Provided by: ocaml-man_4.08.1-8_all 
NAME
Digest - MD5 message digest.
Module
Module Digest
Documentation
Module Digest
: sig end
MD5 message digest.
This module provides functions to compute 128-bit 'digests' of arbitrary-length strings or files. The
digests are of cryptographic quality: it is very hard, given a digest, to forge a string having that
digest. The algorithm used is MD5. This module should not be used for secure and sensitive cryptographic
applications. For these kind of applications more recent and stronger cryptographic primitives should be
used instead.
type t = string
The type of digests: 16-character strings.
val compare : t -> t -> int
The comparison function for 16-character digest, with the same specification as compare and the
implementation shared with String.compare . Along with the type t , this function compare allows the
module Digest to be passed as argument to the functors Set.Make and Map.Make .
Since 4.00.0
val equal : t -> t -> bool
The equal function for 16-character digest.
Since 4.03.0
val string : string -> t
Return the digest of the given string.
val bytes : bytes -> t
Return the digest of the given byte sequence.
Since 4.02.0
val substring : string -> int -> int -> t
Digest.substring s ofs len returns the digest of the substring of s starting at index ofs and containing
len characters.
val subbytes : bytes -> int -> int -> t
Digest.subbytes s ofs len returns the digest of the subsequence of s starting at index ofs and containing
len bytes.
Since 4.02.0
val channel : in_channel -> int -> t
If len is nonnegative, Digest.channel ic len reads len characters from channel ic and returns their
digest, or raises End_of_file if end-of-file is reached before len characters are read. If len is
negative, Digest.channel ic len reads all characters from ic until end-of-file is reached and return
their digest.
val file : string -> t
Return the digest of the file whose name is given.
val output : out_channel -> t -> unit
Write a digest on the given output channel.
val input : in_channel -> t
Read a digest from the given input channel.
val to_hex : t -> string
Return the printable hexadecimal representation of the given digest. Raise Invalid_argument if the
argument is not exactly 16 bytes.
val from_hex : string -> t
Convert a hexadecimal representation back into the corresponding digest. Raise Invalid_argument if the
argument is not exactly 32 hexadecimal characters.
Since 4.00.0