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	The MD5 module allows you to use the RSA Data Security Inc. MD5 Message

The MD5 module allows you to use the RSA Data Security Inc. MD5

Digest algorithm from within Perl programs.

Message Digest algorithm from within Perl programs.

	A new MD5 context object is created with the new operation.  Multiple

simultaneous digest contexts can be maintained, if desired.  The context is

A new MD5 context object is created with the new operation.  Multiple

updated with the add operation which adds the strings contained in the LIST

simultaneous digest contexts can be maintained, if desired.  The

parameter. Note, however, that add('foo', 'bar'), add('foo') followed by

context is updated with the add operation which adds the strings

add('bar') and add('foobar') should all give the same result.

contained in the LIST parameter. Note, however, that add('foo',

	The final message digest value is returned by the digest operation as a

'bar'), add('foo') followed by add('bar') and add('foobar') should

16-byte binary string. This operation delivers the result of add operations

all give the same result.

since the last new or reset operation.  Note that the digest operation is

effectively a destructive, read-once operation. Once it has been performed, the

The final message digest value is returned by the digest operation

context must be reset before being used to calculate another digest value.

as a 16-byte binary string. This operation delivers the result of

	Several convenience functions are also provided. The addfile operation

add operations since the last new or reset operation.  Note that

takes an open file-handle and reads it until end-of file in 1024 byte blocks

the digest operation is effectively a destructive, read-once

adding the contents to the context. The file-handle can either be specified by

operation. Once it has been performed, the context must be reset

name or passed as a type-glob reference. The hexdigest operation calls digest

before being used to calculate another digest value.

and returns the result as a printable string of hexdecimal digits.

	The hash operation can act as either a static member function (you

Several convenience functions are also provided. The addfile operation

invoke it on the MD5 class) or as a normal virtual function. In both cases it

takes an open file-handle and reads it until end-of file in 1024

performs the complete MD5 cycle (reset, add, digest) on the supplied scalar

byte blocks adding the contents to the context. The file-handle can

value. This is convenient for handling small quantities of data. When invoked on

either be specified by name or passed as a type-glob reference. The

the class a temporary context is created. When invoked through an already

hexdigest operation calls digest and returns the result as a printable

created context object, this context is used.  The latter form is slightly more

string of hexdecimal digits.

efficient. The hexhash operation is analogous to hexdigest.

The hash operation can act as either a static member function (you

invoke it on the MD5 class) or as a normal virtual function. In

both cases it performs the complete MD5 cycle (reset, add, digest)

on the supplied scalar value. This is convenient for handling small

quantities of data. When invoked on the class a temporary context

is created. When invoked through an already created context object,

this context is used.  The latter form is slightly more efficient.

The hexhash operation is analogous to hexdigest.

WWW: http://search.cpan.org/~gaas/MD5-2.03/