path: root/smime/lib/e-cert.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* The following is the mozilla license blurb, as the bodies some of
 * these functions were derived from the mozilla source. */
/*
 * 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.
 *
 * 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.
 */

/*
 * Author: Chris Toshok (toshok@ximian.com)
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <time.h>

#include <glib/gi18n.h>

/* for e_utf8_strftime, what about e_time_format_time? */
#include <e-util/e-util.h>

#include "e-cert.h"
#include "e-cert-trust.h"
#include "pk11func.h"
#include "certdb.h"
#include "hasht.h"

#define E_CERT_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_CERT, ECertPrivate))

struct _ECertPrivate {
    CERTCertificate *cert;

    /* pointers we cache since the nss implementation allocs the
     * string */
    gchar *org_name;
    gchar *org_unit_name;
    gchar *cn;

    gchar *issuer_org_name;
    gchar *issuer_org_unit_name;
    gchar *issuer_cn;

    PRTime issued_on;
    PRTime expires_on;

    gchar *issued_on_string;
    gchar *expires_on_string;

    gchar *serial_number;

    gchar *usage_string;

    gchar *sha1_fingerprint;
    gchar *md5_fingerprint;

    EASN1Object *asn1;

    gboolean delete;
};

G_DEFINE_TYPE (ECert, e_cert, G_TYPE_OBJECT)

static void
e_cert_finalize (GObject *object)
{
    ECertPrivate *priv;

    priv = E_CERT_GET_PRIVATE (object);

    if (priv->org_name)
        PORT_Free (priv->org_name);
    if (priv->org_unit_name)
        PORT_Free (priv->org_unit_name);
    if (priv->cn)
        PORT_Free (priv->cn);

    if (priv->issuer_org_name)
        PORT_Free (priv->issuer_org_name);
    if (priv->issuer_org_unit_name)
        PORT_Free (priv->issuer_org_unit_name);
    if (priv->issuer_cn)
        PORT_Free (priv->issuer_cn);

    if (priv->issued_on_string)
        PORT_Free (priv->issued_on_string);
    if (priv->expires_on_string)
        PORT_Free (priv->expires_on_string);
    if (priv->serial_number)
        PORT_Free (priv->serial_number);

    g_free (priv->usage_string);

    if (priv->sha1_fingerprint)
        PORT_Free (priv->sha1_fingerprint);
    if (priv->md5_fingerprint)
        PORT_Free (priv->md5_fingerprint);

    if (priv->asn1)
        g_object_unref (priv->asn1);

    if (priv->delete) {
        printf ("attempting to delete cert marked for deletion\n");
        if (e_cert_get_cert_type (E_CERT (object)) == E_CERT_USER) {
            PK11_DeleteTokenCertAndKey (priv->cert, NULL);
        } else if (!PK11_IsReadOnly (priv->cert->slot)) {
            /* If the list of built-ins does contain a non-removable
             * copy of this certificate, our call will not remove
             * the certificate permanently, but rather remove all trust. */
            SEC_DeletePermCertificate (priv->cert);
        }
    }

    if (priv->cert)
        CERT_DestroyCertificate (priv->cert);

    /* Chain up to parent's finalize() method. */
    G_OBJECT_CLASS (e_cert_parent_class)->finalize (object);
}

static void
e_cert_class_init (ECertClass *class)
{
    GObjectClass *object_class;

    g_type_class_add_private (class, sizeof (ECertPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->finalize = e_cert_finalize;
}

static void
e_cert_init (ECert *ec)
{
    ec->priv = E_CERT_GET_PRIVATE (ec);
}

static void
e_cert_populate (ECert *cert)
{
    CERTCertificate *c = cert->priv->cert;
    guchar fingerprint[20];
    SECItem fpItem;

    cert->priv->org_name = CERT_GetOrgName (&c->subject);
    cert->priv->org_unit_name = CERT_GetOrgUnitName (&c->subject);

    cert->priv->issuer_org_name = CERT_GetOrgName (&c->issuer);
    cert->priv->issuer_org_unit_name = CERT_GetOrgUnitName (&c->issuer);

    cert->priv->cn = CERT_GetCommonName (&c->subject);
    cert->priv->issuer_cn = CERT_GetCommonName (&c->issuer);

    if (SECSuccess == CERT_GetCertTimes (
        c, &cert->priv->issued_on, &cert->priv->expires_on)) {
        PRExplodedTime explodedTime;
        struct tm exploded_tm;
        gchar buf[32];

        PR_ExplodeTime (
            cert->priv->issued_on,
            PR_LocalTimeParameters, &explodedTime);
        exploded_tm.tm_sec = explodedTime.tm_sec;
        exploded_tm.tm_min = explodedTime.tm_min;
        exploded_tm.tm_hour = explodedTime.tm_hour;
        exploded_tm.tm_mday = explodedTime.tm_mday;
        exploded_tm.tm_mon = explodedTime.tm_month;
        exploded_tm.tm_year = explodedTime.tm_year - 1900;
        e_utf8_strftime (buf, sizeof (buf), _("%d/%m/%Y"), &exploded_tm);
        cert->priv->issued_on_string = g_strdup (buf);

