/* $OpenBSD: x509_crld.c,v 1.11 2026/02/07 17:12:47 bcook Exp $ */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project 1999.
 */
/* ====================================================================
 * Copyright (c) 1999-2008 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).
 *
 */

#include <stdio.h>
#include <string.h>

#include <openssl/asn1.h>
#include <openssl/asn1t.h>
#include <openssl/conf.h>
#include <openssl/x509v3.h>

#include "err_local.h"
#include "x509_local.h"

static void *v2i_crld(const X509V3_EXT_METHOD *method,
    X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval);
static int i2r_crldp(const X509V3_EXT_METHOD *method, void *pcrldp, BIO *out,
    int indent);

static const X509V3_EXT_METHOD x509v3_ext_crl_distribution_points = {
        .ext_nid = NID_crl_distribution_points,
        .ext_flags = 0,
        .it = &CRL_DIST_POINTS_it,
        .ext_new = NULL,
        .ext_free = NULL,
        .d2i = NULL,
        .i2d = NULL,
        .i2s = NULL,
        .s2i = NULL,
        .i2v = NULL,
        .v2i = v2i_crld,
        .i2r = i2r_crldp,
        .r2i = NULL,
        .usr_data = NULL,
};

const X509V3_EXT_METHOD *
x509v3_ext_method_crl_distribution_points(void)
{
        return &x509v3_ext_crl_distribution_points;
}

static const X509V3_EXT_METHOD x509v3_ext_freshest_crl = {
        .ext_nid = NID_freshest_crl,
        .ext_flags = 0,
        .it = &CRL_DIST_POINTS_it,
        .ext_new = NULL,
        .ext_free = NULL,
        .d2i = NULL,
        .i2d = NULL,
        .i2s = NULL,
        .s2i = NULL,
        .i2v = NULL,
        .v2i = v2i_crld,
        .i2r = i2r_crldp,
        .r2i = NULL,
        .usr_data = NULL,
};

const X509V3_EXT_METHOD *
x509v3_ext_method_freshest_crl(void)
{
        return &x509v3_ext_freshest_crl;
}

static STACK_OF(GENERAL_NAME) *
gnames_from_sectname(X509V3_CTX *ctx, char *sect)
{
        STACK_OF(CONF_VALUE) *gnsect;
        STACK_OF(GENERAL_NAME) *gens;

        if (*sect == '@')
                gnsect = X509V3_get0_section(ctx, sect + 1);
        else
                gnsect = X509V3_parse_list(sect);
        if (!gnsect) {
                X509V3error(X509V3_R_SECTION_NOT_FOUND);
                return NULL;
        }
        gens = v2i_GENERAL_NAMES(NULL, ctx, gnsect);
        if (*sect != '@')
                sk_CONF_VALUE_pop_free(gnsect, X509V3_conf_free);
        return gens;
}

static int
set_dist_point_name(DIST_POINT_NAME **pdp, X509V3_CTX *ctx, CONF_VALUE *cnf)
{
        STACK_OF(GENERAL_NAME) *fnm = NULL;
        STACK_OF(X509_NAME_ENTRY) *rnm = NULL;

        if (!strcmp(cnf->name, "fullname")) {
                fnm = gnames_from_sectname(ctx, cnf->value);
                if (!fnm)
                        goto err;
        } else if (!strcmp(cnf->name, "relativename")) {
                int ret;
                STACK_OF(CONF_VALUE) *dnsect;
                X509_NAME *nm;
                nm = X509_NAME_new();
                if (!nm)
                        return -1;
                dnsect = X509V3_get0_section(ctx, cnf->value);
                if (!dnsect) {
                        X509V3error(X509V3_R_SECTION_NOT_FOUND);
                        X509_NAME_free(nm);
                        return -1;
                }
                ret = X509V3_NAME_from_section(nm, dnsect, MBSTRING_ASC);
                rnm = nm->entries;
                nm->entries = NULL;
                X509_NAME_free(nm);
                if (!ret || sk_X509_NAME_ENTRY_num(rnm) <= 0)
                        goto err;
                /* Since its a name fragment can't have more than one
                 * RDNSequence
                 */
                if (sk_X509_NAME_ENTRY_value(rnm,
                    sk_X509_NAME_ENTRY_num(rnm) - 1)->set) {
                        X509V3error(X509V3_R_INVALID_MULTIPLE_RDNS);
                        goto err;
                }
        } else
                return 0;

        if (*pdp) {
                X509V3error(X509V3_R_DISTPOINT_ALREADY_SET);
                goto err;
        }

