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#
# crypting: Hashes and Crypto in GAP
#
# Declarations
#
#! @Chapter CryptinG Functions
#
#! @Section Internal Types and Functions
#
#!
DeclareCategory("IsSHA256State", IsObject);
# DeclareGlobalVariable("CRYPTING_SHA256_State_Family");
# DeclareGlobalVariable("CRYPTING_SHA256_State_Type", "State of SHA256");
#! @Description
#! Call <Ref Label="HexStringInt" BookName="ref"/> on the argument <A>int</A>
#! then pad the string on the left to <A>length</A> using padding
#! letter <A>pad</A>
#! @Arguments int, pad, length
DeclareGlobalFunction("CRYPTING_HexStringIntPad");
#! @Description
#! Call <Ref Label="HexStringInt" BookName="ref"/> on the argument <A>int</A>
#! then pad the string on the left to length 8 using padding
#! letter 0.
#! @Arguments int
DeclareGlobalFunction("CRYPTING_HexStringIntPad8");
#
#! @Section Hash functions
#
#! @Description
#! Compute the SHA256 hash of the argument <A>string</A>
#! in <C>IsStringRep</C>
#! @Arguments string
DeclareGlobalFunction("SHA256String");
#
#! @Section HMAC
#
# In principle HMAC should work with any hash if done right. Should
# probably look into doing that.
#
#! @Description
#! Compute the HMAC SHA256 given a <A>key</A> and
#! a <A>string</A> in <C>IsStringRep</C>.
#! @Arguments key, string
DeclareGlobalFunction("HMACSHA256");
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