}
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#endif
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#endif
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