cfb-mode-0.8.2/.cargo_vcs_info.json0000644000000001460000000000100125200ustar { "git": { "sha1": "7ba177e7b3e3098818b926759cc779fa77e0c1c8" }, "path_in_vcs": "cfb-mode" }cfb-mode-0.8.2/CHANGELOG.md000064400000000000000000000036531046102023000131270ustar 00000000000000# Changelog All notable changes to this project will be documented in this file. The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/) and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html). ## 0.8.2 (2022-09-13) ### Added - `BufferEncryptor` and `BufferDecryptor` types ([#19]) [#19]: https://github.com/RustCrypto/block-modes/pull/19 ## 0.8.1 (2022-02-17) ### Fixed - Minimal versions build ([#9]) [#9]: https://github.com/RustCrypto/block-modes/pull/9 ## 0.8.0 (2022-02-10) ### Changed - Update `cipher` dependency to v0.4 and move crate to the [RustCrypto/block-modes] repository ([#2]) [#2]: https://github.com/RustCrypto/block-modes/pull/2 [RustCrypto/block-modes]: https://github.com/RustCrypto/block-modes ## 0.7.1 (2021-04-30) ### Changed - Removed redundant `NewBlockCipher` bound from `FromBlockCipher` implementation ([#236]) [#236]: https://github.com/RustCrypto/stream-ciphers/pull/236 ## 0.7.0 (2021-04-29) ### Changed - Bump `cipher` dependency to v0.3 release ([#226]) - Bump `aes` dev dependency to v0.7 release ([#232]) [#226]: https://github.com/RustCrypto/stream-ciphers/pull/226 [#232]: https://github.com/RustCrypto/stream-ciphers/pull/232 ## 0.6.0 (2020-10-16) ### Changed - Replace `block-cipher`/`stream-cipher` with `cipher` crate ([#177]) [#177]: https://github.com/RustCrypto/stream-ciphers/pull/177 ## 0.5.0 (2020-08-25) ### Changed - Bump `stream-cipher` dependency to v0.7, implement the `FromBlockCipher` trait ([#161], [#164]) [#161]: https://github.com/RustCrypto/stream-ciphers/pull/161 [#164]: https://github.com/RustCrypto/stream-ciphers/pull/164 ## 0.4.0 (2020-06-08) ### Changed - Bump `stream-cipher` dependency to v0.4 ([#119]) - Upgrade to Rust 2018 edition ([#119]) [#119]: https://github.com/RustCrypto/stream-ciphers/pull/119 ## 0.3.2 (2019-03-11) ## 0.3.1 (2018-11-01) ## 0.3.0 (2018-11-01) ## 0.2.0 (2018-10-13) ## 0.1.0 (2018-10-01) cfb-mode-0.8.2/Cargo.toml0000644000000025600000000000100105200ustar # THIS FILE IS AUTOMATICALLY GENERATED BY CARGO # # When uploading crates to the registry Cargo will automatically # "normalize" Cargo.toml files for maximal compatibility # with all versions of Cargo and also rewrite `path` dependencies # to registry (e.g., crates.io) dependencies. # # If you are reading this file be aware that the original Cargo.toml # will likely look very different (and much more reasonable). # See Cargo.toml.orig for the original contents. [package] edition = "2021" rust-version = "1.56" name = "cfb-mode" version = "0.8.2" authors = ["RustCrypto Developers"] description = "Cipher Feedback (CFB) block cipher mode of operation" documentation = "https://docs.rs/cfb-mode" readme = "README.md" keywords = [ "crypto", "block-mode", "stream-cipher", "ciphers", ] categories = [ "cryptography", "no-std", ] license = "MIT OR Apache-2.0" repository = "https://github.com/RustCrypto/block-modes" resolver = "1" [package.metadata.docs.rs] all-features = true rustdoc-args = [ "--cfg", "docsrs", ] [dependencies.cipher] version = "0.4.2" [dev-dependencies.aes] version = "0.8" [dev-dependencies.cipher] version = "0.4.2" features = ["dev"] [dev-dependencies.hex-literal] version = "0.3" [features] alloc = ["cipher/alloc"] block-padding = ["cipher/block-padding"] std = [ "cipher/std", "alloc", ] zeroize = ["cipher/zeroize"] cfb-mode-0.8.2/Cargo.toml.orig0000644000000014410000000000100114540ustar [package] name = "cfb-mode" version = "0.8.2" description = "Cipher Feedback (CFB) block cipher mode of operation" authors = ["RustCrypto Developers"] license = "MIT OR Apache-2.0" edition = "2021" rust-version = "1.56" readme = "README.md" documentation = "https://docs.rs/cfb-mode" repository = "https://github.com/RustCrypto/block-modes" keywords = ["crypto", "block-mode", "stream-cipher", "ciphers"] categories = ["cryptography", "no-std"] [dependencies] cipher = "0.4.2" [dev-dependencies] aes = "0.8" cipher = { version = "0.4.2", features = ["dev"] } hex-literal = "0.3" [features] alloc = ["cipher/alloc"] std = ["cipher/std", "alloc"] block-padding = ["cipher/block-padding"] zeroize = ["cipher/zeroize"] [package.metadata.docs.rs] all-features = true rustdoc-args = ["--cfg", "docsrs"] cfb-mode-0.8.2/Cargo.toml.orig000064400000000000000000000014411046102023000141760ustar 00000000000000[package] name = "cfb-mode" version = "0.8.2" description = "Cipher Feedback (CFB) block cipher mode of operation" authors = ["RustCrypto Developers"] license = "MIT OR Apache-2.0" edition = "2021" rust-version = "1.56" readme = "README.md" documentation = "https://docs.rs/cfb-mode" repository = "https://github.com/RustCrypto/block-modes" keywords = ["crypto", "block-mode", "stream-cipher", "ciphers"] categories = ["cryptography", "no-std"] [dependencies] cipher = "0.4.2" [dev-dependencies] aes = "0.8" cipher = { version = "0.4.2", features = ["dev"] } hex-literal = "0.3" [features] alloc = ["cipher/alloc"] std = ["cipher/std", "alloc"] block-padding = ["cipher/block-padding"] zeroize = ["cipher/zeroize"] [package.metadata.docs.rs] all-features = true rustdoc-args = ["--cfg", "docsrs"] cfb-mode-0.8.2/LICENSE-APACHE000064400000000000000000000251411046102023000132360ustar 00000000000000 Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. 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See the License for the specific language governing permissions and limitations under the License. cfb-mode-0.8.2/LICENSE-MIT000064400000000000000000000021171046102023000127440ustar 00000000000000Copyright (c) 2018-2022 RustCrypto Developers Copyright (c) 2018 Artyom Pavlov Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. cfb-mode-0.8.2/README.md000064400000000000000000000043251046102023000125720ustar 00000000000000# RustCrypto: CFB [![crate][crate-image]][crate-link] [![Docs][docs-image]][docs-link] ![Apache2/MIT licensed][license-image] ![Rust Version][rustc-image] [![Project Chat][chat-image]][chat-link] [![Build Status][build-image]][build-link] Generic implementation of the [Cipher Feedback][CFB] (CFB) block cipher mode of operation. See [documentation][cipher-doc] of the `cipher` crate for additional information. ## Minimum Supported Rust Version Rust **1.56** or higher. Minimum supported Rust version can be changed in the