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tdepim/libkpgp/kpgpbase6.cpp

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/*
kpgpbase6.cpp
Copyright (C) 2001,2002 the KPGP authors
See file AUTHORS.kpgp for details
This file is part of KPGP, the KDE PGP/GnuPG support library.
KPGP is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "kpgpbase.h"
#include <string.h> /* strncmp */
#include <assert.h>
#include <tqdatetime.h>
#include <tdelocale.h>
#include <kdebug.h>
#define PGP6 "pgp"
namespace Kpgp {
Base6::Base6()
: Base2()
{
}
Base6::~Base6()
{
}
int
Base6::decrypt( Block& block, const TQString &passphrase )
{
int index, index2;
int exitStatus = 0;
clear();
input = block.text();
exitStatus = run( PGP6 " +batchmode +language=C -f", passphrase);
if( !output.isEmpty() )
block.setProcessedText( output );
block.setError( error );
if(exitStatus == -1) {
errMsg = i18n("error running PGP");
status = RUN_ERR;
block.setStatus( status );
return status;
}
// encrypted message
if( error.find("File is encrypted.") != -1)
{
//kdDebug(5100) << "kpgpbase: message is encrypted" << endl;
status |= ENCRYPTED;
if((index = error.find("Key for user ID")) != -1)
{
// Find out the key for which the phrase is needed
index = error.find(':', index) + 2;
index2 = error.find('\n', index);
block.setRequiredUserId( error.mid(index, index2 - index) );
//kdDebug(5100) << "Base: key needed is \"" << block.requiredUserId() << "\"!\n";
// Test output length to find out, if the passphrase is
// bad. If someone knows a better way, please fix this.
/// ### This could be done by forcing PGP6 to be more verbose
/// by adding an additional '+verbose=2' to the command line
if (!passphrase || !output.length())
{
errMsg = i18n("Bad passphrase; could not decrypt.");
//kdDebug(5100) << "Base: passphrase is bad" << endl;
status |= BADPHRASE;
status |= ERROR;
}
}
else if( error.find("You do not have the secret key needed to decrypt this file.") != -1)
{
errMsg = i18n("You do not have the secret key for this message.");
//kdDebug(5100) << "Base: no secret key for this message" << endl;
status |= NO_SEC_KEY;
status |= ERROR;
}
}
// signed message
// Examples (made with PGP 6.5.8)
/* Example no. 1 (signed with unknown key):
* File is signed. signature not checked.
* Signature made 2001/11/25 11:55 GMT
* key does not meet validity threshold.
*
* WARNING: Because this public key is not certified with a trusted
* signature, it is not known with high confidence that this public key
* actually belongs to: "(KeyID: 0x475027BD)".
*/
/* Example no. 2 (signed with untrusted key):
* File is signed. Good signature from user "Joe User <joe@foo.bar>".
* Signature made 2001/12/05 13:09 GMT
*
* WARNING: Because this public key is not certified with a trusted
* signature, it is not known with high confidence that this public key
* actually belongs to: "Joe User <joe@foo.bar>".
*/
/* Example no. 3 (signed with trusted key):
* File is signed. Good signature from user "Joe User <joe@foo.bar>".
