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e4502ddd24c376c45d9b4df3d25555728c43b2a6
GmSSL/tools/sm4.c
Zhi Guan e4502ddd24 XTS use new GF(2^128) API
2024-04-11 18:02:46 +08:00

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/*
* Copyright 2014-2023 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
*/
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <gmssl/mem.h>
#include <gmssl/sm4.h>
#include <gmssl/hex.h>
#include <gmssl/aead.h>
#include <gmssl/error.h>
enum {
SM4_MODE_ECB = 1,
SM4_MODE_CBC,
SM4_MODE_CFB,
SM4_MODE_OFB,
SM4_MODE_CTR,
SM4_MODE_XTS,
SM4_MODE_CCM,
SM4_MODE_GCM,
SM4_MODE_CBC_SM3_HMAC,
SM4_MODE_CTR_SM3_HMAC,
};
static uint8_t *read_content(FILE *infp, size_t *outlen, const char *prog)
{
const size_t INITIAL_BUFFER_SIZE = 4096;
const size_t MAX_BUFFER_SIZE = 512 * 1024 * 1024;
uint8_t *buffer = NULL;
size_t buffer_size = INITIAL_BUFFER_SIZE;
size_t total_read = 0;
if (!(buffer = (uint8_t *)malloc(INITIAL_BUFFER_SIZE))) {
fprintf(stderr, "%s: malloc failure\n", prog);
return NULL;
}
while (1) {
size_t bytes_read;
if (total_read == buffer_size) {
uint8_t *new_buffer;
if (buffer_size >= MAX_BUFFER_SIZE) {
fprintf(stderr, "%s: input too long, should be less than %zu\n", prog, MAX_BUFFER_SIZE);
free(buffer);
return NULL;
}
buffer_size = buffer_size * 2;
if (buffer_size > MAX_BUFFER_SIZE) {
buffer_size = MAX_BUFFER_SIZE;
}
if (!(new_buffer = (uint8_t *)realloc(buffer, buffer_size))) {
fprintf(stderr, "%s: realloc failure\n", prog);
free(buffer);
return NULL;
}
buffer = new_buffer;
}
bytes_read = fread(buffer + total_read, 1, buffer_size - total_read, infp);
total_read += bytes_read;
if (feof(infp)) {
break;
}
if (ferror(infp)) {
fprintf(stderr, "%s: fread error\n", prog);
perror("error reading input");
free(buffer);
return NULL;
}
}
*outlen = total_read;
return buffer;
}
#ifdef ENABLE_SM4_CCM
static int sm4_ccm_crypt(const uint8_t *key, size_t keylen, const uint8_t *iv, size_t ivlen,
const uint8_t *aad, size_t aadlen, size_t taglen, FILE *infp, FILE *outfp, int enc,
const char *prog)
{
int ret = -1;
SM4_KEY sm4_key;
uint8_t *inbuf = NULL;
uint8_t *outbuf = NULL;
size_t inlen, outlen;
uint8_t *tag;
if (keylen != 16) {
error_print();
return -1;
}
if (ivlen < SM4_CCM_MIN_IV_SIZE || ivlen > SM4_CCM_MAX_IV_SIZE) {
fprintf(stderr, "%s: invalid SM4-CCM IV length, should be in [%d, %d]\n",
prog, SM4_CCM_MIN_IV_SIZE, SM4_CCM_MAX_IV_SIZE);
return -1;
}
if (taglen < SM4_CCM_MIN_MAC_SIZE || taglen > SM4_CCM_MAX_MAC_SIZE) {
