/* v3_alt.c */

/*

 * Written by Dr Stephen N Henson (steve@openssl.org) 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).

 *

 */

#include <stdio.h>

#include "cryptlib.h"

#include <openssl/conf.h>

#include <openssl/x509v3.h>

static GENERAL_NAMES *v2i_subject_alt(X509V3_EXT_METHOD *method,

                                      X509V3_CTX *ctx,

                                      STACK_OF(CONF_VALUE) *nval);

static GENERAL_NAMES *v2i_issuer_alt(X509V3_EXT_METHOD *method,

                                     X509V3_CTX *ctx,

                                     STACK_OF(CONF_VALUE) *nval);

static int copy_email(X509V3_CTX *ctx, GENERAL_NAMES *gens, int move_p);

static int copy_issuer(X509V3_CTX *ctx, GENERAL_NAMES *gens);

static int do_othername(GENERAL_NAME *gen, char *value, X509V3_CTX *ctx);

static int do_dirname(GENERAL_NAME *gen, char *value, X509V3_CTX *ctx);

const X509V3_EXT_METHOD v3_alt[] = {

    {NID_subject_alt_name, 0, ASN1_ITEM_ref(GENERAL_NAMES),

     0, 0, 0, 0,

     0, 0,

     (X509V3_EXT_I2V) i2v_GENERAL_NAMES,

     (X509V3_EXT_V2I)v2i_subject_alt,

     NULL, NULL, NULL},

    {NID_issuer_alt_name, 0, ASN1_ITEM_ref(GENERAL_NAMES),

     0, 0, 0, 0,

     0, 0,

     (X509V3_EXT_I2V) i2v_GENERAL_NAMES,

     (X509V3_EXT_V2I)v2i_issuer_alt,

     NULL, NULL, NULL},

    {NID_certificate_issuer, 0, ASN1_ITEM_ref(GENERAL_NAMES),

     0, 0, 0, 0,

     0, 0,

     (X509V3_EXT_I2V) i2v_GENERAL_NAMES,

     NULL, NULL, NULL, NULL},

};

STACK_OF(CONF_VALUE) *i2v_GENERAL_NAMES(X509V3_EXT_METHOD *method,

                                        GENERAL_NAMES *gens,

                                        STACK_OF(CONF_VALUE) *ret)

{

    int i;

    GENERAL_NAME *gen;

    for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {

        gen = sk_GENERAL_NAME_value(gens, i);

        ret = i2v_GENERAL_NAME(method, gen, ret);

    }

    if (!ret)

        return sk_CONF_VALUE_new_null();

    return ret;

}

STACK_OF(CONF_VALUE) *i2v_GENERAL_NAME(X509V3_EXT_METHOD *method,

                                       GENERAL_NAME *gen,

                                       STACK_OF(CONF_VALUE) *ret)

{

    unsigned char *p;

    char oline[256], htmp[5];

    int i;

    switch (gen->type) {

    case GEN_OTHERNAME:

        if (!X509V3_add_value("othername", "<unsupported>", &ret))

            return NULL;

        break;

    case GEN_X400:

        if (!X509V3_add_value("X400Name", "<unsupported>", &ret))

            return NULL;

        break;

    case GEN_EDIPARTY:

        if (!X509V3_add_value("EdiPartyName", "<unsupported>", &ret))

            return NULL;

        break;

    case GEN_EMAIL:

        if (!X509V3_add_value_uchar("email", gen->d.ia5->data, &ret))

            return NULL;

        break;

    case GEN_DNS:

        if (!X509V3_add_value_uchar("DNS", gen->d.ia5->data, &ret))

            return NULL;

        break;

    case GEN_URI:

        if (!X509V3_add_value_uchar("URI", gen->d.ia5->data, &ret))

            return NULL;

        break;

    case GEN_DIRNAME:

        if (X509_NAME_oneline(gen->d.dirn, oline, 256) == NULL

                || !X509V3_add_value("DirName", oline, &ret))

            return NULL;

        break;

    case GEN_IPADD:

        p = gen->d.ip->data;

        if (gen->d.ip->length == 4)

