Implemented key parsing

ext_federation/src/ap_client.rs

@@ -11,9 +11,10 @@ use url::Url;
 use magnetar_core::web_model::content_type::ContentActivityStreams;
 
 use crate::{
-    ApClientService,
-    ApSignature,
-    ApSigningField, ApSigningHeaders, client::federation_client::{FederationClient, FederationClientError}, crypto::{ApSigningError, ApSigningKey, SigningAlgorithm}, SigningInput, SigningParts,
+    client::federation_client::{FederationClient, FederationClientError},
+    crypto::{ApSigningError, ApSigningKey, SigningAlgorithm},
+    ApClientService, ApSignature, ApSigningField,
+    ApSigningHeaders, SigningInput, SigningParts,
 };
 
 pub struct ApClientServiceDefaultProvider {
@@ -414,9 +415,9 @@ mod test {
 
     use crate::{
         ap_client::ApClientServiceDefaultProvider,
-        ApClientService,
         client::federation_client::FederationClient,
         crypto::{ApHttpPrivateKey, SigningAlgorithm},
+        ApClientService,
     };
 
     #[tokio::test]
@@ -440,7 +441,7 @@ mod test {
 
         let val = ap_client
             .signed_get(
-                ApHttpPrivateKey::Rsa(Box::new(Cow::Owned(rsa_key)))
+                ApHttpPrivateKey::Rsa(Cow::Owned(Box::new(rsa_key)))
                     .create_signing_key(&key_id, SigningAlgorithm::RsaSha256)
                     .into_diagnostic()?,
                 SigningAlgorithm::RsaSha256,

ext_federation/src/crypto.rs

@@ -1,12 +1,16 @@
-use std::{borrow::Cow, fmt::Display};
-
+use rsa::pkcs1::DecodeRsaPrivateKey;
+use rsa::pkcs1::DecodeRsaPublicKey;
+use rsa::pkcs8::DecodePrivateKey;
+use rsa::pkcs8::DecodePublicKey;
 use rsa::signature::Verifier;
 use rsa::{
     sha2::{Sha256, Sha512},
     signature::Signer,
 };
-
 use serde::{Deserialize, Serialize};
+use std::fmt::Formatter;
+use std::str::FromStr;
+use std::{borrow::Cow, fmt::Display};
 use strum::AsRefStr;
 use thiserror::Error;
 
@@ -35,7 +39,7 @@ pub enum SigningAlgorithm {
 }
 
 impl Display for SigningAlgorithm {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
         match self {
             Self::Hs2019 => write!(f, "hs2019"),
             Self::RsaSha256 => write!(f, "rsa-sha256"),
@@ -61,6 +65,59 @@ pub enum ApHttpPublicKey<'a> {
     Ed25519(Cow<'a, ed25519_dalek::VerifyingKey>),
 }
 
+#[derive(Debug, Copy, Clone, Error)]
+pub struct ApHttpPublicKeyParseError;
+
+impl Display for ApHttpPublicKeyParseError {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        write!(
+            f,
+            "Failed to parse the public key: No available parser could decode the PEM string"
+        )
+    }
+}
+
+impl FromStr for ApHttpPublicKey<'_> {
+    type Err = ApHttpPublicKeyParseError;
+
+    fn from_str(input_pem: &str) -> Result<Self, Self::Err> {
+        let pem = input_pem.trim();
+
+        let parse_pkcs1_rsa: &dyn Fn(_) -> _ = &|p| {
+            Some(ApHttpPublicKey::Rsa(Cow::Owned(
+                rsa::RsaPublicKey::from_pkcs1_pem(p).ok()?,
+            )))
+        };
+        let parse_spki_rsa: &dyn Fn(_) -> _ = &|p| {
+            Some(ApHttpPublicKey::Rsa(Cow::Owned(
+                rsa::RsaPublicKey::from_public_key_pem(p).ok()?,
+            )))
+        };
+        let parse_spki_ed25519: &dyn Fn(_) -> _ = &|p| {
+            Some(ApHttpPublicKey::Ed25519(Cow::Owned(
+                ed25519_dalek::VerifyingKey::from_public_key_pem(p).ok()?,
+            )))
+        };
+
+        // Some heuristics
+        let parsers: &[_] = match pem {
+            p if p.starts_with("-----BEGIN PUBLIC KEY-----") => {
+                &[parse_spki_rsa, parse_spki_ed25519]
+            }
+            p if p.starts_with("-----BEGIN RSA PUBLIC KEY-----") => &[parse_pkcs1_rsa],
+            _ => &[parse_spki_rsa, parse_spki_ed25519, parse_pkcs1_rsa],
+        };
+
+        for parser in parsers {
+            if let Some(k) = parser(pem) {
+                return Ok(k);
+            }
+        }
+
+        Err(ApHttpPublicKeyParseError)
+    }
+}
+
 impl ApHttpVerificationKey<'_> {
     pub fn verify(&self, message: &[u8], signature: &[u8]) -> Result<(), ApVerificationError> {
         match self {
@@ -109,12 +166,10 @@ impl ApHttpPublicKey<'_> {
                 ));
                 Ok(verification_key.verify(message, signature)?)
             }
-            (_, SigningAlgorithm::RsaSha256) => {
-                return Err(ApVerificationError::KeyAlgorithmMismatch(
-                    algorithm,
-                    self.as_ref().to_owned(),
-                ));
-            }
+            (_, SigningAlgorithm::RsaSha256) => Err(ApVerificationError::KeyAlgorithmMismatch(
+                algorithm,
+                self.as_ref().to_owned(),
+            )),
             (Self::Ed25519(key), SigningAlgorithm::Hs2019) => {
                 let verification_key = ApHttpVerificationKey::Ed25519(Cow::Borrowed(key.as_ref()));
                 Ok(verification_key.verify(message, signature)?)
@@ -126,17 +181,72 @@ impl ApHttpPublicKey<'_> {
 #[derive(Debug, Clone, AsRefStr)]
 pub enum ApHttpPrivateKey<'a> {
     #[strum(serialize = "rsa")]
-    Rsa(Box<Cow<'a, rsa::RsaPrivateKey>>),
+    Rsa(Cow<'a, Box<rsa::RsaPrivateKey>>),
     #[strum(serialize = "ed25519")]
     Ed25519(Cow<'a, ed25519_dalek::SecretKey>),
 }
 
