Add "sections" to -help output
[openssl.git] / apps / asn1pars.c
index 0d66070..342e12d 100644 (file)
-/* apps/asn1pars.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
+/*
+ * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
  *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- * 
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to.  The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- * 
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- * 
- * 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 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 acknowledgement:
- *    "This product includes cryptographic software written by
- *     Eric Young (eay@cryptsoft.com)"
- *    The word 'cryptographic' can be left out if the rouines from the library
- *    being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from 
- *    the apps directory (application code) you must include an acknowledgement:
- *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- * 
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS 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 AUTHOR OR 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.
- * 
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed.  i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
-
-/* A nice addition from Dr Stephen Henson <steve@openssl.org> to 
- * add the -strparse option which parses nested binary structures
+ * 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 <stdlib.h>
 #include <string.h>
 #include "apps.h"
+#include "progs.h"
 #include <openssl/err.h>
 #include <openssl/evp.h>
 #include <openssl/x509.h>
 #include <openssl/pem.h>
-
-/* -inform arg - input format - default PEM (DER or PEM)
- * -in arg     - input file - default stdin
- * -i          - indent the details by depth
- * -offset     - where in the file to start
- * -length     - how many bytes to use
- * -oid file   - extra oid description file
- */
-
-#undef PROG
-#define PROG   asn1parse_main
-
-int MAIN(int, char **);
-
-static int do_generate(BIO *bio, char *genstr, char *genconf, BUF_MEM *buf);
-
-int MAIN(int argc, char **argv)
-       {
-       int i,badops=0,offset=0,ret=1,j;
-       unsigned int length=0;
-       long num,tmplen;
-       BIO *in=NULL,*out=NULL,*b64=NULL, *derout = NULL;
-       int informat,indent=0, noout = 0, dump = 0;
-       char *infile=NULL,*str=NULL,*prog,*oidfile=NULL, *derfile=NULL;
-       char *genstr=NULL, *genconf=NULL;
-       unsigned char *tmpbuf;
-       const unsigned char *ctmpbuf;
-       BUF_MEM *buf=NULL;
-       STACK_OF(OPENSSL_STRING) *osk=NULL;
-       ASN1_TYPE *at=NULL;
-
-       informat=FORMAT_PEM;
-
-       apps_startup();
-
-       if (bio_err == NULL)
-               if ((bio_err=BIO_new(BIO_s_file())) != NULL)
-                       BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
-
-       if (!load_config(bio_err, NULL))
-               goto end;
-
-       prog=argv[0];
-       argc--;
-       argv++;
-       if ((osk=sk_OPENSSL_STRING_new_null()) == NULL)
-               {
-               BIO_printf(bio_err,"Memory allocation failure\n");
-               goto end;
-               }
-       while (argc >= 1)
-               {
-               if      (strcmp(*argv,"-inform") == 0)
-                       {
-                       if (--argc < 1) goto bad;
-                       informat=str2fmt(*(++argv));
-                       }
-               else if (strcmp(*argv,"-in") == 0)
-                       {
-                       if (--argc < 1) goto bad;
-                       infile= *(++argv);
-                       }
-               else if (strcmp(*argv,"-out") == 0)
-                       {
-                       if (--argc < 1) goto bad;
-                       derfile= *(++argv);
-                       }
-               else if (strcmp(*argv,"-i") == 0)
-                       {
-                       indent=1;
-                       }
-               else if (strcmp(*argv,"-noout") == 0) noout = 1;
-               else if (strcmp(*argv,"-oid") == 0)
-                       {
-                       if (--argc < 1) goto bad;
-                       oidfile= *(++argv);
-                       }
