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global sha2

Hashes conform sha2

This library is a side effect of the pdfe library that needs such helpers. The sha2.digest256, sha2.digest384 and sha2.digest512 functions accept a string and return a string with the hash.

https://github.com/contextgarden/pplib https://gitlab.lisn.upsaclay.fr/texlive/luatex/-/blob/f52b099f3e01d53dc03b315e1909245c3d5418d3/source/libs/pplib/pplib-src/src/util/utilsha.c

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methods

sha2.digest256

function sha2.digest256(data: string) ->  string

@return - binary string

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Example:

local function to_hex(str)
  return (str:gsub('.', function (c)
      return string.format('%02x', string.byte(c))
  end))
end

print(to_hex(sha2.digest256('test')))
 -- 9f86d081... (length 64)

Reference:

sha2.digest384

function sha2.digest384(data: string) ->  string

@return - binary string

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Example:

local function to_hex(str)
  return (str:gsub('.', function (c)
      return string.format('%02x', string.byte(c))
  end))
end

print(to_hex(sha2.digest384('test')))
 -- 76841232... (length 96)

Reference:

sha2.digest512

function sha2.digest512(data: string) ->  string

@return - binary string

😱 Types incomplete or incorrect? 🙏 Please contribute!

Example:

local function to_hex(str)
  return (str:gsub('.', function (c)
      return string.format('%02x', string.byte(c))
  end))
end

print(to_hex(sha2.digest512('test')))
 -- ee26b0dd ... (length 128)

Reference: