/src/openssl31/crypto/x509/v3_conf.c

Source (jump to first uncovered line)
/*
 * Copyright 1999-2021 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>

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) {
        if (section != NULL)
            ERR_raise_data(ERR_LIB_X509V3, X509V3_R_ERROR_IN_EXTENSION,
                           "section=%s, name=%s, value=%s",
                           section, name, value);
        else
            ERR_raise_data(ERR_LIB_X509V3, X509V3_R_ERROR_IN_EXTENSION,
                           "name=%s, value=%s", name, 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) {
        ERR_raise(ERR_LIB_X509V3, X509V3_R_UNKNOWN_EXTENSION_NAME);
        return NULL;
    }
    if ((method = X509V3_EXT_get_nid(ext_nid)) == NULL) {
        ERR_raise(ERR_LIB_X509V3, 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) {
            ERR_raise_data(ERR_LIB_X509V3, X509V3_R_INVALID_EXTENSION_STRING,
                           "name=%s,section=%s", OBJ_nid2sn(ext_nid), 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) {
            ERR_raise(ERR_LIB_X509V3, X509V3_R_NO_CONFIG_DATABASE);
            return NULL;
        }
        if ((ext_struc = method->r2i(method, ctx, value)) == NULL)
            return NULL;
    } else {
        ERR_raise_data(ERR_LIB_X509V3, X509V3_R_EXTENSION_SETTING_NOT_SUPPORTED,
                       "name=%s", 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_len <= 0)
            goto merr;
        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:
    ERR_raise(ERR_LIB_X509V3, 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) {
        ERR_raise(ERR_LIB_X509V3, 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) {
        ERR_raise_data(ERR_LIB_X509V3, X509V3_R_EXTENSION_NAME_ERROR,
                       "name=%s", 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) {
        ERR_raise_data(ERR_LIB_X509V3, X509V3_R_EXTENSION_VALUE_ERROR,
                       "value=%s", value);
        goto err;
    }

    if ((oct = ASN1_OCTET_STRING_new()) == NULL) {
        ERR_raise(ERR_LIB_X509V3, 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_free(X509v3_delete_ext(sk, idx));
}

/*
 * This is the main function: add a bunch of extensions based on a config
 * file section to an extension STACK. Just check in case sk == NULL.
 * Note that on error new elements may have been added to *sk if sk != NULL.
 */
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 (sk != NULL) {
            if (ctx->flags == X509V3_CTX_REPLACE)
                delete_ext(*sk, ext);
            if (X509v3_add_ext(sk, ext, -1) == NULL) {
                X509_EXTENSION_free(ext);
                return 0;
            }
        }
        X509_EXTENSION_free(ext);
    }
    return 1;
}

/*
 * Add extensions to a certificate. Just check in case cert == NULL.
 * Note that on error new elements may remain added to cert if cert != NULL.
 */
int X509V3_EXT_add_nconf(CONF *conf, X509V3_CTX *ctx, const char *section,
                         X509 *cert)
{
    STACK_OF(X509_EXTENSION) **sk = NULL;
    if (cert != NULL)
        sk = &cert->cert_info.extensions;
    return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
}

/*
 * Add extensions to a CRL. Just check in case crl == NULL.
 * Note that on error new elements may remain added to crl if crl != NULL.
 */
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 != NULL)
        sk = &crl->crl.extensions;
    return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
}

/*
 * Add extensions to certificate request. Just check in case req is NULL.
 * Note that on error new elements may remain added to req if req != NULL.
 */
int X509V3_EXT_REQ_add_nconf(CONF *conf, X509V3_CTX *ctx, const char *section,
                             X509_REQ *req)
{
    STACK_OF(X509_EXTENSION) *exts = NULL;
    int ret = X509V3_EXT_add_nconf_sk(conf, ctx, section, &exts);

    if (ret && req != NULL && exts != NULL)
        ret = X509_REQ_add_extensions(req, exts);
    sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
    return ret;
}

