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use super::BlockCipher; use des::{Des, gen_keys}; use byte_tools::{read_u64_be, write_u64_be}; use generic_array::GenericArray; use generic_array::typenum::{U1, U8, U16, U24}; use core::fmt; #[derive(Copy, Clone)] pub struct TdesEde3 { d1: Des, d2: Des, d3: Des, } #[derive(Copy, Clone)] pub struct TdesEee3 { d1: Des, d2: Des, d3: Des, } #[derive(Copy, Clone)] pub struct TdesEde2 { d1: Des, d2: Des, } #[derive(Copy, Clone)] pub struct TdesEee2 { d1: Des, d2: Des, } impl BlockCipher for TdesEde3 { type KeySize = U24; type BlockSize = U8; type ParBlocks = U1; fn new(key: &GenericArray<u8, U24>) -> Self { let d1 = Des { keys: gen_keys(read_u64_be(&key[0..8])) }; let d2 = Des { keys: gen_keys(read_u64_be(&key[8..16])) }; let d3 = Des { keys: gen_keys(read_u64_be(&key[16..24])) }; Self { d1, d2, d3 } } fn encrypt_block(&self, block: &mut GenericArray<u8, U8>) { let mut data = read_u64_be(block); data = self.d1.encrypt(data); data = self.d2.decrypt(data); data = self.d3.encrypt(data); write_u64_be(block, data); } fn decrypt_block(&self, block: &mut GenericArray<u8, U8>) { let mut data = read_u64_be(block); data = self.d3.decrypt(data); data = self.d2.encrypt(data); data = self.d1.decrypt(data); write_u64_be(block, data); } } impl BlockCipher for TdesEee3 { type KeySize = U24; type BlockSize = U8; type ParBlocks = U1; fn new(key: &GenericArray<u8, U24>) -> Self { let d1 = Des { keys: gen_keys(read_u64_be(&key[0..8])) }; let d2 = Des { keys: gen_keys(read_u64_be(&key[8..16])) }; let d3 = Des { keys: gen_keys(read_u64_be(&key[16..24])) }; Self { d1, d2, d3 } } fn encrypt_block(&self, block: &mut GenericArray<u8, U8>) { let mut data = read_u64_be(block); data = self.d1.encrypt(data); data = self.d2.encrypt(data); data = self.d3.encrypt(data); write_u64_be(block, data); } fn decrypt_block(&self, block: &mut GenericArray<u8, U8>) { let mut data = read_u64_be(block); data = self.d3.decrypt(data); data = self.d2.decrypt(data); data = self.d1.decrypt(data); write_u64_be(block, data); } } impl BlockCipher for TdesEde2 { type KeySize = U16; type BlockSize = U8; type ParBlocks = U1; fn new(key: &GenericArray<u8, U16>) -> Self { let d1 = Des { keys: gen_keys(read_u64_be(&key[0..8])) }; let d2 = Des { keys: gen_keys(read_u64_be(&key[8..16])) }; Self { d1, d2 } } fn encrypt_block(&self, block: &mut GenericArray<u8, U8>) { let mut data = read_u64_be(block); data = self.d1.encrypt(data); data = self.d2.decrypt(data); data = self.d1.encrypt(data); write_u64_be(block, data); } fn decrypt_block(&self, block: &mut GenericArray<u8, U8>) { let mut data = read_u64_be(block); data = self.d1.decrypt(data); data = self.d2.encrypt(data); data = self.d1.decrypt(data); write_u64_be(block, data); } } impl BlockCipher for TdesEee2 { type KeySize = U16; type BlockSize = U8; type ParBlocks = U1; fn new(key: &GenericArray<u8, U16>) -> Self { let d1 = Des { keys: gen_keys(read_u64_be(&key[0..8])) }; let d2 = Des { keys: gen_keys(read_u64_be(&key[8..16])) }; Self { d1, d2 } } fn encrypt_block(&self, block: &mut GenericArray<u8, U8>) { let mut data = read_u64_be(block); data = self.d1.encrypt(data); data = self.d2.encrypt(data); data = self.d1.encrypt(data); write_u64_be(block, data); } fn decrypt_block(&self, block: &mut GenericArray<u8, U8>) { let mut data = read_u64_be(block); data = self.d1.decrypt(data); data = self.d2.decrypt(data); data = self.d1.decrypt(data); write_u64_be(block, data); } } impl_opaque_debug!(TdesEde3); impl_opaque_debug!(TdesEee3); impl_opaque_debug!(TdesEde2); impl_opaque_debug!(TdesEee2);