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Add io::Write implementation for Hmac #294

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Add io::Write implementation for Hmac #294

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6 changes: 6 additions & 0 deletions src/hmac.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,7 @@
* This module implements the Hmac function - a Message Authentication Code using a Digest.
*/

use std::io;
use std::iter::repeat;

use cryptoutil;
Expand Down Expand Up @@ -117,6 +118,11 @@ impl <D: Digest> Mac for Hmac<D> {
fn output_bytes(&self) -> usize { self.digest.output_bytes() }
}

impl <D: Digest> io::Write for Hmac<D> {
fn write(&mut self, buf: &[u8]) -> io::Result<usize> { self.input(buf); Ok(buf.len()) }
fn flush(&mut self) -> io::Result<()> { Ok(()) }
}

#[cfg(test)]
mod test {
use std::iter::repeat;
Expand Down