/src/openssl111/crypto/x509v3/v3_conf.c

Source (jump to first uncovered line)
/*
 * Copyright 1999-2018 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (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);
/* CONF *conf:  Config file    */
/* char *name:  Name    */
/* char *value:  Value    */
X509_EXTENSION *X509V3_EXT_nconf(CONF *conf, X509V3_CTX *ctx, 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(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,
                                     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(conf, ctx, 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);
}

/* LHASH *conf:  Config file    */
/* char *value:  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);
}

Coverage Report

Created: 2023-09-25 06:41

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 1999-2018 The OpenSSL Project Authors. All Rights Reserved.
3		*
4		* Licensed under the OpenSSL license (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		/* CONF conf: Config file /
34		/* char name: Name /
35		/* char value: Value /
36		X509_EXTENSION X509V3_EXT_nconf(CONF conf, X509V3_CTX ctx, const char name,
37		const char *value)
38	0	{
39	0	int crit;
40	0	int ext_type;
41	0	X509_EXTENSION *ret;
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	X509V3err(X509V3_F_X509V3_EXT_NCONF, X509V3_R_ERROR_IN_EXTENSION);
48	0	ERR_add_error_data(4, "name=", name, ", value=", value);
49	0	}
50	0	return ret;
51	0	}
52
53		/* CONF conf: Config file /
54		/* char value: Value /
55		X509_EXTENSION X509V3_EXT_nconf_nid(CONF conf, X509V3_CTX *ctx, int ext_nid,
56		const char *value)
57	0	{
58	0	int crit;
59	0	int ext_type;
60	0	crit = v3_check_critical(&value);
61	0	if ((ext_type = v3_check_generic(&value)))
62	0	return v3_generic_extension(OBJ_nid2sn(ext_nid),
63	0	value, crit, ext_type, ctx);
64	0	return do_ext_nconf(conf, ctx, ext_nid, crit, value);
65	0	}
66
67		/* CONF conf: Config file /
68		/* char value: Value /
69		static X509_EXTENSION do_ext_nconf(CONF conf, X509V3_CTX *ctx, int ext_nid,
70		int crit, const char *value)
71	0	{
72	0	const X509V3_EXT_METHOD *method;
73	0	X509_EXTENSION *ext;
74	0	STACK_OF(CONF_VALUE) *nval;
75	0	void *ext_struc;
76
77	0	if (ext_nid == NID_undef) {
78	0	X509V3err(X509V3_F_DO_EXT_NCONF, X509V3_R_UNKNOWN_EXTENSION_NAME);
79	0	return NULL;
80	0	}
81	0	if ((method = X509V3_EXT_get_nid(ext_nid)) == NULL) {
82	0	X509V3err(X509V3_F_DO_EXT_NCONF, X509V3_R_UNKNOWN_EXTENSION);
83	0	return NULL;
84	0	}
85		/* Now get internal extension representation based on type */
86	0	if (method->v2i) {
87	0	if (*value == '@')
88	0	nval = NCONF_get_section(conf, value + 1);
89	0	else
90	0	nval = X509V3_parse_list(value);
91	0	if (nval == NULL \|\| sk_CONF_VALUE_num(nval) <= 0) {
92	0	X509V3err(X509V3_F_DO_EXT_NCONF,
93	0	X509V3_R_INVALID_EXTENSION_STRING);
94	0	ERR_add_error_data(4, "name=", OBJ_nid2sn(ext_nid), ",section=",