* Signature made 2001/12/05 13:09 GMT
*/
if(((index = error.find("File is signed.")) != -1)
|| (error.find("Good signature") != -1 ))
{
//kdDebug(5100) << "Base: message is signed" << endl;
status |= SIGNED;
// determine the signature date
if( ( index2 = error.find( "Signature made", index ) ) != -1 )
{
index2 += 15;
int eol = error.find( '\n', index2 );
block.setSignatureDate( error.mid( index2, eol-index2 ) );
kdDebug(5100) << "Message was signed on '" << block.signatureDate() << "'\n";
}
else
block.setSignatureDate( TQCString() );
// determine signature status and signature key
if( error.find("signature not checked") != -1)
{
index = error.find("KeyID:",index);
block.setSignatureKeyId( error.mid(index+9,8) );
block.setSignatureUserId( TQString() );
status |= UNKNOWN_SIG;
status |= GOODSIG;
}
else if((index = error.find("Good signature")) != -1 )
{
status |= GOODSIG;
// get signer
index = error.find('"',index)+1;
index2 = error.find('"', index);
block.setSignatureUserId( error.mid(index, index2-index) );
// get key ID of signer
index = error.find("KeyID:",index2);
if (index == -1)
block.setSignatureKeyId( TQCString() );
else
block.setSignatureKeyId( error.mid(index+9,8) );
}
else if( error.find("Can't find the right public key") != -1 )
{
// #### fix this hack
// #### This doesn't happen with PGP 6.5.8 because it seems to
// #### automatically create an empty pubring if it doesn't exist.
status |= UNKNOWN_SIG;
status |= GOODSIG; // this is a hack...
block.setSignatureUserId( i18n("??? (file ~/.pgp/pubring.pkr not found)") );
block.setSignatureKeyId( "???" );
}
else
{
status |= ERROR;
block.setSignatureUserId( TQString() );
block.setSignatureKeyId( TQCString() );
}
}
//kdDebug(5100) << "status = " << status << endl;
block.setStatus( status );
return status;
}
Key*
Base6::readPublicKey( const KeyID& keyID,
const bool readTrust /* = false */,
Key* key /* = 0 */ )
{
int exitStatus = 0;
status = 0;
exitStatus = run( PGP6 " +batchmode -compatible +verbose=0 +language=C -kvvc "
"0x" + keyID, 0, true );
if(exitStatus != 0) {
status = ERROR;
return 0;
}
key = parseSingleKey( output, key );
if( key == 0 )
{
return 0;
}
if( readTrust )
{
exitStatus = run( PGP6 " +batchmode -compatible +verbose=0 +language=C -kc "
"0x" + keyID, 0, true );
if(exitStatus != 0) {
status = ERROR;
return 0;
}
parseTrustDataForKey( key, output );
}
return key;
}
KeyList
Base6::publicKeys( const TQStringList & patterns )
{
return doGetPublicKeys( PGP6 " +batchmode -compatible +verbose=0 "
"+language=C -kvvc", patterns );
}
/*
TQStrList
Base6::pubKeys()
{
int index, index2;
int exitStatus = 0;
int compatibleMode = 1;
status = 0;
exitStatus = run("pgp +batchmode +language=C -kv -f");
if(exitStatus != 0) {
status = ERROR;
return 0;
}
//truncate trailing "\n"
if (error.length() > 1) error.truncate(error.length()-1);
TQStrList publicKeys;
index = error.find("bits/keyID",1); // skip first to "\n"
if (index ==-1)
{
index = error.find("Type bits",1); // skip first to "\n"
if (index == -1)
return 0;
else
compatibleMode = 0;
}
while( (index = error.find("\n",index)) != -1)
{
//parse line
TQCString line;
if( (index2 = error.find("\n",index+1)) != -1)
// skip last line
{
int index3;
