/*

 * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the OpenSSL license (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

 */

#include <stdio.h>

#include "internal/cryptlib.h"

#include <openssl/safestack.h>

#include <openssl/asn1.h>

#include <openssl/objects.h>

#include <openssl/evp.h>

#include <openssl/x509.h>

#include <openssl/x509v3.h>

#include "x509_lcl.h"

int X509at_get_attr_count(const STACK_OF(X509_ATTRIBUTE) *x)

{

    return sk_X509_ATTRIBUTE_num(x);

}

int X509at_get_attr_by_NID(const STACK_OF(X509_ATTRIBUTE) *x, int nid,

                           int lastpos)

{

    const ASN1_OBJECT *obj = OBJ_nid2obj(nid);

    if (obj == NULL)

        return -2;

    return X509at_get_attr_by_OBJ(x, obj, lastpos);

}

int X509at_get_attr_by_OBJ(const STACK_OF(X509_ATTRIBUTE) *sk,

                           const ASN1_OBJECT *obj, int lastpos)

{

    int n;

    X509_ATTRIBUTE *ex;

    if (sk == NULL)

        return -1;

    lastpos++;

    if (lastpos < 0)

        lastpos = 0;

    n = sk_X509_ATTRIBUTE_num(sk);

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

        ex = sk_X509_ATTRIBUTE_value(sk, lastpos);

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

            return lastpos;

    }

    return -1;

}

X509_ATTRIBUTE *X509at_get_attr(const STACK_OF(X509_ATTRIBUTE) *x, int loc)

{

    if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0)

        return NULL;

    return sk_X509_ATTRIBUTE_value(x, loc);

}

X509_ATTRIBUTE *X509at_delete_attr(STACK_OF(X509_ATTRIBUTE) *x, int loc)

{

    X509_ATTRIBUTE *ret;

    if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0)

        return NULL;

    ret = sk_X509_ATTRIBUTE_delete(x, loc);

    return ret;

}

STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr(STACK_OF(X509_ATTRIBUTE) **x,

                                           X509_ATTRIBUTE *attr)

{

    X509_ATTRIBUTE *new_attr = NULL;

    STACK_OF(X509_ATTRIBUTE) *sk = NULL;

    if (x == NULL) {

        X509err(X509_F_X509AT_ADD1_ATTR, ERR_R_PASSED_NULL_PARAMETER);

        goto err2;

    }

    if (*x == NULL) {

        if ((sk = sk_X509_ATTRIBUTE_new_null()) == NULL)

            goto err;

    } else

        sk = *x;

    if ((new_attr = X509_ATTRIBUTE_dup(attr)) == NULL)

        goto err2;

    if (!sk_X509_ATTRIBUTE_push(sk, new_attr))

        goto err;

    if (*x == NULL)

        *x = sk;

    return sk;

 err:

    X509err(X509_F_X509AT_ADD1_ATTR, ERR_R_MALLOC_FAILURE);

 err2:

    X509_ATTRIBUTE_free(new_attr);

    sk_X509_ATTRIBUTE_free(sk);

    return NULL;

}

STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_OBJ(STACK_OF(X509_ATTRIBUTE)

                                                  **x, const ASN1_OBJECT *obj,

                                                  int type,

                                                  const unsigned char *bytes,

                                                  int len)

{

    X509_ATTRIBUTE *attr;

    STACK_OF(X509_ATTRIBUTE) *ret;

    attr = X509_ATTRIBUTE_create_by_OBJ(NULL, obj, type, bytes, len);

    if (!attr)

        return 0;

    ret = X509at_add1_attr(x, attr);

    X509_ATTRIBUTE_free(attr);

    return ret;

}

STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_NID(STACK_OF(X509_ATTRIBUTE)

                                                  **x, int nid, int type,

                                                  const unsigned char *bytes,

                                                  int len)

{

    X509_ATTRIBUTE *attr;

    STACK_OF(X509_ATTRIBUTE) *ret;

    attr = X509_ATTRIBUTE_create_by_NID(NULL, nid, type, bytes, len);

    if (!attr)

        return 0;

    ret = X509at_add1_attr(x, attr);

    X509_ATTRIBUTE_free(attr);

    return ret;

}

STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_txt(STACK_OF(X509_ATTRIBUTE)

                                                  **x, const char *attrname,

                                                  int type,

                                                  const unsigned char *bytes,

                                                  int len)

{

    X509_ATTRIBUTE *attr;

    STACK_OF(X509_ATTRIBUTE) *ret;

    attr = X509_ATTRIBUTE_create_by_txt(NULL, attrname, type, bytes, len);

    if (!attr)

        return 0;

    ret = X509at_add1_attr(x, attr);

    X509_ATTRIBUTE_free(attr);

    return ret;

}

void *X509at_get0_data_by_OBJ(STACK_OF(X509_ATTRIBUTE) *x,

                              const ASN1_OBJECT *obj, int lastpos, int type)

{

    int i;

    X509_ATTRIBUTE *at;

    i = X509at_get_attr_by_OBJ(x, obj, lastpos);

    if (i == -1)

        return NULL;

    if ((lastpos <= -2) && (X509at_get_attr_by_OBJ(x, obj, i) != -1))

        return NULL;

    at = X509at_get_attr(x, i);

    if (lastpos <= -3 && (X509_ATTRIBUTE_count(at) != 1))

        return NULL;

    return X509_ATTRIBUTE_get0_data(at, 0, type, NULL);