/* 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) {
        ERR_raise(ERR_LIB_X509V3, 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) {
        ERR_raise(ERR_LIB_X509V3, 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)
{
    if (ctx == NULL) {
        ERR_raise(ERR_LIB_X509V3, ERR_R_PASSED_NULL_PARAMETER);
        return;
    }
    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)
{
    if (ctx == NULL) {
        ERR_raise(ERR_LIB_X509V3, ERR_R_PASSED_NULL_PARAMETER);
        return;
    }
    ctx->flags = flags;
    ctx->issuer_cert = issuer;
    ctx->subject_cert = subj;
    ctx->subject_req = req;
    ctx->crl = crl;
    ctx->db_meth = NULL;
    ctx->db = NULL;
    ctx->issuer_pkey = NULL;
}

/* For API backward compatibility, this is separate from X509V3_set_ctx() */
int X509V3_set_issuer_pkey(X509V3_CTX *ctx, EVP_PKEY *pkey)
{
    if (ctx == NULL) {
        ERR_raise(ERR_LIB_X509V3, ERR_R_PASSED_NULL_PARAMETER);
        return 0;
    }
    if (ctx->subject_cert == NULL && pkey != NULL) {
        ERR_raise(ERR_LIB_X509V3, ERR_R_PASSED_INVALID_ARGUMENT);
        return 0;
    }
    ctx->issuer_pkey = pkey;
    return 1;
}

/* 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;
    X509_EXTENSION *ret;

    if ((ctmp = NCONF_new(NULL)) == NULL)
        return NULL;
    CONF_set_nconf(ctmp, conf);
    ret = X509V3_EXT_nconf(ctmp, ctx, name, value);
    CONF_set_nconf(ctmp, NULL);
    NCONF_free(ctmp);
    return ret;
}

X509_EXTENSION *X509V3_EXT_conf_nid(LHASH_OF(CONF_VALUE) *conf,
                                    X509V3_CTX *ctx, int ext_nid, const char *value)
{
    CONF *ctmp;
    X509_EXTENSION *ret;

    if ((ctmp = NCONF_new(NULL)) == NULL)
        return NULL;
    CONF_set_nconf(ctmp, conf);
    ret = X509V3_EXT_nconf_nid(ctmp, ctx, ext_nid, value);
    CONF_set_nconf(ctmp, NULL);
    NCONF_free(ctmp);
    return ret;
}

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)
{
    if (ctx == NULL) {
        ERR_raise(ERR_LIB_X509V3, ERR_R_PASSED_NULL_PARAMETER);
        return;
    }
    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;
    int ret;

    if ((ctmp = NCONF_new(NULL)) == NULL)
        return 0;
    CONF_set_nconf(ctmp, conf);
    ret = X509V3_EXT_add_nconf(ctmp, ctx, section, cert);
    CONF_set_nconf(ctmp, NULL);
    NCONF_free(ctmp);
    return ret;
}

/* 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;
    int ret;

    if ((ctmp = NCONF_new(NULL)) == NULL)
        return 0;
    CONF_set_nconf(ctmp, conf);
    ret = X509V3_EXT_CRL_add_nconf(ctmp, ctx, section, crl);
    CONF_set_nconf(ctmp, NULL);
    NCONF_free(ctmp);
    return ret;
}

/* 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;
    int ret;

    if ((ctmp = NCONF_new(NULL)) == NULL)
        return 0;
    CONF_set_nconf(ctmp, conf);
    ret = X509V3_EXT_REQ_add_nconf(ctmp, ctx, section, req);
    CONF_set_nconf(ctmp, NULL);
    NCONF_free(ctmp);
    return ret;
}

