(Tcl) Hash the Contents of a String (SHA256 and other hash algorithms)

Demonstrates how to hash the contents of a string using SHA256, SHA384, SHA512, MD2, MD5, HAVAL, RIPEMD, etc.

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load ./chilkat.dll

# This example requires the Chilkat Crypt API to have been previously unlocked.
# See Unlock Chilkat Crypt for sample code.

set crypt [new_CkCrypt2]

# Choose the hash algorithm.
# Can be  "sha1", "sha256", "sha384", "sha512", "md2", "md5", "haval", "ripemd128", "ripemd160","ripemd256", or "ripemd320".
CkCrypt2_put_HashAlgorithm $crypt "sha256"

# The byte representation of the string matters when hashing. 
# Tell Chilkat that we want to use the utf-8 byte representation.
CkCrypt2_put_Charset $crypt "utf-8"

set hashBytes [new_CkByteData]

set success [CkCrypt2_HashString $crypt "They who can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." $hashBytes]

# Let's examine the hash as a hex string.
set sb [new_CkStringBuilder]

CkStringBuilder_AppendEncoded $sb $hashBytes "hex"
puts "SHA256 hash = [CkStringBuilder_getAsString $sb]"

delete_CkCrypt2 $crypt
delete_CkByteData $hashBytes
delete_CkStringBuilder $sb