/* 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/. */
#include "cryptohi.h"
#include "keyhi.h"
#include "secoid.h"
#include "secitem.h"
#include "secder.h"
#include "base64.h"
#include "secasn1.h"
#include "cert.h"
#include "pk11func.h"
#include "secerr.h"
#include "secdig.h"
#include "prtime.h"
#include "keyi.h"

SEC_ASN1_MKSUB(SECOID_AlgorithmIDTemplate)
SEC_ASN1_MKSUB(SEC_IntegerTemplate)

const SEC_ASN1Template CERT_SubjectPublicKeyInfoTemplate[] = {
    { SEC_ASN1_SEQUENCE,
	  0, NULL, sizeof(CERTSubjectPublicKeyInfo) },
    { SEC_ASN1_INLINE | SEC_ASN1_XTRN,
	  offsetof(CERTSubjectPublicKeyInfo,algorithm),
	  SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
    { SEC_ASN1_BIT_STRING,
	  offsetof(CERTSubjectPublicKeyInfo,subjectPublicKey), },
    { 0, }
};

const SEC_ASN1Template CERT_PublicKeyAndChallengeTemplate[] =
{
    { SEC_ASN1_SEQUENCE, 0, NULL, sizeof(CERTPublicKeyAndChallenge) },
    { SEC_ASN1_ANY, offsetof(CERTPublicKeyAndChallenge,spki) },
    { SEC_ASN1_IA5_STRING, offsetof(CERTPublicKeyAndChallenge,challenge) },
    { 0 }
};

const SEC_ASN1Template SECKEY_RSAPublicKeyTemplate[] = {
    { SEC_ASN1_SEQUENCE, 0, NULL, sizeof(SECKEYPublicKey) },
    { SEC_ASN1_INTEGER, offsetof(SECKEYPublicKey,u.rsa.modulus), },
    { SEC_ASN1_INTEGER, offsetof(SECKEYPublicKey,u.rsa.publicExponent), },
    { 0, }
};

static const SEC_ASN1Template seckey_PointerToAlgorithmIDTemplate[] = {
    { SEC_ASN1_POINTER | SEC_ASN1_XTRN, 0,
      SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) }
};

/* Parameters for SEC_OID_PKCS1_RSA_PSS_SIGNATURE */
const SEC_ASN1Template SECKEY_RSAPSSParamsTemplate[] =
{
    { SEC_ASN1_SEQUENCE, 0, NULL, sizeof(SECKEYRSAPSSParams) },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_EXPLICIT |
          SEC_ASN1_CONTEXT_SPECIFIC | 0,
          offsetof(SECKEYRSAPSSParams, hashAlg),
          seckey_PointerToAlgorithmIDTemplate },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_EXPLICIT |
          SEC_ASN1_CONTEXT_SPECIFIC | 1,
          offsetof(SECKEYRSAPSSParams, maskAlg),
          seckey_PointerToAlgorithmIDTemplate },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_EXPLICIT |
          SEC_ASN1_XTRN | SEC_ASN1_CONTEXT_SPECIFIC | 2,
          offsetof(SECKEYRSAPSSParams, saltLength),
          SEC_ASN1_SUB(SEC_IntegerTemplate) },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_EXPLICIT |
          SEC_ASN1_XTRN | SEC_ASN1_CONTEXT_SPECIFIC | 3,
          offsetof(SECKEYRSAPSSParams, trailerField),
          SEC_ASN1_SUB(SEC_IntegerTemplate) },
    { 0 }
};

const SEC_ASN1Template SECKEY_DSAPublicKeyTemplate[] = {
    { SEC_ASN1_INTEGER, offsetof(SECKEYPublicKey,u.dsa.publicValue), },
    { 0, }
};

const SEC_ASN1Template SECKEY_PQGParamsTemplate[] = {
    { SEC_ASN1_SEQUENCE, 0, NULL, sizeof(SECKEYPQGParams) },
    { SEC_ASN1_INTEGER, offsetof(SECKEYPQGParams,prime) },
    { SEC_ASN1_INTEGER, offsetof(SECKEYPQGParams,subPrime) },
    { SEC_ASN1_INTEGER, offsetof(SECKEYPQGParams,base) },
    { 0, }
};

const SEC_ASN1Template SECKEY_DHPublicKeyTemplate[] = {
    { SEC_ASN1_INTEGER, offsetof(SECKEYPublicKey,u.dh.publicValue), },
    { 0, }
};

const SEC_ASN1Template SECKEY_DHParamKeyTemplate[] = {
    { SEC_ASN1_SEQUENCE,  0, NULL, sizeof(SECKEYPublicKey) },
    { SEC_ASN1_INTEGER, offsetof(SECKEYPublicKey,u.dh.prime), },
    { SEC_ASN1_INTEGER, offsetof(SECKEYPublicKey,u.dh.base), },
    /* XXX chrisk: this needs to be expanded for decoding of j and validationParms (RFC2459 7.3.2) */
    { SEC_ASN1_SKIP_REST },
    { 0, }
};

SEC_ASN1_CHOOSER_IMPLEMENT(SECKEY_DSAPublicKeyTemplate)
SEC_ASN1_CHOOSER_IMPLEMENT(SECKEY_RSAPublicKeyTemplate)
SEC_ASN1_CHOOSER_IMPLEMENT(SECKEY_RSAPSSParamsTemplate)
SEC_ASN1_CHOOSER_IMPLEMENT(CERT_SubjectPublicKeyInfoTemplate)

/*
 * See bugzilla bug 125359
 * Since NSS (via PKCS#11) wants to handle big integers as unsigned ints,
 * all of the templates above that en/decode into integers must be converted
 * from ASN.1's signed integer type.  This is done by marking either the
 * source or destination (encoding or decoding, respectively) type as
 * siUnsignedInteger.
 */
static void
prepare_rsa_pub_key_for_asn1(SECKEYPublicKey *pubk)
{
    pubk->u.rsa.modulus.type = siUnsignedInteger;
    pubk->u.rsa.publicExponent.type = siUnsignedInteger;
}

static void
prepare_dsa_pub_key_for_asn1(SECKEYPublicKey *pubk)
{
    pubk->u.dsa.publicValue.type = siUnsignedInteger;
}

static void
prepare_pqg_params_for_asn1(SECKEYPQGParams *params)
{
    params->prime.type = siUnsignedInteger;
    params->subPrime.type = siUnsignedInteger;
    params->base.type = siUnsignedInteger;
}

static void
prepare_dh_pub_key_for_asn1(SECKEYPublicKey *pubk)
{
    pubk->u.dh.prime.type = siUnsignedInteger;
    pubk->u.dh.base.type = siUnsignedInteger;
    pubk->u.dh.publicValue.type = siUnsignedInteger;
}

/* Create an RSA key pair is any slot able to do so.
** The created keys are "session" (temporary), not "token" (permanent), 
** and they are "sensitive", which makes them costly to move to another token.
*/
SECKEYPrivateKey *
SECKEY_CreateRSAPrivateKey(int keySizeInBits,SECKEYPublicKey **pubk, void *cx)
{
    SECKEYPrivateKey *privk;
    PK11RSAGenParams param;
    PK11SlotInfo *slot = PK11_GetBestSlot(CKM_RSA_PKCS_KEY_PAIR_GEN,cx);
    if (!slot) {
	return NULL;
    }

    param.keySizeInBits = keySizeInBits;
    param.pe = 65537L;
    
    privk = PK11_GenerateKeyPair(slot,CKM_RSA_PKCS_KEY_PAIR_GEN,&param,pubk,
					PR_FALSE, PR_TRUE, cx);
    PK11_FreeSlot(slot);
    return(privk);
}

/* Create a DH key pair in any slot able to do so, 
** This is a "session" (temporary), not "token" (permanent) key. 
** Because of the high probability that this key will need to be moved to
** another token, and the high cost of moving "sensitive" keys, we attempt
** to create this key pair without the "sensitive" attribute, but revert to 
** creating a "sensitive" key if necessary.
*/
SECKEYPrivateKey *
SECKEY_CreateDHPrivateKey(SECKEYDHParams *param, SECKEYPublicKey **pubk, void *cx)
{
    SECKEYPrivateKey *privk;
    PK11SlotInfo *slot;

    if (!param || !param->base.data || !param->prime.data ||
        SECKEY_BigIntegerBitLength(&param->prime) < DH_MIN_P_BITS ||
        param->base.len == 0 || param->base.len > param->prime.len + 1 ||
	(param->base.len == 1 && param->base.data[0] == 0)) {
	PORT_SetError(SEC_ERROR_INVALID_ARGS);
	return NULL;
    }

    slot = PK11_GetBestSlot(CKM_DH_PKCS_KEY_PAIR_GEN,cx);
    if (!slot) {
	return NULL;
    }

    privk = PK11_GenerateKeyPair(slot, CKM_DH_PKCS_KEY_PAIR_GEN, param, 
                                 pubk, PR_FALSE, PR_FALSE, cx);
    if (!privk) 
	privk = PK11_GenerateKeyPair(slot, CKM_DH_PKCS_KEY_PAIR_GEN, param, 
	                             pubk, PR_FALSE, PR_TRUE, cx);

