yubihsm 0.35.0

Pure Rust client for YubiHSM2 devices with support for HTTP and USB-based access to the device. Supports most HSM functionality including ECDSA, Ed25519, HMAC, and RSA.
Documentation 
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//! RSA-related algorithms

use super::{oaep, pkcs1, pss};
use crate::algorithm;
use anomaly::fail;

/// RSA algorithms (signing and encryption)
#[derive(Copy, Clone, Debug, Eq, PartialEq)]
#[repr(u8)]
pub enum Algorithm {
    /// RSA encryption with Optimal Asymmetric Encryption Padding (OAEP)
    Oaep(oaep::Algorithm),

    /// RSA PKCS#1v1.5: legacy signature and encryption algorithms
    Pkcs1(pkcs1::Algorithm),

    /// RSASSA-PSS: Probabilistic Signature Scheme
    Pss(pss::Algorithm),
}

impl Algorithm {
    /// Convert an unsigned byte tag into an `Algorithm` (if valid)
    pub fn from_u8(tag: u8) -> Result<Self, algorithm::Error> {
        Ok(match tag {
            0x01..=0x04 => Algorithm::Pkcs1(pkcs1::Algorithm::from_u8(tag)?),
            0x05..=0x08 => Algorithm::Pss(pss::Algorithm::from_u8(tag)?),
            0x19..=0x1c => Algorithm::Oaep(oaep::Algorithm::from_u8(tag)?),
            _ => fail!(
                algorithm::ErrorKind::TagInvalid,
                "unknown RSA algorithm ID: 0x{:02x}",
                tag
            ),
        })
    }

    /// Serialize algorithm ID as a byte
    pub fn to_u8(self) -> u8 {
        match self {
            Algorithm::Oaep(alg) => alg.to_u8(),
            Algorithm::Pkcs1(alg) => alg.to_u8(),
            Algorithm::Pss(alg) => alg.to_u8(),
        }
    }
}

impl_algorithm_serializers!(Algorithm);

impl From<oaep::Algorithm> for Algorithm {
    fn from(alg: oaep::Algorithm) -> Algorithm {
        Algorithm::Oaep(alg)
    }
}

impl From<pkcs1::Algorithm> for Algorithm {
    fn from(alg: pkcs1::Algorithm) -> Algorithm {
        Algorithm::Pkcs1(alg)
    }
}

impl From<pss::Algorithm> for Algorithm {
    fn from(alg: pss::Algorithm) -> Algorithm {
        Algorithm::Pss(alg)
    }
}