future, but it will be done with a minor version bump. ## SemVer Policy - All on-by-default features of this library are covered by SemVer - MSRV is considered exempt from SemVer as noted above ## License Licensed under either of: * [Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0) * [MIT license](http://opensource.org/licenses/MIT) at your option. ### Contribution Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions. [//]: # (badges) [crate-image]: https://img.shields.io/crates/v/cfb-mode.svg [crate-link]: https://crates.io/crates/cfb-mode [docs-image]: https://docs.rs/cfb-mode/badge.svg [docs-link]: https://docs.rs/cfb-mode/ [license-image]: https://img.shields.io/badge/license-Apache2.0/MIT-blue.svg [rustc-image]: https://img.shields.io/badge/rustc-1.56+-blue.svg [chat-image]: https://img.shields.io/badge/zulip-join_chat-blue.svg [chat-link]: https://rustcrypto.zulipchat.com/#narrow/stream/308460-block-modes [build-image]: https://github.com/RustCrypto/block-modes/workflows/cfb-mode/badge.svg?branch=master&event=push [build-link]: https://github.com/RustCrypto/block-modes/actions?query=workflow%3Acfb-mode+branch%3Amaster [//]: # (general links) [CFB]: https://en.wikipedia.org/wiki/Block_cipher_mode_of_operation#Cipher_feedback_(CFB) [cipher-doc]: https://docs.rs/cipher/ cfb-mode-0.8.2/src/decrypt.rs000064400000000000000000000173231046102023000141240ustar 00000000000000use cipher::{ crypto_common::{InnerUser, IvSizeUser}, generic_array::{ArrayLength, GenericArray}, inout::InOut, AlgorithmName, AsyncStreamCipher, Block, BlockBackend, BlockCipher, BlockClosure, BlockDecrypt, BlockDecryptMut, BlockEncryptMut, BlockSizeUser, InnerIvInit, Iv, IvState, ParBlocks, ParBlocksSizeUser, Unsigned, }; use core::fmt; #[cfg(feature = "zeroize")] use cipher::zeroize::{Zeroize, ZeroizeOnDrop}; /// CFB mode decryptor. #[derive(Clone)] pub struct Decryptor where C: BlockEncryptMut + BlockCipher, { cipher: C, iv: Block, } /// CFB mode buffered decryptor. #[derive(Clone)] pub struct BufDecryptor where C: BlockEncryptMut + BlockCipher, { cipher: C, iv: Block, pos: usize, } impl BufDecryptor where C: BlockEncryptMut + BlockCipher, { /// Decrypt a buffer in multiple parts. pub fn decrypt(&mut self, mut data: &mut [u8]) { let bs = C::BlockSize::to_usize(); let n = data.len(); if n < bs - self.pos { xor_set2(data, &mut self.iv[self.pos..self.pos + n]); self.pos += n; return; } let (left, right) = { data }.split_at_mut(bs - self.pos); data = right; let mut iv = self.iv.clone(); xor_set2(left, &mut iv[self.pos..]); self.cipher.encrypt_block_mut(&mut iv); let mut chunks = data.chunks_exact_mut(bs); for chunk in &mut chunks { xor_set2(chunk, iv.as_mut_slice()); self.cipher.encrypt_block_mut(&mut iv); } let rem = chunks.into_remainder(); xor_set2(rem, iv.as_mut_slice()); self.pos = rem.len(); self.iv = iv; } /// Returns the current state (block and position) of the decryptor. pub fn get_state(&self) -> (&Block, usize) { (&self.iv, self.pos) } /// Restore from the given state for resumption. pub fn from_state(cipher: C, iv: &Block, pos: usize) -> Self { Self { cipher, iv: iv.clone(), pos, } } } impl BlockSizeUser for Decryptor where C: BlockEncryptMut + BlockCipher, { type BlockSize = C::BlockSize; } impl