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940d664def
source-engine/thirdparty/openssl/crypto/x509v3/v3_utl.c
JusicP 940d664def Add thirdparty libs
2020-10-22 20:43:01 +03:00

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/* v3_utl.c */
/*
* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
* project.
*/
/* ====================================================================
* Copyright (c) 1999-2003 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).
*
*/
/* X509 v3 extension utilities */
#include <stdio.h>
#include <ctype.h>
#include "cryptlib.h"
#include <openssl/conf.h>
#include <openssl/x509v3.h>
#include <openssl/bn.h>
static char *strip_spaces(char *name);
static int sk_strcmp(const char *const *a, const char *const *b);
static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name,
GENERAL_NAMES *gens);
static void str_free(OPENSSL_STRING str);
static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, ASN1_IA5STRING *email);
static int ipv4_from_asc(unsigned char *v4, const char *in);
static int ipv6_from_asc(unsigned char *v6, const char *in);
static int ipv6_cb(const char *elem, int len, void *usr);
static int ipv6_hex(unsigned char *out, const char *in, int inlen);
/* Add a CONF_VALUE name value pair to stack */
int X509V3_add_value(const char *name, const char *value,
STACK_OF(CONF_VALUE) **extlist)
{
CONF_VALUE *vtmp = NULL;
char *tname = NULL, *tvalue = NULL;
if (name && !(tname = BUF_strdup(name)))
goto err;
if (value && !(tvalue = BUF_strdup(value)))
goto err;
if (!(vtmp = (CONF_VALUE *)OPENSSL_malloc(sizeof(CONF_VALUE))))
goto err;
if (!*extlist && !(*extlist = sk_CONF_VALUE_new_null()))
goto err;
vtmp->section = NULL;
vtmp->name = tname;
vtmp->value = tvalue;
if (!sk_CONF_VALUE_push(*extlist, vtmp))
goto err;
return 1;
err:
X509V3err(X509V3_F_X509V3_ADD_VALUE, ERR_R_MALLOC_FAILURE);
if (vtmp)
OPENSSL_free(vtmp);
if (tname)
OPENSSL_free(tname);
if (tvalue)
OPENSSL_free(tvalue);
return 0;
}
int X509V3_add_value_uchar(const char *name, const unsigned char *value,
STACK_OF(CONF_VALUE) **extlist)
{
return X509V3_add_value(name, (const char *)value, extlist);
}
/* Free function for STACK_OF(CONF_VALUE) */
void X509V3_conf_free(CONF_VALUE *conf)
{
if (!conf)
return;
if (conf->name)
OPENSSL_free(conf->name);
if (conf->value)
OPENSSL_free(conf->value);
if (conf->section)
OPENSSL_free(conf->section);
OPENSSL_free(conf);
}
int X509V3_add_value_bool(const char *name, int asn1_bool,
STACK_OF(CONF_VALUE) **extlist)
{
if (asn1_bool)
return X509V3_add_value(name, "TRUE", extlist);
return X509V3_add_value(name, "FALSE", extlist);
}
int X509V3_add_value_bool_nf(char *name, int asn1_bool,
STACK_OF(CONF_VALUE) **extlist)
{
if (asn1_bool)
return X509V3_add_value(name, "TRUE", extlist);
return 1;
}
char *i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *method, ASN1_ENUMERATED *a)
{
BIGNUM *bntmp = NULL;
char *strtmp = NULL;
if (!a)
return NULL;
if (!(bntmp = ASN1_ENUMERATED_to_BN(a, NULL)) ||
!(strtmp = BN_bn2dec(bntmp)))
X509V3err(X509V3_F_I2S_ASN1_ENUMERATED, ERR_R_MALLOC_FAILURE);
BN_free(bntmp);
return strtmp;
}