        *pdp = DIST_POINT_NAME_new();
        if (!*pdp)
                goto err;
        if (fnm) {
                (*pdp)->type = 0;
                (*pdp)->name.fullname = fnm;
        } else {
                (*pdp)->type = 1;
                (*pdp)->name.relativename = rnm;
        }

        return 1;

err:
        sk_GENERAL_NAME_pop_free(fnm, GENERAL_NAME_free);
        sk_X509_NAME_ENTRY_pop_free(rnm, X509_NAME_ENTRY_free);
        return -1;
}

static const BIT_STRING_BITNAME reason_flags[] = {
        {0, "Unused", "unused"},
        {1, "Key Compromise", "keyCompromise"},
        {2, "CA Compromise", "CACompromise"},
        {3, "Affiliation Changed", "affiliationChanged"},
        {4, "Superseded", "superseded"},
        {5, "Cessation Of Operation", "cessationOfOperation"},
        {6, "Certificate Hold", "certificateHold"},
        {7, "Privilege Withdrawn", "privilegeWithdrawn"},
        {8, "AA Compromise", "AACompromise"},
        {-1, NULL, NULL}
};

static int
set_reasons(ASN1_BIT_STRING **preas, char *value)
{
        STACK_OF(CONF_VALUE) *rsk = NULL;
        const BIT_STRING_BITNAME *pbn;
        const char *bnam;
        int i, ret = 0;

        if (*preas != NULL)
                return 0;
        rsk = X509V3_parse_list(value);
        if (rsk == NULL)
                return 0;
        for (i = 0; i < sk_CONF_VALUE_num(rsk); i++) {
                bnam = sk_CONF_VALUE_value(rsk, i)->name;
                if (!*preas) {
                        *preas = ASN1_BIT_STRING_new();
                        if (!*preas)
                                goto err;
                }
                for (pbn = reason_flags; pbn->lname; pbn++) {
                        if (!strcmp(pbn->sname, bnam)) {
                                if (!ASN1_BIT_STRING_set_bit(*preas,
                                    pbn->bitnum, 1))
                                        goto err;
                                break;
                        }
                }
                if (!pbn->lname)
                        goto err;
        }
        ret = 1;

err:
        sk_CONF_VALUE_pop_free(rsk, X509V3_conf_free);
        return ret;
}

static int
print_reasons(BIO *out, const char *rname, ASN1_BIT_STRING *rflags, int indent)
{
        int first = 1;
        const BIT_STRING_BITNAME *pbn;

        BIO_printf(out, "%*s%s:\n%*s", indent, "", rname, indent + 2, "");
        for (pbn = reason_flags; pbn->lname; pbn++) {
                if (ASN1_BIT_STRING_get_bit(rflags, pbn->bitnum)) {
                        if (first)
                                first = 0;
                        else
                                BIO_puts(out, ", ");
                        BIO_puts(out, pbn->lname);
                }
        }
        if (first)
                BIO_puts(out, "<EMPTY>\n");
        else
                BIO_puts(out, "\n");
        return 1;
}

static DIST_POINT *
crldp_from_section(X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval)
{
        int i;
        CONF_VALUE *cnf;
        DIST_POINT *point = NULL;