}

X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_NID(X509_ATTRIBUTE **attr, int nid,

                                             int atrtype, const void *data,

                                             int len)

{

    ASN1_OBJECT *obj;

    X509_ATTRIBUTE *ret;

    obj = OBJ_nid2obj(nid);

    if (obj == NULL) {

        X509err(X509_F_X509_ATTRIBUTE_CREATE_BY_NID, X509_R_UNKNOWN_NID);

        return NULL;

    }

    ret = X509_ATTRIBUTE_create_by_OBJ(attr, obj, atrtype, data, len);

    if (ret == NULL)

        ASN1_OBJECT_free(obj);

    return ret;

}

X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_OBJ(X509_ATTRIBUTE **attr,

                                             const ASN1_OBJECT *obj,

                                             int atrtype, const void *data,

                                             int len)

{

    X509_ATTRIBUTE *ret;

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

        if ((ret = X509_ATTRIBUTE_new()) == NULL) {

            X509err(X509_F_X509_ATTRIBUTE_CREATE_BY_OBJ,

                    ERR_R_MALLOC_FAILURE);

            return NULL;

        }

    } else

        ret = *attr;

    if (!X509_ATTRIBUTE_set1_object(ret, obj))

        goto err;

    if (!X509_ATTRIBUTE_set1_data(ret, atrtype, data, len))

        goto err;

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

        *attr = ret;

    return ret;

 err:

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

        X509_ATTRIBUTE_free(ret);

    return NULL;

}

X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_txt(X509_ATTRIBUTE **attr,

                                             const char *atrname, int type,

                                             const unsigned char *bytes,

                                             int len)

{

    ASN1_OBJECT *obj;

    X509_ATTRIBUTE *nattr;

    obj = OBJ_txt2obj(atrname, 0);

    if (obj == NULL) {

        X509err(X509_F_X509_ATTRIBUTE_CREATE_BY_TXT,

                X509_R_INVALID_FIELD_NAME);

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

        return NULL;

    }

    nattr = X509_ATTRIBUTE_create_by_OBJ(attr, obj, type, bytes, len);

    ASN1_OBJECT_free(obj);

    return nattr;

}

int X509_ATTRIBUTE_set1_object(X509_ATTRIBUTE *attr, const ASN1_OBJECT *obj)

{

    if ((attr == NULL) || (obj == NULL))

        return 0;

    ASN1_OBJECT_free(attr->object);

    attr->object = OBJ_dup(obj);

    return attr->object != NULL;

}

int X509_ATTRIBUTE_set1_data(X509_ATTRIBUTE *attr, int attrtype,

                             const void *data, int len)

{

    ASN1_TYPE *ttmp = NULL;

    ASN1_STRING *stmp = NULL;

    int atype = 0;

    if (!attr)

        return 0;

    if (attrtype & MBSTRING_FLAG) {

        stmp = ASN1_STRING_set_by_NID(NULL, data, len, attrtype,

                                      OBJ_obj2nid(attr->object));

        if (!stmp) {

            X509err(X509_F_X509_ATTRIBUTE_SET1_DATA, ERR_R_ASN1_LIB);

            return 0;

        }

        atype = stmp->type;

    } else if (len != -1) {

        if ((stmp = ASN1_STRING_type_new(attrtype)) == NULL)

            goto err;

        if (!ASN1_STRING_set(stmp, data, len))

            goto err;

        atype = attrtype;

    }

    /*

     * This is a bit naughty because the attribute should really have at

     * least one value but some types use and zero length SET and require

     * this.

     */

    if (attrtype == 0) {

        ASN1_STRING_free(stmp);

        return 1;

    }

    if ((ttmp = ASN1_TYPE_new()) == NULL)

        goto err;

    if ((len == -1) && !(attrtype & MBSTRING_FLAG)) {

        if (!ASN1_TYPE_set1(ttmp, attrtype, data))

            goto err;

    } else {

        ASN1_TYPE_set(ttmp, atype, stmp);

        stmp = NULL;

    }

    if (!sk_ASN1_TYPE_push(attr->set, ttmp))

        goto err;

    return 1;

 err:

    X509err(X509_F_X509_ATTRIBUTE_SET1_DATA, ERR_R_MALLOC_FAILURE);

    ASN1_TYPE_free(ttmp);

    ASN1_STRING_free(stmp);

    return 0;

}

int X509_ATTRIBUTE_count(const X509_ATTRIBUTE *attr)

{

    if (attr == NULL)

        return 0;

    return sk_ASN1_TYPE_num(attr->set);

}

ASN1_OBJECT *X509_ATTRIBUTE_get0_object(X509_ATTRIBUTE *attr)

{

    if (attr == NULL)

        return NULL;

    return attr->object;

}

void *X509_ATTRIBUTE_get0_data(X509_ATTRIBUTE *attr, int idx,

                               int atrtype, void *data)

{

    ASN1_TYPE *ttmp;

    ttmp = X509_ATTRIBUTE_get0_type(attr, idx);

    if (!ttmp)

        return NULL;

    if (atrtype != ASN1_TYPE_get(ttmp)) {

        X509err(X509_F_X509_ATTRIBUTE_GET0_DATA, X509_R_WRONG_TYPE);

        return NULL;

    }

    return ttmp->value.ptr;

}

ASN1_TYPE *X509_ATTRIBUTE_get0_type(X509_ATTRIBUTE *attr, int idx)

{

    if (attr == NULL)

        return NULL;

    return sk_ASN1_TYPE_value(attr->set, idx);

}