Bash sha256与erlang one不匹配[重复]

pgky5nke 于 2022-12-08 发布在 Erlang

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This question already has answers here:

Generating a SHA-256 hash from the Linux command line (8 answers)
Closed last year.
Erlang returns me a different result than the bash command when I "sha256".

echo a | sha256sum, returns: 87428fc522803d31065e7bce3cf03fe475096631e5e07bbd7a0fde60c4cf25c7  -

Erlang

Bin = crypto:hash(sha256, "a").

<<202,151,129,18,202,27,189,202,250,194,49,179,154,35,220,
      77,167,134,239,248,20,124,78,114,185,128,119,133,175,
      238,72,187>>

I tried different bin to hex from bin to hex None of them gave the result I was expecting.
I got this as a result:

bin_to_hex:bin_to_hex(Bin).
<<"CA978112CA1BBDCAFAC231B39A23DC4DA786EFF8147C4E72B9807785AFEE48BB">>

erlang

来源：https://stackoverflow.com/questions/69272983/bash-sha256-not-matching-erlang-one

1条答案

按热度按时间

ecr0jaav1#

你的echo a将包含一个换行符，当我在erlang版本中添加一个换行符时，我会得到预期的哈希值：

1> Bin = crypto:hash(sha256, "a\n").
<<135,66,143,197,34,128,61,49,6,94,123,206,60,240,63,228,
  117,9,102,49,229,224,123,189,122,15,222,96,196,...>>
2> binary:encode_hex(Bin).
<<"87428FC522803D31065E7BCE3CF03FE475096631E5E07BBD7A0FDE60C4CF25C7">>

您也可以告诉echo不要在-n中使用换行符：

$ echo -n a | sha256sum
ca978112ca1bbdcafac231b39a23dc4da786eff8147c4e72b9807785afee48bb  -

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Bash sha256与erlang one不匹配[重复]

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