Commit 502aef5a authored by Andy Polyakov's avatar Andy Polyakov
Browse files

Eliminate redundant variable in Camellia CBC routine.

parent 9f8cfb1c

crypto/camellia/cmll_cbc.c

+47 −55
Original line number Diff line number Diff line
@@ -67,9 +67,9 @@ void Camellia_cbc_encrypt(const unsigned char *in, unsigned char *out, 


	unsigned long n;

	unsigned long len = length;

	unsigned char tmp[CAMELLIA_BLOCK_SIZE];

	const unsigned char *iv = ivec;

	u32 t32[CAMELLIA_BLOCK_SIZE/sizeof(u32)];

	union {	u32 t32[CAMELLIA_BLOCK_SIZE/sizeof(u32)];

		u8  t8 [CAMELLIA_BLOCK_SIZE]; } tmp;

	const union { long one; char little; } camellia_endian = {1};
@@ -127,14 +127,14 @@ void Camellia_cbc_encrypt(const unsigned char *in, unsigned char *out, 
				}

			if (len)

				{

				memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);

				memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);

				if (camellia_endian.little)

					SWAP4WORD((u32 *)tmp);

				key->dec(key->rd_key, (u32 *)tmp);

					SWAP4WORD(tmp.t32);

				key->dec(key->rd_key, tmp.t32);

				if (camellia_endian.little)

					SWAP4WORD((u32 *)tmp);

					SWAP4WORD(tmp.t32);

				for(n=0; n < len; ++n)

					out[n] = tmp[n] ^ iv[n];

					out[n] = tmp.t8[n] ^ iv[n];

				iv = in;

				}

			memcpy(ivec,iv,CAMELLIA_BLOCK_SIZE);
@@ -143,21 +143,21 @@ void Camellia_cbc_encrypt(const unsigned char *in, unsigned char *out, 
			{

			while (len >= CAMELLIA_BLOCK_SIZE)

				{

				memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);

				memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);

				if (camellia_endian.little)

					SWAP4WORD((u32 *)out);

				key->dec(key->rd_key, (u32 *)out);

				if (camellia_endian.little)

					SWAP4WORD((u32 *)out);

				XOR4WORD((u32 *)out, (u32 *)ivec);

				memcpy(ivec, tmp, CAMELLIA_BLOCK_SIZE);

				memcpy(ivec, tmp.t8, CAMELLIA_BLOCK_SIZE);

				len -= CAMELLIA_BLOCK_SIZE;

				in += CAMELLIA_BLOCK_SIZE;

				out += CAMELLIA_BLOCK_SIZE;

				}

			if (len)

				{

				memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);

				memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);

				if (camellia_endian.little)

					SWAP4WORD((u32 *)out);

				key->dec(key->rd_key,(u32 *)out);
@@ -166,8 +166,8 @@ void Camellia_cbc_encrypt(const unsigned char *in, unsigned char *out, 
				for(n=0; n < len; ++n)

					out[n] ^= ivec[n];

				for(n=len; n < CAMELLIA_BLOCK_SIZE; ++n)

					out[n] = tmp[n];

				memcpy(ivec, tmp, CAMELLIA_BLOCK_SIZE);

					out[n] = tmp.t8[n];

				memcpy(ivec, tmp.t8, CAMELLIA_BLOCK_SIZE);

				}

			}

		}
@@ -178,14 +178,13 @@ void Camellia_cbc_encrypt(const unsigned char *in, unsigned char *out, 
			while (len >= CAMELLIA_BLOCK_SIZE)

				{

				for(n=0; n < CAMELLIA_BLOCK_SIZE; ++n)

					out[n] = in[n] ^ iv[n];

				memcpy(t32, out, CAMELLIA_BLOCK_SIZE);

					tmp.t8[n] = in[n] ^ iv[n];

				if (camellia_endian.little)

					SWAP4WORD(t32);

				key->enc(key->rd_key, t32);

					SWAP4WORD(tmp.t32);

				key->enc(key->rd_key, tmp.t32);

				if (camellia_endian.little)

					SWAP4WORD(t32);

				memcpy(out, t32, CAMELLIA_BLOCK_SIZE);

					SWAP4WORD(tmp.t32);

				memcpy(out, tmp.t8, CAMELLIA_BLOCK_SIZE);

				iv = out;

				len -= CAMELLIA_BLOCK_SIZE;

				in += CAMELLIA_BLOCK_SIZE;
@@ -194,16 +193,15 @@ void Camellia_cbc_encrypt(const unsigned char *in, unsigned char *out, 
			if (len)

				{

				for(n=0; n < len; ++n)

					out[n] = in[n] ^ iv[n];

					tmp.t8[n] = in[n] ^ iv[n];

				for(n=len; n < CAMELLIA_BLOCK_SIZE; ++n)

					out[n] = iv[n];

				memcpy(t32, out, CAMELLIA_BLOCK_SIZE);

					tmp.t8[n] = iv[n];

				if (camellia_endian.little)