    PK11_FreeSlot(slot);
    return(privk);
}

/* Create an EC key pair in any slot able to do so, 
** This is a "session" (temporary), not "token" (permanent) key. 
** Because of the high probability that this key will need to be moved to
** another token, and the high cost of moving "sensitive" keys, we attempt
** to create this key pair without the "sensitive" attribute, but revert to 
** creating a "sensitive" key if necessary.
*/
SECKEYPrivateKey *
SECKEY_CreateECPrivateKey(SECKEYECParams *param, SECKEYPublicKey **pubk, void *cx)
{
    SECKEYPrivateKey *privk;
    PK11SlotInfo *slot = PK11_GetBestSlot(CKM_EC_KEY_PAIR_GEN,cx);
    if (!slot) {
	return NULL;
    }

    privk = PK11_GenerateKeyPairWithOpFlags(slot, CKM_EC_KEY_PAIR_GEN, 
                        param, pubk,
                        PK11_ATTR_SESSION | PK11_ATTR_INSENSITIVE | 
                        PK11_ATTR_PUBLIC,
                        CKF_DERIVE, CKF_DERIVE|CKF_SIGN,cx);
    if (!privk) 
        privk = PK11_GenerateKeyPairWithOpFlags(slot, CKM_EC_KEY_PAIR_GEN, 
                        param, pubk,
                        PK11_ATTR_SESSION | PK11_ATTR_SENSITIVE | 
                        PK11_ATTR_PRIVATE,
                        CKF_DERIVE, CKF_DERIVE|CKF_SIGN,cx);

    PK11_FreeSlot(slot);
    return(privk);
}

void
SECKEY_DestroyPrivateKey(SECKEYPrivateKey *privk)
{
    if (privk) {
	if (privk->pkcs11Slot) {
	    if (privk->pkcs11IsTemp) {
	    	PK11_DestroyObject(privk->pkcs11Slot,privk->pkcs11ID);
	    }
	    PK11_FreeSlot(privk->pkcs11Slot);

	}
    	if (privk->arena) {
	    PORT_FreeArena(privk->arena, PR_TRUE);
	}
    }
}

void
SECKEY_DestroyPublicKey(SECKEYPublicKey *pubk)
{
    if (pubk) {
	if (pubk->pkcs11Slot) {
	    if (!PK11_IsPermObject(pubk->pkcs11Slot,pubk->pkcs11ID)) {
		PK11_DestroyObject(pubk->pkcs11Slot,pubk->pkcs11ID);
	    }
	    PK11_FreeSlot(pubk->pkcs11Slot);
	}
    	if (pubk->arena) {
	    PORT_FreeArena(pubk->arena, PR_FALSE);
	}
    }
}

SECStatus
SECKEY_CopySubjectPublicKeyInfo(PLArenaPool *arena,
			     CERTSubjectPublicKeyInfo *to,
			     CERTSubjectPublicKeyInfo *from)
{
    SECStatus rv;
    SECItem spk;

    rv = SECOID_CopyAlgorithmID(arena, &to->algorithm, &from->algorithm);
    if (rv == SECSuccess) {
	/*
	 * subjectPublicKey is a bit string, whose length is in bits.
	 * Convert the length from bits to bytes for SECITEM_CopyItem.
	 */
	spk = from->subjectPublicKey;
	DER_ConvertBitString(&spk);
	rv = SECITEM_CopyItem(arena, &to->subjectPublicKey, &spk);
	/* Set the length back to bits. */
	if (rv == SECSuccess) {
	    to->subjectPublicKey.len = from->subjectPublicKey.len;
	}
    }

    return rv;
}

/* Procedure to update the pqg parameters for a cert's public key.
 * pqg parameters only need to be updated for DSA certificates.
 * The procedure uses calls to itself recursively to update a certificate
 * issuer's pqg parameters.  Some important rules are:
 *    - Do nothing if the cert already has PQG parameters.
 *    - If the cert does not have PQG parameters, obtain them from the issuer.
 *    - A valid cert chain cannot have a DSA cert without
 *      pqg parameters that has a parent that is not a DSA cert.  */

static SECStatus
seckey_UpdateCertPQGChain(CERTCertificate * subjectCert, int count)
{
    SECStatus rv;
    SECOidData *oid=NULL;
    int tag;
    CERTSubjectPublicKeyInfo * subjectSpki=NULL;
    CERTSubjectPublicKeyInfo * issuerSpki=NULL;
    CERTCertificate *issuerCert = NULL;

    rv = SECSuccess;

    /* increment cert chain length counter*/
    count++;

    /* check if cert chain length exceeds the maximum length*/
    if (count > CERT_MAX_CERT_CHAIN) {
	return SECFailure;
    }

    oid = SECOID_FindOID(&subjectCert->subjectPublicKeyInfo.algorithm.algorithm);            
    if (oid != NULL) {  
        tag = oid->offset;
             
        /* Check if cert has a DSA or EC public key. If not, return
         * success since no PQG params need to be updated.
	 *
	 * Question: do we really need to do this for EC keys. They don't have
	 * PQG parameters, but they do have parameters. The question is does
	 * the child cert inherit thost parameters for EC from the parent, or
	 * do we always include those parameters in each cert.
	 */

	if ( (tag != SEC_OID_ANSIX9_DSA_SIGNATURE) &&
             (tag != SEC_OID_ANSIX9_DSA_SIGNATURE_WITH_SHA1_DIGEST) &&
             (tag != SEC_OID_NIST_DSA_SIGNATURE_WITH_SHA224_DIGEST) &&
             (tag != SEC_OID_NIST_DSA_SIGNATURE_WITH_SHA256_DIGEST) &&
             (tag != SEC_OID_BOGUS_DSA_SIGNATURE_WITH_SHA1_DIGEST) &&
             (tag != SEC_OID_SDN702_DSA_SIGNATURE) &&
             (tag != SEC_OID_ANSIX962_EC_PUBLIC_KEY) ) {
            
            return SECSuccess;
        }
    } else {
        return SECFailure;  /* return failure if oid is NULL */  
    }

    /* if cert has PQG parameters, return success */

    subjectSpki=&subjectCert->subjectPublicKeyInfo;

    if (subjectSpki->algorithm.parameters.len != 0) {
        return SECSuccess;
    }

    /* check if the cert is self-signed */
    if (subjectCert->isRoot) {
      /* fail since cert is self-signed and has no pqg params. */
	return SECFailure;     
    }
     
    /* get issuer cert */
    issuerCert = CERT_FindCertIssuer(subjectCert, PR_Now(), certUsageAnyCA);
    if ( ! issuerCert ) {
	return SECFailure;
    }

    /* if parent is not DSA, return failure since
       we don't allow this case. */

    oid = SECOID_FindOID(&issuerCert->subjectPublicKeyInfo.algorithm.algorithm);
    if (oid != NULL) {  
        tag = oid->offset;
             
        /* Check if issuer cert has a DSA public key. If not,
         * return failure.   */

	if ( (tag != SEC_OID_ANSIX9_DSA_SIGNATURE) &&
             (tag != SEC_OID_ANSIX9_DSA_SIGNATURE_WITH_SHA1_DIGEST) &&
             (tag != SEC_OID_NIST_DSA_SIGNATURE_WITH_SHA224_DIGEST) &&
             (tag != SEC_OID_NIST_DSA_SIGNATURE_WITH_SHA256_DIGEST) &&
             (tag != SEC_OID_BOGUS_DSA_SIGNATURE_WITH_SHA1_DIGEST) &&
             (tag != SEC_OID_SDN702_DSA_SIGNATURE) &&
             (tag != SEC_OID_ANSIX962_EC_PUBLIC_KEY) ) {            
            rv = SECFailure;
            goto loser;
        }
    } else {
        rv = SECFailure;  /* return failure if oid is NULL */  
        goto loser;
    }


