88 lines
2.2 KiB
Rust
88 lines
2.2 KiB
Rust
use crate::addressing::Address;
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use anyhow::Result;
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use diesel::backend::Backend;
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use diesel::deserialize::FromSql;
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use diesel::sqlite::Sqlite;
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use diesel::{deserialize, sql_types};
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use filebuffer::FileBuffer;
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use multihash::Hasher;
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use serde::{ser, Serialize, Serializer};
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use std::path::{Path};
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use tracing::trace;
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#[derive(Debug, Clone, Eq, PartialEq, FromSqlRow, Hash)]
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pub struct Hash(pub Vec<u8>);
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impl AsRef<[u8]> for Hash {
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fn as_ref(&self) -> &[u8] {
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self.0.as_ref()
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}
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}
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impl FromSql<sql_types::Binary, Sqlite> for Hash {
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fn from_sql(bytes: Option<&<Sqlite as Backend>::RawValue>) -> deserialize::Result<Self> {
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Ok(Hash(Vec::from(not_none!(bytes).read_blob())))
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}
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}
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impl Serialize for Hash {
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fn serialize<S>(&self, serializer: S) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
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where
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S: Serializer,
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{
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serializer.serialize_str(
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b58_encode(
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Address::Hash(self.clone())
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.encode()
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.map_err(ser::Error::custom)?,
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)
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.as_str(),
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)
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}
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}
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pub trait Hashable {
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fn hash(&self) -> Result<Hash>;
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}
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impl Hashable for Path {
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fn hash(self: &Path) -> Result<Hash> {
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trace!("Hashing {:?}...", self);
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let fbuffer = FileBuffer::open(self)?;
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trace!("Finished hashing {:?}...", self);
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Ok(hash(&fbuffer))
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}
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}
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pub fn hash<T: AsRef<[u8]>>(input: T) -> Hash {
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let mut hasher = multihash::Sha2_256::default();
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hasher.update(input.as_ref());
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Hash(Vec::from(hasher.finalize()))
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}
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pub fn b58_encode<T: AsRef<[u8]>>(vec: T) -> String {
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multibase::encode(multibase::Base::Base58Btc, vec.as_ref())
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}
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pub fn b58_decode<T: AsRef<str>>(input: T) -> Result<Vec<u8>> {
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let input = input.as_ref();
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let (_base, data) = multibase::decode(input)?;
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Ok(data)
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}
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#[cfg(test)]
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mod tests {
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use crate::util::hash::{b58_decode, b58_encode};
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#[test]
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fn test_encode_decode() {
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let content = "Hello, World!".as_bytes();
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let encoded = b58_encode(content);
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let decoded = b58_decode(encoded);
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assert!(decoded.is_ok());
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assert_eq!(content, decoded.unwrap());
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}
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}
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