ocsp_lib.c revision 296465 
115645Sjoerg/* ocsp_lib.c */
221673Sjkh/*
31592Srgrimes * Written by Tom Titchener <Tom_Titchener@groove.net> for the OpenSSL
41592Srgrimes * project.
522208Sdavidn */
61592Srgrimes
71592Srgrimes/*
81875Swollman * History: This file was transfered to Richard Levitte from CertCo by Kathy
91875Swollman * Weinhold in mid-spring 2000 to be included in OpenSSL or released as a
1015645Sjoerg * patch kit.
1115645Sjoerg */
121592Srgrimes
131592Srgrimes/* ====================================================================
1422208Sdavidn * Copyright (c) 1998-2000 The OpenSSL Project.  All rights reserved.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 *
20 * 1. Redistributions of source code must retain the above copyright
21 *    notice, this list of conditions and the following disclaimer.
22 *
23 * 2. Redistributions in binary form must reproduce the above copyright
24 *    notice, this list of conditions and the following disclaimer in
25 *    the documentation and/or other materials provided with the
26 *    distribution.
27 *
28 * 3. All advertising materials mentioning features or use of this
29 *    software must display the following acknowledgment:
30 *    "This product includes software developed by the OpenSSL Project
31 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
32 *
33 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
34 *    endorse or promote products derived from this software without
35 *    prior written permission. For written permission, please contact
36 *    openssl-core@openssl.org.
37 *
38 * 5. Products derived from this software may not be called "OpenSSL"
39 *    nor may "OpenSSL" appear in their names without prior written
40 *    permission of the OpenSSL Project.
41 *
42 * 6. Redistributions of any form whatsoever must retain the following
43 *    acknowledgment:
44 *    "This product includes software developed by the OpenSSL Project
45 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
46 *
47 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
48 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
50 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
51 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
52 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
53 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
54 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
56 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
57 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
58 * OF THE POSSIBILITY OF SUCH DAMAGE.
59 * ====================================================================
60 *
61 * This product includes cryptographic software written by Eric Young
62 * (eay@cryptsoft.com).  This product includes software written by Tim
63 * Hudson (tjh@cryptsoft.com).
64 *
65 */
66
67#include <stdio.h>
68#include <cryptlib.h>
69#include <openssl/objects.h>
70#include <openssl/rand.h>
71#include <openssl/x509.h>
72#include <openssl/pem.h>
73#include <openssl/x509v3.h>
74#include <openssl/ocsp.h>
75
76/* Convert a certificate and its issuer to an OCSP_CERTID */
77
78OCSP_CERTID *OCSP_cert_to_id(const EVP_MD *dgst, X509 *subject, X509 *issuer)
79{
80    X509_NAME *iname;
81    ASN1_INTEGER *serial;
82    ASN1_BIT_STRING *ikey;
83#ifndef OPENSSL_NO_SHA1
84    if (!dgst)
85        dgst = EVP_sha1();
86#endif
87    if (subject) {
88        iname = X509_get_issuer_name(subject);
89        serial = X509_get_serialNumber(subject);
90    } else {
91        iname = X509_get_subject_name(issuer);
92        serial = NULL;
93    }
94    ikey = X509_get0_pubkey_bitstr(issuer);
95    return OCSP_cert_id_new(dgst, iname, ikey, serial);
96}
97
98OCSP_CERTID *OCSP_cert_id_new(const EVP_MD *dgst,
99                              X509_NAME *issuerName,
100                              ASN1_BIT_STRING *issuerKey,
101                              ASN1_INTEGER *serialNumber)
102{
103    int nid;
104    unsigned int i;
105    X509_ALGOR *alg;
106    OCSP_CERTID *cid = NULL;
107    unsigned char md[EVP_MAX_MD_SIZE];
108
109    if (!(cid = OCSP_CERTID_new()))
110        goto err;
111
112    alg = cid->hashAlgorithm;
113    if (alg->algorithm != NULL)
114        ASN1_OBJECT_free(alg->algorithm);
