| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| /// This is an implementaiton of GHASH as used in GCM [1]. |
| /// It is defined as GHASH(H, A, C), where H is a MAC key, A is authenticated data, |
| /// and C is the ciphertext. GHASH can be used as a keyed MAC, if C is left empty. |
| /// |
| /// In order to ensure constant time computation it uses the approach described in [2] section 5.2. |
| /// |
| /// [1] - "The Galois/Counter Mode of Operation (GCM)" - David A. McGrew and John Viega |
| /// <http://csrc.nist.gov/groups/ST/toolkit/BCM/documents/proposedmodes/gcm/gcm-spec.pdf> |
| /// [2] - "Faster and Timing-Attack Resistant AES-GCM" - Emilia Käsper and Peter Schwabe |
| /// <http://cryptojedi.org/papers/aesbs-20090616.pdf> |
| |
| use std::ops::BitXor; |
| use std::mem; |
| use cryptoutil::copy_memory; |
| |
| use cryptoutil::{read_u32_be, write_u32_be}; |
| use mac::{Mac, MacResult}; |
| use simd; |
| |
| // A struct representing an element in GF(2^128) |
| // x^0 is the msb, while x^127 is the lsb |
| #[derive(Clone, Copy)] |
| struct Gf128 { d: simd::u32x4 } |
| |
| impl Gf128 { |
| fn new(a: u32, b: u32, c: u32, d: u32) -> Gf128 { |
| Gf128 { d: simd::u32x4(a, b, c, d) } |
| } |
| |
| fn from_bytes(bytes: &[u8]) -> Gf128 { |
| assert!(bytes.len() == 16); |
| let d = read_u32_be(&bytes[0..4]); |
| let c = read_u32_be(&bytes[4..8]); |
| let b = read_u32_be(&bytes[8..12]); |
| let a = read_u32_be(&bytes[12..16]); |
| Gf128::new(a, b, c, d) |
| } |
| |
| fn to_bytes(&self) -> [u8; 16] { |
| let simd::u32x4(a, b, c, d) = self.d; |
| let mut result: [u8; 16] = unsafe { mem::uninitialized() }; |
| |
| write_u32_be(&mut result[0..4], d); |
| write_u32_be(&mut result[4..8], c); |
| write_u32_be(&mut result[8..12], b); |
| write_u32_be(&mut result[12..16], a); |
| |
| result |
| } |
| |
| // Multiply the element by x modulo x^128 |
| // This is equivalent to a rightshift in the bit representation |
| fn times_x(self) -> Gf128 { |
| let simd::u32x4(a, b, c, d) = self.d; |
| Gf128::new(a >> 1 | b << 31, b >> 1 | c << 31, c >> 1 | d << 31, d >> 1) |
| } |
| |
| // Multiply the element by x modulo x^128 + x^7 + x^2 + x + 1 |
| // This is equivalent to a rightshift, followed by an XOR iff the lsb was set, |
| // in the bit representation |
| fn times_x_reduce(self) -> Gf128 { |
| let r = Gf128::new(0, 0, 0, 0b1110_0001 << 24); |
| self.cond_xor(r, self.times_x()) |
| } |
| |
| // Adds y, and multiplies with h using a precomputed array of the values h * x^0 to h * x^127 |
| fn add_and_mul(&mut self, y: Gf128, hs: &[Gf128; 128]) { |
