git shasum和节点sha1不会产生相同的哈希

Question

$ echo -e 'blob 14\0Hello, World!' | shasum

生产: 8ab686eafeb1f44702738c8b0f24f2567c36da6d

在js/node中运行:

var sha1 = require('sha1');

const fileContents = "Hello, World!";
const length = fileContents.length + 1;

const blobString = `blob ${length}\0${fileContents}`;

const hash = sha1(blobString);

console.log(blobString);
console.log(hash);

生产:

blob 14Hello, World!
d4fcfe4d339d4e59d168fdf3c0ad445fa980a7d6

为什么哈希不平等？(8ab686eafeb1f44702738c8b0f24f2567c36da6d != d4fcfe4d339d4e59d168fdf3c0ad445fa980a7d6)

Answer 1

由于输入中换行符的不同,散列不相等. echo添加换行符.printf改为使用:

printf 'blob 14\0Hello, World!' | shasum
# prints: d4fcfe4d339d4e59d168fdf3c0ad445fa980a7d6

这也可以,但不是可移植的,因为echo在所有系统中都不会支持标记:

echo -ne 'blob 14\0Hello, World!' | shasum