libkmf/common/csrcrlop.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 *
 * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <stdio.h>
#include <link.h>
#include <fcntl.h>
#include <ctype.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>

#include <ber_der.h>
#include <kmfapiP.h>

#include <pem_encode.h>
#include <libgen.h>
#include <cryptoutil.h>

static KMF_RETURN
setup_crl_call(KMF_HANDLE_T, int, KMF_ATTRIBUTE *, KMF_PLUGIN **);

/*
 *
 * Name: kmf_set_csr_pubkey
 *
 * Description:
 *   This function converts the specified plugin public key to SPKI form,
 *   and save it in the KMF_CSR_DATA internal structure
 *
 * Parameters:
 *   KMFkey(input) - pointer to the KMF_KEY_HANDLE structure containing the
 *      public key generated by the plug-in CreateKeypair
 *   Csr(input/output) - pointer to a KMF_CSR_DATA structure containing
 *      SPKI
 *
 * Returns:
 *   A KMF_RETURN value indicating success or specifying a particular
 *   error condition.
 *   The value KMF_OK indicates success. All other values represent
 *   an error condition.
 *
 */
KMF_RETURN
kmf_set_csr_pubkey(KMF_HANDLE_T handle,
    KMF_KEY_HANDLE *KMFKey,
    KMF_CSR_DATA *Csr)
{
    KMF_RETURN ret;
    KMF_X509_SPKI *spki_ptr;
    KMF_PLUGIN *plugin;
    KMF_DATA KeyData = { 0, NULL };

    CLEAR_ERROR(handle, ret);
    if (ret != KMF_OK)
        return (ret);

    if (KMFKey == NULL || Csr == NULL) {
        return (KMF_ERR_BAD_PARAMETER);
    }

    /* The keystore must extract the pubkey data */
    plugin = FindPlugin(handle, KMFKey->kstype);
    if (plugin != NULL && plugin->funclist->EncodePubkeyData != NULL) {
        ret = plugin->funclist->EncodePubkeyData(handle,
            KMFKey, &KeyData);
    } else {
        return (KMF_ERR_PLUGIN_NOTFOUND);
    }

    spki_ptr = &Csr->csr.subjectPublicKeyInfo;

    ret = DerDecodeSPKI(&KeyData, spki_ptr);

    kmf_free_data(&KeyData);

    return (ret);
}

KMF_RETURN
kmf_set_csr_version(KMF_CSR_DATA *CsrData, uint32_t version)
{
    if (CsrData == NULL)
        return (KMF_ERR_BAD_PARAMETER);

    /*
     * From RFC 3280:
     * Version  ::=  INTEGER  {  v1(0), v2(1), v3(2)  }
     */
    if (version != 0 && version != 1 && version != 2)
        return (KMF_ERR_BAD_PARAMETER);
    return (set_integer(&CsrData->csr.version, (void *)&version,
        sizeof (uint32_t)));
}

KMF_RETURN
kmf_set_csr_subject(KMF_CSR_DATA *CsrData,
    KMF_X509_NAME *subject_name_ptr)
{
    KMF_RETURN rv = KMF_OK;
    KMF_X509_NAME *temp_name_ptr = NULL;

    if (CsrData != NULL && subject_name_ptr != NULL) {
        rv = CopyRDN(subject_name_ptr, &temp_name_ptr);
        if (rv == KMF_OK) {
            CsrData->csr.subject = *temp_name_ptr;
        }
    } else {
        return (KMF_ERR_BAD_PARAMETER);
    }
    return (rv);
}
KMF_RETURN
kmf_create_csr_file(KMF_DATA *csrdata, KMF_ENCODE_FORMAT format,
    char *csrfile)
{
    KMF_RETURN rv = KMF_OK;
    int fd = -1;
    KMF_DATA pemdata = { 0, NULL };

    if (csrdata == NULL || csrfile == NULL)
        return (KMF_ERR_BAD_PARAMETER);

    if (format != KMF_FORMAT_PEM && format != KMF_FORMAT_ASN1)
        return (KMF_ERR_BAD_PARAMETER);

    if (format == KMF_FORMAT_PEM) {
        int len;
        rv = kmf_der_to_pem(KMF_CSR,
            csrdata->Data, csrdata->Length,
            &pemdata.Data, &len);
        if (rv != KMF_OK)
            goto cleanup;
        pemdata.Length = (size_t)len;
    }

