- inp += 16;
- out += 16;
- len -= 16;
-
- if (len==0) return 0;
-
- if (is_endian.little) {
- unsigned int carry,res;
-
- res = 0x87&(((int)tweak.d[3])>>31);
- carry = (unsigned int)(tweak.u[0]>>63);
- tweak.u[0] = (tweak.u[0]<<1)^res;
- tweak.u[1] = (tweak.u[1]<<1)|carry;
- }
- else {
- size_t c;
-
- for (c=0,i=0;i<16;++i) {
- /*+ substitutes for |, because c is 1 bit */
- c += ((size_t)tweak.c[i])<<1;
- tweak.c[i] = (u8)c;
- c = c>>8;
- }
- tweak.c[0] ^= (u8)(0x87&(0-c));
- }
- }
- if (enc) {
- for (i=0;i<len;++i) {
- u8 c = inp[i];
- out[i] = scratch.c[i];
- scratch.c[i] = c;
- }
- scratch.u[0] ^= tweak.u[0];
- scratch.u[1] ^= tweak.u[1];
- (*ctx->block1)(scratch.c,scratch.c,ctx->key1);
- scratch.u[0] ^= tweak.u[0];
- scratch.u[1] ^= tweak.u[1];
- memcpy(out-16,scratch.c,16);
- }
- else {
- union { u64 u[2]; u8 c[16]; } tweak1;
-
- if (is_endian.little) {
- unsigned int carry,res;
-
- res = 0x87&(((int)tweak.d[3])>>31);
- carry = (unsigned int)(tweak.u[0]>>63);
- tweak1.u[0] = (tweak.u[0]<<1)^res;
- tweak1.u[1] = (tweak.u[1]<<1)|carry;
- }
- else {
- size_t c;
-
- for (c=0,i=0;i<16;++i) {
- /*+ substitutes for |, because c is 1 bit */
- c += ((size_t)tweak.c[i])<<1;
- tweak1.c[i] = (u8)c;
- c = c>>8;
- }
- tweak1.c[0] ^= (u8)(0x87&(0-c));
- }
+ inp += 16;
+ out += 16;
+ len -= 16;
+
+ if (len == 0)
+ return 0;
+
+ if (is_endian.little) {
+ unsigned int carry, res;
+
+ res = 0x87 & (((int)tweak.d[3]) >> 31);
+ carry = (unsigned int)(tweak.u[0] >> 63);
+ tweak.u[0] = (tweak.u[0] << 1) ^ res;
+ tweak.u[1] = (tweak.u[1] << 1) | carry;
+ } else {
+ size_t c;
+
+ for (c = 0, i = 0; i < 16; ++i) {
+ /*
+ * + substitutes for |, because c is 1 bit
+ */
+ c += ((size_t)tweak.c[i]) << 1;
+ tweak.c[i] = (u8)c;
+ c = c >> 8;
+ }
+ tweak.c[0] ^= (u8)(0x87 & (0 - c));
+ }
+ }
+ if (enc) {
+ for (i = 0; i < len; ++i) {
+ u8 c = inp[i];
+ out[i] = scratch.c[i];
+ scratch.c[i] = c;
+ }
+ scratch.u[0] ^= tweak.u[0];
+ scratch.u[1] ^= tweak.u[1];
+ (*ctx->block1) (scratch.c, scratch.c, ctx->key1);
+ scratch.u[0] ^= tweak.u[0];
+ scratch.u[1] ^= tweak.u[1];
+ memcpy(out - 16, scratch.c, 16);
+ } else {
+ union {
+ u64 u[2];
+ u8 c[16];
+ } tweak1;
+
+ if (is_endian.little) {
+ unsigned int carry, res;
+
+ res = 0x87 & (((int)tweak.d[3]) >> 31);
+ carry = (unsigned int)(tweak.u[0] >> 63);
+ tweak1.u[0] = (tweak.u[0] << 1) ^ res;
+ tweak1.u[1] = (tweak.u[1] << 1) | carry;
+ } else {
+ size_t c;
+
+ for (c = 0, i = 0; i < 16; ++i) {
+ /*
+ * + substitutes for |, because c is 1 bit
+ */
+ c += ((size_t)tweak.c[i]) << 1;
+ tweak1.c[i] = (u8)c;
+ c = c >> 8;
+ }
+ tweak1.c[0] ^= (u8)(0x87 & (0 - c));
+ }