/* $OpenBSD: v3_pci.c,v 1.13 2017/05/02 04:11:08 deraadt Exp $ */ /* Contributed to the OpenSSL Project 2004 * by Richard Levitte (richard@levitte.org) */ /* Copyright (c) 2004 Kungliga Tekniska Högskolan * (Royal Institute of Technology, Stockholm, Sweden). * 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. Neither the name of the Institute nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS 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 INSTITUTE OR 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. */ #include #include #include #include #include static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *ext, BIO *out, int indent); static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method, X509V3_CTX *ctx, char *str); const X509V3_EXT_METHOD v3_pci = { .ext_nid = NID_proxyCertInfo, .ext_flags = 0, .it = &PROXY_CERT_INFO_EXTENSION_it, .ext_new = NULL, .ext_free = NULL, .d2i = NULL, .i2d = NULL, .i2s = NULL, .s2i = NULL, .i2v = NULL, .v2i = NULL, .i2r = (X509V3_EXT_I2R)i2r_pci, .r2i = (X509V3_EXT_R2I)r2i_pci, .usr_data = NULL, }; static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *pci, BIO *out, int indent) { BIO_printf(out, "%*sPath Length Constraint: ", indent, ""); if (pci->pcPathLengthConstraint) i2a_ASN1_INTEGER(out, pci->pcPathLengthConstraint); else BIO_printf(out, "infinite"); BIO_puts(out, "\n"); BIO_printf(out, "%*sPolicy Language: ", indent, ""); i2a_ASN1_OBJECT(out, pci->proxyPolicy->policyLanguage); BIO_puts(out, "\n"); if (pci->proxyPolicy->policy && pci->proxyPolicy->policy->data) BIO_printf(out, "%*sPolicy Text: %s\n", indent, "", pci->proxyPolicy->policy->data); return 1; } static int process_pci_value(CONF_VALUE *val, ASN1_OBJECT **language, ASN1_INTEGER **pathlen, ASN1_OCTET_STRING **policy) { int free_policy = 0; if (strcmp(val->name, "language") == 0) { if (*language) { X509V3error(X509V3_R_POLICY_LANGUAGE_ALREADY_DEFINED); X509V3_conf_err(val); return 0; } if (!(*language = OBJ_txt2obj(val->value, 0))) { X509V3error(X509V3_R_INVALID_OBJECT_IDENTIFIER); X509V3_conf_err(val); return 0; } } else if (strcmp(val->name, "pathlen") == 0) { if (*pathlen) { X509V3error(X509V3_R_POLICY_PATH_LENGTH_ALREADY_DEFINED); X509V3_conf_err(val); return 0; } if (!X509V3_get_value_int(val, pathlen)) { X509V3error(X509V3_R_POLICY_PATH_LENGTH); X509V3_conf_err(val); return 0; } } else if (strcmp(val->name, "policy") == 0) { unsigned char *tmp_data = NULL; long val_len; if (!*policy) { *policy = ASN1_OCTET_STRING_new(); if (!*policy) { X509V3error(ERR_R_MALLOC_FAILURE); X509V3_conf_err(val); return 0; } free_policy = 1; } if (strncmp(val->value, "hex:", 4) == 0) { unsigned char *tmp_data2 = string_to_hex(val->value + 4, &val_len); if (!tmp_data2) { X509V3error(X509V3_R_ILLEGAL_HEX_DIGIT); X509V3_conf_err(val); goto err; } tmp_data = realloc((*policy)->data, (*policy)->length + val_len + 1); if (tmp_data) { (*policy)->data = tmp_data; memcpy(&(*policy)->data[(*policy)->length], tmp_data2, val_len); (*policy)->length += val_len; (*policy)->data[(*policy)->length] = '\0'; } else { free(tmp_data2); free((*policy)->data); (*policy)->data = NULL; (*policy)->length = 0; X509V3error(ERR_R_MALLOC_FAILURE); X509V3_conf_err(val); goto err; } free(tmp_data2); } else