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MD5 hash

A function that computes an MD5 hash from a block of bytes. MD5 isn't cryptographically secure, but it's a handy way of condensing a block of data into a short string.

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open System.Security.Cryptography
open System.Text

let md5 (data : byte array) : string =
    use md5 = MD5.Create()
    (StringBuilder(), md5.ComputeHash(data))
    ||> Array.fold (fun sb b -> sb.Append(b.ToString("x2")))
    |> string

let hash = md5 "hello world"B;
namespace System
namespace System.Security
namespace System.Security.Cryptography
namespace System.Text
val md5 : data:byte array -> string

Full name: Script.md5
val data : byte array
Multiple items
val byte : value:'T -> byte (requires member op_Explicit)

Full name: Microsoft.FSharp.Core.Operators.byte

--------------------
type byte = System.Byte

Full name: Microsoft.FSharp.Core.byte
type 'T array = 'T []

Full name: Microsoft.FSharp.Core.array<_>
Multiple items
val string : value:'T -> string

Full name: Microsoft.FSharp.Core.Operators.string

--------------------
type string = System.String

Full name: Microsoft.FSharp.Core.string
val md5 : MD5
type MD5 =
  inherit HashAlgorithm
  static member Create : unit -> MD5 + 1 overload

Full name: System.Security.Cryptography.MD5
MD5.Create() : MD5
MD5.Create(algName: string) : MD5
Multiple items
type StringBuilder =
  new : unit -> StringBuilder + 5 overloads
  member Append : value:string -> StringBuilder + 18 overloads
  member AppendFormat : format:string * arg0:obj -> StringBuilder + 4 overloads
  member AppendLine : unit -> StringBuilder + 1 overload
  member Capacity : int with get, set
  member Chars : int -> char with get, set
  member Clear : unit -> StringBuilder
  member CopyTo : sourceIndex:int * destination:char[] * destinationIndex:int * count:int -> unit
  member EnsureCapacity : capacity:int -> int
  member Equals : sb:StringBuilder -> bool
  ...

Full name: System.Text.StringBuilder

--------------------
StringBuilder() : unit
StringBuilder(capacity: int) : unit
StringBuilder(value: string) : unit
StringBuilder(value: string, capacity: int) : unit
StringBuilder(capacity: int, maxCapacity: int) : unit
StringBuilder(value: string, startIndex: int, length: int, capacity: int) : unit
HashAlgorithm.ComputeHash(buffer: byte []) : byte []
HashAlgorithm.ComputeHash(inputStream: System.IO.Stream) : byte []
HashAlgorithm.ComputeHash(buffer: byte [], offset: int, count: int) : byte []
module Array

from Microsoft.FSharp.Collections
val fold : folder:('State -> 'T -> 'State) -> state:'State -> array:'T [] -> 'State

Full name: Microsoft.FSharp.Collections.Array.fold
val sb : StringBuilder
val b : byte
StringBuilder.Append(value: char []) : StringBuilder
   (+0 other overloads)
StringBuilder.Append(value: obj) : StringBuilder
   (+0 other overloads)
StringBuilder.Append(value: uint64) : StringBuilder
   (+0 other overloads)
StringBuilder.Append(value: uint32) : StringBuilder
   (+0 other overloads)
StringBuilder.Append(value: uint16) : StringBuilder
   (+0 other overloads)
StringBuilder.Append(value: decimal) : StringBuilder
   (+0 other overloads)
StringBuilder.Append(value: float) : StringBuilder
   (+0 other overloads)
StringBuilder.Append(value: float32) : StringBuilder
   (+0 other overloads)
StringBuilder.Append(value: int64) : StringBuilder
   (+0 other overloads)
StringBuilder.Append(value: int) : StringBuilder
   (+0 other overloads)
System.Byte.ToString() : string
System.Byte.ToString(provider: System.IFormatProvider) : string
System.Byte.ToString(format: string) : string
System.Byte.ToString(format: string, provider: System.IFormatProvider) : string
val hash : string

Full name: Script.hash
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More information

Link:http://fssnip.net/3D
Posted:6 years ago
Author:Tim Robinson
Tags: md5 , hashing