gecko/security/nss/lib/crmf/crmfcont.c

/* -*- Mode: C; tab-width: 8 -*-*/
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the Netscape security libraries.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1994-2000
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
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 * ***** END LICENSE BLOCK ***** */

#include "crmf.h"
#include "crmfi.h"
#include "pk11func.h"
#include "keyhi.h"
#include "secoid.h"

static SECStatus
crmf_modify_control_array (CRMFCertRequest *inCertReq, int count)
{
    if (count > 0) {
        void *dummy = PORT_Realloc(inCertReq->controls, 
				   sizeof(CRMFControl*)*(count+2));
	if (dummy == NULL) {
	    return SECFailure;
	}
	inCertReq->controls = dummy;
    } else {
        inCertReq->controls = PORT_ZNewArray(CRMFControl*, 2);
    }
    return (inCertReq->controls == NULL) ? SECFailure : SECSuccess ;
}

static SECStatus
crmf_add_new_control(CRMFCertRequest *inCertReq,SECOidTag inTag,
		     CRMFControl **destControl)
{
    SECOidData  *oidData;
    SECStatus    rv;
    PRArenaPool *poolp;
    int          numControls = 0;
    CRMFControl *newControl;
    CRMFControl **controls;
    void        *mark;

    poolp = inCertReq->poolp;
    if (poolp == NULL) {
        return SECFailure;
    }
    mark = PORT_ArenaMark(poolp);
    if (inCertReq->controls != NULL) {
        while (inCertReq->controls[numControls] != NULL)
	    numControls++;
    }
    rv = crmf_modify_control_array(inCertReq, numControls);
    if (rv != SECSuccess) {
        goto loser;
    }
    controls = inCertReq->controls;
    oidData = SECOID_FindOIDByTag(inTag);
    newControl = *destControl = PORT_ArenaZNew(poolp,CRMFControl);
    if (newControl == NULL) {
        goto loser;
    }
    rv = SECITEM_CopyItem(poolp, &newControl->derTag, &oidData->oid);
    if (rv != SECSuccess) {
        goto loser;
    }
    newControl->tag = inTag;
    controls[numControls] = newControl;
    controls[numControls+1] = NULL;
    PORT_ArenaUnmark(poolp, mark);
    return SECSuccess;

 loser:
    PORT_ArenaRelease(poolp, mark);
    *destControl = NULL;
    return SECFailure;
			  
}

static SECStatus
crmf_add_secitem_control(CRMFCertRequest *inCertReq, SECItem *value,
			 SECOidTag inTag)
{
    SECStatus    rv;
    CRMFControl *newControl;
    void        *mark;

    rv = crmf_add_new_control(inCertReq, inTag, &newControl);
    if (rv != SECSuccess) {
        return rv;
    }
    mark = PORT_ArenaMark(inCertReq->poolp);
    rv = SECITEM_CopyItem(inCertReq->poolp, &newControl->derValue, value);
    if (rv != SECSuccess) {
        PORT_ArenaRelease(inCertReq->poolp, mark);
	return rv;
    }
    PORT_ArenaUnmark(inCertReq->poolp, mark);
    return SECSuccess;
}

SECStatus
CRMF_CertRequestSetRegTokenControl(CRMFCertRequest *inCertReq, SECItem *value)
{
    return crmf_add_secitem_control(inCertReq, value, 
				    SEC_OID_PKIX_REGCTRL_REGTOKEN);
}

SECStatus
CRMF_CertRequestSetAuthenticatorControl (CRMFCertRequest *inCertReq, 
					 SECItem         *value)
{
    return crmf_add_secitem_control(inCertReq, value, 
				    SEC_OID_PKIX_REGCTRL_AUTHENTICATOR);
}

SECStatus
crmf_destroy_encrypted_value(CRMFEncryptedValue *inEncrValue, PRBool freeit)
{
    if (inEncrValue != NULL) {
        if (inEncrValue->intendedAlg) {
	    SECOID_DestroyAlgorithmID(inEncrValue->intendedAlg, PR_TRUE);
	    inEncrValue->intendedAlg = NULL;
	}
	if (inEncrValue->symmAlg) {
	    SECOID_DestroyAlgorithmID(inEncrValue->symmAlg, PR_TRUE);
	    inEncrValue->symmAlg = NULL;
	}
        if (inEncrValue->encSymmKey.data) {
	    PORT_Free(inEncrValue->encSymmKey.data);
	    inEncrValue->encSymmKey.data = NULL;
	}
	if (inEncrValue->keyAlg) {
	    SECOID_DestroyAlgorithmID(inEncrValue->keyAlg, PR_TRUE);
	    inEncrValue->keyAlg = NULL;
	}
	if (inEncrValue->valueHint.data) {
	    PORT_Free(inEncrValue->valueHint.data);
	    inEncrValue->valueHint.data = NULL;
	}
        if (inEncrValue->encValue.data) {
	    PORT_Free(inEncrValue->encValue.data);
	    inEncrValue->encValue.data = NULL;
	}
	if (freeit) {
	    PORT_Free(inEncrValue);
	}
    }
    return SECSuccess;
}