Coverage Report

Created: 2025-06-13 06:58

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 1999-2021 The OpenSSL Project Authors. All Rights Reserved.
3		*
4		* Licensed under the Apache License 2.0 (the "License"). You may not use
5		* this file except in compliance with the License. You can obtain a copy
6		* in the file LICENSE in the source distribution or at
7		* https://www.openssl.org/source/license.html
8		*/
9
10		/* extension creation utilities */
11
12		#include <stdio.h>
13		#include "crypto/ctype.h"
14		#include "internal/cryptlib.h"
15		#include <openssl/conf.h>
16		#include <openssl/x509.h>
17		#include "crypto/x509.h"
18		#include <openssl/x509v3.h>
19
20		static int v3_check_critical(const char **value);
21		static int v3_check_generic(const char **value);
22		static X509_EXTENSION do_ext_nconf(CONF conf, X509V3_CTX *ctx, int ext_nid,
23		int crit, const char *value);
24		static X509_EXTENSION v3_generic_extension(const char ext, const char *value,
25		int crit, int type,
26		X509V3_CTX *ctx);
27		static char conf_lhash_get_string(void db, const char section, const char value);
28		static STACK_OF(CONF_VALUE) conf_lhash_get_section(void db, const char *section);
29		static X509_EXTENSION do_ext_i2d(const X509V3_EXT_METHOD method,
30		int ext_nid, int crit, void *ext_struc);
31		static unsigned char generic_asn1(const char value, X509V3_CTX *ctx,
32		long *ext_len);
33
34		static X509_EXTENSION X509V3_EXT_nconf_int(CONF conf, X509V3_CTX *ctx,
35		const char *section,
36		const char name, const char value)
37	0	{
38	0	int crit;
39	0	int ext_type;
40	0	X509_EXTENSION *ret;
41
42	0	crit = v3_check_critical(&value);
43	0	if ((ext_type = v3_check_generic(&value)))
44	0	return v3_generic_extension(name, value, crit, ext_type, ctx);
45	0	ret = do_ext_nconf(conf, ctx, OBJ_sn2nid(name), crit, value);
46	0	if (!ret) {
47	0	if (section != NULL)
48	0	ERR_raise_data(ERR_LIB_X509V3, X509V3_R_ERROR_IN_EXTENSION,
49	0	"section=%s, name=%s, value=%s",
50	0	section, name, value);
51	0	else
52	0	ERR_raise_data(ERR_LIB_X509V3, X509V3_R_ERROR_IN_EXTENSION,
53	0	"name=%s, value=%s", name, value);
54	0	}
55	0	return ret;
56	0	}
57
58		X509_EXTENSION X509V3_EXT_nconf(CONF conf, X509V3_CTX ctx, const char name,
59		const char *value)
60	0	{
61	0	return X509V3_EXT_nconf_int(conf, ctx, NULL, name, value);
62	0	}
63
64		X509_EXTENSION X509V3_EXT_nconf_nid(CONF conf, X509V3_CTX *ctx, int ext_nid,
65		const char *value)
66	0	{
67	0	int crit;
68	0	int ext_type;
69
70	0	crit = v3_check_critical(&value);
71	0	if ((ext_type = v3_check_generic(&value)))
72	0	return v3_generic_extension(OBJ_nid2sn(ext_nid),
73	0	value, crit, ext_type, ctx);
74	0	return do_ext_nconf(conf, ctx, ext_nid, crit, value);
75	0	}
76
77		/* CONF conf: Config file /
78		/* char value: Value /
79		static X509_EXTENSION do_ext_nconf(CONF conf, X509V3_CTX *ctx, int ext_nid,
80		int crit, const char *value)