            BIO_snprintf(oline, sizeof oline,

                         "%d.%d.%d.%d", p[0], p[1], p[2], p[3]);

        else if (gen->d.ip->length == 16) {

            oline[0] = 0;

            for (i = 0; i < 8; i++) {

                BIO_snprintf(htmp, sizeof htmp, "%X", p[0] << 8 | p[1]);

                p += 2;

                strcat(oline, htmp);

                if (i != 7)

                    strcat(oline, ":");

            }

        } else {

            if (!X509V3_add_value("IP Address", "<invalid>", &ret))

                return NULL;

            break;

        }

        if (!X509V3_add_value("IP Address", oline, &ret))

            return NULL;

        break;

    case GEN_RID:

        i2t_ASN1_OBJECT(oline, 256, gen->d.rid);

        if (!X509V3_add_value("Registered ID", oline, &ret))

            return NULL;

        break;

    }

    return ret;

}

int GENERAL_NAME_print(BIO *out, GENERAL_NAME *gen)

{

    unsigned char *p;

    int i;

    switch (gen->type) {

    case GEN_OTHERNAME:

        BIO_printf(out, "othername:<unsupported>");

        break;

    case GEN_X400:

        BIO_printf(out, "X400Name:<unsupported>");

        break;

    case GEN_EDIPARTY:

        /* Maybe fix this: it is supported now */

        BIO_printf(out, "EdiPartyName:<unsupported>");

        break;

    case GEN_EMAIL:

        BIO_printf(out, "email:%s", gen->d.ia5->data);

        break;

    case GEN_DNS:

        BIO_printf(out, "DNS:%s", gen->d.ia5->data);

        break;

    case GEN_URI:

        BIO_printf(out, "URI:%s", gen->d.ia5->data);

        break;

    case GEN_DIRNAME:

        BIO_printf(out, "DirName: ");

        X509_NAME_print_ex(out, gen->d.dirn, 0, XN_FLAG_ONELINE);

        break;

    case GEN_IPADD:

        p = gen->d.ip->data;

        if (gen->d.ip->length == 4)

            BIO_printf(out, "IP Address:%d.%d.%d.%d", p[0], p[1], p[2], p[3]);

        else if (gen->d.ip->length == 16) {

            BIO_printf(out, "IP Address");

            for (i = 0; i < 8; i++) {

                BIO_printf(out, ":%X", p[0] << 8 | p[1]);

                p += 2;

            }

            BIO_puts(out, "\n");

        } else {

            BIO_printf(out, "IP Address:<invalid>");

            break;

        }

        break;

    case GEN_RID:

        BIO_printf(out, "Registered ID");

        i2a_ASN1_OBJECT(out, gen->d.rid);

        break;

    }

    return 1;

}

static GENERAL_NAMES *v2i_issuer_alt(X509V3_EXT_METHOD *method,

                                     X509V3_CTX *ctx,

                                     STACK_OF(CONF_VALUE) *nval)

{

    GENERAL_NAMES *gens = NULL;

    CONF_VALUE *cnf;

    int i;

    if (!(gens = sk_GENERAL_NAME_new_null())) {

        X509V3err(X509V3_F_V2I_ISSUER_ALT, ERR_R_MALLOC_FAILURE);

        return NULL;

    }

    for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {

        cnf = sk_CONF_VALUE_value(nval, i);

        if (!name_cmp(cnf->name, "issuer") && cnf->value &&

            !strcmp(cnf->value, "copy")) {

            if (!copy_issuer(ctx, gens))

                goto err;

        } else {

            GENERAL_NAME *gen;

            if (!(gen = v2i_GENERAL_NAME(method, ctx, cnf)))

                goto err;

            sk_GENERAL_NAME_push(gens, gen);

        }

    }

    return gens;

 err:

    sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);

    return NULL;

