INNER CODE UNIT · Rust

decrypt

matrix-org/vodozemac · src/cipher/mod.rs:202

    pub fn decrypt(&self, ciphertext: &[u8]) -> Result<Vec<u8>, UnpadError> {
        let cipher = Aes256CbcDec::new(self.keys.aes_key(), self.keys.iv());
        cipher.decrypt_padded_vec::<Pkcs7>(ciphertext)
    }

    /// Verifies that the provided message authentication code (MAC) correctly
    /// authenticates the given message.
    ///
    /// **Warning**: This is a low-level function and must be called before
    /// invoking the [`Cipher::decrypt()`] method.
    #[cfg(all(not(fuzzing), feature = "experimental-session-config"))]
    #[allow(unreachable_pub)]
    pub fn verify_mac(&self, message: &[u8], tag: &Mac) -> Result<(), MacError> {
        let mut hmac = self.get_hmac();

        hmac.update(message);
        hmac.verify_slice(tag.as_bytes())
    }

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