| *self = *self ^ y; |
| let mut x = mem::replace(self, Gf128::new(0, 0, 0, 0)); |
| |
| for &y in hs.iter().rev() { |
| *self = x.cond_xor(y, *self); |
| x = x.times_x(); |
| } |
| } |
| |
| // This XORs the value of y with x if the LSB of self is set, otherwise y is returned |
| fn cond_xor(self, x: Gf128, y: Gf128) -> Gf128 { |
| use simd::SimdExt; |
| let lsb = simd::u32x4(1, 0, 0, 0); |
| let simd::u32x4(m, _, _, _) = (self.d & lsb).simd_eq(lsb); |
| let mask = simd::u32x4(m, m, m, m); |
| Gf128 { d: (x.d & mask) ^ y.d } |
| } |
| } |
| |
| impl BitXor for Gf128 { |
| type Output = Gf128; |
| |
| fn bitxor(self, rhs: Gf128) -> Gf128 { |
| Gf128 { d: self.d ^ rhs.d } |
| } |
| } |
| |
| /// A structure representing the state of a GHASH computation |
| #[derive(Copy)] |
| pub struct Ghash { |
| hs: [Gf128; 128], |
| state: Gf128, |
| a_len: usize, |
| rest: Option<[u8; 16]>, |
| finished: bool |
| } |
| |
| impl Clone for Ghash { fn clone(&self) -> Ghash { *self } } |
| |
| /// A structure representing the state of a GHASH computation, after input for C was provided |
| #[derive(Copy)] |
| pub struct GhashWithC { |
| hs: [Gf128; 128], |
| state: Gf128, |
| a_len: usize, |
| c_len: usize, |
| rest: Option<[u8; 16]> |
| } |
| |
| impl Clone for GhashWithC { fn clone(&self) -> GhashWithC { *self } } |
| |
| fn update(state: &mut Gf128, len: &mut usize, data: &[u8], srest: &mut Option<[u8; 16]>, |
| hs: &[Gf128; 128]) { |
| let rest_len = *len % 16; |
| let data_len = data.len(); |
| *len += data_len; |
| |
| let data = match srest.take() { |
| None => data, |
| Some(mut rest) => { |
| if 16 - rest_len > data_len { |
| copy_memory(data, &mut rest[rest_len..]); |
| *srest = Some(rest); |
| return; |
| } |
| |
| let (fill, data) = data.split_at(16 - rest_len); |
| copy_memory(fill, &mut rest[rest_len..]); |
| state.add_and_mul(Gf128::from_bytes(&rest), hs); |
| data |
| } |
| }; |
| |
| let (data, rest) = data.split_at(data_len - data_len % 16); |
| |
| for chunk in data.chunks(16) { |
| let x = Gf128::from_bytes(chunk); |
| state.add_and_mul(x, hs); |
| } |
| |
| if rest.len() != 0 { |
| let mut tmp = [0; 16]; |
| copy_memory(rest, &mut tmp); |
| *srest = Some(tmp); |
| } |
| } |
| |
| impl Ghash { |
| /// Creates a new GHASH state, with `h` as the key |
| #[inline] |
| pub fn new(h: &[u8]) -> Ghash { |
| assert!(h.len() == 16); |
| let mut table: [Gf128; 128] = unsafe { mem::uninitialized() }; |
| |
| // Precompute values for h * x^0 to h * x^127 |
| let mut h = Gf128::from_bytes(h); |
| for poly in table.iter_mut() { |
