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emn178 / online-tools

Online tools provides md2, md5, sha1, sha2, sha512, bas64, html encode / decode functions
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support double-SHA256 #6

Closed ppKrauss closed 1 year ago

ppKrauss commented 4 years ago

The SHA256d is the standard hash for Bitcoin (see also its common standards) and for the Brazilian registry offices (see e.g. Uniproof).

In Javascript will be something as 

hash = hashlib.sha256(hashlib.sha256(document_bin).digest()).digest()

I can help to implement if necessary... But is very simple for a tool that has already implemented SHA256.

emn178 commented 1 year ago

added this page https://emn178.github.io/online-tools/double_sha256.html