-void RC5_32_cbc_encrypt(in, out, length, ks, iv, encrypt)
-unsigned char *in;
-unsigned char *out;
-long length;
-RC5_32_KEY *ks;
-unsigned char *iv;
-int encrypt;
- {
- register unsigned long tin0,tin1;
- register unsigned long tout0,tout1,xor0,xor1;
- register long l=length;
- unsigned long tin[2];
-
- if (encrypt)
- {
- c2l(iv,tout0);
- c2l(iv,tout1);
- iv-=8;
- for (l-=8; l>=0; l-=8)
- {
- c2l(in,tin0);
- c2l(in,tin1);
- tin0^=tout0;
- tin1^=tout1;
- tin[0]=tin0;
- tin[1]=tin1;
- RC5_32_encrypt(tin,ks);
- tout0=tin[0]; l2c(tout0,out);
- tout1=tin[1]; l2c(tout1,out);
- }
- if (l != -8)
- {
- c2ln(in,tin0,tin1,l+8);
- tin0^=tout0;
- tin1^=tout1;
- tin[0]=tin0;
- tin[1]=tin1;
- RC5_32_encrypt(tin,ks);
- tout0=tin[0]; l2c(tout0,out);
- tout1=tin[1]; l2c(tout1,out);
- }
- l2c(tout0,iv);
- l2c(tout1,iv);
- }
- else
- {
- c2l(iv,xor0);
- c2l(iv,xor1);
- iv-=8;
- for (l-=8; l>=0; l-=8)
- {
- c2l(in,tin0); tin[0]=tin0;
- c2l(in,tin1); tin[1]=tin1;
- RC5_32_decrypt(tin,ks);
- tout0=tin[0]^xor0;
- tout1=tin[1]^xor1;
- l2c(tout0,out);
- l2c(tout1,out);
- xor0=tin0;
- xor1=tin1;
- }
- if (l != -8)
- {
- c2l(in,tin0); tin[0]=tin0;
- c2l(in,tin1); tin[1]=tin1;
- RC5_32_decrypt(tin,ks);
- tout0=tin[0]^xor0;
- tout1=tin[1]^xor1;
- l2cn(tout0,tout1,out,l+8);
- xor0=tin0;
- xor1=tin1;
- }
- l2c(xor0,iv);
- l2c(xor1,iv);
- }
- tin0=tin1=tout0=tout1=xor0=xor1=0;
- tin[0]=tin[1]=0;
- }
+void RC5_32_cbc_encrypt(const unsigned char *in, unsigned char *out,
+ long length, RC5_32_KEY *ks, unsigned char *iv,
+ int encrypt)
+{
+ register unsigned long tin0, tin1;
+ register unsigned long tout0, tout1, xor0, xor1;
+ register long l = length;
+ unsigned long tin[2];