81	0	{
82	0	const X509V3_EXT_METHOD *method;
83	0	X509_EXTENSION *ext;
84	0	STACK_OF(CONF_VALUE) *nval;
85	0	void *ext_struc;
86
87	0	if (ext_nid == NID_undef) {
88	0	ERR_raise(ERR_LIB_X509V3, X509V3_R_UNKNOWN_EXTENSION_NAME);
89	0	return NULL;
90	0	}
91	0	if ((method = X509V3_EXT_get_nid(ext_nid)) == NULL) {
92	0	ERR_raise(ERR_LIB_X509V3, X509V3_R_UNKNOWN_EXTENSION);
93	0	return NULL;
94	0	}
95		/* Now get internal extension representation based on type */
96	0	if (method->v2i) {
97	0	if (*value == '@')
98	0	nval = NCONF_get_section(conf, value + 1);
99	0	else
100	0	nval = X509V3_parse_list(value);
101	0	if (nval == NULL \|\| sk_CONF_VALUE_num(nval) <= 0) {
102	0	ERR_raise_data(ERR_LIB_X509V3, X509V3_R_INVALID_EXTENSION_STRING,
103	0	"name=%s,section=%s", OBJ_nid2sn(ext_nid), value);
104	0	if (*value != '@')
105	0	sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);
106	0	return NULL;
107	0	}
108	0	ext_struc = method->v2i(method, ctx, nval);
109	0	if (*value != '@')
110	0	sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);
111	0	if (!ext_struc)
112	0	return NULL;
113	0	} else if (method->s2i) {
114	0	if ((ext_struc = method->s2i(method, ctx, value)) == NULL)
115	0	return NULL;
116	0	} else if (method->r2i) {
117	0	if (!ctx->db \|\| !ctx->db_meth) {
118	0	ERR_raise(ERR_LIB_X509V3, X509V3_R_NO_CONFIG_DATABASE);
119	0	return NULL;
120	0	}
121	0	if ((ext_struc = method->r2i(method, ctx, value)) == NULL)
122	0	return NULL;
123	0	} else {
124	0	ERR_raise_data(ERR_LIB_X509V3, X509V3_R_EXTENSION_SETTING_NOT_SUPPORTED,
125	0	"name=%s", OBJ_nid2sn(ext_nid));
126	0	return NULL;
127	0	}
128
129	0	ext = do_ext_i2d(method, ext_nid, crit, ext_struc);
130	0	if (method->it)
131	0	ASN1_item_free(ext_struc, ASN1_ITEM_ptr(method->it));
132	0	else
133	0	method->ext_free(ext_struc);
134	0	return ext;
135
136	0	}
137
138		static X509_EXTENSION do_ext_i2d(const X509V3_EXT_METHOD method,
139		int ext_nid, int crit, void *ext_struc)
140	0	{
141	0	unsigned char *ext_der = NULL;
142	0	int ext_len;
143	0	ASN1_OCTET_STRING *ext_oct = NULL;
144	0	X509_EXTENSION *ext;
145
146		/* Convert internal representation to DER */
147	0	if (method->it) {
148	0	ext_der = NULL;
149	0	ext_len =
150	0	ASN1_item_i2d(ext_struc, &ext_der, ASN1_ITEM_ptr(method->it));
151	0	if (ext_len < 0)
152	0	goto merr;
153	0	} else {
154	0	unsigned char *p;
155
156	0	ext_len = method->i2d(ext_struc, NULL);
157	0	if (ext_len <= 0)
158	0	goto merr;
159	0	if ((ext_der = OPENSSL_malloc(ext_len)) == NULL)
160	0	goto merr;
161	0	p = ext_der;
162	0	method->i2d(ext_struc, &p);
163	0	}
164	0	if ((ext_oct = ASN1_OCTET_STRING_new()) == NULL)
165	0	goto merr;
166	0	ext_oct->data = ext_der;
167	0	ext_der = NULL;
168	0	ext_oct->length = ext_len;
169
170	0	ext = X509_EXTENSION_create_by_NID(NULL, ext_nid, crit, ext_oct);
171	0	if (!ext)
172	0	goto merr;
173	0	ASN1_OCTET_STRING_free(ext_oct);
174
175	0	return ext;
176
177	0	merr:
