/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
 * Internal PKCS #11 functions. Should only be called by pkcs11.c
 */
#include "pkcs11.h"
#include "lgdb.h"

#include "pcertt.h"
#include "lowkeyi.h"
#include "pcert.h"
#include "blapi.h"
#include "secerr.h"
#include "secasn1.h"

/*
 * Cache the object we are working on during Set's and Get's
 */
typedef struct LGObjectCacheStr {
    CK_OBJECT_CLASS  objclass;
    CK_OBJECT_HANDLE handle;
    SDB              *sdb;
    void             *objectInfo;
    LGFreeFunc       infoFree;
    SECItem          dbKey;
} LGObjectCache;

static const CK_OBJECT_HANDLE lg_classArray[] = {
    0, CKO_PRIVATE_KEY, CKO_PUBLIC_KEY, CKO_SECRET_KEY,
    CKO_NSS_TRUST, CKO_NSS_CRL, CKO_NSS_SMIME,
     CKO_CERTIFICATE };

#define handleToClass(handle) \
    lg_classArray[((handle & LG_TOKEN_TYPE_MASK))>>LG_TOKEN_TYPE_SHIFT]


static void lg_DestroyObjectCache(LGObjectCache *obj);

static LGObjectCache *
lg_NewObjectCache(SDB *sdb, const SECItem *dbKey, CK_OBJECT_HANDLE handle)
{
    LGObjectCache *obj = NULL;
    SECStatus rv;

    obj = PORT_New(LGObjectCache);
    if (obj == NULL) {
	return NULL;
    }

    obj->objclass = handleToClass(handle);
    obj->handle = handle;
    obj->sdb = sdb;
    obj->objectInfo = NULL;
    obj->infoFree = NULL;
    obj->dbKey.data = NULL;
    obj->dbKey.len = 0;
    lg_DBLock(sdb);
    if (dbKey == NULL) {
	dbKey = lg_lookupTokenKeyByHandle(sdb,handle);
    }
    if (dbKey == NULL) {
	lg_DBUnlock(sdb);
	goto loser;
    }
    rv = SECITEM_CopyItem(NULL,&obj->dbKey,dbKey);
    lg_DBUnlock(sdb);
    if (rv != SECSuccess) {
	goto loser;
    }

    return obj;
loser:
    if (obj) {
	(void) lg_DestroyObjectCache(obj);
    }
    return NULL;

}

/*
 * free all the data associated with an object. Object reference count must
 * be 'zero'.
 */
static void
lg_DestroyObjectCache(LGObjectCache *obj)
{
    if (obj->dbKey.data) {
	PORT_Free(obj->dbKey.data);
	obj->dbKey.data = NULL;
    } 
    if (obj->objectInfo) {
	(*obj->infoFree)(obj->objectInfo);
	obj->objectInfo = NULL;
	obj->infoFree = NULL;
    }
    PORT_Free(obj);
}
/*
 * ******************** Attribute Utilities *******************************
 */

static CK_RV
lg_ULongAttribute(CK_ATTRIBUTE *attr, CK_ATTRIBUTE_TYPE type, CK_ULONG value)
{
    unsigned char *data;
    int i;

    if (attr->pValue == NULL) {
	attr->ulValueLen = 4;
	return CKR_OK;
    }
    if (attr->ulValueLen < 4) {
	attr->ulValueLen = (CK_ULONG) -1;
	return CKR_BUFFER_TOO_SMALL;
    }

    data = (unsigned char *)attr->pValue;
    for (i=0; i < 4; i++) {
	data[i] = (value >> ((3-i)*8)) & 0xff;
    }
    attr->ulValueLen = 4;
    return CKR_OK;
}

static CK_RV
lg_CopyAttribute(CK_ATTRIBUTE *attr, CK_ATTRIBUTE_TYPE type, 
				CK_VOID_PTR value, CK_ULONG len)
{

    if (attr->pValue == NULL) {
	attr->ulValueLen = len;
	return CKR_OK;
    }
    if (attr->ulValueLen < len) {
	attr->ulValueLen = (CK_ULONG) -1;
	return CKR_BUFFER_TOO_SMALL;
    }
    PORT_Memcpy(attr->pValue,value,len);
    attr->ulValueLen = len;
    return CKR_OK;
}

static CK_RV
lg_CopyAttributeSigned(CK_ATTRIBUTE *attribute, CK_ATTRIBUTE_TYPE type, 
				void  *value, CK_ULONG len)
{
    unsigned char * dval = (unsigned char *)value;
    if (*dval == 0) {
	dval++;
	len--;
    }
    return lg_CopyAttribute(attribute,type,dval,len);
}

static CK_RV
lg_CopyPrivAttribute(CK_ATTRIBUTE *attribute, CK_ATTRIBUTE_TYPE type, 
				void  *value, CK_ULONG len, SDB *sdbpw)
{
    SECItem plainText, *cipherText = NULL;
    CK_RV crv = CKR_USER_NOT_LOGGED_IN;
    SECStatus rv;

    plainText.data = value;
    plainText.len = len;
    rv = lg_util_encrypt(NULL, sdbpw, &plainText, &cipherText);
    if (rv != SECSuccess) {
	goto loser;
    }
    crv = lg_CopyAttribute(attribute,type,cipherText->data,cipherText->len);
loser:
    if (cipherText) {
	SECITEM_FreeItem(cipherText,PR_TRUE);
    }
    return crv;
}

static CK_RV
lg_CopyPrivAttrSigned(CK_ATTRIBUTE *attribute, CK_ATTRIBUTE_TYPE type, 
				void  *value, CK_ULONG len, SDB *sdbpw)
{
    unsigned char * dval = (unsigned char *)value;

    if (*dval == 0) {
	dval++;
	len--;
    }
    return lg_CopyPrivAttribute(attribute,type,dval,len,sdbpw);
}

static CK_RV
lg_invalidAttribute(CK_ATTRIBUTE *attr)
{
    attr->ulValueLen = (CK_ULONG) -1;
    return CKR_ATTRIBUTE_TYPE_INVALID;
}


#define LG_DEF_ATTRIBUTE(value,len) \
   { 0, value, len }

#define LG_CLONE_ATTR(attribute, type, staticAttr) \
    lg_CopyAttribute(attribute, type, staticAttr.pValue, staticAttr.ulValueLen)

CK_BBOOL lg_staticTrueValue = CK_TRUE;
CK_BBOOL lg_staticFalseValue = CK_FALSE;
static const CK_ATTRIBUTE lg_StaticTrueAttr = 
  LG_DEF_ATTRIBUTE(&lg_staticTrueValue,sizeof(lg_staticTrueValue));
static const CK_ATTRIBUTE lg_StaticFalseAttr = 
  LG_DEF_ATTRIBUTE(&lg_staticFalseValue,sizeof(lg_staticFalseValue));
static const CK_ATTRIBUTE lg_StaticNullAttr = LG_DEF_ATTRIBUTE(NULL,0);
char lg_StaticOneValue = 1;

/*
 * helper functions which get the database and call the underlying 
 * low level database function.
 */
static char *
lg_FindKeyNicknameByPublicKey(SDB *sdb, SECItem *dbKey)
{
    NSSLOWKEYDBHandle *keyHandle;
    char * label;

    keyHandle = lg_getKeyDB(sdb);
    if (!keyHandle) {
	return NULL;
    }

    label = nsslowkey_FindKeyNicknameByPublicKey(keyHandle, dbKey, 
						 sdb);
    return label;
}