    if ((fd = open(csrfile, O_CREAT |O_RDWR, 0644)) == -1) {
        rv = KMF_ERR_OPEN_FILE;
        goto cleanup;
    }

    if (format == KMF_FORMAT_PEM) {
        if (write(fd, pemdata.Data, pemdata.Length) !=
            pemdata.Length) {
            rv = KMF_ERR_WRITE_FILE;
        }
    } else {
        if (write(fd, csrdata->Data, csrdata->Length) !=
            csrdata->Length) {
            rv = KMF_ERR_WRITE_FILE;
        }
    }

cleanup:
    if (fd != -1)
        (void) close(fd);

    kmf_free_data(&pemdata);

    return (rv);
}

KMF_RETURN
kmf_set_csr_extn(KMF_CSR_DATA *Csr, KMF_X509_EXTENSION *extn)
{
    KMF_RETURN ret = KMF_OK;
    KMF_X509_EXTENSIONS *exts;

    if (Csr == NULL || extn == NULL)
        return (KMF_ERR_BAD_PARAMETER);

    exts = &Csr->csr.extensions;

    ret = add_an_extension(exts, extn);

    return (ret);
}

KMF_RETURN
kmf_set_csr_sig_alg(KMF_CSR_DATA *CsrData,
    KMF_ALGORITHM_INDEX sigAlg)
{
    KMF_OID *alg;

    if (CsrData == NULL)
        return (KMF_ERR_BAD_PARAMETER);

    alg = x509_algid_to_algoid(sigAlg);

    if (alg != NULL) {
        (void) copy_data((KMF_DATA *)
            &CsrData->signature.algorithmIdentifier.algorithm,
            (KMF_DATA *)alg);
        (void) copy_data(
            &CsrData->signature.algorithmIdentifier.parameters,
            &CsrData->csr.subjectPublicKeyInfo.algorithm.parameters);
    } else {
        return (KMF_ERR_BAD_PARAMETER);
    }
    return (KMF_OK);
}

KMF_RETURN
kmf_set_csr_subject_altname(KMF_CSR_DATA *Csr,
    char *altname, int critical,
    KMF_GENERALNAMECHOICES alttype)
{
    KMF_RETURN ret = KMF_OK;

    if (Csr == NULL || altname == NULL)
        return (KMF_ERR_BAD_PARAMETER);

    ret = kmf_set_altname(&Csr->csr.extensions,
        (KMF_OID *)&KMFOID_SubjectAltName, critical, alttype,
        altname);

    return (ret);
}

KMF_RETURN
kmf_set_csr_ku(KMF_CSR_DATA *CSRData,
    int critical, uint16_t kubits)
{
    KMF_RETURN ret = KMF_OK;

    if (CSRData == NULL)
        return (KMF_ERR_BAD_PARAMETER);

    ret = set_key_usage_extension(
        &CSRData->csr.extensions, critical, kubits);

    return (ret);
}

KMF_RETURN
kmf_add_csr_eku(KMF_CSR_DATA *CSRData, KMF_OID *ekuOID,
    int critical)
{
    KMF_RETURN ret = KMF_OK;
    KMF_X509_EXTENSION *foundextn;
    KMF_X509_EXTENSION newextn;
    BerElement *asn1 = NULL;
    BerValue *extdata = NULL;
    char *olddata = NULL;
    size_t oldsize = 0;
    KMF_X509EXT_EKU ekudata;

    if (CSRData == NULL || ekuOID == NULL)
        return (KMF_ERR_BAD_PARAMETER);

    (void) memset(&ekudata, 0, sizeof (KMF_X509EXT_EKU));
    (void) memset(&newextn, 0, sizeof (newextn));

    foundextn = FindExtn(&CSRData->csr.extensions,
        (KMF_OID *)&KMFOID_ExtendedKeyUsage);
    if (foundextn != NULL) {
        ret = GetSequenceContents((char *)foundextn->BERvalue.Data,
            foundextn->BERvalue.Length, &olddata, &oldsize);
        if (ret != KMF_OK)
            goto out;

        /*
         * If the EKU is already in the cert, then just return OK.
         */
        ret = parse_eku_data(&foundextn->BERvalue, &ekudata);
        if (ret == KMF_OK) {
            if (is_eku_present(&ekudata, ekuOID)) {
                goto out;
            }
        }
    }
    if ((asn1 = kmfder_alloc()) == NULL)
        return (KMF_ERR_MEMORY);

    if (kmfber_printf(asn1, "{") == -1) {
        ret = KMF_ERR_ENCODING;
        goto out;
    }