BlockDecryptMut for Decryptor where C: BlockEncryptMut + BlockCipher, { fn decrypt_with_backend_mut(&mut self, f: impl BlockClosure) { let Self { cipher, iv } = self; cipher.encrypt_with_backend_mut(Closure { iv, f }) } } impl AsyncStreamCipher for Decryptor where C: BlockEncryptMut + BlockCipher {} impl InnerUser for Decryptor where C: BlockEncryptMut + BlockCipher, { type Inner = C; } impl InnerUser for BufDecryptor where C: BlockEncryptMut + BlockCipher, { type Inner = C; } impl IvSizeUser for Decryptor where C: BlockEncryptMut + BlockCipher, { type IvSize = C::BlockSize; } impl IvSizeUser for BufDecryptor where C: BlockEncryptMut + BlockCipher, { type IvSize = C::BlockSize; } impl InnerIvInit for Decryptor where C: BlockEncryptMut + BlockCipher, { #[inline] fn inner_iv_init(mut cipher: C, iv: &Iv) -> Self { let mut iv = iv.clone(); cipher.encrypt_block_mut(&mut iv); Self { cipher, iv } } } impl InnerIvInit for BufDecryptor where C: BlockEncryptMut + BlockCipher, { #[inline] fn inner_iv_init(mut cipher: C, iv: &Iv) -> Self { let mut iv = iv.clone(); cipher.encrypt_block_mut(&mut iv); Self { cipher, iv, pos: 0 } } } impl IvState for Decryptor where C: BlockEncryptMut + BlockDecrypt + BlockCipher, { #[inline] fn iv_state(&self) -> Iv { let mut res = self.iv.clone(); self.cipher.decrypt_block(&mut res); res } } impl AlgorithmName for Decryptor where C: BlockEncryptMut + BlockCipher + AlgorithmName, { fn write_alg_name(f: &mut fmt::Formatter<'_>) -> fmt::Result { f.write_str("cfb::Decryptor<")?; ::write_alg_name(f)?; f.write_str(">") } } impl AlgorithmName for BufDecryptor where C: BlockEncryptMut + BlockCipher + AlgorithmName, { fn write_alg_name(f: &mut fmt::Formatter<'_>) -> fmt::Result { f.write_str("cfb::BufDecryptor<")?; ::write_alg_name(f)?; f.write_str(">") } } impl fmt::Debug for Decryptor where C: BlockEncryptMut + BlockCipher + AlgorithmName, { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { f.write_str("cfb::Decryptor<")?; ::write_alg_name(f)?; f.write_str("> { ... }") } } impl fmt::Debug for BufDecryptor where C: BlockEncryptMut + BlockCipher + AlgorithmName, { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { f.write_str("cfb::BufDecryptor<")?; ::write_alg_name(f)?; f.write_str("> { ... }") } } #[cfg(feature = "zeroize")] #[cfg_attr(docsrs, doc(cfg(feature = "zeroize")))] impl Drop for Decryptor { fn drop(&mut self) { self.iv.zeroize(); } } #[cfg(feature = "zeroize")] #[cfg_attr(docsrs, doc(cfg(feature = "zeroize")))] impl Drop for BufDecryptor { fn drop(&mut self) { self.iv.zeroize(); } } #[cfg(feature = "zeroize")] #[cfg_attr(docsrs, doc(cfg(feature = "zeroize")))] impl ZeroizeOnDrop for Decryptor {} #[cfg(feature = "zeroize")] #[cfg_attr(docsrs, doc(cfg(feature = "zeroize")))] impl ZeroizeOnDrop for BufDecryptor {} struct Closure<'a, BS, BC> where BS: ArrayLength, BC: BlockClosure, { iv: &'a mut GenericArray, f: BC, } impl<'a, BS, BC> BlockSizeUser for Closure<'a, BS, BC> where BS: ArrayLength, BC: BlockClosure, { type BlockSize = BS; } impl<'a, BS, BC> BlockClosure for Closure<'a, BS, BC> where BS: ArrayLength, BC: BlockClosure, { #[inline(always)] fn call>(self, backend: &mut B) { let Self { iv, f } = self; f.call(&mut Backend { iv, backend }); } } struct