//  TASIPPGPkey.cp - AppleShare PGP Key Object  

// 

// Apple Macintosh Developer Technical Support

// Written by:  Vinnie Moscaritolo

//

//  Copyright (work in progress)  Apple Computer, Inc All rights reserved.

//

// You may incorporate this sample code into your applications without

// restriction, though the sample code has been provided "AS IS" and the

// responsibility for its operation is 100% yours.  However, what you are

// not permitted to do is to redistribute the source as "DSC Sample Code"

// after having made changes. If you're going to re-distribute the source,

// we require that you make it clear in the source that the code was

// descended from Apple Sample Code, but that you've made changes.

// 

#include <string.h>

#include "TASIPPGPkey.h"

#include "TPGPException.h"

// ---------------------------------------------------------------------------

void TASIPPGPkey::Initialize(const unsigned char* serverSigBuf)

// ---------------------------------------------------------------------------

{    

    PGPFilterRef    theFilter       = kInvalidPGPFilterRef;

    PGPKeyIterRef   theIterator     = kInvalidPGPKeyIterRef;

    PGPKeyListRef   theKeyListRef   = kInvalidPGPKeyListRef;

    PGPKeyRef       bestKey         = kInvalidPGPKeyRef;

    PGPKeyRef       expiredKey       = kInvalidPGPKeyRef;

    PGPKeyRef       aKey            = kInvalidPGPKeyRef;

    PGPKeySetRef    newKeySet       = NULL;

    PGPUInt32       numKeys;

    const   char hexDigit[] = "0123456789ABCDEF";

    char    *p;

    int     strIndex;

// calculate server name

    strcpy(fNameString, "asip:");

    p = &fNameString[5];

    for(strIndex = 0 ; strIndex < 16 ; strIndex++)

    {

        *p++ = hexDigit[serverSigBuf[strIndex]>>4];

        *p++ = hexDigit[serverSigBuf[strIndex]&0xF];

    };

    *p = '\0';

// Find key in database

    ThrowIfPGPErr( PGPNewUserIDEmailFilter(fgContext,fNameString, kPGPMatchEqual, &theFilter));

    ThrowIfPGPErr( PGPFilterKeySet(fgPGPKeySetRef , theFilter, &newKeySet));

    PGPFreeFilter(theFilter);

    ThrowIfPGPErr( PGPOrderKeySet(newKeySet,kPGPAnyOrdering, &theKeyListRef));

    ThrowIfPGPErr( PGPNewKeyIter( theKeyListRef, &theIterator ));

    ThrowIfPGPErr( PGPCountKeys(newKeySet, &numKeys));

    if(numKeys > 0) 

    {

        Boolean canVerify, isExpired;

        while(IsntPGPError (PGPKeyIterNext( theIterator, &aKey )))

        {

            ThrowIfPGPErr( PGPGetKeyBoolean (aKey, kPGPKeyPropCanVerify,  &canVerify));

            ThrowIfPGPErr( PGPGetKeyBoolean (aKey, kPGPKeyPropIsExpired,  &isExpired));

            if(canVerify)

                if(!isExpired) bestKey = aKey;

                else expiredKey = aKey;

        } 

    if ( PGPKeyRefIsValid( bestKey ) ) TPGPkey::Initialize( bestKey );

    else if (PGPKeyRefIsValid(expiredKey) ) TPGPkey::Initialize( expiredKey );

    }

    PGPFreeKeyIter(theIterator );

    PGPFreeKeyList(theKeyListRef );

    PGPFreeKeySet(newKeySet );

 }

// ---------------------------------------------------------------------------

void TASIPPGPkey::GetKeyNamePString(StringPtr buf)

// ---------------------------------------------------------------------------

{

    if(buf)

    {

        memcpy(fNameString, &buf[1], strlen(fNameString));

        buf[0] = strlen(fNameString);

    }

}