Function rsa_der::public_key_from_der

pub fn public_key_from_der(der: &[u8]) -> Result<(Vec<u8>, Vec<u8>)>

Decodes a DER-encoded public key into the raw n and e components.

The returned tuple is in the form (n, e), where n and e are both big-endian big integers representing the key modulus and exponent, respectively.

Examples

Parsing DER bytes into a public RSA key usable with the rsa crate:

use rsa::RSAPublicKey;
use num_bigint_dig::BigUint;

let bytes: &[u8] = get_der_bytes();

let (n, e) = rsa_der::public_key_from_der(bytes)?;

let key = RSAPublicKey::new(BigUint::from_bytes_be(&n), BigUint::from_bytes_be(&e));