}

/* Append subject altname of issuer to issuer alt name of subject */

static int copy_issuer(X509V3_CTX *ctx, GENERAL_NAMES *gens)

{

    GENERAL_NAMES *ialt;

    GENERAL_NAME *gen;

    X509_EXTENSION *ext;

    int i;

    if (ctx && (ctx->flags == CTX_TEST))

        return 1;

    if (!ctx || !ctx->issuer_cert) {

        X509V3err(X509V3_F_COPY_ISSUER, X509V3_R_NO_ISSUER_DETAILS);

        goto err;

    }

    i = X509_get_ext_by_NID(ctx->issuer_cert, NID_subject_alt_name, -1);

    if (i < 0)

        return 1;

    if (!(ext = X509_get_ext(ctx->issuer_cert, i)) ||

        !(ialt = X509V3_EXT_d2i(ext))) {

        X509V3err(X509V3_F_COPY_ISSUER, X509V3_R_ISSUER_DECODE_ERROR);

        goto err;

    }

    for (i = 0; i < sk_GENERAL_NAME_num(ialt); i++) {

        gen = sk_GENERAL_NAME_value(ialt, i);

        if (!sk_GENERAL_NAME_push(gens, gen)) {

            X509V3err(X509V3_F_COPY_ISSUER, ERR_R_MALLOC_FAILURE);

            goto err;

        }

    }

    sk_GENERAL_NAME_free(ialt);

    return 1;

 err:

    return 0;

}

static GENERAL_NAMES *v2i_subject_alt(X509V3_EXT_METHOD *method,

                                      X509V3_CTX *ctx,

                                      STACK_OF(CONF_VALUE) *nval)

{

    GENERAL_NAMES *gens = NULL;

    CONF_VALUE *cnf;

    int i;

    if (!(gens = sk_GENERAL_NAME_new_null())) {

        X509V3err(X509V3_F_V2I_SUBJECT_ALT, ERR_R_MALLOC_FAILURE);

        return NULL;

    }

    for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {

        cnf = sk_CONF_VALUE_value(nval, i);

        if (!name_cmp(cnf->name, "email") && cnf->value &&

            !strcmp(cnf->value, "copy")) {

            if (!copy_email(ctx, gens, 0))

                goto err;

        } else if (!name_cmp(cnf->name, "email") && cnf->value &&

                   !strcmp(cnf->value, "move")) {

            if (!copy_email(ctx, gens, 1))

                goto err;

        } else {

            GENERAL_NAME *gen;

            if (!(gen = v2i_GENERAL_NAME(method, ctx, cnf)))

                goto err;

            sk_GENERAL_NAME_push(gens, gen);

        }

    }

    return gens;

 err:

    sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);

    return NULL;

}

/*

 * Copy any email addresses in a certificate or request to GENERAL_NAMES

 */

static int copy_email(X509V3_CTX *ctx, GENERAL_NAMES *gens, int move_p)

{

    X509_NAME *nm;

    ASN1_IA5STRING *email = NULL;

    X509_NAME_ENTRY *ne;

    GENERAL_NAME *gen = NULL;

    int i;

    if (ctx != NULL && ctx->flags == CTX_TEST)

        return 1;

    if (!ctx || (!ctx->subject_cert && !ctx->subject_req)) {

        X509V3err(X509V3_F_COPY_EMAIL, X509V3_R_NO_SUBJECT_DETAILS);

        goto err;

    }

    /* Find the subject name */

    if (ctx->subject_cert)

        nm = X509_get_subject_name(ctx->subject_cert);

    else

        nm = X509_REQ_get_subject_name(ctx->subject_req);

    /* Now add any email address(es) to STACK */

    i = -1;

    while ((i = X509_NAME_get_index_by_NID(nm,

                                           NID_pkcs9_emailAddress, i)) >= 0) {

        ne = X509_NAME_get_entry(nm, i);

        email = M_ASN1_IA5STRING_dup(X509_NAME_ENTRY_get_data(ne));

        if (move_p) {

            X509_NAME_delete_entry(nm, i);