if (compatibleMode)
{
int index_pub = error.find("pub ",index);
int index_sec = error.find("sec ",index);
if (index_pub < 0)
index3 = index_sec;
else if (index_sec < 0)
index3 = index_pub;
else
index3 = (index_pub < index_sec ? index_pub : index_sec);
}
else
{
int index_rsa = error.find("RSA ",index);
int index_dss = error.find("DSS ",index);
if (index_rsa < 0)
index3 = index_dss;
else if (index_dss < 0)
index3 = index_rsa;
else
index3 = (index_rsa < index_dss ? index_rsa : index_dss);
}
if( (index3 >index2) || (index3 == -1) )
{
// second address for the same key
line = error.mid(index+1,index2-index-1);
line = line.stripWhiteSpace();
} else {
// line with new key
int index4 = error.find(TQRegExp("/\\d{2}/\\d{2} "), index);
line = error.mid(index4+7,index2-index4-7);
}
//kdDebug(5100) << "Base: found key for " << (const char *)line << endl;
// don't add PGP's comments to the key list
if (strncmp(line.data(),"*** KEY EXPIRED ***",19) &&
line.find(TQRegExp("^expires \\d{4}/\\d{2}/\\d{2}")) < 0 &&
strncmp(line.data(),"*** DEFAULT SIGNING KEY ***",27)) {
publicKeys.append(line);
}
}
else
break;
index = index2;
}
// Also look for pgp key groups
exitStatus = run("pgp +batchmode +language=C -gv -f");
if(exitStatus != 0) {
status = ERROR;
return 0;
}
index = 0;
while ( (index = error.find("\n >", index)) != -1 ) {
TQCString line;
index += 4;
index2 = error.find(" \"", index);
line = error.mid(index, index2-index+1).stripWhiteSpace();
//kdDebug(5100) << "Base6: found key group for " << line << endl;
publicKeys.append(line);
}
return publicKeys;
}
*/
KeyList
Base6::secretKeys( const TQStringList & patterns )
{
return publicKeys( patterns );
}
int
Base6::isVersion6()
{
int exitStatus = 0;
exitStatus = run( PGP6, 0, true );
if(exitStatus == -1) {
errMsg = i18n("error running PGP");
status = RUN_ERR;
return 0;
}
if( error.find("Version 6") != -1)
{
//kdDebug(5100) << "kpgpbase: pgp version 6.x detected" << endl;
return 1;
}
//kdDebug(5100) << "kpgpbase: not pgp version 6.x" << endl;
return 0;
}
Key*
Base6::parseKeyData( const TQCString& output, int& offset, Key* key /* = 0 */ )
// This function parses the data for a single key which is output by PGP 6
// with the following command line arguments:
// +batchmode -compatible +verbose=0 +language=C -kvvc
// It expects the key data to start at offset and returns the start of
// the next key's data in offset.
{
if( ( strncmp( output.data() + offset, "DSS", 3 ) != 0 ) &&
( strncmp( output.data() + offset, "RSA", 3 ) != 0 ) )
{
kdDebug(5100) << "Unknown key type or corrupt key data.\n";
return 0;
}
Subkey *subkey = 0;
bool firstLine = true;
bool canSign = false;
bool canEncr = false;
bool fpr = false;
while( true )
{
int eol;
// search the end of the current line
if( ( eol = output.find( '\n', offset ) ) == -1 )
break;
//kdDebug(5100) << "Parsing: " << output.mid(offset, eol-offset) << endl;
if( firstLine && ( !strncmp( output.data() + offset, "DSS", 3 ) ||
!strncmp( output.data() + offset, "RSA", 3 ) ) )
{ // line contains primary key data
// Example 1:
// RSA 1024 0xE2D074D3 2001/09/09 Test Key <testkey@xyz>
// Example 2 (disabled key):
// RSA@ 1024 0x8CCB2C1B 2001/11/04 Disabled Test Key <disabled@xyz>
