Inconsistent Buffer SHA1 in Node.js

[andraaspar]

I have a foo.txt like this:

foo
bar
baz

(LF. No LF at the end.)

And I have the following script:

const { sha1 } = require("crypto-hash");
const fs = require("fs");
const path = require("path");
const crypto = require("crypto");

main();

async function main() {
  const filePath = "foo.txt";
  const buf = fs.readFileSync(filePath);
  const str = fs.readFileSync(filePath, {
    encoding: "utf8",
  });
  console.log(await sha1(buf));
  console.log(await sha1(str));
  console.log(
    await new Promise((resolve, reject) => {
      const hash = crypto.createHash("sha1");
      const input = fs.createReadStream(filePath);
      input.on("readable", () => {
        const data = input.read();
        if (data) {
          hash.update(data);
        } else {
          resolve(hash.digest("hex"));
        }
      });
    })
  );
}

When I run it 3 times I get:

PS C:\Temp> node .\hashtest.js
4c37dbe6f4897fbed62502239273902421e1ea6a
01e06a68df2f0598042449c4088842bb4e92ca75
01e06a68df2f0598042449c4088842bb4e92ca75
PS C:\Temp> node .\hashtest.js
678082bb5b423c3dec7eb593465bd2d2cfa54287
01e06a68df2f0598042449c4088842bb4e92ca75
01e06a68df2f0598042449c4088842bb4e92ca75
PS C:\Temp> node .\hashtest.js
35d9940f295a0205252456e8c808eb5f651711b1
01e06a68df2f0598042449c4088842bb4e92ca75
01e06a68df2f0598042449c4088842bb4e92ca75

The output of sha1(buf) seems to constantly change, and never match the expected result.

[andraaspar]

Node: 12.14.1
crypto-hash: 1.2.2

[andraaspar]

Also, this:

  console.log(
    await new Promise((resolve, reject) => {
      const hash = crypto.createHash("sha1");
      hash.update(buf);
      resolve(hash.digest("hex"));
    })
  );

Produces the correct result (like the latter two).