NSSLOWKEYPrivateKey *
lg_FindKeyByPublicKey(SDB *sdb, SECItem *dbKey)
{
    NSSLOWKEYPrivateKey *privKey;
    NSSLOWKEYDBHandle   *keyHandle;

    keyHandle = lg_getKeyDB(sdb);
    if (keyHandle == NULL) {
	return NULL;
    }
    privKey = nsslowkey_FindKeyByPublicKey(keyHandle, dbKey, sdb);
    if (privKey == NULL) {
	return NULL;
    }
    return privKey;
}

static certDBEntrySMime *
lg_getSMime(LGObjectCache *obj)
{
    certDBEntrySMime *entry;
    NSSLOWCERTCertDBHandle *certHandle;

    if (obj->objclass != CKO_NSS_SMIME) {
	return NULL;
    }
    if (obj->objectInfo) {
	return (certDBEntrySMime *)obj->objectInfo;
    }

    certHandle = lg_getCertDB(obj->sdb);
    if (!certHandle) {
	return NULL;
    }
    entry = nsslowcert_ReadDBSMimeEntry(certHandle, (char *)obj->dbKey.data);
    obj->objectInfo = (void *)entry;
    obj->infoFree = (LGFreeFunc) nsslowcert_DestroyDBEntry;
    return entry;
}

static certDBEntryRevocation *
lg_getCrl(LGObjectCache *obj)
{
    certDBEntryRevocation *crl;
    PRBool isKrl;
    NSSLOWCERTCertDBHandle *certHandle;

    if (obj->objclass != CKO_NSS_CRL) {
	return NULL;
    }
    if (obj->objectInfo) {
	return (certDBEntryRevocation *)obj->objectInfo;
    }

    isKrl = (PRBool) (obj->handle == LG_TOKEN_KRL_HANDLE);
    certHandle = lg_getCertDB(obj->sdb);
    if (!certHandle) {
	return NULL;
    }

    crl = nsslowcert_FindCrlByKey(certHandle, &obj->dbKey, isKrl);
    obj->objectInfo = (void *)crl;
    obj->infoFree = (LGFreeFunc) nsslowcert_DestroyDBEntry;
    return crl;
}

static NSSLOWCERTCertificate *
lg_getCert(LGObjectCache *obj, NSSLOWCERTCertDBHandle *certHandle)
{
    NSSLOWCERTCertificate *cert;
    CK_OBJECT_CLASS objClass = obj->objclass;

    if ((objClass != CKO_CERTIFICATE) && (objClass != CKO_NSS_TRUST)) {
	return NULL;
    }
    if (objClass == CKO_CERTIFICATE && obj->objectInfo) {
	return (NSSLOWCERTCertificate *)obj->objectInfo;
    }
    cert = nsslowcert_FindCertByKey(certHandle, &obj->dbKey);
    if (objClass == CKO_CERTIFICATE) {
	obj->objectInfo = (void *)cert;
	obj->infoFree = (LGFreeFunc) nsslowcert_DestroyCertificate ;
    }
    return cert;
}

static NSSLOWCERTTrust *
lg_getTrust(LGObjectCache *obj, NSSLOWCERTCertDBHandle *certHandle)
{
    NSSLOWCERTTrust *trust;

    if (obj->objclass != CKO_NSS_TRUST) {
	return NULL;
    }
    if (obj->objectInfo) {
	return (NSSLOWCERTTrust *)obj->objectInfo;
    }
    trust = nsslowcert_FindTrustByKey(certHandle, &obj->dbKey);
    obj->objectInfo = (void *)trust;
    obj->infoFree = (LGFreeFunc) nsslowcert_DestroyTrust ;
    return trust;
}

static NSSLOWKEYPublicKey *
lg_GetPublicKey(LGObjectCache *obj)
{
    NSSLOWKEYPublicKey *pubKey;
    NSSLOWKEYPrivateKey *privKey;

    if (obj->objclass != CKO_PUBLIC_KEY) {
	return NULL;
    }
    if (obj->objectInfo) {
	return (NSSLOWKEYPublicKey *)obj->objectInfo;
    }
    privKey = lg_FindKeyByPublicKey(obj->sdb, &obj->dbKey);
    if (privKey == NULL) {
	return NULL;
    }
    pubKey = lg_nsslowkey_ConvertToPublicKey(privKey);
    lg_nsslowkey_DestroyPrivateKey(privKey);
    obj->objectInfo = (void *) pubKey;
    obj->infoFree = (LGFreeFunc) lg_nsslowkey_DestroyPublicKey ;
    return pubKey;
}

/*
 * we need two versions of lg_GetPrivateKey. One version that takes the 
 * DB handle so we can pass the handle we have already acquired in,
 *  rather than going through the 'getKeyDB' code again, 
 *  which may fail the second time and another which just aquires
 *  the key handle from the sdb (where we don't already have a key handle.
 * This version does the former.
 */
static NSSLOWKEYPrivateKey *
lg_GetPrivateKeyWithDB(LGObjectCache *obj, NSSLOWKEYDBHandle *keyHandle)
{
    NSSLOWKEYPrivateKey *privKey;

    if ((obj->objclass != CKO_PRIVATE_KEY) && 
			(obj->objclass != CKO_SECRET_KEY)) {
	return NULL;
    }
    if (obj->objectInfo) {
	return (NSSLOWKEYPrivateKey *)obj->objectInfo;
    }
    privKey = nsslowkey_FindKeyByPublicKey(keyHandle, &obj->dbKey, obj->sdb);
    if (privKey == NULL) {
	return NULL;
    }
    obj->objectInfo = (void *) privKey;
    obj->infoFree = (LGFreeFunc) lg_nsslowkey_DestroyPrivateKey ;
    return privKey;
}

/* this version does the latter */
static NSSLOWKEYPrivateKey *
lg_GetPrivateKey(LGObjectCache *obj)
{
    NSSLOWKEYDBHandle *keyHandle;
    NSSLOWKEYPrivateKey *privKey;

    keyHandle = lg_getKeyDB(obj->sdb);
    if (!keyHandle) {
	return NULL;
    }
    privKey = lg_GetPrivateKeyWithDB(obj, keyHandle);
    return privKey;
}

/* lg_GetPubItem returns data associated with the public key.
 * one only needs to free the public key. This comment is here
 * because this sematic would be non-obvious otherwise. All callers
 * should include this comment.
 */
static SECItem *
lg_GetPubItem(NSSLOWKEYPublicKey *pubKey) {
    SECItem *pubItem = NULL;
    /* get value to compare from the cert's public key */
    switch ( pubKey->keyType ) {
    case NSSLOWKEYRSAKey:
	    pubItem = &pubKey->u.rsa.modulus;
	    break;
    case NSSLOWKEYDSAKey:
	    pubItem = &pubKey->u.dsa.publicValue;
	    break;
    case NSSLOWKEYDHKey:
	    pubItem = &pubKey->u.dh.publicValue;
	    break;
#ifndef NSS_DISABLE_ECC
    case NSSLOWKEYECKey:
	    pubItem = &pubKey->u.ec.publicValue;
	    break;
#endif /* NSS_DISABLE_ECC */
    default:
	    break;
    }
    return pubItem;
}

static CK_RV
lg_FindRSAPublicKeyAttribute(NSSLOWKEYPublicKey *key, CK_ATTRIBUTE_TYPE type,
				CK_ATTRIBUTE *attribute)
{
    unsigned char hash[SHA1_LENGTH];
    CK_KEY_TYPE keyType = CKK_RSA;

    switch (type) {
    case CKA_KEY_TYPE:
	return lg_ULongAttribute(attribute, type, keyType);
    case CKA_ID:
	SHA1_HashBuf(hash,key->u.rsa.modulus.data,key->u.rsa.modulus.len);
	return lg_CopyAttribute(attribute,type,hash,SHA1_LENGTH);
    case CKA_DERIVE:
	return LG_CLONE_ATTR(attribute,type,lg_StaticFalseAttr);
    case CKA_ENCRYPT:
    case CKA_VERIFY:
    case CKA_VERIFY_RECOVER:
    case CKA_WRAP:
	return LG_CLONE_ATTR(attribute,type,lg_StaticTrueAttr);
    case CKA_MODULUS:
	return lg_CopyAttributeSigned(attribute,type,key->u.rsa.modulus.data,
					key->u.rsa.modulus.len);
    case CKA_PUBLIC_EXPONENT:
	return lg_CopyAttributeSigned(attribute, type,
				key->u.rsa.publicExponent.data,
				key->u.rsa.publicExponent.len);
    default:
	break;
    }
    return lg_invalidAttribute(attribute);
}

static CK_RV
lg_FindDSAPublicKeyAttribute(NSSLOWKEYPublicKey *key, CK_ATTRIBUTE_TYPE type,
				CK_ATTRIBUTE *attribute)
{
    unsigned char hash[SHA1_LENGTH];
    CK_KEY_TYPE keyType = CKK_DSA;

    switch (type) {
    case CKA_KEY_TYPE:
	return lg_ULongAttribute(attribute, type, keyType);
    case CKA_ID:
	SHA1_HashBuf(hash,key->u.dsa.publicValue.data,
						key->u.dsa.publicValue.len);
	return lg_CopyAttribute(attribute,type,hash,SHA1_LENGTH);
    case CKA_DERIVE:
    case CKA_ENCRYPT:
    case CKA_VERIFY_RECOVER:
    case CKA_WRAP:
	return LG_CLONE_ATTR(attribute,type,lg_StaticFalseAttr);
    case CKA_VERIFY:
	return LG_CLONE_ATTR(attribute,type,lg_StaticTrueAttr);
    case CKA_VALUE:
	return lg_CopyAttributeSigned(attribute,type,
					key->u.dsa.publicValue.data,
					key->u.dsa.publicValue.len);
    case CKA_PRIME:
	return lg_CopyAttributeSigned(attribute,type,
					key->u.dsa.params.prime.data,
					key->u.dsa.params.prime.len);
    case CKA_SUBPRIME:
	return lg_CopyAttributeSigned(attribute,type,
				key->u.dsa.params.subPrime.data,
				key->u.dsa.params.subPrime.len);
    case CKA_BASE:
	return lg_CopyAttributeSigned(attribute,type,
					key->u.dsa.params.base.data,
					key->u.dsa.params.base.len);
    default:
	break;
    }
    return lg_invalidAttribute(attribute);
}