fprintf(stderr, "%s: invalid SM4-CCM MAC tag length, should be in [%d, %d]\n",
prog, SM4_CCM_MIN_MAC_SIZE, SM4_CCM_MAX_MAC_SIZE);
return -1;
}
if (enc < 0) {
error_print();
return -1;
}
sm4_set_encrypt_key(&sm4_key, key);
if (!(inbuf = read_content(infp, &inlen, prog))) {
goto end;
}
if (enc) {
outlen = inlen + taglen;
if (!(outbuf = (uint8_t *)malloc(outlen))) {
fprintf(stderr, "%s: malloc failure\n", prog);
goto end;
}
tag = outbuf + inlen;
if (sm4_ccm_encrypt(&sm4_key, iv, ivlen, aad, aadlen, inbuf, inlen, outbuf, taglen, tag) != 1) {
error_print();
goto end;
}
} else {
if (inlen < taglen) {
fprintf(stderr, "%s: input length (%zu bytes) shorter than tag length (%zu bytes)\n",
prog, inlen, taglen);
goto end;
}
outlen = inlen - taglen;
tag = inbuf + inlen - taglen;
if (!(outbuf = (uint8_t *)malloc(outlen))) {
fprintf(stderr, "%s: malloc failure\n", prog);
goto end;
}
if (sm4_ccm_decrypt(&sm4_key, iv, ivlen, aad, aadlen, inbuf, inlen - taglen,
tag, taglen, outbuf) != 1) {
error_print();
goto end;
}
}
if (fwrite(outbuf, 1, outlen, outfp) != outlen) {
fprintf(stderr, "%s: fwrite error\n", prog);
goto end;
}
ret = 1;
end:
gmssl_secure_clear(&sm4_key, sizeof(sm4_key));
if (inbuf) free(inbuf);
if (outbuf) free(outbuf);
return ret;
}
#endif
static const char *usage =
"(-cbc|-ctr|-gcm|-cbc_sm3_hmac|-ctr_sm3_hmac)"
" {-encrypt|-decrypt} -key hex -iv hex"
" [-aad str| -aad_hex hex] [-taglen num] [-in file] [-out file]";
static const char *options =
"Options\n"
"\n"
" Modes\n"
"\n"
" -ecb ECB mode\n"
" -cbc CBC mode with padding, need 16-byte key and 16-byte iv\n"
" -cfb CFB mode with padding, need 16-byte key and 16-byte iv\n"
" -ofb OFB mode with padding, need 16-byte key and 16-byte iv\n"
" -ctr CTR mode, need 16-byte key and 16-byte iv\n"
" -ccm CCM mode, need 16-byte key and any iv length\n"
" -gcm GCM mode, need 16-byte key and any iv length\n"
" -cbc_sm3_hmac CBC mode with padding and HMAC-SM3 (encrypt-then-mac), need 48-byte key and 16-byte iv\n"
" -ctr_sm3_hmac CTR mode with HMAC-SM3 (entrypt-then-mac), need 48-byte key and 16-byte iv\n"
" -xts XTS mode\n"
"\n"
" -encrypt Encrypt\n"
" -decrypt Decrypt\n"
" -key hex Symmetric key in HEX format\n"
" -iv hex IV in HEX format\n"
" -aad str Authenticated-only message\n"
" -aad_hex hex Authenticated-only data in HEX format\n"
" -in file | stdin Input data\n"
" -out file | stdout Output data\n"
"\n"
"Examples"
"\n"
" echo \"hello\" | gmssl sm4 -gcm -encrypt -key 11223344556677881122334455667788 -iv 112233445566778811223344 -out ciphertext.bin\n"