    /* Write the old extension data first */
    if (olddata != NULL && oldsize > 0) {
        if (kmfber_write(asn1, olddata, oldsize, 0) == -1) {
            ret = KMF_ERR_ENCODING;
            goto out;
        }
    }

    /* Append this EKU OID and close the sequence */
    if (kmfber_printf(asn1, "D}", ekuOID) == -1) {
        ret = KMF_ERR_ENCODING;
        goto out;
    }

    if (kmfber_flatten(asn1, &extdata) == -1) {
        ret = KMF_ERR_ENCODING;
        goto out;
    }

    /*
     * If we are just adding to an existing list of EKU OIDs,
     * just replace the BER data associated with the found extension.
     */
    if (foundextn != NULL) {
        free(foundextn->BERvalue.Data);
        foundextn->critical = critical;
        foundextn->BERvalue.Data = (uchar_t *)extdata->bv_val;
        foundextn->BERvalue.Length = extdata->bv_len;
    } else {
        ret = copy_data(&newextn.extnId,
            (KMF_DATA *)&KMFOID_ExtendedKeyUsage);
        if (ret != KMF_OK)
            goto out;
        newextn.critical = critical;
        newextn.format = KMF_X509_DATAFORMAT_ENCODED;
        newextn.BERvalue.Data = (uchar_t *)extdata->bv_val;
        newextn.BERvalue.Length = extdata->bv_len;
        ret = kmf_set_csr_extn(CSRData, &newextn);
        if (ret != KMF_OK)
            free(newextn.BERvalue.Data);
    }

out:
    kmf_free_eku(&ekudata);
    if (extdata != NULL)
        free(extdata);

    if (olddata != NULL)
        free(olddata);

    if (asn1 != NULL)
        kmfber_free(asn1, 1);

    if (ret != KMF_OK)
        kmf_free_data(&newextn.extnId);

    return (ret);
}

static KMF_RETURN
sign_csr(KMF_HANDLE_T handle,
    const KMF_DATA *SubjectCsr,
    KMF_KEY_HANDLE  *Signkey,
    KMF_X509_ALGORITHM_IDENTIFIER *algo,
    KMF_DATA    *SignedCsr)
{
    KMF_CSR_DATA    subj_csr;
    KMF_TBS_CSR *tbs_csr = NULL;
    KMF_DATA    signed_data = { 0, NULL };
    KMF_RETURN  ret = KMF_OK;
    KMF_ATTRIBUTE   attlist[5];
    KMF_ALGORITHM_INDEX algid;
    int i = 0;

    if (!SignedCsr)
        return (KMF_ERR_BAD_PARAMETER);

    SignedCsr->Length = 0;
    SignedCsr->Data = NULL;

    if (!SubjectCsr)
        return (KMF_ERR_BAD_PARAMETER);

    if (!SubjectCsr->Data || !SubjectCsr->Length)
        return (KMF_ERR_BAD_PARAMETER);

    (void) memset(&subj_csr, 0, sizeof (subj_csr));
    /* Estimate the signed data length generously */
    signed_data.Length = SubjectCsr->Length*2;
    signed_data.Data = calloc(1, signed_data.Length);
    if (!signed_data.Data) {
        ret = KMF_ERR_MEMORY;
        goto cleanup;
    }

    kmf_set_attr_at_index(attlist, i++,
        KMF_KEYSTORE_TYPE_ATTR, &Signkey->kstype,
        sizeof (Signkey->kstype));

    kmf_set_attr_at_index(attlist, i++,
        KMF_KEY_HANDLE_ATTR, Signkey, sizeof (KMF_KEY_HANDLE));

    kmf_set_attr_at_index(attlist, i++, KMF_OID_ATTR, &algo->algorithm,
        sizeof (KMF_OID));

    kmf_set_attr_at_index(attlist, i++, KMF_DATA_ATTR,
        (KMF_DATA *)SubjectCsr, sizeof (KMF_DATA));

    kmf_set_attr_at_index(attlist, i++, KMF_OUT_DATA_ATTR,
        &signed_data, sizeof (KMF_DATA));

    ret = kmf_sign_data(handle, i, attlist);
    if (KMF_OK != ret)
        goto cleanup;
    /*
     * If we got here OK, decode into a structure and then re-encode
     * the complete CSR.
     */
    ret = DerDecodeTbsCsr(SubjectCsr, &tbs_csr);
    if (ret)
        goto cleanup;