// Example 3 (expired key):
// RSA 1024 0x7B94827D 2001/09/09 *** KEY EXPIRED ***
// Example 4 (revoked key):
// RSA 1024 0x956721F9 2001/09/09 *** KEY REVOKED ***
// Example 5 (default signing key):
// RSA 1024 0x12345678 2001/09/09 *** DEFAULT SIGNING KEY ***
// Example 6 (expiring key):
// RSA 2048 0xC11DB2E5 2000/02/24 expires 2001/12/31
// Example 7 (complex example):
// DSS 1024 0x80E104A7 2000/06/05 expires 2002/05/31
// DSS 1024 0x80E104A7 2001/06/27 *** KEY REVOKED ***expires 2002/06/27
// DH 1024 0x80E104A7 2000/06/05 *** KEY REVOKED ****** KEY EXPIRED ***
//kdDebug(5100)<<"Primary key data:\n";
bool sign = false;
bool encr = false;
// set default key capabilities
if( !strncmp( output.data() + offset, "DSS", 3 ) )
sign = true;
if( !strncmp( output.data() + offset, "RSA", 3 ) )
{
sign = true;
encr = true;
}
int pos, pos2;
if( key == 0 )
key = new Key();
else
key->clear();
subkey = new Subkey( "", false );
key->addSubkey( subkey );
// expiration date defaults to never
subkey->setExpirationDate( -1 );
// Key Flags
switch( output[offset+3] )
{
case ' ': // nothing special
break;
case '@': // disabled key
subkey->setDisabled( true );
key->setDisabled( true );
break;
default:
kdDebug(5100) << "Unknown key flag.\n";
}
// Key Length
pos = offset + 4;
while( output[pos] == ' ' )
pos++;
pos2 = output.find( ' ', pos );
subkey->setKeyLength( output.mid( pos, pos2-pos ).toUInt() );
//kdDebug(5100) << "Key Length: "<<subkey->keyLength()<<endl;
// Key ID
pos = pos2 + 1;
while( output[pos] == ' ' )
pos++;
pos += 2; // skip the '0x'
pos2 = output.find( ' ', pos );
subkey->setKeyID( output.mid( pos, pos2-pos ) );
//kdDebug(5100) << "Key ID: "<<subkey->keyID()<<endl;
// Creation Date
pos = pos2 + 1;
while( output[pos] == ' ' )
pos++;
pos2 = output.find( ' ', pos );
int year = output.mid( pos, 4 ).toInt();
int month = output.mid( pos+5, 2 ).toInt();
int day = output.mid( pos+8, 2 ).toInt();
TQDateTime dt( TQDate( year, month, day ), TQTime( 00, 00 ) );
TQDateTime epoch( TQDate( 1970, 01, 01 ), TQTime( 00, 00 ) );
// The calculated creation date isn't exactly correct because TQDateTime
// doesn't know anything about timezones and always assumes local time
// although epoch is of course UTC. But as PGP 6 anyway doesn't print
// the time this doesn't matter too much.
subkey->setCreationDate( epoch.secsTo( dt ) );
// User ID or key properties
pos = pos2 + 1;
while( output[pos] == ' ' )
pos++;
while( pos < eol )
{ // loop over User ID resp. key properties
if( !strncmp( output.data() + pos, "*** KEY REVOKED ***", 19 ) )
{
sign = false;
encr = false;
subkey->setRevoked( true );
key->setRevoked( true );
pos += 19;
//kdDebug(5100) << "Key was revoked.\n";
}
else if( !strncmp( output.data() + pos, "*** KEY EXPIRED ***", 19 ) )
{
sign = false;
encr = false;
subkey->setExpired( true );
key->setExpired( true );
pos += 19;
//kdDebug(5100) << "Key has expired.\n";
}
else if( !strncmp( output.data() + pos, "expires ", 8 ) )
{
pos += 8;
int year = output.mid( pos, 4 ).toInt();
int month = output.mid( pos+5, 2 ).toInt();
int day = output.mid( pos+8, 2 ).toInt();
TQDateTime dt( TQDate( year, month, day ), TQTime( 00, 00 ) );
// Here the same comments as for the creation date are valid.
