/* asn1_gen.c */

/*

 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project

 * 2002.

 */

/* ====================================================================

 * Copyright (c) 2002 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 "cryptlib.h"

#include <openssl/asn1.h>

#include <openssl/x509v3.h>

#define ASN1_GEN_FLAG           0x10000

#define ASN1_GEN_FLAG_IMP       (ASN1_GEN_FLAG|1)

#define ASN1_GEN_FLAG_EXP       (ASN1_GEN_FLAG|2)

#define ASN1_GEN_FLAG_TAG       (ASN1_GEN_FLAG|3)

#define ASN1_GEN_FLAG_BITWRAP   (ASN1_GEN_FLAG|4)

#define ASN1_GEN_FLAG_OCTWRAP   (ASN1_GEN_FLAG|5)

#define ASN1_GEN_FLAG_SEQWRAP   (ASN1_GEN_FLAG|6)

#define ASN1_GEN_FLAG_SETWRAP   (ASN1_GEN_FLAG|7)

#define ASN1_GEN_FLAG_FORMAT    (ASN1_GEN_FLAG|8)

#define ASN1_GEN_STR(str,val)   {str, sizeof(str) - 1, val}

#define ASN1_FLAG_EXP_MAX       20

/* Maximum number of nested sequences */

#define ASN1_GEN_SEQ_MAX_DEPTH  50

/* Input formats */

/* ASCII: default */

#define ASN1_GEN_FORMAT_ASCII   1

/* UTF8 */

#define ASN1_GEN_FORMAT_UTF8    2

/* Hex */

#define ASN1_GEN_FORMAT_HEX     3

/* List of bits */

#define ASN1_GEN_FORMAT_BITLIST 4

struct tag_name_st {

    const char *strnam;

    int len;

    int tag;

};

typedef struct {

    int exp_tag;

    int exp_class;

    int exp_constructed;

    int exp_pad;

    long exp_len;

} tag_exp_type;

typedef struct {

    int imp_tag;

    int imp_class;

    int utype;

    int format;

    const char *str;

    tag_exp_type exp_list[ASN1_FLAG_EXP_MAX];

    int exp_count;

} tag_exp_arg;

static ASN1_TYPE *generate_v3(char *str, X509V3_CTX *cnf, int depth,

                              int *perr);

static int bitstr_cb(const char *elem, int len, void *bitstr);

static int asn1_cb(const char *elem, int len, void *bitstr);

static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class,

                      int exp_constructed, int exp_pad, int imp_ok);

static int parse_tagging(const char *vstart, int vlen, int *ptag,

                         int *pclass);

static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf,

                             int depth, int *perr);

static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype);

static int asn1_str2tag(const char *tagstr, int len);

ASN1_TYPE *ASN1_generate_nconf(char *str, CONF *nconf)

{

    X509V3_CTX cnf;

    if (!nconf)

        return ASN1_generate_v3(str, NULL);

    X509V3_set_nconf(&cnf, nconf);

    return ASN1_generate_v3(str, &cnf);

}

ASN1_TYPE *ASN1_generate_v3(char *str, X509V3_CTX *cnf)

{

    int err = 0;

    ASN1_TYPE *ret = generate_v3(str, cnf, 0, &err);

    if (err)

        ASN1err(ASN1_F_ASN1_GENERATE_V3, err);

    return ret;

}

static ASN1_TYPE *generate_v3(char *str, X509V3_CTX *cnf, int depth,

                              int *perr)

{

    ASN1_TYPE *ret;

    tag_exp_arg asn1_tags;

    tag_exp_type *etmp;

    int i, len;

    unsigned char *orig_der = NULL, *new_der = NULL;

    const unsigned char *cpy_start;

    unsigned char *p;

    const unsigned char *cp;

    int cpy_len;

    long hdr_len;

    int hdr_constructed = 0, hdr_tag, hdr_class;

    int r;

    asn1_tags.imp_tag = -1;

    asn1_tags.imp_class = -1;

    asn1_tags.format = ASN1_GEN_FORMAT_ASCII;

    asn1_tags.exp_count = 0;

    if (CONF_parse_list(str, ',', 1, asn1_cb, &asn1_tags) != 0) {

        *perr = ASN1_R_UNKNOWN_TAG;

        return NULL;