char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, ASN1_INTEGER *a)
{
BIGNUM *bntmp = NULL;
char *strtmp = NULL;
if (!a)
return NULL;
if (!(bntmp = ASN1_INTEGER_to_BN(a, NULL)) ||
!(strtmp = BN_bn2dec(bntmp)))
X509V3err(X509V3_F_I2S_ASN1_INTEGER, ERR_R_MALLOC_FAILURE);
BN_free(bntmp);
return strtmp;
}
ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, char *value)
{
BIGNUM *bn = NULL;
ASN1_INTEGER *aint;
int isneg, ishex;
int ret;
if (!value) {
X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_INVALID_NULL_VALUE);
return 0;
}
bn = BN_new();
if (value[0] == '-') {
value++;
isneg = 1;
} else
isneg = 0;
if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) {
value += 2;
ishex = 1;
} else
ishex = 0;
if (ishex)
ret = BN_hex2bn(&bn, value);
else
ret = BN_dec2bn(&bn, value);
if (!ret || value[ret]) {
BN_free(bn);
X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_BN_DEC2BN_ERROR);
return 0;
}
if (isneg && BN_is_zero(bn))
isneg = 0;
aint = BN_to_ASN1_INTEGER(bn, NULL);
BN_free(bn);
if (!aint) {
X509V3err(X509V3_F_S2I_ASN1_INTEGER,
X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
return 0;
}
if (isneg)
aint->type |= V_ASN1_NEG;
return aint;
}
int X509V3_add_value_int(const char *name, ASN1_INTEGER *aint,
STACK_OF(CONF_VALUE) **extlist)
{
char *strtmp;
int ret;
if (!aint)
return 1;
if (!(strtmp = i2s_ASN1_INTEGER(NULL, aint)))
return 0;
ret = X509V3_add_value(name, strtmp, extlist);
OPENSSL_free(strtmp);
return ret;
}
int X509V3_get_value_bool(CONF_VALUE *value, int *asn1_bool)
{
char *btmp;
if (!(btmp = value->value))
goto err;
if (!strcmp(btmp, "TRUE") || !strcmp(btmp, "true")
|| !strcmp(btmp, "Y") || !strcmp(btmp, "y")
|| !strcmp(btmp, "YES") || !strcmp(btmp, "yes")) {
*asn1_bool = 0xff;
return 1;
} else if (!strcmp(btmp, "FALSE") || !strcmp(btmp, "false")
|| !strcmp(btmp, "N") || !strcmp(btmp, "n")
|| !strcmp(btmp, "NO") || !strcmp(btmp, "no")) {
*asn1_bool = 0;
return 1;
}
err:
X509V3err(X509V3_F_X509V3_GET_VALUE_BOOL,
X509V3_R_INVALID_BOOLEAN_STRING);
X509V3_conf_err(value);
return 0;
}
int X509V3_get_value_int(CONF_VALUE *value, ASN1_INTEGER **aint)
{
ASN1_INTEGER *itmp;
if (!(itmp = s2i_ASN1_INTEGER(NULL, value->value))) {
X509V3_conf_err(value);
return 0;
}
*aint = itmp;
return 1;
}
#define HDR_NAME 1
#define HDR_VALUE 2
/*
* #define DEBUG
*/
STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line)
{
char *p, *q, c;
char *ntmp, *vtmp;
STACK_OF(CONF_VALUE) *values = NULL;
char *linebuf;
int state;
/* We are going to modify the line so copy it first */
linebuf = BUF_strdup(line);
if (linebuf == NULL) {
X509V3err(X509V3_F_X509V3_PARSE_LIST, ERR_R_MALLOC_FAILURE);
goto err;
}
state = HDR_NAME;
ntmp = NULL;
/* Go through all characters */
for (p = linebuf, q = linebuf; (c = *p) && (c != '\r') && (c != '\n');
p++) {
switch (state) {
case HDR_NAME:
if (c == ':') {
state = HDR_VALUE;
*p = 0;
ntmp = strip_spaces(q);
if (!ntmp) {
X509V3err(X509V3_F_X509V3_PARSE_LIST,
X509V3_R_INVALID_NULL_NAME);
goto err;
}
q = p + 1;
} else if (c == ',') {
*p = 0;
ntmp = strip_spaces(q);
q = p + 1;
#if 0
printf("%s\n", ntmp);
#endif
if (!ntmp) {
X509V3err(X509V3_F_X509V3_PARSE_LIST,