| *poly = h; |
| h = h.times_x_reduce(); |
| } |
| |
| Ghash { |
| hs: table, |
| state: Gf128::new(0, 0, 0, 0), |
| a_len: 0, |
| rest: None, |
| finished: false |
| } |
| } |
| |
| fn flush(&mut self) { |
| for rest in self.rest.take().iter() { |
| self.state.add_and_mul(Gf128::from_bytes(rest), &self.hs); |
| } |
| } |
| |
| /// Feeds data for GHASH's A input |
| #[inline] |
| pub fn input_a(mut self, a: &[u8]) -> Ghash { |
| assert!(!self.finished); |
| update(&mut self.state, &mut self.a_len, a, &mut self.rest, &self.hs); |
| self |
| } |
| |
| /// Feeds data for GHASH's C input |
| #[inline] |
| pub fn input_c(mut self, c: &[u8]) -> GhashWithC { |
| assert!(!self.finished); |
| self.flush(); |
| |
| let mut c_len = 0; |
| update(&mut self.state, &mut c_len, c, &mut self.rest, &self.hs); |
| |
| let Ghash { hs, state, a_len, rest, .. } = self; |
| GhashWithC { |
| hs: hs, |
| state: state, |
| a_len: a_len, |
| c_len: c_len, |
| rest: rest |
| } |
| } |
| |
| /// Retrieve the digest result |
| #[inline] |
| pub fn result(mut self) -> [u8; 16] { |
| if !self.finished { |
| self.flush(); |
| |
| let a_len = self.a_len as u64 * 8; |
| let lens = Gf128::new(0, 0, a_len as u32, (a_len >> 32) as u32); |
| self.state.add_and_mul(lens, &self.hs); |
| |
| self.finished = true; |
| } |
| |
| self.state.to_bytes() |
| } |
| } |
| |
| impl GhashWithC { |
| /// Feeds data for GHASH's C input |
| #[inline] |
| pub fn input_c(mut self, c: &[u8]) -> GhashWithC { |
| update(&mut self.state, &mut self.c_len, c, &mut self.rest, &self.hs); |
| self |
| } |
| |
| /// Retrieve the digest result |
| #[inline] |
| pub fn result(mut self) -> [u8; 16] { |
| for rest in self.rest.take().iter() { |
| self.state.add_and_mul(Gf128::from_bytes(rest), &self.hs); |
| } |
| |
| let a_len = self.a_len as u64 * 8; |
| let c_len = self.c_len as u64 * 8; |
| let lens = Gf128::new(c_len as u32, (c_len >> 32) as u32, |
| a_len as u32, (a_len >> 32) as u32); |
| self.state.add_and_mul(lens, &self.hs); |
| |
| self.state.to_bytes() |
| } |
| } |
| |
| impl Mac for Ghash { |
| fn input(&mut self, data: &[u8]) { |
| assert!(!self.finished); |
| update(&mut self.state, &mut self.a_len, data, &mut self.rest, &self.hs); |
| } |
| |
| fn reset(&mut self) { |
| self.state = Gf128::new(0, 0, 0, 0); |
| self.a_len = 0; |
| self.rest = None; |
| self.finished = false; |
| } |
| |
| fn result(&mut self) -> MacResult { |
| let mut mac = [0u8; 16]; |
| self.raw_result(&mut mac[..]); |
| MacResult::new(&mac[..]) |
| } |
| |
| fn raw_result(&mut self, output: &mut [u8]) { |
