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 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
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 *    guanzhi1980@gmail.com.
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 * 5. Products derived from this software may not be called "GmSSL"
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 */

#include <openssl/sms4.h>
#include <openssl/modes.h>


void sms4_ede_set_encrypt_key(sms4_ede_key_t *key,
	const unsigned char user_key[48])
{
	sms4_set_encrypt_key(&key->k1, user_key);
	sms4_set_decrypt_key(&key->k2, user_key + 16);
	sms4_set_encrypt_key(&key->k3, user_key + 32);
}

void sms4_ede_set_decrypt_key(sms4_ede_key_t *key,
	const unsigned char user_key[48])
{
	sms4_set_decrypt_key(&key->k1, user_key + 32);
	sms4_set_encrypt_key(&key->k2, user_key + 16);
	sms4_set_decrypt_key(&key->k3, user_key);
}

void sms4_ede_encrypt(const unsigned char in[16], unsigned char out[16],
	const sms4_ede_key_t *key)
{
	sms4_encrypt(in, out, &key->k1);
	sms4_encrypt(out, out, &key->k2);
	sms4_encrypt(out, out, &key->k3);
}

void sms4_ede_ecb_encrypt(const unsigned char *in, unsigned char *out,
	const sms4_ede_key_t *key, int enc)
{
	sms4_ede_encrypt(in, out, key);
}

void sms4_ede_cbc_encrypt(const unsigned char *in, unsigned char *out,
	size_t len, const sms4_ede_key_t *key, unsigned char *iv, int enc)
{
	if (enc)
		CRYPTO_cbc128_encrypt(in, out, len, key, iv,
			(block128_f)sms4_ede_encrypt);
	else	CRYPTO_cbc128_decrypt(in, out, len, key, iv,
			(block128_f)sms4_ede_encrypt);
}

void sms4_ede_cfb128_encrypt(const unsigned char *in, unsigned char *out,
	size_t len, const sms4_ede_key_t *key, unsigned char *iv, int *num,
	int enc)
{
	CRYPTO_cfb128_encrypt(in, out, len, key, iv, num, enc,
		(block128_f)sms4_ede_encrypt);
}

void sms4_ede_ofb128_encrypt(const unsigned char *in, unsigned char *out,
	size_t len, const sms4_ede_key_t *key, unsigned char *iv, int *num)
{
	CRYPTO_ofb128_encrypt(in, out, len, key, iv, num,
		(block128_f)sms4_ede_encrypt);
}

void sms4_ede_ctr128_encrypt(const unsigned char *in, unsigned char *out,
	size_t len, const sms4_ede_key_t *key, unsigned char *iv,
	unsigned char ecount_buf[SMS4_BLOCK_SIZE], unsigned int *num)
{
	CRYPTO_ctr128_encrypt(in, out, len, key, iv, ecount_buf, num,
		(block128_f)sms4_ede_encrypt);
}

int sms4_ede_wrap_key(sms4_ede_key_t *key, const unsigned char *iv,
	unsigned char *out, const unsigned char *in, unsigned int inlen)
{
	return CRYPTO_128_wrap(key, iv, out, in, inlen,
		(block128_f)sms4_ede_encrypt);
}

int sms4_ede_unwrap_key(sms4_ede_key_t *key, const unsigned char *iv,
	unsigned char *out, const unsigned char *in, unsigned int inlen)
{
	return CRYPTO_128_unwrap(key, iv, out, in, inlen,
		(block128_f)sms4_ede_encrypt);
}