178	0	ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
179	0	OPENSSL_free(ext_der);
180	0	ASN1_OCTET_STRING_free(ext_oct);
181	0	return NULL;
182
183	0	}
184
185		/* Given an internal structure, nid and critical flag create an extension */
186
187		X509_EXTENSION X509V3_EXT_i2d(int ext_nid, int crit, void ext_struc)
188	0	{
189	0	const X509V3_EXT_METHOD *method;
190
191	0	if ((method = X509V3_EXT_get_nid(ext_nid)) == NULL) {
192	0	ERR_raise(ERR_LIB_X509V3, X509V3_R_UNKNOWN_EXTENSION);
193	0	return NULL;
194	0	}
195	0	return do_ext_i2d(method, ext_nid, crit, ext_struc);
196	0	}
197
198		/* Check the extension string for critical flag */
199		static int v3_check_critical(const char **value)
200	0	{
201	0	const char p = value;
202
203	0	if ((strlen(p) < 9) \|\| strncmp(p, "critical,", 9))
204	0	return 0;
205	0	p += 9;
206	0	while (ossl_isspace(*p))
207	0	p++;
208	0	*value = p;
209	0	return 1;
210	0	}
211
212		/* Check extension string for generic extension and return the type */
213		static int v3_check_generic(const char **value)
214	0	{
215	0	int gen_type = 0;
216	0	const char p = value;
217
218	0	if ((strlen(p) >= 4) && strncmp(p, "DER:", 4) == 0) {
219	0	p += 4;
220	0	gen_type = 1;
221	0	} else if ((strlen(p) >= 5) && strncmp(p, "ASN1:", 5) == 0) {
222	0	p += 5;
223	0	gen_type = 2;
224	0	} else
225	0	return 0;
226
227	0	while (ossl_isspace(*p))
228	0	p++;
229	0	*value = p;
230	0	return gen_type;
231	0	}
232
233		/* Create a generic extension: for now just handle DER type */
234		static X509_EXTENSION v3_generic_extension(const char ext, const char *value,
235		int crit, int gen_type,
236		X509V3_CTX *ctx)
237	0	{
238	0	unsigned char *ext_der = NULL;
239	0	long ext_len = 0;
240	0	ASN1_OBJECT *obj = NULL;
241	0	ASN1_OCTET_STRING *oct = NULL;
242	0	X509_EXTENSION *extension = NULL;
243
244	0	if ((obj = OBJ_txt2obj(ext, 0)) == NULL) {
245	0	ERR_raise_data(ERR_LIB_X509V3, X509V3_R_EXTENSION_NAME_ERROR,
246	0	"name=%s", ext);
247	0	goto err;
248	0	}
249
250	0	if (gen_type == 1)
251	0	ext_der = OPENSSL_hexstr2buf(value, &ext_len);
252	0	else if (gen_type == 2)
253	0	ext_der = generic_asn1(value, ctx, &ext_len);
254
255	0	if (ext_der == NULL) {
256	0	ERR_raise_data(ERR_LIB_X509V3, X509V3_R_EXTENSION_VALUE_ERROR,
257	0	"value=%s", value);
258	0	goto err;
259	0	}
260
261	0	if ((oct = ASN1_OCTET_STRING_new()) == NULL) {
262	0	ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
263	0	goto err;
264	0	}
265
266	0	oct->data = ext_der;
267	0	oct->length = ext_len;
268	0	ext_der = NULL;
269
270	0	extension = X509_EXTENSION_create_by_OBJ(NULL, obj, crit, oct);
271
272	0	err:
273	0	ASN1_OBJECT_free(obj);
274	0	ASN1_OCTET_STRING_free(oct);
275	0	OPENSSL_free(ext_der);
276	0	return extension;
277
278	0	}
279
280		static unsigned char generic_asn1(const char value, X509V3_CTX *ctx,
281		long *ext_len)
282	0	{
283	0	ASN1_TYPE *typ;
284	0	unsigned char *ext_der = NULL;
285