static CK_RV
lg_FindDHPublicKeyAttribute(NSSLOWKEYPublicKey *key, CK_ATTRIBUTE_TYPE type,
				CK_ATTRIBUTE *attribute)
{
    unsigned char hash[SHA1_LENGTH];
    CK_KEY_TYPE keyType = CKK_DH;

    switch (type) {
    case CKA_KEY_TYPE:
	return lg_ULongAttribute(attribute, type, keyType);
    case CKA_ID:
	SHA1_HashBuf(hash,key->u.dh.publicValue.data,key->u.dh.publicValue.len);
	return lg_CopyAttribute(attribute,type,hash,SHA1_LENGTH);
    case CKA_DERIVE:
	return LG_CLONE_ATTR(attribute,type,lg_StaticTrueAttr);
    case CKA_ENCRYPT:
    case CKA_VERIFY:
    case CKA_VERIFY_RECOVER:
    case CKA_WRAP:
	return LG_CLONE_ATTR(attribute,type,lg_StaticFalseAttr);
    case CKA_VALUE:
	return lg_CopyAttributeSigned(attribute,type,
					key->u.dh.publicValue.data,
					key->u.dh.publicValue.len);
    case CKA_PRIME:
	return lg_CopyAttributeSigned(attribute,type,key->u.dh.prime.data,
					key->u.dh.prime.len);
    case CKA_BASE:
	return lg_CopyAttributeSigned(attribute,type,key->u.dh.base.data,
					key->u.dh.base.len);
    default:
	break;
    }
    return lg_invalidAttribute(attribute);
}

#ifndef NSS_DISABLE_ECC
static CK_RV
lg_FindECPublicKeyAttribute(NSSLOWKEYPublicKey *key, CK_ATTRIBUTE_TYPE type,
				CK_ATTRIBUTE *attribute)
{
    unsigned char hash[SHA1_LENGTH];
    CK_KEY_TYPE keyType = CKK_EC;

    switch (type) {
    case CKA_KEY_TYPE:
	return lg_ULongAttribute(attribute, type, keyType);
    case CKA_ID:
	SHA1_HashBuf(hash, key->u.ec.publicValue.data,
		     key->u.ec.publicValue.len);
	return lg_CopyAttribute(attribute,type,hash,SHA1_LENGTH);
    case CKA_DERIVE:
    case CKA_VERIFY:
	return LG_CLONE_ATTR(attribute,type,lg_StaticTrueAttr);
    case CKA_ENCRYPT:
    case CKA_VERIFY_RECOVER:
    case CKA_WRAP:
	return LG_CLONE_ATTR(attribute,type,lg_StaticFalseAttr);
    case CKA_EC_PARAMS:
	return lg_CopyAttributeSigned(attribute,type,
					key->u.ec.ecParams.DEREncoding.data,
					key->u.ec.ecParams.DEREncoding.len);
    case CKA_EC_POINT:
	if (PR_GetEnvSecure("NSS_USE_DECODED_CKA_EC_POINT")) {
	    return lg_CopyAttributeSigned(attribute, type,
					key->u.ec.publicValue.data,
					key->u.ec.publicValue.len);
	} else {
	    SECItem *pubValue = SEC_ASN1EncodeItem(NULL, NULL, 
					&(key->u.ec.publicValue), 
					SEC_ASN1_GET(SEC_OctetStringTemplate));
	    CK_RV crv;
	    if (!pubValue) {
		return CKR_HOST_MEMORY;
	    }
	    crv = lg_CopyAttributeSigned(attribute, type,
					pubValue->data,
					pubValue->len);
	    SECITEM_FreeItem(pubValue, PR_TRUE);
	    return crv;
	}
    default:
	break;
    }
    return lg_invalidAttribute(attribute);
}
#endif /* NSS_DISABLE_ECC */


static CK_RV
lg_FindPublicKeyAttribute(LGObjectCache *obj, CK_ATTRIBUTE_TYPE type,
				CK_ATTRIBUTE *attribute)
{
    NSSLOWKEYPublicKey   *key;
    CK_RV crv;
    char *label;

    switch (type) {
    case CKA_PRIVATE:
    case CKA_SENSITIVE:
    case CKA_ALWAYS_SENSITIVE:
    case CKA_NEVER_EXTRACTABLE:
	return LG_CLONE_ATTR(attribute,type,lg_StaticFalseAttr);
    case CKA_MODIFIABLE:
    case CKA_EXTRACTABLE:
	return LG_CLONE_ATTR(attribute,type,lg_StaticTrueAttr);
    case CKA_SUBJECT:
	   return LG_CLONE_ATTR(attribute,type,lg_StaticNullAttr);
    case CKA_START_DATE:
    case CKA_END_DATE:
	   return LG_CLONE_ATTR(attribute,type,lg_StaticNullAttr);
    case CKA_LABEL:
        label = lg_FindKeyNicknameByPublicKey(obj->sdb, &obj->dbKey);
	if (label == NULL) {
	   return LG_CLONE_ATTR(attribute,type,lg_StaticNullAttr);
	}
	crv = lg_CopyAttribute(attribute,type,label,PORT_Strlen(label));
	PORT_Free(label);
	return crv;
    default:
	break;
    }

    key = lg_GetPublicKey(obj);
    if (key == NULL) {
	if (type == CKA_ID) {
	   return LG_CLONE_ATTR(attribute,type,lg_StaticNullAttr);
	}
	return CKR_OBJECT_HANDLE_INVALID;
    }

    switch (key->keyType) {
    case NSSLOWKEYRSAKey:
	return lg_FindRSAPublicKeyAttribute(key,type,attribute);
    case NSSLOWKEYDSAKey:
	return lg_FindDSAPublicKeyAttribute(key,type,attribute);
    case NSSLOWKEYDHKey:
	return lg_FindDHPublicKeyAttribute(key,type,attribute);
#ifndef NSS_DISABLE_ECC
    case NSSLOWKEYECKey:
	return lg_FindECPublicKeyAttribute(key,type,attribute);
#endif /* NSS_DISABLE_ECC */
    default:
	break;
    }

    return lg_invalidAttribute(attribute);
}

static CK_RV
lg_FindSecretKeyAttribute(LGObjectCache *obj, CK_ATTRIBUTE_TYPE type,
				CK_ATTRIBUTE *attribute)
{
    NSSLOWKEYPrivateKey  *key;
    char *label;
    unsigned char *keyString;
    CK_RV crv;
    int keyTypeLen;
    CK_ULONG keyLen;
    CK_KEY_TYPE keyType;
    PRUint32 keyTypeStorage;

    switch (type) {
    case CKA_PRIVATE:
    case CKA_SENSITIVE:
    case CKA_ALWAYS_SENSITIVE:
    case CKA_EXTRACTABLE:
    case CKA_DERIVE:
    case CKA_ENCRYPT:
    case CKA_DECRYPT:
    case CKA_SIGN:
    case CKA_VERIFY:
    case CKA_WRAP:
    case CKA_UNWRAP:
    case CKA_MODIFIABLE:
    case CKA_LOCAL:
	return LG_CLONE_ATTR(attribute,type,lg_StaticTrueAttr);
    case CKA_NEVER_EXTRACTABLE:
	return LG_CLONE_ATTR(attribute,type,lg_StaticFalseAttr);
    case CKA_START_DATE:
    case CKA_END_DATE:
	   return LG_CLONE_ATTR(attribute,type,lg_StaticNullAttr);
    case CKA_LABEL:
        label = lg_FindKeyNicknameByPublicKey(obj->sdb, &obj->dbKey);
	if (label == NULL) {
	   return LG_CLONE_ATTR(attribute,type,lg_StaticNullAttr);
	}
	crv = lg_CopyAttribute(attribute,type,label,PORT_Strlen(label));
	PORT_Free(label);
	return crv;
    case CKA_ID:
	return lg_CopyAttribute(attribute,type,obj->dbKey.data,
						obj->dbKey.len);
    case CKA_KEY_TYPE:
    case CKA_VALUE_LEN:
    case CKA_VALUE:
	break;
    default:
	return lg_invalidAttribute(attribute);
    }

    key = lg_GetPrivateKey(obj);
    if (key == NULL) {
	return CKR_OBJECT_HANDLE_INVALID;
    }
    switch (type) {
    case CKA_KEY_TYPE:
	/* handle legacy databases. In legacy databases key_type was stored
	 * in host order, with any leading zeros stripped off. Only key types
	 * under 0x1f (AES) were stored. We assume that any values which are
	 * either 1 byte long (big endian), or have byte[0] between 0 and 
	 * 0x7f and bytes[1]-bytes[3] equal to '0' (little endian). All other
	 * values are assumed to be from the new database, which is always 4
	 * bytes in network order */
	keyType=0;
	keyString = key->u.rsa.coefficient.data;
	keyTypeLen = key->u.rsa.coefficient.len;