    /* at this point the subject cert has no pqg parameters and the
     * issuer cert has a DSA public key.  Update the issuer's
     * pqg parameters with a recursive call to this same function. */

    rv = seckey_UpdateCertPQGChain(issuerCert, count);
    if (rv != SECSuccess) {
        rv = SECFailure;
        goto loser;
    }

    /* ensure issuer has pqg parameters */

    issuerSpki=&issuerCert->subjectPublicKeyInfo;
    if (issuerSpki->algorithm.parameters.len == 0) {
        rv = SECFailure; 
    }

    /* if update was successful and pqg params present, then copy the
     * parameters to the subject cert's key. */

    if (rv == SECSuccess) {
        rv = SECITEM_CopyItem(subjectCert->arena,
                              &subjectSpki->algorithm.parameters, 
	   		      &issuerSpki->algorithm.parameters);
    }

loser:
    if (issuerCert) {
        CERT_DestroyCertificate(issuerCert);
    }
    return rv;

}
 

SECStatus
SECKEY_UpdateCertPQG(CERTCertificate * subjectCert)
{
    if (!subjectCert) {
        PORT_SetError(SEC_ERROR_INVALID_ARGS);
	return SECFailure;
    }
    return seckey_UpdateCertPQGChain(subjectCert,0);
}
   

/* Decode the DSA PQG parameters.  The params could be stored in two
 * possible formats, the old fortezza-only wrapped format or
 * the normal standard format.  Store the decoded parameters in
 * a V3 certificate data structure.  */ 

static SECStatus
seckey_DSADecodePQG(PLArenaPool *arena, SECKEYPublicKey *pubk,
                    const SECItem *params) {
    SECStatus rv;
    SECItem newparams;

    if (params == NULL) return SECFailure; 
    
    if (params->data == NULL) return SECFailure;

    PORT_Assert(arena);

    /* make a copy of the data into the arena so QuickDER output is valid */
    rv = SECITEM_CopyItem(arena, &newparams, params);

    /* Check if params use the standard format.
     * The value 0xa1 will appear in the first byte of the parameter data
     * if the PQG parameters are not using the standard format.  This
     * code should be changed to use a better method to detect non-standard
     * parameters.    */

    if ((newparams.data[0] != 0xa1) &&
        (newparams.data[0] != 0xa0)) {
    
        if (SECSuccess == rv) {
             /* PQG params are in the standard format */
             prepare_pqg_params_for_asn1(&pubk->u.dsa.params);
             rv = SEC_QuickDERDecodeItem(arena, &pubk->u.dsa.params,
                                 SECKEY_PQGParamsTemplate,
                                 &newparams);
        }
    } else {

        if (SECSuccess == rv) {
            /* else the old fortezza-only wrapped format is used. */
            PORT_SetError(SEC_ERROR_BAD_DER);
            rv = SECFailure;
        }
    }
    return rv;
}


/* Function used to make an oid tag to a key type */
KeyType 
seckey_GetKeyType (SECOidTag tag) {
    KeyType keyType;

    switch (tag) {
      case SEC_OID_X500_RSA_ENCRYPTION:
      case SEC_OID_PKCS1_RSA_ENCRYPTION:
	keyType = rsaKey;
	break;
      case SEC_OID_PKCS1_RSA_PSS_SIGNATURE:
	keyType = rsaPssKey;
	break;
      case SEC_OID_PKCS1_RSA_OAEP_ENCRYPTION:
	keyType = rsaOaepKey;
	break;
      case SEC_OID_ANSIX9_DSA_SIGNATURE:
	keyType = dsaKey;
	break;
      case SEC_OID_MISSI_KEA_DSS_OLD:
      case SEC_OID_MISSI_KEA_DSS:
      case SEC_OID_MISSI_DSS_OLD:
      case SEC_OID_MISSI_DSS:  
	keyType = fortezzaKey;
	break;
      case SEC_OID_MISSI_KEA:
      case SEC_OID_MISSI_ALT_KEA:
	keyType = keaKey;
	break;
      case SEC_OID_X942_DIFFIE_HELMAN_KEY:
	keyType = dhKey;
	break;
      case SEC_OID_ANSIX962_EC_PUBLIC_KEY:
	keyType = ecKey;
	break;
      /* accommodate applications that hand us a signature type when they 
	* should be handing us a cipher type */
      case SEC_OID_PKCS1_MD5_WITH_RSA_ENCRYPTION:
      case SEC_OID_PKCS1_SHA1_WITH_RSA_ENCRYPTION:
      case SEC_OID_PKCS1_SHA224_WITH_RSA_ENCRYPTION:
      case SEC_OID_PKCS1_SHA256_WITH_RSA_ENCRYPTION:
      case SEC_OID_PKCS1_SHA384_WITH_RSA_ENCRYPTION:
      case SEC_OID_PKCS1_SHA512_WITH_RSA_ENCRYPTION:
	keyType = rsaKey;
	break;
      default:
	keyType = nullKey;
    }
    return keyType;
}

/* Function used to determine what kind of cert we are dealing with. */
KeyType 
CERT_GetCertKeyType (const CERTSubjectPublicKeyInfo *spki) 
{
    return seckey_GetKeyType(SECOID_GetAlgorithmTag(&spki->algorithm));
}

static SECKEYPublicKey *
seckey_ExtractPublicKey(const CERTSubjectPublicKeyInfo *spki)
{
    SECKEYPublicKey *pubk;
    SECItem os, newOs, newParms;
    SECStatus rv;
    PLArenaPool *arena;
    SECOidTag tag;

    arena = PORT_NewArena (DER_DEFAULT_CHUNKSIZE);
    if (arena == NULL)
	return NULL;

    pubk = (SECKEYPublicKey *) PORT_ArenaZAlloc(arena, sizeof(SECKEYPublicKey));
    if (pubk == NULL) {
	PORT_FreeArena (arena, PR_FALSE);
	return NULL;
    }

    pubk->arena = arena;
    pubk->pkcs11Slot = 0;
    pubk->pkcs11ID = CK_INVALID_HANDLE;


    /* Convert bit string length from bits to bytes */
    os = spki->subjectPublicKey;
    DER_ConvertBitString (&os);

    tag = SECOID_GetAlgorithmTag(&spki->algorithm);

    /* copy the DER into the arena, since Quick DER returns data that points
       into the DER input, which may get freed by the caller */
    rv = SECITEM_CopyItem(arena, &newOs, &os);
    if ( rv == SECSuccess )
    switch ( tag ) {
      case SEC_OID_X500_RSA_ENCRYPTION:
      case SEC_OID_PKCS1_RSA_ENCRYPTION:
	pubk->keyType = rsaKey;
	prepare_rsa_pub_key_for_asn1(pubk);        
        rv = SEC_QuickDERDecodeItem(arena, pubk, SECKEY_RSAPublicKeyTemplate, &newOs);
	if (rv == SECSuccess)
	    return pubk;
	break;
      case SEC_OID_ANSIX9_DSA_SIGNATURE:
      case SEC_OID_SDN702_DSA_SIGNATURE:
	pubk->keyType = dsaKey;
	prepare_dsa_pub_key_for_asn1(pubk);
	rv = SEC_QuickDERDecodeItem(arena, pubk, SECKEY_DSAPublicKeyTemplate, &newOs);
	if (rv != SECSuccess) break;

        rv = seckey_DSADecodePQG(arena, pubk,
                                 &spki->algorithm.parameters); 

	if (rv == SECSuccess) return pubk;
	break;
      case SEC_OID_X942_DIFFIE_HELMAN_KEY:
	pubk->keyType = dhKey;
	prepare_dh_pub_key_for_asn1(pubk);
	rv = SEC_QuickDERDecodeItem(arena, pubk, SECKEY_DHPublicKeyTemplate, &newOs);
	if (rv != SECSuccess) break;

        /* copy the DER into the arena, since Quick DER returns data that points
           into the DER input, which may get freed by the caller */
        rv = SECITEM_CopyItem(arena, &newParms, &spki->algorithm.parameters);
        if ( rv != SECSuccess )
            break;

        rv = SEC_QuickDERDecodeItem(arena, pubk, SECKEY_DHParamKeyTemplate,
                                 &newParms); 

	if (rv == SECSuccess) return pubk;
	break;
      case SEC_OID_ANSIX962_EC_PUBLIC_KEY:
	pubk->keyType = ecKey;
	pubk->u.ec.size = 0;

