method : one of "md4", "md5", or "sha1". This specifies the hashing algorithm to use. The default value is "md5".

output : one of string or integer This specifies whether the output should be a string with a hexadecimal representation of the hashed value, or an integer. The default value is string.

The procedure Hash computes a hash, or message digest of the string s. By default, it uses the MD5 message digest algorithm. However, by using the method= option, you can select a different hashing algorithm. The available methods are: "md5", "md4" and "sha1".

This hashed value is represented by a string that is a hexadecimal representation of the integer value of the hash.

The input can be a Maple string or a ByteArray. Using a ByteArray is necessary if the desired input contains bytes that are zero: a string cannot contain such bytes.

It is extremely unlikely that two distinct strings, of arbitrary length, will produce the same hashed value.

All of the StringTools package commands treat strings as (null-terminated) sequences of $8$-bit (ASCII) characters.  Thus, there is no support for multibyte character encodings, such as unicode encodings.

$\mathrm{with}\left(\mathrm{StringTools}\right)\:$

$\mathrm{Hash}\left(''''\right)$

$''d41d8cd98f00b204e9800998ecf8427e''$

$\mathrm{Hash}\left(''abcde''\right)$

$''ab56b4d92b40713acc5af89985d4b786''$

$\mathrm{Hash}\left(''xxxx''\right)$

$''ea416ed0759d46a8de58f63a59077499''$

$\mathrm{Hash}\left(''xxxxx''\right)$

$''fb0e22c79ac75679e9881e6ba183b354''$

$a≔\mathrm{Array}\left(\left[1\,0\,4\right]\,'\mathrm{datatype}=\mathrm{integer}\left[1\right]'\right)$

$a≔\left[\begin{array}{ccc}1& 0& 4\end{array}\right]$

$\mathrm{Hash}\left(a\right)$

$''2fd5cec7a3d4210b1676d83b998d6533''$

$\mathrm{Hash}\left(''abc''\,'\mathrm{method}'=''sha1''\right)$

$''a9993e364706816aba3e25717850c26c9cd0d89d''$

$\mathrm{Hash}\left(''abc''\,'\mathrm{method}'=''md4''\right)$

$''a448017aaf21d8525fc10ae87aa6729d''$

$\mathrm{Hash}\left(''abc''\,'\mathrm{method}'=''md4''\,'\mathrm{output}'='\mathrm{integer}'\right)$

$218367266684986933958873955756159693469$

The StringTools[Hash] command was updated in Maple 2019.