" gmssl sm4 -gcm -decrypt -key 11223344556677881122334455667788 -iv 112233445566778811223344 -in ciphertext.bin\n"
"\n"
" echo \"hello\" | gmssl sm4 -cbc_sm3_hmac -encrypt \\\n"
" -key 112233445566778811223344556677881122334455667788112233445566778811223344556677881122334455667788 \\\n"
" -iv 11223344556677881122334455667788 -out ciphertext.bin\n"
" gmssl sm4 -cbc_sm3_hmac -decrypt \\\n"
" -key 112233445566778811223344556677881122334455667788112233445566778811223344556677881122334455667788 \\\n"
" -iv 11223344556677881122334455667788 -in ciphertext.bin\n"
"\n";
int sm4_main(int argc, char **argv)
{
int ret = 1;
char *prog = argv[0];
char *keyhex = NULL;
char *ivhex = NULL;
uint8_t *aad = NULL;
uint8_t *aad_buf = NULL;
size_t aadlen = 0;
char *infile = NULL;
char *outfile = NULL;
uint8_t key[48];
uint8_t iv[SM4_GCM_MAX_IV_SIZE];
size_t keylen = 0;
size_t ivlen = 0;
FILE *infp = stdin;
FILE *outfp = stdout;
int mode = 0;
int enc = -1;
int rv;
union {
#ifdef ENABLE_SM4_ECB
SM4_ECB_CTX ecb;
#endif
SM4_CBC_CTX cbc;
#ifdef ENABLE_SM4_CFB
SM4_CFB_CTX cfb;
#endif
#ifdef ENABLE_SM4_OFB
SM4_OFB_CTX ofb;
#endif
SM4_CTR_CTX ctr;
#ifdef ENABLE_SM4_XTS
SM4_XTS_CTX xts;
#endif
SM4_GCM_CTX gcm;
SM4_CBC_SM3_HMAC_CTX cbc_sm3_hmac;
SM4_CTR_SM3_HMAC_CTX ctr_sm3_hmac;
} sm4_ctx;
uint8_t inbuf[4096];
size_t inlen;
uint8_t outbuf[41960];
size_t outlen;
int taglen = -1;
int xts_data_unit_size = 0;
argc--;
argv++;
if (argc < 1) {
fprintf(stderr, "usage: %s %s\n", prog, usage);
return 1;
}
while (argc > 0) {
if (!strcmp(*argv, "-help")) {
printf("usage: %s %s\n", prog, usage);
printf("%s\n", options);
ret = 0;
goto end;
} else if (!strcmp(*argv, "-key")) {
if (--argc < 1) goto bad;
keyhex = *(++argv);
if (strlen(keyhex) > sizeof(key) * 2) {
fprintf(stderr, "%s: invalid key length\n", prog);
goto end;
}
if (hex_to_bytes(keyhex, strlen(keyhex), key, &keylen) != 1) {
fprintf(stderr, "%s: invalid key hex digits\n", prog);
goto end;
}
} else if (!strcmp(*argv, "-iv")) {
if (--argc < 1) goto bad;
ivhex = *(++argv);
if (strlen(ivhex) > sizeof(iv) * 2) {
fprintf(stderr, "%s: IV length too long\n", prog);
goto end;
}
if (hex_to_bytes(ivhex, strlen(ivhex), iv, &ivlen) != 1) {
fprintf(stderr, "%s: invalid IV hex digits\n", prog);
goto end;
}
} else if (!strcmp(*argv, "-encrypt")) {
if (enc == 0) {
fprintf(stderr, "%s: `-encrypt` `-decrypt` should not be used together\n", prog);
goto end;
}
enc = 1;
} else if (!strcmp(*argv, "-decrypt")) {
if (enc == 1) {