95	0	value);
96	0	if (*value != '@')
97	0	sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);
98	0	return NULL;
99	0	}
100	0	ext_struc = method->v2i(method, ctx, nval);
101	0	if (*value != '@')
102	0	sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);
103	0	if (!ext_struc)
104	0	return NULL;
105	0	} else if (method->s2i) {
106	0	if ((ext_struc = method->s2i(method, ctx, value)) == NULL)
107	0	return NULL;
108	0	} else if (method->r2i) {
109	0	if (!ctx->db \|\| !ctx->db_meth) {
110	0	X509V3err(X509V3_F_DO_EXT_NCONF, X509V3_R_NO_CONFIG_DATABASE);
111	0	return NULL;
112	0	}
113	0	if ((ext_struc = method->r2i(method, ctx, value)) == NULL)
114	0	return NULL;
115	0	} else {
116	0	X509V3err(X509V3_F_DO_EXT_NCONF,
117	0	X509V3_R_EXTENSION_SETTING_NOT_SUPPORTED);
118	0	ERR_add_error_data(2, "name=", OBJ_nid2sn(ext_nid));
119	0	return NULL;
120	0	}
121
122	0	ext = do_ext_i2d(method, ext_nid, crit, ext_struc);
123	0	if (method->it)
124	0	ASN1_item_free(ext_struc, ASN1_ITEM_ptr(method->it));
125	0	else
126	0	method->ext_free(ext_struc);
127	0	return ext;
128
129	0	}
130
131		static X509_EXTENSION do_ext_i2d(const X509V3_EXT_METHOD method,
132		int ext_nid, int crit, void *ext_struc)
133	0	{
134	0	unsigned char *ext_der = NULL;
135	0	int ext_len;
136	0	ASN1_OCTET_STRING *ext_oct = NULL;
137	0	X509_EXTENSION *ext;
138		/* Convert internal representation to DER */
139	0	if (method->it) {
140	0	ext_der = NULL;
141	0	ext_len =
142	0	ASN1_item_i2d(ext_struc, &ext_der, ASN1_ITEM_ptr(method->it));
143	0	if (ext_len < 0)
144	0	goto merr;
145	0	} else {
146	0	unsigned char *p;
147
148	0	ext_len = method->i2d(ext_struc, NULL);
149	0	if ((ext_der = OPENSSL_malloc(ext_len)) == NULL)
150	0	goto merr;
151	0	p = ext_der;
152	0	method->i2d(ext_struc, &p);
153	0	}
154	0	if ((ext_oct = ASN1_OCTET_STRING_new()) == NULL)
155	0	goto merr;
156	0	ext_oct->data = ext_der;
157	0	ext_der = NULL;
158	0	ext_oct->length = ext_len;
159
160	0	ext = X509_EXTENSION_create_by_NID(NULL, ext_nid, crit, ext_oct);
161	0	if (!ext)
162	0	goto merr;
163	0	ASN1_OCTET_STRING_free(ext_oct);
164
165	0	return ext;
166
167	0	merr:
168	0	X509V3err(X509V3_F_DO_EXT_I2D, ERR_R_MALLOC_FAILURE);
169	0	OPENSSL_free(ext_der);
170	0	ASN1_OCTET_STRING_free(ext_oct);
171	0	return NULL;
172
173	0	}
174
175		/* Given an internal structure, nid and critical flag create an extension */
176
177		X509_EXTENSION X509V3_EXT_i2d(int ext_nid, int crit, void ext_struc)
178	0	{
179	0	const X509V3_EXT_METHOD *method;
180
181	0	if ((method = X509V3_EXT_get_nid(ext_nid)) == NULL) {
182	0	X509V3err(X509V3_F_X509V3_EXT_I2D, X509V3_R_UNKNOWN_EXTENSION);
183	0	return NULL;
184	0	}
185	0	return do_ext_i2d(method, ext_nid, crit, ext_struc);
186	0	}
187
188		/* Check the extension string for critical flag */
189		static int v3_check_critical(const char **value)
190	0	{
191	0	const char p = value;
192	0	if ((strlen(p) < 9) \|\| strncmp(p, "critical,", 9))
