(digest-substring str start end algorithm #!optional result-type)

Returns the digest of the substring, using the specified algorithm

Parameter	Description
str	String to digest
start	Start index
end	End index
algorithm	Algorithm to use: crc32, md5, sha-1, sha-224 or sha-256
result-type	Type of result: hex or u8vector

Example

> (digest-substring "test" 0 2 'md5)  
"569ef72642be0fadd711d6a468d68ee1"
> (digest-substring "test" 0 2 'md5 'u8vector)
#u8(86 158 247 38 66 190 15 173 215 17 214 164 104 214 142 225)