    }

    if ((asn1_tags.utype == V_ASN1_SEQUENCE)

        || (asn1_tags.utype == V_ASN1_SET)) {

        if (!cnf) {

            *perr = ASN1_R_SEQUENCE_OR_SET_NEEDS_CONFIG;

            return NULL;

        }

        if (depth >= ASN1_GEN_SEQ_MAX_DEPTH) {

            *perr = ASN1_R_ILLEGAL_NESTED_TAGGING;

            return NULL;

        }

        ret = asn1_multi(asn1_tags.utype, asn1_tags.str, cnf, depth, perr);

    } else

        ret = asn1_str2type(asn1_tags.str, asn1_tags.format, asn1_tags.utype);

    if (!ret)

        return NULL;

    /* If no tagging return base type */

    if ((asn1_tags.imp_tag == -1) && (asn1_tags.exp_count == 0))

        return ret;

    /* Generate the encoding */

    cpy_len = i2d_ASN1_TYPE(ret, &orig_der);

    ASN1_TYPE_free(ret);

    ret = NULL;

    /* Set point to start copying for modified encoding */

    cpy_start = orig_der;

    /* Do we need IMPLICIT tagging? */

    if (asn1_tags.imp_tag != -1) {

        /* If IMPLICIT we will replace the underlying tag */

        /* Skip existing tag+len */

        r = ASN1_get_object(&cpy_start, &hdr_len, &hdr_tag, &hdr_class,

                            cpy_len);

        if (r & 0x80)

            goto err;

        /* Update copy length */

        cpy_len -= cpy_start - orig_der;

        /*

         * For IMPLICIT tagging the length should match the original length

         * and constructed flag should be consistent.

         */

        if (r & 0x1) {

            /* Indefinite length constructed */

            hdr_constructed = 2;

            hdr_len = 0;

        } else

            /* Just retain constructed flag */

            hdr_constructed = r & V_ASN1_CONSTRUCTED;

        /*

         * Work out new length with IMPLICIT tag: ignore constructed because

         * it will mess up if indefinite length

         */

        len = ASN1_object_size(0, hdr_len, asn1_tags.imp_tag);

    } else

        len = cpy_len;

    /* Work out length in any EXPLICIT, starting from end */

    for (i = 0, etmp = asn1_tags.exp_list + asn1_tags.exp_count - 1;

         i < asn1_tags.exp_count; i++, etmp--) {

        /* Content length: number of content octets + any padding */

        len += etmp->exp_pad;

        etmp->exp_len = len;

        /* Total object length: length including new header */

        len = ASN1_object_size(0, len, etmp->exp_tag);

    }

    /* Allocate buffer for new encoding */

    new_der = OPENSSL_malloc(len);

    if (!new_der)

        goto err;

    /* Generate tagged encoding */

    p = new_der;

    /* Output explicit tags first */

    for (i = 0, etmp = asn1_tags.exp_list; i < asn1_tags.exp_count;

         i++, etmp++) {

        ASN1_put_object(&p, etmp->exp_constructed, etmp->exp_len,

                        etmp->exp_tag, etmp->exp_class);

        if (etmp->exp_pad)

            *p++ = 0;

    }

    /* If IMPLICIT, output tag */

    if (asn1_tags.imp_tag != -1) {

        if (asn1_tags.imp_class == V_ASN1_UNIVERSAL

            && (asn1_tags.imp_tag == V_ASN1_SEQUENCE

                || asn1_tags.imp_tag == V_ASN1_SET))

            hdr_constructed = V_ASN1_CONSTRUCTED;

