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add sdf and skf

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This commit is contained in:
Zhi Guan
2021-08-03 17:09:35 +08:00
parent d6feba3749
commit a57193836b
71 changed files with 11100 additions and 765 deletions
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10
src/sm4_modes.c
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@@ -81,7 +81,7 @@ int sm4_cbc_padding_encrypt(const SM4_KEY *key, const uint8_t iv[16],
{
uint8_t block[16];
size_t rem = inlen % 16;
int padding = 16 - rem;
int padding = 16 - inlen % 16;
if (in) {
memcpy(block, in + inlen - rem, rem);
@@ -102,14 +102,15 @@ int sm4_cbc_padding_decrypt(const SM4_KEY *key, const uint8_t iv[16],
uint8_t *out, size_t *outlen)
{
uint8_t block[16];
size_t len = sizeof(block);
int padding;
if (inlen == 0) {
error_print("warning: input lenght = 0");
error_puts("warning: input lenght = 0");
return 0;
}
if (inlen%16 != 0 || inlen < 16) {
error_print("invalid cbc ciphertext length");
error_puts("invalid cbc ciphertext length");
return -1;
}
if (inlen > 16) {
@@ -122,7 +123,8 @@ int sm4_cbc_padding_decrypt(const SM4_KEY *key, const uint8_t iv[16],
error_print();
return -1;
}
memcpy(out + inlen - 16, block, 16 - padding);
len -= padding;
memcpy(out + inlen - 16, block, len);
*outlen = inlen - padding;
return 1;
}