-void idea_cbc_encrypt(in, out, length, ks, iv, encrypt)
-unsigned char *in;
-unsigned char *out;
-long length;
-IDEA_KEY_SCHEDULE *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];
+void idea_cbc_encrypt(const unsigned char *in, unsigned char *out,
+ long length, IDEA_KEY_SCHEDULE *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) {
+ n2l(iv, tout0);
+ n2l(iv, tout1);
+ iv -= 8;
+ for (l -= 8; l >= 0; l -= 8) {
+ n2l(in, tin0);
+ n2l(in, tin1);
+ tin0 ^= tout0;
+ tin1 ^= tout1;
+ tin[0] = tin0;
+ tin[1] = tin1;
+ idea_encrypt(tin, ks);
+ tout0 = tin[0];
+ l2n(tout0, out);
+ tout1 = tin[1];
+ l2n(tout1, out);
+ }
+ if (l != -8) {
+ n2ln(in, tin0, tin1, l + 8);
+ tin0 ^= tout0;
+ tin1 ^= tout1;
+ tin[0] = tin0;
+ tin[1] = tin1;
+ idea_encrypt(tin, ks);
+ tout0 = tin[0];
+ l2n(tout0, out);
+ tout1 = tin[1];
+ l2n(tout1, out);
+ }
+ l2n(tout0, iv);
+ l2n(tout1, iv);
+ } else {
+ n2l(iv, xor0);
+ n2l(iv, xor1);
+ iv -= 8;
+ for (l -= 8; l >= 0; l -= 8) {
+ n2l(in, tin0);
+ tin[0] = tin0;
+ n2l(in, tin1);
+ tin[1] = tin1;
+ idea_encrypt(tin, ks);
+ tout0 = tin[0] ^ xor0;
+ tout1 = tin[1] ^ xor1;
+ l2n(tout0, out);
+ l2n(tout1, out);
+ xor0 = tin0;
+ xor1 = tin1;
+ }
+ if (l != -8) {
+ n2l(in, tin0);
+ tin[0] = tin0;
+ n2l(in, tin1);
+ tin[1] = tin1;
+ idea_encrypt(tin, ks);
+ tout0 = tin[0] ^ xor0;
+ tout1 = tin[1] ^ xor1;
+ l2nn(tout0, tout1, out, l + 8);
+ xor0 = tin0;
+ xor1 = tin1;
+ }
+ l2n(xor0, iv);
+ l2n(xor1, iv);
+ }
+ tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0;
+ tin[0] = tin[1] = 0;
+}
+
+void idea_encrypt(unsigned long *d, IDEA_KEY_SCHEDULE *key)
+{
+ register IDEA_INT *p;
+ register unsigned long x1, x2, x3, x4, t0, t1, ul;
+
+ x2 = d[0];
+ x1 = (x2 >> 16);
+ x4 = d[1];
+ x3 = (x4 >> 16);
+
+ p = &(key->data[0][0]);
+
+ E_IDEA(0);
+ E_IDEA(1);
+ E_IDEA(2);
+ E_IDEA(3);
+ E_IDEA(4);
+ E_IDEA(5);
+ E_IDEA(6);
+ E_IDEA(7);
+
+ x1 &= 0xffff;
+ idea_mul(x1, x1, *p, ul);
+ p++;
+
+ t0 = x3 + *(p++);
+ t1 = x2 + *(p++);