        ASN1_put_object(&p, hdr_constructed, hdr_len,

                        asn1_tags.imp_tag, asn1_tags.imp_class);

    }

    /* Copy across original encoding */

    memcpy(p, cpy_start, cpy_len);

    cp = new_der;

    /* Obtain new ASN1_TYPE structure */

    ret = d2i_ASN1_TYPE(NULL, &cp, len);

 err:

    if (orig_der)

        OPENSSL_free(orig_der);

    if (new_der)

        OPENSSL_free(new_der);

    return ret;

}

static int asn1_cb(const char *elem, int len, void *bitstr)

{

    tag_exp_arg *arg = bitstr;

    int i;

    int utype;

    int vlen = 0;

    const char *p, *vstart = NULL;

    int tmp_tag, tmp_class;

    if (elem == NULL)

        return -1;

    for (i = 0, p = elem; i < len; p++, i++) {

        /* Look for the ':' in name value pairs */

        if (*p == ':') {

            vstart = p + 1;

            vlen = len - (vstart - elem);

            len = p - elem;

            break;

        }

    }

    utype = asn1_str2tag(elem, len);

    if (utype == -1) {

        ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKNOWN_TAG);

        ERR_add_error_data(2, "tag=", elem);

        return -1;

    }

    /* If this is not a modifier mark end of string and exit */

    if (!(utype & ASN1_GEN_FLAG)) {

        arg->utype = utype;

        arg->str = vstart;

        /* If no value and not end of string, error */

        if (!vstart && elem[len]) {

            ASN1err(ASN1_F_ASN1_CB, ASN1_R_MISSING_VALUE);

            return -1;

        }

        return 0;

    }

    switch (utype) {

    case ASN1_GEN_FLAG_IMP:

        /* Check for illegal multiple IMPLICIT tagging */

        if (arg->imp_tag != -1) {

            ASN1err(ASN1_F_ASN1_CB, ASN1_R_ILLEGAL_NESTED_TAGGING);

            return -1;

        }

        if (!parse_tagging(vstart, vlen, &arg->imp_tag, &arg->imp_class))

            return -1;

        break;

    case ASN1_GEN_FLAG_EXP:

        if (!parse_tagging(vstart, vlen, &tmp_tag, &tmp_class))

            return -1;

        if (!append_exp(arg, tmp_tag, tmp_class, 1, 0, 0))

            return -1;

        break;

    case ASN1_GEN_FLAG_SEQWRAP:

        if (!append_exp(arg, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 1, 0, 1))

            return -1;

        break;

    case ASN1_GEN_FLAG_SETWRAP:

        if (!append_exp(arg, V_ASN1_SET, V_ASN1_UNIVERSAL, 1, 0, 1))

            return -1;

        break;

    case ASN1_GEN_FLAG_BITWRAP:

        if (!append_exp(arg, V_ASN1_BIT_STRING, V_ASN1_UNIVERSAL, 0, 1, 1))

            return -1;

        break;

    case ASN1_GEN_FLAG_OCTWRAP:

        if (!append_exp(arg, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL, 0, 0, 1))

            return -1;

        break;

    case ASN1_GEN_FLAG_FORMAT:

        if (!vstart) {

            ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKNOWN_FORMAT);

            return -1;

        }

        if (!strncmp(vstart, "ASCII", 5))

            arg->format = ASN1_GEN_FORMAT_ASCII;

        else if (!strncmp(vstart, "UTF8", 4))

            arg->format = ASN1_GEN_FORMAT_UTF8;

        else if (!strncmp(vstart, "HEX", 3))

            arg->format = ASN1_GEN_FORMAT_HEX;

        else if (!strncmp(vstart, "BITLIST", 7))

            arg->format = ASN1_GEN_FORMAT_BITLIST;

        else {

            ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKOWN_FORMAT);

            return -1;