	/* Since PKCS#11 directly takes the DER encoding of EC params
	 * and public value, we don't need any decoding here.
	 */
        rv = SECITEM_CopyItem(arena, &pubk->u.ec.DEREncodedParams, 
	    &spki->algorithm.parameters);
        if ( rv != SECSuccess )
            break;
        rv = SECITEM_CopyItem(arena, &pubk->u.ec.publicValue, &newOs);
	if (rv == SECSuccess) return pubk;
	break;

      default:
	PORT_SetError(SEC_ERROR_UNSUPPORTED_KEYALG);
	rv = SECFailure;
	break;
    }

    SECKEY_DestroyPublicKey (pubk);
    return NULL;
}


/* required for JSS */
SECKEYPublicKey *
SECKEY_ExtractPublicKey(const CERTSubjectPublicKeyInfo *spki)
{
    return seckey_ExtractPublicKey(spki);
}

SECKEYPublicKey *
CERT_ExtractPublicKey(CERTCertificate *cert)
{
    SECStatus rv;

    if (!cert) {
        PORT_SetError(SEC_ERROR_INVALID_ARGS);
	return NULL;
    }
    rv = SECKEY_UpdateCertPQG(cert);
    if (rv != SECSuccess) return NULL;

    return seckey_ExtractPublicKey(&cert->subjectPublicKeyInfo);
}

int
SECKEY_ECParamsToKeySize(const SECItem *encodedParams)
{
    SECOidTag tag;
    SECItem oid = { siBuffer, NULL, 0};
	
    /* The encodedParams data contains 0x06 (SEC_ASN1_OBJECT_ID),
     * followed by the length of the curve oid and the curve oid.
     */
    oid.len = encodedParams->data[1];
    oid.data = encodedParams->data + 2;
    if ((tag = SECOID_FindOIDTag(&oid)) == SEC_OID_UNKNOWN)
	return 0;

    switch (tag) {
    case SEC_OID_SECG_EC_SECP112R1:
    case SEC_OID_SECG_EC_SECP112R2:
        return 112;

    case SEC_OID_SECG_EC_SECT113R1:
    case SEC_OID_SECG_EC_SECT113R2:
	return 113;

    case SEC_OID_SECG_EC_SECP128R1:
    case SEC_OID_SECG_EC_SECP128R2:
	return 128;

    case SEC_OID_SECG_EC_SECT131R1:
    case SEC_OID_SECG_EC_SECT131R2:
	return 131;

    case SEC_OID_SECG_EC_SECP160K1:
    case SEC_OID_SECG_EC_SECP160R1:
    case SEC_OID_SECG_EC_SECP160R2:
	return 160;

    case SEC_OID_SECG_EC_SECT163K1:
    case SEC_OID_SECG_EC_SECT163R1:
    case SEC_OID_SECG_EC_SECT163R2:
    case SEC_OID_ANSIX962_EC_C2PNB163V1:
    case SEC_OID_ANSIX962_EC_C2PNB163V2:
    case SEC_OID_ANSIX962_EC_C2PNB163V3:
	return 163;

    case SEC_OID_ANSIX962_EC_C2PNB176V1:
	return 176;

    case SEC_OID_ANSIX962_EC_C2TNB191V1:
    case SEC_OID_ANSIX962_EC_C2TNB191V2:
    case SEC_OID_ANSIX962_EC_C2TNB191V3:
    case SEC_OID_ANSIX962_EC_C2ONB191V4:
    case SEC_OID_ANSIX962_EC_C2ONB191V5:
	return 191;

    case SEC_OID_SECG_EC_SECP192K1:
    case SEC_OID_ANSIX962_EC_PRIME192V1:
    case SEC_OID_ANSIX962_EC_PRIME192V2:
    case SEC_OID_ANSIX962_EC_PRIME192V3:
	return 192;

    case SEC_OID_SECG_EC_SECT193R1:
    case SEC_OID_SECG_EC_SECT193R2:
	return 193;

    case SEC_OID_ANSIX962_EC_C2PNB208W1:
	return 208;

    case SEC_OID_SECG_EC_SECP224K1:
    case SEC_OID_SECG_EC_SECP224R1:
	return 224;

    case SEC_OID_SECG_EC_SECT233K1:
    case SEC_OID_SECG_EC_SECT233R1:
	return 233;

    case SEC_OID_SECG_EC_SECT239K1:
    case SEC_OID_ANSIX962_EC_C2TNB239V1:
    case SEC_OID_ANSIX962_EC_C2TNB239V2:
    case SEC_OID_ANSIX962_EC_C2TNB239V3:
    case SEC_OID_ANSIX962_EC_C2ONB239V4:
    case SEC_OID_ANSIX962_EC_C2ONB239V5:
    case SEC_OID_ANSIX962_EC_PRIME239V1:
    case SEC_OID_ANSIX962_EC_PRIME239V2:
    case SEC_OID_ANSIX962_EC_PRIME239V3:
	return 239;

    case SEC_OID_SECG_EC_SECP256K1:
    case SEC_OID_ANSIX962_EC_PRIME256V1:
	return 256;

    case SEC_OID_ANSIX962_EC_C2PNB272W1:
	return 272;

    case SEC_OID_SECG_EC_SECT283K1:
    case SEC_OID_SECG_EC_SECT283R1:
	return 283;

    case SEC_OID_ANSIX962_EC_C2PNB304W1:
	return 304;

    case SEC_OID_ANSIX962_EC_C2TNB359V1:
	return 359;

    case SEC_OID_ANSIX962_EC_C2PNB368W1:
	return 368;

    case SEC_OID_SECG_EC_SECP384R1:
	return 384;

    case SEC_OID_SECG_EC_SECT409K1:
    case SEC_OID_SECG_EC_SECT409R1:
	return 409;

    case SEC_OID_ANSIX962_EC_C2TNB431R1:
	return 431;

    case SEC_OID_SECG_EC_SECP521R1:
	return 521;

    case SEC_OID_SECG_EC_SECT571K1:
    case SEC_OID_SECG_EC_SECT571R1:
	return 571;

    default:
	PORT_SetError(SEC_ERROR_UNSUPPORTED_ELLIPTIC_CURVE);
	return 0;
    }
}

int
SECKEY_ECParamsToBasePointOrderLen(const SECItem *encodedParams)
{
    SECOidTag tag;
    SECItem oid = { siBuffer, NULL, 0};
	
    /* The encodedParams data contains 0x06 (SEC_ASN1_OBJECT_ID),
     * followed by the length of the curve oid and the curve oid.
     */
    oid.len = encodedParams->data[1];
    oid.data = encodedParams->data + 2;
    if ((tag = SECOID_FindOIDTag(&oid)) == SEC_OID_UNKNOWN)
	return 0;

    switch (tag) {
    case SEC_OID_SECG_EC_SECP112R1:
        return 112;
    case SEC_OID_SECG_EC_SECP112R2:
        return 110;

    case SEC_OID_SECG_EC_SECT113R1:
    case SEC_OID_SECG_EC_SECT113R2:
	return 113;

    case SEC_OID_SECG_EC_SECP128R1:
	return 128;
    case SEC_OID_SECG_EC_SECP128R2:
	return 126;

    case SEC_OID_SECG_EC_SECT131R1:
    case SEC_OID_SECG_EC_SECT131R2:
	return 131;

    case SEC_OID_SECG_EC_SECP160K1:
    case SEC_OID_SECG_EC_SECP160R1:
    case SEC_OID_SECG_EC_SECP160R2:
	return 161;

    case SEC_OID_SECG_EC_SECT163K1:
	return 163;
    case SEC_OID_SECG_EC_SECT163R1:
	return 162;
    case SEC_OID_SECG_EC_SECT163R2:
    case SEC_OID_ANSIX962_EC_C2PNB163V1:
	return 163;
    case SEC_OID_ANSIX962_EC_C2PNB163V2:
    case SEC_OID_ANSIX962_EC_C2PNB163V3:
	return 162;

    case SEC_OID_ANSIX962_EC_C2PNB176V1:
	return 161;

    case SEC_OID_ANSIX962_EC_C2TNB191V1:
	return 191;
    case SEC_OID_ANSIX962_EC_C2TNB191V2:
	return 190;
    case SEC_OID_ANSIX962_EC_C2TNB191V3:
	return 189;
    case SEC_OID_ANSIX962_EC_C2ONB191V4:
	return 191;
    case SEC_OID_ANSIX962_EC_C2ONB191V5:
	return 188;