	/*
 	 * Because of various endian and word lengths The database may have
	 * stored the keyType value in one of the following formats:
	 *   (kt) <= 0x1f 
	 *                                   length data
	 * Big Endian,     pre-3.9, all lengths: 1  (kt)
	 * Little Endian,  pre-3.9, 32 bits:     4  (kt) 0  0  0
	 * Little Endian,  pre-3.9, 64 bits:     8  (kt) 0  0  0   0  0  0  0
	 * All platforms,      3.9, 32 bits:     4    0  0  0 (kt)
	 * Big Endian,         3.9, 64 bits:     8    0  0  0 (kt) 0  0  0  0
	 * Little  Endian,     3.9, 64 bits:     8    0  0  0  0   0  0  0 (kt)
	 * All platforms, >= 3.9.1, all lengths: 4   (a) k1 k2 k3
	 * where (a) is 0 or >= 0x80. currently (a) can only be 0.
	 */
	/*
 	 * this key was written on a 64 bit platform with a using NSS 3.9
	 * or earlier. Reduce the 64 bit possibilities above. When we are
	 * through, we will only have:
	 * 
	 * Big Endian,     pre-3.9, all lengths: 1  (kt)
	 * Little Endian,  pre-3.9, all lengths: 4  (kt) 0  0  0
	 * All platforms,      3.9, all lengths: 4    0  0  0 (kt)
	 * All platforms, => 3.9.1, all lengths: 4   (a) k1 k2 k3
	 */
	if (keyTypeLen == 8) {
	    keyTypeStorage = *(PRUint32 *) keyString;
	    if (keyTypeStorage == 0) {
		keyString += sizeof(PRUint32);
	    }
	    keyTypeLen = 4;
	}
	/*
	 * Now Handle:
	 *
	 * All platforms,      3.9, all lengths: 4    0  0  0 (kt)
	 * All platforms, => 3.9.1, all lengths: 4   (a) k1 k2 k3
	 *
	 * NOTE: if  kt == 0 or ak1k2k3 == 0, the test fails and
	 * we handle it as:
	 *
	 * Little Endian,  pre-3.9, all lengths: 4  (kt) 0  0  0
	 */
	if (keyTypeLen == sizeof(keyTypeStorage) &&
	     (((keyString[0] & 0x80) == 0x80) ||
		!((keyString[1] == 0) && (keyString[2] == 0)
	   				    && (keyString[3] == 0))) ) {
	    PORT_Memcpy(&keyTypeStorage, keyString, sizeof(keyTypeStorage));
	    keyType = (CK_KEY_TYPE) PR_ntohl(keyTypeStorage);
	} else {
	/*
	 * Now Handle:
	 *
	 * Big Endian,     pre-3.9, all lengths: 1  (kt)
	 * Little Endian,  pre-3.9, all lengths: 4  (kt) 0  0  0
	 *  -- KeyType == 0 all other cases ---: 4    0  0  0  0
	 */
	    keyType = (CK_KEY_TYPE) keyString[0] ;
        }
	return lg_ULongAttribute(attribute, type, keyType);
    case CKA_VALUE:
	return lg_CopyPrivAttribute(attribute,type,key->u.rsa.privateExponent.data,
				key->u.rsa.privateExponent.len, obj->sdb);
    case CKA_VALUE_LEN:
	keyLen=key->u.rsa.privateExponent.len;
	return lg_ULongAttribute(attribute,type, keyLen);
    }
    return lg_invalidAttribute(attribute);
}

static CK_RV
lg_FindRSAPrivateKeyAttribute(NSSLOWKEYPrivateKey *key, CK_ATTRIBUTE_TYPE type,
				CK_ATTRIBUTE *attribute, SDB *sdbpw)
{
    unsigned char hash[SHA1_LENGTH];
    CK_KEY_TYPE keyType = CKK_RSA;

    switch (type) {
    case CKA_KEY_TYPE:
	return lg_ULongAttribute(attribute, type, keyType);
    case CKA_ID:
	SHA1_HashBuf(hash,key->u.rsa.modulus.data,key->u.rsa.modulus.len);
	return lg_CopyAttribute(attribute,type,hash,SHA1_LENGTH);
    case CKA_DERIVE:
	return LG_CLONE_ATTR(attribute,type,lg_StaticFalseAttr);
    case CKA_DECRYPT:
    case CKA_SIGN:
    case CKA_SIGN_RECOVER:
    case CKA_UNWRAP:
	return LG_CLONE_ATTR(attribute, type,lg_StaticTrueAttr);
    case CKA_MODULUS:
	return lg_CopyAttributeSigned(attribute,type,key->u.rsa.modulus.data,
					key->u.rsa.modulus.len);
    case CKA_PUBLIC_EXPONENT:
	return lg_CopyAttributeSigned(attribute, type,
				key->u.rsa.publicExponent.data,
				key->u.rsa.publicExponent.len);
    case CKA_PRIVATE_EXPONENT:
	return lg_CopyPrivAttrSigned(attribute,type,
				key->u.rsa.privateExponent.data,
				key->u.rsa.privateExponent.len, sdbpw);
    case CKA_PRIME_1:
	return lg_CopyPrivAttrSigned(attribute, type, key->u.rsa.prime1.data,
				key->u.rsa.prime1.len, sdbpw);
    case CKA_PRIME_2:
	return lg_CopyPrivAttrSigned(attribute, type, key->u.rsa.prime2.data,
				key->u.rsa.prime2.len, sdbpw);
    case CKA_EXPONENT_1:
	return lg_CopyPrivAttrSigned(attribute, type, 
				key->u.rsa.exponent1.data,
				key->u.rsa.exponent1.len, sdbpw);
    case CKA_EXPONENT_2:
	return lg_CopyPrivAttrSigned(attribute, type, 
				key->u.rsa.exponent2.data,
				key->u.rsa.exponent2.len, sdbpw);
    case CKA_COEFFICIENT:
	return lg_CopyPrivAttrSigned(attribute, type, 
				key->u.rsa.coefficient.data,
				key->u.rsa.coefficient.len, sdbpw);
    default:
	break;
    }
    return lg_invalidAttribute(attribute);
}

static CK_RV
lg_FindDSAPrivateKeyAttribute(NSSLOWKEYPrivateKey *key, CK_ATTRIBUTE_TYPE type,
				CK_ATTRIBUTE *attribute, SDB *sdbpw)
{
    unsigned char hash[SHA1_LENGTH];
    CK_KEY_TYPE keyType = CKK_DSA;

    switch (type) {
    case CKA_KEY_TYPE:
	return lg_ULongAttribute(attribute, type, keyType);
    case CKA_ID:
	SHA1_HashBuf(hash,key->u.dsa.publicValue.data,
			  key->u.dsa.publicValue.len);
	return lg_CopyAttribute(attribute,type,hash,SHA1_LENGTH);
    case CKA_DERIVE:
    case CKA_DECRYPT:
    case CKA_SIGN_RECOVER:
    case CKA_UNWRAP:
	return LG_CLONE_ATTR(attribute,type,lg_StaticFalseAttr);
    case CKA_SIGN:
	return LG_CLONE_ATTR(attribute,type,lg_StaticTrueAttr);
    case CKA_VALUE:
	return lg_CopyPrivAttrSigned(attribute, type,
				key->u.dsa.privateValue.data,
				key->u.dsa.privateValue.len, sdbpw);
    case CKA_PRIME:
	return lg_CopyAttributeSigned(attribute, type,
					key->u.dsa.params.prime.data,
					key->u.dsa.params.prime.len);
    case CKA_SUBPRIME:
	return lg_CopyAttributeSigned(attribute, type,
				key->u.dsa.params.subPrime.data,
				key->u.dsa.params.subPrime.len);
    case CKA_BASE:
	return lg_CopyAttributeSigned(attribute, type,
					key->u.dsa.params.base.data,
					key->u.dsa.params.base.len);
    case CKA_NETSCAPE_DB:
	return lg_CopyAttributeSigned(attribute, type,
					key->u.dsa.publicValue.data,
					key->u.dsa.publicValue.len);
    default:
	break;
    }
    return lg_invalidAttribute(attribute);
}

