/* v3_conf.c */ /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL * project 1999. */ /* ==================================================================== * Copyright (c) 1999-2002 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 * licensing@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). * */ /* extension creation utilities */ #include <stdio.h> #include <ctype.h> #include "cryptlib.h" #include <openssl/conf.h> #include <openssl/x509.h> #include <openssl/x509v3.h> static int v3_check_critical(char **value); static int v3_check_generic(char **value); static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid, int crit, char *value); static X509_EXTENSION *v3_generic_extension(const char *ext, char *value, int crit, int type, X509V3_CTX *ctx); static char *conf_lhash_get_string(void *db, char *section, char *value); static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, char *section); static X509_EXTENSION *do_ext_i2d(const X509V3_EXT_METHOD *method, int ext_nid, int crit, void *ext_struc); static unsigned char *generic_asn1(char *value, X509V3_CTX *ctx, long *ext_len); /* CONF *conf: Config file */ /* char *name: Name */ /* char *value: Value */ X509_EXTENSION *X509V3_EXT_nconf(CONF *conf, X509V3_CTX *ctx, char *name, char *value) { int crit; int ext_type; X509_EXTENSION *ret; crit = v3_check_critical(&value); if ((ext_type = v3_check_generic(&value))) return v3_generic_extension(name, value, crit, ext_type, ctx); ret = do_ext_nconf(conf, ctx, OBJ_sn2nid(name), crit, value); if (!ret) { X509V3err(X509V3_F_X509V3_EXT_NCONF,X509V3_R_ERROR_IN_EXTENSION); ERR_add_error_data(4,"name=", name, ", value=", value); } return ret; } /* CONF *conf: Config file */ /* char *value: Value */ X509_EXTENSION *X509V3_EXT_nconf_nid(CONF *conf, X509V3_CTX *ctx, int ext_nid, char *value) { int crit; int ext_type; crit = v3_check_critical(&value); if ((ext_type = v3_check_generic(&value))) return v3_generic_extension(OBJ_nid2sn(ext_nid), value, crit, ext_type, ctx); return do_ext_nconf(conf, ctx, ext_nid, crit, value); } /* CONF *conf: Config file */ /* char *value: Value */ static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid, int crit, char *value) { const X509V3_EXT_METHOD *method; X509_EXTENSION *ext; STACK_OF(CONF_VALUE) *nval; void *ext_struc; if (ext_nid == NID_undef) { X509V3err(X509V3_F_DO_EXT_NCONF,X509V3_R_UNKNOWN_EXTENSION_NAME); return NULL; } if (!(method = X509V3_EXT_get_nid(ext_nid))) { X509V3err(X509V3_F_DO_EXT_NCONF,X509V3_R_UNKNOWN_EXTENSION); return NULL; } /* Now get internal extension representation based on type */ if (method->v2i) { if(*value == '@') nval = NCONF_get_section(conf, value + 1); else nval = X509V3_parse_list(value); if(sk_CONF_VALUE_num(nval) <= 0) { X509V3err(X509V3_F_DO_EXT_NCONF,X509V3_R_INVALID_EXTENSION_STRING); ERR_add_error_data(4, "name=", OBJ_nid2sn(ext_nid), ",section=", value); return NULL; } ext_struc = method->v2i(method, ctx, nval); if(*value != '@') sk_CONF_VALUE_pop_free(nval, X509V3_conf_free); if(!ext_struc) return NULL; } else if(method->s2i) { if(!(ext_struc = method->s2i(method, ctx, value))) return NULL; } else if(method->r2i) { if(!ctx->db || !ctx->db_meth) { X509V3err(X509V3_F_DO_EXT_NCONF,X509V3_R_NO_CONFIG_DATABASE); return NULL; } if(!(ext_struc = method->r2i(method, ctx, value))) return NULL; } else { X509V3err(X509V3_F_DO_EXT_NCONF,X509V3_R_EXTENSION_SETTING_NOT_SUPPORTED); ERR_add_error_data(2, "name=", OBJ_nid2sn(ext_nid)); return NULL; } ext = do_ext_i2d(method, ext_nid, crit, ext_struc); if(method->it) ASN1_item_free(ext_struc, ASN1_ITEM_ptr(method->it)); else method->ext_free(ext_struc); return ext; } static X509_EXTENSION *do_ext_i2d(const X509V3_EXT_METHOD *method, int ext_nid, int crit, void *ext_struc) { unsigned char *ext_der; int ext_len; ASN1_OCTET_STRING *ext_oct; X509_EXTENSION *ext; /* Convert internal representation to DER */ if (method->it) { ext_der = NULL; ext_len = ASN1_item_i2d(ext_struc, &ext_der, ASN1_ITEM_ptr(method->it)); if (ext_len < 0) goto merr; } else { unsigned char *p; ext_len = method->i2d(ext_struc, NULL); if(!