					SWAP4WORD(t32);

				key->enc(key->rd_key, t32);

					SWAP4WORD(tmp.t32);

				key->enc(key->rd_key, tmp.t32);

				if (camellia_endian.little)

					SWAP4WORD(t32);

				memcpy(out, t32, CAMELLIA_BLOCK_SIZE);

					SWAP4WORD(tmp.t32);

				memcpy(out, tmp.t8, CAMELLIA_BLOCK_SIZE);

				iv = out;

				}

			memcpy(ivec,iv,CAMELLIA_BLOCK_SIZE);
@@ -212,15 +210,14 @@ void Camellia_cbc_encrypt(const unsigned char *in, unsigned char *out, 
			{

			while (len >= CAMELLIA_BLOCK_SIZE)

				{

				memcpy(t32,in,CAMELLIA_BLOCK_SIZE);

				memcpy(tmp.t8,in,CAMELLIA_BLOCK_SIZE);

				if (camellia_endian.little)

					SWAP4WORD(t32);

				key->dec(key->rd_key,t32);

					SWAP4WORD(tmp.t32);

				key->dec(key->rd_key,tmp.t32);

				if (camellia_endian.little)

					SWAP4WORD(t32);

				memcpy(out,t32,CAMELLIA_BLOCK_SIZE);

					SWAP4WORD(tmp.t32);

				for(n=0; n < CAMELLIA_BLOCK_SIZE; ++n)

					out[n] ^= iv[n];

					out[n] = tmp.t8[n] ^ iv[n];

				iv = in;

				len -= CAMELLIA_BLOCK_SIZE;

				in  += CAMELLIA_BLOCK_SIZE;
@@ -228,15 +225,14 @@ void Camellia_cbc_encrypt(const unsigned char *in, unsigned char *out, 
				}

			if (len)

				{

				memcpy(t32, in, CAMELLIA_BLOCK_SIZE);

				memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);

				if (camellia_endian.little)

					SWAP4WORD(t32);

				key->dec(key->rd_key, t32);

					SWAP4WORD(tmp.t32);

				key->dec(key->rd_key, tmp.t32);

				if (camellia_endian.little)

					SWAP4WORD(t32);

				memcpy(out, t32, CAMELLIA_BLOCK_SIZE);

					SWAP4WORD(tmp.t32);

				for(n=0; n < len; ++n)

					out[n] ^= iv[n];

					out[n] = tmp.t8[n] ^ iv[n];

				iv = in;

				}

			memcpy(ivec,iv,CAMELLIA_BLOCK_SIZE);
@@ -245,36 +241,32 @@ void Camellia_cbc_encrypt(const unsigned char *in, unsigned char *out, 
			{

			while (len >= CAMELLIA_BLOCK_SIZE)

				{

				memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);

				memcpy(t32, in, CAMELLIA_BLOCK_SIZE);

				memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);

				if (camellia_endian.little)

					SWAP4WORD(t32);

				key->dec(key->rd_key, t32);

					SWAP4WORD(tmp.t32);

				key->dec(key->rd_key, tmp.t32);

				if (camellia_endian.little)

					SWAP4WORD(t32);

				memcpy(out, t32, CAMELLIA_BLOCK_SIZE);

					SWAP4WORD(tmp.t32);

				for(n=0; n < CAMELLIA_BLOCK_SIZE; ++n)

					out[n] ^= ivec[n];

				memcpy(ivec, tmp, CAMELLIA_BLOCK_SIZE);

					tmp.t8[n] ^= ivec[n];

				memcpy(ivec, in, CAMELLIA_BLOCK_SIZE);

				memcpy(out, tmp.t8, CAMELLIA_BLOCK_SIZE);

				len -= CAMELLIA_BLOCK_SIZE;

				in += CAMELLIA_BLOCK_SIZE;

				out += CAMELLIA_BLOCK_SIZE;

				}

			if (len)

				{

				memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);

				memcpy(t32, in, CAMELLIA_BLOCK_SIZE);

				memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);

				if (camellia_endian.little)

					SWAP4WORD(t32);

				key->dec(key->rd_key,t32);

					SWAP4WORD(tmp.t32);

				key->dec(key->rd_key,tmp.t32);

				if (camellia_endian.little)

					SWAP4WORD(t32);

				memcpy(out, t32, CAMELLIA_BLOCK_SIZE);

					SWAP4WORD(tmp.t32);

				for(n=0; n < len; ++n)

					out[n] ^= ivec[n];

				for(n=len; n < CAMELLIA_BLOCK_SIZE; ++n)

					out[n] = tmp[n];

				memcpy(ivec, tmp, CAMELLIA_BLOCK_SIZE);

					tmp.t8[n] ^= ivec[n];

				memcpy(ivec, in, CAMELLIA_BLOCK_SIZE);

				memcpy(out,tmp.t8,len);

				}

			}

		}