    case SEC_OID_SECG_EC_SECP192K1:
    case SEC_OID_ANSIX962_EC_PRIME192V1:
    case SEC_OID_ANSIX962_EC_PRIME192V2:
    case SEC_OID_ANSIX962_EC_PRIME192V3:
	return 192;

    case SEC_OID_SECG_EC_SECT193R1:
    case SEC_OID_SECG_EC_SECT193R2:
	return 193;

    case SEC_OID_ANSIX962_EC_C2PNB208W1:
	return 193;

    case SEC_OID_SECG_EC_SECP224K1:
	return 225;
    case SEC_OID_SECG_EC_SECP224R1:
	return 224;

    case SEC_OID_SECG_EC_SECT233K1:
	return 232;
    case SEC_OID_SECG_EC_SECT233R1:
	return 233;

    case SEC_OID_SECG_EC_SECT239K1:
    case SEC_OID_ANSIX962_EC_C2TNB239V1:
	return 238;
    case SEC_OID_ANSIX962_EC_C2TNB239V2:
	return 237;
    case SEC_OID_ANSIX962_EC_C2TNB239V3:
	return 236;
    case SEC_OID_ANSIX962_EC_C2ONB239V4:
	return 238;
    case SEC_OID_ANSIX962_EC_C2ONB239V5:
	return 237;
    case SEC_OID_ANSIX962_EC_PRIME239V1:
    case SEC_OID_ANSIX962_EC_PRIME239V2:
    case SEC_OID_ANSIX962_EC_PRIME239V3:
	return 239;

    case SEC_OID_SECG_EC_SECP256K1:
    case SEC_OID_ANSIX962_EC_PRIME256V1:
	return 256;

    case SEC_OID_ANSIX962_EC_C2PNB272W1:
	return 257;

    case SEC_OID_SECG_EC_SECT283K1:
	return 281;
    case SEC_OID_SECG_EC_SECT283R1:
	return 282;

    case SEC_OID_ANSIX962_EC_C2PNB304W1:
	return 289;

    case SEC_OID_ANSIX962_EC_C2TNB359V1:
	return 353;

    case SEC_OID_ANSIX962_EC_C2PNB368W1:
	return 353;

    case SEC_OID_SECG_EC_SECP384R1:
	return 384;

    case SEC_OID_SECG_EC_SECT409K1:
	return 407;
    case SEC_OID_SECG_EC_SECT409R1:
	return 409;

    case SEC_OID_ANSIX962_EC_C2TNB431R1:
	return 418;

    case SEC_OID_SECG_EC_SECP521R1:
	return 521;

    case SEC_OID_SECG_EC_SECT571K1:
    case SEC_OID_SECG_EC_SECT571R1:
	return 570;

    default:
	PORT_SetError(SEC_ERROR_UNSUPPORTED_ELLIPTIC_CURVE);
	return 0;
    }
}

/* The number of bits in the number from the first non-zero bit onward. */
unsigned
SECKEY_BigIntegerBitLength(const SECItem *number)
{
    const unsigned char *p;
    unsigned octets;
    unsigned bits;

    if (!number || !number->data) {
        PORT_SetError(SEC_ERROR_INVALID_KEY);
        return 0;
    }

    p = number->data;
    octets = number->len;
    while (octets > 0 && !*p) {
        ++p;
        --octets;
    }
    if (octets == 0) {
        return 0;
    }
    /* bits = 7..1 because we know at least one bit is set already */
    /* Note: This could do a binary search, but this is faster for keys if we
     * assume that good keys will have the MSB set. */
    for (bits = 7; bits > 0; --bits) {
        if (*p & (1 << bits)) {
            break;
        }
    }
    return octets * 8 + bits - 7;
}

/* returns key strength in bytes (not bits) */
unsigned
SECKEY_PublicKeyStrength(const SECKEYPublicKey *pubk)
{
    return (SECKEY_PublicKeyStrengthInBits(pubk) + 7) / 8;
}

/* returns key strength in bits */
unsigned
SECKEY_PublicKeyStrengthInBits(const SECKEYPublicKey *pubk)
{
    unsigned bitSize = 0;

    if (!pubk) {
        PORT_SetError(SEC_ERROR_INVALID_KEY);
        return 0;
    }

    /* interpret modulus length as key strength */
    switch (pubk->keyType) {
    case rsaKey:
        bitSize = SECKEY_BigIntegerBitLength(&pubk->u.rsa.modulus);
        break;
    case dsaKey:
        bitSize = SECKEY_BigIntegerBitLength(&pubk->u.dsa.publicValue);
        break;
    case dhKey:
        bitSize = SECKEY_BigIntegerBitLength(&pubk->u.dh.publicValue);
        break;
    case ecKey:
        bitSize = SECKEY_ECParamsToKeySize(&pubk->u.ec.DEREncodedParams);
        break;
    default:
        PORT_SetError(SEC_ERROR_INVALID_KEY);
        break;
    }
    return bitSize;
}

/* returns signature length in bytes (not bits) */
unsigned
SECKEY_SignatureLen(const SECKEYPublicKey *pubk)
{
    unsigned char b0;
    unsigned size;

    switch (pubk->keyType) {
    case rsaKey:
    	b0 = pubk->u.rsa.modulus.data[0];
    	return b0 ? pubk->u.rsa.modulus.len : pubk->u.rsa.modulus.len - 1;
    case dsaKey:
	return pubk->u.dsa.params.subPrime.len * 2;
    case ecKey:
	/* Get the base point order length in bits and adjust */
	size =	SECKEY_ECParamsToBasePointOrderLen(
		&pubk->u.ec.DEREncodedParams);
	return ((size + 7)/8) * 2;
    default:
	break;
    }
    PORT_SetError(SEC_ERROR_INVALID_KEY);
    return 0;
}

SECKEYPrivateKey *
SECKEY_CopyPrivateKey(const SECKEYPrivateKey *privk)
{
    SECKEYPrivateKey *copyk;
    PLArenaPool *arena;
    
    if (!privk || !privk->pkcs11Slot) {
	PORT_SetError(SEC_ERROR_INVALID_ARGS);
	return NULL;
    }
    
    arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
    if (arena == NULL) {
	return NULL;
    }

    copyk = (SECKEYPrivateKey *) PORT_ArenaZAlloc (arena, sizeof (SECKEYPrivateKey));
    if (copyk) {
	copyk->arena = arena;
	copyk->keyType = privk->keyType;

	/* copy the PKCS #11 parameters */
	copyk->pkcs11Slot = PK11_ReferenceSlot(privk->pkcs11Slot);
	/* if the key we're referencing was a temparary key we have just
	 * created, that we want to go away when we're through, we need
	 * to make a copy of it */
	if (privk->pkcs11IsTemp) {
	    copyk->pkcs11ID = 
			PK11_CopyKey(privk->pkcs11Slot,privk->pkcs11ID);
	    if (copyk->pkcs11ID == CK_INVALID_HANDLE) goto fail;
	} else {
	    copyk->pkcs11ID = privk->pkcs11ID;
	}
	copyk->pkcs11IsTemp = privk->pkcs11IsTemp;
	copyk->wincx = privk->wincx;
	copyk->staticflags = privk->staticflags;
	return copyk;
    } else {
	PORT_SetError (SEC_ERROR_NO_MEMORY);
    }

fail:
    PORT_FreeArena (arena, PR_FALSE);
    return NULL;
}

SECKEYPublicKey *
SECKEY_CopyPublicKey(const SECKEYPublicKey *pubk)
{
    SECKEYPublicKey *copyk;
    PLArenaPool *arena;
    SECStatus rv = SECSuccess;

    arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
    if (arena == NULL) {
	PORT_SetError (SEC_ERROR_NO_MEMORY);
	return NULL;
    }

    copyk = (SECKEYPublicKey *) PORT_ArenaZAlloc (arena, sizeof (SECKEYPublicKey));
    if (!copyk) {
        PORT_FreeArena (arena, PR_FALSE);
        PORT_SetError (SEC_ERROR_NO_MEMORY);
        return NULL;
    }