SECStatus
CRMF_DestroyEncryptedValue(CRMFEncryptedValue *inEncrValue)
{
    return crmf_destroy_encrypted_value(inEncrValue, PR_TRUE);
}

SECStatus
crmf_copy_encryptedvalue_secalg(PRArenaPool     *poolp,
				SECAlgorithmID  *srcAlgId,
				SECAlgorithmID **destAlgId)
{
    SECAlgorithmID *newAlgId;
    SECStatus rv;

    newAlgId = (poolp != NULL) ? PORT_ArenaZNew(poolp, SECAlgorithmID) :
                                 PORT_ZNew(SECAlgorithmID);
    if (newAlgId == NULL) {
        return SECFailure;
    }
    
    rv = SECOID_CopyAlgorithmID(poolp, newAlgId, srcAlgId);
    if (rv != SECSuccess) {
        if (!poolp) {
            SECOID_DestroyAlgorithmID(newAlgId, PR_TRUE);
        }
        return rv;
    }
    *destAlgId = newAlgId;
    
    return rv;
}

SECStatus
crmf_copy_encryptedvalue(PRArenaPool        *poolp,
			 CRMFEncryptedValue *srcValue,
			 CRMFEncryptedValue *destValue)
{
    SECStatus           rv;

    if (srcValue->intendedAlg != NULL) {
        rv = crmf_copy_encryptedvalue_secalg(poolp,
					     srcValue->intendedAlg,
					     &destValue->intendedAlg);
	if (rv != SECSuccess) {
	    goto loser;
	}
    }
    if (srcValue->symmAlg != NULL) {
        rv = crmf_copy_encryptedvalue_secalg(poolp, 
					     srcValue->symmAlg,
					     &destValue->symmAlg);
	if (rv != SECSuccess) {
	    goto loser;
	}
    }
    if (srcValue->encSymmKey.data != NULL) {
        rv = crmf_make_bitstring_copy(poolp, 
				      &destValue->encSymmKey,
				      &srcValue->encSymmKey);
	if (rv != SECSuccess) {
	    goto loser;
	}
    }
    if (srcValue->keyAlg != NULL) {
        rv = crmf_copy_encryptedvalue_secalg(poolp,
					     srcValue->keyAlg,
					     &destValue->keyAlg);
	if (rv != SECSuccess) {
	    goto loser;
	}
    }
    if (srcValue->valueHint.data != NULL) {
        rv = SECITEM_CopyItem(poolp, 
			      &destValue->valueHint,
			      &srcValue->valueHint);
	if (rv != SECSuccess) {
	    goto loser;
	}
    }
    if (srcValue->encValue.data != NULL) {
        rv = crmf_make_bitstring_copy(poolp,
				      &destValue->encValue,
				      &srcValue->encValue);
	if (rv != SECSuccess) {
	    goto loser;
	}
    }
    return SECSuccess;
 loser:
    if (poolp == NULL && destValue != NULL) {
        crmf_destroy_encrypted_value(destValue, PR_FALSE);
    }
    return SECFailure;
}

SECStatus 
crmf_copy_encryptedkey(PRArenaPool       *poolp,
		       CRMFEncryptedKey  *srcEncrKey,
		       CRMFEncryptedKey  *destEncrKey)
{
    SECStatus          rv;
    void              *mark = NULL;

    if (poolp != NULL) {
        mark = PORT_ArenaMark(poolp);
    }

    switch (srcEncrKey->encKeyChoice) {
    case crmfEncryptedValueChoice:
        rv = crmf_copy_encryptedvalue(poolp, 
				      &srcEncrKey->value.encryptedValue,
				      &destEncrKey->value.encryptedValue);
	break;
    case crmfEnvelopedDataChoice:
        destEncrKey->value.envelopedData = 
	    SEC_PKCS7CopyContentInfo(srcEncrKey->value.envelopedData);
        rv = (destEncrKey->value.envelopedData != NULL) ? SECSuccess:
	                                                  SECFailure;
        break;
    default:
        rv = SECFailure;
    }
    if (rv != SECSuccess) {
        goto loser;
    }
    destEncrKey->encKeyChoice = srcEncrKey->encKeyChoice;
    if (mark) {
    	PORT_ArenaUnmark(poolp, mark);
    }
    return SECSuccess;

 loser:
    if (mark) {
        PORT_ArenaRelease(poolp, mark);
    }
    return SECFailure;
}

static CRMFPKIArchiveOptions*
crmf_create_encr_pivkey_option(CRMFEncryptedKey *inEncryptedKey)
{
    CRMFPKIArchiveOptions *newArchOpt;
    SECStatus              rv;

    newArchOpt = PORT_ZNew(CRMFPKIArchiveOptions);
    if (newArchOpt == NULL) {
        goto loser;
    }

    rv = crmf_copy_encryptedkey(NULL, inEncryptedKey,
				&newArchOpt->option.encryptedKey);
    
