/* crypto/x509/x509name.c */

/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

 * All rights reserved.

 *

 * This package is an SSL implementation written

 * by Eric Young (eay@cryptsoft.com).

 * The implementation was written so as to conform with Netscapes SSL.

 *

 * This library is free for commercial and non-commercial use as long as

 * the following conditions are aheared to.  The following conditions

 * apply to all code found in this distribution, be it the RC4, RSA,

 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation

 * included with this distribution is covered by the same copyright terms

 * except that the holder is Tim Hudson (tjh@cryptsoft.com).

 *

 * Copyright remains Eric Young's, and as such any Copyright notices in

 * the code are not to be removed.

 * If this package is used in a product, Eric Young should be given attribution

 * as the author of the parts of the library used.

 * This can be in the form of a textual message at program startup or

 * in documentation (online or textual) provided with the package.

 *

 * 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 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 acknowledgement:

 *    "This product includes cryptographic software written by

 *     Eric Young (eay@cryptsoft.com)"

 *    The word 'cryptographic' can be left out if the rouines from the library

 *    being used are not cryptographic related :-).

 * 4. If you include any Windows specific code (or a derivative thereof) from

 *    the apps directory (application code) you must include an acknowledgement:

 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"

 *

 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND

 * ANY EXPRESS 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 AUTHOR OR 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.

 *

 * The licence and distribution terms for any publically available version or

 * derivative of this code cannot be changed.  i.e. this code cannot simply be

 * copied and put under another distribution licence

 * [including the GNU Public Licence.]

 */

#include <stdio.h>

#include <openssl/stack.h>

#include "cryptlib.h"

#include <openssl/asn1.h>

#include <openssl/objects.h>

#include <openssl/evp.h>

#include <openssl/x509.h>

int X509_NAME_get_text_by_NID(X509_NAME *name, int nid, char *buf, int len)

{

    ASN1_OBJECT *obj;

    obj = OBJ_nid2obj(nid);

    if (obj == NULL)

        return (-1);

    return (X509_NAME_get_text_by_OBJ(name, obj, buf, len));

}

int X509_NAME_get_text_by_OBJ(X509_NAME *name, ASN1_OBJECT *obj, char *buf,

                              int len)

{

    int i;

    ASN1_STRING *data;

    i = X509_NAME_get_index_by_OBJ(name, obj, -1);

    if (i < 0)

        return (-1);

    data = X509_NAME_ENTRY_get_data(X509_NAME_get_entry(name, i));

    i = (data->length > (len - 1)) ? (len - 1) : data->length;

    if (buf == NULL)

        return (data->length);

    memcpy(buf, data->data, i);

    buf[i] = '\0';

    return (i);

}

int X509_NAME_entry_count(X509_NAME *name)

{

    if (name == NULL)

        return (0);

    return (sk_X509_NAME_ENTRY_num(name->entries));

}

int X509_NAME_get_index_by_NID(X509_NAME *name, int nid, int lastpos)

{

    ASN1_OBJECT *obj;

    obj = OBJ_nid2obj(nid);

    if (obj == NULL)

        return (-2);

    return (X509_NAME_get_index_by_OBJ(name, obj, lastpos));

}

/* NOTE: you should be passsing -1, not 0 as lastpos */

int X509_NAME_get_index_by_OBJ(X509_NAME *name, ASN1_OBJECT *obj, int lastpos)

{

    int n;

    X509_NAME_ENTRY *ne;

    STACK_OF(X509_NAME_ENTRY) *sk;

    if (name == NULL)

        return (-1);

    if (lastpos < 0)

        lastpos = -1;

    sk = name->entries;

    n = sk_X509_NAME_ENTRY_num(sk);

    for (lastpos++; lastpos < n; lastpos++) {

        ne = sk_X509_NAME_ENTRY_value(sk, lastpos);

        if (OBJ_cmp(ne->object, obj) == 0)

            return (lastpos);

    }

    return (-1);

}

X509_NAME_ENTRY *X509_NAME_get_entry(X509_NAME *name, int loc)

{

    if (name == NULL || sk_X509_NAME_ENTRY_num(name->entries) <= loc

        || loc < 0)

        return (NULL);

    else

        return (sk_X509_NAME_ENTRY_value(name->entries, loc));

}

X509_NAME_ENTRY *X509_NAME_delete_entry(X509_NAME *name, int loc)

{

    X509_NAME_ENTRY *ret;

    int i, n, set_prev, set_next;

