/*

 * Copyright 1995-2024 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the Apache License 2.0 (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/objects.h>

#include <openssl/asn1t.h>

#include <openssl/x509.h>

#include "x509_local.h"

#include <crypto/x509.h>

/*-

 * X509_ATTRIBUTE: this has the following form:

 *

 * typedef struct x509_attributes_st

 *      {

 *      ASN1_OBJECT *object;

 *      STACK_OF(ASN1_TYPE) *set;

 *      } X509_ATTRIBUTE;

 *

 */

ASN1_SEQUENCE(X509_ATTRIBUTE) = {

        ASN1_SIMPLE(X509_ATTRIBUTE, object, ASN1_OBJECT),

        ASN1_SET_OF(X509_ATTRIBUTE, set, ASN1_ANY)

} ASN1_SEQUENCE_END(X509_ATTRIBUTE)

IMPLEMENT_ASN1_FUNCTIONS(X509_ATTRIBUTE)

IMPLEMENT_ASN1_DUP_FUNCTION(X509_ATTRIBUTE)

X509_ATTRIBUTE *X509_ATTRIBUTE_create(int nid, int atrtype, void *value)

{

    X509_ATTRIBUTE *ret = NULL;

    ASN1_TYPE *val = NULL;

    ASN1_OBJECT *oid;

    if ((oid = OBJ_nid2obj(nid)) == NULL)

        return NULL;

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

        return NULL;

    ret->object = oid;

    if ((val = ASN1_TYPE_new()) == NULL)

        goto err;

    if (!sk_ASN1_TYPE_push(ret->set, val))

        goto err;

    ASN1_TYPE_set(val, atrtype, value);

    return ret;

 err:

    X509_ATTRIBUTE_free(ret);

    ASN1_TYPE_free(val);

    return NULL;

}

static int print_hex(BIO *out, unsigned char *buf, int len)

{

    int result = 1;

    char *hexbuf;

    if (len == 0)

        return 1;

    hexbuf = OPENSSL_buf2hexstr(buf, len);

    if (hexbuf == NULL)

        return 0;

    result = BIO_puts(out, hexbuf) > 0;

    OPENSSL_free(hexbuf);

    return result;

}

static int print_oid(BIO *out, const ASN1_OBJECT *oid) {

    const char *ln;

    char objbuf[80];

    int rc;

    if (OBJ_obj2txt(objbuf, sizeof(objbuf), oid, 1) <= 0)

        return 0;

    ln = OBJ_nid2ln(OBJ_obj2nid(oid));

    rc = (ln != NULL)

           ? BIO_printf(out, "%s (%s)", objbuf, ln)

           : BIO_printf(out, "%s", objbuf);

    return (rc >= 0);

}

int ossl_print_attribute_value(BIO *out,

                               int obj_nid,

                               const ASN1_TYPE *av,

                               int indent)

{

    ASN1_STRING *str;

    unsigned char *value;

    X509_NAME *xn = NULL;

    int64_t int_val;

    int ret = 1;

    switch (av->type) {

    case V_ASN1_BOOLEAN:

        if (av->value.boolean) {

            return BIO_printf(out, "%*sTRUE", indent, "") >= 4;

        } else {

            return BIO_printf(out, "%*sFALSE", indent, "") >= 5;

        }

    case V_ASN1_INTEGER:

    case V_ASN1_ENUMERATED:

        if (BIO_printf(out, "%*s", indent, "") < 0)

            return 0;

        if (ASN1_ENUMERATED_get_int64(&int_val, av->value.integer) > 0) {

            return BIO_printf(out, "%lld", (long long int)int_val) > 0;

        }

        str = av->value.integer;

        return print_hex(out, str->data, str->length);

    case V_ASN1_BIT_STRING:

        if (BIO_printf(out, "%*s", indent, "") < 0)

            return 0;

        return print_hex(out, av->value.bit_string->data,

                         av->value.bit_string->length);

    case V_ASN1_OCTET_STRING:

    case V_ASN1_VIDEOTEXSTRING:

        if (BIO_printf(out, "%*s", indent, "") < 0)

            return 0;

        return print_hex(out, av->value.octet_string->data,

                         av->value.octet_string->length);

    case V_ASN1_NULL:

        return BIO_printf(out, "%*sNULL", indent, "") >= 4;

    case V_ASN1_OBJECT:

        if (BIO_printf(out, "%*s", indent, "") < 0)

            return 0;

        return print_oid(out, av->value.object);

    /*

     * ObjectDescriptor is an IMPLICIT GraphicString, but GeneralString is a

     * superset supported by OpenSSL, so we will use that anywhere a

     * GraphicString is needed here.