    if (rv != SECSuccess) {
      goto loser;
    }
    newArchOpt->archOption = crmfEncryptedPrivateKey;
    return newArchOpt;
 loser:
    if (newArchOpt != NULL) {
        CRMF_DestroyPKIArchiveOptions(newArchOpt);
    }
    return NULL;
}

static CRMFPKIArchiveOptions*
crmf_create_keygen_param_option(SECItem *inKeyGenParams)
{
    CRMFPKIArchiveOptions *newArchOptions;
    SECStatus              rv;

    newArchOptions = PORT_ZNew(CRMFPKIArchiveOptions);
    if (newArchOptions == NULL) {
        goto loser;
    }
    newArchOptions->archOption = crmfKeyGenParameters;
    rv = SECITEM_CopyItem(NULL, &newArchOptions->option.keyGenParameters,
			  inKeyGenParams);
    if (rv != SECSuccess) {
        goto loser;
    }
    return newArchOptions;
 loser:
    if (newArchOptions != NULL) {
        CRMF_DestroyPKIArchiveOptions(newArchOptions);
    }
    return NULL;
}

static CRMFPKIArchiveOptions*
crmf_create_arch_rem_gen_privkey(PRBool archiveRemGenPrivKey)
{
    unsigned char          value;
    SECItem               *dummy;
    CRMFPKIArchiveOptions *newArchOptions;

    value = (archiveRemGenPrivKey) ? hexTrue : hexFalse;
    newArchOptions = PORT_ZNew(CRMFPKIArchiveOptions);
    if (newArchOptions == NULL) {
        goto loser;
    }
    dummy = SEC_ASN1EncodeItem(NULL, 
			       &newArchOptions->option.archiveRemGenPrivKey,
			       &value, SEC_ASN1_GET(SEC_BooleanTemplate));
    PORT_Assert (dummy == &newArchOptions->option.archiveRemGenPrivKey);
    if (dummy != &newArchOptions->option.archiveRemGenPrivKey) {
        SECITEM_FreeItem (dummy, PR_TRUE);
	goto loser;
    }
    newArchOptions->archOption = crmfArchiveRemGenPrivKey;
    return newArchOptions;
 loser:
    if (newArchOptions != NULL) {
        CRMF_DestroyPKIArchiveOptions(newArchOptions);
    }
    return NULL;
}

CRMFPKIArchiveOptions*
CRMF_CreatePKIArchiveOptions(CRMFPKIArchiveOptionsType inType, void *data)
{
    CRMFPKIArchiveOptions* retOptions;

    PORT_Assert(data != NULL);
    if (data == NULL) {
        return NULL;
    }
    switch(inType) {
    case crmfEncryptedPrivateKey:
        retOptions = crmf_create_encr_pivkey_option((CRMFEncryptedKey*)data);
	break;
    case crmfKeyGenParameters:
        retOptions = crmf_create_keygen_param_option((SECItem*)data);
	break;
    case crmfArchiveRemGenPrivKey:
        retOptions = crmf_create_arch_rem_gen_privkey(*(PRBool*)data);
	break;
    default:
        retOptions = NULL;
    }
    return retOptions;
}

static SECStatus
crmf_destroy_encrypted_key(CRMFEncryptedKey *inEncrKey, PRBool freeit)
{ 
    PORT_Assert(inEncrKey != NULL);
    if (inEncrKey != NULL) {
        switch (inEncrKey->encKeyChoice){
	case crmfEncryptedValueChoice:
            crmf_destroy_encrypted_value(&inEncrKey->value.encryptedValue, 
					 PR_FALSE);
	    break;
	case crmfEnvelopedDataChoice:
	    SEC_PKCS7DestroyContentInfo(inEncrKey->value.envelopedData);
            break;
        default:
            break;
        }
        if (freeit) {
            PORT_Free(inEncrKey);
        }
    }
    return SECSuccess;
}

SECStatus 
crmf_destroy_pkiarchiveoptions(CRMFPKIArchiveOptions *inArchOptions, 
			       PRBool                 freeit)
{
    PORT_Assert(inArchOptions != NULL);
    if (inArchOptions != NULL) {
        switch (inArchOptions->archOption) {
	case crmfEncryptedPrivateKey:
	    crmf_destroy_encrypted_key(&inArchOptions->option.encryptedKey,
				       PR_FALSE);
	    break;
	case crmfKeyGenParameters:
	case crmfArchiveRemGenPrivKey:
	    /* This is a union, so having a pointer to one is like
	     * having a pointer to both.  
	     */
	    SECITEM_FreeItem(&inArchOptions->option.keyGenParameters, 
			     PR_FALSE);
	    break;
        case crmfNoArchiveOptions:
            break;
	}
	if (freeit) {
	    PORT_Free(inArchOptions);
	}
    }
    return SECSuccess;
}

