/* 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;

}