    STACK_OF(X509_NAME_ENTRY) *sk;

    if (name == NULL || sk_X509_NAME_ENTRY_num(name->entries) <= loc

        || loc < 0)

        return (NULL);

    sk = name->entries;

    ret = sk_X509_NAME_ENTRY_delete(sk, loc);

    n = sk_X509_NAME_ENTRY_num(sk);

    name->modified = 1;

    if (loc == n)

        return (ret);

    /* else we need to fixup the set field */

    if (loc != 0)

        set_prev = (sk_X509_NAME_ENTRY_value(sk, loc - 1))->set;

    else

        set_prev = ret->set - 1;

    set_next = sk_X509_NAME_ENTRY_value(sk, loc)->set;

    /*-

     * set_prev is the previous set

     * set is the current set

     * set_next is the following

     * prev  1 1    1 1     1 1     1 1

     * set   1      1       2       2

     * next  1 1    2 2     2 2     3 2

     * so basically only if prev and next differ by 2, then

     * re-number down by 1

     */

    if (set_prev + 1 < set_next)

        for (i = loc; i < n; i++)

            sk_X509_NAME_ENTRY_value(sk, i)->set--;

    return (ret);

}

int X509_NAME_add_entry_by_OBJ(X509_NAME *name, ASN1_OBJECT *obj, int type,

                               unsigned char *bytes, int len, int loc,

                               int set)

{

    X509_NAME_ENTRY *ne;

    int ret;

    ne = X509_NAME_ENTRY_create_by_OBJ(NULL, obj, type, bytes, len);

    if (!ne)

        return 0;

    ret = X509_NAME_add_entry(name, ne, loc, set);

    X509_NAME_ENTRY_free(ne);

    return ret;

}

int X509_NAME_add_entry_by_NID(X509_NAME *name, int nid, int type,

                               unsigned char *bytes, int len, int loc,

                               int set)

{

    X509_NAME_ENTRY *ne;

    int ret;

    ne = X509_NAME_ENTRY_create_by_NID(NULL, nid, type, bytes, len);

    if (!ne)

        return 0;

    ret = X509_NAME_add_entry(name, ne, loc, set);

    X509_NAME_ENTRY_free(ne);

    return ret;

}

int X509_NAME_add_entry_by_txt(X509_NAME *name, const char *field, int type,

                               const unsigned char *bytes, int len, int loc,

                               int set)

{

    X509_NAME_ENTRY *ne;

    int ret;

    ne = X509_NAME_ENTRY_create_by_txt(NULL, field, type, bytes, len);

    if (!ne)

        return 0;

    ret = X509_NAME_add_entry(name, ne, loc, set);

    X509_NAME_ENTRY_free(ne);

    return ret;

}

/*

 * if set is -1, append to previous set, 0 'a new one', and 1, prepend to the

 * guy we are about to stomp on.

 */

int X509_NAME_add_entry(X509_NAME *name, X509_NAME_ENTRY *ne, int loc,

                        int set)

{

    X509_NAME_ENTRY *new_name = NULL;

    int n, i, inc;

    STACK_OF(X509_NAME_ENTRY) *sk;

    if (name == NULL)

        return (0);

    sk = name->entries;

    n = sk_X509_NAME_ENTRY_num(sk);

    if (loc > n)

        loc = n;

    else if (loc < 0)

        loc = n;

    name->modified = 1;

    if (set == -1) {

        if (loc == 0) {

            set = 0;

            inc = 1;

        } else {

            set = sk_X509_NAME_ENTRY_value(sk, loc - 1)->set;

            inc = 0;

        }

    } else {                    /* if (set >= 0) */

        if (loc >= n) {

            if (loc != 0)

                set = sk_X509_NAME_ENTRY_value(sk, loc - 1)->set + 1;

            else

                set = 0;

        } else

            set = sk_X509_NAME_ENTRY_value(sk, loc)->set;

        inc = (set == 0) ? 1 : 0;

    }

    if ((new_name = X509_NAME_ENTRY_dup(ne)) == NULL)

        goto err;

    new_name->set = set;

    if (!sk_X509_NAME_ENTRY_insert(sk, new_name, loc)) {

        X509err(X509_F_X509_NAME_ADD_ENTRY, ERR_R_MALLOC_FAILURE);

        goto err;

