312 lines
8.3 KiB
C
Executable File
312 lines
8.3 KiB
C
Executable File
/* $OpenBSD: x509_pci.c,v 1.2 2021/08/24 15:23:03 tb Exp $ */
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/* Contributed to the OpenSSL Project 2004
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* by Richard Levitte (richard@levitte.org)
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*/
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/* Copyright (c) 2004 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <openssl/conf.h>
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#include <openssl/err.h>
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#include <openssl/x509v3.h>
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static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *ext,
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BIO *out, int indent);
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static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
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X509V3_CTX *ctx, char *str);
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const X509V3_EXT_METHOD v3_pci = {
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.ext_nid = NID_proxyCertInfo,
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.ext_flags = 0,
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.it = &PROXY_CERT_INFO_EXTENSION_it,
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.ext_new = NULL,
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.ext_free = NULL,
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.d2i = NULL,
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.i2d = NULL,
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.i2s = NULL,
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.s2i = NULL,
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.i2v = NULL,
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.v2i = NULL,
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.i2r = (X509V3_EXT_I2R)i2r_pci,
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.r2i = (X509V3_EXT_R2I)r2i_pci,
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.usr_data = NULL,
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};
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static int
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i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *pci, BIO *out,
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int indent)
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{
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BIO_printf(out, "%*sPath Length Constraint: ", indent, "");
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if (pci->pcPathLengthConstraint)
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i2a_ASN1_INTEGER(out, pci->pcPathLengthConstraint);
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else
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BIO_printf(out, "infinite");
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BIO_puts(out, "\n");
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BIO_printf(out, "%*sPolicy Language: ", indent, "");
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i2a_ASN1_OBJECT(out, pci->proxyPolicy->policyLanguage);
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BIO_puts(out, "\n");
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if (pci->proxyPolicy->policy && pci->proxyPolicy->policy->data)
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BIO_printf(out, "%*sPolicy Text: %.*s\n", indent, "",
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pci->proxyPolicy->policy->length,
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pci->proxyPolicy->policy->data);
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return 1;
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}
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static int
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process_pci_value(CONF_VALUE *val, ASN1_OBJECT **language,
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ASN1_INTEGER **pathlen, ASN1_OCTET_STRING **policy)
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{
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int free_policy = 0;
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if (strcmp(val->name, "language") == 0) {
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if (*language) {
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X509V3error(X509V3_R_POLICY_LANGUAGE_ALREADY_DEFINED);
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X509V3_conf_err(val);
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return 0;
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}
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if (!(*language = OBJ_txt2obj(val->value, 0))) {
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X509V3error(X509V3_R_INVALID_OBJECT_IDENTIFIER);
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X509V3_conf_err(val);
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return 0;
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}
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}
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else if (strcmp(val->name, "pathlen") == 0) {
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if (*pathlen) {
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X509V3error(X509V3_R_POLICY_PATH_LENGTH_ALREADY_DEFINED);
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X509V3_conf_err(val);
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return 0;
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}
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if (!X509V3_get_value_int(val, pathlen)) {
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X509V3error(X509V3_R_POLICY_PATH_LENGTH);
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X509V3_conf_err(val);
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return 0;
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}
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}
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else if (strcmp(val->name, "policy") == 0) {
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unsigned char *tmp_data = NULL;
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long val_len;
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if (!*policy) {
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*policy = ASN1_OCTET_STRING_new();
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if (!*policy) {
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X509V3error(ERR_R_MALLOC_FAILURE);
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X509V3_conf_err(val);
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return 0;
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}
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free_policy = 1;
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}
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if (strncmp(val->value, "hex:", 4) == 0) {
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unsigned char *tmp_data2 =
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string_to_hex(val->value + 4, &val_len);
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if (!tmp_data2) {
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X509V3error(X509V3_R_ILLEGAL_HEX_DIGIT);
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X509V3_conf_err(val);
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goto err;
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}
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tmp_data = realloc((*policy)->data,
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(*policy)->length + val_len + 1);
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if (tmp_data) {
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(*policy)->data = tmp_data;
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memcpy(&(*policy)->data[(*policy)->length],
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tmp_data2, val_len);
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(*policy)->length += val_len;
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(*policy)->data[(*policy)->length] = '\0';
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} else {
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free(tmp_data2);
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free((*policy)->data);
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(*policy)->data = NULL;
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(*policy)->length = 0;
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X509V3error(ERR_R_MALLOC_FAILURE);
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X509V3_conf_err(val);
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goto err;
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}
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free(tmp_data2);
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}
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else if (strncmp(val->value, "file:", 5) == 0) {
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unsigned char buf[2048];
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int n;
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BIO *b = BIO_new_file(val->value + 5, "r");
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if (!b) {
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X509V3error(ERR_R_BIO_LIB);
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X509V3_conf_err(val);
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goto err;
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}
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while ((n = BIO_read(b, buf, sizeof(buf))) > 0 ||
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(n == 0 && BIO_should_retry(b))) {
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if (!n)