        point = DIST_POINT_new();
        if (!point)
                goto err;
        for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
                int ret;
                cnf = sk_CONF_VALUE_value(nval, i);
                ret = set_dist_point_name(&point->distpoint, ctx, cnf);
                if (ret > 0)
                        continue;
                if (ret < 0)
                        goto err;
                if (!strcmp(cnf->name, "reasons")) {
                        if (!set_reasons(&point->reasons, cnf->value))
                                goto err;
                }
                else if (!strcmp(cnf->name, "CRLissuer")) {
                        point->CRLissuer =
                            gnames_from_sectname(ctx, cnf->value);
                        if (!point->CRLissuer)
                                goto err;
                }
        }

        return point;

err:
        DIST_POINT_free(point);
        return NULL;
}

static void *
v2i_crld(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
    STACK_OF(CONF_VALUE) *nval)
{
        STACK_OF(DIST_POINT) *crld = NULL;
        GENERAL_NAMES *gens = NULL;
        GENERAL_NAME *gen = NULL;
        CONF_VALUE *cnf;
        int i;

        if (!(crld = sk_DIST_POINT_new_null()))
                goto merr;
        for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
                DIST_POINT *point;
                cnf = sk_CONF_VALUE_value(nval, i);
                if (!cnf->value) {
                        STACK_OF(CONF_VALUE) *dpsect;
                        dpsect = X509V3_get0_section(ctx, cnf->name);
                        if (!dpsect)
                                goto err;
                        point = crldp_from_section(ctx, dpsect);
                        if (!point)
                                goto err;
                        if (!sk_DIST_POINT_push(crld, point)) {
                                DIST_POINT_free(point);
                                goto merr;
                        }
                } else {
                        if (!(gen = v2i_GENERAL_NAME(method, ctx, cnf)))
                                goto err;
                        if (!(gens = GENERAL_NAMES_new()))
                                goto merr;
                        if (!sk_GENERAL_NAME_push(gens, gen))
                                goto merr;
                        gen = NULL;
                        if (!(point = DIST_POINT_new()))
                                goto merr;
                        if (!sk_DIST_POINT_push(crld, point)) {
                                DIST_POINT_free(point);
                                goto merr;
                        }
                        if (!(point->distpoint = DIST_POINT_NAME_new()))
                                goto merr;
                        point->distpoint->name.fullname = gens;
                        point->distpoint->type = 0;
                        gens = NULL;
                }
        }
        return crld;

merr:
        X509V3error(ERR_R_MALLOC_FAILURE);
err:
        GENERAL_NAME_free(gen);
        GENERAL_NAMES_free(gens);
        sk_DIST_POINT_pop_free(crld, DIST_POINT_free);
        return NULL;
}

static int
dpn_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg)
{
        DIST_POINT_NAME *dpn = (DIST_POINT_NAME *)*pval;

        switch (operation) {
        case ASN1_OP_NEW_POST:
                dpn->dpname = NULL;
                break;

        case ASN1_OP_FREE_POST:
                if (dpn->dpname)
                        X509_NAME_free(dpn->dpname);
                break;
        }
        return 1;
}


static const ASN1_AUX DIST_POINT_NAME_aux = {
        .app_data = NULL,
        .flags = 0,
        .ref_offset = 0,
        .ref_lock = 0,
        .asn1_cb = dpn_cb,
        .enc_offset = 0,
};
static const ASN1_TEMPLATE DIST_POINT_NAME_ch_tt[] = {
        {
                .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_SEQUENCE_OF,
                .tag = 0,
                .offset = offsetof(DIST_POINT_NAME, name.fullname),
                .field_name = "name.fullname",
                .item = &GENERAL_NAME_it,
        },
        {
                .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_SET_OF,
                .tag = 1,
                .offset = offsetof(DIST_POINT_NAME, name.relativename),
                .field_name = "name.relativename",
                .item = &X509_NAME_ENTRY_it,
        },
};

const ASN1_ITEM DIST_POINT_NAME_it = {
        .itype = ASN1_ITYPE_CHOICE,
        .utype = offsetof(DIST_POINT_NAME, type),
        .templates = DIST_POINT_NAME_ch_tt,
        .tcount = sizeof(DIST_POINT_NAME_ch_tt) / sizeof(ASN1_TEMPLATE),
        .funcs = &DIST_POINT_NAME_aux,
        .size = sizeof(DIST_POINT_NAME),
        .sname = "DIST_POINT_NAME",
};
LCRYPTO_ALIAS(DIST_POINT_NAME_it);