-               else if (strcmp(*argv,"-offset") == 0)
-                       {
-                       if (--argc < 1) goto bad;
-                       offset= atoi(*(++argv));
-                       }
-               else if (strcmp(*argv,"-length") == 0)
-                       {
-                       if (--argc < 1) goto bad;
-                       length= atoi(*(++argv));
-                       if (length == 0) goto bad;
-                       }
-               else if (strcmp(*argv,"-dump") == 0)
-                       {
-                       dump= -1;
-                       }
-               else if (strcmp(*argv,"-dlimit") == 0)
-                       {
-                       if (--argc < 1) goto bad;
-                       dump= atoi(*(++argv));
-                       if (dump <= 0) goto bad;
-                       }
-               else if (strcmp(*argv,"-strparse") == 0)
-                       {
-                       if (--argc < 1) goto bad;
-                       sk_OPENSSL_STRING_push(osk,*(++argv));
-                       }
-               else if (strcmp(*argv,"-genstr") == 0)
-                       {
-                       if (--argc < 1) goto bad;
-                       genstr= *(++argv);
-                       }
-               else if (strcmp(*argv,"-genconf") == 0)
-                       {
-                       if (--argc < 1) goto bad;
-                       genconf= *(++argv);
-                       }
-               else
-                       {
-                       BIO_printf(bio_err,"unknown option %s\n",*argv);
-                       badops=1;
-                       break;
-                       }
-               argc--;
-               argv++;
-               }
-
-       if (badops)
-               {
-bad:
-               BIO_printf(bio_err,"%s [options] <infile\n",prog);
-               BIO_printf(bio_err,"where options are\n");
-               BIO_printf(bio_err," -inform arg   input format - one of DER PEM\n");
-               BIO_printf(bio_err," -in arg       input file\n");
-               BIO_printf(bio_err," -out arg      output file (output format is always DER\n");
-               BIO_printf(bio_err," -noout arg    don't produce any output\n");
-               BIO_printf(bio_err," -offset arg   offset into file\n");
-               BIO_printf(bio_err," -length arg   length of section in file\n");
-               BIO_printf(bio_err," -i            indent entries\n");
-               BIO_printf(bio_err," -dump         dump unknown data in hex form\n");
-               BIO_printf(bio_err," -dlimit arg   dump the first arg bytes of unknown data in hex form\n");
-               BIO_printf(bio_err," -oid file     file of extra oid definitions\n");
-               BIO_printf(bio_err," -strparse offset\n");
-               BIO_printf(bio_err,"               a series of these can be used to 'dig' into multiple\n");
-               BIO_printf(bio_err,"               ASN1 blob wrappings\n");
-               BIO_printf(bio_err," -genstr str   string to generate ASN1 structure from\n");
-               BIO_printf(bio_err," -genconf file file to generate ASN1 structure from\n");
-               goto end;
-               }
-
-       ERR_load_crypto_strings();
-
-       in=BIO_new(BIO_s_file());
-       out=BIO_new(BIO_s_file());
-       if ((in == NULL) || (out == NULL))
-               {
-               ERR_print_errors(bio_err);
-               goto end;
-               }
-       BIO_set_fp(out,stdout,BIO_NOCLOSE|BIO_FP_TEXT);
-#ifdef OPENSSL_SYS_VMS
-       {
-       BIO *tmpbio = BIO_new(BIO_f_linebuffer());
-       out = BIO_push(tmpbio, out);
-       }
-#endif
-
-       if (oidfile != NULL)
-               {
-               if (BIO_read_filename(in,oidfile) <= 0)
-                       {
-                       BIO_printf(bio_err,"problems opening %s\n",oidfile);
-                       ERR_print_errors(bio_err);
-                       goto end;
-                       }
-               OBJ_create_objects(in);
-               }
-
-       if (infile == NULL)
-               BIO_set_fp(in,stdin,BIO_NOCLOSE);
-       else
-               {
-               if (BIO_read_filename(in,infile) <= 0)
