zypp::Digest Class Reference

#include <Digest.h>

List of all members.

Public Member Functions
	Digest ()
	~Digest ()
bool	create (const std::string &name)
const std::string &	name ()
bool	update (const char *bytes, size_t len)
std::string	digest ()
Static Public Member Functions
static std::string	digest (const std::string &name, std::istream &is, size_t bufsize=4096)
Private Member Functions
	Digest (const Digest &d)
const Digest &	operator= (const Digest &d)
Private Attributes
P *	_dp
Classes
class	P

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Detailed Description

Compute Message Digests (MD5, SHA1 etc) The computation works by initializing the algorithm using create(). This will construct an internal state. successive calls to update() deliver the data for which the digest is to be computed. After all data has been deliverd, a call to digest() finalizes the computation and returns the result

Definition at line 44 of file Digest.h.

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Constructor & Destructor Documentation

zypp::Digest::Digest

(

const Digest &

d

)

[private]

zypp::Digest::Digest

(

)

Definition at line 117 of file Digest.cc.

zypp::Digest::~Digest

(

)

Definition at line 121 of file Digest.cc.

References _dp.

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Member Function Documentation

const Digest& zypp::Digest::operator=

(

const Digest &

d

)

[private]

bool zypp::Digest::create

(

const std::string &

name

)

initialize creation of a new message digest Since openssl is used as backend you may use anything that openssl supports (see man 1 dgst). Common examples are md5 or sha1. sha1 should be preferred when creating digests to verify the authenticity of something.

successive calls to this funcion will destroy the internal state and reinit from scratch

Parameters:

name

name of the message digest algorithm.

Returns:

whether an error occured

Definition at line 126 of file Digest.cc.

References _dp, zypp::Digest::P::cleanup(), zypp::Digest::P::initialized, zypp::Digest::P::maybeInit(), and zypp::Digest::P::name.

Referenced by digest().

const std::string & zypp::Digest::name

(

)

get the name of the current digest algorithm

Definition at line 138 of file Digest.cc.

References _dp, and zypp::Digest::P::name.

bool zypp::Digest::update	(	const char *	bytes,
		size_t	len
	)

feed data into digest computation algorithm

Parameters:

	bytes
	len

Returns:

whether an error occured

Definition at line 167 of file Digest.cc.

References _dp, zypp::Digest::P::cleanup(), zypp::Digest::P::finalized, zypp::Digest::P::maybeInit(), and zypp::Digest::P::mdctx.

Referenced by digest().

std::string zypp::Digest::digest

(

)

get hex string representation of the digest this function will finalize the digest computation. calls to update after this function will start from scratch

Returns:

hex string representation of the digest

Definition at line 143 of file Digest.cc.

References _dp, zypp::Digest::P::finalized, zypp::Digest::P::maybeInit(), zypp::Digest::P::md_len, zypp::Digest::P::md_value, and zypp::Digest::P::mdctx.

Referenced by zypp::filesystem::checksum(), zypp::CheckSum::CheckSum(), digest(), zypp::storage::XMLFilesBackend::fileNameForNVR(), zypp::storage::XMLFilesBackend::fullPathForNamedFlags(), and zypp::filesystem::md5sum().

std::string zypp::Digest::digest	(	const std::string &	name,
		std::istream &	is,
		size_t	bufsize = 4096
	)			[static]

compute digest of a stream. convenience function

calls create, update and digest in one function. The data for the computation is read from the stream

Parameters:

name

name of the digest algorithm,

See also:

create

Parameters:

	is	an input stream to get the data from
	bufsize	size of the buffer used for update(). Be careful, this is on the stack.

Returns:

the digest or empty on error

Definition at line 190 of file Digest.cc.

References create(), digest(), and update().

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Member Data Documentation

P* zypp::Digest::_dp [private]

Definition at line 47 of file Digest.h.

Referenced by create(), digest(), name(), update(), and ~Digest().

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The documentation for this class was generated from the following files:

• zypp/Digest.h
• zypp/Digest.cc

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