@stablelib/ed25519 - npm Package Compare versions

Comparing version 0.10.9 to 0.11.0

ed25519.ts

@@ -851,1 +851,40 @@ // Copyright (C) 2016 Dmitry Chestnykh
 }
+
+/**
+ * Convert Ed25519 public key to X5519 public key.
+ *
+ * Throws if given an invalid public key.
+ */
+export function convertPublicKeyToX25519(publicKey: Uint8Array): Uint8Array {
+    let q = [gf(), gf(), gf(), gf()];
+
+    if (unpackneg(q, publicKey)) {
+        throw new Error("Ed25519: invalid public key");
+    }
+
+    // Formula: montgomeryX = (edwardsY + 1)*inverse(1 - edwardsY) mod p
+    let a = gf();
+    let b = gf();
+    let y = q[1];
+    add(a, gf1, y);
+    sub(b, gf1, y);
+    inv25519(b, b);
+    mul(a, a, b);
+
+    let z = new Uint8Array(32);
+    pack25519(z, a);
+    return z;
+}
+
+/**
+ *  Convert Ed25519 secret (private) key to X25519 secret key.
+ */
+export function convertSecretKeyToX25519(secretKey: Uint8Array): Uint8Array {
+    const d = hash(secretKey.subarray(0, 32));
+    d[0] &= 248;
+    d[31] &= 127;
+    d[31] |= 64;
+    const o = new Uint8Array(d.subarray(0, 32));
+    wipe(d);
+    return o;
+}

lib/ed25519.d.ts

@@ -15,1 +15,11 @@ import { RandomSource } from "@stablelib/random";
 export declare function verify(publicKey: Uint8Array, message: Uint8Array, signature: Uint8Array): boolean;
+/**
+ * Convert Ed25519 public key to X5519 public key.
+ *
+ * Throws if given an invalid public key.
+ */
+export declare function convertPublicKeyToX25519(publicKey: Uint8Array): Uint8Array;
+/**
+ *  Convert Ed25519 secret (private) key to X25519 secret key.
+ */
+export declare function convertSecretKeyToX25519(secretKey: Uint8Array): Uint8Array;

lib/ed25519.js

@@ -808,2 +808,38 @@ "use strict";
 exports.verify = verify;
+/**
+ * Convert Ed25519 public key to X5519 public key.
+ *
+ * Throws if given an invalid public key.
+ */
+function convertPublicKeyToX25519(publicKey) {
+    var q = [gf(), gf(), gf(), gf()];
+    if (unpackneg(q, publicKey)) {
+        throw new Error("Ed25519: invalid public key");
+    }
+    // Formula: montgomeryX = (edwardsY + 1)*inverse(1 - edwardsY) mod p
+    var a = gf();
+    var b = gf();
+    var y = q[1];
+    add(a, gf1, y);
+    sub(b, gf1, y);
+    inv25519(b, b);
+    mul(a, a, b);
+    var z = new Uint8Array(32);
+    pack25519(z, a);
+    return z;
+}
+exports.convertPublicKeyToX25519 = convertPublicKeyToX25519;
+/**
+ *  Convert Ed25519 secret (private) key to X25519 secret key.
+ */
+function convertSecretKeyToX25519(secretKey) {
+    var d = sha512_1.hash(secretKey.subarray(0, 32));
+    d[0] &= 248;
+    d[31] &= 127;
+    d[31] |= 64;
+    var o = new Uint8Array(d.subarray(0, 32));
+    wipe_1.wipe(d);
+    return o;
+}
+exports.convertSecretKeyToX25519 = convertSecretKeyToX25519;
 //# sourceMappingURL=ed25519.js.map

package.json

 {
   "name": "@stablelib/ed25519",
-  "version": "0.10.9",
+  "version": "0.11.0",
   "description": "Ed25519 public-key signature (EdDSA with Curve25519)",
@@ -26,3 +26,3 @@ "main": "./lib/ed25519.js",
   },
-  "gitHead": "cd823c5ca890d18b9abd28aae7af728013e7ef9b"
+  "gitHead": "bfc2e6b7c9c3f31c7bb3610b8a0c09d3ef3613ca"
 }

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Improved metrics

Total package byte prevSize

2002685

increased by0.33%

Lines of code

16583

increased by0.68%

No dependency changes