fprintf(stderr, "%s: `-encrypt` `-decrypt` should not be used together\n", prog);
goto end;
}
enc = 0;
} else if (!strcmp(*argv, "-cbc")) {
if (mode) goto bad;
mode = SM4_MODE_CBC;
} else if (!strcmp(*argv, "-ctr")) {
if (mode) goto bad;
mode = SM4_MODE_CTR;
} else if (!strcmp(*argv, "-cbc_sm3_hmac")) {
if (mode) goto bad;
mode = SM4_MODE_CBC_SM3_HMAC;
} else if (!strcmp(*argv, "-ctr_sm3_hmac")) {
if (mode) goto bad;
mode = SM4_MODE_CTR_SM3_HMAC;
} else if (!strcmp(*argv, "-gcm")) {
if (mode) goto bad;
mode = SM4_MODE_GCM;
} else if (!strcmp(*argv, "-ecb")) {
if (mode) goto bad;
mode = SM4_MODE_ECB;
} else if (!strcmp(*argv, "-cfb")) {
if (mode) goto bad;
mode = SM4_MODE_CFB;
} else if (!strcmp(*argv, "-ofb")) {
if (mode) goto bad;
mode = SM4_MODE_OFB;
} else if (!strcmp(*argv, "-ccm")) {
if (mode) goto bad;
mode = SM4_MODE_CCM;
} else if (!strcmp(*argv, "-xts")) {
if (mode) goto bad;
mode = SM4_MODE_XTS;
} else if (!strcmp(*argv, "-aad")) {
if (--argc < 1) goto bad;
if (aad) {
fprintf(stderr, "%s: `-aad` or `aad_hex` has been specified\n", prog);
goto bad;
}
aad = (uint8_t *)(*(++argv));
aadlen = strlen((char *)aad);
} else if (!strcmp(*argv, "-aad_hex")) {
if (--argc < 1) goto bad;
if (aad) {
fprintf(stderr, "%s: `-aad` or `aad_hex` has been specified\n", prog);
goto bad;
}
aad = (uint8_t *)(*(++argv));
if (!(aad_buf = malloc(strlen((char *)aad)/2 + 1))) {
fprintf(stderr, "%s: malloc failure\n", prog);
goto end;
}
if (hex_to_bytes((char *)aad, strlen((char *)aad), aad_buf, &aadlen) != 1) {
fprintf(stderr, "%s: `-aad_hex` invalid HEX format argument\n", prog);
goto end;
}
aad = aad_buf;
} else if (!strcmp(*argv, "-taglen")) {
if (--argc < 1) goto bad;
taglen = atoi(*(++argv));
if (taglen < 0 || taglen > 32) {
fprintf(stderr, "%s: `-taglen` invalid integer argument\n", prog);
goto end;
}
} else if (!strcmp(*argv, "-xts_data_unit_size")) {
if (--argc < 1) goto bad;
xts_data_unit_size = atoi(*(++argv));
// FIXME: malloc outbuf for XTS
if (xts_data_unit_size > sizeof(outbuf) - 1024) {
error_print();
goto end;
}
} else if (!strcmp(*argv, "-in")) {
if (--argc < 1) goto bad;
infile = *(++argv);
if (!(infp = fopen(infile, "rb"))) {
fprintf(stderr, "%s: open '%s' failure : %s\n", prog, infile, strerror(errno));
goto end;
}
} else if (!strcmp(*argv, "-out")) {
if (--argc < 1) goto bad;
outfile = *(++argv);
if (!(outfp = fopen(outfile, "wb"))) {
fprintf(stderr, "%s: open '%s' failure : %s\n", prog, outfile, strerror(errno));
goto end;
}
} else {
fprintf(stderr, "%s: illegal option `%s`\n", prog, *argv);