SECStatus
CRMF_DestroyPKIArchiveOptions(CRMFPKIArchiveOptions *inArchOptions) 
{
    return crmf_destroy_pkiarchiveoptions(inArchOptions, PR_TRUE);
}

static CK_MECHANISM_TYPE
crmf_get_non_pad_mechanism(CK_MECHANISM_TYPE type)
{
    switch (type) {
    case CKM_DES3_CBC_PAD:
        return CKM_DES3_CBC;
    case CKM_CAST5_CBC_PAD:
        return CKM_CAST5_CBC;
    case CKM_DES_CBC_PAD:
        return CKM_DES_CBC;
    case CKM_IDEA_CBC_PAD:
        return CKM_IDEA_CBC;
    case CKM_CAST3_CBC_PAD:
        return CKM_CAST3_CBC;
    case CKM_CAST_CBC_PAD:
        return CKM_CAST_CBC;
    case CKM_RC5_CBC_PAD:
        return CKM_RC5_CBC;
    case CKM_RC2_CBC_PAD:
        return CKM_RC2_CBC;
    case CKM_CDMF_CBC_PAD:
        return CKM_CDMF_CBC;
    }
    return type;
}

static CK_MECHANISM_TYPE
crmf_get_pad_mech_from_tag(SECOidTag oidTag)
{
    CK_MECHANISM_TYPE  mechType;
    SECOidData        *oidData;

    oidData = SECOID_FindOIDByTag(oidTag);
    mechType = (CK_MECHANISM_TYPE)oidData->mechanism;
    return PK11_GetPadMechanism(mechType);
}

static CK_MECHANISM_TYPE
crmf_get_best_privkey_wrap_mechanism(PK11SlotInfo *slot) 
{
    CK_MECHANISM_TYPE privKeyPadMechs[] = { CKM_DES3_CBC_PAD,
					    CKM_CAST5_CBC_PAD,
					    CKM_DES_CBC_PAD,
					    CKM_IDEA_CBC_PAD,
					    CKM_CAST3_CBC_PAD,
					    CKM_CAST_CBC_PAD,
					    CKM_RC5_CBC_PAD,
					    CKM_RC2_CBC_PAD,
					    CKM_CDMF_CBC_PAD };
    int mechCount = sizeof(privKeyPadMechs)/sizeof(privKeyPadMechs[0]);
    int i;

    for (i=0; i < mechCount; i++) {
        if (PK11_DoesMechanism(slot, privKeyPadMechs[i])) {
	    return privKeyPadMechs[i];
	}
    }
    return CKM_INVALID_MECHANISM;
}

CK_MECHANISM_TYPE
CRMF_GetBestWrapPadMechanism(PK11SlotInfo *slot)
{
    return crmf_get_best_privkey_wrap_mechanism(slot);
}

static SECItem*
crmf_get_iv(CK_MECHANISM_TYPE mechType)
{
    int        iv_size = PK11_GetIVLength(mechType);
    SECItem   *iv;
    SECStatus  rv; 

    iv = PORT_ZNew(SECItem);
    if (iv == NULL) {
        return NULL;
    }
    if (iv_size == 0) {
        iv->data = NULL;
	iv->len  = 0;
	return iv;
    }
    iv->data = PORT_NewArray(unsigned char, iv_size);
    if (iv->data == NULL) {
        iv->len = 0;
	return iv;
    }
    iv->len = iv_size;
    rv = PK11_GenerateRandom(iv->data, iv->len);
    if (rv != SECSuccess) {
        PORT_Free(iv->data);
	iv->data = NULL;
	iv->len  = 0;
    }
    return iv;
}

SECItem*
CRMF_GetIVFromMechanism(CK_MECHANISM_TYPE mechType)
{
    return crmf_get_iv(mechType);
}

CK_MECHANISM_TYPE
crmf_get_mechanism_from_public_key(SECKEYPublicKey *inPubKey)
{
    CERTSubjectPublicKeyInfo *spki = NULL;
    SECOidTag                 tag;
    

    spki = SECKEY_CreateSubjectPublicKeyInfo(inPubKey);
    if (spki == NULL) {
        return CKM_INVALID_MECHANISM;
    }
    tag = SECOID_FindOIDTag(&spki->algorithm.algorithm);
    SECKEY_DestroySubjectPublicKeyInfo(spki);
    spki = NULL;
    return PK11_AlgtagToMechanism(tag);
}

SECItem*
crmf_get_public_value(SECKEYPublicKey *pubKey, SECItem *dest)
{
    SECItem *src;

    switch(pubKey->keyType) {
    case dsaKey:
	src =  &pubKey->u.dsa.publicValue;
	break;
    case rsaKey:
	src =  &pubKey->u.rsa.modulus;
	break;
    case dhKey:
	src =  &pubKey->u.dh.publicValue;
	break;
    default:
	src = NULL;
	break;
    }
    if (!src) {
	PORT_SetError(SEC_ERROR_INVALID_ARGS);
	return NULL;
    }

    if (dest != NULL) {
	SECStatus rv = SECITEM_CopyItem(NULL, dest, src);
	if (rv != SECSuccess) {
	    dest = NULL;
	}
    } else {
        dest = SECITEM_ArenaDupItem(NULL, src);
    }
    return dest;
}

static SECItem*
crmf_decode_params(SECItem *inParams)
{
    SECItem     *params;
    SECStatus    rv      = SECFailure;
    PRArenaPool *poolp;

