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use core::mem::transmute; use super::u64x2; mod expand; #[derive(Copy, Clone, Debug)] pub struct Aes256 { encrypt_keys: [u64x2; 15], decrypt_keys: [u64x2; 15], } impl Aes256 { #[inline] pub fn new(key: &[u8; 32]) -> Self { let (encrypt_keys, decrypt_keys) = expand::expand(key); Aes256 { encrypt_keys: encrypt_keys, decrypt_keys: decrypt_keys } } #[inline] pub fn encrypt(&self, block: &mut [u8; 16]) { assert!((block.as_ptr() as usize) % 16 == 0, "unaligned input"); let keys = self.encrypt_keys; unsafe { let mut data: &mut u64x2 = transmute(block); asm!(include_str!("encrypt.asm") : "+{xmm0}"(*data) : "{xmm1}"(keys[0]), "{xmm2}"(keys[1]), "{xmm3}"(keys[2]), "{xmm4}"(keys[3]), "{xmm5}"(keys[4]), "{xmm6}"(keys[5]), "{xmm7}"(keys[6]), "{xmm8}"(keys[7]), "{xmm9}"(keys[8]), "{xmm10}"(keys[9]), "{xmm11}"(keys[10]), "{xmm12}"(keys[11]), "{xmm13}"(keys[12]), "{xmm14}"(keys[13]), "{xmm15}"(keys[14]) : : "intel", "alignstack" ); } } #[inline] pub fn decrypt(&self, block: &mut [u8; 16]) { assert!((block.as_ptr() as usize) % 16 == 0, "unaligned input"); let keys = self.decrypt_keys; unsafe { let mut data: &mut u64x2 = transmute(block); asm!(include_str!("decrypt.asm") : "+{xmm0}"(*data) : "{xmm1}"(keys[14]), "{xmm2}"(keys[13]), "{xmm3}"(keys[12]), "{xmm4}"(keys[11]), "{xmm5}"(keys[10]), "{xmm6}"(keys[9]), "{xmm7}"(keys[8]), "{xmm8}"(keys[7]), "{xmm9}"(keys[6]), "{xmm10}"(keys[5]), "{xmm11}"(keys[4]), "{xmm12}"(keys[3]), "{xmm13}"(keys[2]), "{xmm14}"(keys[1]), "{xmm15}"(keys[0]) : : "intel", "alignstack" ); } } #[inline] pub fn encrypt8(&self, blocks: &mut [u8; 8*16]) { assert!((blocks.as_ptr() as usize) % 16 == 0, "unaligned input"); let keys = self.encrypt_keys; unsafe { let mut data: &mut [u64x2; 8] = transmute(blocks); asm!(include_str!("encrypt8_1.asm") : "+{xmm0}"(data[0]), "+{xmm1}"(data[1]), "+{xmm2}"(data[2]), "+{xmm3}"(data[3]), "+{xmm4}"(data[4]), "+{xmm5}"(data[5]), "+{xmm6}"(data[6]), "+{xmm7}"(data[7]) : "{xmm8}"(keys[0]), "{xmm9}"(keys[1]), "{xmm10}"(keys[2]), "{xmm11}"(keys[3]), "{xmm12}"(keys[4]), "{xmm13}"(keys[5]), "{xmm14}"(keys[6]), "{xmm15}"(keys[7]) : : "intel", "alignstack" ); asm!(include_str!("encrypt8_2.asm") : "+{xmm0}"(data[0]), "+{xmm1}"(data[1]), "+{xmm2}"(data[2]), "+{xmm3}"(data[3]), "+{xmm4}"(data[4]), "+{xmm5}"(data[5]), "+{xmm6}"(data[6]), "+{xmm7}"(data[7]) : "{xmm9}"(keys[8]), "{xmm10}"(keys[9]), "{xmm11}"(keys[10]), "{xmm12}"(keys[11]), "{xmm13}"(keys[12]), "{xmm14}"(keys[13]), "{xmm15}"(keys[14]) : : "intel", "alignstack" ); } } #[inline] pub fn decrypt8(&self, blocks: &mut [u8; 8*16]) { assert!((blocks.as_ptr() as usize) % 16 == 0, "unaligned input"); let keys = self.decrypt_keys; unsafe { let mut data: &mut [u64x2; 8] = transmute(blocks); asm!(include_str!("decrypt8_1.asm") : "+{xmm0}"(data[0]), "+{xmm1}"(data[1]), "+{xmm2}"(data[2]), "+{xmm3}"(data[3]), "+{xmm4}"(data[4]), "+{xmm5}"(data[5]), "+{xmm6}"(data[6]), "+{xmm7}"(data[7]) : "{xmm8}"(keys[14]), "{xmm9}"(keys[13]), "{xmm10}"(keys[12]), "{xmm11}"(keys[11]), "{xmm12}"(keys[10]), "{xmm13}"(keys[9]), "{xmm14}"(keys[8]), "{xmm15}"(keys[7]) : : "intel", "alignstack" ); asm!(include_str!("decrypt8_2.asm") : "+{xmm0}"(data[0]), "+{xmm1}"(data[1]), "+{xmm2}"(data[2]), "+{xmm3}"(data[3]), "+{xmm4}"(data[4]), "+{xmm5}"(data[5]), "+{xmm6}"(data[6]), "+{xmm7}"(data[7]) : "{xmm9}"(keys[6]), "{xmm10}"(keys[5]), "{xmm11}"(keys[4]), "{xmm12}"(keys[3]), "{xmm13}"(keys[2]), "{xmm14}"(keys[1]), "{xmm15}"(keys[0]) : : "intel", "alignstack" ); } } } #[cfg(test)] mod test_expand;