X509V3_R_INVALID_NULL_NAME);
goto err;
}
X509V3_add_value(ntmp, NULL, &values);
}
break;
case HDR_VALUE:
if (c == ',') {
state = HDR_NAME;
*p = 0;
vtmp = strip_spaces(q);
#if 0
printf("%s\n", ntmp);
#endif
if (!vtmp) {
X509V3err(X509V3_F_X509V3_PARSE_LIST,
X509V3_R_INVALID_NULL_VALUE);
goto err;
}
X509V3_add_value(ntmp, vtmp, &values);
ntmp = NULL;
q = p + 1;
}
}
}
if (state == HDR_VALUE) {
vtmp = strip_spaces(q);
#if 0
printf("%s=%s\n", ntmp, vtmp);
#endif
if (!vtmp) {
X509V3err(X509V3_F_X509V3_PARSE_LIST,
X509V3_R_INVALID_NULL_VALUE);
goto err;
}
X509V3_add_value(ntmp, vtmp, &values);
} else {
ntmp = strip_spaces(q);
#if 0
printf("%s\n", ntmp);
#endif
if (!ntmp) {
X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
goto err;
}
X509V3_add_value(ntmp, NULL, &values);
}
OPENSSL_free(linebuf);
return values;
err:
OPENSSL_free(linebuf);
sk_CONF_VALUE_pop_free(values, X509V3_conf_free);
return NULL;
}
/* Delete leading and trailing spaces from a string */
static char *strip_spaces(char *name)
{
char *p, *q;
/* Skip over leading spaces */
p = name;
while (*p && isspace((unsigned char)*p))
p++;
if (!*p)
return NULL;
q = p + strlen(p) - 1;
while ((q != p) && isspace((unsigned char)*q))
q--;
if (p != q)
q[1] = 0;
if (!*p)
return NULL;
return p;
}
/* hex string utilities */
/*
* Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
* hex representation @@@ (Contents of buffer are always kept in ASCII, also
* on EBCDIC machines)
*/
char *hex_to_string(const unsigned char *buffer, long len)
{
char *tmp, *q;
const unsigned char *p;
int i;
const static char hexdig[] = "0123456789ABCDEF";
if (!buffer || !len)
return NULL;
if (!(tmp = OPENSSL_malloc(len * 3 + 1))) {
X509V3err(X509V3_F_HEX_TO_STRING, ERR_R_MALLOC_FAILURE);
return NULL;
}
q = tmp;
for (i = 0, p = buffer; i < len; i++, p++) {
*q++ = hexdig[(*p >> 4) & 0xf];
*q++ = hexdig[*p & 0xf];
*q++ = ':';
}
q[-1] = 0;
#ifdef CHARSET_EBCDIC
ebcdic2ascii(tmp, tmp, q - tmp - 1);
#endif
return tmp;
}
/*
* Give a string of hex digits convert to a buffer
*/
unsigned char *string_to_hex(const char *str, long *len)
{
unsigned char *hexbuf, *q;
unsigned char ch, cl, *p;
if (!str) {
X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_INVALID_NULL_ARGUMENT);
return NULL;
}
if (!(hexbuf = OPENSSL_malloc(strlen(str) >> 1)))
goto err;
for (p = (unsigned char *)str, q = hexbuf; *p;) {
ch = *p++;
#ifdef CHARSET_EBCDIC
ch = os_toebcdic[ch];
#endif
if (ch == ':')
continue;
cl = *p++;
#ifdef CHARSET_EBCDIC
cl = os_toebcdic[cl];
#endif
if (!cl) {
X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_ODD_NUMBER_OF_DIGITS);
OPENSSL_free(hexbuf);
return NULL;
}
if (isupper(ch))
ch = tolower(ch);
if (isupper(cl))
cl = tolower(cl);
if ((ch >= '0') && (ch <= '9'))
ch -= '0';
else if ((ch >= 'a') && (ch <= 'f'))
ch -= 'a' - 10;
else
goto badhex;
if ((cl >= '0') && (cl <= '9'))
cl -= '0';
else if ((cl >= 'a') && (cl <= 'f'))
cl -= 'a' - 10;
else
goto badhex;
*q++ = (ch << 4) | cl;
}
if (len)
*len = q - hexbuf;
return hexbuf;
err:
if (hexbuf)
OPENSSL_free(hexbuf);
X509V3err(X509V3_F_STRING_TO_HEX, ERR_R_MALLOC_FAILURE);
return NULL;
badhex:
