void des_ecb3_encrypt(des_cblock *input, des_cblock *output,
des_key_schedule ks1, des_key_schedule ks2, des_key_schedule ks3,
int enc)
{
register DES_LONG l0,l1;
DES_LONG ll[2];
const unsigned char *in = &(*input)[0];
unsigned char *out = &(*output)[0];
c2l(in,l0);
c2l(in,l1);
ll[0]=l0;
ll[1]=l1;
if (enc)
des_encrypt3(ll,ks1,ks2,ks3);
else
des_decrypt3(ll,ks1,ks2,ks3);
l0=ll[0];
l1=ll[1];
l2c(l0,out);
l2c(l1,out);
}
void des_ede3_cbc_encrypt(const unsigned char *input, unsigned char *output,
long length, des_key_schedule ks1, des_key_schedule ks2,
des_key_schedule ks3, des_cblock *ivec, int enc)
{
register DES_LONG tin0,tin1;
register DES_LONG tout0,tout1,xor0,xor1;
register const unsigned char *in;
unsigned char *out;
register long l=length;
DES_LONG tin[2];
unsigned char *iv;
in=input;
out=output;
iv = &(*ivec)[0];
if (enc)
{
c2l(iv,tout0);
c2l(iv,tout1);
for (l-=8; l>=0; l-=8)
{
c2l(in,tin0);
c2l(in,tin1);
tin0^=tout0;
tin1^=tout1;
tin[0]=tin0;
tin[1]=tin1;
des_encrypt3((DES_LONG *)tin,ks1,ks2,ks3);
tout0=tin[0];
tout1=tin[1];
l2c(tout0,out);
l2c(tout1,out);
}
if (l != -8)
{
c2ln(in,tin0,tin1,l+8);
tin0^=tout0;
tin1^=tout1;
tin[0]=tin0;
tin[1]=tin1;
des_encrypt3((DES_LONG *)tin,ks1,ks2,ks3);
tout0=tin[0];
tout1=tin[1];
l2c(tout0,out);
l2c(tout1,out);
}
iv = &(*ivec)[0];
l2c(tout0,iv);
l2c(tout1,iv);
}
else
{
register DES_LONG t0,t1;
c2l(iv,xor0);
c2l(iv,xor1);
for (l-=8; l>=0; l-=8)
{
c2l(in,tin0);
c2l(in,tin1);
t0=tin0;
t1=tin1;
tin[0]=tin0;
tin[1]=tin1;
des_decrypt3((DES_LONG *)tin,ks1,ks2,ks3);
tout0=tin[0];
tout1=tin[1];
tout0^=xor0;
tout1^=xor1;
l2c(tout0,out);
l2c(tout1,out);
xor0=t0;
xor1=t1;
}
if (l != -8)
{
c2l(in,tin0);
c2l(in,tin1);
t0=tin0;
t1=tin1;
tin[0]=tin0;
tin[1]=tin1;
des_decrypt3((DES_LONG *)tin,ks1,ks2,ks3);
tout0=tin[0];
tout1=tin[1];
tout0^=xor0;
tout1^=xor1;
l2cn(tout0,tout1,out,l+8);
xor0=t0;
xor1=t1;
}
iv = &(*ivec)[0];
l2c(xor0,iv);
l2c(xor1,iv);
}
tin0=tin1=tout0=tout1=xor0=xor1=0;
tin[0]=tin[1]=0;
}
