CentOS 7.0 - man page for digest (centos section 3)
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Digest(3) OCaml library Digest(3)
Digest - MD5 message 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 Perva-
sives.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 .
val string : string -> t
Return the digest of the given string.
val substring : string -> int -> int -> t
Digest.substring s ofs len returns the digest of the substring of s starting at character
number ofs and containing len characters.
val channel : Pervasives.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 charac-
ters 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 : Pervasives.out_channel -> t -> unit
Write a digest on the given output channel.
val input : Pervasives.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.
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.
OCamldoc 2014-06-09 Digest(3)
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