DIST_POINT_NAME *
d2i_DIST_POINT_NAME(DIST_POINT_NAME **a, const unsigned char **in, long len)
{
        return (DIST_POINT_NAME *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
            &DIST_POINT_NAME_it);
}
LCRYPTO_ALIAS(d2i_DIST_POINT_NAME);

int
i2d_DIST_POINT_NAME(DIST_POINT_NAME *a, unsigned char **out)
{
        return ASN1_item_i2d((ASN1_VALUE *)a, out, &DIST_POINT_NAME_it);
}
LCRYPTO_ALIAS(i2d_DIST_POINT_NAME);

DIST_POINT_NAME *
DIST_POINT_NAME_new(void)
{
        return (DIST_POINT_NAME *)ASN1_item_new(&DIST_POINT_NAME_it);
}
LCRYPTO_ALIAS(DIST_POINT_NAME_new);

void
DIST_POINT_NAME_free(DIST_POINT_NAME *a)
{
        ASN1_item_free((ASN1_VALUE *)a, &DIST_POINT_NAME_it);
}
LCRYPTO_ALIAS(DIST_POINT_NAME_free);

static const ASN1_TEMPLATE DIST_POINT_seq_tt[] = {
        {
                .flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_OPTIONAL,
                .tag = 0,
                .offset = offsetof(DIST_POINT, distpoint),
                .field_name = "distpoint",
                .item = &DIST_POINT_NAME_it,
        },
        {
                .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_OPTIONAL,
                .tag = 1,
                .offset = offsetof(DIST_POINT, reasons),
                .field_name = "reasons",
                .item = &ASN1_BIT_STRING_it,
        },
        {
                .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_SEQUENCE_OF | ASN1_TFLG_OPTIONAL,
                .tag = 2,
                .offset = offsetof(DIST_POINT, CRLissuer),
                .field_name = "CRLissuer",
                .item = &GENERAL_NAME_it,
        },
};

const ASN1_ITEM DIST_POINT_it = {
        .itype = ASN1_ITYPE_SEQUENCE,
        .utype = V_ASN1_SEQUENCE,
        .templates = DIST_POINT_seq_tt,
        .tcount = sizeof(DIST_POINT_seq_tt) / sizeof(ASN1_TEMPLATE),
        .funcs = NULL,
        .size = sizeof(DIST_POINT),
        .sname = "DIST_POINT",
};
LCRYPTO_ALIAS(DIST_POINT_it);


DIST_POINT *
d2i_DIST_POINT(DIST_POINT **a, const unsigned char **in, long len)
{
        return (DIST_POINT *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
            &DIST_POINT_it);
}
LCRYPTO_ALIAS(d2i_DIST_POINT);

int
i2d_DIST_POINT(DIST_POINT *a, unsigned char **out)
{
        return ASN1_item_i2d((ASN1_VALUE *)a, out, &DIST_POINT_it);
}
LCRYPTO_ALIAS(i2d_DIST_POINT);

DIST_POINT *
DIST_POINT_new(void)
{
        return (DIST_POINT *)ASN1_item_new(&DIST_POINT_it);
}
LCRYPTO_ALIAS(DIST_POINT_new);

void
DIST_POINT_free(DIST_POINT *a)
{
        ASN1_item_free((ASN1_VALUE *)a, &DIST_POINT_it);
}
LCRYPTO_ALIAS(DIST_POINT_free);

static const ASN1_TEMPLATE CRL_DIST_POINTS_item_tt = {
        .flags = ASN1_TFLG_SEQUENCE_OF,
        .tag = 0,
        .offset = 0,
        .field_name = "CRLDistributionPoints",
        .item = &DIST_POINT_it,
};

const ASN1_ITEM CRL_DIST_POINTS_it = {
        .itype = ASN1_ITYPE_PRIMITIVE,
        .utype = -1,
        .templates = &CRL_DIST_POINTS_item_tt,
        .tcount = 0,
        .funcs = NULL,
        .size = 0,
        .sname = "CRL_DIST_POINTS",
};
LCRYPTO_ALIAS(CRL_DIST_POINTS_it);


