# Module openssl::envelope [−] [src]

Envelope encryption.

# Example

    extern crate openssl;

    use openssl::rsa::Rsa;
    use openssl::envelope::Seal;
    use openssl::pkey::PKey;
    use openssl::symm::Cipher;

    fn main() {
        let rsa = Rsa::generate(2048).unwrap();
        let key = PKey::from_rsa(rsa).unwrap();

        let cipher = Cipher::aes_256_cbc();
        let mut seal = Seal::new(cipher, &[key]).unwrap();

        let secret = b"My secret message";
        let mut encrypted = vec![0; secret.len() + cipher.block_size()];

        let mut enc_len = seal.update(secret, &mut encrypted).unwrap();
        enc_len += seal.finalize(&mut encrypted[enc_len..]).unwrap();
        encrypted.truncate(enc_len);
    }

## Structs

Open | Represents an EVP_Open context.
Seal | Represents an EVP_Seal context.