This code implements the MD5 message-digest algorithm.

The algorithm is due to Ron Rivest. This code was written by Colin Plumb in 1993, no copyright is claimed. This code is in the public domain; do with it what you wish.

Equivalent code is available from RSA Data Security, Inc. This code has been tested against that, and is equivalent, except that you don't need to include two pages of legalese with every copy.

To compute the message digest of a chunk of bytes, create an TMD5 object, call Update() as needed on buffers full of bytes, and then call Final(), which will, optionally, fill a supplied 16-byte array with the digest.

Definition at line 46 of file TMD5.h.

Public Member Functions
	TMD5 ()

	TMD5 (const UChar_t *digest)
	Create finalized TMD5 object containing passed in 16 byte digest. More...

	TMD5 (const TMD5 &md5)
	MD5 copy ctor. More...

virtual	~TMD5 ()

TMD5 &	operator= (const TMD5 &rhs)
	MD5 assignment operator. More...

void	Update (const UChar_t *buf, UInt_t len)
	Update TMD5 object to reflect the concatenation of another buffer full of bytes. More...

void	Final ()
	MD5 finalization, ends an MD5 message-digest operation, writing the the message digest and zeroizing the context. More...

void	Final (UChar_t digest[16])
	MD5 finalization, ends an MD5 message-digest operation, writing the the message digest and zeroizing the context. More...

void	Print () const
	Print digest in ascii hex form. More...

const char *	AsString () const
	Return message digest as string. More...

Int_t	SetDigest (const char *md5ascii)
	Set the digest from the ASCII representation 'md5ascii'. More...

Static Public Member Functions
static TMD5 *	ReadChecksum (const char *file)
	Returns checksum stored in ASCII in specified file. More...

static Int_t	WriteChecksum (const char file, const TMD5 md5)
	Writes checksum in ASCII format to specified file. More...

static TMD5 *	FileChecksum (const char *file)
	Returns checksum of specified file. More...

static Int_t	FileChecksum (const char *file, UChar_t digest[16])
	Returns checksum of specified file in digest argument. More...

Private Member Functions
void	Transform (UInt_t buf[4], const UChar_t in[64])
	The core of the MD5 algorithm, this alters an existing MD5 hash to reflect the addition of 16 longwords of new data. More...

void	Encode (UChar_t out, const UInt_t in, UInt_t len)
	Encodes input into output. Assumes len is a multiple of 4. More...

void	Decode (UInt_t out, const UChar_t in, UInt_t len)
	Decodes input into output. Assumes len is a multiple of 4. More...

Private Attributes
UInt_t	fBuf [4]

UInt_t	fBits [2]
	temp buffer More...

UChar_t	fIn [64]
	temp buffer More...

Char_t	fString [33]
	temp buffer More...

UChar_t	fDigest [16]
	string representation of digest More...

Bool_t	fFinalized

Friends
Bool_t	operator== (const TMD5 &m1, const TMD5 &m2)
	Compare two message digests for equality. More...

#include <TMD5.h>

Constructor & Destructor Documentation

TMD5::TMD5 ( )

Referenced by FileChecksum(), and ReadChecksum().

TMD5::TMD5 ( const UChar_t * digest )

Create finalized TMD5 object containing passed in 16 byte digest.

Definition at line 58 of file TMD5.cxx.

TMD5::TMD5 ( const TMD5 & md5 )

MD5 copy ctor.

Special copy ctor avoids copying unnecessary temp arrays when finalized.

Definition at line 73 of file TMD5.cxx.

virtual TMD5::~TMD5 ( )

inlinevirtual

Definition at line 66 of file TMD5.h.

Member Function Documentation

const char * TMD5::AsString ( ) const

Return message digest as string.

Returns "" in case Final() has not yet been called.

Definition at line 218 of file TMD5.cxx.

Referenced by TFilePrefetch::CheckBlockInCache(), TDataSetManagerFile::CheckLocalCache(), TDataSetManagerFile::ChecksumDataSet(), TMakeProject::ChopFileName(), TDataSetManagerFile::CreateLsFile(), TXProofMgr::GetFile(), TFileCollection::GetFilesOnServer(), TFileCollection::GetFilesPerServer(), TAliEnFind::GetSearchId(), TString::MD5(), Print(), TSelEventGen::Process(), TXProofMgr::PutFile(), TFilePrefetch::SaveBlockInCache(), and WriteChecksum().

void TMD5::Decode	(	UInt_t *	out,
		const UChar_t *	in,
		UInt_t	len
	)

private

Decodes input into output. Assumes len is a multiple of 4.

Definition at line 253 of file TMD5.cxx.

Referenced by Transform().

void TMD5::Encode	(	UChar_t *	out,
		const UInt_t *	in,
		UInt_t	len
	)

private

Encodes input into output. Assumes len is a multiple of 4.

Definition at line 238 of file TMD5.cxx.

Referenced by Final().

TMD5 * TMD5::FileChecksum ( const char * file )

static

Returns checksum of specified file.

