Hash (gb.hash)
This class provides standard hashing functions.
They are based on code provided by 
BusyBox.
This class is static.
Static methods
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Crc32  
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Return the CRC32 hash of the Data string.
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Md5  
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Return the MD5 hash of the Data string.
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Sha1  
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Return the SHA1 hash of the Data string.
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Sha256  
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Return the ShA256 hash of the Data string.
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Sha512  
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Return the SHA512 hash of the Data string.
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