    copyk->arena = arena;
    copyk->keyType = pubk->keyType;
    if (pubk->pkcs11Slot && 
        PK11_IsPermObject(pubk->pkcs11Slot,pubk->pkcs11ID)) {
        copyk->pkcs11Slot = PK11_ReferenceSlot(pubk->pkcs11Slot);
        copyk->pkcs11ID = pubk->pkcs11ID;
    } else {
        copyk->pkcs11Slot = NULL;	/* go get own reference */
        copyk->pkcs11ID = CK_INVALID_HANDLE;
    }
    switch (pubk->keyType) {
      case rsaKey:
          rv = SECITEM_CopyItem(arena, &copyk->u.rsa.modulus,
                                &pubk->u.rsa.modulus);
          if (rv == SECSuccess) {
              rv = SECITEM_CopyItem (arena, &copyk->u.rsa.publicExponent,
                                     &pubk->u.rsa.publicExponent);
              if (rv == SECSuccess)
                  return copyk;
          }
          break;
      case dsaKey:
          rv = SECITEM_CopyItem(arena, &copyk->u.dsa.publicValue,
                                &pubk->u.dsa.publicValue);
          if (rv != SECSuccess) break;
          rv = SECITEM_CopyItem(arena, &copyk->u.dsa.params.prime,
                                &pubk->u.dsa.params.prime);
          if (rv != SECSuccess) break;
          rv = SECITEM_CopyItem(arena, &copyk->u.dsa.params.subPrime,
                                &pubk->u.dsa.params.subPrime);
          if (rv != SECSuccess) break;
          rv = SECITEM_CopyItem(arena, &copyk->u.dsa.params.base,
                                &pubk->u.dsa.params.base);
          break;
      case dhKey:
          rv = SECITEM_CopyItem(arena,&copyk->u.dh.prime,&pubk->u.dh.prime);
          if (rv != SECSuccess) break;
          rv = SECITEM_CopyItem(arena,&copyk->u.dh.base,&pubk->u.dh.base);
          if (rv != SECSuccess) break;
          rv = SECITEM_CopyItem(arena, &copyk->u.dh.publicValue, 
                                &pubk->u.dh.publicValue);
          break;
      case ecKey:
          copyk->u.ec.size = pubk->u.ec.size;
          rv = SECITEM_CopyItem(arena,&copyk->u.ec.DEREncodedParams,
                                &pubk->u.ec.DEREncodedParams);
          if (rv != SECSuccess) break;
          rv = SECITEM_CopyItem(arena,&copyk->u.ec.publicValue,
                                &pubk->u.ec.publicValue);
          break;
      case nullKey:
          return copyk;
      default:
          PORT_SetError(SEC_ERROR_INVALID_KEY);
          rv = SECFailure;
          break;
    }
    if (rv == SECSuccess)
        return copyk;

    SECKEY_DestroyPublicKey (copyk);
    return NULL;
}


SECKEYPublicKey *
SECKEY_ConvertToPublicKey(SECKEYPrivateKey *privk)
{
    SECKEYPublicKey *pubk;
    PLArenaPool *arena;
    CERTCertificate *cert;
    SECStatus rv;

    /*
     * First try to look up the cert.
     */
    cert = PK11_GetCertFromPrivateKey(privk);
    if (cert) {
	pubk = CERT_ExtractPublicKey(cert);
	CERT_DestroyCertificate(cert);
	return pubk;
    }

    /* couldn't find the cert, build pub key by hand */
    arena = PORT_NewArena (DER_DEFAULT_CHUNKSIZE);
    if (arena == NULL) {
	PORT_SetError (SEC_ERROR_NO_MEMORY);
	return NULL;
    }
    pubk = (SECKEYPublicKey *)PORT_ArenaZAlloc(arena,
						   sizeof (SECKEYPublicKey));
    if (pubk == NULL) {
	PORT_FreeArena(arena,PR_FALSE);
	return NULL;
    }
    pubk->keyType = privk->keyType;
    pubk->pkcs11Slot = NULL;
    pubk->pkcs11ID = CK_INVALID_HANDLE;
    pubk->arena = arena;

    switch(privk->keyType) {
      case nullKey:
      case dhKey:
      case dsaKey:
	/* Nothing to query, if the cert isn't there, we're done -- no way
	 * to get the public key */
	break;
      case rsaKey:
	rv = PK11_ReadAttribute(privk->pkcs11Slot,privk->pkcs11ID,
				CKA_MODULUS,arena,&pubk->u.rsa.modulus);
	if (rv != SECSuccess)  break;
	rv = PK11_ReadAttribute(privk->pkcs11Slot,privk->pkcs11ID,
			CKA_PUBLIC_EXPONENT,arena,&pubk->u.rsa.publicExponent);
	if (rv != SECSuccess)  break;
	return pubk;
	break;
    default:
	break;
    }

    PORT_FreeArena (arena, PR_FALSE);
    return NULL;
}

static CERTSubjectPublicKeyInfo *
seckey_CreateSubjectPublicKeyInfo_helper(SECKEYPublicKey *pubk)
{
    CERTSubjectPublicKeyInfo *spki;
    PLArenaPool *arena;
    SECItem params = { siBuffer, NULL, 0 };

    arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
    if (arena == NULL) {
	PORT_SetError(SEC_ERROR_NO_MEMORY);
	return NULL;
    }

    spki = (CERTSubjectPublicKeyInfo *) PORT_ArenaZAlloc(arena, sizeof (*spki));
    if (spki != NULL) {
	SECStatus rv;
	SECItem *rv_item;
	
	spki->arena = arena;
	switch(pubk->keyType) {
	  case rsaKey:
	    rv = SECOID_SetAlgorithmID(arena, &spki->algorithm,
				     SEC_OID_PKCS1_RSA_ENCRYPTION, 0);
	    if (rv == SECSuccess) {
		/*
		 * DER encode the public key into the subjectPublicKeyInfo.
		 */
		prepare_rsa_pub_key_for_asn1(pubk);
		rv_item = SEC_ASN1EncodeItem(arena, &spki->subjectPublicKey,
					     pubk, SECKEY_RSAPublicKeyTemplate);
		if (rv_item != NULL) {
		    /*
		     * The stored value is supposed to be a BIT_STRING,
		     * so convert the length.
		     */
		    spki->subjectPublicKey.len <<= 3;
		    /*
		     * We got a good one; return it.
		     */
		    return spki;
		}
	    }
	    break;
	  case dsaKey:
	    /* DER encode the params. */
	    prepare_pqg_params_for_asn1(&pubk->u.dsa.params);
	    rv_item = SEC_ASN1EncodeItem(arena, &params, &pubk->u.dsa.params,
					 SECKEY_PQGParamsTemplate);
	    if (rv_item != NULL) {
		rv = SECOID_SetAlgorithmID(arena, &spki->algorithm,
					   SEC_OID_ANSIX9_DSA_SIGNATURE,
					   &params);
		if (rv == SECSuccess) {
		    /*
		     * DER encode the public key into the subjectPublicKeyInfo.
		     */
		    prepare_dsa_pub_key_for_asn1(pubk);
		    rv_item = SEC_ASN1EncodeItem(arena, &spki->subjectPublicKey,
						 pubk,
						 SECKEY_DSAPublicKeyTemplate);
		    if (rv_item != NULL) {
			/*
			 * The stored value is supposed to be a BIT_STRING,
			 * so convert the length.
			 */
			spki->subjectPublicKey.len <<= 3;
			/*
			 * We got a good one; return it.
			 */
			return spki;
		    }
		}
	    }
	    SECITEM_FreeItem(&params, PR_FALSE);
	    break;
	  case ecKey:
	    rv = SECITEM_CopyItem(arena, &params, 
				  &pubk->u.ec.DEREncodedParams);
	    if (rv != SECSuccess) break;

	    rv = SECOID_SetAlgorithmID(arena, &spki->algorithm,
				       SEC_OID_ANSIX962_EC_PUBLIC_KEY,
				       &params);
	    if (rv != SECSuccess) break;

	    rv = SECITEM_CopyItem(arena, &spki->subjectPublicKey,
				  &pubk->u.ec.publicValue);

	    if (rv == SECSuccess) {
	        /*
		 * The stored value is supposed to be a BIT_STRING,
		 * so convert the length.
		 */
	        spki->subjectPublicKey.len <<= 3;
		/*
		 * We got a good one; return it.
		 */
		return spki;
	    }
	    break;
	  case dhKey: /* later... */

	    break;
	  default:
	    break;
	}
    } else {
	PORT_SetError(SEC_ERROR_NO_MEMORY);
    }