(ext_der = OPENSSL_malloc(ext_len))) goto merr; p = ext_der; method->i2d(ext_struc, &p); } if (!(ext_oct = M_ASN1_OCTET_STRING_new())) goto merr; ext_oct->data = ext_der; ext_oct->length = ext_len; ext = X509_EXTENSION_create_by_NID(NULL, ext_nid, crit, ext_oct); if (!ext) goto merr; M_ASN1_OCTET_STRING_free(ext_oct); return ext; merr: X509V3err(X509V3_F_DO_EXT_I2D,ERR_R_MALLOC_FAILURE); return NULL; } /* Given an internal structure, nid and critical flag create an extension */ X509_EXTENSION *X509V3_EXT_i2d(int ext_nid, int crit, void *ext_struc) { const X509V3_EXT_METHOD *method; if (!(method = X509V3_EXT_get_nid(ext_nid))) { X509V3err(X509V3_F_X509V3_EXT_I2D,X509V3_R_UNKNOWN_EXTENSION); return NULL; } return do_ext_i2d(method, ext_nid, crit, ext_struc); } /* Check the extension string for critical flag */ static int v3_check_critical(char **value) { char *p = *value; if ((strlen(p) < 9) || strncmp(p, "critical,", 9)) return 0; p+=9; while(isspace((unsigned char)*p)) p++; *value = p; return 1; } /* Check extension string for generic extension and return the type */ static int v3_check_generic(char **value) { int gen_type = 0; char *p = *value; if ((strlen(p) >= 4) && !strncmp(p, "DER:", 4)) { p+=4; gen_type = 1; } else if ((strlen(p) >= 5) && !strncmp(p, "ASN1:", 5)) { p+=5; gen_type = 2; } else return 0; while (isspace((unsigned char)*p)) p++; *value = p; return gen_type; } /* Create a generic extension: for now just handle DER type */ static X509_EXTENSION *v3_generic_extension(const char *ext, char *value, int crit, int gen_type, X509V3_CTX *ctx) { unsigned char *ext_der=NULL; long ext_len; ASN1_OBJECT *obj=NULL; ASN1_OCTET_STRING *oct=NULL; X509_EXTENSION *extension=NULL; if (!(obj = OBJ_txt2obj(ext, 0))) { X509V3err(X509V3_F_V3_GENERIC_EXTENSION,X509V3_R_EXTENSION_NAME_ERROR); ERR_add_error_data(2, "name=", ext); goto err; } if (gen_type == 1) ext_der = string_to_hex(value, &ext_len); else if (gen_type == 2) ext_der = generic_asn1(value, ctx, &ext_len); if (ext_der == NULL) { X509V3err(X509V3_F_V3_GENERIC_EXTENSION,X509V3_R_EXTENSION_VALUE_ERROR); ERR_add_error_data(2, "value=", value); goto err; } if (!(oct = M_ASN1_OCTET_STRING_new())) { X509V3err(X509V3_F_V3_GENERIC_EXTENSION,ERR_R_MALLOC_FAILURE); goto err; } oct->data = ext_der; oct->length = ext_len; ext_der = NULL; extension = X509_EXTENSION_create_by_OBJ(NULL, obj, crit, oct); err: ASN1_OBJECT_free(obj); M_ASN1_OCTET_STRING_free(oct); if(ext_der) OPENSSL_free(ext_der); return extension; } static unsigned char *generic_asn1(char *value, X509V3_CTX *ctx, long *ext_len) { ASN1_TYPE *typ; unsigned char *ext_der = NULL; typ = ASN1_generate_v3(value, ctx); if (typ == NULL) return NULL; *ext_len = i2d_ASN1_TYPE(typ, &ext_der); ASN1_TYPE_free(typ); return ext_der; } /* This is the main function: add a bunch of extensions based on a config file * section to an extension STACK. */ int X509V3_EXT_add_nconf_sk(CONF *conf, X509V3_CTX *ctx, char *section, STACK_OF(X509_EXTENSION) **sk) { X509_EXTENSION *ext; STACK_OF(CONF_VALUE) *nval; CONF_VALUE *val; int i; if (!(nval = NCONF_get_section(conf, section))) return 0; for (i = 0; i < sk_CONF_VALUE_num(nval); i++) { val = sk_CONF_VALUE_value(nval, i); if (!