            X509_NAME_ENTRY_free(ne);

            i--;

        }

        if (!email || !(gen = GENERAL_NAME_new())) {

            X509V3err(X509V3_F_COPY_EMAIL, ERR_R_MALLOC_FAILURE);

            goto err;

        }

        gen->d.ia5 = email;

        email = NULL;

        gen->type = GEN_EMAIL;

        if (!sk_GENERAL_NAME_push(gens, gen)) {

            X509V3err(X509V3_F_COPY_EMAIL, ERR_R_MALLOC_FAILURE);

            goto err;

        }

        gen = NULL;

    }

    return 1;

 err:

    GENERAL_NAME_free(gen);

    M_ASN1_IA5STRING_free(email);

    return 0;

}

GENERAL_NAMES *v2i_GENERAL_NAMES(const X509V3_EXT_METHOD *method,

                                 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval)

{

    GENERAL_NAME *gen;

    GENERAL_NAMES *gens = NULL;

    CONF_VALUE *cnf;

    int i;

    if (!(gens = sk_GENERAL_NAME_new_null())) {

        X509V3err(X509V3_F_V2I_GENERAL_NAMES, ERR_R_MALLOC_FAILURE);

        return NULL;

    }

    for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {

        cnf = sk_CONF_VALUE_value(nval, i);

        if (!(gen = v2i_GENERAL_NAME(method, ctx, cnf)))

            goto err;

        sk_GENERAL_NAME_push(gens, gen);

    }

    return gens;

 err:

    sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);

    return NULL;

}

GENERAL_NAME *v2i_GENERAL_NAME(const X509V3_EXT_METHOD *method,

                               X509V3_CTX *ctx, CONF_VALUE *cnf)

{

    return v2i_GENERAL_NAME_ex(NULL, method, ctx, cnf, 0);

}

GENERAL_NAME *a2i_GENERAL_NAME(GENERAL_NAME *out,

                               const X509V3_EXT_METHOD *method,

                               X509V3_CTX *ctx, int gen_type, char *value,

                               int is_nc)

{

    char is_string = 0;

    GENERAL_NAME *gen = NULL;

    if (!value) {

        X509V3err(X509V3_F_A2I_GENERAL_NAME, X509V3_R_MISSING_VALUE);

        return NULL;

    }

    if (out)

        gen = out;

    else {

        gen = GENERAL_NAME_new();

        if (gen == NULL) {

            X509V3err(X509V3_F_A2I_GENERAL_NAME, ERR_R_MALLOC_FAILURE);

            return NULL;

        }

    }

    switch (gen_type) {

    case GEN_URI:

    case GEN_EMAIL:

    case GEN_DNS:

        is_string = 1;

        break;

    case GEN_RID:

        {

            ASN1_OBJECT *obj;

            if (!(obj = OBJ_txt2obj(value, 0))) {

                X509V3err(X509V3_F_A2I_GENERAL_NAME, X509V3_R_BAD_OBJECT);

                ERR_add_error_data(2, "value=", value);

                goto err;

            }

            gen->d.rid = obj;

        }

        break;

    case GEN_IPADD:

        if (is_nc)

            gen->d.ip = a2i_IPADDRESS_NC(value);

        else

            gen->d.ip = a2i_IPADDRESS(value);

        if (gen->d.ip == NULL) {

            X509V3err(X509V3_F_A2I_GENERAL_NAME, X509V3_R_BAD_IP_ADDRESS);

            ERR_add_error_data(2, "value=", value);

            goto err;

        }

        break;

    case GEN_DIRNAME:

        if (!do_dirname(gen, value, ctx)) {

            X509V3err(X509V3_F_A2I_GENERAL_NAME, X509V3_R_DIRNAME_ERROR);

            goto err;

        }

        break;

    case GEN_OTHERNAME:

        if (!do_othername(gen, value, ctx)) {

            X509V3err(X509V3_F_A2I_GENERAL_NAME, X509V3_R_OTHERNAME_ERROR);

            goto err;