goto end;
bad:
fprintf(stderr, "%s: `%s` option value missing\n", prog, *argv);
goto end;
}
argc--;
argv++;
}
if (!mode) {
fprintf(stderr, "%s: mode not assigned, `-cbc`, `-ctr`, `-gcm`, `-cbc_sm3_hmac` or `-ctr_sm3_hmac` required\n", prog);
goto end;
}
if (!keyhex) {
fprintf(stderr, "%s: option `-key` missing\n", prog);
goto end;
}
/*
if (!ivhex) {
fprintf(stderr, "%s: option `-iv` missing\n", prog);
goto end;
}
*/
// check if mode is supported
switch (mode) {
#ifdef ENABLE_SM4_ECB
case SM4_MODE_ECB:
#endif
case SM4_MODE_CBC:
#ifdef ENABLE_SM4_CFB
case SM4_MODE_CFB:
#endif
#ifdef ENABLE_SM4_OFB
case SM4_MODE_OFB:
#endif
case SM4_MODE_CTR:
#ifdef ENABLE_SM4_CCM
case SM4_MODE_CCM:
#endif
case SM4_MODE_GCM:
#ifdef ENABLE_SM4_XTS
case SM4_MODE_XTS:
#endif
case SM4_MODE_CBC_SM3_HMAC:
case SM4_MODE_CTR_SM3_HMAC:
break;
default:
fprintf(stderr, "%s: mode is not supported\n", prog);
goto end;
}
// check key length
switch (mode) {
case SM4_MODE_ECB:
case SM4_MODE_CBC:
case SM4_MODE_CFB:
case SM4_MODE_OFB:
case SM4_MODE_CTR:
case SM4_MODE_CCM:
case SM4_MODE_GCM:
if (keylen != 16) {
fprintf(stderr, "%s: invalid key length, should be 32 hex digits\n", prog);
goto end;
}
break;
case SM4_MODE_XTS:
if (keylen != 32) {
fprintf(stderr, "%s: invalid key length, should be 64 hex digits\n", prog);
goto end;
}
break;
case SM4_MODE_CBC_SM3_HMAC:
case SM4_MODE_CTR_SM3_HMAC:
if (keylen != 48) {
fprintf(stderr, "%s: invalid key length, should be 96 hex digits\n", prog);
goto end;
}
break;
}
// check iv length
switch (mode) {
case SM4_MODE_ECB:
if (ivlen != 0) {
fprintf(stderr, "%s: ECB mode need no IV\n", prog);
goto end;
}
break;
case SM4_MODE_CBC:
case SM4_MODE_CFB:
case SM4_MODE_OFB:
case SM4_MODE_CTR:
case SM4_MODE_CBC_SM3_HMAC:
case SM4_MODE_CTR_SM3_HMAC:
if (ivlen != 16) {
fprintf(stderr, "%s: invalid IV length, should be 32 hex digits\n", prog);
goto end;
}
break;
}
// check aad
switch (mode) {
case SM4_MODE_ECB:
case SM4_MODE_CBC:
case SM4_MODE_CFB:
case SM4_MODE_OFB:
case SM4_MODE_CTR:
case SM4_MODE_XTS:
if (aad) {
fprintf(stderr, "%s: specified mode does not support `-aad` nor `-aad_hex`\n", prog);
goto end;
}
break;
}
// encrypt/decrypt
if (mode == SM4_MODE_CTR) {
if (sm4_ctr_encrypt_init(&sm4_ctx.ctr, key, iv) != 1) {
error_print();
goto end;
}
while ((inlen = fread(inbuf, 1, sizeof(inbuf), infp)) > 0) {
if (sm4_ctr_encrypt_update(&sm4_ctx.ctr, inbuf, inlen, outbuf, &outlen) != 1) {
error_print();
goto end;
}
if (fwrite(outbuf, 1, outlen, outfp) != outlen) {