    }

    if (inc) {

        n = sk_X509_NAME_ENTRY_num(sk);

        for (i = loc + 1; i < n; i++)

            sk_X509_NAME_ENTRY_value(sk, i - 1)->set += 1;

    }

    return (1);

 err:

    if (new_name != NULL)

        X509_NAME_ENTRY_free(new_name);

    return (0);

}

X509_NAME_ENTRY *X509_NAME_ENTRY_create_by_txt(X509_NAME_ENTRY **ne,

                                               const char *field, int type,

                                               const unsigned char *bytes,

                                               int len)

{

    ASN1_OBJECT *obj;

    X509_NAME_ENTRY *nentry;

    obj = OBJ_txt2obj(field, 0);

    if (obj == NULL) {

        X509err(X509_F_X509_NAME_ENTRY_CREATE_BY_TXT,

                X509_R_INVALID_FIELD_NAME);

        ERR_add_error_data(2, "name=", field);

        return (NULL);

    }

    nentry = X509_NAME_ENTRY_create_by_OBJ(ne, obj, type, bytes, len);

    ASN1_OBJECT_free(obj);

    return nentry;

}

X509_NAME_ENTRY *X509_NAME_ENTRY_create_by_NID(X509_NAME_ENTRY **ne, int nid,

                                               int type, unsigned char *bytes,

                                               int len)

{

    ASN1_OBJECT *obj;

    X509_NAME_ENTRY *nentry;

    obj = OBJ_nid2obj(nid);

    if (obj == NULL) {

        X509err(X509_F_X509_NAME_ENTRY_CREATE_BY_NID, X509_R_UNKNOWN_NID);

        return (NULL);

    }

    nentry = X509_NAME_ENTRY_create_by_OBJ(ne, obj, type, bytes, len);

    ASN1_OBJECT_free(obj);

    return nentry;

}

X509_NAME_ENTRY *X509_NAME_ENTRY_create_by_OBJ(X509_NAME_ENTRY **ne,

                                               ASN1_OBJECT *obj, int type,

                                               const unsigned char *bytes,

                                               int len)

{

    X509_NAME_ENTRY *ret;

    if ((ne == NULL) || (*ne == NULL)) {

        if ((ret = X509_NAME_ENTRY_new()) == NULL)

            return (NULL);

    } else

        ret = *ne;

    if (!X509_NAME_ENTRY_set_object(ret, obj))

        goto err;

    if (!X509_NAME_ENTRY_set_data(ret, type, bytes, len))

        goto err;

    if ((ne != NULL) && (*ne == NULL))

        *ne = ret;

    return (ret);

 err:

    if ((ne == NULL) || (ret != *ne))

        X509_NAME_ENTRY_free(ret);

    return (NULL);

}

int X509_NAME_ENTRY_set_object(X509_NAME_ENTRY *ne, ASN1_OBJECT *obj)

{

    if ((ne == NULL) || (obj == NULL)) {

        X509err(X509_F_X509_NAME_ENTRY_SET_OBJECT,

                ERR_R_PASSED_NULL_PARAMETER);

        return (0);

    }

    ASN1_OBJECT_free(ne->object);

    ne->object = OBJ_dup(obj);

    return ((ne->object == NULL) ? 0 : 1);

}

int X509_NAME_ENTRY_set_data(X509_NAME_ENTRY *ne, int type,

                             const unsigned char *bytes, int len)

{

    int i;

    if ((ne == NULL) || ((bytes == NULL) && (len != 0)))

        return (0);

    if ((type > 0) && (type & MBSTRING_FLAG))

        return ASN1_STRING_set_by_NID(&ne->value, bytes,

                                      len, type,

                                      OBJ_obj2nid(ne->object)) ? 1 : 0;

    if (len < 0)

        len = strlen((const char *)bytes);

    i = ASN1_STRING_set(ne->value, bytes, len);

    if (!i)

        return (0);

    if (type != V_ASN1_UNDEF) {

        if (type == V_ASN1_APP_CHOOSE)

            ne->value->type = ASN1_PRINTABLE_type(bytes, len);

        else

            ne->value->type = type;

    }

    return (1);

}

ASN1_OBJECT *X509_NAME_ENTRY_get_object(X509_NAME_ENTRY *ne)

{

    if (ne == NULL)

        return (NULL);

    return (ne->object);

}

ASN1_STRING *X509_NAME_ENTRY_get_data(X509_NAME_ENTRY *ne)

{

    if (ne == NULL)

        return (NULL);

    return (ne->value);

}