    (void) memcpy(&subj_csr.csr, tbs_csr, sizeof (KMF_TBS_CSR));

    ret = copy_algoid(&subj_csr.signature.algorithmIdentifier, algo);
    if (ret)
        goto cleanup;

    algid = x509_algoid_to_algid(&algo->algorithm);
    if (algid == KMF_ALGID_SHA1WithDSA ||
        algid == KMF_ALGID_SHA256WithDSA ||
        algid == KMF_ALGID_SHA1WithECDSA ||
        algid == KMF_ALGID_SHA256WithECDSA ||
        algid == KMF_ALGID_SHA384WithECDSA ||
        algid == KMF_ALGID_SHA512WithECDSA) {
        /*
         * For DSA and ECDSA, we must encode the
         * signature correctly.
         */
        KMF_DATA signature;

        ret = DerEncodeDSASignature(&signed_data, &signature);
        kmf_free_data(&signed_data);

        if (ret != KMF_OK)
            goto cleanup;

        subj_csr.signature.encrypted = signature;
    } else {
        subj_csr.signature.encrypted = signed_data;
    }

    /* Now, re-encode the CSR with the new signature */
    ret = DerEncodeSignedCsr(&subj_csr, SignedCsr);
    if (ret != KMF_OK) {
        kmf_free_data(SignedCsr);
        goto cleanup;
    }

    /* Cleanup & return */
cleanup:
    free(tbs_csr);

    kmf_free_tbs_csr(&subj_csr.csr);

    kmf_free_algoid(&subj_csr.signature.algorithmIdentifier);
    kmf_free_data(&signed_data);

    return (ret);
}

/*
 *
 * Name: kmf_sign_csr
 *
 * Description:
 *   This function signs a CSR and returns the result as a
 *   signed, encoded CSR in SignedCsr
 *
 * Parameters:
 *   tbsCsr(input) - pointer to a KMF_DATA structure containing a
 *      DER encoded TBS CSR data
 *   Signkey(input) - pointer to the KMF_KEY_HANDLE structure containing
 *      the private key generated by the plug-in CreateKeypair
 *   algo(input) - contains algorithm info needed for signing
 *   SignedCsr(output) - pointer to the KMF_DATA structure containing
 *      the signed CSR
 *
 * Returns:
 *   A KMF_RETURN value indicating success or specifying a particular
 *   error condition.
 *   The value KMF_OK indicates success. All other values represent
 *   an error condition.
 *
 */
KMF_RETURN
kmf_sign_csr(KMF_HANDLE_T handle,
    const KMF_CSR_DATA *tbsCsr,
    KMF_KEY_HANDLE  *Signkey,
    KMF_DATA    *SignedCsr)
{
    KMF_RETURN err;
    KMF_DATA csrdata = { 0, NULL };

    CLEAR_ERROR(handle, err);
    if (err != KMF_OK)
        return (err);

    if (tbsCsr == NULL || Signkey == NULL || SignedCsr == NULL)
        return (KMF_ERR_BAD_PARAMETER);

    SignedCsr->Data = NULL;
    SignedCsr->Length = 0;

    err = DerEncodeTbsCsr((KMF_TBS_CSR *)&tbsCsr->csr, &csrdata);
    if (err == KMF_OK) {
        err = sign_csr(handle, &csrdata, Signkey,
            (KMF_X509_ALGORITHM_IDENTIFIER *)
            &tbsCsr->signature.algorithmIdentifier,
            SignedCsr);
    }

    if (err != KMF_OK) {
        kmf_free_data(SignedCsr);
    }
    kmf_free_data(&csrdata);
    return (err);
}

/*
 * kmf_decode_csr
 *
 * Description:
 *   This function decodes raw CSR data and fills in the KMF_CSR_DATA
 *   record.
 *
 * Inputs:
 *  KMF_HANDLE_T handle
 *  KMF_DATA *rawcsr
 *  KMF_CSR_DATA *csrdata;
 */
KMF_RETURN
kmf_decode_csr(KMF_HANDLE_T handle, KMF_DATA *rawcsr, KMF_CSR_DATA *csrdata)
{
    KMF_RETURN rv;
    KMF_CSR_DATA *cdata = NULL;

    if (handle == NULL || rawcsr == NULL || csrdata == NULL)
        return (KMF_ERR_BAD_PARAMETER);

    rv = DerDecodeSignedCsr(rawcsr, &cdata);
    if (rv != KMF_OK)
        return (rv);

