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Update SM4 API

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This commit is contained in:
Zhi Guan
2024-04-27 12:08:35 +08:00
parent 3f1fdc147a
commit bc15f7a0c7
8 changed files with 157 additions and 113 deletions
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89
src/sm4_ctr.c
View File

@@ -100,3 +100,92 @@ int sm4_ctr_encrypt_finish(SM4_CTR_CTX *ctx, uint8_t *out, size_t *outlen)
*outlen = ctx->block_nbytes;
return 1;
}
// inc32() in nist-sp800-38d
static void ctr32_incr(uint8_t a[16])
{
int i;
for (i = 15; i >= 12; i--) {
a[i]++;
if (a[i]) break;
}
}
void sm4_ctr32_encrypt(const SM4_KEY *key, uint8_t ctr[16], const uint8_t *in, size_t inlen, uint8_t *out)
{
uint8_t block[16];
size_t len;
while (inlen) {
len = inlen < 16 ? inlen : 16;
sm4_encrypt(key, ctr, block);
gmssl_memxor(out, in, block, len);
ctr32_incr(ctr);
in += len;
out += len;
inlen -= len;
}
}
int sm4_ctr32_encrypt_init(SM4_CTR_CTX *ctx,
const uint8_t key[SM4_BLOCK_SIZE], const uint8_t ctr[SM4_BLOCK_SIZE])
{
sm4_set_encrypt_key(&ctx->sm4_key, key);
memcpy(ctx->ctr, ctr, SM4_BLOCK_SIZE);
memset(ctx->block, 0, SM4_BLOCK_SIZE);
ctx->block_nbytes = 0;
return 1;
}
int sm4_ctr32_encrypt_update(SM4_CTR_CTX *ctx,
const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen)
{
size_t left;
size_t nblocks;
size_t len;
if (ctx->block_nbytes >= SM4_BLOCK_SIZE) {
error_print();
return -1;
}
*outlen = 0;
if (ctx->block_nbytes) {
left = SM4_BLOCK_SIZE - ctx->block_nbytes;
if (inlen < left) {
memcpy(ctx->block + ctx->block_nbytes, in, inlen);
ctx->block_nbytes += inlen;
return 1;
}
memcpy(ctx->block + ctx->block_nbytes, in, left);
sm4_ctr32_encrypt(&ctx->sm4_key, ctx->ctr, ctx->block, SM4_BLOCK_SIZE, out);
in += left;
inlen -= left;
out += SM4_BLOCK_SIZE;
*outlen += SM4_BLOCK_SIZE;
}
if (inlen >= SM4_BLOCK_SIZE) {
nblocks = inlen / SM4_BLOCK_SIZE;
len = nblocks * SM4_BLOCK_SIZE;
sm4_ctr32_encrypt(&ctx->sm4_key, ctx->ctr, in, len, out);
in += len;
inlen -= len;
out += len;
*outlen += len;
}
if (inlen) {
memcpy(ctx->block, in, inlen);
}
ctx->block_nbytes = inlen;
return 1;
}
int sm4_ctr32_encrypt_finish(SM4_CTR_CTX *ctx, uint8_t *out, size_t *outlen)
{
if (ctx->block_nbytes >= SM4_BLOCK_SIZE) {
error_print();
return -1;
}
sm4_ctr32_encrypt(&ctx->sm4_key, ctx->ctr, ctx->block, ctx->block_nbytes, out);
*outlen = ctx->block_nbytes;
return 1;
}

