/* ocsp_lib.c */

/*

 * Written by Tom Titchener <Tom_Titchener@groove.net> for the OpenSSL

 * project.

 */

/*

 * History: This file was transfered to Richard Levitte from CertCo by Kathy

 * Weinhold in mid-spring 2000 to be included in OpenSSL or released as a

 * patch kit.

 */

/* ====================================================================

 * Copyright (c) 1998-2000 The OpenSSL Project.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 *

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in

 *    the documentation and/or other materials provided with the

 *    distribution.

 *

 * 3. All advertising materials mentioning features or use of this

 *    software must display the following acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"

 *

 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

 *    endorse or promote products derived from this software without

 *    prior written permission. For written permission, please contact

 *    openssl-core@openssl.org.

 *

 * 5. Products derived from this software may not be called "OpenSSL"

 *    nor may "OpenSSL" appear in their names without prior written

 *    permission of the OpenSSL Project.

 *

 * 6. Redistributions of any form whatsoever must retain the following

 *    acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"

 *

 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR

 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

 * OF THE POSSIBILITY OF SUCH DAMAGE.

 * ====================================================================

 *

 * This product includes cryptographic software written by Eric Young

 * (eay@cryptsoft.com).  This product includes software written by Tim

 * Hudson (tjh@cryptsoft.com).

 *

 */

#include <stdio.h>

#include <cryptlib.h>

#include <openssl/objects.h>

#include <openssl/rand.h>

#include <openssl/x509.h>

#include <openssl/pem.h>

#include <openssl/x509v3.h>

#include <openssl/ocsp.h>

#include <openssl/asn1t.h>

/* Convert a certificate and its issuer to an OCSP_CERTID */

OCSP_CERTID *OCSP_cert_to_id(const EVP_MD *dgst, X509 *subject, X509 *issuer)

{

    X509_NAME *iname;

    ASN1_INTEGER *serial;

    ASN1_BIT_STRING *ikey;

#ifndef OPENSSL_NO_SHA1

    if (!dgst)

        dgst = EVP_sha1();

#endif

    if (subject) {

        iname = X509_get_issuer_name(subject);

        serial = X509_get_serialNumber(subject);

    } else {

        iname = X509_get_subject_name(issuer);

        serial = NULL;

    }

    ikey = X509_get0_pubkey_bitstr(issuer);

    return OCSP_cert_id_new(dgst, iname, ikey, serial);

}

OCSP_CERTID *OCSP_cert_id_new(const EVP_MD *dgst,

                              X509_NAME *issuerName,

                              ASN1_BIT_STRING *issuerKey,

                              ASN1_INTEGER *serialNumber)

{

    int nid;

    unsigned int i;

    X509_ALGOR *alg;

    OCSP_CERTID *cid = NULL;

    unsigned char md[EVP_MAX_MD_SIZE];

    if (!(cid = OCSP_CERTID_new()))

        goto err;

    alg = cid->hashAlgorithm;

    if (alg->algorithm != NULL)

        ASN1_OBJECT_free(alg->algorithm);

    if ((nid = EVP_MD_type(dgst)) == NID_undef) {

        OCSPerr(OCSP_F_OCSP_CERT_ID_NEW, OCSP_R_UNKNOWN_NID);

        goto err;

    }

    if (!(alg->algorithm = OBJ_nid2obj(nid)))

        goto err;

    if ((alg->parameter = ASN1_TYPE_new()) == NULL)

        goto err;

    alg->parameter->type = V_ASN1_NULL;

    if (!X509_NAME_digest(issuerName, dgst, md, &i))

        goto digerr;

    if (!(ASN1_OCTET_STRING_set(cid->issuerNameHash, md, i)))

        goto err;