subkey->setExpirationDate( epoch.secsTo( dt ) );
pos += 10;
//kdDebug(5100) << "Key expires...\n";
}
else if( !strncmp( output.data() + pos, "*** DEFAULT SIGNING KEY ***", 27 ) )
{
pos += 27;
//kdDebug(5100) << "Key is default signing key.\n";
}
else
{
TQCString uid = output.mid( pos, eol-pos );
key->addUserID( uid );
pos = eol;
//kdDebug(5100) << "User ID:"<<uid<<endl;
}
}
// set key capabilities of the primary subkey
subkey->setCanEncrypt( encr );
subkey->setCanSign( sign );
subkey->setCanCertify( sign );
// remember the global key capabilities
canSign = sign;
canEncr = encr;
}
else if( !strncmp( output.data() + offset, "DSS", 3 ) ||
!strncmp( output.data() + offset, " DH", 3 ) ||
!strncmp( output.data() + offset, "RSA", 3 ) )
{ // line contains secondary key data (or data for the next key)
if( fpr )
break; // here begins the next key's data
//kdDebug(5100)<<"Secondary key data:\n";
if( key == 0 )
break;
bool sign = false;
bool encr = false;
// set default key capabilities
if( !strncmp( output.data() + offset, "DSS", 3 ) )
sign = true;
if( !strncmp( output.data() + offset, " DH", 3 ) )
encr = true;
if( !strncmp( output.data() + offset, "RSA", 3 ) )
{
sign = true;
encr = true;
}
int pos, pos2;
// Key Length of secondary key (ignored)
pos = offset + 4;
while( output[pos] == ' ' )
pos++;
pos2 = output.find( ' ', pos );
// Key ID (ignored as it is anyway equal to the primary key id)
pos = pos2 + 1;
while( output[pos] == ' ' )
pos++;
pos2 = output.find( ' ', pos );
// Creation Date of secondary key (ignored)
pos = pos2 + 1;
while( output[pos] == ' ' )
pos++;
pos2 = output.find( ' ', pos );
// User ID or key properties
pos = pos2 + 1;
while( output[pos] == ' ' )
pos++;
while( pos < eol )
{ // loop over User ID resp. key properties
if( !strncmp( output.data() + pos, "*** KEY REVOKED ***", 19 ) )
{
sign = false;
encr = false;
pos += 19;
//kdDebug(5100) << "Key was revoked.\n";
}
else if( !strncmp( output.data() + pos, "*** KEY EXPIRED ***", 19 ) )
{
sign = false;
encr = false;
pos += 19;
//kdDebug(5100) << "Key has expired.\n";
}
else if( !strncmp( output.data() + pos, "expires ", 8 ) )
{
pos += 18; // skip the expiration date
//kdDebug(5100) << "Key expires...\n";
}
else if( !strncmp( output.data() + pos, "*** DEFAULT SIGNING KEY ***", 27 ) )
{
pos += 27;
//kdDebug(5100) << "Key is default signing key.\n";
}
else
{
TQCString uid = output.mid( pos, eol-pos );
key->addUserID( uid );
pos = eol;
//kdDebug(5100) << "User ID:"<<uid<<endl;
}
}
// store the global key capabilities
canSign = canSign || sign;
canEncr = canEncr || encr;
}
else if( !strncmp( output.data() + offset, "Unknown type", 12 ) )
{ // line contains key data of unknown type (ignored)
kdDebug(5100)<<"Unknown key type.\n";
}
else if( output[offset] == ' ' )
{ // line contains additional key data
if( key == 0 )
break;
//kdDebug(5100)<<"Additional key data:\n";
int pos = offset + 1;
while( output[pos] == ' ' )
pos++;
if( !strncmp( output.data() + pos, "Key fingerprint = ", 18 ) )
{ // line contains a fingerprint
// Example:
// Key fingerprint = D0 6C BB 3A F5 16 82 C4 F3 A0 8A B3 7B 16 99 70
fpr = true; // we found a fingerprint
pos += 18;
TQCString fingerprint = output.mid( pos, eol-pos );
// remove white space from the fingerprint
for ( int idx = 0 ; (idx = fingerprint.find(' ', idx)) >= 0 ; )
fingerprint.replace( idx, 1, "" );
//kdDebug(5100)<<"Fingerprint: "<<fingerprint<<endl;
assert( subkey != 0 );