-                       {
-                       perror(infile);
-                       goto end;
-                       }
-               }
-
-       if (derfile) {
-               if(!(derout = BIO_new_file(derfile, "wb"))) {
-                       BIO_printf(bio_err,"problems opening %s\n",derfile);
-                       ERR_print_errors(bio_err);
-                       goto end;
-               }
-       }
-
-       if ((buf=BUF_MEM_new()) == NULL) goto end;
-       if (!BUF_MEM_grow(buf,BUFSIZ*8)) goto end; /* Pre-allocate :-) */
-
-       if (genstr || genconf)
-               {
-               num = do_generate(bio_err, genstr, genconf, buf);
-               if (num < 0)
-                       {
-                       ERR_print_errors(bio_err);
-                       goto end;
-                       }
-               }
-
-       else
-               {
-
-               if (informat == FORMAT_PEM)
-                       {
-                       BIO *tmp;
-
-                       if ((b64=BIO_new(BIO_f_base64())) == NULL)
-                               goto end;
-                       BIO_push(b64,in);
-                       tmp=in;
-                       in=b64;
-                       b64=tmp;
-                       }
-
-               num=0;
-               for (;;)
-                       {
-                       if (!BUF_MEM_grow(buf,(int)num+BUFSIZ)) goto end;
-                       i=BIO_read(in,&(buf->data[num]),BUFSIZ);
-                       if (i <= 0) break;
-                       num+=i;
-                       }
-               }
-       str=buf->data;
-
-       /* If any structs to parse go through in sequence */
-
-       if (sk_OPENSSL_STRING_num(osk))
-               {
-               tmpbuf=(unsigned char *)str;
-               tmplen=num;
-               for (i=0; i<sk_OPENSSL_STRING_num(osk); i++)
-                       {
-                       ASN1_TYPE *atmp;
-                       int typ;
-                       j=atoi(sk_OPENSSL_STRING_value(osk,i));
-                       if (j == 0)
-                               {
-                               BIO_printf(bio_err,"'%s' is an invalid number\n",sk_OPENSSL_STRING_value(osk,i));
-                               continue;
-                               }
-                       tmpbuf+=j;
-                       tmplen-=j;
-                       atmp = at;
-                       ctmpbuf = tmpbuf;
-                       at = d2i_ASN1_TYPE(NULL,&ctmpbuf,tmplen);
-                       ASN1_TYPE_free(atmp);
-                       if(!at)
-                               {
-                               BIO_printf(bio_err,"Error parsing structure\n");
-                               ERR_print_errors(bio_err);
-                               goto end;
-                               }
-                       typ = ASN1_TYPE_get(at);
-                       if ((typ == V_ASN1_OBJECT)
-                               || (typ == V_ASN1_NULL))
-                               {
-                               BIO_printf(bio_err, "Can't parse %s type\n",
-                                       typ == V_ASN1_NULL ? "NULL" : "OBJECT");
-                               ERR_print_errors(bio_err);
-                               goto end;
-                               }
-                       /* hmm... this is a little evil but it works */
-                       tmpbuf=at->value.asn1_string->data;
-                       tmplen=at->value.asn1_string->length;
-                       }
-               str=(char *)tmpbuf;
-               num=tmplen;
-               }
-
-       if (offset >= num)
-               {
-               BIO_printf(bio_err, "Error: offset too large\n");
-               goto end;
-               }
-
-       num -= offset;
-
-       if ((length == 0) || ((long)length > num)) length=(unsigned int)num;
-       if(derout) {
-               if(BIO_write(derout, str + offset, length) != (int)length) {
-                       BIO_printf(bio_err, "Error writing output\n");
-                       ERR_print_errors(bio_err);
-                       goto end;
-               }
-       }
-       if (!noout &&