6
src/sm4_ecb.c
View File

@@ -13,7 +13,7 @@
#include <gmssl/error.h>
void sm4_ecb_encrypt(const SM4_KEY *key, const uint8_t *in, size_t nblocks, uint8_t *out)
void sm4_ecb_encrypt_blocks(const SM4_KEY *key, const uint8_t *in, size_t nblocks, uint8_t *out)
{
while (nblocks--) {
sm4_encrypt(key, in, out);
@@ -50,7 +50,7 @@ int sm4_ecb_encrypt_update(SM4_ECB_CTX *ctx,
return 1;
}
memcpy(ctx->block + ctx->block_nbytes, in, left);
sm4_ecb_encrypt(&ctx->sm4_key, ctx->block, 1, out);
sm4_ecb_encrypt_blocks(&ctx->sm4_key, ctx->block, 1, out);
in += left;
inlen -= left;
out += SM4_BLOCK_SIZE;
@@ -59,7 +59,7 @@ int sm4_ecb_encrypt_update(SM4_ECB_CTX *ctx,
if (inlen >= SM4_BLOCK_SIZE) {
nblocks = inlen / SM4_BLOCK_SIZE;
len = nblocks * SM4_BLOCK_SIZE;
sm4_ecb_encrypt(&ctx->sm4_key, in, nblocks, out);
sm4_ecb_encrypt_blocks(&ctx->sm4_key, in, nblocks, out);
in += len;
inlen -= len;
out += len;

79
src/sm4_gcm.c
View File

@@ -25,22 +25,6 @@ static void ctr32_incr(uint8_t a[16])
}
}
static void sm4_ctr32_encrypt(const SM4_KEY *key, uint8_t ctr[16], const uint8_t *in, size_t inlen, uint8_t *out)
{
uint8_t block[16];
size_t len;
while (inlen) {
len = inlen < 16 ? inlen : 16;
sm4_encrypt(key, ctr, block);
gmssl_memxor(out, in, block, len);
ctr32_incr(ctr);
in += len;
out += len;
inlen -= len;
}
}
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)
@@ -108,69 +92,6 @@ int sm4_gcm_decrypt(const SM4_KEY *key, const uint8_t *iv, size_t ivlen,
return 1;
}
static int sm4_ctr32_encrypt_init(SM4_CTR_CTX *ctx,
const uint8_t key[SM4_BLOCK_SIZE], const uint8_t ctr[SM4_BLOCK_SIZE])
{
sm4_set_encrypt_key(&ctx->sm4_key, key);
memcpy(ctx->ctr, ctr, SM4_BLOCK_SIZE);
memset(ctx->block, 0, SM4_BLOCK_SIZE);
ctx->block_nbytes = 0;
return 1;
}
static int sm4_ctr32_encrypt_update(SM4_CTR_CTX *ctx,
const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen)
{
size_t left;
size_t nblocks;
size_t len;
if (ctx->block_nbytes >= SM4_BLOCK_SIZE) {
error_print();
return -1;
}
*outlen = 0;
if (ctx->block_nbytes) {
left = SM4_BLOCK_SIZE - ctx->block_nbytes;
if (inlen < left) {
memcpy(ctx->block + ctx->block_nbytes, in, inlen);
ctx->block_nbytes += inlen;
return 1;
}
memcpy(ctx->block + ctx->block_nbytes, in, left);
sm4_ctr32_encrypt(&ctx->sm4_key, ctx->ctr, ctx->block, SM4_BLOCK_SIZE, out);
in += left;
inlen -= left;
out += SM4_BLOCK_SIZE;
*outlen += SM4_BLOCK_SIZE;
}
if (inlen >= SM4_BLOCK_SIZE) {
nblocks = inlen / SM4_BLOCK_SIZE;
len = nblocks * SM4_BLOCK_SIZE;
sm4_ctr32_encrypt(&ctx->sm4_key, ctx->ctr, in, len, out);
in += len;
inlen -= len;
out += len;
*outlen += len;
}
if (inlen) {
memcpy(ctx->block, in, inlen);
}
ctx->block_nbytes = inlen;
return 1;
}
static int sm4_ctr32_encrypt_finish(SM4_CTR_CTX *ctx, uint8_t *out, size_t *outlen)
{
if (ctx->block_nbytes >= SM4_BLOCK_SIZE) {
error_print();
return -1;
}
sm4_ctr32_encrypt(&ctx->sm4_key, ctx->ctr, ctx->block, ctx->block_nbytes, out);
*outlen = ctx->block_nbytes;
return 1;
}
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)