subkey->setFingerprint( fingerprint );
}
else
{ // line contains an additional user id
// Example:
// Test key (2nd user ID) <abc@xyz>
//kdDebug(5100)<<"User ID: "<<output.mid( pos, eol-pos )<<endl;
key->addUserID( output.mid( pos, eol-pos ) );
}
}
else if( !strncmp( output.data() + offset, "sig", 3 ) )
{ // line contains signature data (ignored)
//kdDebug(5100)<<"Signature.\n";
}
else // end of key data
break;
firstLine = false;
offset = eol + 1;
}
if( key != 0 )
{
// set the global key capabilities
key->setCanEncrypt( canEncr );
key->setCanSign( canSign );
key->setCanCertify( canSign );
//kdDebug(5100)<<"Key capabilities: "<<(canEncr?"E":"")<<(canSign?"SC":"")<<endl;
}
return key;
}
Key*
Base6::parseSingleKey( const TQCString& output, Key* key /* = 0 */ )
{
int offset;
// search start of header line
if( !strncmp( output.data(), "Type bits", 9 ) )
offset = 9;
else
{
offset = output.find( "\nType bits" );
if( offset == -1 )
return 0;
else
offset += 10;
}
// key data begins in the next line
offset = output.find( '\n', offset ) + 1;
if( offset == 0 )
return 0;
key = parseKeyData( output, offset, key );
//kdDebug(5100) << "finished parsing keys" << endl;
return key;
}
KeyList
Base6::parseKeyList( const TQCString& output, bool secretKeys )
{
kdDebug(5100) << "Kpgp::Base6::parseKeyList()" << endl;
KeyList keys;
Key *key = 0;
int offset;
// search start of header line
if( !strncmp( output.data(), "Type bits", 9 ) )
offset = 0;
else
{
offset = output.find( "\nType bits" ) + 1;
if( offset == 0 )
return keys;
}
// key data begins in the next line
offset = output.find( '\n', offset ) + 1;
if( offset == -1 )
return keys;
do
{
key = parseKeyData( output, offset );
if( key != 0 )
{
key->setSecret( secretKeys );
keys.append( key );
}
}
while( key != 0 );
//kdDebug(5100) << "finished parsing keys" << endl;
return keys;
}
void
Base6::parseTrustDataForKey( Key* key, const TQCString& str )
{
if( ( key == 0 ) || str.isEmpty() )
return;
TQCString keyID = "0x" + key->primaryKeyID();
UserIDList userIDs = key->userIDs();
// search the start of the trust data
int offset = str.find( "\n\n KeyID" );
if( offset == -1 )
return;
offset = str.find( '\n', offset ) + 1;
if( offset == 0 )
return;
bool ultimateTrust = false;
if( !strncmp( str.data() + offset+13, "ultimate", 8 ) )
ultimateTrust = true;
while( true )
{ // loop over all trust information about this key
int eol;
// search the end of the current line
if( ( eol = str.find( '\n', offset ) ) == -1 )
break;
if( str[offset+23] != ' ' )
{ // line contains a validity value for a user ID
// determine the validity
Validity validity = KPGP_VALIDITY_UNKNOWN;
if( !strncmp( str.data() + offset+23, "complete", 8 ) )
if( ultimateTrust )
validity = KPGP_VALIDITY_ULTIMATE;
else
validity = KPGP_VALIDITY_FULL;
else if( !strncmp( str.data() + offset+23, "marginal", 8 ) )
validity = KPGP_VALIDITY_MARGINAL;
else if( !strncmp( str.data() + offset+23, "invalid", 7 ) )
validity = KPGP_VALIDITY_UNDEFINED;
// determine the user ID
int pos = offset + 33;
TQString uid = str.mid( pos, eol-pos );
// set the validity of the corresponding user ID
for( UserIDListIterator it( userIDs ); it.current(); ++it )
if( (*it)->text() == uid )
{
kdDebug(5100)<<"Setting the validity of "<<uid<<" to "<<validity<<endl;
(*it)->setValidity( validity );
break;
}
}
offset = eol + 1;
}
}
} // namespace Kpgp
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