87 lines
2.4 KiB
Rust
87 lines
2.4 KiB
Rust
//! Counter Mode with a 32-bit big endian counter
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use cipher::{KeyIvInit, StreamCipher, StreamCipherSeek, StreamCipherSeekCore};
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use hex_literal::hex;
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type Aes128Ctr = ctr::Ctr32BE<aes::Aes128>;
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const KEY: &[u8; 16] = &hex!("000102030405060708090A0B0C0D0E0F");
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const NONCE1: &[u8; 16] = &hex!("11111111111111111111111111111111");
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const NONCE2: &[u8; 16] = &hex!("222222222222222222222222FFFFFFFE");
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#[test]
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fn counter_incr() {
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let mut ctr = Aes128Ctr::new(KEY.into(), NONCE1.into());
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assert_eq!(ctr.get_core().get_block_pos(), 0);
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let mut buffer = [0u8; 64];
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ctr.apply_keystream(&mut buffer);
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assert_eq!(ctr.get_core().get_block_pos(), 4);
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assert_eq!(
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&buffer[..],
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&hex!(
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"35D14E6D3E3A279CF01E343E34E7DED36EEADB04F42E2251AB4377F257856DBA"
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"0AB37657B9C2AA09762E518FC9395D5304E96C34CCD2F0A95CDE7321852D90C0"
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)[..]
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);
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}
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#[test]
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fn counter_seek() {
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let mut ctr = Aes128Ctr::new(KEY.into(), NONCE1.into());
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ctr.seek(16);
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assert_eq!(ctr.get_core().get_block_pos(), 1);
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let mut buffer = [0u8; 64];
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ctr.apply_keystream(&mut buffer);
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assert_eq!(ctr.get_core().get_block_pos(), 5);
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assert_eq!(
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&buffer[..],
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&hex!(
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"6EEADB04F42E2251AB4377F257856DBA0AB37657B9C2AA09762E518FC9395D53"
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"04E96C34CCD2F0A95CDE7321852D90C0F7441EAB3811A03FDBD162AEC402F5AA"
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)[..]
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);
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}
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#[test]
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fn keystream_xor() {
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let mut ctr = Aes128Ctr::new(KEY.into(), NONCE1.into());
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let mut buffer = [1u8; 64];
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ctr.apply_keystream(&mut buffer);
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assert_eq!(
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&buffer[..],
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&hex!(
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"34D04F6C3F3B269DF11F353F35E6DFD26FEBDA05F52F2350AA4276F356846CBB"
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"0BB27756B8C3AB08772F508EC8385C5205E86D35CDD3F1A85DDF7220842C91C1"
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)[..]
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);
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}
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#[test]
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fn counter_wrap() {
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let mut ctr = Aes128Ctr::new(KEY.into(), NONCE2.into());
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assert_eq!(ctr.get_core().get_block_pos(), 0);
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let mut buffer = [0u8; 64];
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ctr.apply_keystream(&mut buffer);
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assert_eq!(ctr.get_core().get_block_pos(), 4);
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assert_eq!(
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&buffer[..],
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&hex!(
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"58FC849D1CF53C54C63E1B1D15CB3C8AAA335F72135585E9FF943F4DAC77CB63"
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"BD1AE8716BE69C3B4D886B222B9B4E1E67548EF896A96E2746D8CA6476D8B183"
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)[..]
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);
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}
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cipher::iv_state_test!(
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iv_state,
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ctr::CtrCore<aes::Aes128, ctr::flavors::Ctr32BE>,
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apply_ks,
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);
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