        PR_ExplodeTime (
            cert->priv->expires_on,
            PR_LocalTimeParameters, &explodedTime);
        exploded_tm.tm_sec = explodedTime.tm_sec;
        exploded_tm.tm_min = explodedTime.tm_min;
        exploded_tm.tm_hour = explodedTime.tm_hour;
        exploded_tm.tm_mday = explodedTime.tm_mday;
        exploded_tm.tm_mon = explodedTime.tm_month;
        exploded_tm.tm_year = explodedTime.tm_year - 1900;
        e_utf8_strftime (buf, sizeof (buf), _("%d/%m/%Y"), &exploded_tm);
        cert->priv->expires_on_string = g_strdup (buf);
    }

    cert->priv->serial_number = CERT_Hexify (&cert->priv->cert->serialNumber, TRUE);

    memset (fingerprint, 0, sizeof fingerprint);
    PK11_HashBuf (
        SEC_OID_SHA1, fingerprint,
        cert->priv->cert->derCert.data,
        cert->priv->cert->derCert.len);
    fpItem.data = fingerprint;
    fpItem.len = SHA1_LENGTH;
    cert->priv->sha1_fingerprint = CERT_Hexify (&fpItem, TRUE);

    memset (fingerprint, 0, sizeof fingerprint);
    PK11_HashBuf (
        SEC_OID_MD5, fingerprint,
        cert->priv->cert->derCert.data,
        cert->priv->cert->derCert.len);
    fpItem.data = fingerprint;
    fpItem.len = MD5_LENGTH;
    cert->priv->md5_fingerprint = CERT_Hexify (&fpItem, TRUE);
}

ECert *
e_cert_new (CERTCertificate *cert)
{
    ECert *ecert = E_CERT (g_object_new (E_TYPE_CERT, NULL));

    /* ECert owns a reference to the 'cert', which will be freed on ECert finalize */
    ecert->priv->cert = cert;

    e_cert_populate (ecert);

    return ecert;
}

ECert *
e_cert_new_from_der (gchar *data,
                     guint32 len)
{
    CERTCertificate *cert = CERT_DecodeCertFromPackage (data, len);

    if (!cert)
        return NULL;

    if (cert->dbhandle == NULL)
        cert->dbhandle = CERT_GetDefaultCertDB ();

    return e_cert_new (cert);
}

CERTCertificate *
e_cert_get_internal_cert (ECert *cert)
{
    /* XXX should this refcnt it? */
    return cert->priv->cert;
}

gboolean
e_cert_get_raw_der (ECert *cert,
                    gchar **data,
                    guint32 *len)
{
    /* XXX do we really need to check if cert->priv->cert is NULL
     * here?  it should always be non - null if we have the
     * ECert.. */
    if (cert->priv->cert) {
        *data = (gchar *)cert->priv->cert->derCert.data;
        *len = (guint32)cert->priv->cert->derCert.len;
        return TRUE;
    }

    *len = 0;
    return FALSE;

}

const gchar *
e_cert_get_window_title (ECert *cert)
{
    if (cert->priv->cert->nickname)
        return cert->priv->cert->nickname;
    else if (cert->priv->cn)
        return cert->priv->cn;
    else
        return cert->priv->cert->subjectName;
}

const gchar *
e_cert_get_nickname (ECert *cert)
{
    return cert->priv->cert->nickname;
}

const gchar *
e_cert_get_email (ECert *cert)
{
    return cert->priv->cert->emailAddr;
}

const gchar *
e_cert_get_org (ECert *cert)
{
    return cert->priv->org_name;
}

const gchar *
e_cert_get_org_unit (ECert *cert)
{
    return cert->priv->org_unit_name;
}

const gchar *
e_cert_get_cn (ECert *cert)
{
    return cert->priv->cn;
}

const gchar *
e_cert_get_issuer_name (ECert *cert)
{
    return cert->priv->cert->issuerName;
}

const gchar *
e_cert_get_issuer_cn (ECert *cert)
{
    return cert->priv->issuer_cn;
}

const gchar *
e_cert_get_issuer_org (ECert *cert)
{
    return cert->priv->issuer_org_name;
}

const gchar *
e_cert_get_issuer_org_unit (ECert *cert)
{
    return cert->priv->issuer_org_unit_name;
}

const gchar *
e_cert_get_subject_name (ECert *cert)
{
    return cert->priv->cert->subjectName;
}