Backend<'a, BS, BK> where BS: ArrayLength, BK: BlockBackend, { iv: &'a mut GenericArray, backend: &'a mut BK, } impl<'a, BS, BK> BlockSizeUser for Backend<'a, BS, BK> where BS: ArrayLength, BK: BlockBackend, { type BlockSize = BS; } impl<'a, BS, BK> ParBlocksSizeUser for Backend<'a, BS, BK> where BS: ArrayLength, BK: BlockBackend, { type ParBlocksSize = BK::ParBlocksSize; } impl<'a, BS, BK> BlockBackend for Backend<'a, BS, BK> where BS: ArrayLength, BK: BlockBackend, { #[inline(always)] fn proc_block(&mut self, mut block: InOut<'_, '_, Block>) { let mut t = block.clone_in(); block.xor_in2out(self.iv); self.backend.proc_block((&mut t).into()); *self.iv = t; } #[inline(always)] fn proc_par_blocks(&mut self, mut blocks: InOut<'_, '_, ParBlocks>) { let mut t = ParBlocks::::default(); let b = (blocks.get_in(), &mut t).into(); self.backend.proc_par_blocks(b); let n = t.len(); blocks.get(0).xor_in2out(self.iv); for i in 1..n { blocks.get(i).xor_in2out(&t[i - 1]) } *self.iv = t[n - 1].clone(); } } #[inline(always)] fn xor_set2(buf1: &mut [u8], buf2: &mut [u8]) { for (a, b) in buf1.iter_mut().zip(buf2) { let t = *a; *a ^= *b; *b = t; } } cfb-mode-0.8.2/src/encrypt.rs000064400000000000000000000164041046102023000141350ustar 00000000000000use cipher::{ consts::U1, crypto_common::{InnerUser, IvSizeUser}, generic_array::{ArrayLength, GenericArray}, inout::InOut, AlgorithmName, AsyncStreamCipher, Block, BlockBackend, BlockCipher, BlockClosure, BlockDecrypt, BlockEncryptMut, BlockSizeUser, InnerIvInit, Iv, IvState, ParBlocksSizeUser, Unsigned, }; use core::fmt; #[cfg(feature = "zeroize")] use cipher::zeroize::{Zeroize, ZeroizeOnDrop}; /// CFB mode encryptor. #[derive(Clone)] pub struct Encryptor where C: BlockEncryptMut + BlockCipher, { cipher: C, iv: Block, } /// CFB mode buffered encryptor. #[derive(Clone)] pub struct BufEncryptor where C: BlockEncryptMut + BlockCipher, { cipher: C, iv: Block, pos: usize, } impl BufEncryptor where C: BlockEncryptMut + BlockCipher, { /// Encrypt a buffer in multiple parts. pub fn encrypt(&mut self, mut data: &mut [u8]) { let bs = C::BlockSize::USIZE; let n = data.len(); if n < bs - self.pos { xor_set1(data, &mut self.iv[self.pos..self.pos + n]); self.pos += n; return; } let (left, right) = { data }.split_at_mut(bs - self.pos); data = right; let mut iv = self.iv.clone(); xor_set1(left, &mut iv[self.pos..]); self.cipher.encrypt_block_mut(&mut iv); let mut chunks = data.chunks_exact_mut(bs); for chunk in &mut chunks { xor_set1(chunk, iv.as_mut_slice()); self.cipher.encrypt_block_mut(&mut iv); } let rem = chunks.into_remainder(); xor_set1(rem, iv.as_mut_slice()); self.pos = rem.len(); self.iv = iv; } /// Returns the current state (block and position) of the decryptor. pub fn get_state(&self) -> (&Block, usize) { (&self.iv, self.pos) } /// Restore from the given state for resumption. pub fn from_state(cipher: C, iv: &Block, pos: usize) -> Self { Self { cipher, iv: iv.clone(), pos, } } } impl BlockSizeUser for Encryptor where C: BlockEncryptMut + BlockCipher, { type BlockSize = C::BlockSize; } impl BlockEncryptMut for Encryptor where C: BlockEncryptMut + BlockCipher, { fn encrypt_with_backend_mut(&mut self, f: impl BlockClosure) { let Self { cipher, iv } = self; cipher.encrypt_with_backend_mut(Closure { iv, f }) } } impl AsyncStreamCipher for Encryptor where C: BlockEncryptMut + BlockCipher {} impl InnerUser for Encryptor where C: BlockEncryptMut + BlockCipher, { type Inner = C; } impl InnerUser for BufEncryptor where C: BlockEncryptMut + BlockCipher, { type Inner = C; } impl IvSizeUser for Encryptor where C: BlockEncryptMut + BlockCipher, { type IvSize = C::BlockSize; } impl IvSizeUser for BufEncryptor where C: BlockEncryptMut + BlockCipher, { type IvSize = C::BlockSize; } impl InnerIvInit for Encryptor where C: BlockEncryptMut + BlockCipher, { #[inline] fn inner_iv_init(mut cipher: C, iv: &Iv) -> Self { let mut iv = iv.clone(); cipher.encrypt_block_mut(&mut iv); Self { cipher, iv } } } impl InnerIvInit for BufEncryptor where C: BlockEncryptMut + BlockCipher, { #[inline] fn inner_iv_init(mut cipher: C, iv: &Iv) -> Self { let mut iv = iv.clone(); cipher.encrypt_block_mut(&mut iv); Self { cipher, iv, pos: 0 } } } impl IvState for Encryptor where C: BlockEncryptMut + BlockDecrypt + BlockCipher, { #[inline] fn iv_state(&self) -> Iv { let mut res = self.iv.clone(); self.cipher.decrypt_block(&mut res); res } } impl AlgorithmName for BufEncryptor where C: BlockEncryptMut + BlockCipher + AlgorithmName, { fn write_alg_name(f: &mut fmt::Formatter<'_>) -> fmt::Result { f.write_str("cfb::BufEncryptor<")?; ::write_alg_name(f)?; f.write_str(">") } } impl AlgorithmName for Encryptor where C: BlockEncryptMut + BlockCipher + AlgorithmName, { fn write_alg_name(f: &mut fmt::Formatter<'_>) -> fmt::Result { f.write_str("cfb::Encryptor<")?; ::write_alg_name(f)?; f.write_str(">") } } impl fmt::Debug for Encryptor where C: BlockEncryptMut + BlockCipher + AlgorithmName, { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { f.write_str("cfb::Encryptor<")?; ::write_alg_name(f)?; f.write_str("> { ... }") } } impl fmt::Debug for BufEncryptor where C: BlockEncryptMut + BlockCipher + AlgorithmName, { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { f.write_str("cfb::BufEncryptor<")?; ::write_alg_name(f)?; f.write_str("> { ... }") } } #[cfg(feature = "zeroize")] #[cfg_attr(docsrs, doc(cfg(feature = "zeroize")))] impl Drop for Encryptor { fn drop(&mut self) { self.iv.zeroize(); } } #[cfg(feature = "zeroize")] #[cfg_attr(docsrs, doc(cfg(feature = "zeroize")))] impl Drop for BufEncryptor { fn drop(&mut self) { self.iv.zeroize(); } } #[cfg(feature = "zeroize")] #[cfg_attr(docsrs, doc(cfg(feature = "zeroize")))] impl ZeroizeOnDrop for Encryptor {} #[cfg(feature = "zeroize")] #[cfg_attr(docsrs, doc(cfg(feature = "zeroize")))] impl ZeroizeOnDrop for BufEncryptor {} struct Closure<'a, BS, BC> where BS: ArrayLength, BC: BlockClosure, { iv: &'a mut GenericArray, f: BC, } impl<'a, BS, BC> BlockSizeUser for Closure<'a, BS, BC> where BS: ArrayLength, BC: BlockClosure, { type BlockSize = BS; } impl<'a, BS, BC> BlockClosure for Closure<'a, BS, BC> where BS: ArrayLength, BC: BlockClosure, { #[inline(always)] fn call>(self, backend: &mut B) { let Self { iv, f } = self; f.call(&mut Backend { iv, backend }); } } struct Backend<'a, BS, BK> where BS: ArrayLength, BK: BlockBackend, { iv: &'a mut GenericArray, backend: &'a mut BK, } impl<'a, BS, BK> BlockSizeUser for Backend<'a, BS, BK> where BS: ArrayLength, BK: BlockBackend, { type BlockSize = BS; } impl<'a, BS, BK> ParBlocksSizeUser for Backend<'a, BS, BK> where BS: ArrayLength, BK: BlockBackend, { type ParBlocksSize = U1; } impl<'a, BS, BK> BlockBackend for Backend<'a, BS, BK> where BS: ArrayLength, BK: BlockBackend, { #[inline(always)] fn proc_block(&mut self, mut block: InOut<'_, '_, Block>) { block.xor_in2out(self.iv); let mut t = block.get_out().clone(); self.backend.proc_block((&mut t).into()); *self.iv = t; } } #[inline(always)] fn xor_set1(buf1: &mut [u8], buf2: &mut [u8]) { for (a, b) in buf1.iter_mut().zip(buf2) { let t = *a ^ *b; *a = t; *b = t; } } cfb-mode-0.8.2/src/lib.rs000064400000000000000000000044421046102023000132160ustar 00000000000000//! [Cipher feedback][1] (CFB) mode with full block feedback. //! //! //! //! //! Mode functionality is accessed using traits from re-exported [`cipher`] crate. //! //! # ⚠️ Security Warning: Hazmat! //! //! This crate does not ensure ciphertexts are authentic! Thus ciphertext integrity //! is not verified, which can lead to serious vulnerabilities! //! //! # Example //! ``` //! use aes::cipher::{AsyncStreamCipher, KeyIvInit}; //! use hex_literal::hex; //! //! type Aes128CfbEnc = cfb_mode::Encryptor; //! type Aes128CfbDec = cfb_mode::Decryptor; //! //! let key = [0x42; 16]; //! let iv = [0x24; 16]; //! let plaintext = *b"hello world! this is my plaintext."; //! let ciphertext = hex!( //! "3357121ebb5a29468bd861467596ce3d6f99e251cc2d9f0a598032ae386d0ab995b3" //! ); //! //! // encrypt/decrypt in-place //! let mut buf = plaintext.to_vec(); //! Aes128CfbEnc::new(&key.into(), &iv.into()).encrypt(&mut buf); //! assert_eq!(buf[..], ciphertext[..]); //! //! Aes128CfbDec::new(&key.into(), &iv.into()).decrypt(&mut buf); //! assert_eq!(buf[..], plaintext[..]); //! //! // encrypt/decrypt from buffer to buffer //! // buffer length must be equal to input length //! let mut buf1 = [0u8; 34]; //! Aes128CfbEnc::new(&key.into(), &iv.into()) //! .encrypt_b2b(&plaintext, &mut buf1) //! .unwrap(); //! assert_eq!(buf1[..], ciphertext[..]); //! //! let mut buf2 = [0u8; 34]; //! Aes128CfbDec::new(&key.into(), &iv.into()) //! .decrypt_b2b(&buf1, &mut buf2) //! .unwrap(); //! assert_eq!(buf2[..], plaintext[..]); //! ``` //! //! [1]: https://en.wikipedia.org/wiki/Block_cipher_mode_of_operation#Cipher_feedback_(CFB) #![no_std] #![doc( html_logo_url = "https://raw.githubusercontent.com/RustCrypto/media/6ee8e381/logo.svg", html_favicon_url = "https://raw.githubusercontent.com/RustCrypto/media/6ee8e381/logo.svg" )] #![forbid(unsafe_code)] #![cfg_attr(docsrs, feature(doc_cfg))] #![warn(missing_docs, rust_2018_idioms)] mod decrypt; mod encrypt; pub use cipher; pub use decrypt::{BufDecryptor, Decryptor}; pub use encrypt::{BufEncryptor, Encryptor}; cfb-mode-0.8.2/tests/aes.rs000064400000000000000000000101621046102023000135670ustar 00000000000000use aes::*; use cfb_mode::{BufDecryptor, BufEncryptor, Decryptor, Encryptor}; use cipher::{block_mode_dec_test, block_mode_enc_test, iv_state_test, KeyInit}; iv_state_test!(aes128_cfb_enc_iv_state, Encryptor, encrypt); iv_state_test!(aes128_cfb_dec_iv_state, Decryptor, decrypt); iv_state_test!(aes192_cfb_enc_iv_state, Encryptor, encrypt); iv_state_test!(aes192_cfb_dec_iv_state, Decryptor, decrypt); iv_state_test!