    PORT_FreeArena(arena, PR_FALSE);
    return NULL;
}

CERTSubjectPublicKeyInfo *
SECKEY_CreateSubjectPublicKeyInfo(const SECKEYPublicKey *pubk)
{
    CERTSubjectPublicKeyInfo *spki;
    SECKEYPublicKey *tempKey;

    if (!pubk) {
        PORT_SetError(SEC_ERROR_INVALID_ARGS);
        return NULL;
    }

    tempKey = SECKEY_CopyPublicKey(pubk);
    if (!tempKey) {
        return NULL;
    }
    spki = seckey_CreateSubjectPublicKeyInfo_helper(tempKey);
    SECKEY_DestroyPublicKey(tempKey);
    return spki;
}

void
SECKEY_DestroySubjectPublicKeyInfo(CERTSubjectPublicKeyInfo *spki)
{
    if (spki && spki->arena) {
	PORT_FreeArena(spki->arena, PR_FALSE);
    }
}

SECItem *
SECKEY_EncodeDERSubjectPublicKeyInfo(const SECKEYPublicKey *pubk)
{
    CERTSubjectPublicKeyInfo *spki=NULL;
    SECItem *spkiDER=NULL;

    /* get the subjectpublickeyinfo */
    spki = SECKEY_CreateSubjectPublicKeyInfo(pubk);
    if( spki == NULL ) {
	goto finish;
    }

    /* DER-encode the subjectpublickeyinfo */
    spkiDER = SEC_ASN1EncodeItem(NULL /*arena*/, NULL/*dest*/, spki,
					CERT_SubjectPublicKeyInfoTemplate);

    SECKEY_DestroySubjectPublicKeyInfo(spki);

finish:
    return spkiDER;
}


CERTSubjectPublicKeyInfo *
SECKEY_DecodeDERSubjectPublicKeyInfo(const SECItem *spkider)
{
    PLArenaPool *arena;
    CERTSubjectPublicKeyInfo *spki;
    SECStatus rv;
    SECItem newSpkider;

    arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
    if (arena == NULL) {
	PORT_SetError(SEC_ERROR_NO_MEMORY);
	return NULL;
    }

    spki = (CERTSubjectPublicKeyInfo *)
		PORT_ArenaZAlloc(arena, sizeof (CERTSubjectPublicKeyInfo));
    if (spki != NULL) {
	spki->arena = arena;

        /* copy the DER into the arena, since Quick DER returns data that points
           into the DER input, which may get freed by the caller */
        rv = SECITEM_CopyItem(arena, &newSpkider, spkider);
        if ( rv == SECSuccess ) {
            rv = SEC_QuickDERDecodeItem(arena,spki,
				    CERT_SubjectPublicKeyInfoTemplate, &newSpkider);
        }
	if (rv == SECSuccess)
	    return spki;
    } else {
	PORT_SetError(SEC_ERROR_NO_MEMORY);
    }

    PORT_FreeArena(arena, PR_FALSE);
    return NULL;
}

/*
 * Decode a base64 ascii encoded DER encoded subject public key info.
 */
CERTSubjectPublicKeyInfo *
SECKEY_ConvertAndDecodeSubjectPublicKeyInfo(const char *spkistr)
{
    CERTSubjectPublicKeyInfo *spki;
    SECStatus rv;
    SECItem der;

    rv = ATOB_ConvertAsciiToItem(&der, spkistr);
    if (rv != SECSuccess)
	return NULL;

    spki = SECKEY_DecodeDERSubjectPublicKeyInfo(&der);

    PORT_Free(der.data);
    return spki;
}

/*
 * Decode a base64 ascii encoded DER encoded public key and challenge
 * Verify digital signature and make sure challenge matches
 */
CERTSubjectPublicKeyInfo *
SECKEY_ConvertAndDecodePublicKeyAndChallenge(char *pkacstr, char *challenge,
								void *wincx)
{
    CERTSubjectPublicKeyInfo *spki = NULL;
    CERTPublicKeyAndChallenge pkac;
    SECStatus rv;
    SECItem signedItem;
    PLArenaPool *arena = NULL;
    CERTSignedData sd;
    SECItem sig;
    SECKEYPublicKey *pubKey = NULL;
    unsigned int len;
    
    signedItem.data = NULL;
    
    /* convert the base64 encoded data to binary */
    rv = ATOB_ConvertAsciiToItem(&signedItem, pkacstr);
    if (rv != SECSuccess) {
	goto loser;
    }

    /* create an arena */
    arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
    if (arena == NULL) {
	goto loser;
    }

    /* decode the outer wrapping of signed data */
    PORT_Memset(&sd, 0, sizeof(CERTSignedData));
    rv = SEC_QuickDERDecodeItem(arena, &sd, CERT_SignedDataTemplate, &signedItem );
    if ( rv ) {
	goto loser;
    }

    /* decode the public key and challenge wrapper */
    PORT_Memset(&pkac, 0, sizeof(CERTPublicKeyAndChallenge));
    rv = SEC_QuickDERDecodeItem(arena, &pkac, CERT_PublicKeyAndChallengeTemplate, 
			    &sd.data);
    if ( rv ) {
	goto loser;
    }

    /* decode the subject public key info */
    spki = SECKEY_DecodeDERSubjectPublicKeyInfo(&pkac.spki);
    if ( spki == NULL ) {
	goto loser;
    }
    
    /* get the public key */
    pubKey = seckey_ExtractPublicKey(spki);
    if ( pubKey == NULL ) {
	goto loser;
    }

    /* check the signature */
    sig = sd.signature;
    DER_ConvertBitString(&sig);
    rv = VFY_VerifyDataWithAlgorithmID(sd.data.data, sd.data.len, pubKey, &sig,
			&(sd.signatureAlgorithm), NULL, wincx);
    if ( rv != SECSuccess ) {
	goto loser;
    }
    
    /* check the challenge */
    if ( challenge ) {
	len = PORT_Strlen(challenge);
	/* length is right */
	if ( len != pkac.challenge.len ) {
	    goto loser;
	}
	/* actual data is right */
	if ( PORT_Memcmp(challenge, pkac.challenge.data, len) != 0 ) {
	    goto loser;
	}
    }
    goto done;

loser:
    /* make sure that we return null if we got an error */
    if ( spki ) {
	SECKEY_DestroySubjectPublicKeyInfo(spki);
    }
    spki = NULL;
    
done:
    if ( signedItem.data ) {
	PORT_Free(signedItem.data);
    }
    if ( arena ) {
	PORT_FreeArena(arena, PR_FALSE);
    }
    if ( pubKey ) {
	SECKEY_DestroyPublicKey(pubKey);
    }
    
    return spki;
}

void
SECKEY_DestroyPrivateKeyInfo(SECKEYPrivateKeyInfo *pvk,
			     PRBool freeit)
{
    PLArenaPool *poolp;

    if(pvk != NULL) {
	if(pvk->arena) {
	    poolp = pvk->arena;
	    /* zero structure since PORT_FreeArena does not support
	     * this yet.
	     */
	    PORT_Memset(pvk->privateKey.data, 0, pvk->privateKey.len);
	    PORT_Memset((char *)pvk, 0, sizeof(*pvk));
	    if(freeit == PR_TRUE) {
		PORT_FreeArena(poolp, PR_TRUE);
	    } else {
		pvk->arena = poolp;
	    }
	} else {
	    SECITEM_ZfreeItem(&pvk->version, PR_FALSE);
	    SECITEM_ZfreeItem(&pvk->privateKey, PR_FALSE);
	    SECOID_DestroyAlgorithmID(&pvk->algorithm, PR_FALSE);
	    PORT_Memset((char *)pvk, 0, sizeof(*pvk));
	    if(freeit == PR_TRUE) {
		PORT_Free(pvk);
	    }
	}
    }
}

void
SECKEY_DestroyEncryptedPrivateKeyInfo(SECKEYEncryptedPrivateKeyInfo *epki,
				      PRBool freeit)
{
    PLArenaPool *poolp;

    if(epki != NULL) {
	if(epki->arena) {
	    poolp = epki->arena;
	    /* zero structure since PORT_FreeArena does not support
	     * this yet.
	     */
	    PORT_Memset(epki->encryptedData.data, 0, epki->encryptedData.len);
	    PORT_Memset((char *)epki, 0, sizeof(*epki));
	    if(freeit == PR_TRUE) {
		PORT_FreeArena(poolp, PR_TRUE);
	    } else {
		epki->arena = poolp;
	    }
	} else {
	    SECITEM_ZfreeItem(&epki->encryptedData, PR_FALSE);
	    SECOID_DestroyAlgorithmID(&epki->algorithm, PR_FALSE);
	    PORT_Memset((char *)epki, 0, sizeof(*epki));
	    if(freeit == PR_TRUE) {
		PORT_Free(epki);
	    }
	}
    }
}

