From: Chris Duncan <chris@zoso.dev>
Date: Sun, 16 Aug 2026 10:08:30 +0000 (-0700)
Subject: Fix offset buffer tests to correctly target offsets including 0.
X-Git-Url: https://git.codecow.com/?a=commitdiff_plain;h=4932b4d4454bc9480e5b8e3b2b423ff10735641b;p=nano25519.git

Fix offset buffer tests to correctly target offsets including 0.
---

diff --git a/test/node.mjs b/test/node.mjs
index 112fbd2..4858ed9 100644
--- a/test/node.mjs
+++ b/test/node.mjs
@@ -17,7 +17,7 @@ function check (name, test) {
 	console.log(`${test ? '\x1b[32mPASS' : '\x1b[31mFAIL'}\x1b[0m: ${name}`)
 }
 
-const bigBuf = new Uint8Array(96).fill(255)
+const bigBuf = new Uint8Array(128).fill(255)
 let inbuf, outbuf, result, test, passes = 0, failures = 0
 
 // Check string input validation
@@ -353,7 +353,8 @@ inbuf.set(NANO_ORG_VECTOR.privateKeyBytes)
 outbuf = new Uint8Array(bigBuf.buffer.slice(), 0, 32)
 derive(inbuf, outbuf)
 test &&= [...outbuf].map(b => b.toString(16).padStart(2, '0')).join('').toLowerCase() === NANO_ORG_VECTOR.publicKey.toLowerCase()
-test &&= [...new Uint8Array(outbuf.buffer)].map(b => b.toString(16).padStart(2, '0')).join('').toLowerCase() !== NANO_ORG_VECTOR.publicKey.toLowerCase()
+test &&= [...new Uint8Array(outbuf.buffer, 0, 32)].map(b => b.toString(16).padStart(2, '0')).join('').toLowerCase() === NANO_ORG_VECTOR.publicKey.toLowerCase()
+test &&= [...new Uint8Array(outbuf.buffer, 32, 32)].map(b => b.toString(16).padStart(2, '0')).join('').toLowerCase() !== NANO_ORG_VECTOR.publicKey.toLowerCase()
 check(`derive from private key bytes ${NANO_ORG_VECTOR.privateKey} and allocate result to output buffer`, test)
 passes += +test
 failures += +!test
@@ -363,24 +364,29 @@ inbuf.set(NANO_ORG_VECTOR.secretKeyBytes)
 outbuf = new Uint8Array(bigBuf.buffer.slice(), 0, 64)
 sign(NANO_ORG_VECTOR.blockHashBytes, inbuf, outbuf)
 test &&= [...outbuf].map(b => b.toString(16).padStart(2, '0')).join('').toLowerCase() === NANO_ORG_VECTOR.signature.toLowerCase()
-test &&= [...new Uint8Array(outbuf.buffer)].map(b => b.toString(16).padStart(2, '0')).join('').toLowerCase() !== NANO_ORG_VECTOR.publicKey.toLowerCase()
+test &&= [...new Uint8Array(outbuf.buffer, 0, 64)].map(b => b.toString(16).padStart(2, '0')).join('').toLowerCase() === NANO_ORG_VECTOR.signature.toLowerCase()
+test &&= [...new Uint8Array(outbuf.buffer, 64, 64)].map(b => b.toString(16).padStart(2, '0')).join('').toLowerCase() !== NANO_ORG_VECTOR.signature.toLowerCase()
 check(`sign message bytes ${NANO_ORG_VECTOR.blockHash} and allocate result to output buffer`, test)
 passes += +test
 failures += +!test
 
 // Check sync imports with byte inputs and offset output buffer
-outbuf = new Uint8Array(new ArrayBuffer(96), 1, 32)
+outbuf = new Uint8Array(new ArrayBuffer(128), 32, 32)
 derive(NANO_ORG_VECTOR.privateKeyBytes, outbuf)
 test &&= [...outbuf].map(b => b.toString(16).padStart(2, '0')).join('').toLowerCase() === NANO_ORG_VECTOR.publicKey.toLowerCase()
 test &&= [...new Uint8Array(outbuf.buffer)].map(b => b.toString(16).padStart(2, '0')).join('').toLowerCase() !== NANO_ORG_VECTOR.publicKey.toLowerCase()
+test &&= [...new Uint8Array(outbuf.buffer, 0, 32)].map(b => b.toString(16).padStart(2, '0')).join('').toLowerCase() !== NANO_ORG_VECTOR.publicKey.toLowerCase()
+test &&= [...new Uint8Array(outbuf.buffer, 32, 32)].map(b => b.toString(16).padStart(2, '0')).join('').toLowerCase() === NANO_ORG_VECTOR.publicKey.toLowerCase()
 check(`derive from private key bytes ${NANO_ORG_VECTOR.privateKey} to offset outbuf`, test)
 passes += +test
 failures += +!test
 
-outbuf = new Uint8Array(new ArrayBuffer(96), 1, 64)
+outbuf = new Uint8Array(new ArrayBuffer(128), 64, 64)
 sign(NANO_ORG_VECTOR.blockHashBytes, NANO_ORG_VECTOR.secretKeyBytes, outbuf)
 test &&= [...outbuf].map(b => b.toString(16).padStart(2, '0')).join('').toLowerCase() === NANO_ORG_VECTOR.signature.toLowerCase()
-test &&= [...new Uint8Array(outbuf.buffer)].map(b => b.toString(16).padStart(2, '0')).join('').toLowerCase() !== NANO_ORG_VECTOR.publicKey.toLowerCase()
+test &&= [...new Uint8Array(outbuf.buffer)].map(b => b.toString(16).padStart(2, '0')).join('').toLowerCase() !== NANO_ORG_VECTOR.signature.toLowerCase()
+test &&= [...new Uint8Array(outbuf.buffer, 0, 64)].map(b => b.toString(16).padStart(2, '0')).join('').toLowerCase() !== NANO_ORG_VECTOR.signature.toLowerCase()
+test &&= [...new Uint8Array(outbuf.buffer, 64, 64)].map(b => b.toString(16).padStart(2, '0')).join('').toLowerCase() === NANO_ORG_VECTOR.signature.toLowerCase()
 check(`sign message bytes ${NANO_ORG_VECTOR.blockHash} to offset outbuf`, test)
 passes += +test
 failures += +!test