Module Digest.MD5

MD5 is the MD5 hash function. It produces 128-bit (16-byte) digests and is not cryptographically secure at all. It should be used only for compatibility with earlier designs that mandate the use of MD5.

since 5.2

type t = string

type t = string;

The type of digests.

val hash_length : int

let hash_length: int;

The length of digests, in bytes.

val compare : t -> t -> int

let compare: t => t => int;

Compare two digests, with the same specification as Stdlib.compare.

val equal : t -> t -> bool

let equal: t => t => bool;

Test two digests for equality.

val string : string -> t

let string: string => t;

Return the digest of the given string.

val bytes : bytes -> t

let bytes: bytes => t;

Return the digest of the given byte sequence.

val substring : string -> int -> int -> t

let substring: string => int => int => t;

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

let subbytes: bytes => int => int => t;

subbytes s ofs len returns the digest of the subsequence of s starting at index ofs and containing len bytes.

val channel : in_channel -> int -> t

let channel: in_channel => int => t;

Read characters from the channel and return their digest. See Digest.channel for the full specification.

val file : string -> t

let file: string => t;

Return the digest of the file whose name is given.

val output : out_channel -> t -> unit

let output: out_channel => t => unit;

Write a digest on the given output channel.

val input : in_channel -> t

let input: in_channel => t;

Read a digest from the given input channel.

val to_hex : t -> string

let to_hex: t => string;

Return the printable hexadecimal representation of the given digest.

raises Invalid_argument if the length of the argument is not hash_length,

val of_hex : string -> t

let of_hex: string => t;

Convert a hexadecimal representation back into the corresponding digest.

raises Invalid_argument if the length of the argument is not 2 * hash_length, or if the arguments contains non-hexadecimal characters.