@iov/crypto - npm Package Compare versions

Comparing version 0.12.1 to 0.12.2

build/secp256k1.js

@@ -94,4 +94,10 @@ "use strict";
     }
+    static recoverPubkey(signature, messageHash) {
+        const signatureForElliptic = { r: encoding_1.Encoding.toHex(signature.r()), s: encoding_1.Encoding.toHex(signature.s()) };
+        const point = secp256k1.recoverPubKey(messageHash, signatureForElliptic, signature.recovery);
+        const keypair = secp256k1.keyFromPublic(point);
+        return encoding_1.Encoding.fromHex(keypair.getPublic(false, "hex"));
+    }
 }
 exports.Secp256k1 = Secp256k1;
 //# sourceMappingURL=secp256k1.js.map

build/secp256k1.spec.js

@@ -335,3 +335,27 @@ "use strict";
     }));
+    describe("recoverPubkey", () => {
+        it("can recover pubkey", () => __awaiter(this, void 0, void 0, function* () {
+            {
+                // Test data from https://github.com/ethereumjs/ethereumjs-util/blob/v6.1.0/test/index.js#L496
+                const expectedPubkey = (yield secp256k1_1.Secp256k1.makeKeypair(fromHex("3c9229289a6125f7fdf1885a77bb12c37a8d3b4962d936f7e3084dece32a3ca1"))).pubkey;
+                const signature = new secp256k1signature_1.ExtendedSecp256k1Signature(fromHex("99e71a99cb2270b8cac5254f9e99b6210c6c10224a1579cf389ef88b20a1abe9"), fromHex("129ff05af364204442bdb53ab6f18a99ab48acc9326fa689f228040429e3ca66"), 0);
+                const messageHash = fromHex("82ff40c0a986c6a5cfad4ddf4c3aa6996f1a7837f9c398e17e5de5cbd5a12b28");
+                const pubkey = secp256k1_1.Secp256k1.recoverPubkey(signature, messageHash);
+                expect(pubkey).toEqual(expectedPubkey);
+            }
+            {
+                // Test data from https://github.com/randombit/botan/blob/2.9.0/src/tests/data/pubkey/ecdsa_key_recovery.vec
+                const expectedPubkeyX = "F3F8BB913AA68589A2C8C607A877AB05252ADBD963E1BE846DDEB8456942AEDC";
+                const expectedPubkeyY = "A2ED51F08CA3EF3DAC0A7504613D54CD539FC1B3CBC92453CD704B6A2D012B2C";
+                const expectedPubkey = fromHex(`04${expectedPubkeyX}${expectedPubkeyY}`);
+                const r = fromHex("E30F2E6A0F705F4FB5F8501BA79C7C0D3FAC847F1AD70B873E9797B17B89B390");
+                const s = fromHex("81F1A4457589F30D76AB9F89E748A68C8A94C30FE0BAC8FB5C0B54EA70BF6D2F");
+                const signature = new secp256k1signature_1.ExtendedSecp256k1Signature(r, s, 0);
+                const messageHash = fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF");
+                const pubkey = secp256k1_1.Secp256k1.recoverPubkey(signature, messageHash);
+                expect(pubkey).toEqual(expectedPubkey);
+            }
+        }));
+    });
 });
 //# sourceMappingURL=secp256k1.spec.js.map

package.json

 {
   "name": "@iov/crypto",
-  "version": "0.12.1",
+  "version": "0.12.2",
   "description": "Cryptography resources for IOV projects",
@@ -47,3 +47,3 @@ "author": "IOV SAS <[e-mail]>",
   },
-  "gitHead": "1d5c5437bf89ab7e9219515488524f2f467f2ca9"
+  "gitHead": "31d50f38de85345fd027f0a0acb4065ee48012cf"
 }

src/secp256k1.spec.ts

@@ -7,3 +7,3 @@ /* tslint:disable:no-bitwise */
 import { Secp256k1 } from "./secp256k1";
-import { Secp256k1Signature } from "./secp256k1signature";
+import { ExtendedSecp256k1Signature, Secp256k1Signature } from "./secp256k1signature";
 import { Sha256 } from "./sha";
@@ -355,2 +355,27 @@
   });
+
+  describe("recoverPubkey", () => {
+    it("can recover pubkey", async () => {
+      {
+        // Test data from https://github.com/ethereumjs/ethereumjs-util/blob/v6.1.0/test/index.js#L496
+        const expectedPubkey = (await Secp256k1.makeKeypair(fromHex("3c9229289a6125f7fdf1885a77bb12c37a8d3b4962d936f7e3084dece32a3ca1"))).pubkey;
+        const signature = new ExtendedSecp256k1Signature(fromHex("99e71a99cb2270b8cac5254f9e99b6210c6c10224a1579cf389ef88b20a1abe9"), fromHex("129ff05af364204442bdb53ab6f18a99ab48acc9326fa689f228040429e3ca66"), 0);
+        const messageHash = fromHex("82ff40c0a986c6a5cfad4ddf4c3aa6996f1a7837f9c398e17e5de5cbd5a12b28");
+        const pubkey = Secp256k1.recoverPubkey(signature, messageHash);
+        expect(pubkey).toEqual(expectedPubkey);
+      }
+      {
+        // Test data from https://github.com/randombit/botan/blob/2.9.0/src/tests/data/pubkey/ecdsa_key_recovery.vec
+        const expectedPubkeyX = "F3F8BB913AA68589A2C8C607A877AB05252ADBD963E1BE846DDEB8456942AEDC";
+        const expectedPubkeyY = "A2ED51F08CA3EF3DAC0A7504613D54CD539FC1B3CBC92453CD704B6A2D012B2C";
+        const expectedPubkey = fromHex(`04${expectedPubkeyX}${expectedPubkeyY}`);
+        const r = fromHex("E30F2E6A0F705F4FB5F8501BA79C7C0D3FAC847F1AD70B873E9797B17B89B390");
+        const s = fromHex("81F1A4457589F30D76AB9F89E748A68C8A94C30FE0BAC8FB5C0B54EA70BF6D2F");
+        const signature = new ExtendedSecp256k1Signature(r, s, 0);
+        const messageHash = fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF");
+        const pubkey = Secp256k1.recoverPubkey(signature, messageHash);
+        expect(pubkey).toEqual(expectedPubkey);
+      }
+    });
+  });
 });

src/secp256k1.ts

@@ -106,2 +106,9 @@ import { Encoding } from "@iov/encoding";
   }
+
+  public static recoverPubkey(signature: ExtendedSecp256k1Signature, messageHash: Uint8Array): Uint8Array {
+    const signatureForElliptic = { r: Encoding.toHex(signature.r()), s: Encoding.toHex(signature.s()) };
+    const point = secp256k1.recoverPubKey(messageHash, signatureForElliptic, signature.recovery);
+    const keypair = secp256k1.keyFromPublic(point);
+    return Encoding.fromHex(keypair.getPublic(false, "hex"));
+  }
 }

types/secp256k1.d.ts

@@ -11,2 +11,3 @@ import { ExtendedSecp256k1Signature, Secp256k1Signature } from "./secp256k1signature";
     static verifySignature(signature: Secp256k1Signature, messageHash: Uint8Array, pubkey: Uint8Array): Promise<boolean>;
+    static recoverPubkey(signature: ExtendedSecp256k1Signature, messageHash: Uint8Array): Uint8Array;
 }

No alert changes

Improved metrics

Total package byte prevSize

1090590

0.56%

Lines of code

7536

0.82%

No dependency changes