OPENSSL_free(hexbuf);
X509V3err(X509V3_F_STRING_TO_HEX, X509V3_R_ILLEGAL_HEX_DIGIT);
return NULL;
}
/*
* V2I name comparison function: returns zero if 'name' matches cmp or cmp.*
*/
int name_cmp(const char *name, const char *cmp)
{
int len, ret;
char c;
len = strlen(cmp);
if ((ret = strncmp(name, cmp, len)))
return ret;
c = name[len];
if (!c || (c == '.'))
return 0;
return 1;
}
static int sk_strcmp(const char *const *a, const char *const *b)
{
return strcmp(*a, *b);
}
STACK_OF(OPENSSL_STRING) *X509_get1_email(X509 *x)
{
GENERAL_NAMES *gens;
STACK_OF(OPENSSL_STRING) *ret;
gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
ret = get_email(X509_get_subject_name(x), gens);
sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
return ret;
}
STACK_OF(OPENSSL_STRING) *X509_get1_ocsp(X509 *x)
{
AUTHORITY_INFO_ACCESS *info;
STACK_OF(OPENSSL_STRING) *ret = NULL;
int i;
info = X509_get_ext_d2i(x, NID_info_access, NULL, NULL);
if (!info)
return NULL;
for (i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++) {
ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i);
if (OBJ_obj2nid(ad->method) == NID_ad_OCSP) {
if (ad->location->type == GEN_URI) {
if (!append_ia5
(&ret, ad->location->d.uniformResourceIdentifier))
break;
}
}
}
AUTHORITY_INFO_ACCESS_free(info);
return ret;
}
STACK_OF(OPENSSL_STRING) *X509_REQ_get1_email(X509_REQ *x)
{
GENERAL_NAMES *gens;
STACK_OF(X509_EXTENSION) *exts;
STACK_OF(OPENSSL_STRING) *ret;
exts = X509_REQ_get_extensions(x);
gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
ret = get_email(X509_REQ_get_subject_name(x), gens);
sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
return ret;
}
static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name,
GENERAL_NAMES *gens)
{
STACK_OF(OPENSSL_STRING) *ret = NULL;
X509_NAME_ENTRY *ne;
ASN1_IA5STRING *email;
GENERAL_NAME *gen;
int i;
/* Now add any email address(es) to STACK */
i = -1;
/* First supplied X509_NAME */
while ((i = X509_NAME_get_index_by_NID(name,
NID_pkcs9_emailAddress, i)) >= 0) {
ne = X509_NAME_get_entry(name, i);
email = X509_NAME_ENTRY_get_data(ne);
if (!append_ia5(&ret, email))
return NULL;
}
for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
gen = sk_GENERAL_NAME_value(gens, i);
if (gen->type != GEN_EMAIL)
continue;
if (!append_ia5(&ret, gen->d.ia5))
return NULL;
}
return ret;
}
static void str_free(OPENSSL_STRING str)
{
OPENSSL_free(str);
}
static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, ASN1_IA5STRING *email)
{
char *emtmp;
/* First some sanity checks */
if (email->type != V_ASN1_IA5STRING)
return 1;
if (!email->data || !email->length)
return 1;
if (!*sk)
*sk = sk_OPENSSL_STRING_new(sk_strcmp);
if (!*sk)
return 0;
/* Don't add duplicates */
if (sk_OPENSSL_STRING_find(*sk, (char *)email->data) != -1)
return 1;
emtmp = BUF_strdup((char *)email->data);
if (!emtmp || !sk_OPENSSL_STRING_push(*sk, emtmp)) {
X509_email_free(*sk);
*sk = NULL;
return 0;
}
return 1;
}
void X509_email_free(STACK_OF(OPENSSL_STRING) *sk)
{
sk_OPENSSL_STRING_pop_free(sk, str_free);
}
/*
* Convert IP addresses both IPv4 and IPv6 into an OCTET STRING compatible
* with RFC3280.