        }

        break;

    }

    return 1;

}

static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass)

{

    char erch[2];

    long tag_num;

    char *eptr;

    if (!vstart)

        return 0;

    tag_num = strtoul(vstart, &eptr, 10);

    /* Check we haven't gone past max length: should be impossible */

    if (eptr && *eptr && (eptr > vstart + vlen))

        return 0;

    if (tag_num < 0) {

        ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_NUMBER);

        return 0;

    }

    *ptag = tag_num;

    /* If we have non numeric characters, parse them */

    if (eptr)

        vlen -= eptr - vstart;

    else

        vlen = 0;

    if (vlen) {

        switch (*eptr) {

        case 'U':

            *pclass = V_ASN1_UNIVERSAL;

            break;

        case 'A':

            *pclass = V_ASN1_APPLICATION;

            break;

        case 'P':

            *pclass = V_ASN1_PRIVATE;

            break;

        case 'C':

            *pclass = V_ASN1_CONTEXT_SPECIFIC;

            break;

        default:

            erch[0] = *eptr;

            erch[1] = 0;

            ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_MODIFIER);

            ERR_add_error_data(2, "Char=", erch);

            return 0;

            break;

        }

    } else

        *pclass = V_ASN1_CONTEXT_SPECIFIC;

    return 1;

}

/* Handle multiple types: SET and SEQUENCE */

static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf,

                             int depth, int *perr)

{

    ASN1_TYPE *ret = NULL;

    STACK_OF(ASN1_TYPE) *sk = NULL;

    STACK_OF(CONF_VALUE) *sect = NULL;

    unsigned char *der = NULL;

    int derlen;

    int i;

    sk = sk_ASN1_TYPE_new_null();

    if (!sk)

        goto bad;

    if (section) {

        if (!cnf)

            goto bad;

        sect = X509V3_get_section(cnf, (char *)section);

        if (!sect)

            goto bad;

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

            ASN1_TYPE *typ =

                generate_v3(sk_CONF_VALUE_value(sect, i)->value, cnf,

                            depth + 1, perr);

            if (!typ)

                goto bad;

            if (!sk_ASN1_TYPE_push(sk, typ))

                goto bad;

        }

    }

    /*

     * Now we has a STACK of the components, convert to the correct form

     */

    if (utype == V_ASN1_SET)

        derlen = i2d_ASN1_SET_ANY(sk, &der);

    else

        derlen = i2d_ASN1_SEQUENCE_ANY(sk, &der);

    if (derlen < 0)

        goto bad;

    if (!(ret = ASN1_TYPE_new()))

        goto bad;

    if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype)))

        goto bad;

    ret->type = utype;

    ret->value.asn1_string->data = der;

    ret->value.asn1_string->length = derlen;

    der = NULL;

 bad:

    if (der)

        OPENSSL_free(der);

    if (sk)

        sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free);

    if (sect)

        X509V3_section_free(cnf, sect);

    return ret;

}

static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class,

                      int exp_constructed, int exp_pad, int imp_ok)

{

    tag_exp_type *exp_tmp;

    /* Can only have IMPLICIT if permitted */

    if ((arg->imp_tag != -1) && !imp_ok) {

        ASN1err(ASN1_F_APPEND_EXP, ASN1_R_ILLEGAL_IMPLICIT_TAG);

        return 0;

    }

    if (arg->exp_count == ASN1_FLAG_EXP_MAX) {

        ASN1err(ASN1_F_APPEND_EXP, ASN1_R_DEPTH_EXCEEDED);

        return 0;

    }

    exp_tmp = &arg->exp_list[arg->exp_count++];

    /*

     * If IMPLICIT set tag to implicit value then reset implicit tag since it

     * has been used.