(ext = X509V3_EXT_nconf(conf, ctx, val->name, val->value))) return 0; if (sk) X509v3_add_ext(sk, ext, -1); X509_EXTENSION_free(ext); } return 1; } /* Convenience functions to add extensions to a certificate, CRL and request */ int X509V3_EXT_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section, X509 *cert) { STACK_OF(X509_EXTENSION) **sk = NULL; if (cert) sk = &cert->cert_info->extensions; return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk); } /* Same as above but for a CRL */ int X509V3_EXT_CRL_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section, X509_CRL *crl) { STACK_OF(X509_EXTENSION) **sk = NULL; if (crl) sk = &crl->crl->extensions; return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk); } /* Add extensions to certificate request */ int X509V3_EXT_REQ_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section, X509_REQ *req) { STACK_OF(X509_EXTENSION) *extlist = NULL, **sk = NULL; int i; if (req) sk = &extlist; i = X509V3_EXT_add_nconf_sk(conf, ctx, section, sk); if (!i || !sk) return i; i = X509_REQ_add_extensions(req, extlist); sk_X509_EXTENSION_pop_free(extlist, X509_EXTENSION_free); return i; } /* Config database functions */ char * X509V3_get_string(X509V3_CTX *ctx, char *name, char *section) { if(!ctx->db || !ctx->db_meth || !ctx->db_meth->get_string) { X509V3err(X509V3_F_X509V3_GET_STRING,X509V3_R_OPERATION_NOT_DEFINED); return NULL; } if (ctx->db_meth->get_string) return ctx->db_meth->get_string(ctx->db, name, section); return NULL; } STACK_OF(CONF_VALUE) * X509V3_get_section(X509V3_CTX *ctx, char *section) { if(!ctx->db || !ctx->db_meth || !ctx->db_meth->get_section) { X509V3err(X509V3_F_X509V3_GET_SECTION,X509V3_R_OPERATION_NOT_DEFINED); return NULL; } if (ctx->db_meth->get_section) return ctx->db_meth->get_section(ctx->db, section); return NULL; } void X509V3_string_free(X509V3_CTX *ctx, char *str) { if (!str) return; if (ctx->db_meth->free_string) ctx->db_meth->free_string(ctx->db, str); } void X509V3_section_free(X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *section) { if (!section) return; if (ctx->db_meth->free_section) ctx->db_meth->free_section(ctx->db, section); } static char *nconf_get_string(void *db, char *section, char *value) { return NCONF_get_string(db, section, value); } static STACK_OF(CONF_VALUE) *nconf_get_section(void *db, char *section) { return NCONF_get_section(db, section); } static X509V3_CONF_METHOD nconf_method = { nconf_get_string, nconf_get_section, NULL, NULL }; void X509V3_set_nconf(X509V3_CTX *ctx, CONF *conf) { ctx->db_meth = &nconf_method; ctx->db = conf; } void X509V3_set_ctx(X509V3_CTX *ctx, X509 *issuer, X509 *subj, X509_REQ *req, X509_CRL *crl, int flags) { ctx->issuer_cert = issuer; ctx->subject_cert = subj; ctx->crl = crl; ctx->subject_req = req; ctx->flags = flags; } /* Old conf compatibility functions */ X509_EXTENSION *X509V3_EXT_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx, char *name, char *value) { CONF ctmp; CONF_set_nconf(&ctmp, conf); return X509V3_EXT_nconf(&ctmp, ctx, name, value); } /* LHASH *conf: Config file */ /* char *value: Value */ X509_EXTENSION *X509V3_EXT_conf_nid(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx, int ext_nid, char *value) { CONF ctmp; CONF_set_nconf(&ctmp, conf); return X509V3_EXT_nconf_nid(&ctmp, ctx, ext_nid, value); } static char *conf_lhash_get_string(void *db, char *section, char *value) { return CONF_get_string(db, section, value); } static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, char *section) { return CONF_get_section(db, section); } static X509V3_CONF_METHOD conf_lhash_method = { conf_lhash_get_string, conf_lhash_get_section, NULL, NULL }; void X509V3_set_conf_lhash(X509V3_CTX *ctx, LHASH_OF(CONF_VALUE) *lhash) { ctx->db_meth = &conf_lhash_method; ctx->db = lhash; } int X509V3_EXT_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx, char *section, X509 *cert) { CONF ctmp; CONF_set_nconf(&ctmp, conf); return X509V3_EXT_add_nconf(&ctmp, ctx, section, cert); } /* Same as above but for a CRL */ int X509V3_EXT_CRL_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx, char *section, X509_CRL *crl) { CONF ctmp; CONF_set_nconf(&ctmp, conf); return X509V3_EXT_CRL_add_nconf(&ctmp, ctx, section, crl); } /* Add extensions to certificate request */ int X509V3_EXT_REQ_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx, char *section, X509_REQ *req) { CONF ctmp; CONF_set_nconf(&ctmp, conf); return X509V3_EXT_REQ_add_nconf(&ctmp, ctx, section, req); }