abc/GmSSL
1
0
Fork 0
mirror of https://github.com/guanzhi/GmSSL.git synced 2026-05-07 00:46:17 +08:00
Code Issues Packages Projects Releases Wiki Activity

AES GCM depends on CTR

Browse Source
This commit is contained in:
Zhi Guan
2024-04-12 10:27:08 +08:00
parent 8c1c69e264
commit 9fd4464980
3 changed files with 9 additions and 76 deletions
Download Patch File Download Diff File Expand all files Collapse all files

52
include/gmssl/gcm.h
View File

@@ -1,52 +0,0 @@
/*
* 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_GCM_H
#define GMSSL_GCM_H
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <gmssl/ghash.h>
#include <gmssl/block_cipher.h>
#ifdef __cplusplus
extern "C" {
#endif
#define GCM_IV_MIN_SIZE 1
#define GCM_IV_MAX_SIZE ((uint64_t)(1 << (64-3)))
#define GCM_IV_DEFAULT_BITS 96
#define GCM_IV_DEFAULT_SIZE 12
#define GCM_MIN_AAD_SIZE 0
#define GCM_MAX_AAD_SIZE ((uint64_t)(1 << (64-3)))
#define GCM_MIN_PLAINTEXT_SIZE 0
#define GCM_MAX_PLAINTEXT_SIZE ((((uint64_t)1 << 39) - 256) >> 3)
#define GCM_IS_LITTLE_ENDIAN 1
int gcm_encrypt(const BLOCK_CIPHER_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 gcm_decrypt(const BLOCK_CIPHER_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);
#ifdef __cplusplus
}
#endif
#endif

31
src/aes_modes.c
View File

@@ -1,5 +1,5 @@
/*
* Copyright 2014-2022 The GmSSL Project. All Rights Reserved.
* 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.
@@ -13,9 +13,9 @@
#include <string.h>
#include <stdlib.h>
#include <gmssl/aes.h>
#include <gmssl/gcm.h>
#include <gmssl/error.h>
#include <gmssl/mem.h>
#include <gmssl/ghash.h>
#include <gmssl/error.h>
void aes_cbc_encrypt(const AES_KEY *key, const uint8_t iv[16],
@@ -149,16 +149,8 @@ int aes_gcm_encrypt(const AES_KEY *key, const uint8_t *iv, size_t ivlen,
aes_encrypt(key, Y, T);
while (left) {
uint8_t block[16];
size_t len = left < 16 ? left : 16;
ctr_incr(Y);
aes_encrypt(key, Y, block);
gmssl_memxor(pout, pin, block, len);
pin += len;
pout += len;
left -= len;
}
ctr_incr(Y);
aes_ctr_encrypt(key, Y, in, inlen, out);
ghash(H, aad, aadlen, out, inlen, H);
gmssl_memxor(tag, T, H, taglen);
@@ -194,15 +186,8 @@ int aes_gcm_decrypt(const AES_KEY *key, const uint8_t *iv, size_t ivlen,
return -1;
}
while (left) {
uint8_t block[16];
size_t len = left < 16 ? left : 16;
ctr_incr(Y);
aes_encrypt(key, Y, block);
gmssl_memxor(pout, pin, block, len);
pin += len;
pout += len;
left -= len;
}
ctr_incr(Y);
aes_ctr_encrypt(key, Y, in, inlen, out);
return 1;
}

2
src/sm4_gcm.c
View File

@@ -10,7 +10,7 @@
#include <gmssl/sm4.h>
#include <gmssl/mem.h>
#include <gmssl/gcm.h>
#include <gmssl/ghash.h>
#include <gmssl/error.h>