286	0	typ = ASN1_generate_v3(value, ctx);
287	0	if (typ == NULL)
288	0	return NULL;
289	0	*ext_len = i2d_ASN1_TYPE(typ, &ext_der);
290	0	ASN1_TYPE_free(typ);
291	0	return ext_der;
292	0	}
293
294		static void delete_ext(STACK_OF(X509_EXTENSION) sk, X509_EXTENSION dext)
295	0	{
296	0	int idx;
297	0	ASN1_OBJECT *obj;
298
299	0	obj = X509_EXTENSION_get_object(dext);
300	0	while ((idx = X509v3_get_ext_by_OBJ(sk, obj, -1)) >= 0)
301	0	X509_EXTENSION_free(X509v3_delete_ext(sk, idx));
302	0	}
303
304		/*
305		* This is the main function: add a bunch of extensions based on a config
306		* file section to an extension STACK. Just check in case sk == NULL.
307		* Note that on error new elements may have been added to *sk if sk != NULL.
308		*/
309		int X509V3_EXT_add_nconf_sk(CONF conf, X509V3_CTX ctx, const char *section,
310		STACK_OF(X509_EXTENSION) **sk)
311	0	{
312	0	X509_EXTENSION *ext;
313	0	STACK_OF(CONF_VALUE) *nval;
314	0	CONF_VALUE *val;
315	0	int i;
316
317	0	if ((nval = NCONF_get_section(conf, section)) == NULL)
318	0	return 0;
319	0	for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
320	0	val = sk_CONF_VALUE_value(nval, i);
321	0	if ((ext = X509V3_EXT_nconf_int(conf, ctx, val->section,
322	0	val->name, val->value)) == NULL)
323	0	return 0;
324	0	if (sk != NULL) {
325	0	if (ctx->flags == X509V3_CTX_REPLACE)
326	0	delete_ext(*sk, ext);
327	0	if (X509v3_add_ext(sk, ext, -1) == NULL) {
328	0	X509_EXTENSION_free(ext);
329	0	return 0;
330	0	}
331	0	}
332	0	X509_EXTENSION_free(ext);
333	0	}
334	0	return 1;
335	0	}
336
337		/*
338		* Add extensions to a certificate. Just check in case cert == NULL.
339		* Note that on error new elements may remain added to cert if cert != NULL.
340		*/
341		int X509V3_EXT_add_nconf(CONF conf, X509V3_CTX ctx, const char *section,
342		X509 *cert)
343	0	{
344	0	STACK_OF(X509_EXTENSION) **sk = NULL;
345	0	if (cert != NULL)
346	0	sk = &cert->cert_info.extensions;
347	0	return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
348	0	}
349
350		/*
351		* Add extensions to a CRL. Just check in case crl == NULL.
352		* Note that on error new elements may remain added to crl if crl != NULL.
353		*/
354		int X509V3_EXT_CRL_add_nconf(CONF conf, X509V3_CTX ctx, const char *section,
355		X509_CRL *crl)
356	0	{
357	0	STACK_OF(X509_EXTENSION) **sk = NULL;
358	0	if (crl != NULL)
359	0	sk = &crl->crl.extensions;
360	0	return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
361	0	}
362
363		/*
364		* Add extensions to certificate request. Just check in case req is NULL.
365		* Note that on error new elements may remain added to req if req != NULL.
366		*/
367		int X509V3_EXT_REQ_add_nconf(CONF conf, X509V3_CTX ctx, const char *section,
368		X509_REQ *req)
369	0	{
370	0	STACK_OF(X509_EXTENSION) *exts = NULL;
371	0	int ret = X509V3_EXT_add_nconf_sk(conf, ctx, section, &exts);
372
373	0	if (ret && req != NULL && exts != NULL)