    poolp = PORT_NewArena(CRMF_DEFAULT_ARENA_SIZE);
    if (poolp == NULL) {
        return NULL;
    }
    
    params = PORT_ArenaZNew(poolp, SECItem);
    if (params) {
	rv = SEC_ASN1DecodeItem(poolp, params, 
				SEC_ASN1_GET(SEC_OctetStringTemplate),
				inParams);
    }
    params = (rv == SECSuccess) ? SECITEM_ArenaDupItem(NULL, params) : NULL;
    PORT_FreeArena(poolp, PR_FALSE);
    return params;
}

static int
crmf_get_key_size_from_mech(CK_MECHANISM_TYPE mechType)
{
    CK_MECHANISM_TYPE keyGen = PK11_GetKeyGen(mechType);

    switch (keyGen) {
    case CKM_CDMF_KEY_GEN:
    case CKM_DES_KEY_GEN:
        return 8;
    case CKM_DES2_KEY_GEN:
	return 16;
    case CKM_DES3_KEY_GEN:
	return 24;
    }
    return 0;
}

SECStatus
crmf_encrypted_value_unwrap_priv_key(PRArenaPool        *poolp,
				     CRMFEncryptedValue *encValue,
				     SECKEYPrivateKey   *privKey,
				     SECKEYPublicKey    *newPubKey,
				     SECItem            *nickname,
				     PK11SlotInfo       *slot,
				     unsigned char       keyUsage,
				     SECKEYPrivateKey  **unWrappedKey,
				     void               *wincx)
{
    PK11SymKey        *wrappingKey = NULL;
    CK_MECHANISM_TYPE  wrapMechType;
    SECOidTag          oidTag;
    SECItem           *params = NULL, *publicValue = NULL;
    int                keySize, origLen;
    CK_KEY_TYPE        keyType;
    CK_ATTRIBUTE_TYPE *usage = NULL;
    CK_ATTRIBUTE_TYPE rsaUsage[] = {
      CKA_UNWRAP, CKA_DECRYPT, CKA_SIGN, CKA_SIGN_RECOVER };
    CK_ATTRIBUTE_TYPE dsaUsage[] = { CKA_SIGN };
    CK_ATTRIBUTE_TYPE dhUsage[] = { CKA_DERIVE };
    int usageCount = 0;

    oidTag = SECOID_GetAlgorithmTag(encValue->symmAlg);
    wrapMechType = crmf_get_pad_mech_from_tag(oidTag);
    keySize = crmf_get_key_size_from_mech(wrapMechType);
    wrappingKey = PK11_PubUnwrapSymKey(privKey, &encValue->encSymmKey, 
				       wrapMechType, CKA_UNWRAP, keySize);
    if (wrappingKey == NULL) {
        goto loser;
    }/* Make the length a byte length instead of bit length*/
    params = (encValue->symmAlg != NULL) ? 
              crmf_decode_params(&encValue->symmAlg->parameters) : NULL;
    origLen = encValue->encValue.len;
    encValue->encValue.len = CRMF_BITS_TO_BYTES(origLen);
    publicValue = crmf_get_public_value(newPubKey, NULL);
    switch(newPubKey->keyType) {
    default:
    case rsaKey:
        keyType = CKK_RSA;
        switch  (keyUsage & (KU_KEY_ENCIPHERMENT|KU_DIGITAL_SIGNATURE)) {
        case KU_KEY_ENCIPHERMENT:
            usage = rsaUsage;
            usageCount = 2;
            break;
        case KU_DIGITAL_SIGNATURE:
            usage = &rsaUsage[2];
            usageCount = 2;
            break;
        case KU_KEY_ENCIPHERMENT|KU_DIGITAL_SIGNATURE:
        case 0: /* default to everything */
            usage = rsaUsage;
            usageCount = 4;
            break;
        }
	break;
    case dhKey:
        keyType = CKK_DH;
        usage = dhUsage;
        usageCount = sizeof(dhUsage)/sizeof(dhUsage[0]);
        break;
    case dsaKey:
        keyType = CKK_DSA;
        usage = dsaUsage;
        usageCount = sizeof(dsaUsage)/sizeof(dsaUsage[0]);
        break;
    }
    PORT_Assert(usage != NULL);
    PORT_Assert(usageCount != 0);
    *unWrappedKey = PK11_UnwrapPrivKey(slot, wrappingKey, wrapMechType, params,
				       &encValue->encValue, nickname,
				       publicValue, PR_TRUE,PR_TRUE, 
				       keyType, usage, usageCount, wincx);
    encValue->encValue.len = origLen;
    if (*unWrappedKey == NULL) {
        goto loser;
    }
    SECITEM_FreeItem (publicValue, PR_TRUE);
    if (params!= NULL) {
        SECITEM_FreeItem(params, PR_TRUE);
    } 
    PK11_FreeSymKey(wrappingKey);
    return SECSuccess;
 loser:
    *unWrappedKey = NULL;
    return SECFailure;
}