115    if ((nid = EVP_MD_type(dgst)) == NID_undef) {
116        OCSPerr(OCSP_F_OCSP_CERT_ID_NEW, OCSP_R_UNKNOWN_NID);
117        goto err;
118    }
119    if (!(alg->algorithm = OBJ_nid2obj(nid)))
120        goto err;
121    if ((alg->parameter = ASN1_TYPE_new()) == NULL)
122        goto err;
123    alg->parameter->type = V_ASN1_NULL;
124
125    if (!X509_NAME_digest(issuerName, dgst, md, &i))
126        goto digerr;
127    if (!(ASN1_OCTET_STRING_set(cid->issuerNameHash, md, i)))
128        goto err;
129
130    /* Calculate the issuerKey hash, excluding tag and length */
131    EVP_Digest(issuerKey->data, issuerKey->length, md, &i, dgst, NULL);
132
133    if (!(ASN1_OCTET_STRING_set(cid->issuerKeyHash, md, i)))
134        goto err;
135
136    if (serialNumber) {
137        ASN1_INTEGER_free(cid->serialNumber);
138        if (!(cid->serialNumber = ASN1_INTEGER_dup(serialNumber)))
139            goto err;
140    }
141    return cid;
142 digerr:
143    OCSPerr(OCSP_F_OCSP_CERT_ID_NEW, OCSP_R_DIGEST_ERR);
144 err:
145    if (cid)
146        OCSP_CERTID_free(cid);
147    return NULL;
148}
149
150int OCSP_id_issuer_cmp(OCSP_CERTID *a, OCSP_CERTID *b)
151{
152    int ret;
153    ret = OBJ_cmp(a->hashAlgorithm->algorithm, b->hashAlgorithm->algorithm);
154    if (ret)
155        return ret;
156    ret = ASN1_OCTET_STRING_cmp(a->issuerNameHash, b->issuerNameHash);
157    if (ret)
158        return ret;
159    return ASN1_OCTET_STRING_cmp(a->issuerKeyHash, b->issuerKeyHash);
160}
161
162int OCSP_id_cmp(OCSP_CERTID *a, OCSP_CERTID *b)
163{
164    int ret;
165    ret = OCSP_id_issuer_cmp(a, b);
166    if (ret)
167        return ret;
168    return ASN1_INTEGER_cmp(a->serialNumber, b->serialNumber);
169}
170
171/*
172 * Parse a URL and split it up into host, port and path components and
173 * whether it is SSL.
174 */
175
176int OCSP_parse_url(char *url, char **phost, char **pport, char **ppath,
177                   int *pssl)
178{
179    char *p, *buf;
180
181    char *host, *port;
182
183    *phost = NULL;
184    *pport = NULL;
185    *ppath = NULL;
186
187    /* dup the buffer since we are going to mess with it */
188    buf = BUF_strdup(url);
189    if (!buf)
190        goto mem_err;
191
192    /* Check for initial colon */
193    p = strchr(buf, ':');
194
195    if (!p)
196        goto parse_err;
197
198    *(p++) = '\0';
199
200    if (!strcmp(buf, "http")) {
201        *pssl = 0;
202        port = "80";
203    } else if (!strcmp(buf, "https")) {
204        *pssl = 1;
205        port = "443";
206    } else
207        goto parse_err;
208
209    /* Check for double slash */
210    if ((p[0] != '/') || (p[1] != '/'))
211        goto parse_err;
212
213    p += 2;
214
215    host = p;
216
217    /* Check for trailing part of path */
218
219    p = strchr(p, '/');
220
221    if (!p)
222        *ppath = BUF_strdup("/");
223    else {
224        *ppath = BUF_strdup(p);
225        /* Set start of path to 0 so hostname is valid */
226        *p = '\0';
227    }
228
229    if (!*ppath)
230        goto mem_err;
231
232    p = host;
233    if (host[0] == '[') {
234        /* ipv6 literal */
235        host++;
236        p = strchr(host, ']');
237        if (!p)
238            goto parse_err;
239        *p = '\0';
240        p++;
241    }
242
243    /* Look for optional ':' for port number */
244    if ((p = strchr(p, ':'))) {
245        *p = 0;
246        port = p + 1;
247    } else {
248        /* Not found: set default port */
249        if (*pssl)
250            port = "443";
251        else
252            port = "80";
253    }
254
255    *pport = BUF_strdup(port);
256    if (!*pport)
257        goto mem_err;
258
259    *phost = BUF_strdup(host);
260
261    if (!*phost)
262        goto mem_err;
263
264    OPENSSL_free(buf);
265
266    return 1;
267
268 mem_err:
269    OCSPerr(OCSP_F_OCSP_PARSE_URL, ERR_R_MALLOC_FAILURE);
270    goto err;
271
272 parse_err:
273    OCSPerr(OCSP_F_OCSP_PARSE_URL, OCSP_R_ERROR_PARSING_URL);
274
275 err:
276    if (buf)
277        OPENSSL_free(buf);
278    if (*ppath)
279        OPENSSL_free(*ppath);
280    if (*pport)
281        OPENSSL_free(*pport);
282    if (*phost)
283        OPENSSL_free(*phost);
284    return 0;
285
286}
287