static CK_RV
lg_FindDHPrivateKeyAttribute(NSSLOWKEYPrivateKey *key, CK_ATTRIBUTE_TYPE type,
				CK_ATTRIBUTE *attribute, SDB *sdbpw)
{
    unsigned char hash[SHA1_LENGTH];
    CK_KEY_TYPE keyType = CKK_DH;

    switch (type) {
    case CKA_KEY_TYPE:
	return lg_ULongAttribute(attribute, type, keyType);
    case CKA_ID:
	SHA1_HashBuf(hash,key->u.dh.publicValue.data,key->u.dh.publicValue.len);
	return lg_CopyAttribute(attribute,type,hash,SHA1_LENGTH);
    case CKA_DERIVE:
	return LG_CLONE_ATTR(attribute,type,lg_StaticTrueAttr);
    case CKA_DECRYPT:
    case CKA_SIGN:
    case CKA_SIGN_RECOVER:
    case CKA_UNWRAP:
	return LG_CLONE_ATTR(attribute,type,lg_StaticFalseAttr);
    case CKA_VALUE:
	return lg_CopyPrivAttrSigned(attribute, type,
					key->u.dh.privateValue.data,
					key->u.dh.privateValue.len, sdbpw);
    case CKA_PRIME:
	return lg_CopyAttributeSigned(attribute, type, key->u.dh.prime.data,
					key->u.dh.prime.len);
    case CKA_BASE:
	return lg_CopyAttributeSigned(attribute, type, key->u.dh.base.data,
					key->u.dh.base.len);
    case CKA_NETSCAPE_DB:
	return lg_CopyAttributeSigned(attribute, type,
					key->u.dh.publicValue.data,
					key->u.dh.publicValue.len);
    default:
	break;
    }
    return lg_invalidAttribute(attribute);
}

#ifndef NSS_DISABLE_ECC
static CK_RV
lg_FindECPrivateKeyAttribute(NSSLOWKEYPrivateKey *key, CK_ATTRIBUTE_TYPE type,
				CK_ATTRIBUTE *attribute, SDB *sdbpw)
{
    unsigned char hash[SHA1_LENGTH];
    CK_KEY_TYPE keyType = CKK_EC;

    switch (type) {
    case CKA_KEY_TYPE:
	return lg_ULongAttribute(attribute, type, keyType);
    case CKA_ID:
	SHA1_HashBuf(hash,key->u.ec.publicValue.data,key->u.ec.publicValue.len);
	return lg_CopyAttribute(attribute,type,hash,SHA1_LENGTH);
    case CKA_DERIVE:
    case CKA_SIGN:
	return LG_CLONE_ATTR(attribute,type,lg_StaticTrueAttr);
    case CKA_DECRYPT:
    case CKA_SIGN_RECOVER:
    case CKA_UNWRAP:
	return LG_CLONE_ATTR(attribute,type,lg_StaticFalseAttr);
    case CKA_VALUE:
	return lg_CopyPrivAttrSigned(attribute, type,
					key->u.ec.privateValue.data,
					key->u.ec.privateValue.len, sdbpw);
    case CKA_EC_PARAMS:
	return lg_CopyAttributeSigned(attribute, type,
					key->u.ec.ecParams.DEREncoding.data,
					key->u.ec.ecParams.DEREncoding.len);
    case CKA_NETSCAPE_DB:
	return lg_CopyAttributeSigned(attribute, type,
					key->u.ec.publicValue.data,
					key->u.ec.publicValue.len);
    default:
	break;
    }
    return lg_invalidAttribute(attribute);
}
#endif /* NSS_DISABLE_ECC */

static CK_RV
lg_FindPrivateKeyAttribute(LGObjectCache *obj, CK_ATTRIBUTE_TYPE type,
				CK_ATTRIBUTE *attribute)
{
    NSSLOWKEYPrivateKey  *key;
    char *label;
    CK_RV crv;

    switch (type) {
    case CKA_PRIVATE:
    case CKA_SENSITIVE:
    case CKA_ALWAYS_SENSITIVE:
    case CKA_EXTRACTABLE:
    case CKA_MODIFIABLE:
    case CKA_LOCAL:
	return LG_CLONE_ATTR(attribute,type,lg_StaticTrueAttr);
    case CKA_NEVER_EXTRACTABLE:
	return LG_CLONE_ATTR(attribute,type,lg_StaticFalseAttr);
    case CKA_SUBJECT:
	   return LG_CLONE_ATTR(attribute,type,lg_StaticNullAttr);
    case CKA_START_DATE:
    case CKA_END_DATE:
	   return LG_CLONE_ATTR(attribute,type,lg_StaticNullAttr);
    case CKA_LABEL:
        label = lg_FindKeyNicknameByPublicKey(obj->sdb, &obj->dbKey);
	if (label == NULL) {
	   return LG_CLONE_ATTR(attribute,type,lg_StaticNullAttr);
	}
	crv = lg_CopyAttribute(attribute,type,label,PORT_Strlen(label));
	PORT_Free(label);
	return crv;
    default:
	break;
    }
    key = lg_GetPrivateKey(obj);
    if (key == NULL) {
	return CKR_OBJECT_HANDLE_INVALID;
    }
    switch (key->keyType) {
    case NSSLOWKEYRSAKey:
	return lg_FindRSAPrivateKeyAttribute(key,type,attribute,obj->sdb);
    case NSSLOWKEYDSAKey:
	return lg_FindDSAPrivateKeyAttribute(key,type,attribute,obj->sdb);
    case NSSLOWKEYDHKey:
	return lg_FindDHPrivateKeyAttribute(key,type,attribute,obj->sdb);
#ifndef NSS_DISABLE_ECC
    case NSSLOWKEYECKey:
	return lg_FindECPrivateKeyAttribute(key,type,attribute,obj->sdb);
#endif /* NSS_DISABLE_ECC */
    default:
	break;
    }

    return lg_invalidAttribute(attribute);
}

static CK_RV
lg_FindSMIMEAttribute(LGObjectCache *obj, CK_ATTRIBUTE_TYPE type,
				CK_ATTRIBUTE *attribute)
{
    certDBEntrySMime *entry;
    switch (type) {
    case CKA_PRIVATE:
    case CKA_MODIFIABLE:
	return LG_CLONE_ATTR(attribute,type,lg_StaticFalseAttr);
    case CKA_NSS_EMAIL:
	return lg_CopyAttribute(attribute,type,obj->dbKey.data,
						obj->dbKey.len-1);
    case CKA_NSS_SMIME_TIMESTAMP:
    case CKA_SUBJECT:
    case CKA_VALUE:
	break;
    default:
	return lg_invalidAttribute(attribute);
    }
    entry = lg_getSMime(obj);
    if (entry == NULL) {
	return CKR_OBJECT_HANDLE_INVALID;
    }
    switch (type) {
    case CKA_NSS_SMIME_TIMESTAMP:
	return lg_CopyAttribute(attribute,type,entry->optionsDate.data,
					entry->optionsDate.len);
    case CKA_SUBJECT:
	return lg_CopyAttribute(attribute,type,entry->subjectName.data,
					entry->subjectName.len);
    case CKA_VALUE:
	return lg_CopyAttribute(attribute,type,entry->smimeOptions.data,
					entry->smimeOptions.len);
    default:
	break;
    }
    return lg_invalidAttribute(attribute);
}

static CK_RV
lg_FindTrustAttribute(LGObjectCache *obj, CK_ATTRIBUTE_TYPE type,
				CK_ATTRIBUTE *attribute)
{
    NSSLOWCERTTrust *trust;
    NSSLOWCERTCertDBHandle *certHandle;
    NSSLOWCERTCertificate *cert;
    unsigned char hash[SHA1_LENGTH];
    unsigned int trustFlags;
    CK_RV crv;

