crypto::aes

Function cbc_decryptor

Source 
pub fn cbc_decryptor<X: PaddingProcessor + Send + 'static>(
    key_size: KeySize,
    key: &[u8],
    iv: &[u8],
    padding: X,
) -> Box<dyn Decryptor + 'static>
Expand description

Get the best implementation of a CbcDecryptor

Examples found in repository?
examples/symmetriccipher.rs (lines 83-87)
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
fn decrypt(encrypted_data: &[u8], key: &[u8], iv: &[u8]) -> Result<Vec<u8>, symmetriccipher::SymmetricCipherError> {
    let mut decryptor = aes::cbc_decryptor(
            aes::KeySize::KeySize256,
            key,
            iv,
            blockmodes::PkcsPadding);

    let mut final_result = Vec::<u8>::new();
    let mut read_buffer = buffer::RefReadBuffer::new(encrypted_data);
    let mut buffer = [0; 4096];
    let mut write_buffer = buffer::RefWriteBuffer::new(&mut buffer);

    loop {
        let result = try!(decryptor.decrypt(&mut read_buffer, &mut write_buffer, true));
        final_result.extend(write_buffer.take_read_buffer().take_remaining().iter().map(|&i| i));
        match result {
            BufferResult::BufferUnderflow => break,
            BufferResult::BufferOverflow => { }
        }
    }

    Ok(final_result)
}