| assert!(output.len() >= 16); |
| if !self.finished { |
| self.flush(); |
| |
| let a_len = self.a_len as u64 * 8; |
| let lens = Gf128::new(0, 0, a_len as u32, (a_len >> 32) as u32); |
| self.state.add_and_mul(lens, &self.hs); |
| |
| self.finished = true; |
| } |
| |
| copy_memory(&self.state.to_bytes(), output); |
| } |
| |
| fn output_bytes(&self) -> usize { 16 } |
| } |
| |
| #[cfg(test)] |
| mod test { |
| use ghash::Ghash; |
| |
| // Test cases from: |
| // <http://csrc.nist.gov/groups/ST/toolkit/BCM/documents/proposedmodes/gcm/gcm-spec.pdf> |
| static CASES: &'static [(&'static [u8], &'static [u8], &'static [u8], &'static [u8])] = &[ |
| // Format: (H, A, C, GHASH(H, A, C)) |
| |
| // Test 1 |
| (&[0x66, 0xe9, 0x4b, 0xd4, 0xef, 0x8a, 0x2c, 0x3b, |
| 0x88, 0x4c, 0xfa, 0x59, 0xca, 0x34, 0x2b, 0x2e], |
| &[], |
| &[], |
| &[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]), |
| |
| // Test 2 |
| (&[0x66, 0xe9, 0x4b, 0xd4, 0xef, 0x8a, 0x2c, 0x3b, |
| 0x88, 0x4c, 0xfa, 0x59, 0xca, 0x34, 0x2b, 0x2e], |
| &[], |
| &[0x03, 0x88, 0xda, 0xce, 0x60, 0xb6, 0xa3, 0x92, |
| 0xf3, 0x28, 0xc2, 0xb9, 0x71, 0xb2, 0xfe, 0x78], |
| &[0xf3, 0x8c, 0xbb, 0x1a, 0xd6, 0x92, 0x23, 0xdc, |
| 0xc3, 0x45, 0x7a, 0xe5, 0xb6, 0xb0, 0xf8, 0x85]), |
| |
| // Test 3 |
| (&[0xb8, 0x3b, 0x53, 0x37, 0x08, 0xbf, 0x53, 0x5d, |
| 0x0a, 0xa6, 0xe5, 0x29, 0x80, 0xd5, 0x3b, 0x78], |
| &[], |
| &[0x42, 0x83, 0x1e, 0xc2, 0x21, 0x77, 0x74, 0x24, 0x4b, 0x72, 0x21, 0xb7, 0x84, 0xd0, |
| 0xd4, 0x9c, 0xe3, 0xaa, 0x21, 0x2f, 0x2c, 0x02, 0xa4, 0xe0, 0x35, 0xc1, 0x7e, 0x23, |
| 0x29, 0xac, 0xa1, 0x2e, 0x21, 0xd5, 0x14, 0xb2, 0x54, 0x66, 0x93, 0x1c, 0x7d, 0x8f, |
| 0x6a, 0x5a, 0xac, 0x84, 0xaa, 0x05, 0x1b, 0xa3, 0x0b, 0x39, 0x6a, 0x0a, 0xac, 0x97, |
| 0x3d, 0x58, 0xe0, 0x91, 0x47, 0x3f, 0x59, 0x85], |
| &[0x7f, 0x1b, 0x32, 0xb8, 0x1b, 0x82, 0x0d, 0x02, |
| 0x61, 0x4f, 0x88, 0x95, 0xac, 0x1d, 0x4e, 0xac]), |
| |
| // Test 4 |
| (&[0xb8, 0x3b, 0x53, 0x37, 0x08, 0xbf, 0x53, 0x5d, |
| 0x0a, 0xa6, 0xe5, 0x29, 0x80, 0xd5, 0x3b, 0x78], |
| &[0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef, 0xfe, 0xed, |
| 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef, 0xab, 0xad, 0xda, 0xd2], |
| &[0x42, 0x83, 0x1e, 0xc2, 0x21, 0x77, 0x74, 0x24, 0x4b, 0x72, 0x21, 0xb7, 0x84, 0xd0, |
| 0xd4, 0x9c, 0xe3, 0xaa, 0x21, 0x2f, 0x2c, 0x02, 0xa4, 0xe0, 0x35, 0xc1, 0x7e, 0x23, |
| 0x29, 0xac, 0xa1, 0x2e, 0x21, 0xd5, 0x14, 0xb2, 0x54, 0x66, 0x93, 0x1c, 0x7d, 0x8f, |
| 0x6a, 0x5a, 0xac, 0x84, 0xaa, 0x05, 0x1b, 0xa3, 0x0b, 0x39, 0x6a, 0x0a, 0xac, 0x97, |
| 0x3d, 0x58, 0xe0, 0x91], |
