abc/GmSSL
1
0
Fork 0
mirror of https://github.com/guanzhi/GmSSL.git synced 2026-05-07 08:56:17 +08:00
Code Issues Packages Projects Releases Wiki Activity

Update SM4 CBC API

Browse Source
This commit is contained in:
Zhi Guan
2024-04-28 17:27:41 +08:00
parent 660b4cfc53
commit 6e8a36c738
4 changed files with 19 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
src/sm4_cbc.c
View File

@@ -12,7 +12,8 @@
#include <gmssl/mem.h>
#include <gmssl/error.h>
void sm4_cbc_encrypt(const SM4_KEY *key, const uint8_t iv[16],
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--) {
@@ -24,7 +25,7 @@ void sm4_cbc_encrypt(const SM4_KEY *key, const uint8_t iv[16],
}
}
void sm4_cbc_decrypt(const SM4_KEY *key, const uint8_t iv[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) {
@@ -63,11 +64,11 @@ int sm4_cbc_padding_encrypt(const SM4_KEY *key, const uint8_t iv[16],
}
memset(block + rem, padding, padding);
if (inlen/16) {
sm4_cbc_encrypt(key, iv, in, inlen/16, out);
sm4_cbc_encrypt_blocks(key, iv, in, inlen/16, out);
out += inlen - rem;
iv = out - 16;
}
sm4_cbc_encrypt(key, iv, block, 1, out);
sm4_cbc_encrypt_blocks(key, iv, block, 1, out);
*outlen = inlen - rem + 16;
return 1;
}
@@ -89,10 +90,10 @@ int sm4_cbc_padding_decrypt(const SM4_KEY *key, const uint8_t iv[16],
return -1;
}
if (inlen > 16) {
sm4_cbc_decrypt(key, iv, in, inlen/16 - 1, out);
sm4_cbc_decrypt_blocks(key, iv, in, inlen/16 - 1, out);
iv = in + inlen - 32;
}
sm4_cbc_decrypt(key, iv, in + inlen - 16, 1, block);
sm4_cbc_decrypt_blocks(key, iv, in + inlen - 16, 1, block);
padding = block[15];
if (padding < 1 || padding > 16) {
@@ -135,7 +136,7 @@ int sm4_cbc_encrypt_update(SM4_CBC_CTX *ctx,
return 1;
}
memcpy(ctx->block + ctx->block_nbytes, in, left);
sm4_cbc_encrypt(&ctx->sm4_key, ctx->iv, ctx->block, 1, out);
sm4_cbc_encrypt_blocks(&ctx->sm4_key, ctx->iv, ctx->block, 1, out);
memcpy(ctx->iv, out, SM4_BLOCK_SIZE);
in += left;
inlen -= left;
@@ -145,7 +146,7 @@ int sm4_cbc_encrypt_update(SM4_CBC_CTX *ctx,
if (inlen >= SM4_BLOCK_SIZE) {
nblocks = inlen / SM4_BLOCK_SIZE;
len = nblocks * SM4_BLOCK_SIZE;
sm4_cbc_encrypt(&ctx->sm4_key, ctx->iv, in, nblocks, out);
sm4_cbc_encrypt_blocks(&ctx->sm4_key, ctx->iv, in, nblocks, out);
memcpy(ctx->iv, out + len - SM4_BLOCK_SIZE, SM4_BLOCK_SIZE);
in += len;
inlen -= len;
@@ -201,7 +202,7 @@ int sm4_cbc_decrypt_update(SM4_CBC_CTX *ctx,
return 1;
}
memcpy(ctx->block + ctx->block_nbytes, in, left);
sm4_cbc_decrypt(&ctx->sm4_key, ctx->iv, ctx->block, 1, out);
sm4_cbc_decrypt_blocks(&ctx->sm4_key, ctx->iv, ctx->block, 1, out);
memcpy(ctx->iv, ctx->block, SM4_BLOCK_SIZE);
in += left;
inlen -= left;
@@ -211,7 +212,7 @@ int sm4_cbc_decrypt_update(SM4_CBC_CTX *ctx,
if (inlen > SM4_BLOCK_SIZE) {
nblocks = (inlen-1) / SM4_BLOCK_SIZE;
len = nblocks * SM4_BLOCK_SIZE;
sm4_cbc_decrypt(&ctx->sm4_key, ctx->iv, in, nblocks, out);
sm4_cbc_decrypt_blocks(&ctx->sm4_key, ctx->iv, in, nblocks, out);
memcpy(ctx->iv, in + len - SM4_BLOCK_SIZE, SM4_BLOCK_SIZE);
in += len;
inlen -= len;

6
src/tls.c
View File

@@ -312,11 +312,11 @@ int tls_cbc_encrypt(const SM3_HMAC_CTX *inited_hmac_ctx, const SM4_KEY *enc_key,
out += 16;
if (inlen >= 16) {
sm4_cbc_encrypt(enc_key, iv, in, inlen/16, out);
sm4_cbc_encrypt_blocks(enc_key, iv, in, inlen/16, out);
out += inlen - rem;
iv = out - 16;
}
sm4_cbc_encrypt(enc_key, iv, last_blocks, sizeof(last_blocks)/16, out);
sm4_cbc_encrypt_blocks(enc_key, iv, last_blocks, sizeof(last_blocks)/16, out);
*outlen = 16 + inlen - rem + sizeof(last_blocks);
return 1;
}
@@ -349,7 +349,7 @@ int tls_cbc_decrypt(const SM3_HMAC_CTX *inited_hmac_ctx, const SM4_KEY *dec_key,
in += 16;
inlen -= 16;
sm4_cbc_decrypt(dec_key, iv, in, inlen/16, out);
sm4_cbc_decrypt_blocks(dec_key, iv, in, inlen/16, out);
padding_len = out[inlen - 1];
padding = out + inlen - padding_len - 1;