193	0	return 0;
194	0	p += 9;
195	0	while (ossl_isspace(*p))
196	0	p++;
197	0	*value = p;
198	0	return 1;
199	0	}
200
201		/* Check extension string for generic extension and return the type */
202		static int v3_check_generic(const char **value)
203	0	{
204	0	int gen_type = 0;
205	0	const char p = value;
206	0	if ((strlen(p) >= 4) && strncmp(p, "DER:", 4) == 0) {
207	0	p += 4;
208	0	gen_type = 1;
209	0	} else if ((strlen(p) >= 5) && strncmp(p, "ASN1:", 5) == 0) {
210	0	p += 5;
211	0	gen_type = 2;
212	0	} else
213	0	return 0;
214
215	0	while (ossl_isspace(*p))
216	0	p++;
217	0	*value = p;
218	0	return gen_type;
219	0	}
220
221		/* Create a generic extension: for now just handle DER type */
222		static X509_EXTENSION v3_generic_extension(const char ext, const char *value,
223		int crit, int gen_type,
224		X509V3_CTX *ctx)
225	0	{
226	0	unsigned char *ext_der = NULL;
227	0	long ext_len = 0;
228	0	ASN1_OBJECT *obj = NULL;
229	0	ASN1_OCTET_STRING *oct = NULL;
230	0	X509_EXTENSION *extension = NULL;
231
232	0	if ((obj = OBJ_txt2obj(ext, 0)) == NULL) {
233	0	X509V3err(X509V3_F_V3_GENERIC_EXTENSION,
234	0	X509V3_R_EXTENSION_NAME_ERROR);
235	0	ERR_add_error_data(2, "name=", ext);
236	0	goto err;
237	0	}
238
239	0	if (gen_type == 1)
240	0	ext_der = OPENSSL_hexstr2buf(value, &ext_len);
241	0	else if (gen_type == 2)
242	0	ext_der = generic_asn1(value, ctx, &ext_len);
243
244	0	if (ext_der == NULL) {
245	0	X509V3err(X509V3_F_V3_GENERIC_EXTENSION,
246	0	X509V3_R_EXTENSION_VALUE_ERROR);
247	0	ERR_add_error_data(2, "value=", value);
248	0	goto err;
249	0	}
250
251	0	if ((oct = ASN1_OCTET_STRING_new()) == NULL) {
252	0	X509V3err(X509V3_F_V3_GENERIC_EXTENSION, ERR_R_MALLOC_FAILURE);
253	0	goto err;
254	0	}
255
256	0	oct->data = ext_der;
257	0	oct->length = ext_len;
258	0	ext_der = NULL;
259
260	0	extension = X509_EXTENSION_create_by_OBJ(NULL, obj, crit, oct);
261
262	0	err:
263	0	ASN1_OBJECT_free(obj);
264	0	ASN1_OCTET_STRING_free(oct);
265	0	OPENSSL_free(ext_der);
266	0	return extension;
267
268	0	}
269
270		static unsigned char generic_asn1(const char value, X509V3_CTX *ctx,
271		long *ext_len)
272	0	{
273	0	ASN1_TYPE *typ;
274	0	unsigned char *ext_der = NULL;
275	0	typ = ASN1_generate_v3(value, ctx);
276	0	if (typ == NULL)
277	0	return NULL;
278	0	*ext_len = i2d_ASN1_TYPE(typ, &ext_der);
279	0	ASN1_TYPE_free(typ);
280	0	return ext_der;
281	0	}
282
283		static void delete_ext(STACK_OF(X509_EXTENSION) sk, X509_EXTENSION dext)
284	0	{
285	0	int idx;
286	0	ASN1_OBJECT *obj;
287	0	obj = X509_EXTENSION_get_object(dext);
288	0	while ((idx = X509v3_get_ext_by_OBJ(sk, obj, -1)) >= 0) {
289	0	X509_EXTENSION *tmpext = X509v3_get_ext(sk, idx);
290	0	X509v3_delete_ext(sk, idx);
291	0	X509_EXTENSION_free(tmpext);
292	0	}
293	0	}
294
295		/*
296		* This is the main function: add a bunch of extensions based on a config
297		* file section to an extension STACK.