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continue;
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tmp_data = realloc((*policy)->data,
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(*policy)->length + n + 1);
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if (!tmp_data)
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break;
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(*policy)->data = tmp_data;
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memcpy(&(*policy)->data[(*policy)->length],
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buf, n);
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(*policy)->length += n;
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(*policy)->data[(*policy)->length] = '\0';
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}
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BIO_free_all(b);
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if (n < 0) {
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X509V3error(ERR_R_BIO_LIB);
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X509V3_conf_err(val);
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goto err;
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}
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}
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else if (strncmp(val->value, "text:", 5) == 0) {
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val_len = strlen(val->value + 5);
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tmp_data = realloc((*policy)->data,
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(*policy)->length + val_len + 1);
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if (tmp_data) {
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(*policy)->data = tmp_data;
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memcpy(&(*policy)->data[(*policy)->length],
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val->value + 5, val_len);
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(*policy)->length += val_len;
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(*policy)->data[(*policy)->length] = '\0';
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} else {
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free((*policy)->data);
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(*policy)->data = NULL;
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(*policy)->length = 0;
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X509V3error(ERR_R_MALLOC_FAILURE);
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X509V3_conf_err(val);
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goto err;
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}
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} else {
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X509V3error(X509V3_R_INCORRECT_POLICY_SYNTAX_TAG);
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X509V3_conf_err(val);
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goto err;
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}
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if (!tmp_data) {
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X509V3error(ERR_R_MALLOC_FAILURE);
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X509V3_conf_err(val);
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goto err;
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}
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}
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return 1;
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err:
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if (free_policy) {
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ASN1_OCTET_STRING_free(*policy);
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*policy = NULL;
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}
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return 0;
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}
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static PROXY_CERT_INFO_EXTENSION *
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r2i_pci(X509V3_EXT_METHOD *method, X509V3_CTX *ctx, char *value)
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{
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PROXY_CERT_INFO_EXTENSION *pci = NULL;
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STACK_OF(CONF_VALUE) *vals;
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ASN1_OBJECT *language = NULL;
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ASN1_INTEGER *pathlen = NULL;
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ASN1_OCTET_STRING *policy = NULL;
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int i, j;
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vals = X509V3_parse_list(value);
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for (i = 0; i < sk_CONF_VALUE_num(vals); i++) {
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CONF_VALUE *cnf = sk_CONF_VALUE_value(vals, i);
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if (!cnf->name || (*cnf->name != '@' && !cnf->value)) {
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X509V3error(X509V3_R_INVALID_PROXY_POLICY_SETTING);
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X509V3_conf_err(cnf);
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goto err;
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}
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if (*cnf->name == '@') {
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STACK_OF(CONF_VALUE) *sect;
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int success_p = 1;
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sect = X509V3_get_section(ctx, cnf->name + 1);
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if (!sect) {
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X509V3error(X509V3_R_INVALID_SECTION);
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X509V3_conf_err(cnf);
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goto err;
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}
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for (j = 0; success_p &&
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j < sk_CONF_VALUE_num(sect); j++) {
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success_p = process_pci_value(
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sk_CONF_VALUE_value(sect, j),
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&language, &pathlen, &policy);
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}
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X509V3_section_free(ctx, sect);
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if (!success_p)
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goto err;
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} else {
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if (!process_pci_value(cnf,
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&language, &pathlen, &policy)) {
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X509V3_conf_err(cnf);
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goto err;
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}
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}
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}
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/* Language is mandatory */
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if (!language) {
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X509V3error(X509V3_R_NO_PROXY_CERT_POLICY_LANGUAGE_DEFINED);
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goto err;
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}
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i = OBJ_obj2nid(language);
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if ((i == NID_Independent || i == NID_id_ppl_inheritAll) && policy) {
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X509V3error(X509V3_R_POLICY_WHEN_PROXY_LANGUAGE_REQUIRES_NO_POLICY);
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goto err;
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}
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pci = PROXY_CERT_INFO_EXTENSION_new();
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if (!pci) {
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X509V3error(ERR_R_MALLOC_FAILURE);
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goto err;
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}
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pci->proxyPolicy->policyLanguage = language;
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language = NULL;
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pci->proxyPolicy->policy = policy;
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policy = NULL;
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pci->pcPathLengthConstraint = pathlen;
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pathlen = NULL;
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goto end;
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err:
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ASN1_OBJECT_free(language);
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language = NULL;
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ASN1_INTEGER_free(pathlen);
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pathlen = NULL;
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ASN1_OCTET_STRING_free(policy);
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policy = NULL;
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end:
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sk_CONF_VALUE_pop_free(vals, X509V3_conf_free);
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return pci;
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}
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