text: /* tasn_prn.c */
  /*
   * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   * 2000.
   */
  /* ====================================================================
   * Copyright (c) 2000,2005 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 <stddef.h>
  #include "cryptlib.h"
  #include <openssl/asn1.h>
  #include <openssl/asn1t.h>
  #include <openssl/objects.h>
  #include <openssl/buffer.h>
  #include <openssl/err.h>
  #include <openssl/x509v3.h>
  #include "asn1_locl.h"
  
  /*
   * Print routines.
   */
  
  /* ASN1_PCTX routines */
  
  ASN1_PCTX default_pctx = {
      ASN1_PCTX_FLAGS_SHOW_ABSENT, /* flags */
      0,                          /* nm_flags */
      0,                          /* cert_flags */
      0,                          /* oid_flags */
      0                           /* str_flags */
  };
  
  ASN1_PCTX *ASN1_PCTX_new(void)
  {
      ASN1_PCTX *ret;
      ret = OPENSSL_malloc(sizeof(ASN1_PCTX));
      if (ret == NULL) {
          ASN1err(ASN1_F_ASN1_PCTX_NEW, ERR_R_MALLOC_FAILURE);
          return NULL;
      }
      ret->flags = 0;
      ret->nm_flags = 0;
      ret->cert_flags = 0;
      ret->oid_flags = 0;
      ret->str_flags = 0;
      return ret;
  }
  
  void ASN1_PCTX_free(ASN1_PCTX *p)
  {
      OPENSSL_free(p);
  }
  
  unsigned long ASN1_PCTX_get_flags(ASN1_PCTX *p)
  {
      return p->flags;
  }
  
  void ASN1_PCTX_set_flags(ASN1_PCTX *p, unsigned long flags)
  {
      p->flags = flags;
  }
  
  unsigned long ASN1_PCTX_get_nm_flags(ASN1_PCTX *p)
  {
      return p->nm_flags;
  }
  
  void ASN1_PCTX_set_nm_flags(ASN1_PCTX *p, unsigned long flags)
  {
      p->nm_flags = flags;
  }
  
  unsigned long ASN1_PCTX_get_cert_flags(ASN1_PCTX *p)
  {
      return p->cert_flags;
  }
  
  void ASN1_PCTX_set_cert_flags(ASN1_PCTX *p, unsigned long flags)
  {
      p->cert_flags = flags;
  }
  
  unsigned long ASN1_PCTX_get_oid_flags(ASN1_PCTX *p)
  {
      return p->oid_flags;
  }
  
  void ASN1_PCTX_set_oid_flags(ASN1_PCTX *p, unsigned long flags)
  {
      p->oid_flags = flags;
  }
  
  unsigned long ASN1_PCTX_get_str_flags(ASN1_PCTX *p)
  {
      return p->str_flags;
  }
  
  void ASN1_PCTX_set_str_flags(ASN1_PCTX *p, unsigned long flags)
  {
      p->str_flags = flags;
  }
  
  /* Main print routines */
  
  static int asn1_item_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
                                 const ASN1_ITEM *it,
                                 const char *fname, const char *sname,
                                 int nohdr, const ASN1_PCTX *pctx);
  
  int asn1_template_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
                              const ASN1_TEMPLATE *tt, const ASN1_PCTX *pctx);
  
  static int asn1_primitive_print(BIO *out, ASN1_VALUE **fld,
                                  const ASN1_ITEM *it, int indent,
                                  const char *fname, const char *sname,
                                  const ASN1_PCTX *pctx);
  
  static int asn1_print_fsname(BIO *out, int indent,
                               const char *fname, const char *sname,
                               const ASN1_PCTX *pctx);
  
  int ASN1_item_print(BIO *out, ASN1_VALUE *ifld, int indent,
                      const ASN1_ITEM *it, const ASN1_PCTX *pctx)
  {
      const char *sname;
      if (pctx == NULL)
          pctx = &default_pctx;
      if (pctx->flags & ASN1_PCTX_FLAGS_NO_STRUCT_NAME)
          sname = NULL;
      else
          sname = it->sname;
      return asn1_item_print_ctx(out, &ifld, indent, it, NULL, sname, 0, pctx);
  }
  
  static int asn1_item_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
                                 const ASN1_ITEM *it,
                                 const char *fname, const char *sname,
                                 int nohdr, const ASN1_PCTX *pctx)
  {
      const ASN1_TEMPLATE *tt;
      const ASN1_EXTERN_FUNCS *ef;
      ASN1_VALUE **tmpfld;
      const ASN1_AUX *aux = it->funcs;
      ASN1_aux_cb *asn1_cb;
      ASN1_PRINT_ARG parg;
      int i;
      if (aux && aux->asn1_cb) {
          parg.out = out;
          parg.indent = indent;
          parg.pctx = pctx;
          asn1_cb = aux->asn1_cb;
      } else
          asn1_cb = 0;
  