374	0	ret = X509_REQ_add_extensions(req, exts);
375	0	sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
376	0	return ret;
377	0	}
378
379		/* Config database functions */
380
381		char X509V3_get_string(X509V3_CTX ctx, const char name, const char section)
382	0	{
383	0	if (!ctx->db \|\| !ctx->db_meth \|\| !ctx->db_meth->get_string) {
384	0	ERR_raise(ERR_LIB_X509V3, X509V3_R_OPERATION_NOT_DEFINED);
385	0	return NULL;
386	0	}
387	0	if (ctx->db_meth->get_string)
388	0	return ctx->db_meth->get_string(ctx->db, name, section);
389	0	return NULL;
390	0	}
391
392		STACK_OF(CONF_VALUE) X509V3_get_section(X509V3_CTX ctx, const char *section)
393	0	{
394	0	if (!ctx->db \|\| !ctx->db_meth \|\| !ctx->db_meth->get_section) {
395	0	ERR_raise(ERR_LIB_X509V3, X509V3_R_OPERATION_NOT_DEFINED);
396	0	return NULL;
397	0	}
398	0	if (ctx->db_meth->get_section)
399	0	return ctx->db_meth->get_section(ctx->db, section);
400	0	return NULL;
401	0	}
402
403		void X509V3_string_free(X509V3_CTX ctx, char str)
404	0	{
405	0	if (!str)
406	0	return;
407	0	if (ctx->db_meth->free_string)
408	0	ctx->db_meth->free_string(ctx->db, str);
409	0	}
410
411		void X509V3_section_free(X509V3_CTX ctx, STACK_OF(CONF_VALUE) section)
412	0	{
413	0	if (!section)
414	0	return;
415	0	if (ctx->db_meth->free_section)
416	0	ctx->db_meth->free_section(ctx->db, section);
417	0	}
418
419		static char nconf_get_string(void db, const char section, const char value)
420	0	{
421	0	return NCONF_get_string(db, section, value);
422	0	}
423
424		static STACK_OF(CONF_VALUE) nconf_get_section(void db, const char *section)
425	0	{
426	0	return NCONF_get_section(db, section);
427	0	}
428
429		static X509V3_CONF_METHOD nconf_method = {
430		nconf_get_string,
431		nconf_get_section,
432		NULL,
433		NULL
434		};
435
436		void X509V3_set_nconf(X509V3_CTX ctx, CONF conf)
437	0	{
438	0	if (ctx == NULL) {
439	0	ERR_raise(ERR_LIB_X509V3, ERR_R_PASSED_NULL_PARAMETER);
440	0	return;
441	0	}
442	0	ctx->db_meth = &nconf_method;
443	0	ctx->db = conf;
444	0	}
445
446		void X509V3_set_ctx(X509V3_CTX ctx, X509 issuer, X509 subj, X509_REQ req,
447		X509_CRL *crl, int flags)
448	0	{
449	0	if (ctx == NULL) {
450	0	ERR_raise(ERR_LIB_X509V3, ERR_R_PASSED_NULL_PARAMETER);
451	0	return;
452	0	}
453	0	ctx->flags = flags;
454	0	ctx->issuer_cert = issuer;
455	0	ctx->subject_cert = subj;
456	0	ctx->subject_req = req;
457	0	ctx->crl = crl;
458	0	ctx->db_meth = NULL;
459	0	ctx->db = NULL;
460	0	ctx->issuer_pkey = NULL;
461	0	}
462
463		/* For API backward compatibility, this is separate from X509V3_set_ctx() */
464		int X509V3_set_issuer_pkey(X509V3_CTX ctx, EVP_PKEY pkey)
465	0	{
466	0	if (ctx == NULL) {
467	0	ERR_raise(ERR_LIB_X509V3, ERR_R_PASSED_NULL_PARAMETER);
468	0	return 0;
469	0	}
470	0	if (ctx->subject_cert == NULL && pkey != NULL) {
471	0	ERR_raise(ERR_LIB_X509V3, ERR_R_PASSED_INVALID_ARGUMENT);
472	0	return 0;
473	0	}
474	0	ctx->issuer_pkey = pkey;
475	0	return 1;