-           !ASN1_parse_dump(out,(unsigned char *)&(str[offset]),length,
-                   indent,dump))
-               {
-               ERR_print_errors(bio_err);
-               goto end;
-               }
-       ret=0;
-end:
-       BIO_free(derout);
-       if (in != NULL) BIO_free(in);
-       if (out != NULL) BIO_free_all(out);
-       if (b64 != NULL) BIO_free(b64);
-       if (ret != 0)
-               ERR_print_errors(bio_err);
-       if (buf != NULL) BUF_MEM_free(buf);
-       if (at != NULL) ASN1_TYPE_free(at);
-       if (osk != NULL) sk_OPENSSL_STRING_free(osk);
-       OBJ_cleanup();
-       apps_shutdown();
-       OPENSSL_EXIT(ret);
-       }
-
-static int do_generate(BIO *bio, char *genstr, char *genconf, BUF_MEM *buf)
-       {
-       CONF *cnf = NULL;
-       int len;
-       long errline;
-       unsigned char *p;
-       ASN1_TYPE *atyp = NULL;
-
-       if (genconf)
-               {
-               cnf = NCONF_new(NULL);
-               if (!NCONF_load(cnf, genconf, &errline))
-                       goto conferr;
-               if (!genstr)
-                       genstr = NCONF_get_string(cnf, "default", "asn1");
-               if (!genstr)
-                       {
-                       BIO_printf(bio, "Can't find 'asn1' in '%s'\n", genconf);
-                       goto err;
-                       }
-               }
-
-       atyp = ASN1_generate_nconf(genstr, cnf);
-       NCONF_free(cnf);
-       cnf = NULL;
-
-       if (!atyp)
-               return -1;
-
-       len = i2d_ASN1_TYPE(atyp, NULL);
-
-       if (len <= 0)
-               goto err;
-
-       if (!BUF_MEM_grow(buf,len))
-               goto err;
-
-       p=(unsigned char *)buf->data;
-
-       i2d_ASN1_TYPE(atyp, &p);
-
-       ASN1_TYPE_free(atyp);
-       return len;
-
-       conferr:
-
-       if (errline > 0)
-               BIO_printf(bio, "Error on line %ld of config file '%s'\n",
-                                                       errline, genconf);
-       else
-               BIO_printf(bio, "Error loading config file '%s'\n", genconf);
-
-       err:
-       NCONF_free(cnf);
-       ASN1_TYPE_free(atyp);
-
-       return -1;
-
-       }
+#include <openssl/asn1t.h>
+
+typedef enum OPTION_choice {
+    OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
+    OPT_INFORM, OPT_IN, OPT_OUT, OPT_INDENT, OPT_NOOUT,
+    OPT_OID, OPT_OFFSET, OPT_LENGTH, OPT_DUMP, OPT_DLIMIT,
+    OPT_STRPARSE, OPT_GENSTR, OPT_GENCONF, OPT_STRICTPEM,
+    OPT_ITEM
+} OPTION_CHOICE;
+
+const OPTIONS asn1parse_options[] = {
+    OPT_SECTION("General"),
+    {"help", OPT_HELP, '-', "Display this summary"},
+    {"oid", OPT_OID, '<', "file of extra oid definitions"},
+
+    OPT_SECTION("I/O"),
+    {"inform", OPT_INFORM, 'F', "input format - one of DER PEM"},
+    {"in", OPT_IN, '<', "input file"},
+    {"out", OPT_OUT, '>', "output file (output format is always DER)"},
+    {"noout", OPT_NOOUT, 0, "do not produce any output"},
+    {"offset", OPT_OFFSET, 'p', "offset into file"},
+    {"length", OPT_LENGTH, 'p', "length of section in file"},
+    {"strparse", OPT_STRPARSE, 'p',
+     "offset; a series of these can be used to 'dig'"},
+    {"genstr", OPT_GENSTR, 's', "string to generate ASN1 structure from"},
+    {OPT_MORE_STR, 0, 0, "into multiple ASN1 blob wrappings"},
+    {"genconf", OPT_GENCONF, 's', "file to generate ASN1 structure from"},
+    {"strictpem", OPT_STRICTPEM, 0,
+     "do not attempt base64 decode outside PEM markers"},
+    {"item", OPT_ITEM, 's', "item to parse and print"},
+    {OPT_MORE_STR, 0, 0, "(-inform  will be ignored)"},
+
+    OPT_SECTION("Formatting"),
+    {"i", OPT_INDENT, 0, "indents the output"},
+    {"dump", OPT_DUMP, 0, "unknown data in hex form"},
+    {"dlimit", OPT_DLIMIT, 'p',
+     "dump the first arg bytes of unknown data in hex form"},
+    {NULL}
+};
+
+static int do_generate(char *genstr, const char *genconf, BUF_MEM *buf);
+
+int asn1parse_main(int argc, char **argv)
+{
+    ASN1_TYPE *at = NULL;
+    BIO *in = NULL, *b64 = NULL, *derout = NULL;
+    BUF_MEM *buf = NULL;
+    STACK_OF(OPENSSL_STRING) *osk = NULL;
+    char *genstr = NULL, *genconf = NULL;
+    char *infile = NULL, *oidfile = NULL, *derfile = NULL;