      if (*fld == NULL) {
          if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_ABSENT) {
              if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
                  return 0;
              if (BIO_puts(out, "<ABSENT>\n") <= 0)
                  return 0;
          }
          return 1;
      }
  
      switch (it->itype) {
      case ASN1_ITYPE_PRIMITIVE:
          if (it->templates) {
              if (!asn1_template_print_ctx(out, fld, indent,
                                           it->templates, pctx))
                  return 0;
              break;
          }
          /* fall thru */
      case ASN1_ITYPE_MSTRING:
          if (!asn1_primitive_print(out, fld, it, indent, fname, sname, pctx))
              return 0;
          break;
  
      case ASN1_ITYPE_EXTERN:
          if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
              return 0;
          /* Use new style print routine if possible */
          ef = it->funcs;
          if (ef && ef->asn1_ex_print) {
              i = ef->asn1_ex_print(out, fld, indent, "", pctx);
              if (!i)
                  return 0;
              if ((i == 2) && (BIO_puts(out, "\n") <= 0))
                  return 0;
              return 1;
          } else if (sname &&
                     BIO_printf(out, ":EXTERNAL TYPE %s\n", sname) <= 0)
              return 0;
          break;
  
      case ASN1_ITYPE_CHOICE:
  #if 0
          if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
              return 0;
  #endif
          /* CHOICE type, get selector */
          i = asn1_get_choice_selector(fld, it);
          /* This should never happen... */
          if ((i < 0) || (i >= it->tcount)) {
              if (BIO_printf(out, "ERROR: selector [%d] invalid\n", i) <= 0)
                  return 0;
              return 1;
          }
          tt = it->templates + i;
          tmpfld = asn1_get_field_ptr(fld, tt);
          if (!asn1_template_print_ctx(out, tmpfld, indent, tt, pctx))
              return 0;
          break;
  
      case ASN1_ITYPE_SEQUENCE:
      case ASN1_ITYPE_NDEF_SEQUENCE:
          if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
              return 0;
          if (fname || sname) {
              if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE) {
                  if (BIO_puts(out, " {\n") <= 0)
                      return 0;
              } else {
                  if (BIO_puts(out, "\n") <= 0)
                      return 0;
              }
          }
  
          if (asn1_cb) {
              i = asn1_cb(ASN1_OP_PRINT_PRE, fld, it, &parg);
              if (i == 0)
                  return 0;
              if (i == 2)
                  return 1;
          }
  
          /* Print each field entry */
          for (i = 0, tt = it->templates; i < it->tcount; i++, tt++) {
              const ASN1_TEMPLATE *seqtt;
              seqtt = asn1_do_adb(fld, tt, 1);
              tmpfld = asn1_get_field_ptr(fld, seqtt);
              if (!asn1_template_print_ctx(out, tmpfld,
                                           indent + 2, seqtt, pctx))
                  return 0;
          }
          if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE) {
              if (BIO_printf(out, "%*s}\n", indent, "") < 0)
                  return 0;
          }
  
          if (asn1_cb) {
              i = asn1_cb(ASN1_OP_PRINT_POST, fld, it, &parg);
              if (i == 0)
                  return 0;
          }
          break;
  
      default:
          BIO_printf(out, "Unprocessed type %d\n", it->itype);
          return 0;
      }
  
      return 1;
  }
  
  int asn1_template_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
                              const ASN1_TEMPLATE *tt, const ASN1_PCTX *pctx)
  {
      int i, flags;
      const char *sname, *fname;
      flags = tt->flags;
      if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_FIELD_STRUCT_NAME)
          sname = ASN1_ITEM_ptr(tt->item)->sname;
      else
          sname = NULL;
      if (pctx->flags & ASN1_PCTX_FLAGS_NO_FIELD_NAME)
          fname = NULL;
      else
          fname = tt->field_name;
      if (flags & ASN1_TFLG_SK_MASK) {
          char *tname;
          ASN1_VALUE *skitem;
          STACK_OF(ASN1_VALUE) *stack;
  