SECStatus
SECKEY_CopyPrivateKeyInfo(PLArenaPool *poolp,
			  SECKEYPrivateKeyInfo *to,
			  const SECKEYPrivateKeyInfo *from)
{
    SECStatus rv = SECFailure;

    if((to == NULL) || (from == NULL)) {
	return SECFailure;
    }

    rv = SECOID_CopyAlgorithmID(poolp, &to->algorithm, &from->algorithm);
    if(rv != SECSuccess) {
	return SECFailure;
    }
    rv = SECITEM_CopyItem(poolp, &to->privateKey, &from->privateKey);
    if(rv != SECSuccess) {
	return SECFailure;
    }
    rv = SECITEM_CopyItem(poolp, &to->version, &from->version);

    return rv;
}

SECStatus
SECKEY_CopyEncryptedPrivateKeyInfo(PLArenaPool *poolp,
				   SECKEYEncryptedPrivateKeyInfo *to,
				   const SECKEYEncryptedPrivateKeyInfo *from)
{
    SECStatus rv = SECFailure;

    if((to == NULL) || (from == NULL)) {
	return SECFailure;
    }

    rv = SECOID_CopyAlgorithmID(poolp, &to->algorithm, &from->algorithm);
    if(rv != SECSuccess) {
	return SECFailure;
    }
    rv = SECITEM_CopyItem(poolp, &to->encryptedData, &from->encryptedData);

    return rv;
}

KeyType
SECKEY_GetPrivateKeyType(const SECKEYPrivateKey *privKey)
{
   return privKey->keyType;
}

KeyType
SECKEY_GetPublicKeyType(const SECKEYPublicKey *pubKey)
{
   return pubKey->keyType;
}

SECKEYPublicKey*
SECKEY_ImportDERPublicKey(const SECItem *derKey, CK_KEY_TYPE type)
{
    SECKEYPublicKey *pubk = NULL;
    SECStatus rv = SECFailure;
    SECItem newDerKey;
    PLArenaPool *arena = NULL;

    if (!derKey) {
        return NULL;
    } 

    arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
    if (arena == NULL) {
	PORT_SetError(SEC_ERROR_NO_MEMORY);
        goto finish;
    }

    pubk = PORT_ArenaZNew(arena, SECKEYPublicKey);
    if (pubk == NULL) {
        goto finish;
    }
    pubk->arena = arena;

    rv = SECITEM_CopyItem(pubk->arena, &newDerKey, derKey);
    if (SECSuccess != rv) {
        goto finish;
    }

    pubk->pkcs11Slot = NULL;
    pubk->pkcs11ID = CK_INVALID_HANDLE;

    switch( type ) {
      case CKK_RSA:
	prepare_rsa_pub_key_for_asn1(pubk);
        rv = SEC_QuickDERDecodeItem(pubk->arena, pubk, SECKEY_RSAPublicKeyTemplate, &newDerKey);
        pubk->keyType = rsaKey;
        break;
      case CKK_DSA:
	prepare_dsa_pub_key_for_asn1(pubk);
        rv = SEC_QuickDERDecodeItem(pubk->arena, pubk, SECKEY_DSAPublicKeyTemplate, &newDerKey);
        pubk->keyType = dsaKey;
        break;
      case CKK_DH:
	prepare_dh_pub_key_for_asn1(pubk);
        rv = SEC_QuickDERDecodeItem(pubk->arena, pubk, SECKEY_DHPublicKeyTemplate, &newDerKey);
        pubk->keyType = dhKey;
        break;
      default:
        rv = SECFailure;
        break;
    }

finish:
    if (rv != SECSuccess) {
        if (arena != NULL) {
            PORT_FreeArena(arena, PR_FALSE);
        }
        pubk = NULL;
    }
    return pubk;
}

SECKEYPrivateKeyList*
SECKEY_NewPrivateKeyList(void)
{
    PLArenaPool *arena = NULL;
    SECKEYPrivateKeyList *ret = NULL;

    arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
    if ( arena == NULL ) {
        goto loser;
    }

    ret = (SECKEYPrivateKeyList *)PORT_ArenaZAlloc(arena,
                sizeof(SECKEYPrivateKeyList));
    if ( ret == NULL ) {
        goto loser;
    }

    ret->arena = arena;

    PR_INIT_CLIST(&ret->list);

    return(ret);

loser:
    if ( arena != NULL ) {
        PORT_FreeArena(arena, PR_FALSE);
    }

    return(NULL);
}

void
SECKEY_DestroyPrivateKeyList(SECKEYPrivateKeyList *keys)
{
    while( !PR_CLIST_IS_EMPTY(&keys->list) ) {
        SECKEY_RemovePrivateKeyListNode(
            (SECKEYPrivateKeyListNode*)(PR_LIST_HEAD(&keys->list)) );
    }

    PORT_FreeArena(keys->arena, PR_FALSE);

    return;
}


void
SECKEY_RemovePrivateKeyListNode(SECKEYPrivateKeyListNode *node)
{
    PR_ASSERT(node->key);
    SECKEY_DestroyPrivateKey(node->key);
    node->key = NULL;
    PR_REMOVE_LINK(&node->links);
    return;

}

SECStatus
SECKEY_AddPrivateKeyToListTail( SECKEYPrivateKeyList *list,
                                SECKEYPrivateKey *key)
{
    SECKEYPrivateKeyListNode *node;

    node = (SECKEYPrivateKeyListNode *)PORT_ArenaZAlloc(list->arena,
                sizeof(SECKEYPrivateKeyListNode));
    if ( node == NULL ) {
        goto loser;
    }

    PR_INSERT_BEFORE(&node->links, &list->list);
    node->key = key;
    return(SECSuccess);

loser:
    return(SECFailure);
}


SECKEYPublicKeyList*
SECKEY_NewPublicKeyList(void)
{
    PLArenaPool *arena = NULL;
    SECKEYPublicKeyList *ret = NULL;

    arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
    if ( arena == NULL ) {
        goto loser;
    }

    ret = (SECKEYPublicKeyList *)PORT_ArenaZAlloc(arena,
                sizeof(SECKEYPublicKeyList));
    if ( ret == NULL ) {
        goto loser;
    }

    ret->arena = arena;

    PR_INIT_CLIST(&ret->list);

    return(ret);

loser:
    if ( arena != NULL ) {
        PORT_FreeArena(arena, PR_FALSE);
    }

    return(NULL);
}

void
SECKEY_DestroyPublicKeyList(SECKEYPublicKeyList *keys)
{
    while( !PR_CLIST_IS_EMPTY(&keys->list) ) {
        SECKEY_RemovePublicKeyListNode(
            (SECKEYPublicKeyListNode*)(PR_LIST_HEAD(&keys->list)) );
    }

    PORT_FreeArena(keys->arena, PR_FALSE);

    return;
}


void
SECKEY_RemovePublicKeyListNode(SECKEYPublicKeyListNode *node)
{
    PR_ASSERT(node->key);
    SECKEY_DestroyPublicKey(node->key);
    node->key = NULL;
    PR_REMOVE_LINK(&node->links);
    return;

}

SECStatus
SECKEY_AddPublicKeyToListTail( SECKEYPublicKeyList *list,
                                SECKEYPublicKey *key)
{
    SECKEYPublicKeyListNode *node;

    node = (SECKEYPublicKeyListNode *)PORT_ArenaZAlloc(list->arena,
                sizeof(SECKEYPublicKeyListNode));
    if ( node == NULL ) {
        goto loser;
    }

    PR_INSERT_BEFORE(&node->links, &list->list);
    node->key = key;
    return(SECSuccess);

loser:
    return(SECFailure);
}

#define SECKEY_CacheAttribute(key, attribute) \
    if (CK_TRUE == PK11_HasAttributeSet(key->pkcs11Slot, key->pkcs11ID, attribute, PR_FALSE)) { \
        key->staticflags |= SECKEY_##attribute; \
    } else { \
        key->staticflags &= (~SECKEY_##attribute); \
    }

SECStatus
SECKEY_CacheStaticFlags(SECKEYPrivateKey* key)
{
    SECStatus rv = SECFailure;
    if (key && key->pkcs11Slot && key->pkcs11ID) {
        key->staticflags |= SECKEY_Attributes_Cached;
        SECKEY_CacheAttribute(key, CKA_PRIVATE);
        SECKEY_CacheAttribute(key, CKA_ALWAYS_AUTHENTICATE);
        rv = SECSuccess;
    }
    return rv;
}