(aes256_cfb_enc_iv_state, Encryptor, encrypt); iv_state_test!(aes256_cfb_dec_iv_state, Decryptor, decrypt); // Test vectors from CVAP "AES Multiblock Message Test (MMT) Sample Vectors": // block_mode_enc_test!(aes128_cfb_enc_test, "aes128", Encryptor); block_mode_dec_test!(aes128_cfb_dec_test, "aes128", Decryptor); block_mode_enc_test!(aes128enc_cfb_enc_test, "aes128", Encryptor); block_mode_dec_test!(aes128enc_cfb_dec_test, "aes128", Decryptor); block_mode_enc_test!(aes192_cfb_enc_test, "aes192", Encryptor); block_mode_dec_test!(aes192_cfb_dec_test, "aes192", Decryptor); block_mode_enc_test!(aes192enc_cfb_enc_test, "aes192", Encryptor); block_mode_dec_test!(aes192dec_cfb_dec_test, "aes192", Decryptor); block_mode_enc_test!(aes256_cfb_enc_test, "aes256", Encryptor); block_mode_dec_test!(aes256_cfb_dec_test, "aes256", Decryptor); block_mode_enc_test!(aes256enc_cfb_enc_test, "aes256", Encryptor); block_mode_dec_test!(aes256dec_cfb_dec_test, "aes256", Decryptor); /// Test methods from the `AsyncStreamCipher` trait. #[test] fn aes128_cfb_async_test() { use cipher::{AsyncStreamCipher, KeyIvInit}; type Enc = Encryptor; type Dec = Decryptor; let key = [42; 16]; let iv = [24; 16]; let mut pt = [0u8; 101]; for (i, b) in pt.iter_mut().enumerate() { *b = (i % 11) as u8; } let enc = Enc::new_from_slices(&key, &iv).unwrap(); let mut ct = pt.clone(); enc.encrypt(&mut ct); for i in 1..100 { let enc = Enc::new_from_slices(&key, &iv).unwrap(); let mut t = pt.clone(); let t = &mut t[..i]; enc.encrypt(t); assert_eq!(t, &ct[..i]); let dec = Dec::new_from_slices(&key, &iv).unwrap(); dec.decrypt(t); assert_eq!(t, &pt[..i]); } } #[test] fn aes128_cfb_buffered_test() { use cipher::{AsyncStreamCipher, KeyIvInit}; type Enc = Encryptor; type BufEnc = BufEncryptor; type BufDec = BufDecryptor; let key = [42; 16]; let iv = [24; 16]; let mut pt = [0u8; 101]; for (i, b) in pt.iter_mut().enumerate() { *b = (i % 11) as u8; } // unbuffered let enc = Enc::new_from_slices(&key, &iv).unwrap(); let mut ct = pt.clone(); enc.encrypt(&mut ct); // buffered for i in 1..100 { let mut buf_enc = BufEnc::new_from_slices(&key, &iv).unwrap(); let mut ct2 = pt.clone(); for chunk in ct2.chunks_mut(i) { buf_enc.encrypt(chunk); } assert_eq!(ct2, ct); let mut buf_dec = BufDec::new_from_slices(&key, &iv).unwrap(); for chunk in ct2.chunks_mut(i) { buf_dec.decrypt(chunk); } assert_eq!(ct2, pt); } // buffered with restore for i in 1..100 { let mut buf_enc = BufEnc::new_from_slices(&key, &iv).unwrap(); let mut ct2 = pt.clone(); for chunk in ct2.chunks_mut(i) { let (iv, pos) = buf_enc.get_state(); let cipher = Aes128::new_from_slice(&key).unwrap(); buf_enc = BufEnc::from_state(cipher, iv, pos); buf_enc.encrypt(chunk); } assert_eq!(ct2, ct); let mut buf_dec = BufDec::new_from_slices(&key, &iv).unwrap(); for chunk in ct2.chunks_mut(i) { let (iv, pos) = buf_dec.get_state(); let cipher = Aes128::new_from_slice(&key).unwrap(); buf_dec = BufDec::from_state(cipher, iv, pos); buf_dec.decrypt(chunk); } assert_eq!(ct2, pt); } } cfb-mode-0.8.2/tests/data/aes128.blb000064400000000000000000000102551046102023000150510ustar 00000000000000 [x G5 X+RKVڒRHd KZ"`)3p9Lj ,϶رՋp pL6Z̹W S7MX`ޖi@rfv%ca'HR]}@ ; 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