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/*
* 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
*/
/* X509 v3 extension utilities */
#include <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/conf.h>
#include <openssl/x509v3.h>
DEFINE_STACK_OF(CONF_VALUE)
DEFINE_STACK_OF(X509_EXTENSION)
/* Extension printing routines */
static int unknown_ext_print(BIO *out, const unsigned char *ext, int extlen,
unsigned long flag, int indent, int supported);
/* Print out a name+value stack */
void X509V3_EXT_val_prn(BIO *out, STACK_OF(CONF_VALUE) *val, int indent,
int ml)
{
int i;
CONF_VALUE *nval;
if (!val)
return;
if (!ml || !sk_CONF_VALUE_num(val)) {
BIO_printf(out, "%*s", indent, "");
if (!sk_CONF_VALUE_num(val))
BIO_puts(out, "<EMPTY>\n");
}
for (i = 0; i < sk_CONF_VALUE_num(val); i++) {
if (ml) {
if (i > 0)
BIO_printf(out, "\n");
BIO_printf(out, "%*s", indent, "");
}
else if (i > 0)
BIO_printf(out, ", ");
nval = sk_CONF_VALUE_value(val, i);
if (!nval->name)
BIO_puts(out, nval->value);
else if (!nval->value)
BIO_puts(out, nval->name);
#ifndef CHARSET_EBCDIC
else
BIO_printf(out, "%s:%s", nval->name, nval->value);
#else
else {
int len;
char *tmp;
len = strlen(nval->value) + 1;
tmp = OPENSSL_malloc(len);
if (tmp != NULL) {
ascii2ebcdic(tmp, nval->value, len);
BIO_printf(out, "%s:%s", nval->name, tmp);
OPENSSL_free(tmp);
}
}
#endif
}
}
/* Main routine: print out a general extension */
int X509V3_EXT_print(BIO *out, X509_EXTENSION *ext, unsigned long flag,
int indent)
{
void *ext_str = NULL;
char *value = NULL;
ASN1_OCTET_STRING *extoct;
const unsigned char *p;
int extlen;
const X509V3_EXT_METHOD *method;
STACK_OF(CONF_VALUE) *nval = NULL;
int ok = 1;
extoct = X509_EXTENSION_get_data(ext);
p = ASN1_STRING_get0_data(extoct);
extlen = ASN1_STRING_length(extoct);
if ((method = X509V3_EXT_get(ext)) == NULL)
return unknown_ext_print(out, p, extlen, flag, indent, 0);
if (method->it)
ext_str = ASN1_item_d2i(NULL, &p, extlen, ASN1_ITEM_ptr(method->it));
else
ext_str = method->d2i(NULL, &p, extlen);
if (!ext_str)
return unknown_ext_print(out, p, extlen, flag, indent, 1);
if (method->i2s) {
if ((value = method->i2s(method, ext_str)) == NULL) {
ok = 0;
goto err;
}
#ifndef CHARSET_EBCDIC
BIO_printf(out, "%*s%s", indent, "", value);
#else
{
int len;
char *tmp;
len = strlen(value) + 1;
tmp = OPENSSL_malloc(len);
if (tmp != NULL) {
ascii2ebcdic(tmp, value, len);
BIO_printf(out, "%*s%s", indent, "", tmp);
OPENSSL_free(tmp);
}
}
#endif
} else if (method->i2v) {
if ((nval = method->i2v(method, ext_str, NULL)) == NULL) {
ok = 0;
goto err;
}
X509V3_EXT_val_prn(out, nval, indent,
method->ext_flags & X509V3_EXT_MULTILINE);
} else if (method->i2r) {
if (!method->i2r(method, ext_str, out, indent))
ok = 0;
} else
ok = 0;
err:
sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);
OPENSSL_free(value);
if (method->it)
ASN1_item_free(ext_str, ASN1_ITEM_ptr(method->it));
else
method->ext_free(ext_str);
return ok;
}
int X509V3_extensions_print(BIO *bp, const char *title,
const STACK_OF(X509_EXTENSION) *exts,
unsigned long flag, int indent)
{
int i, j;
if (sk_X509_EXTENSION_num(exts) <= 0)
return 1;
if (title) {
BIO_printf(bp, "%*s%s:\n", indent, "", title);
indent += 4;
}
for (i = 0; i < sk_X509_EXTENSION_num(exts); i++) {
ASN1_OBJECT *obj;
X509_EXTENSION *ex;
ex = sk_X509_EXTENSION_value(exts, i);
obj = X509_EXTENSION_get_object(ex);
if ((flag & X509_FLAG_EXTENSIONS_ONLY_KID) != 0
&& OBJ_obj2nid(obj) != NID_subject_key_identifier
&& OBJ_obj2nid(obj) != NID_authority_key_identifier)
continue;
if (indent && BIO_printf(bp, "%*s", indent, "") <= 0)
return 0;
i2a_ASN1_OBJECT(bp, obj);
j = X509_EXTENSION_get_critical(ex);
if (BIO_printf(bp, ": %s\n", j ? "critical" : "") <= 0)
return 0;
if (!X509V3_EXT_print(bp, ex, flag, indent + 4)) {
BIO_printf(bp, "%*s", indent + 4, "");
ASN1_STRING_print(bp, X509_EXTENSION_get_data(ex));
}
if (BIO_write(bp, "\n", 1) <= 0)
return 0;
}
return 1;
}
static int unknown_ext_print(BIO *out, const unsigned char *ext, int extlen,
unsigned long flag, int indent, int supported)
{
switch (flag & X509V3_EXT_UNKNOWN_MASK) {
case X509V3_EXT_DEFAULT:
return 0;
case X509V3_EXT_ERROR_UNKNOWN:
if (supported)
BIO_printf(out, "%*s<Parse Error>", indent, "");
else
BIO_printf(out, "%*s<Not Supported>", indent, "");
return 1;
case X509V3_EXT_PARSE_UNKNOWN:
return ASN1_parse_dump(out, ext, extlen, indent, -1);
case X509V3_EXT_DUMP_UNKNOWN:
return BIO_dump_indent(out, (const char *)ext, extlen, indent);
default:
return 1;
}
}
#ifndef OPENSSL_NO_STDIO
int X509V3_EXT_print_fp(FILE *fp, X509_EXTENSION *ext, int flag, int indent)
{
BIO *bio_tmp;
int ret;
if ((bio_tmp = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL)
return 0;
ret = X509V3_EXT_print(bio_tmp, ext, flag, indent);
BIO_free(bio_tmp);
return ret;
}
#endif
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