    (void) memcpy(csrdata, cdata, sizeof (KMF_CSR_DATA));

    free(cdata);
    return (rv);
}

KMF_RETURN
kmf_verify_csr(KMF_HANDLE_T handle, int numattr,
    KMF_ATTRIBUTE *attrlist)
{
    KMF_RETURN rv = KMF_OK;
    KMF_CSR_DATA *csrdata = NULL;
    KMF_ALGORITHM_INDEX algid;
    KMF_X509_ALGORITHM_IDENTIFIER *x509alg;
    KMF_DATA rawcsr;

    KMF_ATTRIBUTE_TESTER required_attrs[] = {
        {KMF_CSR_DATA_ATTR, FALSE, sizeof (KMF_CSR_DATA),
        sizeof (KMF_CSR_DATA)},
    };

    int num_req_attrs = sizeof (required_attrs) /
        sizeof (KMF_ATTRIBUTE_TESTER);

    if (handle == NULL)
        return (KMF_ERR_BAD_PARAMETER);

    CLEAR_ERROR(handle, rv);

    rv = test_attributes(num_req_attrs, required_attrs,
        0, NULL, numattr, attrlist);
    if (rv != KMF_OK)
        return (rv);

    csrdata = kmf_get_attr_ptr(KMF_CSR_DATA_ATTR, attrlist, numattr);
    if (csrdata == NULL)
        return (KMF_ERR_BAD_PARAMETER);

    rv = DerEncodeTbsCsr(&csrdata->csr, &rawcsr);
    if (rv != KMF_OK)
        return (rv);

    x509alg = &csrdata->signature.algorithmIdentifier;
    algid = x509_algoid_to_algid(&x509alg->algorithm);
    if (algid == KMF_ALGID_SHA1WithDSA ||
        algid == KMF_ALGID_SHA256WithDSA) {
        /* Decode the DSA signature before verifying it */
        KMF_DATA signature;
        rv = DerDecodeDSASignature(&csrdata->signature.encrypted,
            &signature);
        if (rv != KMF_OK)
            goto end;

        rv = PKCS_VerifyData(handle, algid,
            &csrdata->csr.subjectPublicKeyInfo,
            &rawcsr, &signature);

        kmf_free_data(&signature);
    } else if (algid == KMF_ALGID_SHA1WithECDSA ||
        algid == KMF_ALGID_SHA256WithECDSA ||
        algid == KMF_ALGID_SHA384WithECDSA ||
        algid == KMF_ALGID_SHA512WithECDSA) {
        KMF_DATA signature;
        rv = DerDecodeECDSASignature(&csrdata->signature.encrypted,
            &signature);
        if (rv != KMF_OK)
            goto end;

        rv = PKCS_VerifyData(handle, algid,
            &csrdata->csr.subjectPublicKeyInfo,
            &rawcsr, &signature);

        kmf_free_data(&signature);
    } else {
        rv = PKCS_VerifyData(handle, algid,
            &csrdata->csr.subjectPublicKeyInfo,
            &rawcsr,
            &csrdata->signature.encrypted);
    }

end:
    kmf_free_data(&rawcsr);
    return (rv);
}

static KMF_RETURN
setup_crl_call(KMF_HANDLE_T handle, int numattr,
    KMF_ATTRIBUTE *attrlist, KMF_PLUGIN **plugin)
{
    KMF_RETURN ret;
    KMF_KEYSTORE_TYPE kstype;
    uint32_t len = sizeof (kstype);

    KMF_ATTRIBUTE_TESTER required_attrs[] = {
        {KMF_KEYSTORE_TYPE_ATTR, FALSE, 1, sizeof (KMF_KEYSTORE_TYPE)}
    };

    int num_req_attrs = sizeof (required_attrs) /
        sizeof (KMF_ATTRIBUTE_TESTER);

    if (handle == NULL || plugin == NULL)
        return (KMF_ERR_BAD_PARAMETER);