*/
ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc)
{
unsigned char ipout[16];
ASN1_OCTET_STRING *ret;
int iplen;
/* If string contains a ':' assume IPv6 */
iplen = a2i_ipadd(ipout, ipasc);
if (!iplen)
return NULL;
ret = ASN1_OCTET_STRING_new();
if (!ret)
return NULL;
if (!ASN1_OCTET_STRING_set(ret, ipout, iplen)) {
ASN1_OCTET_STRING_free(ret);
return NULL;
}
return ret;
}
ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc)
{
ASN1_OCTET_STRING *ret = NULL;
unsigned char ipout[32];
char *iptmp = NULL, *p;
int iplen1, iplen2;
p = strchr(ipasc, '/');
if (!p)
return NULL;
iptmp = BUF_strdup(ipasc);
if (!iptmp)
return NULL;
p = iptmp + (p - ipasc);
*p++ = 0;
iplen1 = a2i_ipadd(ipout, iptmp);
if (!iplen1)
goto err;
iplen2 = a2i_ipadd(ipout + iplen1, p);
OPENSSL_free(iptmp);
iptmp = NULL;
if (!iplen2 || (iplen1 != iplen2))
goto err;
ret = ASN1_OCTET_STRING_new();
if (!ret)
goto err;
if (!ASN1_OCTET_STRING_set(ret, ipout, iplen1 + iplen2))
goto err;
return ret;
err:
if (iptmp)
OPENSSL_free(iptmp);
if (ret)
ASN1_OCTET_STRING_free(ret);
return NULL;
}
int a2i_ipadd(unsigned char *ipout, const char *ipasc)
{
/* If string contains a ':' assume IPv6 */
if (strchr(ipasc, ':')) {
if (!ipv6_from_asc(ipout, ipasc))
return 0;
return 16;
} else {
if (!ipv4_from_asc(ipout, ipasc))
return 0;
return 4;
}
}
static int ipv4_from_asc(unsigned char *v4, const char *in)
{
int a0, a1, a2, a3;
if (sscanf(in, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4)
return 0;
if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255)
|| (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255))
return 0;
v4[0] = a0;
v4[1] = a1;
v4[2] = a2;
v4[3] = a3;
return 1;
}
typedef struct {
/* Temporary store for IPV6 output */
unsigned char tmp[16];
/* Total number of bytes in tmp */
int total;
/* The position of a zero (corresponding to '::') */
int zero_pos;
/* Number of zeroes */
int zero_cnt;
} IPV6_STAT;
static int ipv6_from_asc(unsigned char *v6, const char *in)
{
IPV6_STAT v6stat;
v6stat.total = 0;
v6stat.zero_pos = -1;
v6stat.zero_cnt = 0;
/*
* Treat the IPv6 representation as a list of values separated by ':'.
* The presence of a '::' will parse as one, two or three zero length
* elements.
