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Add sm4_MODE_encrypt_blocks

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This commit is contained in:
Zhi Guan
2024-04-29 22:35:25 +08:00
parent 33c546f48a
commit 5cf6f2609e
10 changed files with 618 additions and 121 deletions
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62
src/sm4_cbc.c
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@@ -13,44 +13,6 @@
#include <gmssl/error.h>
void sm4_cbc_encrypt_blocks(const SM4_KEY *key, const uint8_t iv[16],
const uint8_t *in, size_t nblocks, uint8_t *out)
{
while (nblocks--) {
gmssl_memxor(out, in, iv, 16);
sm4_encrypt(key, out, out);
iv = out;
in += 16;
out += 16;
}
}
void sm4_cbc_decrypt_blocks(const SM4_KEY *key, const uint8_t iv[16],
const uint8_t *in, size_t nblocks, uint8_t *out)
{
while (nblocks >= 8) {
uint8_t buf[16 * 8];
sm4_encrypt_blocks(key, in, 8, buf);
gmssl_memxor(out, buf, iv, 16);
gmssl_memxor(out + 16, buf + 16, in, 16 * (8 - 1));
iv = in + 16 * (8 - 1);
in += 16 * 8;
out += 16 * 8;
nblocks -= 8;
}
while (nblocks--) {
sm4_encrypt(key, in, out);
memxor(out, iv, 16);
iv = in;
in += 16;
out += 16;
}
}
int sm4_cbc_padding_encrypt(const SM4_KEY *key, const uint8_t iv[16],
const uint8_t *in, size_t inlen,
uint8_t *out, size_t *outlen)
@@ -109,6 +71,10 @@ int sm4_cbc_padding_decrypt(const SM4_KEY *key, const uint8_t iv[16],
int sm4_cbc_encrypt_init(SM4_CBC_CTX *ctx,
const uint8_t key[SM4_BLOCK_SIZE], const uint8_t iv[SM4_BLOCK_SIZE])
{
if (!ctx || !key || !iv) {
error_print();
return -1;
}
sm4_set_encrypt_key(&ctx->sm4_key, key);
memcpy(ctx->iv, iv, SM4_BLOCK_SIZE);
memset(ctx->block, 0, SM4_BLOCK_SIZE);
@@ -123,6 +89,10 @@ int sm4_cbc_encrypt_update(SM4_CBC_CTX *ctx,
size_t nblocks;
size_t len;
if (!ctx || !in || !out || !outlen) {
error_print();
return -1;
}
if (ctx->block_nbytes >= SM4_BLOCK_SIZE) {
error_print();
return -1;
@@ -162,6 +132,10 @@ int sm4_cbc_encrypt_update(SM4_CBC_CTX *ctx,
int sm4_cbc_encrypt_finish(SM4_CBC_CTX *ctx, uint8_t *out, size_t *outlen)
{
if (!ctx || !out || !outlen) {
error_print();
return -1;
}
if (ctx->block_nbytes >= SM4_BLOCK_SIZE) {
error_print();
return -1;
@@ -176,6 +150,10 @@ int sm4_cbc_encrypt_finish(SM4_CBC_CTX *ctx, uint8_t *out, size_t *outlen)
int sm4_cbc_decrypt_init(SM4_CBC_CTX *ctx,
const uint8_t key[SM4_BLOCK_SIZE], const uint8_t iv[SM4_BLOCK_SIZE])
{
if (!ctx || !key || !iv) {
error_print();
return -1;
}
sm4_set_decrypt_key(&ctx->sm4_key, key);
memcpy(ctx->iv, iv, SM4_BLOCK_SIZE);
memset(ctx->block, 0, SM4_BLOCK_SIZE);
@@ -188,6 +166,10 @@ int sm4_cbc_decrypt_update(SM4_CBC_CTX *ctx,
{
size_t left, len, nblocks;
if (!ctx || !in || !out || !outlen) {
error_print();
return -1;
}
if (ctx->block_nbytes > SM4_BLOCK_SIZE) {
error_print();
return -1;
@@ -226,6 +208,10 @@ int sm4_cbc_decrypt_update(SM4_CBC_CTX *ctx,
int sm4_cbc_decrypt_finish(SM4_CBC_CTX *ctx, uint8_t *out, size_t *outlen)
{
if (!ctx || !out || !outlen) {
error_print();
return -1;
}
if (ctx->block_nbytes != SM4_BLOCK_SIZE) {
error_print();
return -1;