fprintf(stderr, "%s: output failure : %s\n", prog, strerror(errno));
goto end;
}
}
if (sm4_ctr_encrypt_finish(&sm4_ctx.ctr, outbuf, &outlen) != 1) {
error_print();
goto end;
}
if (fwrite(outbuf, 1, outlen, outfp) != outlen) {
fprintf(stderr, "%s: output failure : %s\n", prog, strerror(errno));
goto end;
}
ret = 0;
goto end;
}
if (enc < 0) {
fprintf(stderr, "%s: option -encrypt or -decrypt should be set\n", prog);
goto end;
}
#ifdef ENABLE_SM4_CCM
if (mode == SM4_MODE_CCM) {
if (sm4_ccm_crypt(key, keylen, iv, ivlen, aad, aadlen, taglen, infp, outfp, enc, prog) != 1) {
goto end;
}
}
#endif
if (enc) {
switch (mode) {
#ifdef ENABLE_SM4_ECB
case SM4_MODE_ECB: rv = sm4_ecb_encrypt_init(&sm4_ctx.ecb, key); break;
#endif
case SM4_MODE_CBC: rv = sm4_cbc_encrypt_init(&sm4_ctx.cbc, key, iv); break;
#ifdef ENABLE_SM4_CFB
case SM4_MODE_CFB: rv = sm4_cfb_encrypt_init(&sm4_ctx.cfb, 16, key, iv); break;
#endif
#ifdef ENABLE_SM4_OFB
case SM4_MODE_OFB: rv = sm4_ofb_encrypt_init(&sm4_ctx.ofb, key, iv); break;
#endif
#ifdef ENABLE_SM4_XTS
case SM4_MODE_XTS: rv = sm4_xts_encrypt_init(&sm4_ctx.xts, key, iv, xts_data_unit_size); break;
#endif
case SM4_MODE_GCM: rv = sm4_gcm_encrypt_init(&sm4_ctx.gcm, key, keylen, iv, ivlen, aad, aadlen, GHASH_SIZE); break;
case SM4_MODE_CBC_SM3_HMAC: rv = sm4_cbc_sm3_hmac_encrypt_init(&sm4_ctx.cbc_sm3_hmac, key, keylen, iv, ivlen, aad, aadlen); break;
case SM4_MODE_CTR_SM3_HMAC: rv = sm4_ctr_sm3_hmac_encrypt_init(&sm4_ctx.ctr_sm3_hmac, key, keylen, iv, ivlen, aad, aadlen); break;
}
if (rv != 1) {
error_print();
goto end;
}
while ((inlen = fread(inbuf, 1, sizeof(inbuf), infp)) > 0) {
switch (mode) {
#ifdef ENABLE_SM4_ECB
case SM4_MODE_ECB: rv = sm4_ecb_encrypt_update(&sm4_ctx.ecb, inbuf, inlen, outbuf, &outlen); break;
#endif
case SM4_MODE_CBC: rv = sm4_cbc_encrypt_update(&sm4_ctx.cbc, inbuf, inlen, outbuf, &outlen); break;
#ifdef ENABLE_SM4_CFB
case SM4_MODE_CFB: rv = sm4_cfb_encrypt_update(&sm4_ctx.cfb, inbuf, inlen, outbuf, &outlen); break;
#endif
#ifdef ENABLE_SM4_OFB
case SM4_MODE_OFB: rv = sm4_ofb_encrypt_update(&sm4_ctx.ofb, inbuf, inlen, outbuf, &outlen); break;
#endif
#ifdef ENABLE_SM4_XTS
case SM4_MODE_XTS: rv = sm4_xts_encrypt_update(&sm4_ctx.xts, inbuf, inlen, outbuf, &outlen); break;
#endif
case SM4_MODE_GCM: rv = sm4_gcm_encrypt_update(&sm4_ctx.gcm, inbuf, inlen, outbuf, &outlen); break;
case SM4_MODE_CBC_SM3_HMAC: rv = sm4_cbc_sm3_hmac_encrypt_update(&sm4_ctx.cbc_sm3_hmac, inbuf, inlen, outbuf, &outlen); break;
