How long is the SHA256 hash

Question

I m going to run SHA256 on a password   salt  but I don t know how long to make my VARCHAR when setting up the MySQL database  What is a good length

User · Answer

It will be fixed 64 chars  so use char 64

User · Answer

Why would you make it VARCHAR  It doesn t vary  It s always 64 characters  which can be determined by running anything into one of the online SHA-256 calculators

User · Answer

A sha256 is 256 bits long -- as its name indicates   Since sha256 returns a hexadecimal representation  4 bits are enough to encode each character  instead of 8  like for ASCII   so 256 bits would represent 64 hex characters  therefore you need a varchar 64   or even a char 64   as the length is always the same  not varying at all   And the demo     hash   hash  sha256    hello  world     var dump  hash     Will give you      php temp php string 64   68e656b251e67e8358bef8483ab0d51c6619f3e7a1a9f0e75838d41ff368f728    i e  a string with 64 characters

User · Answer

Encoding options for SHA256 s 256 bits    Base64  6 bits per char   CHAR 44  including padding character Hex  4 bits per char   CHAR 64  Binary  8 bits per byte   BINARY 32

User · Answer

I prefer to use BINARY 32  since it s the optimized way   You can place in that 32 hex digits from  00 to FF    Therefore BINARY 32

[mysql] How long is the SHA256 hash?

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