    CLEAR_ERROR(handle, ret);

    ret = test_attributes(num_req_attrs, required_attrs,
        0, NULL, numattr, attrlist);
    if (ret != KMF_OK)
        return (ret);

    ret = kmf_get_attr(KMF_KEYSTORE_TYPE_ATTR, attrlist, numattr,
        &kstype, &len);
    if (ret != KMF_OK)
        return (ret);

    switch (kstype) {
    case KMF_KEYSTORE_NSS:
        *plugin = FindPlugin(handle, kstype);
        break;

    case KMF_KEYSTORE_OPENSSL:
    case KMF_KEYSTORE_PK11TOKEN: /* PKCS#11 CRL is file-based */
        *plugin = FindPlugin(handle, KMF_KEYSTORE_OPENSSL);
        break;
    default:
        return (KMF_ERR_PLUGIN_NOTFOUND);
    }
    return (KMF_OK);
}

KMF_RETURN
kmf_import_crl(KMF_HANDLE_T handle, int numattr, KMF_ATTRIBUTE *attrlist)
{
    KMF_RETURN ret;
    KMF_PLUGIN *plugin;

    ret = setup_crl_call(handle, numattr, attrlist, &plugin);
    if (ret != KMF_OK)
        return (ret);

    if (plugin == NULL)
        return (KMF_ERR_PLUGIN_NOTFOUND);
    else if (plugin->funclist->ImportCRL != NULL)
        return (plugin->funclist->ImportCRL(handle, numattr, attrlist));

    return (KMF_ERR_FUNCTION_NOT_FOUND);
}

KMF_RETURN
kmf_delete_crl(KMF_HANDLE_T handle, int numattr, KMF_ATTRIBUTE *attrlist)
{
    KMF_RETURN ret;
    KMF_PLUGIN *plugin;

    ret = setup_crl_call(handle, numattr, attrlist, &plugin);
    if (ret != KMF_OK)
        return (ret);

    if (plugin == NULL)
        return (KMF_ERR_PLUGIN_NOTFOUND);
    else if (plugin->funclist->DeleteCRL != NULL)
        return (plugin->funclist->DeleteCRL(handle, numattr, attrlist));

    return (KMF_ERR_FUNCTION_NOT_FOUND);
}

KMF_RETURN
kmf_list_crl(KMF_HANDLE_T handle, int numattr, KMF_ATTRIBUTE *attrlist)
{
    KMF_PLUGIN *plugin;
    KMF_RETURN ret;

    ret = setup_crl_call(handle, numattr, attrlist, &plugin);
    if (ret != KMF_OK)
        return (ret);

    if (plugin == NULL)
        return (KMF_ERR_PLUGIN_NOTFOUND);
    else if (plugin->funclist->ListCRL != NULL)
        return (plugin->funclist->ListCRL(handle, numattr, attrlist));
    return (KMF_ERR_FUNCTION_NOT_FOUND);
}

KMF_RETURN
kmf_find_crl(KMF_HANDLE_T handle, int numattr, KMF_ATTRIBUTE *attrlist)
{
    KMF_PLUGIN *plugin;
    KMF_RETURN ret;
    KMF_KEYSTORE_TYPE kstype;
    uint32_t len = sizeof (kstype);

    KMF_ATTRIBUTE_TESTER required_attrs[] = {
        {KMF_KEYSTORE_TYPE_ATTR, FALSE, 1,
        sizeof (KMF_KEYSTORE_TYPE)},
        {KMF_CRL_COUNT_ATTR, FALSE,
        sizeof (char *), sizeof (char *)}
    };

    int num_req_attrs = sizeof (required_attrs) /
        sizeof (KMF_ATTRIBUTE_TESTER);
    if (handle == NULL)
        return (KMF_ERR_BAD_PARAMETER);

    CLEAR_ERROR(handle, ret);

    ret = test_attributes(num_req_attrs, required_attrs,
        0, NULL, numattr, attrlist);
    if (ret != KMF_OK)
        return (ret);

    ret = kmf_get_attr(KMF_KEYSTORE_TYPE_ATTR, attrlist, numattr,
        &kstype, &len);
    if (ret != KMF_OK)
        return (ret);

    switch (kstype) {
    case KMF_KEYSTORE_NSS:
        plugin = FindPlugin(handle, kstype);
        break;
    case KMF_KEYSTORE_OPENSSL:
    case KMF_KEYSTORE_PK11TOKEN:
        return (KMF_ERR_FUNCTION_NOT_FOUND);
    default:
        /*
         * FindCRL is only implemented for NSS. PKCS#11
         * and file-based keystores just store in a file
         * and don't need a "Find" function.
         */
        return (KMF_ERR_PLUGIN_NOTFOUND);
    }

    if (plugin == NULL)
        return (KMF_ERR_PLUGIN_NOTFOUND);
    else if (plugin->funclist->FindCRL != NULL) {
        return (plugin->funclist->FindCRL(handle, numattr,
            attrlist));
    }
    return (KMF_ERR_FUNCTION_NOT_FOUND);
}