     */

    if (arg->imp_tag != -1) {

        exp_tmp->exp_tag = arg->imp_tag;

        exp_tmp->exp_class = arg->imp_class;

        arg->imp_tag = -1;

        arg->imp_class = -1;

    } else {

        exp_tmp->exp_tag = exp_tag;

        exp_tmp->exp_class = exp_class;

    }

    exp_tmp->exp_constructed = exp_constructed;

    exp_tmp->exp_pad = exp_pad;

    return 1;

}

static int asn1_str2tag(const char *tagstr, int len)

{

    unsigned int i;

    static const struct tag_name_st *tntmp, tnst[] = {

        ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN),

        ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN),

        ASN1_GEN_STR("NULL", V_ASN1_NULL),

        ASN1_GEN_STR("INT", V_ASN1_INTEGER),

        ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER),

        ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED),

        ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED),

        ASN1_GEN_STR("OID", V_ASN1_OBJECT),

        ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT),

        ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME),

        ASN1_GEN_STR("UTC", V_ASN1_UTCTIME),

        ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME),

        ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME),

        ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING),

        ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING),

        ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING),

        ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING),

        ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING),

        ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING),

        ASN1_GEN_STR("IA5", V_ASN1_IA5STRING),

        ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING),

        ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING),

        ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING),

        ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING),

        ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING),

        ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING),

        ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING),

        ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING),

        ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING),

        ASN1_GEN_STR("T61", V_ASN1_T61STRING),

        ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING),

        ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING),

        ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING),

        ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING),

        ASN1_GEN_STR("NUMERIC", V_ASN1_NUMERICSTRING),

        ASN1_GEN_STR("NUMERICSTRING", V_ASN1_NUMERICSTRING),

        /* Special cases */

        ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE),

        ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE),

        ASN1_GEN_STR("SET", V_ASN1_SET),

        /* type modifiers */

        /* Explicit tag */

        ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP),

        ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP),

        /* Implicit tag */

        ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP),

        ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP),

        /* OCTET STRING wrapper */

        ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP),

        /* SEQUENCE wrapper */

        ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP),

        /* SET wrapper */

        ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP),

        /* BIT STRING wrapper */

        ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP),

        ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT),

        ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT),

    };

    if (len == -1)

        len = strlen(tagstr);

    tntmp = tnst;

    for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st); i++, tntmp++) {

        if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len))

            return tntmp->tag;

    }

    return -1;

}

static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype)

{

    ASN1_TYPE *atmp = NULL;

    CONF_VALUE vtmp;

    unsigned char *rdata;

    long rdlen;

    int no_unused = 1;

    if (!(atmp = ASN1_TYPE_new())) {

        ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);

        return NULL;

    }

    if (!str)

        str = "";

    switch (utype) {

    case V_ASN1_NULL:

        if (str && *str) {

            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_NULL_VALUE);

            goto bad_form;

        }

        break;

    case V_ASN1_BOOLEAN:

        if (format != ASN1_GEN_FORMAT_ASCII) {

            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_NOT_ASCII_FORMAT);

            goto bad_form;

        }

        vtmp.name = NULL;

        vtmp.section = NULL;

        vtmp.value = (char *)str;

        if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean)) {

            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BOOLEAN);

            goto bad_str;

        }

        break;

    case V_ASN1_INTEGER:

    case V_ASN1_ENUMERATED:

        if (format != ASN1_GEN_FORMAT_ASCII) {

            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_INTEGER_NOT_ASCII_FORMAT);

            goto bad_form;

        }

        if (!(atmp->value.integer = s2i_ASN1_INTEGER(NULL, (char *)str))) {

            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_INTEGER);

            goto bad_str;

        }

        break;

    case V_ASN1_OBJECT:

        if (format != ASN1_GEN_FORMAT_ASCII) {

            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_OBJECT_NOT_ASCII_FORMAT);

            goto bad_form;

        }

        if (!(atmp->value.object = OBJ_txt2obj(str, 0))) {

            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_OBJECT);

            goto bad_str;