if (strncmp(val->value, "file:", 5) == 0) { unsigned char buf[2048]; int n; BIO *b = BIO_new_file(val->value + 5, "r"); if (!b) { X509V3error(ERR_R_BIO_LIB); X509V3_conf_err(val); goto err; } while ((n = BIO_read(b, buf, sizeof(buf))) > 0 || (n == 0 && BIO_should_retry(b))) { if (!n) continue; tmp_data = realloc((*policy)->data, (*policy)->length + n + 1); if (!tmp_data) break; (*policy)->data = tmp_data; memcpy(&(*policy)->data[(*policy)->length], buf, n); (*policy)->length += n; (*policy)->data[(*policy)->length] = '\0'; } BIO_free_all(b); if (n < 0) { X509V3error(ERR_R_BIO_LIB); X509V3_conf_err(val); goto err; } } else if (strncmp(val->value, "text:", 5) == 0) { val_len = strlen(val->value + 5); tmp_data = realloc((*policy)->data, (*policy)->length + val_len + 1); if (tmp_data) { (*policy)->data = tmp_data; memcpy(&(*policy)->data[(*policy)->length], val->value + 5, val_len); (*policy)->length += val_len; (*policy)->data[(*policy)->length] = '\0'; } else { free((*policy)->data); (*policy)->data = NULL; (*policy)->length = 0; X509V3error(ERR_R_MALLOC_FAILURE); X509V3_conf_err(val); goto err; } } else { X509V3error(X509V3_R_INCORRECT_POLICY_SYNTAX_TAG); X509V3_conf_err(val); goto err; } if (!tmp_data) { X509V3error(ERR_R_MALLOC_FAILURE); X509V3_conf_err(val); goto err; } } return 1; err: if (free_policy) { ASN1_OCTET_STRING_free(*policy); *policy = NULL; } return 0; } static PROXY_CERT_INFO_EXTENSION * r2i_pci(X509V3_EXT_METHOD *method, X509V3_CTX *ctx, char *value) { PROXY_CERT_INFO_EXTENSION *pci = NULL; STACK_OF(CONF_VALUE) *vals; ASN1_OBJECT *language = NULL; ASN1_INTEGER *pathlen = NULL; ASN1_OCTET_STRING *policy = NULL; int i, j; vals = X509V3_parse_list(value); for (i = 0; i < sk_CONF_VALUE_num(vals); i++) { CONF_VALUE *cnf = sk_CONF_VALUE_value(vals, i); if (!cnf->name || (*cnf->name != '@' && !cnf->value)) { X509V3error(X509V3_R_INVALID_PROXY_POLICY_SETTING); X509V3_conf_err(cnf); goto err; } if (*cnf->name == '@') { STACK_OF(CONF_VALUE) *sect; int success_p = 1; sect = X509V3_get_section(ctx, cnf->name + 1); if (!sect) { X509V3error(X509V3_R_INVALID_SECTION); X509V3_conf_err(cnf); goto err; } for (j = 0; success_p && j < sk_CONF_VALUE_num(sect); j++) { success_p = process_pci_value( sk_CONF_VALUE_value(sect, j), &language, &pathlen, &policy); } X509V3_section_free(ctx, sect); if (!success_p) goto err; } else { if (!process_pci_value(cnf, &language, &pathlen, &policy)) { X509V3_conf_err(cnf); goto err; } } } /* Language is mandatory */ if (!language) { X509V3error(X509V3_R_NO_PROXY_CERT_POLICY_LANGUAGE_DEFINED); goto err; } i = OBJ_obj2nid(language); if ((i == NID_Independent || i == NID_id_ppl_inheritAll) && policy) { X509V3error(X509V3_R_POLICY_WHEN_PROXY_LANGUAGE_REQUIRES_NO_POLICY); goto err; } pci = PROXY_CERT_INFO_EXTENSION_new(); if (!pci) { X509V3error(ERR_R_MALLOC_FAILURE); goto err; } pci->proxyPolicy->policyLanguage = language; language = NULL; pci->proxyPolicy->policy = policy; policy = NULL; pci->pcPathLengthConstraint = pathlen; pathlen = NULL; goto end; err: ASN1_OBJECT_free(language); language = NULL; ASN1_INTEGER_free(pathlen); pathlen = NULL; ASN1_OCTET_STRING_free(policy); policy = NULL; end: sk_CONF_VALUE_pop_free(vals, X509V3_conf_free); return pci; }