KMF_RETURN
kmf_find_cert_in_crl(KMF_HANDLE_T handle, int numattr, KMF_ATTRIBUTE *attrlist)
{
    KMF_RETURN ret;
    KMF_PLUGIN *plugin;

    ret = setup_crl_call(handle, numattr, attrlist, &plugin);
    if (ret != KMF_OK)
        return (ret);

    if (plugin == NULL)
        return (KMF_ERR_PLUGIN_NOTFOUND);
    else if (plugin->funclist->FindCertInCRL != NULL)
        return (plugin->funclist->FindCertInCRL(handle, numattr,
            attrlist));

    return (KMF_ERR_FUNCTION_NOT_FOUND);
}

KMF_RETURN
kmf_verify_crl_file(KMF_HANDLE_T handle, char *crlfile, KMF_DATA *tacert)
{
    KMF_PLUGIN *plugin;
    KMF_RETURN (*verifyCRLFile)(KMF_HANDLE_T, char *, KMF_DATA *);

    if (handle == NULL)
        return (KMF_ERR_BAD_PARAMETER);

    plugin = FindPlugin(handle, KMF_KEYSTORE_OPENSSL);
    if (plugin == NULL || plugin->dldesc == NULL) {
        return (KMF_ERR_PLUGIN_NOTFOUND);
    }

    verifyCRLFile = (KMF_RETURN(*)())dlsym(plugin->dldesc,
        "OpenSSL_VerifyCRLFile");

    if (verifyCRLFile == NULL) {
        return (KMF_ERR_FUNCTION_NOT_FOUND);
    }

    return (verifyCRLFile(handle, crlfile, tacert));
}

KMF_RETURN
kmf_check_crl_date(KMF_HANDLE_T handle, char *crlname)
{
    KMF_PLUGIN *plugin;
    KMF_RETURN (*checkCRLDate)(void *, char *);
    KMF_RETURN ret = KMF_OK;

    if (handle == NULL)
        return (KMF_ERR_BAD_PARAMETER);

    CLEAR_ERROR(handle, ret);
    if (ret != KMF_OK)
        return (ret);

    plugin = FindPlugin(handle, KMF_KEYSTORE_OPENSSL);
    if (plugin == NULL || plugin->dldesc == NULL) {
        return (KMF_ERR_PLUGIN_NOTFOUND);
    }

    checkCRLDate = (KMF_RETURN(*)())dlsym(plugin->dldesc,
        "OpenSSL_CheckCRLDate");

    if (checkCRLDate == NULL) {
        return (KMF_ERR_FUNCTION_NOT_FOUND);
    }

    return (checkCRLDate(handle, crlname));
}

KMF_RETURN
kmf_is_crl_file(KMF_HANDLE_T handle, char *filename, KMF_ENCODE_FORMAT *pformat)
{
    KMF_PLUGIN *plugin;
    KMF_RETURN (*IsCRLFileFn)(void *, char *, KMF_ENCODE_FORMAT *);
    KMF_RETURN ret = KMF_OK;

    CLEAR_ERROR(handle, ret);
    if (ret != KMF_OK)
        return (ret);

    if (filename  == NULL || pformat == NULL) {
        return (KMF_ERR_BAD_PARAMETER);
    }

    /*
     * This framework function is actually implemented in the openssl
     * plugin library, so we find the function address and call it.
     */
    plugin = FindPlugin(handle, KMF_KEYSTORE_OPENSSL);
    if (plugin == NULL || plugin->dldesc == NULL) {
        return (KMF_ERR_PLUGIN_NOTFOUND);
    }

    IsCRLFileFn = (KMF_RETURN(*)())dlsym(plugin->dldesc,
        "OpenSSL_IsCRLFile");
    if (IsCRLFileFn == NULL) {
        return (KMF_ERR_FUNCTION_NOT_FOUND);
    }

    return (IsCRLFileFn(handle, filename, pformat));
}