| &[0x69, 0x8e, 0x57, 0xf7, 0x0e, 0x6e, 0xcc, 0x7f, |
| 0xd9, 0x46, 0x3b, 0x72, 0x60, 0xa9, 0xae, 0x5f]), |
| |
| // Test 5 |
| (&[0xb8, 0x3b, 0x53, 0x37, 0x08, 0xbf, 0x53, 0x5d, |
| 0x0a, 0xa6, 0xe5, 0x29, 0x80, 0xd5, 0x3b, 0x78], |
| &[0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef, 0xfe, 0xed, |
| 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef, 0xab, 0xad, 0xda, 0xd2], |
| &[0x61, 0x35, 0x3b, 0x4c, 0x28, 0x06, 0x93, 0x4a, 0x77, 0x7f, 0xf5, 0x1f, 0xa2, 0x2a, |
| 0x47, 0x55, 0x69, 0x9b, 0x2a, 0x71, 0x4f, 0xcd, 0xc6, 0xf8, 0x37, 0x66, 0xe5, 0xf9, |
| 0x7b, 0x6c, 0x74, 0x23, 0x73, 0x80, 0x69, 0x00, 0xe4, 0x9f, 0x24, 0xb2, 0x2b, 0x09, |
| 0x75, 0x44, 0xd4, 0x89, 0x6b, 0x42, 0x49, 0x89, 0xb5, 0xe1, 0xeb, 0xac, 0x0f, 0x07, |
| 0xc2, 0x3f, 0x45, 0x98], |
| &[0xdf, 0x58, 0x6b, 0xb4, 0xc2, 0x49, 0xb9, 0x2c, |
| 0xb6, 0x92, 0x28, 0x77, 0xe4, 0x44, 0xd3, 0x7b]), |
| |
| // Test 6 |
| (&[0xb8, 0x3b, 0x53, 0x37, 0x08, 0xbf, 0x53, 0x5d, |
| 0x0a, 0xa6, 0xe5, 0x29, 0x80, 0xd5, 0x3b, 0x78], |
| &[0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef, 0xfe, 0xed, |
| 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef, 0xab, 0xad, 0xda, 0xd2], |
| &[0x8c, 0xe2, 0x49, 0x98, 0x62, 0x56, 0x15, 0xb6, 0x03, 0xa0, 0x33, 0xac, 0xa1, 0x3f, |
| 0xb8, 0x94, 0xbe, 0x91, 0x12, 0xa5, 0xc3, 0xa2, 0x11, 0xa8, 0xba, 0x26, 0x2a, 0x3c, |
| 0xca, 0x7e, 0x2c, 0xa7, 0x01, 0xe4, 0xa9, 0xa4, 0xfb, 0xa4, 0x3c, 0x90, 0xcc, 0xdc, |
| 0xb2, 0x81, 0xd4, 0x8c, 0x7c, 0x6f, 0xd6, 0x28, 0x75, 0xd2, 0xac, 0xa4, 0x17, 0x03, |
| 0x4c, 0x34, 0xae, 0xe5], |
| &[0x1c, 0x5a, 0xfe, 0x97, 0x60, 0xd3, 0x93, 0x2f, |
| 0x3c, 0x9a, 0x87, 0x8a, 0xac, 0x3d, 0xc3, 0xde]), |
| |
| // Test 7 |
| (&[0xaa, 0xe0, 0x69, 0x92, 0xac, 0xbf, 0x52, 0xa3, |
| 0xe8, 0xf4, 0xa9, 0x6e, 0xc9, 0x30, 0x0b, 0xd7], |
| &[], |
| &[], |
| &[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]), |
| |
| // Test 8 |
| (&[0xaa, 0xe0, 0x69, 0x92, 0xac, 0xbf, 0x52, 0xa3, |
| 0xe8, 0xf4, 0xa9, 0x6e, 0xc9, 0x30, 0x0b, 0xd7], |
| &[], |
| &[0x98, 0xe7, 0x24, 0x7c, 0x07, 0xf0, 0xfe, 0x41, |
| 0x1c, 0x26, 0x7e, 0x43, 0x84, 0xb0, 0xf6, 0x00], |
| &[0xe2, 0xc6, 0x3f, 0x0a, 0xc4, 0x4a, 0xd0, 0xe0, |
| 0x2e, 0xfa, 0x05, 0xab, 0x67, 0x43, 0xd4, 0xce]), |
| |
| // Test 9 |
| (&[0x46, 0x69, 0x23, 0xec, 0x9a, 0xe6, 0x82, 0x21, |
| 0x4f, 0x2c, 0x08, 0x2b, 0xad, 0xb3, 0x92, 0x49], |
| &[], |
| &[0x39, 0x80, 0xca, 0x0b, 0x3c, 0x00, 0xe8, 0x41, 0xeb, 0x06, 0xfa, 0xc4, 0x87, 0x2a, |
| 0x27, 0x57, 0x85, 0x9e, 0x1c, 0xea, 0xa6, 0xef, 0xd9, 0x84, 0x62, 0x85, 0x93, 0xb4, |
| 0x0c, 0xa1, 0xe1, 0x9c, 0x7d, 0x77, 0x3d, 0x00, 0xc1, 0x44, 0xc5, 0x25, 0xac, 0x61, |