+#[derive(Debug, Copy, Clone, Error)]
+pub struct ApHttpPrivateKeyParseError;
+
+impl Display for ApHttpPrivateKeyParseError {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        write!(
+            f,
+            "Failed to parse the private key: No available parser could decode the PEM string"
+        )
+    }
+}
+
+impl FromStr for ApHttpPrivateKey<'_> {
+    type Err = ApHttpPrivateKeyParseError;
+
+    fn from_str(input_pem: &str) -> Result<Self, Self::Err> {
+        let pem = input_pem.trim();
+
+        let parse_pkcs1_rsa: &dyn Fn(_) -> _ = &|p| {
+            Some(ApHttpPrivateKey::Rsa(Cow::Owned(Box::new(
+                rsa::RsaPrivateKey::from_pkcs1_pem(p).ok()?,
+            ))))
+        };
+        let parse_pkcs8_rsa: &dyn Fn(_) -> _ = &|p| {
+            Some(ApHttpPrivateKey::Rsa(Cow::Owned(Box::new(
+                rsa::RsaPrivateKey::from_pkcs8_pem(p).ok()?,
+            ))))
+        };
+        let parse_pkcs8_ed25519: &dyn Fn(_) -> _ = &|p| {
+            Some(ApHttpPrivateKey::Ed25519(Cow::Owned(
+                ed25519_dalek::SigningKey::from_pkcs8_pem(p)
+                    .ok()?
+                    .to_bytes(),
+            )))
+        };
+
+        // Some heuristics
+        let parsers: &[_] = match pem {
+            p if p.contains("-----BEGIN PRIVATE KEY-----") => {
+                &[parse_pkcs8_rsa, parse_pkcs8_ed25519]
+            }
+            p if p.contains("-----BEGIN RSA PRIVATE KEY-----") => &[parse_pkcs1_rsa],
+            _ => &[parse_pkcs8_rsa, parse_pkcs8_ed25519, parse_pkcs1_rsa],
+        };
+
+        for parser in parsers {
+            if let Some(k) = parser(pem) {
+                return Ok(k);
+            }
+        }
+
+        Err(ApHttpPrivateKeyParseError)
+    }
+}
+
 #[derive(Debug, Clone, AsRefStr)]
 pub enum ApHttpSigningKey<'a> {
     #[strum(serialize = "rsa-sha256")]
-    RsaSha256(Cow<'a, rsa::pkcs1v15::SigningKey<rsa::sha2::Sha256>>),
+    RsaSha256(Cow<'a, rsa::pkcs1v15::SigningKey<Sha256>>),
     #[strum(serialize = "rsa-sha512")]
-    RsaSha512(Cow<'a, rsa::pkcs1v15::SigningKey<rsa::sha2::Sha512>>),
+    RsaSha512(Cow<'a, rsa::pkcs1v15::SigningKey<Sha512>>),
     #[strum(serialize = "ed25519")]
     Ed25519(Cow<'a, ed25519_dalek::SigningKey>),
 }
@@ -192,7 +302,7 @@ impl ApHttpPrivateKey<'_> {
             key: match (self, algorithm) {
                 (Self::Rsa(key), SigningAlgorithm::RsaSha256 | SigningAlgorithm::Hs2019) => {
                     ApHttpSigningKey::RsaSha256(Cow::Owned(rsa::pkcs1v15::SigningKey::new(
-                        key.clone().into_owned(),
+                        *key.as_ref().to_owned(),
                     )))
                 }
                 (Self::Ed25519(key), SigningAlgorithm::Hs2019) => ApHttpSigningKey::Ed25519(