CRMFEncryptedValue *
crmf_create_encrypted_value_wrapped_privkey(SECKEYPrivateKey   *inPrivKey,
					    SECKEYPublicKey    *inCAKey,
					    CRMFEncryptedValue *destValue)
{
    SECItem                   wrappedPrivKey, wrappedSymKey;
    SECItem                   encodedParam, *dummy;
    SECStatus                 rv;
    CK_MECHANISM_TYPE         pubMechType, symKeyType;
    unsigned char            *wrappedSymKeyBits;
    unsigned char            *wrappedPrivKeyBits;
    SECItem                  *iv = NULL;
    SECOidTag                 tag;
    PK11SymKey               *symKey;
    PK11SlotInfo             *slot;
    SECAlgorithmID           *symmAlg;
    CRMFEncryptedValue       *myEncrValue = NULL;

    encodedParam.data = NULL;
    wrappedSymKeyBits  = PORT_NewArray(unsigned char, MAX_WRAPPED_KEY_LEN);
    wrappedPrivKeyBits = PORT_NewArray(unsigned char, MAX_WRAPPED_KEY_LEN);
    if (wrappedSymKeyBits == NULL || wrappedPrivKeyBits == NULL) {
        goto loser;
    }
    if (destValue == NULL) {
        myEncrValue = destValue = PORT_ZNew(CRMFEncryptedValue);
	if (destValue == NULL) {
	    goto loser;
	}
    }

    pubMechType = crmf_get_mechanism_from_public_key(inCAKey);
    if (pubMechType == CKM_INVALID_MECHANISM) {
        /* XXX I should probably do something here for non-RSA 
	 *     keys that are in certs. (ie DSA)
	 * XXX or at least SET AN ERROR CODE.
	 */
        goto loser;
    }
    slot = inPrivKey->pkcs11Slot; 
    PORT_Assert(slot != NULL);
    symKeyType = crmf_get_best_privkey_wrap_mechanism(slot);
    symKey = PK11_KeyGen(slot, symKeyType, NULL, 0, NULL);
    if (symKey == NULL) {
        goto loser;
    }

    wrappedSymKey.data = wrappedSymKeyBits;
    wrappedSymKey.len  = MAX_WRAPPED_KEY_LEN;
    rv = PK11_PubWrapSymKey(pubMechType, inCAKey, symKey, &wrappedSymKey);
    if (rv != SECSuccess) {
        goto loser;
    }
    /* Make the length of the result a Bit String length. */
    wrappedSymKey.len <<= 3;

    wrappedPrivKey.data = wrappedPrivKeyBits;
    wrappedPrivKey.len  = MAX_WRAPPED_KEY_LEN;
    iv = crmf_get_iv(symKeyType);
    rv = PK11_WrapPrivKey(slot, symKey, inPrivKey, symKeyType, iv, 
			  &wrappedPrivKey, NULL);
    PK11_FreeSymKey(symKey);
    if (rv != SECSuccess) {
        goto loser;
    }
    /* Make the length of the result a Bit String length. */
    wrappedPrivKey.len <<= 3;
    rv = crmf_make_bitstring_copy(NULL, 
				  &destValue->encValue, 
				  &wrappedPrivKey);
    if (rv != SECSuccess) {
        goto loser;
    }

    rv = crmf_make_bitstring_copy(NULL,
				  &destValue->encSymmKey, 
				  &wrappedSymKey);
    if (rv != SECSuccess) {
        goto loser;
    }
    destValue->symmAlg = symmAlg = PORT_ZNew(SECAlgorithmID);
    if (symmAlg == NULL) {
        goto loser;
    }

    dummy = SEC_ASN1EncodeItem(NULL, &encodedParam, iv, 
                               SEC_ASN1_GET(SEC_OctetStringTemplate));
    if (dummy != &encodedParam) {
        SECITEM_FreeItem(dummy, PR_TRUE);
	goto loser;
    }

    symKeyType = crmf_get_non_pad_mechanism(symKeyType);
    tag = PK11_MechanismToAlgtag(symKeyType);
    rv = SECOID_SetAlgorithmID(NULL, symmAlg, tag, &encodedParam);
    if (rv != SECSuccess) {
        goto loser;
    }
    SECITEM_FreeItem(&encodedParam, PR_FALSE);
    PORT_Free(wrappedPrivKeyBits);
    PORT_Free(wrappedSymKeyBits);
    SECITEM_FreeItem(iv, PR_TRUE);
    return destValue;
 loser:
    if (iv != NULL) {
	SECITEM_FreeItem(iv, PR_TRUE);
    }
    if (myEncrValue != NULL) {
        crmf_destroy_encrypted_value(myEncrValue, PR_TRUE);
    }
    if (wrappedSymKeyBits != NULL) {
        PORT_Free(wrappedSymKeyBits);
    }
    if (wrappedPrivKeyBits != NULL) {
        PORT_Free(wrappedPrivKeyBits);
    }
    if (encodedParam.data != NULL) {
	SECITEM_FreeItem(&encodedParam, PR_FALSE);
    }
    return NULL;
}