*/
if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat))
return 0;
/* Now for some sanity checks */
if (v6stat.zero_pos == -1) {
/* If no '::' must have exactly 16 bytes */
if (v6stat.total != 16)
return 0;
} else {
/* If '::' must have less than 16 bytes */
if (v6stat.total == 16)
return 0;
/* More than three zeroes is an error */
if (v6stat.zero_cnt > 3)
return 0;
/* Can only have three zeroes if nothing else present */
else if (v6stat.zero_cnt == 3) {
if (v6stat.total > 0)
return 0;
}
/* Can only have two zeroes if at start or end */
else if (v6stat.zero_cnt == 2) {
if ((v6stat.zero_pos != 0)
&& (v6stat.zero_pos != v6stat.total))
return 0;
} else
/* Can only have one zero if *not* start or end */
{
if ((v6stat.zero_pos == 0)
|| (v6stat.zero_pos == v6stat.total))
return 0;
}
}
/* Format result */
if (v6stat.zero_pos >= 0) {
/* Copy initial part */
memcpy(v6, v6stat.tmp, v6stat.zero_pos);
/* Zero middle */
memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
/* Copy final part */
if (v6stat.total != v6stat.zero_pos)
memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
v6stat.tmp + v6stat.zero_pos,
v6stat.total - v6stat.zero_pos);
} else
memcpy(v6, v6stat.tmp, 16);
return 1;
}
static int ipv6_cb(const char *elem, int len, void *usr)
{
IPV6_STAT *s = usr;
/* Error if 16 bytes written */
if (s->total == 16)
return 0;
if (len == 0) {
/* Zero length element, corresponds to '::' */
if (s->zero_pos == -1)
s->zero_pos = s->total;
/* If we've already got a :: its an error */
else if (s->zero_pos != s->total)
return 0;
s->zero_cnt++;
} else {
/* If more than 4 characters could be final a.b.c.d form */
if (len > 4) {
/* Need at least 4 bytes left */
if (s->total > 12)
return 0;
/* Must be end of string */
if (elem[len])
return 0;
if (!ipv4_from_asc(s->tmp + s->total, elem))
return 0;
s->total += 4;
} else {
if (!ipv6_hex(s->tmp + s->total, elem, len))
return 0;
s->total += 2;
}
}
return 1;
}
/*
* Convert a string of up to 4 hex digits into the corresponding IPv6 form.
*/
static int ipv6_hex(unsigned char *out, const char *in, int inlen)
{
unsigned char c;
unsigned int num = 0;
if (inlen > 4)
return 0;
while (inlen--) {
c = *in++;
num <<= 4;
if ((c >= '0') && (c <= '9'))
num |= c - '0';
else if ((c >= 'A') && (c <= 'F'))
num |= c - 'A' + 10;
else if ((c >= 'a') && (c <= 'f'))
num |= c - 'a' + 10;
else
return 0;
}
out[0] = num >> 8;
out[1] = num & 0xff;
return 1;
}
int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE) *dn_sk,
unsigned long chtype)
{
CONF_VALUE *v;
int i, mval;
char *p, *type;
if (!nm)
return 0;
for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++) {
v = sk_CONF_VALUE_value(dn_sk, i);
type = v->name;
/*
* Skip past any leading X. X: X, etc to allow for multiple instances
*/
for (p = type; *p; p++)
#ifndef CHARSET_EBCDIC
if ((*p == ':') || (*p == ',') || (*p == '.'))
#else
if ((*p == os_toascii[':']) || (*p == os_toascii[','])
|| (*p == os_toascii['.']))
#endif
{
p++;
if (*p)
type = p;
break;
}
#ifndef CHARSET_EBCDIC
if (*type == '+')
#else
if (*type == os_toascii['+'])
#endif
{
mval = -1;
type++;
} else
mval = 0;
if (!X509_NAME_add_entry_by_txt(nm, type, chtype,
(unsigned char *)v->value, -1, -1,
mval))
return 0;
}
return 1;
}
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