The returned TMD5 object must be deleted by the user. Returns 0 in case the file does not exists or in case of error. This function preserves the modtime of the file so it can be safely used in conjunction with methods that keep track of the file's modtime. Static utility function.

Definition at line 472 of file TMD5.cxx.

Referenced by TProof::BuildPackageOnClient(), TApplicationRemote::CheckFile(), TProof::CheckFile(), TDataSetManagerFile::CheckLocalCache(), TDataSetManagerFile::ChecksumDataSet(), TProofLite::CopyMacroToCache(), TDataSetManagerFile::CreateLsFile(), FileChecksum(), TXProofMgr::GetFile(), TProofServ::HandleCache(), TApplicationServer::HandleCheckFile(), TProofServ::HandleCheckFile(), TDataSetManagerFile::NotifyUpdate(), TSelEventGen::Process(), TXProofMgr::PutFile(), TProofPlayer::ReinitSelector(), TProof::UploadPackage(), and TDataSetManagerFile::WriteDataSet().

Int_t TMD5::FileChecksum	(	const char *	file,
		UChar_t	digest[16]
	)

static

Returns checksum of specified file in digest argument.

Returns -1 in case of error, 0 otherwise. This method preserves the modtime of the file so it can be safely used in conjunction with methods that keep track of the file's modtime. Static utility function.

Definition at line 536 of file TMD5.cxx.

void TMD5::Final ( )

MD5 finalization, ends an MD5 message-digest operation, writing the the message digest and zeroizing the context.

Definition at line 165 of file TMD5.cxx.

Referenced by Memstat::TMemStatMng::AddPointer(), TFilePrefetch::CheckBlockInCache(), TMacro::Checksum(), TMakeProject::ChopFileName(), FileChecksum(), Final(), TUUID::GetRandomInfo(), TAliEnFind::GetSearchId(), TString::MD5(), TFileInfo::Print(), and TFilePrefetch::SaveBlockInCache().

void TMD5::Final ( UChar_t digest[16] )

MD5 finalization, ends an MD5 message-digest operation, writing the the message digest and zeroizing the context.

Returns digest.

Definition at line 155 of file TMD5.cxx.

TMD5 & TMD5::operator= ( const TMD5 & rhs )

MD5 assignment operator.

Special assignment operator avoids copying unnecessary temp arrays when finalized.

Definition at line 88 of file TMD5.cxx.

void TMD5::Print ( ) const

Print digest in ascii hex form.

Definition at line 204 of file TMD5.cxx.

TMD5 * TMD5::ReadChecksum ( const char * file )

static

Returns checksum stored in ASCII in specified file.

Use to read files created via WriteChecksum(). The returned TMD5 object must be deleted by the user. Returns 0 in case the file cannot be opened or in case of error. Static utility function.

Definition at line 420 of file TMD5.cxx.

Referenced by TDataSetManagerFile::CheckLocalCache(), TDataSetManagerFile::GetDataSet(), TProofServ::HandleCheckFile(), and TProof::UploadPackageOnClient().

Int_t TMD5::SetDigest ( const char * md5ascii )

Set the digest from the ASCII representation 'md5ascii'.

The caller is responsible to make sure that the 32 chars md5ascii are valid. Returns -1 if md5ascii is malformed, returns 0 otherwise.

Definition at line 393 of file TMD5.cxx.

Referenced by TFileInfo::ParseInput(), and ReadChecksum().

void TMD5::Transform	(	UInt_t	buf[4],
		const UChar_t	in[64]
	)

private

The core of the MD5 algorithm, this alters an existing MD5 hash to reflect the addition of 16 longwords of new data.

Update() blocks the data and converts bytes into longwords for this routine.

Definition at line 279 of file TMD5.cxx.

Referenced by Update().

void TMD5::Update	(	const UChar_t *	buf,
		UInt_t	len
	)

Update TMD5 object to reflect the concatenation of another buffer full of bytes.

Definition at line 106 of file TMD5.cxx.

Referenced by Memstat::TMemStatMng::AddPointer(), TFilePrefetch::CheckBlockInCache(), TMacro::Checksum(), TMakeProject::ChopFileName(), FileChecksum(), Final(), TUUID::GetRandomInfo(), TAliEnFind::GetSearchId(), TString::MD5(), and TFilePrefetch::SaveBlockInCache().

Int_t TMD5::WriteChecksum	(	const char *	file,
		const TMD5 *	md5
	)

static

Writes checksum in ASCII format to specified file.

This file can directly be read by ReadChecksum(). The md5 must have been finalized. Returns -1 in case file cannot be opened or in case of error, 0 otherwise. Static utility function.

Definition at line 450 of file TMD5.cxx.

Referenced by TDataSetManagerFile::CheckLocalCache(), TDataSetManagerFile::ChecksumDataSet(), TProofServ::HandleCache(), TProofServ::HandleCheckFile(), and TProof::UploadPackageOnClient().