     */

    case V_ASN1_GENERALSTRING:

    case V_ASN1_GRAPHICSTRING:

    case V_ASN1_OBJECT_DESCRIPTOR:

        return BIO_printf(out, "%*s%.*s", indent, "",

                          av->value.generalstring->length,

                          av->value.generalstring->data) >= 0;

    /* EXTERNAL would go here. */

    /* EMBEDDED PDV would go here. */

    case V_ASN1_UTF8STRING:

        return BIO_printf(out, "%*s%.*s", indent, "",

                          av->value.utf8string->length,

                          av->value.utf8string->data) >= 0;

    case V_ASN1_REAL:

        return BIO_printf(out, "%*sREAL", indent, "") >= 4;

    /* RELATIVE-OID would go here. */

    /* TIME would go here. */

    case V_ASN1_SEQUENCE:

        switch (obj_nid) {

        case NID_undef: /* Unrecognized OID. */

            break;

        /* Attribute types with DN syntax. */

        case NID_member:

        case NID_roleOccupant:

        case NID_seeAlso:

        case NID_manager:

        case NID_documentAuthor:

        case NID_secretary:

        case NID_associatedName:

        case NID_dITRedirect:

        case NID_owner:

            /*

             * d2i_ functions increment the ppin pointer. See doc/man3/d2i_X509.pod.

             * This preserves the original  pointer. We don't want to corrupt this

             * value.

             */

            value = av->value.sequence->data;

            xn = d2i_X509_NAME(NULL,

                               (const unsigned char **)&value,

                               av->value.sequence->length);

            if (xn == NULL) {

                BIO_puts(out, "(COULD NOT DECODE DISTINGUISHED NAME)\n");

                return 0;

            }

            if (X509_NAME_print_ex(out, xn, indent, XN_FLAG_SEP_CPLUS_SPC) <= 0)

                ret = 0;

            X509_NAME_free(xn);

            return ret;

        default:

            break;

        }

        return ASN1_parse_dump(out, av->value.sequence->data,

                               av->value.sequence->length, indent, 1) > 0;

    case V_ASN1_SET:

        return ASN1_parse_dump(out, av->value.set->data,

                               av->value.set->length, indent, 1) > 0;

    /*

     * UTCTime ::= [UNIVERSAL 23] IMPLICIT VisibleString

     * GeneralizedTime ::= [UNIVERSAL 24] IMPLICIT VisibleString

     * VisibleString is a superset for NumericString, so it will work for that.

     */

    case V_ASN1_VISIBLESTRING:

    case V_ASN1_UTCTIME:

    case V_ASN1_GENERALIZEDTIME:

    case V_ASN1_NUMERICSTRING:

        return BIO_printf(out, "%*s%.*s", indent, "",

                          av->value.visiblestring->length,

                          av->value.visiblestring->data) >= 0;

    case V_ASN1_PRINTABLESTRING:

        return BIO_printf(out, "%*s%.*s", indent, "",

                          av->value.printablestring->length,

                          av->value.printablestring->data) >= 0;

    case V_ASN1_T61STRING:

        return BIO_printf(out, "%*s%.*s", indent, "",

                          av->value.t61string->length,

                          av->value.t61string->data) >= 0;

    case V_ASN1_IA5STRING:

        return BIO_printf(out, "%*s%.*s", indent, "",

                          av->value.ia5string->length,

                          av->value.ia5string->data) >= 0;

    /* UniversalString would go here. */

    /* CHARACTER STRING would go here. */

    /* BMPString would go here. */

    /* DATE would go here. */

    /* TIME-OF-DAY would go here. */

    /* DATE-TIME would go here. */

    /* DURATION would go here. */

    /* OID-IRI would go here. */

    /* RELATIVE-OID-IRI would go here. */

    /* Would it be appropriate to just hexdump? */

    default:

        return BIO_printf(out,

                          "%*s<Unsupported tag %d>",

                          indent,

                          "",

                          av->type) >= 0;

    }

}