CRMFEncryptedKey*
CRMF_CreateEncryptedKeyWithEncryptedValue (SECKEYPrivateKey *inPrivKey,
					   CERTCertificate  *inCACert)
{
    SECKEYPublicKey          *caPubKey = NULL;
    CRMFEncryptedKey         *encKey = NULL;
    CRMFEncryptedValue       *dummy;

    PORT_Assert(inPrivKey != NULL && inCACert != NULL);
    if (inPrivKey == NULL || inCACert == NULL) {
        return NULL;
    }

    caPubKey = CERT_ExtractPublicKey(inCACert);
    if (caPubKey == NULL) {
        goto loser;
    }

    encKey = PORT_ZNew(CRMFEncryptedKey);
    if (encKey == NULL) {
        goto loser;
    }
    dummy = crmf_create_encrypted_value_wrapped_privkey(inPrivKey,
							caPubKey,
					       &encKey->value.encryptedValue);
    PORT_Assert(dummy == &encKey->value.encryptedValue);
    /* We won't add the der value here, but rather when it 
     * becomes part of a certificate request.
     */
    SECKEY_DestroyPublicKey(caPubKey);
    encKey->encKeyChoice = crmfEncryptedValueChoice;
    return encKey;
 loser:
    if (encKey != NULL) {
        CRMF_DestroyEncryptedKey(encKey);
    }
    if (caPubKey != NULL) {
        SECKEY_DestroyPublicKey(caPubKey);
    }
    return NULL;
}

SECStatus
CRMF_DestroyEncryptedKey(CRMFEncryptedKey *inEncrKey)
{
    return crmf_destroy_encrypted_key(inEncrKey, PR_TRUE);
}

SECStatus
crmf_copy_pkiarchiveoptions(PRArenaPool           *poolp,
			    CRMFPKIArchiveOptions *destOpt,
			    CRMFPKIArchiveOptions *srcOpt)
{
    SECStatus rv;
    destOpt->archOption = srcOpt->archOption;
    switch (srcOpt->archOption) {
    case crmfEncryptedPrivateKey:
        rv = crmf_copy_encryptedkey(poolp,
				    &srcOpt->option.encryptedKey,
				    &destOpt->option.encryptedKey);
        break;
    case crmfKeyGenParameters:
    case crmfArchiveRemGenPrivKey:
        /* We've got a union, so having a pointer to one is just
	 * like having a pointer to the other one.
	 */
        rv = SECITEM_CopyItem(poolp, 
			      &destOpt->option.keyGenParameters,
			      &srcOpt->option.keyGenParameters);
	break;
    default:
        rv = SECFailure;
    }
    return rv;
}

static SECStatus
crmf_check_and_adjust_archoption(CRMFControl *inControl)
{
    CRMFPKIArchiveOptions *options;

    options = &inControl->value.archiveOptions;
    if (options->archOption == crmfNoArchiveOptions) {
        /* It hasn't been set, so figure it out from the 
	 * der.
	 */
        switch (inControl->derValue.data[0] & 0x0f) {
	case 0:
	    options->archOption = crmfEncryptedPrivateKey;
	    break;
	case 1:
	    options->archOption = crmfKeyGenParameters;
	    break;
	case 2:
	    options->archOption = crmfArchiveRemGenPrivKey;
	    break;
	default:
	    /* We've got bad DER.  Return an error. */
	    return SECFailure;
	}
    }
    return SECSuccess;
}

static const SEC_ASN1Template *
crmf_get_pkiarchive_subtemplate(CRMFControl *inControl)
{
    const SEC_ASN1Template *retTemplate;
    SECStatus               rv;
    /*
     * We could be in the process of decoding, in which case the
     * archOption field will not be set.  Let's check it and set 
     * it accordingly.
     */

    rv = crmf_check_and_adjust_archoption(inControl);
    if (rv != SECSuccess) {
        return NULL;
    }

    switch (inControl->value.archiveOptions.archOption) {
    case crmfEncryptedPrivateKey:
        retTemplate = CRMFEncryptedKeyWithEncryptedValueTemplate;
	inControl->value.archiveOptions.option.encryptedKey.encKeyChoice =
	  crmfEncryptedValueChoice;
	break;
    default:
        retTemplate = NULL;
    }
    return retTemplate;
}

const SEC_ASN1Template*
crmf_get_pkiarchiveoptions_subtemplate(CRMFControl *inControl)
{
    const SEC_ASN1Template *retTemplate;

    switch (inControl->tag) {
    case SEC_OID_PKIX_REGCTRL_REGTOKEN:
    case SEC_OID_PKIX_REGCTRL_AUTHENTICATOR:
        retTemplate = SEC_ASN1_GET(SEC_UTF8StringTemplate);
	break;
    case SEC_OID_PKIX_REGCTRL_PKI_ARCH_OPTIONS:
        retTemplate = crmf_get_pkiarchive_subtemplate(inControl);
	break;
    case SEC_OID_PKIX_REGCTRL_PKIPUBINFO:
    case SEC_OID_PKIX_REGCTRL_OLD_CERT_ID:
    case SEC_OID_PKIX_REGCTRL_PROTOCOL_ENC_KEY:
        /* We don't support these controls, so we fail for now.*/
        retTemplate = NULL;
	break;
    default:
        retTemplate = NULL;
    }
    return retTemplate;
}