case SM4_MODE_CTR_SM3_HMAC: rv = sm4_ctr_sm3_hmac_encrypt_update(&sm4_ctx.ctr_sm3_hmac, inbuf, inlen, outbuf, &outlen); break;
}
if (rv != 1) {
error_print();
goto end;
}
if (fwrite(outbuf, 1, outlen, outfp) != outlen) {
fprintf(stderr, "%s: output failure : %s\n", prog, strerror(errno));
goto end;
}
}
switch (mode) {
#ifdef ENABLE_SM4_ECB
case SM4_MODE_ECB: rv = sm4_ecb_encrypt_finish(&sm4_ctx.ecb, outbuf, &outlen); break;
#endif
case SM4_MODE_CBC: rv = sm4_cbc_encrypt_finish(&sm4_ctx.cbc, outbuf, &outlen); break;
#ifdef ENABLE_SM4_CFB
case SM4_MODE_CFB: rv = sm4_cfb_encrypt_finish(&sm4_ctx.cfb, outbuf, &outlen); break;
#endif
#ifdef ENABLE_SM4_OFB
case SM4_MODE_OFB: rv = sm4_ofb_encrypt_finish(&sm4_ctx.ofb, outbuf, &outlen); break;
#endif
#ifdef ENABLE_SM4_XTS
case SM4_MODE_XTS: rv = sm4_xts_encrypt_finish(&sm4_ctx.xts, outbuf, &outlen); break;
#endif
case SM4_MODE_GCM: rv = sm4_gcm_encrypt_finish(&sm4_ctx.gcm, outbuf, &outlen); break;
case SM4_MODE_CBC_SM3_HMAC: rv = sm4_cbc_sm3_hmac_encrypt_finish(&sm4_ctx.cbc_sm3_hmac, outbuf, &outlen); break;
case SM4_MODE_CTR_SM3_HMAC: rv = sm4_ctr_sm3_hmac_encrypt_finish(&sm4_ctx.ctr_sm3_hmac, outbuf, &outlen); break;
}
if (rv != 1) {
error_print();
goto end;
}
if (fwrite(outbuf, 1, outlen, outfp) != outlen) {
fprintf(stderr, "%s: output failure : %s\n", prog, strerror(errno));
goto end;
}
} else {
switch (mode) {
#ifdef ENABLE_SM4_ECB
case SM4_MODE_ECB: rv = sm4_ecb_decrypt_init(&sm4_ctx.ecb, key); break;
#endif
case SM4_MODE_CBC: rv = sm4_cbc_decrypt_init(&sm4_ctx.cbc, key, iv); break;
#ifdef ENABLE_SM4_CFB
case SM4_MODE_CFB: rv = sm4_cfb_decrypt_init(&sm4_ctx.cfb, 16, key, iv); break;
#endif
#ifdef ENABLE_SM4_OFB
case SM4_MODE_OFB: rv = sm4_ofb_encrypt_init(&sm4_ctx.ofb, key, iv); break;
#endif
#ifdef ENABLE_SM4_XTS
case SM4_MODE_XTS: rv = sm4_xts_decrypt_init(&sm4_ctx.xts, key, iv, xts_data_unit_size); break;
#endif
case SM4_MODE_GCM: rv = sm4_gcm_decrypt_init(&sm4_ctx.gcm, key, keylen, iv, ivlen, aad, aadlen, GHASH_SIZE); break;
case SM4_MODE_CBC_SM3_HMAC: rv = sm4_cbc_sm3_hmac_decrypt_init(&sm4_ctx.cbc_sm3_hmac, key, keylen, iv, ivlen, aad, aadlen); break;
case SM4_MODE_CTR_SM3_HMAC: rv = sm4_ctr_sm3_hmac_decrypt_init(&sm4_ctx.ctr_sm3_hmac, key, keylen, iv, ivlen, aad, aadlen); break;
}
if (rv != 1) {
error_print();
goto end;
}
while ((inlen = fread(inbuf, 1, sizeof(inbuf), infp)) > 0) {
switch (mode) {
#ifdef ENABLE_SM4_ECB
case SM4_MODE_ECB: rv = sm4_ecb_decrypt_update(&sm4_ctx.ecb, inbuf, inlen, outbuf, &outlen); break;