CRL_DIST_POINTS *
d2i_CRL_DIST_POINTS(CRL_DIST_POINTS **a, const unsigned char **in, long len)
{
        return (CRL_DIST_POINTS *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
            &CRL_DIST_POINTS_it);
}
LCRYPTO_ALIAS(d2i_CRL_DIST_POINTS);

int
i2d_CRL_DIST_POINTS(CRL_DIST_POINTS *a, unsigned char **out)
{
        return ASN1_item_i2d((ASN1_VALUE *)a, out, &CRL_DIST_POINTS_it);
}
LCRYPTO_ALIAS(i2d_CRL_DIST_POINTS);

CRL_DIST_POINTS *
CRL_DIST_POINTS_new(void)
{
        return (CRL_DIST_POINTS *)ASN1_item_new(&CRL_DIST_POINTS_it);
}
LCRYPTO_ALIAS(CRL_DIST_POINTS_new);

void
CRL_DIST_POINTS_free(CRL_DIST_POINTS *a)
{
        ASN1_item_free((ASN1_VALUE *)a, &CRL_DIST_POINTS_it);
}
LCRYPTO_ALIAS(CRL_DIST_POINTS_free);

static const ASN1_TEMPLATE ISSUING_DIST_POINT_seq_tt[] = {
        {
                .flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_OPTIONAL,
                .tag = 0,
                .offset = offsetof(ISSUING_DIST_POINT, distpoint),
                .field_name = "distpoint",
                .item = &DIST_POINT_NAME_it,
        },
        {
                .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_OPTIONAL,
                .tag = 1,
                .offset = offsetof(ISSUING_DIST_POINT, onlyuser),
                .field_name = "onlyuser",
                .item = &ASN1_FBOOLEAN_it,
        },
        {
                .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_OPTIONAL,
                .tag = 2,
                .offset = offsetof(ISSUING_DIST_POINT, onlyCA),
                .field_name = "onlyCA",
                .item = &ASN1_FBOOLEAN_it,
        },
        {
                .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_OPTIONAL,
                .tag = 3,
                .offset = offsetof(ISSUING_DIST_POINT, onlysomereasons),
                .field_name = "onlysomereasons",
                .item = &ASN1_BIT_STRING_it,
        },
        {
                .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_OPTIONAL,
                .tag = 4,
                .offset = offsetof(ISSUING_DIST_POINT, indirectCRL),
                .field_name = "indirectCRL",
                .item = &ASN1_FBOOLEAN_it,
        },
        {
                .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_OPTIONAL,
                .tag = 5,
                .offset = offsetof(ISSUING_DIST_POINT, onlyattr),
                .field_name = "onlyattr",
                .item = &ASN1_FBOOLEAN_it,
        },
};

const ASN1_ITEM ISSUING_DIST_POINT_it = {
        .itype = ASN1_ITYPE_SEQUENCE,
        .utype = V_ASN1_SEQUENCE,
        .templates = ISSUING_DIST_POINT_seq_tt,
        .tcount = sizeof(ISSUING_DIST_POINT_seq_tt) / sizeof(ASN1_TEMPLATE),
        .funcs = NULL,
        .size = sizeof(ISSUING_DIST_POINT),
        .sname = "ISSUING_DIST_POINT",
};
LCRYPTO_ALIAS(ISSUING_DIST_POINT_it);