    switch (type) {
    case CKA_PRIVATE:
	return LG_CLONE_ATTR(attribute,type,lg_StaticFalseAttr);
    case CKA_MODIFIABLE:
	return LG_CLONE_ATTR(attribute,type,lg_StaticTrueAttr);
    case CKA_CERT_SHA1_HASH:
    case CKA_CERT_MD5_HASH:
    case CKA_TRUST_CLIENT_AUTH:
    case CKA_TRUST_SERVER_AUTH:
    case CKA_TRUST_EMAIL_PROTECTION:
    case CKA_TRUST_CODE_SIGNING:
    case CKA_TRUST_STEP_UP_APPROVED:
    case CKA_ISSUER:
    case CKA_SERIAL_NUMBER:
	break;
    default:
        return lg_invalidAttribute(attribute);
    }
    certHandle = lg_getCertDB(obj->sdb);
    if (!certHandle) {
	return CKR_OBJECT_HANDLE_INVALID;
    }
    trust = lg_getTrust(obj, certHandle);
    if (trust == NULL) {
	return CKR_OBJECT_HANDLE_INVALID;
    }
    switch (type) {
    case CKA_CERT_SHA1_HASH:
	SHA1_HashBuf(hash,trust->derCert->data,trust->derCert->len);
	return lg_CopyAttribute(attribute, type, hash, SHA1_LENGTH);
    case CKA_CERT_MD5_HASH:
	MD5_HashBuf(hash,trust->derCert->data,trust->derCert->len);
	return lg_CopyAttribute(attribute, type, hash, MD5_LENGTH);
    case CKA_TRUST_CLIENT_AUTH:
	trustFlags = trust->trust->sslFlags & CERTDB_TRUSTED_CLIENT_CA ?
		trust->trust->sslFlags | CERTDB_TRUSTED_CA : 0 ;
	goto trust;
    case CKA_TRUST_SERVER_AUTH:
	trustFlags = trust->trust->sslFlags;
	goto trust;
    case CKA_TRUST_EMAIL_PROTECTION:
	trustFlags = trust->trust->emailFlags;
	goto trust;
    case CKA_TRUST_CODE_SIGNING:
	trustFlags = trust->trust->objectSigningFlags;
trust:
	if (trustFlags & CERTDB_TRUSTED_CA ) {
	    return lg_ULongAttribute(attribute, type,
				     CKT_NSS_TRUSTED_DELEGATOR);
	}
	if (trustFlags & CERTDB_TRUSTED) {
	    return lg_ULongAttribute(attribute, type, CKT_NSS_TRUSTED);
	}
	if (trustFlags & CERTDB_MUST_VERIFY) {
	    return lg_ULongAttribute(attribute, type, 
				     CKT_NSS_MUST_VERIFY_TRUST);
	}
	if (trustFlags & CERTDB_TRUSTED_UNKNOWN) {
	    return lg_ULongAttribute(attribute, type, CKT_NSS_TRUST_UNKNOWN);
	}
	if (trustFlags & CERTDB_VALID_CA) {
	    return lg_ULongAttribute(attribute, type, CKT_NSS_VALID_DELEGATOR);
	}
	if (trustFlags & CERTDB_TERMINAL_RECORD) {
	    return lg_ULongAttribute(attribute, type, CKT_NSS_NOT_TRUSTED);
	}
	return lg_ULongAttribute(attribute, type, CKT_NSS_TRUST_UNKNOWN);
    case CKA_TRUST_STEP_UP_APPROVED:
	if (trust->trust->sslFlags & CERTDB_GOVT_APPROVED_CA) {
	    return LG_CLONE_ATTR(attribute,type,lg_StaticTrueAttr);
	} else {
	    return LG_CLONE_ATTR(attribute,type,lg_StaticFalseAttr);
	}
    default:
	break;
    }


    switch (type) {
    case CKA_ISSUER:
	cert = lg_getCert(obj, certHandle);
	if (cert == NULL) break;
	crv = lg_CopyAttribute(attribute,type,cert->derIssuer.data,
						cert->derIssuer.len);
	break;
    case CKA_SERIAL_NUMBER:
	cert = lg_getCert(obj, certHandle);
	if (cert == NULL) break;
	crv =  lg_CopyAttribute(attribute,type,cert->derSN.data,
						cert->derSN.len);
	break;
    default:
	cert = NULL;
	break;
    }
    if (cert) {
	nsslowcert_DestroyCertificate(cert);
	return crv;
    }
    return lg_invalidAttribute(attribute);
}

static CK_RV
lg_FindCrlAttribute(LGObjectCache *obj, CK_ATTRIBUTE_TYPE type,
				CK_ATTRIBUTE *attribute)
{
    certDBEntryRevocation *crl;

    switch (type) {
    case CKA_PRIVATE:
    case CKA_MODIFIABLE:
	return LG_CLONE_ATTR(attribute,type,lg_StaticFalseAttr);
    case CKA_NSS_KRL:
	return ((obj->handle == LG_TOKEN_KRL_HANDLE) 
		? LG_CLONE_ATTR(attribute,type,lg_StaticTrueAttr)
		: LG_CLONE_ATTR(attribute,type,lg_StaticFalseAttr));
    case CKA_SUBJECT:
	return lg_CopyAttribute(attribute,type,obj->dbKey.data,
						obj->dbKey.len);
    case CKA_NSS_URL:
    case CKA_VALUE:
	break;
    default:
	return lg_invalidAttribute(attribute);
    }
    crl =  lg_getCrl(obj);
    if (!crl) {
	return CKR_OBJECT_HANDLE_INVALID;
    }
    switch (type) {
    case CKA_NSS_URL:
	if (crl->url == NULL) {
	    return LG_CLONE_ATTR(attribute,type,lg_StaticNullAttr);
	}
	return lg_CopyAttribute(attribute, type, crl->url, 
					PORT_Strlen(crl->url)+1);
    case CKA_VALUE:
	return lg_CopyAttribute(attribute, type, crl->derCrl.data, 
						crl->derCrl.len);
    default:
	break;
    }
    return lg_invalidAttribute(attribute);
}

static CK_RV
lg_FindCertAttribute(LGObjectCache *obj, CK_ATTRIBUTE_TYPE type,
				CK_ATTRIBUTE *attribute)
{
    NSSLOWCERTCertificate  *cert;
    NSSLOWCERTCertDBHandle *certHandle;
    NSSLOWKEYPublicKey     *pubKey;
    unsigned char hash[SHA1_LENGTH];
    SECItem *item;

    switch (type) {
    case CKA_PRIVATE:
	return LG_CLONE_ATTR(attribute,type,lg_StaticFalseAttr);
    case CKA_MODIFIABLE:
	return LG_CLONE_ATTR(attribute,type,lg_StaticTrueAttr);
    case CKA_CERTIFICATE_TYPE:
        /* hardcoding X.509 into here */
        return lg_ULongAttribute(attribute, type, CKC_X_509);
    case CKA_VALUE:
    case CKA_ID:
    case CKA_LABEL:
    case CKA_SUBJECT:
    case CKA_ISSUER:
    case CKA_SERIAL_NUMBER:
    case CKA_NSS_EMAIL:
	break;
    default:
	return lg_invalidAttribute(attribute);
    }

    certHandle = lg_getCertDB(obj->sdb);
    if (certHandle == NULL) {
	return CKR_OBJECT_HANDLE_INVALID;
    }

    cert = lg_getCert(obj, certHandle);
    if (cert == NULL) {
	return CKR_OBJECT_HANDLE_INVALID;
    }
    switch (type) {
    case CKA_VALUE:
	return lg_CopyAttribute(attribute,type,cert->derCert.data,
						cert->derCert.len);
    case CKA_ID:
	if (((cert->trust->sslFlags & CERTDB_USER) == 0) &&
		((cert->trust->emailFlags & CERTDB_USER) == 0) &&
		((cert->trust->objectSigningFlags & CERTDB_USER) == 0)) {
	    return LG_CLONE_ATTR(attribute,type,lg_StaticNullAttr);
	}
	pubKey = nsslowcert_ExtractPublicKey(cert);
	if (pubKey == NULL) break;
	item = lg_GetPubItem(pubKey);
	if (item == NULL) {
	    lg_nsslowkey_DestroyPublicKey(pubKey);
	    break;
	}
	SHA1_HashBuf(hash,item->data,item->len);
	/* item is imbedded in pubKey, just free the key */
	lg_nsslowkey_DestroyPublicKey(pubKey);
	return lg_CopyAttribute(attribute, type, hash, SHA1_LENGTH);
    case CKA_LABEL:
	return cert->nickname 
	       ? lg_CopyAttribute(attribute, type, cert->nickname,
				        PORT_Strlen(cert->nickname))
	       : LG_CLONE_ATTR(attribute,type,lg_StaticNullAttr);
    case CKA_SUBJECT:
	return lg_CopyAttribute(attribute,type,cert->derSubject.data,
						cert->derSubject.len);
    case CKA_ISSUER:
	return lg_CopyAttribute(attribute,type,cert->derIssuer.data,
						cert->derIssuer.len);
    case CKA_SERIAL_NUMBER:
	return lg_CopyAttribute(attribute,type,cert->derSN.data,
						cert->derSN.len);
    case CKA_NSS_EMAIL:
	return (cert->emailAddr && cert->emailAddr[0])
	    ? lg_CopyAttribute(attribute, type, cert->emailAddr,
	                             PORT_Strlen(cert->emailAddr))
	    : LG_CLONE_ATTR(attribute,type,lg_StaticNullAttr);
    default:
	break;
    }
    return lg_invalidAttribute(attribute);
}

