keyplace 0.1.1

Keyplace - server assisted key derivation for humans
Documentation 
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use serde::{Deserialize, Serialize};

/// All of the structs in this module are safe to share with a trusted custodian
/// IE: The server. Note that we don't fully trust the custodian, and we take steps
/// to ensure that the custodian never directly holds any secrets

#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub struct UserAuthKey {
    #[serde(
        serialize_with = "crate::util::as_base64",
        deserialize_with = "crate::util::from_base64_32"
    )]
    pub(crate) auth: [u8; 32],
}

#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub struct CustodialAgentKey {
    #[serde(
        serialize_with = "crate::util::as_base64",
        deserialize_with = "crate::util::from_base64_32"
    )]
    pub(crate) pubkey: [u8; 32],
    pub(crate) mask: KeyMask,
    #[serde(
        serialize_with = "crate::util::as_base64",
        deserialize_with = "crate::util::from_base64_32"
    )]
    pub(crate) check: [u8; 32],
    pub(crate) email: Option<String>,
}

/// KeyMask is a private key which has been XORed with a passkey
/// Such that a private key may be recoverable with the assistance of the custodian
/// but without disclosure of the actual private key
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub struct KeyMask {
    #[serde(
        serialize_with = "crate::util::as_base64",
        deserialize_with = "crate::util::from_base64_32"
    )]
    pub(crate) mask: [u8; 32],
}

impl KeyMask {
    pub fn base64(&self) -> String {
        base64::encode(self.mask)
    }
    pub fn as_bytes(&self) -> &[u8; 32] {
        &self.mask
    }
}