--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ssl/libcrypto/src/crypto/x509v3/v3_utl.c	Fri Jun 04 16:20:51 2010 +0100
@@ -0,0 +1,858 @@
+/* v3_utl.c */
+/* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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).
+ *
+ */
+ /*
+ © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.
+ */
+
+
+/* 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>
+#if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))
+#include "libcrypto_wsd_macros.h"
+#include "libcrypto_wsd.h"
+#endif
+
+static char *strip_spaces(char *name);
+static int sk_strcmp(const char * const *a, const char * const *b);
+static STACK *get_email(X509_NAME *name, GENERAL_NAMES *gens);
+static void str_free(void *str);
+static int append_ia5(STACK **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 */
+
+EXPORT_C 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;
+}
+
+EXPORT_C 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) */
+
+EXPORT_C 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);
+}
+
+EXPORT_C 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);
+}
+
+EXPORT_C 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;
+}
+
+
+EXPORT_C 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;
+}
+
+EXPORT_C 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;
+}
+
+EXPORT_C 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;
+}
+
+EXPORT_C 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;
+}
+
+EXPORT_C 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;
+}
+
+EXPORT_C 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*/
+
+EXPORT_C 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);
+	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)
+ */
+ 
+
+EXPORT_C char *hex_to_string(unsigned char *buffer, long len)
+{
+	char *tmp, *q;
+	unsigned char *p;
+	int i;
+#ifndef EMULATOR	
+	static char hexdig[] = "0123456789ABCDEF";
+#else
+    static const char hexdig[] = "0123456789ABCDEF";
+#endif	
+	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
+ */
+
+EXPORT_C unsigned char *string_to_hex(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.*
+ */
+
+EXPORT_C 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);
+}
+
+EXPORT_C STACK *X509_get1_email(X509 *x)
+{
+	GENERAL_NAMES *gens;
+	STACK *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;
+}
+
+EXPORT_C STACK *X509_REQ_get1_email(X509_REQ *x)
+{
+	GENERAL_NAMES *gens;
+	STACK_OF(X509_EXTENSION) *exts;
+	STACK *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 *get_email(X509_NAME *name, GENERAL_NAMES *gens)
+{
+	STACK *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(void *str)
+{
+	OPENSSL_free(str);
+}
+
+static int append_ia5(STACK **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_new(sk_strcmp);
+	if(!*sk) return 0;
+	/* Don't add duplicates */
+	if(sk_find(*sk, (char *)email->data) != -1) return 1;
+	emtmp = BUF_strdup((char *)email->data);
+	if(!emtmp || !sk_push(*sk, emtmp)) {
+		X509_email_free(*sk);
+		*sk = NULL;
+		return 0;
+	}
+	return 1;
+}
+
+EXPORT_C void X509_email_free(STACK *sk)
+{
+	sk_pop_free(sk, str_free);
+}
+
+/* Convert IP addresses both IPv4 and IPv6 into an 
+ * OCTET STRING compatible with RFC3280.
+ */
+
+EXPORT_C 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;
+	}
+
+EXPORT_C 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;
+	}
+	
+
+EXPORT_C 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 */
+
+	/* Copy initial part */
+	if (v6stat.zero_pos > 0)
+		memcpy(v6, v6stat.tmp, v6stat.zero_pos);
+	/* Zero middle */
+	if (v6stat.total != 16)
+		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);
+
+	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;
+	}
+
+
+EXPORT_C 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;
+	}