298		*/
299
300		int X509V3_EXT_add_nconf_sk(CONF conf, X509V3_CTX ctx, const char *section,
301		STACK_OF(X509_EXTENSION) **sk)
302	0	{
303	0	X509_EXTENSION *ext;
304	0	STACK_OF(CONF_VALUE) *nval;
305	0	CONF_VALUE *val;
306	0	int i;
307
308	0	if ((nval = NCONF_get_section(conf, section)) == NULL)
309	0	return 0;
310	0	for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
311	0	val = sk_CONF_VALUE_value(nval, i);
312	0	if ((ext = X509V3_EXT_nconf(conf, ctx, val->name, val->value)) == NULL)
313	0	return 0;
314	0	if (ctx->flags == X509V3_CTX_REPLACE)
315	0	delete_ext(*sk, ext);
316	0	if (sk != NULL) {
317	0	if (X509v3_add_ext(sk, ext, -1) == NULL) {
318	0	X509_EXTENSION_free(ext);
319	0	return 0;
320	0	}
321	0	}
322	0	X509_EXTENSION_free(ext);
323	0	}
324	0	return 1;
325	0	}
326
327		/*
328		* Convenience functions to add extensions to a certificate, CRL and request
329		*/
330
331		int X509V3_EXT_add_nconf(CONF conf, X509V3_CTX ctx, const char *section,
332		X509 *cert)
333	0	{
334	0	STACK_OF(X509_EXTENSION) **sk = NULL;
335	0	if (cert)
336	0	sk = &cert->cert_info.extensions;
337	0	return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
338	0	}
339
340		/* Same as above but for a CRL */
341
342		int X509V3_EXT_CRL_add_nconf(CONF conf, X509V3_CTX ctx, const char *section,
343		X509_CRL *crl)
344	0	{
345	0	STACK_OF(X509_EXTENSION) **sk = NULL;
346	0	if (crl)
347	0	sk = &crl->crl.extensions;
348	0	return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
349	0	}
350
351		/* Add extensions to certificate request */
352
353		int X509V3_EXT_REQ_add_nconf(CONF conf, X509V3_CTX ctx, const char *section,
354		X509_REQ *req)
355	0	{
356	0	STACK_OF(X509_EXTENSION) extlist = NULL, *sk = NULL;
357	0	int i;
358	0	if (req)
359	0	sk = &extlist;
360	0	i = X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
361	0	if (!i \|\| !sk)
362	0	return i;
363	0	i = X509_REQ_add_extensions(req, extlist);
364	0	sk_X509_EXTENSION_pop_free(extlist, X509_EXTENSION_free);
365	0	return i;
366	0	}
367
368		/* Config database functions */
369
370		char X509V3_get_string(X509V3_CTX ctx, const char name, const char section)
371	0	{
372	0	if (!ctx->db \|\| !ctx->db_meth \|\| !ctx->db_meth->get_string) {
373	0	X509V3err(X509V3_F_X509V3_GET_STRING, X509V3_R_OPERATION_NOT_DEFINED);
374	0	return NULL;
375	0	}
376	0	if (ctx->db_meth->get_string)
377	0	return ctx->db_meth->get_string(ctx->db, name, section);
378	0	return NULL;
379	0	}
380
381		STACK_OF(CONF_VALUE) X509V3_get_section(X509V3_CTX ctx, const char *section)
382	0	{
383	0	if (!ctx->db \|\| !ctx->db_meth \|\| !ctx->db_meth->get_section) {
384	0	X509V3err(X509V3_F_X509V3_GET_SECTION,
385	0	X509V3_R_OPERATION_NOT_DEFINED);
386	0	return NULL;
387	0	}
388	0	if (ctx->db_meth->get_section)
389	0	return ctx->db_meth->get_section(ctx->db, section);
390	0	return NULL;
391	0	}
392
393		void X509V3_string_free(X509V3_CTX ctx, char str)
394	0	{
395	0	if (!str)
396	0	return;
397	0	if (ctx->db_meth->free_string)
398	0	ctx->db_meth->free_string(ctx->db, str);
399	0	}
400