| 0x9d, 0x18, 0xc8, 0x4a, 0x3f, 0x47, 0x18, 0xe2, 0x44, 0x8b, 0x2f, 0xe3, 0x24, 0xd9, |
| 0xcc, 0xda, 0x27, 0x10, 0xac, 0xad, 0xe2, 0x56], |
| &[0x51, 0x11, 0x0d, 0x40, 0xf6, 0xc8, 0xff, 0xf0, |
| 0xeb, 0x1a, 0xe3, 0x34, 0x45, 0xa8, 0x89, 0xf0]), |
| |
| // Test 10 |
| (&[0x46, 0x69, 0x23, 0xec, 0x9a, 0xe6, 0x82, 0x21, |
| 0x4f, 0x2c, 0x08, 0x2b, 0xad, 0xb3, 0x92, 0x49], |
| &[0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef, 0xfe, 0xed, |
| 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef, 0xab, 0xad, 0xda, 0xd2], |
| &[0x39, 0x80, 0xca, 0x0b, 0x3c, 0x00, 0xe8, 0x41, 0xeb, 0x06, 0xfa, 0xc4, 0x87, 0x2a, |
| 0x27, 0x57, 0x85, 0x9e, 0x1c, 0xea, 0xa6, 0xef, 0xd9, 0x84, 0x62, 0x85, 0x93, 0xb4, |
| 0x0c, 0xa1, 0xe1, 0x9c, 0x7d, 0x77, 0x3d, 0x00, 0xc1, 0x44, 0xc5, 0x25, 0xac, 0x61, |
| 0x9d, 0x18, 0xc8, 0x4a, 0x3f, 0x47, 0x18, 0xe2, 0x44, 0x8b, 0x2f, 0xe3, 0x24, 0xd9, |
| 0xcc, 0xda, 0x27, 0x10], |
| &[0xed, 0x2c, 0xe3, 0x06, 0x2e, 0x4a, 0x8e, 0xc0, |
| 0x6d, 0xb8, 0xb4, 0xc4, 0x90, 0xe8, 0xa2, 0x68]), |
| |
| // Test 11 |
| (&[0x46, 0x69, 0x23, 0xec, 0x9a, 0xe6, 0x82, 0x21, |
| 0x4f, 0x2c, 0x08, 0x2b, 0xad, 0xb3, 0x92, 0x49], |
| &[0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef, 0xfe, 0xed, |
| 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef, 0xab, 0xad, 0xda, 0xd2], |
| &[0x0f, 0x10, 0xf5, 0x99, 0xae, 0x14, 0xa1, 0x54, 0xed, 0x24, 0xb3, 0x6e, 0x25, 0x32, |
| 0x4d, 0xb8, 0xc5, 0x66, 0x63, 0x2e, 0xf2, 0xbb, 0xb3, 0x4f, 0x83, 0x47, 0x28, 0x0f, |
| 0xc4, 0x50, 0x70, 0x57, 0xfd, 0xdc, 0x29, 0xdf, 0x9a, 0x47, 0x1f, 0x75, 0xc6, 0x65, |
| 0x41, 0xd4, 0xd4, 0xda, 0xd1, 0xc9, 0xe9, 0x3a, 0x19, 0xa5, 0x8e, 0x8b, 0x47, 0x3f, |
| 0xa0, 0xf0, 0x62, 0xf7], |
| &[0x1e, 0x6a, 0x13, 0x38, 0x06, 0x60, 0x78, 0x58, |
| 0xee, 0x80, 0xea, 0xf2, 0x37, 0x06, 0x40, 0x89]), |
| |
| // Test 12 |
| (&[0x46, 0x69, 0x23, 0xec, 0x9a, 0xe6, 0x82, 0x21, |
| 0x4f, 0x2c, 0x08, 0x2b, 0xad, 0xb3, 0x92, 0x49], |
| &[0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef, 0xfe, 0xed, |
| 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef, 0xab, 0xad, 0xda, 0xd2], |
| &[0xd2, 0x7e, 0x88, 0x68, 0x1c, 0xe3, 0x24, 0x3c, 0x48, 0x30, 0x16, 0x5a, 0x8f, 0xdc, |
| 0xf9, 0xff, 0x1d, 0xe9, 0xa1, 0xd8, 0xe6, 0xb4, 0x47, 0xef, 0x6e, 0xf7, 0xb7, 0x98, |
| 0x28, 0x66, 0x6e, 0x45, 0x81, 0xe7, 0x90, 0x12, 0xaf, 0x34, 0xdd, 0xd9, 0xe2, 0xf0, |
| 0x37, 0x58, 0x9b, 0x29, 0x2d, 0xb3, 0xe6, 0x7c, 0x03, 0x67, 0x45, 0xfa, 0x22, 0xe7, |
| 0xe9, 0xb7, 0x37, 0x3b], |
| &[0x82, 0x56, 0x7f, 0xb0, 0xb4, 0xcc, 0x37, 0x18, |
