feat: v1.11.15, add convert-jwk-to-pem

src/rsautil.rs

@@ -1,8 +1,14 @@
+use std::collections::HashMap;
 use openssl::bn::{BigNum, BigNumContext};
 use openssl::pkey::PKey;
 use openssl::rsa::{Padding, Rsa};
+use rsa::RsaPublicKey;
 use rust_util::{util_msg, XResult};
 use rust_util::util_msg::MessageType;
+use spki::DecodePublicKey;
+use rsa::pkcs1::DecodeRsaPublicKey;
+use rsa::traits::PublicKeyParts;
+use crate::util::{base64_decode, base64_encode};
 
 #[derive(Debug)]
 pub struct RsaCrt {
@@ -151,3 +157,40 @@ fn pkcs1_padding_for_sign(bs: &[u8], bit_len: usize) -> XResult<Vec<u8>> {
     output.extend_from_slice(bs);
     Ok(output)
 }
+
+pub fn convert_rsa_to_jwk(public_key: &str) -> XResult<String> {
+    let rsa_public_key = try_parse_rsa(public_key)?;
+
+    let e_bytes = rsa_public_key.e().to_bytes_be();
+    let n_bytes = rsa_public_key.n().to_bytes_be();
+
+    let mut jwk = HashMap::new();
+    jwk.insert("kty", "RSA".to_string());
+    jwk.insert("n", base64_encode(&n_bytes));
+    jwk.insert("e", base64_encode(&e_bytes));
+
+    Ok(serde_json::to_string(&jwk).unwrap())
+}
+
+fn try_parse_rsa(public_key: &str) -> XResult<RsaPublicKey> {
+    debugging!("Try parse RSA public key PEM.");
+    // parse RSA public key PEM not works? why?
+    if let Ok(rsa_public_key) = RsaPublicKey::from_public_key_pem(public_key) {
+        return Ok(rsa_public_key);
+    }
+    debugging!("Try parse RSA PKCS#1 public key PEM.");
+    if let Ok(rsa_public_key) = RsaPublicKey::from_pkcs1_pem(public_key) {
+        return Ok(rsa_public_key);
+    }
+    if let Ok(public_key_der) = base64_decode(public_key) {
+        debugging!("Try parse RSA public key DER.");
+        if let Ok(rsa_public_key) = RsaPublicKey::from_public_key_der(&public_key_der) {
+            return Ok(rsa_public_key);
+        }
+        debugging!("Try parse RSA PKCS#1 public key DER.");
+        if let Ok(rsa_public_key) = RsaPublicKey::from_pkcs1_der(&public_key_der) {
+            return Ok(rsa_public_key);
+        }
+    }
+    simple_error!("Invalid RSA public key.")
+}