GmSSL/crypto/speck/speck.c

/* ====================================================================
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#include <openssl/speck.h>

void speck_set_encrypt_key16(SPECK_TYPE16 const K[SPECK_KEY_LEN16], SPECK_TYPE16 S[SPECK_ROUNDS16])
{
	SPECK_TYPE16 i, b = K[0];
	SPECK_TYPE16 a[SPECK_KEY_LEN16 - 1];
	for (i = 0; i < (SPECK_KEY_LEN16 - 1); i++)
	{
		a[i] = K[i + 1];
	}
	S[0] = b;
	for (i = 0; i < SPECK_ROUNDS16 - 1; i++) {
		R16(a[i % (SPECK_KEY_LEN16 - 1)], b, i);
		S[i + 1] = b;
	}
}
void speck_set_decrypt_key16(SPECK_TYPE16 const K[SPECK_KEY_LEN16], SPECK_TYPE16 S[SPECK_ROUNDS16])
{
	SPECK_TYPE16 i, b = K[0];
	SPECK_TYPE16 a[SPECK_KEY_LEN16 - 1];
	for (i = 0; i < (SPECK_KEY_LEN16 - 1); i++)
	{
		a[i] = K[i + 1];
	}
	S[0] = b;
	for (i = 0; i < SPECK_ROUNDS16 - 1; i++) {
		R16(a[i % (SPECK_KEY_LEN16 - 1)], b, i);
		S[i + 1] = b;
	}
}
void speck_encrypt16(SPECK_TYPE16 const pt[2], SPECK_TYPE16 ct[2], SPECK_TYPE16 const K[SPECK_ROUNDS16])
{
	SPECK_TYPE16 i;
	ct[0] = pt[0]; ct[1] = pt[1];
	for (i = 0; i < SPECK_ROUNDS16; i++){
		R16(ct[1], ct[0], K[i]);
	}
}

void speck_decrypt16(SPECK_TYPE16 const ct[2], SPECK_TYPE16 pt[2], SPECK_TYPE16 const K[SPECK_ROUNDS16])
{
	SPECK_TYPE16 i;
	pt[0] = ct[0]; pt[1] = ct[1];

	for (i = 0; i < SPECK_ROUNDS16; i++){
		RR16(pt[1], pt[0], K[(SPECK_ROUNDS16 - 1) - i]);
	}
}



void speck_set_encrypt_key32(SPECK_TYPE32 const K[SPECK_KEY_LEN32], SPECK_TYPE32 S[SPECK_ROUNDS32])
{
	SPECK_TYPE32 i, b = K[0];
	SPECK_TYPE32 a[SPECK_KEY_LEN32 - 1];
	for (i = 0; i < (SPECK_KEY_LEN32 - 1); i++)
	{
		a[i] = K[i + 1];
	}
	S[0] = b;
	for (i = 0; i < SPECK_ROUNDS32 - 1; i++) {
		R32(a[i % (SPECK_KEY_LEN32 - 1)], b, i);
		S[i + 1] = b;
	}
}
void speck_set_decrypt_key32(SPECK_TYPE32 const K[SPECK_KEY_LEN32], SPECK_TYPE32 S[SPECK_ROUNDS32])
{
	SPECK_TYPE32 i, b = K[0];
	SPECK_TYPE32 a[SPECK_KEY_LEN32 - 1];
	for (i = 0; i < (SPECK_KEY_LEN32 - 1); i++)
	{
		a[i] = K[i + 1];
	}
	S[0] = b;
	for (i = 0; i < SPECK_ROUNDS32 - 1; i++) {
		R32(a[i % (SPECK_KEY_LEN32 - 1)], b, i);
		S[i + 1] = b;
	}
}
void speck_encrypt32(SPECK_TYPE32 const pt[2], SPECK_TYPE32 ct[2], SPECK_TYPE32 const K[SPECK_ROUNDS32])
{
	SPECK_TYPE32 i;
	ct[0] = pt[0]; ct[1] = pt[1];
	for (i = 0; i < SPECK_ROUNDS32; i++){
		R32(ct[1], ct[0], K[i]);
	}
}

void speck_decrypt32(SPECK_TYPE32 const ct[2], SPECK_TYPE32 pt[2], SPECK_TYPE32 const K[SPECK_ROUNDS32])
{
	SPECK_TYPE32 i;
	pt[0] = ct[0]; pt[1] = ct[1];

	for (i = 0; i < SPECK_ROUNDS32; i++){
		RR32(pt[1], pt[0], K[(SPECK_ROUNDS32 - 1) - i]);
	}
}


void speck_set_encrypt_key64(SPECK_TYPE64 const K[SPECK_KEY_LEN64], SPECK_TYPE64 S[SPECK_ROUNDS64])
{
	SPECK_TYPE64 i, b = K[0];
	SPECK_TYPE64 a[SPECK_KEY_LEN64 - 1];
	for (i = 0; i < (SPECK_KEY_LEN64 - 1); i++)
	{
		a[i] = K[i + 1];
	}
	S[0] = b;
	for (i = 0; i < SPECK_ROUNDS64 - 1; i++) {
		R64(a[i % (SPECK_KEY_LEN64 - 1)], b, i);
		S[i + 1] = b;
	}
}
void speck_set_decrypt_key64(SPECK_TYPE64 const K[SPECK_KEY_LEN64], SPECK_TYPE64 S[SPECK_ROUNDS64])
{
	SPECK_TYPE64 i, b = K[0];
	SPECK_TYPE64 a[SPECK_KEY_LEN64 - 1];
	for (i = 0; i < (SPECK_KEY_LEN64 - 1); i++)
	{
		a[i] = K[i + 1];
	}
	S[0] = b;
	for (i = 0; i < SPECK_ROUNDS64 - 1; i++) {
		R64(a[i % (SPECK_KEY_LEN64 - 1)], b, i);
		S[i + 1] = b;
	}
}
void speck_encrypt64(SPECK_TYPE64 const pt[2], SPECK_TYPE64 ct[2], SPECK_TYPE64 const K[SPECK_ROUNDS64])
{
	SPECK_TYPE64 i;
	ct[0] = pt[0]; ct[1] = pt[1];
	for (i = 0; i < SPECK_ROUNDS64; i++){
		R64(ct[1], ct[0], K[i]);
	}
}

void speck_decrypt64(SPECK_TYPE64 const ct[2], SPECK_TYPE64 pt[2], SPECK_TYPE64 const K[SPECK_ROUNDS64])
{
	SPECK_TYPE64 i;
	pt[0] = ct[0]; pt[1] = ct[1];

	for (i = 0; i < SPECK_ROUNDS64; i++){
		RR64(pt[1], pt[0], K[(SPECK_ROUNDS64 - 1) - i]);
	}
}