ISSUING_DIST_POINT *
d2i_ISSUING_DIST_POINT(ISSUING_DIST_POINT **a, const unsigned char **in, long len)
{
        return (ISSUING_DIST_POINT *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
            &ISSUING_DIST_POINT_it);
}
LCRYPTO_ALIAS(d2i_ISSUING_DIST_POINT);

int
i2d_ISSUING_DIST_POINT(ISSUING_DIST_POINT *a, unsigned char **out)
{
        return ASN1_item_i2d((ASN1_VALUE *)a, out, &ISSUING_DIST_POINT_it);
}
LCRYPTO_ALIAS(i2d_ISSUING_DIST_POINT);

ISSUING_DIST_POINT *
ISSUING_DIST_POINT_new(void)
{
        return (ISSUING_DIST_POINT *)ASN1_item_new(&ISSUING_DIST_POINT_it);
}
LCRYPTO_ALIAS(ISSUING_DIST_POINT_new);

void
ISSUING_DIST_POINT_free(ISSUING_DIST_POINT *a)
{
        ASN1_item_free((ASN1_VALUE *)a, &ISSUING_DIST_POINT_it);
}
LCRYPTO_ALIAS(ISSUING_DIST_POINT_free);

static int i2r_idp(const X509V3_EXT_METHOD *method, void *pidp, BIO *out,
    int indent);
static void *v2i_idp(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
    STACK_OF(CONF_VALUE) *nval);

static const X509V3_EXT_METHOD x509v3_ext_issuing_distribution_point = {
        .ext_nid = NID_issuing_distribution_point,
        .ext_flags = X509V3_EXT_MULTILINE,
        .it = &ISSUING_DIST_POINT_it,
        .ext_new = NULL,
        .ext_free = NULL,
        .d2i = NULL,
        .i2d = NULL,
        .i2s = NULL,
        .s2i = NULL,
        .i2v = NULL,
        .v2i = v2i_idp,
        .i2r = i2r_idp,
        .r2i = NULL,
        .usr_data = NULL,
};

const X509V3_EXT_METHOD *
x509v3_ext_method_issuing_distribution_point(void)
{
        return &x509v3_ext_issuing_distribution_point;
}

static void *
v2i_idp(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
    STACK_OF(CONF_VALUE) *nval)
{
        ISSUING_DIST_POINT *idp = NULL;
        CONF_VALUE *cnf;
        char *name, *val;
        int i, ret;

        idp = ISSUING_DIST_POINT_new();
        if (!idp)
                goto merr;
        for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
                cnf = sk_CONF_VALUE_value(nval, i);
                name = cnf->name;
                val = cnf->value;
                ret = set_dist_point_name(&idp->distpoint, ctx, cnf);
                if (ret > 0)
                        continue;
                if (ret < 0)
                        goto err;
                if (!strcmp(name, "onlyuser")) {
                        if (!X509V3_get_value_bool(cnf, &idp->onlyuser))
                                goto err;
                }
                else if (!strcmp(name, "onlyCA")) {
                        if (!X509V3_get_value_bool(cnf, &idp->onlyCA))
                                goto err;
                }
                else if (!strcmp(name, "onlyAA")) {
                        if (!X509V3_get_value_bool(cnf, &idp->onlyattr))
                                goto err;
                }
                else if (!strcmp(name, "indirectCRL")) {
                        if (!X509V3_get_value_bool(cnf, &idp->indirectCRL))
                                goto err;
                }
                else if (!strcmp(name, "onlysomereasons")) {
                        if (!set_reasons(&idp->onlysomereasons, val))
                                goto err;
                } else {
                        X509V3error(X509V3_R_INVALID_NAME);
                        X509V3_conf_err(cnf);
                        goto err;
                }
        }
        return idp;

merr:
        X509V3error(ERR_R_MALLOC_FAILURE);
err:
        ISSUING_DIST_POINT_free(idp);
        return NULL;
}

static int
print_gens(BIO *out, STACK_OF(GENERAL_NAME) *gens, int indent)
{
        int i;