401		void X509V3_section_free(X509V3_CTX ctx, STACK_OF(CONF_VALUE) section)
402	0	{
403	0	if (!section)
404	0	return;
405	0	if (ctx->db_meth->free_section)
406	0	ctx->db_meth->free_section(ctx->db, section);
407	0	}
408
409		static char nconf_get_string(void db, const char section, const char value)
410	0	{
411	0	return NCONF_get_string(db, section, value);
412	0	}
413
414		static STACK_OF(CONF_VALUE) nconf_get_section(void db, const char *section)
415	0	{
416	0	return NCONF_get_section(db, section);
417	0	}
418
419		static X509V3_CONF_METHOD nconf_method = {
420		nconf_get_string,
421		nconf_get_section,
422		NULL,
423		NULL
424		};
425
426		void X509V3_set_nconf(X509V3_CTX ctx, CONF conf)
427	0	{
428	0	ctx->db_meth = &nconf_method;
429	0	ctx->db = conf;
430	0	}
431
432		void X509V3_set_ctx(X509V3_CTX ctx, X509 issuer, X509 subj, X509_REQ req,
433		X509_CRL *crl, int flags)
434	0	{
435	0	ctx->issuer_cert = issuer;
436	0	ctx->subject_cert = subj;
437	0	ctx->crl = crl;
438	0	ctx->subject_req = req;
439	0	ctx->flags = flags;
440	0	}
441
442		/* Old conf compatibility functions */
443
444		X509_EXTENSION X509V3_EXT_conf(LHASH_OF(CONF_VALUE) conf, X509V3_CTX *ctx,
445		const char name, const char value)
446	0	{
447	0	CONF ctmp;
448	0	CONF_set_nconf(&ctmp, conf);
449	0	return X509V3_EXT_nconf(&ctmp, ctx, name, value);
450	0	}
451
452		/* LHASH conf: Config file /
453		/* char value: Value /
454		X509_EXTENSION X509V3_EXT_conf_nid(LHASH_OF(CONF_VALUE) conf,
455		X509V3_CTX ctx, int ext_nid, const char value)
456	0	{
457	0	CONF ctmp;
458	0	CONF_set_nconf(&ctmp, conf);
459	0	return X509V3_EXT_nconf_nid(&ctmp, ctx, ext_nid, value);
460	0	}
461
462		static char conf_lhash_get_string(void db, const char section, const char value)
463	0	{
464	0	return CONF_get_string(db, section, value);
465	0	}
466
467		static STACK_OF(CONF_VALUE) conf_lhash_get_section(void db, const char *section)
468	0	{
469	0	return CONF_get_section(db, section);
470	0	}
471
472		static X509V3_CONF_METHOD conf_lhash_method = {
473		conf_lhash_get_string,
474		conf_lhash_get_section,
475		NULL,
476		NULL
477		};
478
479		void X509V3_set_conf_lhash(X509V3_CTX ctx, LHASH_OF(CONF_VALUE) lhash)
480	0	{
481	0	ctx->db_meth = &conf_lhash_method;
482	0	ctx->db = lhash;
483	0	}
484
485		int X509V3_EXT_add_conf(LHASH_OF(CONF_VALUE) conf, X509V3_CTX ctx,
486		const char section, X509 cert)
487	0	{
488	0	CONF ctmp;
489	0	CONF_set_nconf(&ctmp, conf);
490	0	return X509V3_EXT_add_nconf(&ctmp, ctx, section, cert);
491	0	}
492
493		/* Same as above but for a CRL */
494
495		int X509V3_EXT_CRL_add_conf(LHASH_OF(CONF_VALUE) conf, X509V3_CTX ctx,
496		const char section, X509_CRL crl)
497	0	{
498	0	CONF ctmp;
499	0	CONF_set_nconf(&ctmp, conf);
500	0	return X509V3_EXT_CRL_add_nconf(&ctmp, ctx, section, crl);
501	0	}
502
503		/* Add extensions to certificate request */
504
505		int X509V3_EXT_REQ_add_conf(LHASH_OF(CONF_VALUE) conf, X509V3_CTX ctx,
506		const char section, X509_REQ req)
507	0	{
508	0	CONF ctmp;
509	0	CONF_set_nconf(&ctmp, conf);
510	0	return X509V3_EXT_REQ_add_nconf(&ctmp, ctx, section, req);
511	0	}