static SECStatus
crmf_encode_pkiarchiveoptions(PRArenaPool *poolp, CRMFControl *inControl)
{
    const SEC_ASN1Template *asn1Template;

    asn1Template = crmf_get_pkiarchiveoptions_subtemplate(inControl);
    /* We've got a union, so passing a pointer to one element of the 
     * union, is the same as passing a pointer to any of the other
     * members of the union.
     */
    SEC_ASN1EncodeItem(poolp, &inControl->derValue,
                       &inControl->value.archiveOptions, asn1Template);

    if (inControl->derValue.data == NULL) {
        goto loser;
    }
    return SECSuccess;
 loser:
    return SECFailure;
}

SECStatus
CRMF_CertRequestSetPKIArchiveOptions(CRMFCertRequest       *inCertReq,
				     CRMFPKIArchiveOptions *inOptions)
{
    CRMFControl *newControl;
    PRArenaPool *poolp;
    SECStatus    rv;
    void        *mark;
    
    PORT_Assert(inCertReq != NULL && inOptions != NULL);
    if (inCertReq == NULL || inOptions == NULL) {
        return SECFailure;
    }
    poolp = inCertReq->poolp;
    mark = PORT_ArenaMark(poolp);
    rv = crmf_add_new_control(inCertReq, 
			      SEC_OID_PKIX_REGCTRL_PKI_ARCH_OPTIONS,
			      &newControl);
    if (rv != SECSuccess) {
        goto loser;
    }

    rv = crmf_copy_pkiarchiveoptions(poolp, 
				     &newControl->value.archiveOptions,
				     inOptions);
    if (rv != SECSuccess) {
        goto loser;
    }

    rv = crmf_encode_pkiarchiveoptions(poolp, newControl); 
    if (rv != SECSuccess) {
        goto loser;
    }
    PORT_ArenaUnmark(poolp, mark);
    return SECSuccess;
 loser:
    PORT_ArenaRelease(poolp, mark);
    return SECFailure;
}

static SECStatus
crmf_destroy_control(CRMFControl *inControl, PRBool freeit)
{
    PORT_Assert(inControl != NULL);
    if (inControl != NULL) {
        SECITEM_FreeItem(&inControl->derTag, PR_FALSE);
        SECITEM_FreeItem(&inControl->derValue, PR_FALSE);
	/* None of the other tags require special processing at 
	 * the moment when freeing because they are not supported,
	 * but if/when they are, add the necessary routines here.  
	 * If all controls are supported, then every member of the 
	 * union inControl->value will have a case that deals with 
	 * it in the following switch statement.
	 */
	switch (inControl->tag) {
	case SEC_OID_PKIX_REGCTRL_PKI_ARCH_OPTIONS:
	    crmf_destroy_pkiarchiveoptions(&inControl->value.archiveOptions,
					   PR_FALSE);
	    break;
        default:
           /* Put this here to get rid of all those annoying warnings.*/
           break;
	}
	if (freeit) {
	    PORT_Free(inControl);
	}
    }
    return SECSuccess;
}

SECStatus
CRMF_DestroyControl(CRMFControl *inControl)
{
    return crmf_destroy_control(inControl, PR_TRUE);
}

static SECOidTag
crmf_controltype_to_tag(CRMFControlType inControlType)
{
    SECOidTag retVal;

    switch(inControlType) {
    case crmfRegTokenControl:
      retVal = SEC_OID_PKIX_REGCTRL_REGTOKEN; 
      break;
    case crmfAuthenticatorControl:
      retVal = SEC_OID_PKIX_REGCTRL_AUTHENTICATOR;
      break;
    case crmfPKIPublicationInfoControl:
      retVal = SEC_OID_PKIX_REGCTRL_PKIPUBINFO;
      break;
    case crmfPKIArchiveOptionsControl:
      retVal = SEC_OID_PKIX_REGCTRL_PKI_ARCH_OPTIONS;
      break;
    case crmfOldCertIDControl:
      retVal = SEC_OID_PKIX_REGCTRL_OLD_CERT_ID;
      break;
    case crmfProtocolEncrKeyControl:
      retVal = SEC_OID_PKIX_REGCTRL_PROTOCOL_ENC_KEY;
      break;
    default:
      retVal = SEC_OID_UNKNOWN;
      break;
    }
    return retVal;
}

PRBool
CRMF_CertRequestIsControlPresent(CRMFCertRequest *inCertReq,
				 CRMFControlType  inControlType)
{
    SECOidTag controlTag;
    int       i;

    PORT_Assert(inCertReq != NULL);
    if (inCertReq == NULL || inCertReq->controls == NULL) {
        return PR_FALSE;
    }
    controlTag = crmf_controltype_to_tag(inControlType);
    for (i=0; inCertReq->controls[i] != NULL; i++) {
        if (inCertReq->controls[i]->tag == controlTag) {
	    return PR_TRUE;
	}
    }
    return PR_FALSE;
}