        for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
                BIO_printf(out, "%*s", indent + 2, "");
                GENERAL_NAME_print(out, sk_GENERAL_NAME_value(gens, i));
                BIO_puts(out, "\n");
        }
        return 1;
}

static int
print_distpoint(BIO *out, DIST_POINT_NAME *dpn, int indent)
{
        if (dpn->type == 0) {
                BIO_printf(out, "%*sFull Name:\n", indent, "");
                print_gens(out, dpn->name.fullname, indent);
        } else {
                X509_NAME ntmp;
                ntmp.entries = dpn->name.relativename;
                BIO_printf(out, "%*sRelative Name:\n%*s",
                    indent, "", indent + 2, "");
                X509_NAME_print_ex(out, &ntmp, 0, XN_FLAG_ONELINE);
                BIO_puts(out, "\n");
        }
        return 1;
}

static int
i2r_idp(const X509V3_EXT_METHOD *method, void *pidp, BIO *out, int indent)
{
        ISSUING_DIST_POINT *idp = pidp;

        if (idp->distpoint)
                print_distpoint(out, idp->distpoint, indent);
        if (idp->onlyuser > 0)
                BIO_printf(out, "%*sOnly User Certificates\n", indent, "");
        if (idp->onlyCA > 0)
                BIO_printf(out, "%*sOnly CA Certificates\n", indent, "");
        if (idp->indirectCRL > 0)
                BIO_printf(out, "%*sIndirect CRL\n", indent, "");
        if (idp->onlysomereasons)
                print_reasons(out, "Only Some Reasons",
            idp->onlysomereasons, indent);
        if (idp->onlyattr > 0)
                BIO_printf(out, "%*sOnly Attribute Certificates\n", indent, "");
        if (!idp->distpoint && (idp->onlyuser <= 0) && (idp->onlyCA <= 0) &&
            (idp->indirectCRL <= 0) && !idp->onlysomereasons &&
            (idp->onlyattr <= 0))
                BIO_printf(out, "%*s<EMPTY>\n", indent, "");

        return 1;
}

static int
i2r_crldp(const X509V3_EXT_METHOD *method, void *pcrldp, BIO *out, int indent)
{
        STACK_OF(DIST_POINT) *crld = pcrldp;
        DIST_POINT *point;
        int i;

        for (i = 0; i < sk_DIST_POINT_num(crld); i++) {
                BIO_puts(out, "\n");
                point = sk_DIST_POINT_value(crld, i);
                if (point->distpoint)
                        print_distpoint(out, point->distpoint, indent);
                if (point->reasons)
                        print_reasons(out, "Reasons", point->reasons,
                    indent);
                if (point->CRLissuer) {
                        BIO_printf(out, "%*sCRL Issuer:\n", indent, "");
                        print_gens(out, point->CRLissuer, indent);
                }
        }
        return 1;
}

int
DIST_POINT_set_dpname(DIST_POINT_NAME *dpn, X509_NAME *iname)
{
        int i;
        STACK_OF(X509_NAME_ENTRY) *frag;
        X509_NAME_ENTRY *ne;

        if (!dpn || (dpn->type != 1))
                return 1;
        frag = dpn->name.relativename;
        dpn->dpname = X509_NAME_dup(iname);
        if (!dpn->dpname)
                return 0;
        for (i = 0; i < sk_X509_NAME_ENTRY_num(frag); i++) {
                ne = sk_X509_NAME_ENTRY_value(frag, i);
                if (!X509_NAME_add_entry(dpn->dpname, ne, -1, i ? 0 : 1)) {
                        X509_NAME_free(dpn->dpname);
                        dpn->dpname = NULL;
                        return 0;
                }
        }
        /* generate cached encoding of name */
        if (i2d_X509_NAME(dpn->dpname, NULL) < 0) {
                X509_NAME_free(dpn->dpname);
                dpn->dpname = NULL;
                return 0;
        }
        return 1;
}
LCRYPTO_ALIAS(DIST_POINT_set_dpname);