        }

        break;

    default:

        X509V3err(X509V3_F_A2I_GENERAL_NAME, X509V3_R_UNSUPPORTED_TYPE);

        goto err;

    }

    if (is_string) {

        if (!(gen->d.ia5 = M_ASN1_IA5STRING_new()) ||

            !ASN1_STRING_set(gen->d.ia5, (unsigned char *)value,

                             strlen(value))) {

            X509V3err(X509V3_F_A2I_GENERAL_NAME, ERR_R_MALLOC_FAILURE);

            goto err;

        }

    }

    gen->type = gen_type;

    return gen;

 err:

    if (!out)

        GENERAL_NAME_free(gen);

    return NULL;

}

GENERAL_NAME *v2i_GENERAL_NAME_ex(GENERAL_NAME *out,

                                  const X509V3_EXT_METHOD *method,

                                  X509V3_CTX *ctx, CONF_VALUE *cnf, int is_nc)

{

    int type;

    char *name, *value;

    name = cnf->name;

    value = cnf->value;

    if (!value) {

        X509V3err(X509V3_F_V2I_GENERAL_NAME_EX, X509V3_R_MISSING_VALUE);

        return NULL;

    }

    if (!name_cmp(name, "email"))

        type = GEN_EMAIL;

    else if (!name_cmp(name, "URI"))

        type = GEN_URI;

    else if (!name_cmp(name, "DNS"))

        type = GEN_DNS;

    else if (!name_cmp(name, "RID"))

        type = GEN_RID;

    else if (!name_cmp(name, "IP"))

        type = GEN_IPADD;

    else if (!name_cmp(name, "dirName"))

        type = GEN_DIRNAME;

    else if (!name_cmp(name, "otherName"))

        type = GEN_OTHERNAME;

    else {

        X509V3err(X509V3_F_V2I_GENERAL_NAME_EX, X509V3_R_UNSUPPORTED_OPTION);

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

        return NULL;

    }

    return a2i_GENERAL_NAME(out, method, ctx, type, value, is_nc);

}

static int do_othername(GENERAL_NAME *gen, char *value, X509V3_CTX *ctx)

{

    char *objtmp = NULL, *p;

    int objlen;

    if (!(p = strchr(value, ';')))

        return 0;

    if (!(gen->d.otherName = OTHERNAME_new()))

        return 0;

    /*

     * Free this up because we will overwrite it. no need to free type_id

     * because it is static

     */

    ASN1_TYPE_free(gen->d.otherName->value);

    if (!(gen->d.otherName->value = ASN1_generate_v3(p + 1, ctx)))

        return 0;

    objlen = p - value;

    objtmp = OPENSSL_malloc(objlen + 1);

    if (objtmp == NULL)

        return 0;

    strncpy(objtmp, value, objlen);

    objtmp[objlen] = 0;

    gen->d.otherName->type_id = OBJ_txt2obj(objtmp, 0);

    OPENSSL_free(objtmp);

    if (!gen->d.otherName->type_id)

        return 0;

    return 1;

}

static int do_dirname(GENERAL_NAME *gen, char *value, X509V3_CTX *ctx)

{

    int ret = 0;

    STACK_OF(CONF_VALUE) *sk = NULL;

    X509_NAME *nm = NULL;

    if (!(nm = X509_NAME_new()))

        goto err;

    sk = X509V3_get_section(ctx, value);

    if (!sk) {

        X509V3err(X509V3_F_DO_DIRNAME, X509V3_R_SECTION_NOT_FOUND);

        ERR_add_error_data(2, "section=", value);

        goto err;

    }

    /* FIXME: should allow other character types... */

    ret = X509V3_NAME_from_section(nm, sk, MBSTRING_ASC);

    if (!ret)

        goto err;

    gen->d.dirn = nm;

err:

    if (ret == 0)

        X509_NAME_free(nm);

    X509V3_section_free(ctx, sk);

    return ret;

}