37 lines
873 B
Rust
37 lines
873 B
Rust
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extern crate blake2_rfc;
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use self::blake2_rfc::blake2s::blake2s;
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/**
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* Extends data length to a power of 2 by minimally right-zero-padding
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*/
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fn extend_to_power_of_2(data: &mut Vec<u8>) {
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let len = data.len();
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let new_len = len.next_power_of_two();
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if new_len > len {
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data.append(&mut vec![0; new_len - len]);
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}
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}
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fn hash(data: Vec<u8>) -> Vec<u8> {
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let result = blake2s(32, &[], data.as_slice());
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result.as_bytes().to_vec()
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}
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// fn list_to_glob() {}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_extend_to_power_of_2() {
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let mut data = vec![1, 2, 3, 4, 5];
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// an array length of 5 should be extended to
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// a length of 8 (the next power of 2) by right
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// padding it with 3 zeros
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extend_to_power_of_2(&mut data);
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assert_eq!(data, [1, 2, 3, 4, 5, 0, 0, 0]);
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}
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}
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