| 0x01, 0xea, 0xde, 0xc0, 0x05, 0x96, 0x8e, 0x94]), |
| |
| // Test 13 |
| (&[0xdc, 0x95, 0xc0, 0x78, 0xa2, 0x40, 0x89, 0x89, |
| 0xad, 0x48, 0xa2, 0x14, 0x92, 0x84, 0x20, 0x87], |
| &[], |
| &[], |
| &[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]), |
| |
| // Test 14 |
| (&[0xdc, 0x95, 0xc0, 0x78, 0xa2, 0x40, 0x89, 0x89, |
| 0xad, 0x48, 0xa2, 0x14, 0x92, 0x84, 0x20, 0x87], |
| &[], |
| &[0xce, 0xa7, 0x40, 0x3d, 0x4d, 0x60, 0x6b, 0x6e, |
| 0x07, 0x4e, 0xc5, 0xd3, 0xba, 0xf3, 0x9d, 0x18], |
| &[0x83, 0xde, 0x42, 0x5c, 0x5e, 0xdc, 0x5d, 0x49, |
| 0x8f, 0x38, 0x2c, 0x44, 0x10, 0x41, 0xca, 0x92]), |
| |
| // Test 15 |
| (&[0xac, 0xbe, 0xf2, 0x05, 0x79, 0xb4, 0xb8, 0xeb, |
| 0xce, 0x88, 0x9b, 0xac, 0x87, 0x32, 0xda, 0xd7], |
| &[], |
| &[0x52, 0x2d, 0xc1, 0xf0, 0x99, 0x56, 0x7d, 0x07, 0xf4, 0x7f, 0x37, 0xa3, 0x2a, 0x84, |
| 0x42, 0x7d, 0x64, 0x3a, 0x8c, 0xdc, 0xbf, 0xe5, 0xc0, 0xc9, 0x75, 0x98, 0xa2, 0xbd, |
| 0x25, 0x55, 0xd1, 0xaa, 0x8c, 0xb0, 0x8e, 0x48, 0x59, 0x0d, 0xbb, 0x3d, 0xa7, 0xb0, |
| 0x8b, 0x10, 0x56, 0x82, 0x88, 0x38, 0xc5, 0xf6, 0x1e, 0x63, 0x93, 0xba, 0x7a, 0x0a, |
| 0xbc, 0xc9, 0xf6, 0x62, 0x89, 0x80, 0x15, 0xad], |
| &[0x4d, 0xb8, 0x70, 0xd3, 0x7c, 0xb7, 0x5f, 0xcb, |
| 0x46, 0x09, 0x7c, 0x36, 0x23, 0x0d, 0x16, 0x12]), |
| |
| // Test 16 |
| (&[0xac, 0xbe, 0xf2, 0x05, 0x79, 0xb4, 0xb8, 0xeb, |
| 0xce, 0x88, 0x9b, 0xac, 0x87, 0x32, 0xda, 0xd7], |
| &[0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef, 0xfe, 0xed, |
| 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef, 0xab, 0xad, 0xda, 0xd2], |
| &[0x52, 0x2d, 0xc1, 0xf0, 0x99, 0x56, 0x7d, 0x07, 0xf4, 0x7f, 0x37, 0xa3, 0x2a, 0x84, |
| 0x42, 0x7d, 0x64, 0x3a, 0x8c, 0xdc, 0xbf, 0xe5, 0xc0, 0xc9, 0x75, 0x98, 0xa2, 0xbd, |
| 0x25, 0x55, 0xd1, 0xaa, 0x8c, 0xb0, 0x8e, 0x48, 0x59, 0x0d, 0xbb, 0x3d, 0xa7, 0xb0, |
| 0x8b, 0x10, 0x56, 0x82, 0x88, 0x38, 0xc5, 0xf6, 0x1e, 0x63, 0x93, 0xba, 0x7a, 0x0a, |
| 0xbc, 0xc9, 0xf6, 0x62], |
| &[0x8b, 0xd0, 0xc4, 0xd8, 0xaa, 0xcd, 0x39, 0x1e, |
| 0x67, 0xcc, 0xa4, 0x47, 0xe8, 0xc3, 0x8f, 0x65]), |
| |
| // Test 17 |
| (&[0xac, 0xbe, 0xf2, 0x05, 0x79, 0xb4, 0xb8, 0xeb, |
| 0xce, 0x88, 0x9b, 0xac, 0x87, 0x32, 0xda, 0xd7], |
| &[0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef, 0xfe, 0xed, |
| 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef, 0xab, 0xad, 0xda, 0xd2], |
| &[0xc3, 0x76, 0x2d, 0xf1, 0xca, 0x78, 0x7d, 0x32, 0xae, 0x47, 0xc1, 0x3b, 0xf1, 0x98, |
| 0x44, 0xcb, 0xaf, 0x1a, 0xe1, 0x4d, 0x0b, 0x97, 0x6a, 0xfa, 0xc5, 0x2f, 0xf7, 0xd7, |
| 0x9b, 0xba, 0x9d, 0xe0, 0xfe, 0xb5, 0x82, 0xd3, 0x39, 0x34, 0xa4, 0xf0, 0x95, 0x4c, |