    /* Calculate the issuerKey hash, excluding tag and length */

    if (!EVP_Digest(issuerKey->data, issuerKey->length, md, &i, dgst, NULL))

        goto err;

    if (!(ASN1_OCTET_STRING_set(cid->issuerKeyHash, md, i)))

        goto err;

    if (serialNumber) {

        ASN1_INTEGER_free(cid->serialNumber);

        if (!(cid->serialNumber = ASN1_INTEGER_dup(serialNumber)))

            goto err;

    }

    return cid;

 digerr:

    OCSPerr(OCSP_F_OCSP_CERT_ID_NEW, OCSP_R_DIGEST_ERR);

 err:

    if (cid)

        OCSP_CERTID_free(cid);

    return NULL;

}

int OCSP_id_issuer_cmp(OCSP_CERTID *a, OCSP_CERTID *b)

{

    int ret;

    ret = OBJ_cmp(a->hashAlgorithm->algorithm, b->hashAlgorithm->algorithm);

    if (ret)

        return ret;

    ret = ASN1_OCTET_STRING_cmp(a->issuerNameHash, b->issuerNameHash);

    if (ret)

        return ret;

    return ASN1_OCTET_STRING_cmp(a->issuerKeyHash, b->issuerKeyHash);

}

int OCSP_id_cmp(OCSP_CERTID *a, OCSP_CERTID *b)

{

    int ret;

    ret = OCSP_id_issuer_cmp(a, b);

    if (ret)

        return ret;

    return ASN1_INTEGER_cmp(a->serialNumber, b->serialNumber);

}

/*

 * Parse a URL and split it up into host, port and path components and

 * whether it is SSL.

 */

int OCSP_parse_url(const char *url, char **phost, char **pport, char **ppath,

                   int *pssl)

{

    char *p, *buf;

    char *host, *port;

    *phost = NULL;

    *pport = NULL;

    *ppath = NULL;

    /* dup the buffer since we are going to mess with it */

    buf = BUF_strdup(url);

    if (!buf)

        goto mem_err;

    /* Check for initial colon */

    p = strchr(buf, ':');

    if (!p)

        goto parse_err;

    *(p++) = '\0';

    if (!strcmp(buf, "http")) {

        *pssl = 0;

        port = "80";

    } else if (!strcmp(buf, "https")) {

        *pssl = 1;

        port = "443";

    } else

        goto parse_err;

    /* Check for double slash */

    if ((p[0] != '/') || (p[1] != '/'))

        goto parse_err;

    p += 2;

    host = p;

    /* Check for trailing part of path */

    p = strchr(p, '/');

    if (!p)

        *ppath = BUF_strdup("/");

    else {

        *ppath = BUF_strdup(p);

        /* Set start of path to 0 so hostname is valid */

        *p = '\0';

    }

    if (!*ppath)

        goto mem_err;

    p = host;

    if (host[0] == '[') {

        /* ipv6 literal */

        host++;

        p = strchr(host, ']');

        if (!p)

            goto parse_err;

        *p = '\0';

        p++;

    }

    /* Look for optional ':' for port number */

    if ((p = strchr(p, ':'))) {

        *p = 0;

        port = p + 1;

    }

    *pport = BUF_strdup(port);

    if (!*pport)

        goto mem_err;

    *phost = BUF_strdup(host);

    if (!*phost)

        goto mem_err;

    OPENSSL_free(buf);

    return 1;

 mem_err:

    OCSPerr(OCSP_F_OCSP_PARSE_URL, ERR_R_MALLOC_FAILURE);

    goto err;

 parse_err:

    OCSPerr(OCSP_F_OCSP_PARSE_URL, OCSP_R_ERROR_PARSING_URL);

 err:

    if (buf)

        OPENSSL_free(buf);

    if (*ppath) {

        OPENSSL_free(*ppath);

        *ppath = NULL;

    }

    if (*pport) {

        OPENSSL_free(*pport);

        *pport = NULL;

    }

    if (*phost) {

        OPENSSL_free(*phost);

        *phost = NULL;

    }

    return 0;

}

IMPLEMENT_ASN1_DUP_FUNCTION(OCSP_CERTID)