CK_RV
lg_GetSingleAttribute(LGObjectCache *obj, CK_ATTRIBUTE *attribute)
{
    /* handle the common ones */
    CK_ATTRIBUTE_TYPE type = attribute->type;
    switch (type) {
    case CKA_CLASS:
	return lg_ULongAttribute(attribute,type,obj->objclass);
    case CKA_TOKEN:
	return LG_CLONE_ATTR(attribute, type,lg_StaticTrueAttr);
    case CKA_LABEL:
	if (  (obj->objclass == CKO_CERTIFICATE) 
	   || (obj->objclass == CKO_PRIVATE_KEY)
	   || (obj->objclass == CKO_PUBLIC_KEY)
	   || (obj->objclass == CKO_SECRET_KEY)) {
	    break;
	}
	return LG_CLONE_ATTR(attribute,type,lg_StaticNullAttr);
    default:
	break;
    }
    switch (obj->objclass) {
    case CKO_CERTIFICATE:
	return lg_FindCertAttribute(obj,type,attribute);
    case CKO_NSS_CRL:
	return lg_FindCrlAttribute(obj,type,attribute);
    case CKO_NSS_TRUST:
	return lg_FindTrustAttribute(obj,type,attribute);
    case CKO_NSS_SMIME:
	return lg_FindSMIMEAttribute(obj,type,attribute);
    case CKO_PUBLIC_KEY:
	return lg_FindPublicKeyAttribute(obj,type,attribute);
    case CKO_PRIVATE_KEY:
	return lg_FindPrivateKeyAttribute(obj,type,attribute);
    case CKO_SECRET_KEY:
	return lg_FindSecretKeyAttribute(obj,type,attribute);
    default:
	break;
    }
    return lg_invalidAttribute(attribute);
} 

/*
 * Fill in the attribute template based on the data in the database.
 */    
CK_RV
lg_GetAttributeValue(SDB *sdb, CK_OBJECT_HANDLE handle, CK_ATTRIBUTE *templ, 
		CK_ULONG count)
{
    LGObjectCache *obj = lg_NewObjectCache(sdb, NULL, handle & ~LG_TOKEN_MASK);
    CK_RV crv, crvCollect = CKR_OK;
    unsigned int i;

    if (obj == NULL) {
	return CKR_OBJECT_HANDLE_INVALID;
    }

    for (i=0; i < count; i++) {
	crv = lg_GetSingleAttribute(obj, &templ[i]);
	if (crvCollect == CKR_OK) crvCollect = crv;
    }

    lg_DestroyObjectCache(obj);
    return crvCollect;
}

PRBool
lg_cmpAttribute(LGObjectCache *obj, const CK_ATTRIBUTE *attribute)
{
    unsigned char buf[LG_BUF_SPACE];
    CK_ATTRIBUTE testAttr;
    unsigned char *tempBuf = NULL;
    PRBool match = PR_TRUE;
    CK_RV crv;

    /* we're going to compare 'attribute' with the actual attribute from
     * the object. We'll use the length of 'attribute' to decide how much
     * space we need to read the test attribute. If 'attribute' doesn't give
     * enough space, then we know the values don't match and that will
     * show up as ckr != CKR_OK */
    testAttr = *attribute;
    testAttr.pValue = buf;

    /* if we don't have enough space, malloc it */
    if (attribute->ulValueLen > LG_BUF_SPACE) {
	tempBuf = PORT_Alloc(attribute->ulValueLen);
	if (!tempBuf) {
	    return PR_FALSE;
	}
	testAttr.pValue = tempBuf;
    }

    /* get the attribute */
    crv = lg_GetSingleAttribute(obj, &testAttr);
    /* if the attribute was read OK, compare it */
    if ((crv != CKR_OK) || (attribute->ulValueLen != testAttr.ulValueLen) ||
     (PORT_Memcmp(attribute->pValue,testAttr.pValue,testAttr.ulValueLen)!= 0)){
	/* something didn't match, this isn't the object we are looking for */
	match = PR_FALSE;
    }
    /* free the buffer we may have allocated */
    if (tempBuf) {
	PORT_Free(tempBuf);
    }
    return match;
}

PRBool
lg_tokenMatch(SDB *sdb, const SECItem *dbKey, CK_OBJECT_HANDLE class,
		const CK_ATTRIBUTE *templ, CK_ULONG count)
{
    PRBool match = PR_TRUE;
    LGObjectCache *obj = lg_NewObjectCache(sdb, dbKey, class);
    unsigned int i;

    if (obj == NULL) {
	return PR_FALSE;
    }

    for (i=0; i < count; i++) {
	match = lg_cmpAttribute(obj, &templ[i]);
	if (!match) {
	   break;
	}
    }

    /* done looking, free up our cache */
    lg_DestroyObjectCache(obj);

    /* if we get through the whole list without finding a mismatched attribute,
     * then this object fits the criteria we are matching */
    return match;
}

static CK_RV
lg_SetCertAttribute(LGObjectCache *obj, CK_ATTRIBUTE_TYPE type, 
					const void *value, unsigned int len)
{
    NSSLOWCERTCertificate  *cert;
    NSSLOWCERTCertDBHandle *certHandle;
    char *nickname = NULL;
    SECStatus rv;
    CK_RV crv;

    /* we can't change  the EMAIL values, but let the
     * upper layers feel better about the fact we tried to set these */
    if (type == CKA_NSS_EMAIL) {
	return CKR_OK;
    }

    certHandle = lg_getCertDB(obj->sdb);
    if (certHandle == NULL) {
	crv = CKR_TOKEN_WRITE_PROTECTED;
	goto done;
    }

    if ((type != CKA_LABEL)  && (type != CKA_ID)) {
	crv = CKR_ATTRIBUTE_READ_ONLY;
	goto done;
    }

    cert = lg_getCert(obj, certHandle);
    if (cert == NULL) {
	crv = CKR_OBJECT_HANDLE_INVALID;
	goto done;
    }

    /* if the app is trying to set CKA_ID, it's probably because it just
     * imported the key. Look to see if we need to set the CERTDB_USER bits.
     */
    if (type == CKA_ID) {
	if (((cert->trust->sslFlags & CERTDB_USER) == 0) &&
		((cert->trust->emailFlags & CERTDB_USER) == 0) &&
		((cert->trust->objectSigningFlags & CERTDB_USER) == 0)) {
	    NSSLOWKEYDBHandle      *keyHandle;

	    keyHandle = lg_getKeyDB(obj->sdb);
	    if (keyHandle) {
		if (nsslowkey_KeyForCertExists(keyHandle, cert)) {
		    NSSLOWCERTCertTrust trust = *cert->trust;
		    trust.sslFlags |= CERTDB_USER;
		    trust.emailFlags |= CERTDB_USER;
		    trust.objectSigningFlags |= CERTDB_USER;
		    nsslowcert_ChangeCertTrust(certHandle,cert,&trust);
		}
	    }
	}
	crv = CKR_OK;
	goto done;
    }

    /* must be CKA_LABEL */
    if (value != NULL) {
	nickname = PORT_ZAlloc(len+1);
	if (nickname == NULL) {
	    crv = CKR_HOST_MEMORY;
	    goto done;
	}
	PORT_Memcpy(nickname,value,len);
	nickname[len] = 0;
    }
    rv = nsslowcert_AddPermNickname(certHandle, cert, nickname);
    crv = (rv == SECSuccess) ? CKR_OK : CKR_DEVICE_ERROR;

done:
    if (nickname) {
	PORT_Free(nickname);
    }
    return crv;
}

static CK_RV
lg_SetPrivateKeyAttribute(LGObjectCache *obj, CK_ATTRIBUTE_TYPE type, 
			const void *value, unsigned int len, 
			PRBool *writePrivate)
{
    NSSLOWKEYPrivateKey *privKey;
    NSSLOWKEYDBHandle   *keyHandle;
    char *nickname = NULL;
    SECStatus rv;
    CK_RV crv;