        }

        break;

    case V_ASN1_UTCTIME:

    case V_ASN1_GENERALIZEDTIME:

        if (format != ASN1_GEN_FORMAT_ASCII) {

            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_TIME_NOT_ASCII_FORMAT);

            goto bad_form;

        }

        if (!(atmp->value.asn1_string = ASN1_STRING_new())) {

            ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);

            goto bad_str;

        }

        if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1)) {

            ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);

            goto bad_str;

        }

        atmp->value.asn1_string->type = utype;

        if (!ASN1_TIME_check(atmp->value.asn1_string)) {

            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_TIME_VALUE);

            goto bad_str;

        }

        break;

    case V_ASN1_BMPSTRING:

    case V_ASN1_PRINTABLESTRING:

    case V_ASN1_IA5STRING:

    case V_ASN1_T61STRING:

    case V_ASN1_UTF8STRING:

    case V_ASN1_VISIBLESTRING:

    case V_ASN1_UNIVERSALSTRING:

    case V_ASN1_GENERALSTRING:

    case V_ASN1_NUMERICSTRING:

        if (format == ASN1_GEN_FORMAT_ASCII)

            format = MBSTRING_ASC;

        else if (format == ASN1_GEN_FORMAT_UTF8)

            format = MBSTRING_UTF8;

        else {

            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_FORMAT);

            goto bad_form;

        }

        if (ASN1_mbstring_copy(&atmp->value.asn1_string, (unsigned char *)str,

                               -1, format, ASN1_tag2bit(utype)) <= 0) {

            ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);

            goto bad_str;

        }

        break;

    case V_ASN1_BIT_STRING:

    case V_ASN1_OCTET_STRING:

        if (!(atmp->value.asn1_string = ASN1_STRING_new())) {

            ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);

            goto bad_form;

        }

        if (format == ASN1_GEN_FORMAT_HEX) {

            if (!(rdata = string_to_hex((char *)str, &rdlen))) {

                ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_HEX);

                goto bad_str;

            }

            atmp->value.asn1_string->data = rdata;

            atmp->value.asn1_string->length = rdlen;

            atmp->value.asn1_string->type = utype;

        } else if (format == ASN1_GEN_FORMAT_ASCII)

            ASN1_STRING_set(atmp->value.asn1_string, str, -1);

        else if ((format == ASN1_GEN_FORMAT_BITLIST)

                 && (utype == V_ASN1_BIT_STRING)) {

            if (!CONF_parse_list

                (str, ',', 1, bitstr_cb, atmp->value.bit_string)) {

                ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_LIST_ERROR);

                goto bad_str;

            }

            no_unused = 0;

        } else {

            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BITSTRING_FORMAT);

            goto bad_form;

        }

        if ((utype == V_ASN1_BIT_STRING) && no_unused) {

            atmp->value.asn1_string->flags

                &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);

            atmp->value.asn1_string->flags |= ASN1_STRING_FLAG_BITS_LEFT;

        }

        break;

    default:

        ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_UNSUPPORTED_TYPE);

        goto bad_str;

        break;

    }

    atmp->type = utype;

    return atmp;

 bad_str:

    ERR_add_error_data(2, "string=", str);

 bad_form:

    ASN1_TYPE_free(atmp);

    return NULL;

}

static int bitstr_cb(const char *elem, int len, void *bitstr)

{

    long bitnum;

    char *eptr;

    if (!elem)

        return 0;

    bitnum = strtoul(elem, &eptr, 10);

    if (eptr && *eptr && (eptr != elem + len))

        return 0;

    if (bitnum < 0) {

        ASN1err(ASN1_F_BITSTR_CB, ASN1_R_INVALID_NUMBER);

        return 0;

    }

    if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1)) {

        ASN1err(ASN1_F_BITSTR_CB, ERR_R_MALLOC_FAILURE);

        return 0;

    }

    return 1;

}