+    unsigned char *str = NULL;
+    char *name = NULL, *header = NULL, *prog;
+    const unsigned char *ctmpbuf;
+    int indent = 0, noout = 0, dump = 0, strictpem = 0, informat = FORMAT_PEM;
+    int offset = 0, ret = 1, i, j;
+    long num, tmplen;
+    unsigned char *tmpbuf;
+    unsigned int length = 0;
+    OPTION_CHOICE o;
+    const ASN1_ITEM *it = NULL;
+
+    prog = opt_init(argc, argv, asn1parse_options);
+
+    if ((osk = sk_OPENSSL_STRING_new_null()) == NULL) {
+        BIO_printf(bio_err, "%s: Memory allocation failure\n", prog);
+        goto end;
+    }
+
+    while ((o = opt_next()) != OPT_EOF) {
+        switch (o) {
+        case OPT_EOF:
+        case OPT_ERR:
+ opthelp:
+            BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
+            goto end;
+        case OPT_HELP:
+            opt_help(asn1parse_options);
+            ret = 0;
+            goto end;
+        case OPT_INFORM:
+            if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
+                goto opthelp;
+            break;
+        case OPT_IN:
+            infile = opt_arg();
+            break;
+        case OPT_OUT:
+            derfile = opt_arg();
+            break;
+        case OPT_INDENT:
+            indent = 1;
+            break;
+        case OPT_NOOUT:
+            noout = 1;
+            break;
+        case OPT_OID:
+            oidfile = opt_arg();
+            break;
+        case OPT_OFFSET:
+            offset = strtol(opt_arg(), NULL, 0);
+            break;
+        case OPT_LENGTH:
+            length = strtol(opt_arg(), NULL, 0);
+            break;
+        case OPT_DUMP:
+            dump = -1;
+            break;
+        case OPT_DLIMIT:
+            dump = strtol(opt_arg(), NULL, 0);
+            break;
+        case OPT_STRPARSE:
+            sk_OPENSSL_STRING_push(osk, opt_arg());
+            break;
+        case OPT_GENSTR:
+            genstr = opt_arg();
+            break;
+        case OPT_GENCONF:
+            genconf = opt_arg();
+            break;
+        case OPT_STRICTPEM:
+            strictpem = 1;
+            informat = FORMAT_PEM;
+            break;
+        case OPT_ITEM:
+            it = ASN1_ITEM_lookup(opt_arg());
+            if (it == NULL) {
+                size_t tmp;
+
+                BIO_printf(bio_err, "Unknown item name %s\n", opt_arg());
+                BIO_puts(bio_err, "Supported types:\n");
+                for (tmp = 0;; tmp++) {
+                    it = ASN1_ITEM_get(tmp);
+                    if (it == NULL)
+                        break;
+                    BIO_printf(bio_err, "    %s\n", it->sname);
+                }
+                goto end;
+            }
+            break;
+        }
+    }
+    argc = opt_num_rest();
+    if (argc != 0)
+        goto opthelp;
+
+    if (oidfile != NULL) {
+        in = bio_open_default(oidfile, 'r', FORMAT_TEXT);
+        if (in == NULL)
+            goto end;
+        OBJ_create_objects(in);
+        BIO_free(in);
+    }
+
+    if ((in = bio_open_default(infile, 'r', informat)) == NULL)
+        goto end;
+
+    if (derfile && (derout = bio_open_default(derfile, 'w', FORMAT_ASN1)) == NULL)
+        goto end;
+
+    if ((buf = BUF_MEM_new()) == NULL)
+        goto end;
+    if (strictpem) {
+        if (PEM_read_bio(in, &name, &header, &str, &num) != 1) {
+            BIO_printf(bio_err, "Error reading PEM file\n");
+            ERR_print_errors(bio_err);
+            goto end;
+        }
+        buf->data = (char *)str;
+        buf->length = buf->max = num;
+    } else {
+        if (!BUF_MEM_grow(buf, BUFSIZ * 8))
+            goto end;           /* Pre-allocate :-) */
+
+        if (genstr || genconf) {
+            num = do_generate(genstr, genconf, buf);
+            if (num < 0) {
+                ERR_print_errors(bio_err);
+                goto end;
+            }
+        } else {
+
+            if (informat == FORMAT_PEM) {
+                BIO *tmp;
+
+                if ((b64 = BIO_new(BIO_f_base64())) == NULL)
+                    goto end;
+                BIO_push(b64, in);
+                tmp = in;
+                in = b64;
+                b64 = tmp;
+            }
+
+            num = 0;