| 0xc2, 0x36, 0x3b, 0xc7, 0x3f, 0x78, 0x62, 0xac, 0x43, 0x0e, 0x64, 0xab, 0xe4, 0x99, |
| 0xf4, 0x7c, 0x9b, 0x1f], |
| &[0x75, 0xa3, 0x42, 0x88, 0xb8, 0xc6, 0x8f, 0x81, |
| 0x1c, 0x52, 0xb2, 0xe9, 0xa2, 0xf9, 0x7f, 0x63]), |
| |
| // Test 18 |
| (&[0xac, 0xbe, 0xf2, 0x05, 0x79, 0xb4, 0xb8, 0xeb, |
| 0xce, 0x88, 0x9b, 0xac, 0x87, 0x32, 0xda, 0xd7], |
| &[0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef, 0xfe, 0xed, |
| 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef, 0xab, 0xad, 0xda, 0xd2], |
| &[0x5a, 0x8d, 0xef, 0x2f, 0x0c, 0x9e, 0x53, 0xf1, 0xf7, 0x5d, 0x78, 0x53, 0x65, 0x9e, |
| 0x2a, 0x20, 0xee, 0xb2, 0xb2, 0x2a, 0xaf, 0xde, 0x64, 0x19, 0xa0, 0x58, 0xab, 0x4f, |
| 0x6f, 0x74, 0x6b, 0xf4, 0x0f, 0xc0, 0xc3, 0xb7, 0x80, 0xf2, 0x44, 0x45, 0x2d, 0xa3, |
| 0xeb, 0xf1, 0xc5, 0xd8, 0x2c, 0xde, 0xa2, 0x41, 0x89, 0x97, 0x20, 0x0e, 0xf8, 0x2e, |
| 0x44, 0xae, 0x7e, 0x3f], |
| &[0xd5, 0xff, 0xcf, 0x6f, 0xc5, 0xac, 0x4d, 0x69, |
| 0x72, 0x21, 0x87, 0x42, 0x1a, 0x7f, 0x17, 0x0b]) |
| ]; |
| |
| #[test] |
| fn hash() { |
| for &(h, a, c, g) in CASES.iter() { |
| let ghash = Ghash::new(h); |
| assert_eq!(&ghash.input_a(a).input_c(c).result()[..], g); |
| } |
| } |
| |
| #[test] |
| fn split_input() { |
| for &(h, a, c, g) in CASES.iter() { |
| let ghash = Ghash::new(h); |
| let (a1, a2) = a.split_at(a.len() / 2); |
| let (c1, c2) = c.split_at(c.len() / 2); |
| assert_eq!(&ghash.input_a(a1) |
| .input_a(a2) |
| .input_c(c1) |
| .input_c(c2) |
| .result()[..], g); |
| } |
| } |
| } |
| |
| #[cfg(all(test, feature = "with-bench"))] |
| mod bench { |
| use test::Bencher; |
| use mac::Mac; |
| use ghash::Ghash; |
| |
| #[bench] |
| pub fn ghash_10(bh: & mut Bencher) { |
| let mut mac = [0u8; 16]; |
| let key = [0u8; 16]; |
| let bytes = [1u8; 10]; |
| bh.iter( || { |
| let mut ghash = Ghash::new(&key); |
| ghash.input(&bytes); |
| ghash.raw_result(&mut mac); |
| }); |
| bh.bytes = bytes.len() as u64; |
| } |
| |
| #[bench] |
| pub fn ghash_1k(bh: & mut Bencher) { |
| let mut mac = [0u8; 16]; |
| let key = [0u8; 16]; |
| let bytes = [1u8; 1024]; |
| bh.iter( || { |
| let mut ghash = Ghash::new(&key); |
| ghash.input(&bytes); |
| ghash.raw_result(&mut mac); |
| }); |
| bh.bytes = bytes.len() as u64; |
| } |
| |
| #[bench] |
| pub fn ghash_64k(bh: & mut Bencher) { |
| let mut mac = [0u8; 16]; |
| let key = [0u8; 16]; |
| let bytes = [1u8; 65536]; |
| bh.iter( || { |
| let mut ghash = Ghash::new(&key); |
| ghash.input(&bytes); |
| ghash.raw_result(&mut mac); |
| }); |
| bh.bytes = bytes.len() as u64; |
| } |
| } |