    /* we can't change the ID and we don't store the subject, but let the
     * upper layers feel better about the fact we tried to set these */
    if ((type == CKA_ID) || (type == CKA_SUBJECT) ||
	(type == CKA_LOCAL) || (type == CKA_NEVER_EXTRACTABLE) ||
	(type == CKA_ALWAYS_SENSITIVE)) {
	return CKR_OK;
    }

    keyHandle = lg_getKeyDB(obj->sdb);
    if (keyHandle == NULL) {
	crv = CKR_TOKEN_WRITE_PROTECTED;
	goto done;
    }

    privKey = lg_GetPrivateKeyWithDB(obj, keyHandle);
    if (privKey == NULL) {
	crv = CKR_OBJECT_HANDLE_INVALID;
	goto done;
    }

    crv = CKR_ATTRIBUTE_READ_ONLY;
    switch(type) {
    case CKA_LABEL:
	if (value != NULL) {
	    nickname = PORT_ZAlloc(len+1);
	    if (nickname == NULL) {
		crv = CKR_HOST_MEMORY;
		goto done;
	    }
	    PORT_Memcpy(nickname,value,len);
	    nickname[len] = 0;
	}
	rv = nsslowkey_UpdateNickname(keyHandle, privKey, &obj->dbKey, 
					nickname, obj->sdb);
	crv = (rv == SECSuccess) ? CKR_OK :  CKR_DEVICE_ERROR;
	break;
    case CKA_UNWRAP:
    case CKA_SIGN:
    case CKA_DERIVE:
    case CKA_SIGN_RECOVER:
    case CKA_DECRYPT:
	/* ignore attempts to change restrict these.
	 * legacyDB ignore these flags and always presents all of them 
	 * that are valid as true. 
	 * NOTE: We only get here if the current value and the new value do
	 * not match. */
	if (*(char *)value == 0) {
	    crv = CKR_OK;
	}
	break;
    case CKA_VALUE:
    case CKA_PRIVATE_EXPONENT:
    case CKA_PRIME_1:
    case CKA_PRIME_2:
    case CKA_EXPONENT_1:
    case CKA_EXPONENT_2:
    case CKA_COEFFICIENT:
	/* We aren't really changing these values, we are just triggering
	 * the database to update it's entry */
	*writePrivate = PR_TRUE;
	crv = CKR_OK;
	break;
    default:
	crv = CKR_ATTRIBUTE_READ_ONLY;
	break;
    }
done:
    if (nickname) {
	PORT_Free(nickname);
    }
    return crv;
}

static CK_RV
lg_SetPublicKeyAttribute(LGObjectCache *obj, CK_ATTRIBUTE_TYPE type, 
			const void *value, unsigned int len, 
			PRBool *writePrivate)
{
    /* we can't change the ID and we don't store the subject, but let the
     * upper layers feel better about the fact we tried to set these */
    if ((type == CKA_ID) || (type == CKA_SUBJECT) || (type == CKA_LABEL)) {
	return CKR_OK;
    }
    return  CKR_ATTRIBUTE_READ_ONLY;
}

static CK_RV
lg_SetTrustAttribute(LGObjectCache *obj, const CK_ATTRIBUTE *attr)
{
    unsigned int flags;
    CK_TRUST  trust;
    NSSLOWCERTCertificate  *cert;
    NSSLOWCERTCertDBHandle *certHandle;
    NSSLOWCERTCertTrust    dbTrust;
    SECStatus rv;
    CK_RV crv;

    if (attr->type == CKA_LABEL) {
	return CKR_OK;
    }

    crv = lg_GetULongAttribute(attr->type, attr, 1, &trust);
    if (crv != CKR_OK) {
	return crv;
    }
    flags = lg_MapTrust(trust, (PRBool) (attr->type == CKA_TRUST_CLIENT_AUTH));

    certHandle = lg_getCertDB(obj->sdb);

    if (certHandle == NULL) {
	crv = CKR_TOKEN_WRITE_PROTECTED;
	goto done;
    }

    cert = lg_getCert(obj, certHandle);
    if (cert == NULL) {
	crv = CKR_OBJECT_HANDLE_INVALID;
	goto done;
    }
    dbTrust = *cert->trust;

    switch (attr->type) {
    case CKA_TRUST_EMAIL_PROTECTION:
	dbTrust.emailFlags = flags |
		(cert->trust->emailFlags & CERTDB_PRESERVE_TRUST_BITS);
	break;
    case CKA_TRUST_CODE_SIGNING:
	dbTrust.objectSigningFlags = flags |
		(cert->trust->objectSigningFlags & CERTDB_PRESERVE_TRUST_BITS);
	break;
    case CKA_TRUST_CLIENT_AUTH:
	dbTrust.sslFlags = flags | (cert->trust->sslFlags & 
				(CERTDB_PRESERVE_TRUST_BITS|CERTDB_TRUSTED_CA));
	break;
    case CKA_TRUST_SERVER_AUTH:
	dbTrust.sslFlags = flags | (cert->trust->sslFlags & 
			(CERTDB_PRESERVE_TRUST_BITS|CERTDB_TRUSTED_CLIENT_CA));
	break;
    default:
	crv = CKR_ATTRIBUTE_READ_ONLY;
	goto done;
    }

    rv = nsslowcert_ChangeCertTrust(certHandle, cert, &dbTrust);
    crv = (rv == SECSuccess) ? CKR_OK : CKR_DEVICE_ERROR;
done:
    return crv;
}

static CK_RV
lg_SetSingleAttribute(LGObjectCache *obj, const CK_ATTRIBUTE *attr, 
		      PRBool *writePrivate)
{
    CK_ATTRIBUTE attribLocal;
    CK_RV crv;

    if ((attr->type == CKA_NETSCAPE_DB) && (obj->objclass == CKO_PRIVATE_KEY)) {
	*writePrivate = PR_TRUE;
	return CKR_OK;
    }

    /* Make sure the attribute exists first */
    attribLocal.type = attr->type;
    attribLocal.pValue = NULL;
    attribLocal.ulValueLen = 0;
    crv = lg_GetSingleAttribute(obj, &attribLocal);
    if (crv != CKR_OK) {
	return crv;
    }

    /* if we are just setting it to the value we already have,
     * allow it to happen. Let label setting go through so
     * we have the opportunity to repair any database corruption. */
    if (attr->type != CKA_LABEL) {
	if (lg_cmpAttribute(obj,attr)) {
	    return CKR_OK;
	}
    }

    crv = CKR_ATTRIBUTE_READ_ONLY;
    switch (obj->objclass) {
    case CKO_CERTIFICATE:
	/* change NICKNAME, EMAIL,  */
	crv = lg_SetCertAttribute(obj,attr->type,
				  attr->pValue,attr->ulValueLen);
	break;
    case CKO_NSS_CRL:
	/* change URL */
	break;
    case CKO_NSS_TRUST:
	crv = lg_SetTrustAttribute(obj,attr);
	break;
    case CKO_PRIVATE_KEY:
    case CKO_SECRET_KEY:
	crv = lg_SetPrivateKeyAttribute(obj,attr->type,
			attr->pValue,attr->ulValueLen, writePrivate);
	break;
    case CKO_PUBLIC_KEY:
	crv = lg_SetPublicKeyAttribute(obj,attr->type,
			attr->pValue,attr->ulValueLen, writePrivate);
	break;
    }
    return crv;
}

/*
 * Fill in the attribute template based on the data in the database.
 */    
CK_RV
lg_SetAttributeValue(SDB *sdb, CK_OBJECT_HANDLE handle, 
			const CK_ATTRIBUTE *templ, CK_ULONG count)
{
    LGObjectCache *obj = lg_NewObjectCache(sdb, NULL, handle & ~LG_TOKEN_MASK);
    CK_RV crv, crvCollect = CKR_OK;
    PRBool writePrivate = PR_FALSE;
    unsigned int i;

    if (obj == NULL) {
	return CKR_OBJECT_HANDLE_INVALID;
    }

    for (i=0; i < count; i++) {
	crv = lg_SetSingleAttribute(obj, &templ[i], &writePrivate);
	if (crvCollect == CKR_OK) crvCollect = crv;
    }

    /* Write any collected changes out for private and secret keys.
     *  don't do the write for just the label */
    if (writePrivate) {
	NSSLOWKEYPrivateKey *privKey = lg_GetPrivateKey(obj);
	SECStatus rv = SECFailure;
	char * label = lg_FindKeyNicknameByPublicKey(obj->sdb, &obj->dbKey);

	if (privKey) {
	    rv = nsslowkey_StoreKeyByPublicKeyAlg(lg_getKeyDB(sdb), privKey, 
		&obj->dbKey, label, sdb, PR_TRUE );
	}
	if (rv != SECSuccess) {
	    crv = CKR_DEVICE_ERROR;
	}
	PORT_Free(label);
    }

    lg_DestroyObjectCache(obj);
    return crvCollect;
}