+            for (;;) {
+                if (!BUF_MEM_grow(buf, num + BUFSIZ))
+                    goto end;
+                i = BIO_read(in, &(buf->data[num]), BUFSIZ);
+                if (i <= 0)
+                    break;
+                num += i;
+            }
+        }
+        str = (unsigned char *)buf->data;
+
+    }
+
+    /* If any structs to parse go through in sequence */
+
+    if (sk_OPENSSL_STRING_num(osk)) {
+        tmpbuf = str;
+        tmplen = num;
+        for (i = 0; i < sk_OPENSSL_STRING_num(osk); i++) {
+            ASN1_TYPE *atmp;
+            int typ;
+            j = strtol(sk_OPENSSL_STRING_value(osk, i), NULL, 0);
+            if (j <= 0 || j >= tmplen) {
+                BIO_printf(bio_err, "'%s' is out of range\n",
+                           sk_OPENSSL_STRING_value(osk, i));
+                continue;
+            }
+            tmpbuf += j;
+            tmplen -= j;
+            atmp = at;
+            ctmpbuf = tmpbuf;
+            at = d2i_ASN1_TYPE(NULL, &ctmpbuf, tmplen);
+            ASN1_TYPE_free(atmp);
+            if (!at) {
+                BIO_printf(bio_err, "Error parsing structure\n");
+                ERR_print_errors(bio_err);
+                goto end;
+            }
+            typ = ASN1_TYPE_get(at);
+            if ((typ == V_ASN1_OBJECT)
+                || (typ == V_ASN1_BOOLEAN)
+                || (typ == V_ASN1_NULL)) {
+                BIO_printf(bio_err, "Can't parse %s type\n", ASN1_tag2str(typ));
+                ERR_print_errors(bio_err);
+                goto end;
+            }
+            /* hmm... this is a little evil but it works */
+            tmpbuf = at->value.asn1_string->data;
+            tmplen = at->value.asn1_string->length;
+        }
+        str = tmpbuf;
+        num = tmplen;
+    }
+
+    if (offset < 0 || offset >= num) {
+        BIO_printf(bio_err, "Error: offset out of range\n");
+        goto end;
+    }
+
+    num -= offset;
+
+    if (length == 0 || length > (unsigned int)num)
+        length = (unsigned int)num;
+    if (derout != NULL) {
+        if (BIO_write(derout, str + offset, length) != (int)length) {
+            BIO_printf(bio_err, "Error writing output\n");
+            ERR_print_errors(bio_err);
+            goto end;
+        }
+    }
+    if (!noout) {
+        const unsigned char *p = str + offset;
+
+        if (it != NULL) {
+            ASN1_VALUE *value = ASN1_item_d2i(NULL, &p, length, it);
+            if (value == NULL) {
+                BIO_printf(bio_err, "Error parsing item %s\n", it->sname);
+                ERR_print_errors(bio_err);
+                goto end;
+            }
+            ASN1_item_print(bio_out, value, 0, it, NULL);
+            ASN1_item_free(value, it);
+        } else {
+            if (!ASN1_parse_dump(bio_out, p, length, indent, dump)) {
+                ERR_print_errors(bio_err);
+                goto end;
+            }
+        }
+    }
+    ret = 0;
+ end:
+    BIO_free(derout);
+    BIO_free(in);
+    BIO_free(b64);
+    if (ret != 0)
+        ERR_print_errors(bio_err);
+    BUF_MEM_free(buf);
+    OPENSSL_free(name);
+    OPENSSL_free(header);
+    ASN1_TYPE_free(at);
+    sk_OPENSSL_STRING_free(osk);
+    return ret;
+}
+
+static int do_generate(char *genstr, const char *genconf, BUF_MEM *buf)
+{
+    CONF *cnf = NULL;
+    int len;
+    unsigned char *p;
+    ASN1_TYPE *atyp = NULL;
+
+    if (genconf != NULL) {
+        if ((cnf = app_load_config(genconf)) == NULL)
+            goto err;
+        if (genstr == NULL)
+            genstr = NCONF_get_string(cnf, "default", "asn1");
+        if (genstr == NULL) {
+            BIO_printf(bio_err, "Can't find 'asn1' in '%s'\n", genconf);
+            goto err;
+        }
+    }
+
+    atyp = ASN1_generate_nconf(genstr, cnf);
+    NCONF_free(cnf);
+    cnf = NULL;
+
+    if (atyp == NULL)
+        return -1;
+
+    len = i2d_ASN1_TYPE(atyp, NULL);
+
+    if (len <= 0)
+        goto err;
+
+    if (!BUF_MEM_grow(buf, len))
+        goto err;
+
+    p = (unsigned char *)buf->data;
+
+    i2d_ASN1_TYPE(atyp, &p);
+
+    ASN1_TYPE_free(atyp);
+    return len;
+
+ err:
+    NCONF_free(cnf);
+    ASN1_TYPE_free(atyp);
+    return -1;
+}