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95 lines
2.8 KiB
95 lines
2.8 KiB
#![feature(array_map)]
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use packed_simd::u8x32;
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extern crate trustpilot_challenge_rust;
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use trustpilot_challenge_rust::hash_computer;
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fn parse_hash(hash: u128) -> u32 {
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((hash >> 96) as u32).to_be()
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}
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static MESSAGES: [&str; 8] = [
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"DAPUpOGHw620yalJA0vjFPK7ThgHyAN",
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"4xRslaTeBCNyRu2EiIDueEx3BTbIP5H",
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"kFPd2zk60eEFpNwgEOZAcyDcxRVv0Y8",
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"bm6VQr6w9plie0G8XoOb4wChJXB0vCm",
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"gbFrtHcqOTkeG1QxT8YEMSio1ahAYNq",
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"T0GmOLB2WH04oIrhB3JCyPHFxI8UOow",
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"TWUCy0B0JG5KjQvsu4YUFC5IR5ByS2W",
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"VXqOIzYdLIqx6tw8LJbR7SqR5iYgTlQ"
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];
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static EXPECTED_HASHES: [u128; 8] = [
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0xC6F9E9B203CEA81A7BA28BE276B96A6F,
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0x45BF15D8B08E1AEADE1305B8E43B8F2C,
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0x7AA53B4627C8DD3714F2874EDE04DA7D,
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0x93B650B474B6FDE6B902A76B1DDA10BB,
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0xBBF89511DAC63A516ADDB9BEC79241A5,
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0x7E53E601351A47500BF4A2B7EAD077C3,
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0xFC6FEB2CC3191198E87ECB9D7626580A,
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0xCED45BA82BD1BDCF546255CB6A530FE3,
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];
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// just some random u128 numbers
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static WRONG_HASHES: [u128; 8] = [
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0xF6999358632CA7EBC3E687329B5B330E,
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0x2DFA25CE0B6E11E794A4BAE87EECBBE4,
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0x24436F08BD36CD5E010C4469D6612462,
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0x78A35F791CA6C57396C1C4CB6A773848,
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0xB6906785D8BD81BAF1AA1E2A9F1D17E9,
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0x7841A7132C2784CE7FAC83AD01A43B45,
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0x10D0C197833BE4365F9D5C8262005C77,
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0x654CB866EE50773F999CD32C123E6C12,
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];
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static MIXED_HASHES: [u128; 4] = [
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WRONG_HASHES[0],
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EXPECTED_HASHES[3],
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WRONG_HASHES[1],
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EXPECTED_HASHES[6],
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];
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fn prepare_message(message_string: &str) -> u8x32 {
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let mut bytes_static: [u8; 32] = [0; 32];
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let bytes = message_string.as_bytes();
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for i in 0..bytes.len() {
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bytes_static[i] = bytes[i];
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}
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bytes_static[bytes.len()] = b' ';
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u8x32::from(bytes_static)
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}
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fn prepare_messages(message_strings: [&str; 8]) -> [u8x32; 8] {
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let mut result: [u8x32; 8] = [u8x32::splat(0); 8];
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for i in 0..8 {
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result[i] = prepare_message(message_strings[i]);
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}
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result
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}
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#[test]
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fn it_computes_hashes() {
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let messages_simd = prepare_messages(MESSAGES);
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let hashes = hash_computer::compute_hashes(&messages_simd, MESSAGES[0].len());
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assert_eq!(EXPECTED_HASHES.map(parse_hash), hashes);
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}
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#[test]
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fn it_verifies_hashes() {
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let messages_simd = prepare_messages(MESSAGES);
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let results = hash_computer::find_hashes(&messages_simd, MESSAGES[0].len(), &(EXPECTED_HASHES.map(parse_hash)));
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assert!(results.is_some());
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assert_eq!(results.unwrap(), messages_simd);
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let results = hash_computer::find_hashes(&messages_simd, MESSAGES[0].len(), &(WRONG_HASHES.map(parse_hash)));
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assert!(results.is_none());
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let results = hash_computer::find_hashes(&messages_simd, MESSAGES[0].len(), &(MIXED_HASHES.map(parse_hash)));
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assert!(results.is_some());
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assert_eq!(results.unwrap(), [messages_simd[3], messages_simd[6]]);
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}
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