476	0	}
477
478		/* Old conf compatibility functions */
479
480		X509_EXTENSION X509V3_EXT_conf(LHASH_OF(CONF_VALUE) conf, X509V3_CTX *ctx,
481		const char name, const char value)
482	0	{
483	0	CONF *ctmp;
484	0	X509_EXTENSION *ret;
485
486	0	if ((ctmp = NCONF_new(NULL)) == NULL)
487	0	return NULL;
488	0	CONF_set_nconf(ctmp, conf);
489	0	ret = X509V3_EXT_nconf(ctmp, ctx, name, value);
490	0	CONF_set_nconf(ctmp, NULL);
491	0	NCONF_free(ctmp);
492	0	return ret;
493	0	}
494
495		X509_EXTENSION X509V3_EXT_conf_nid(LHASH_OF(CONF_VALUE) conf,
496		X509V3_CTX ctx, int ext_nid, const char value)
497	0	{
498	0	CONF *ctmp;
499	0	X509_EXTENSION *ret;
500
501	0	if ((ctmp = NCONF_new(NULL)) == NULL)
502	0	return NULL;
503	0	CONF_set_nconf(ctmp, conf);
504	0	ret = X509V3_EXT_nconf_nid(ctmp, ctx, ext_nid, value);
505	0	CONF_set_nconf(ctmp, NULL);
506	0	NCONF_free(ctmp);
507	0	return ret;
508	0	}
509
510		static char conf_lhash_get_string(void db, const char section, const char value)
511	0	{
512	0	return CONF_get_string(db, section, value);
513	0	}
514
515		static STACK_OF(CONF_VALUE) conf_lhash_get_section(void db, const char *section)
516	0	{
517	0	return CONF_get_section(db, section);
518	0	}
519
520		static X509V3_CONF_METHOD conf_lhash_method = {
521		conf_lhash_get_string,
522		conf_lhash_get_section,
523		NULL,
524		NULL
525		};
526
527		void X509V3_set_conf_lhash(X509V3_CTX ctx, LHASH_OF(CONF_VALUE) lhash)
528	0	{
529	0	if (ctx == NULL) {
530	0	ERR_raise(ERR_LIB_X509V3, ERR_R_PASSED_NULL_PARAMETER);
531	0	return;
532	0	}
533	0	ctx->db_meth = &conf_lhash_method;
534	0	ctx->db = lhash;
535	0	}
536
537		int X509V3_EXT_add_conf(LHASH_OF(CONF_VALUE) conf, X509V3_CTX ctx,
538		const char section, X509 cert)
539	0	{
540	0	CONF *ctmp;
541	0	int ret;
542
543	0	if ((ctmp = NCONF_new(NULL)) == NULL)
544	0	return 0;
545	0	CONF_set_nconf(ctmp, conf);
546	0	ret = X509V3_EXT_add_nconf(ctmp, ctx, section, cert);
547	0	CONF_set_nconf(ctmp, NULL);
548	0	NCONF_free(ctmp);
549	0	return ret;
550	0	}
551
552		/* Same as above but for a CRL */
553
554		int X509V3_EXT_CRL_add_conf(LHASH_OF(CONF_VALUE) conf, X509V3_CTX ctx,
555		const char section, X509_CRL crl)
556	0	{
557	0	CONF *ctmp;
558	0	int ret;
559
560	0	if ((ctmp = NCONF_new(NULL)) == NULL)
561	0	return 0;
562	0	CONF_set_nconf(ctmp, conf);
563	0	ret = X509V3_EXT_CRL_add_nconf(ctmp, ctx, section, crl);
564	0	CONF_set_nconf(ctmp, NULL);
565	0	NCONF_free(ctmp);
566	0	return ret;
567	0	}
568
569		/* Add extensions to certificate request */
570
571		int X509V3_EXT_REQ_add_conf(LHASH_OF(CONF_VALUE) conf, X509V3_CTX ctx,
572		const char section, X509_REQ req)
573	0	{
574	0	CONF *ctmp;
575	0	int ret;
576
577	0	if ((ctmp = NCONF_new(NULL)) == NULL)
578	0	return 0;
579	0	CONF_set_nconf(ctmp, conf);
580	0	ret = X509V3_EXT_REQ_add_nconf(ctmp, ctx, section, req);
581	0	CONF_set_nconf(ctmp, NULL);
582	0	NCONF_free(ctmp);
583	0	return ret;
584	0	}