#endif
case SM4_MODE_CBC: rv = sm4_cbc_decrypt_update(&sm4_ctx.cbc, inbuf, inlen, outbuf, &outlen); break;
#ifdef ENABLE_SM4_CFB
case SM4_MODE_CFB: rv = sm4_cfb_decrypt_update(&sm4_ctx.cfb, inbuf, inlen, outbuf, &outlen); break;
#endif
#ifdef ENABLE_SM4_OFB
case SM4_MODE_OFB: rv = sm4_ofb_encrypt_update(&sm4_ctx.ofb, inbuf, inlen, outbuf, &outlen); break;
#endif
#ifdef ENABLE_SM4_XTS
case SM4_MODE_XTS: rv = sm4_xts_encrypt_update(&sm4_ctx.xts, inbuf, inlen, outbuf, &outlen); break;
#endif
case SM4_MODE_GCM: rv = sm4_gcm_decrypt_update(&sm4_ctx.gcm, inbuf, inlen, outbuf, &outlen); break;
case SM4_MODE_CBC_SM3_HMAC: rv = sm4_cbc_sm3_hmac_decrypt_update(&sm4_ctx.cbc_sm3_hmac, inbuf, inlen, outbuf, &outlen); break;
case SM4_MODE_CTR_SM3_HMAC: rv = sm4_ctr_sm3_hmac_decrypt_update(&sm4_ctx.ctr_sm3_hmac, inbuf, inlen, outbuf, &outlen); break;
}
if (rv != 1) {
error_print();
goto end;
}
if (fwrite(outbuf, 1, outlen, outfp) != outlen) {
fprintf(stderr, "%s: output failure : %s\n", prog, strerror(errno));
goto end;
}
}
switch (mode) {
#ifdef ENABLE_SM4_ECB
case SM4_MODE_ECB: rv = sm4_ecb_decrypt_finish(&sm4_ctx.ecb, outbuf, &outlen); break;
#endif
case SM4_MODE_CBC: rv = sm4_cbc_decrypt_finish(&sm4_ctx.cbc, outbuf, &outlen); break;
#ifdef ENABLE_SM4_CFB
case SM4_MODE_CFB: rv = sm4_cfb_decrypt_finish(&sm4_ctx.cfb, outbuf, &outlen); break;
#endif
#ifdef ENABLE_SM4_OFB
case SM4_MODE_OFB: rv = sm4_ofb_encrypt_finish(&sm4_ctx.ofb, outbuf, &outlen); break;
#endif
#ifdef ENABLE_SM4_XTS
case SM4_MODE_XTS: rv = sm4_xts_decrypt_finish(&sm4_ctx.xts, outbuf, &outlen); break;
#endif
case SM4_MODE_GCM: rv = sm4_gcm_decrypt_finish(&sm4_ctx.gcm, outbuf, &outlen); break;
case SM4_MODE_CBC_SM3_HMAC: rv = sm4_cbc_sm3_hmac_decrypt_finish(&sm4_ctx.cbc_sm3_hmac, outbuf, &outlen); break;
case SM4_MODE_CTR_SM3_HMAC: rv = sm4_ctr_sm3_hmac_decrypt_finish(&sm4_ctx.ctr_sm3_hmac, outbuf, &outlen); break;
}
if (rv != 1) {
error_print();
goto end;
}
if (fwrite(outbuf, 1, outlen, outfp) != outlen) {
fprintf(stderr, "%s: output failure : %s\n", prog, strerror(errno));
goto end;
}
}
ret = 0;
end:
gmssl_secure_clear(&sm4_ctx, sizeof(sm4_ctx));
gmssl_secure_clear(key, sizeof(key));
gmssl_secure_clear(iv, sizeof(iv));
gmssl_secure_clear(inbuf, sizeof(inbuf));
gmssl_secure_clear(outbuf, sizeof(outbuf));
if (aad_buf) {
gmssl_secure_clear(aad_buf, aadlen);
free(aad_buf);
}
if (infile && infp) fclose(infp);
if (outfile && outfp) fclose(outfp);
return ret;
}
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