PRTime
e_cert_get_issued_on_time (ECert *cert)
{
    return cert->priv->issued_on;
}

const gchar *
e_cert_get_issued_on (ECert *cert)
{
    return cert->priv->issued_on_string;
}

PRTime
e_cert_get_expires_on_time (ECert *cert)
{
    return cert->priv->expires_on;
}

const gchar *
e_cert_get_expires_on (ECert *cert)
{
    return cert->priv->expires_on_string;
}

static struct {
    gint bit;
    const gchar *text;
} usageinfo[] = {
    /* x509 certificate usage types */
    { certificateUsageEmailSigner, N_("Sign") },
    { certificateUsageEmailRecipient, N_("Encrypt") },
};

const gchar *
e_cert_get_usage (ECert *cert)
{
    if (cert->priv->usage_string == NULL) {
        gint i;
        GString *str = g_string_new ("");
        CERTCertificate *icert = e_cert_get_internal_cert (cert);

        for (i = 0; i < G_N_ELEMENTS (usageinfo); i++) {
            if (icert->keyUsage & usageinfo[i].bit) {
                if (str->len != 0)
                    g_string_append (str, ", ");
                g_string_append (str, _(usageinfo[i].text));
            }
        }

        cert->priv->usage_string = str->str;
        g_string_free (str, FALSE);
    }

    return cert->priv->usage_string;
}

const gchar *
e_cert_get_serial_number (ECert *cert)
{
    return cert->priv->serial_number;
}

const gchar *
e_cert_get_sha1_fingerprint (ECert *cert)
{
    return cert->priv->sha1_fingerprint;
}

const gchar *
e_cert_get_md5_fingerprint (ECert *cert)
{
    return cert->priv->md5_fingerprint;
}

GList *
e_cert_get_issuers_chain (ECert *ecert)
{
    GList *issuers = NULL;

    while (ecert) {
        CERTCertificate *cert = e_cert_get_internal_cert (ecert);
        CERTCertificate *next_cert;

        if (SECITEM_CompareItem (&cert->derIssuer, &cert->derSubject) == SECEqual)
            break;

        next_cert = CERT_FindCertIssuer (cert, PR_Now (), certUsageSSLClient);
        if (!next_cert)
            break;

        /* next_cert has a reference already */
        ecert = e_cert_new (next_cert);

        if (ecert) {
            /* the first is issuer of the original ecert */
            issuers = g_list_append (issuers, ecert);
        }
    }

    return issuers;
}

ECert *
e_cert_get_ca_cert (ECert *ecert)
{
    CERTCertificate *cert, *next = e_cert_get_internal_cert (ecert), *internal;

    cert = next;
    internal = cert;
    do {
        if (cert != next && cert != internal)
            CERT_DestroyCertificate (cert);

        cert = next;
        next = CERT_FindCertIssuer (cert, PR_Now (), certUsageAnyCA);
    } while (next && next != cert);

    if (cert == internal)
        return g_object_ref (ecert);
    else
        return e_cert_new (cert);
}

EASN1Object *
e_cert_get_asn1_struct (ECert *cert)
{
    if (!cert->priv->asn1)
        cert->priv->asn1 = e_asn1_object_new_from_cert (cert->priv->cert);

    if (cert->priv->asn1)
        return g_object_ref (cert->priv->asn1);

    return NULL;
}

gboolean
e_cert_mark_for_deletion (ECert *cert)
{
    /* nsNSSShutDownPreventionLock locker; */

#if 0
    /* make sure user is logged in to the token */
    nsCOMPtr < nsIInterfaceRequestor> ctx = new PipUIContext ();
#endif

    if (PK11_NeedLogin (cert->priv->cert->slot)
        && !PK11_NeedUserInit (cert->priv->cert->slot)
        && !PK11_IsInternal (cert->priv->cert->slot)) {
        if (PK11_Authenticate (
            cert->priv->cert->slot, PR_TRUE, NULL) != SECSuccess) {
            return FALSE;
        }
    }

    cert->priv->delete = TRUE;

    return TRUE;
}

ECertType
e_cert_get_cert_type (ECert *ecert)
{
    const gchar *nick = e_cert_get_nickname (ecert);
    const gchar *email = e_cert_get_email (ecert);
    CERTCertificate *cert = ecert->priv->cert;

    if (nick) {
        if (e_cert_trust_has_any_user (cert->trust))
            return E_CERT_USER;
        if (e_cert_trust_has_any_ca (cert->trust)
            || CERT_IsCACert (cert,NULL))
            return E_CERT_CA;
        if (e_cert_trust_has_peer (cert->trust, PR_TRUE, PR_FALSE, PR_FALSE))
            return E_CERT_SITE;
    }
    if (email && e_cert_trust_has_peer (cert->trust, PR_FALSE, PR_TRUE, PR_FALSE))
        return E_CERT_CONTACT;

    return E_CERT_UNKNOWN;
}