| /* |
| * Copyright 1999-2020 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * Licensed under the Apache License 2.0 (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| /* extension creation utilities */ |
| |
| #include <stdio.h> |
| #include "crypto/ctype.h" |
| #include "internal/cryptlib.h" |
| #include <openssl/conf.h> |
| #include <openssl/x509.h> |
| #include "crypto/x509.h" |
| #include <openssl/x509v3.h> |
| |
| DEFINE_STACK_OF(CONF_VALUE) |
| |
| static int v3_check_critical(const char **value); |
| static int v3_check_generic(const char **value); |
| static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid, |
| int crit, const char *value); |
| static X509_EXTENSION *v3_generic_extension(const char *ext, const char *value, |
| int crit, int type, |
| X509V3_CTX *ctx); |
| static char *conf_lhash_get_string(void *db, const char *section, const char *value); |
| static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, const 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(const char *value, X509V3_CTX *ctx, |
| long *ext_len); |
| |
| static X509_EXTENSION *X509V3_EXT_nconf_int(CONF *conf, X509V3_CTX *ctx, |
| const char *section, |
| const char *name, const 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(0, X509V3_R_ERROR_IN_EXTENSION); |
| if (section != NULL) |
| ERR_add_error_data(6, "section=", section, |
| ", name=", name, ", value=", value); |
| else |
| ERR_add_error_data(4, "name=", name, ", value=", value); |
| } |
| return ret; |
| } |
| |
| X509_EXTENSION *X509V3_EXT_nconf(CONF *conf, X509V3_CTX *ctx, const char *name, |
| const char *value) |
| { |
| return X509V3_EXT_nconf_int(conf, ctx, NULL, name, value); |
| } |
| |
| X509_EXTENSION *X509V3_EXT_nconf_nid(CONF *conf, X509V3_CTX *ctx, int ext_nid, |
| const 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, const 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)) == NULL) { |
| 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 (nval == NULL || 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); |
| if (*value != '@') |
| sk_CONF_VALUE_pop_free(nval, X509V3_conf_free); |
| 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)) == NULL) |
| 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)) == NULL) |
| 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 = NULL; |
| int ext_len; |
| ASN1_OCTET_STRING *ext_oct = NULL; |
| 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)) == NULL) |
| goto merr; |
| p = ext_der; |
| method->i2d(ext_struc, &p); |
| } |
| if ((ext_oct = ASN1_OCTET_STRING_new()) == NULL) |
| goto merr; |
| ext_oct->data = ext_der; |
| ext_der = NULL; |
| ext_oct->length = ext_len; |
| |
| ext = X509_EXTENSION_create_by_NID(NULL, ext_nid, crit, ext_oct); |
| if (!ext) |
| goto merr; |
| ASN1_OCTET_STRING_free(ext_oct); |
| |
| return ext; |
| |
| merr: |
| X509V3err(X509V3_F_DO_EXT_I2D, ERR_R_MALLOC_FAILURE); |
| OPENSSL_free(ext_der); |
| ASN1_OCTET_STRING_free(ext_oct); |
| 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)) == NULL) { |
| 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(const char **value) |
| { |
| const char *p = *value; |
| |
| if ((strlen(p) < 9) || strncmp(p, "critical,", 9)) |
| return 0; |
| p += 9; |
| while (ossl_isspace(*p)) |
| p++; |
| *value = p; |
| return 1; |
| } |
| |
| /* Check extension string for generic extension and return the type */ |
| static int v3_check_generic(const char **value) |
| { |
| int gen_type = 0; |
| const char *p = *value; |
| |
| if ((strlen(p) >= 4) && strncmp(p, "DER:", 4) == 0) { |
| p += 4; |
| gen_type = 1; |
| } else if ((strlen(p) >= 5) && strncmp(p, "ASN1:", 5) == 0) { |
| p += 5; |
| gen_type = 2; |
| } else |
| return 0; |
| |
| while (ossl_isspace(*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, const char *value, |
| int crit, int gen_type, |
| X509V3_CTX *ctx) |
| { |
| unsigned char *ext_der = NULL; |
| long ext_len = 0; |
| ASN1_OBJECT *obj = NULL; |
| ASN1_OCTET_STRING *oct = NULL; |
| X509_EXTENSION *extension = NULL; |
| |
| if ((obj = OBJ_txt2obj(ext, 0)) == NULL) { |
| 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 = OPENSSL_hexstr2buf(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 = ASN1_OCTET_STRING_new()) == NULL) { |
| 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); |
| ASN1_OCTET_STRING_free(oct); |
| OPENSSL_free(ext_der); |
| return extension; |
| |
| } |
| |
| static unsigned char *generic_asn1(const 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; |
| } |
| |
| static void delete_ext(STACK_OF(X509_EXTENSION) *sk, X509_EXTENSION *dext) |
| { |
| int idx; |
| ASN1_OBJECT *obj; |
| |
| obj = X509_EXTENSION_get_object(dext); |
| while ((idx = X509v3_get_ext_by_OBJ(sk, obj, -1)) >= 0) { |
| X509_EXTENSION *tmpext = X509v3_get_ext(sk, idx); |
| |
| X509v3_delete_ext(sk, idx); |
| X509_EXTENSION_free(tmpext); |
| } |
| } |
| |
| /* |
| * 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, const 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)) == NULL) |
| return 0; |
| for (i = 0; i < sk_CONF_VALUE_num(nval); i++) { |
| val = sk_CONF_VALUE_value(nval, i); |
| if ((ext = X509V3_EXT_nconf_int(conf, ctx, val->section, |
| val->name, val->value)) == NULL) |
| return 0; |
| if (ctx->flags == X509V3_CTX_REPLACE) |
| delete_ext(*sk, ext); |
| if (sk != NULL) { |
| if (X509v3_add_ext(sk, ext, -1) == NULL) { |
| X509_EXTENSION_free(ext); |
| return 0; |
| } |
| } |
| 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, const 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, const 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, const 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, const char *name, const 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, const 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, const char *section, const char *value) |
| { |
| return NCONF_get_string(db, section, value); |
| } |
| |
| static STACK_OF(CONF_VALUE) *nconf_get_section(void *db, const 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, |
| const char *name, const char *value) |
| { |
| CONF ctmp; |
| |
| CONF_set_nconf(&ctmp, conf); |
| return X509V3_EXT_nconf(&ctmp, ctx, name, value); |
| } |
| |
| X509_EXTENSION *X509V3_EXT_conf_nid(LHASH_OF(CONF_VALUE) *conf, |
| X509V3_CTX *ctx, int ext_nid, const 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, const char *section, const char *value) |
| { |
| return CONF_get_string(db, section, value); |
| } |
| |
| static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, const 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, |
| const 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, |
| const 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, |
| const char *section, X509_REQ *req) |
| { |
| CONF ctmp; |
| |
| CONF_set_nconf(&ctmp, conf); |
| return X509V3_EXT_REQ_add_nconf(&ctmp, ctx, section, req); |
| } |
