policy: fix integrity when DEFAULT_ENCODING is set

PR-URL: #39750
Reviewed-By: Bradley Farias <bradley.meck@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

lib/internal/policy/manifest.js

@@ -501,8 +501,10 @@ class Manifest {
             value: expected
           } = integrityEntries[i];
           const hash = createHash(algorithm);
-          HashUpdate(hash, content);
-          const digest = HashDigest(hash);
+          // TODO(tniessen): the content should not be passed as a string in the
+          // first place, see https://github.com/nodejs/node/issues/39707
+          HashUpdate(hash, content, 'utf8');
+          const digest = HashDigest(hash, 'buffer');
           if (digest.length === expected.length &&
             timingSafeEqual(digest, expected)) {
             return true;

test/fixtures/policy/crypto-default-encoding/.gitattributes

@@ -0,0 +1 @@
+*.js text eol=lf

test/fixtures/policy/crypto-default-encoding/dep.js

@@ -0,0 +1,3 @@
+'use strict';
+
+// No code.

test/fixtures/policy/crypto-default-encoding/parent.js

@@ -0,0 +1,4 @@
+'use strict';
+
+require('crypto').DEFAULT_ENCODING = process.env.DEFAULT_ENCODING;
+require('./dep.js');

test/fixtures/policy/crypto-default-encoding/policy.json

@@ -0,0 +1,14 @@
+{
+  "resources": {
+    "./parent.js": {
+      "integrity": "sha384-j4pMdq83q5Bq9+idcHuGKzi89FrYm1PhZYrEw3irbNob6g4i3vKBjfYiRNYwmoGr",
+      "dependencies": {
+        "crypto": true,
+        "./dep.js": true
+      }
+    },
+    "./dep.js": {
+      "integrity": "sha384-VU7GIrTix/HFLhUb4yqsV4n1xXqjPcWw6kLvjuKXtR1+9nmufJu5vZLajBs8brIW"
+    }
+  }
+}

test/parallel/test-policy-crypto-default-encoding.js

@@ -0,0 +1,34 @@
+'use strict';
+
+const common = require('../common');
+if (!common.hasCrypto)
+  common.skip('missing crypto');
+common.requireNoPackageJSONAbove();
+
+const fixtures = require('../common/fixtures');
+
+const assert = require('assert');
+const { spawnSync } = require('child_process');
+
+const encodings = ['buffer', 'utf8', 'utf16le', 'latin1', 'base64', 'hex'];
+
+for (const encoding of encodings) {
+  const dep = fixtures.path('policy', 'crypto-default-encoding', 'parent.js');
+  const depPolicy = fixtures.path(
+    'policy',
+    'crypto-default-encoding',
+    'policy.json');
+  const { status } = spawnSync(
+    process.execPath,
+    [
+      '--experimental-policy', depPolicy, dep,
+    ],
+    {
+      env: {
+        ...process.env,
+        DEFAULT_ENCODING: encoding
+      }
+    }
+  );
+  assert.strictEqual(status, 0);
+}