          /* SET OF, SEQUENCE OF */
          if (fname) {
              if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SSOF) {
                  if (flags & ASN1_TFLG_SET_OF)
                      tname = "SET";
                  else
                      tname = "SEQUENCE";
                  if (BIO_printf(out, "%*s%s OF %s {\n",
                                 indent, "", tname, tt->field_name) <= 0)
                      return 0;
              } else if (BIO_printf(out, "%*s%s:\n", indent, "", fname) <= 0)
                  return 0;
          }
          stack = (STACK_OF(ASN1_VALUE) *)*fld;
          for (i = 0; i < sk_ASN1_VALUE_num(stack); i++) {
              if ((i > 0) && (BIO_puts(out, "\n") <= 0))
                  return 0;
  
              skitem = sk_ASN1_VALUE_value(stack, i);
              if (!asn1_item_print_ctx(out, &skitem, indent + 2,
                                       ASN1_ITEM_ptr(tt->item), NULL, NULL, 1,
                                       pctx))
                  return 0;
          }
          if (!i && BIO_printf(out, "%*s<EMPTY>\n", indent + 2, "") <= 0)
              return 0;
          if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE) {
              if (BIO_printf(out, "%*s}\n", indent, "") <= 0)
                  return 0;
          }
          return 1;
      }
      return asn1_item_print_ctx(out, fld, indent, ASN1_ITEM_ptr(tt->item),
                                 fname, sname, 0, pctx);
  }
  
  static int asn1_print_fsname(BIO *out, int indent,
                               const char *fname, const char *sname,
                               const ASN1_PCTX *pctx)
  {
      static char spaces[] = "                    ";
      const int nspaces = sizeof(spaces) - 1;
  
  #if 0
      if (!sname && !fname)
          return 1;
  #endif
  
      while (indent > nspaces) {
          if (BIO_write(out, spaces, nspaces) != nspaces)
              return 0;
          indent -= nspaces;
      }
      if (BIO_write(out, spaces, indent) != indent)
          return 0;
      if (pctx->flags & ASN1_PCTX_FLAGS_NO_STRUCT_NAME)
          sname = NULL;
      if (pctx->flags & ASN1_PCTX_FLAGS_NO_FIELD_NAME)
          fname = NULL;
      if (!sname && !fname)
          return 1;
      if (fname) {
          if (BIO_puts(out, fname) <= 0)
              return 0;
      }
      if (sname) {
          if (fname) {
              if (BIO_printf(out, " (%s)", sname) <= 0)
                  return 0;
          } else {
              if (BIO_puts(out, sname) <= 0)
                  return 0;
          }
      }
      if (BIO_write(out, ": ", 2) != 2)
          return 0;
      return 1;
  }
  
  static int asn1_print_boolean_ctx(BIO *out, int boolval,
                                    const ASN1_PCTX *pctx)
  {
      const char *str;
      switch (boolval) {
      case -1:
          str = "BOOL ABSENT";
          break;
  
      case 0:
          str = "FALSE";
          break;
  
      default:
          str = "TRUE";
          break;
  
      }
  
      if (BIO_puts(out, str) <= 0)
          return 0;
      return 1;
  
  }
  
  static int asn1_print_integer_ctx(BIO *out, ASN1_INTEGER *str,
                                    const ASN1_PCTX *pctx)
  {
      char *s;
      int ret = 1;
      s = i2s_ASN1_INTEGER(NULL, str);
      if (BIO_puts(out, s) <= 0)
          ret = 0;
      OPENSSL_free(s);
      return ret;
  }
  
  static int asn1_print_oid_ctx(BIO *out, const ASN1_OBJECT *oid,
                                const ASN1_PCTX *pctx)
  {
      char objbuf[80];
      const char *ln;
      ln = OBJ_nid2ln(OBJ_obj2nid(oid));
      if (!ln)
          ln = "";
      OBJ_obj2txt(objbuf, sizeof objbuf, oid, 1);
      if (BIO_printf(out, "%s (%s)", ln, objbuf) <= 0)
          return 0;
      return 1;
  }
  
  static int asn1_print_obstring_ctx(BIO *out, ASN1_STRING *str, int indent,
                                     const ASN1_PCTX *pctx)
  {
      if (str->type == V_ASN1_BIT_STRING) {
          if (BIO_printf(out, " (%ld unused bits)\n", str->flags & 0x7) <= 0)
              return 0;
      } else if (BIO_puts(out, "\n") <= 0)
          return 0;
      if ((str->length > 0)
          && BIO_dump_indent(out, (char *)str->data, str->length,
                             indent + 2) <= 0)
          return 0;
      return 1;
  }
  
  static int asn1_primitive_print(BIO *out, ASN1_VALUE **fld,
                                  const ASN1_ITEM *it, int indent,
                                  const char *fname, const char *sname,
                                  const ASN1_PCTX *pctx)
  {
      long utype;
      ASN1_STRING *str;
      int ret = 1, needlf = 1;
      const char *pname;
      const ASN1_PRIMITIVE_FUNCS *pf;
      pf = it->funcs;
      if (!asn1_print_fsname(out, indent, fname, sname, pctx))
          return 0;
      if (pf && pf->prim_print)
          return pf->prim_print(out, fld, it, indent, pctx);
      str = (ASN1_STRING *)*fld;
      if (it->itype == ASN1_ITYPE_MSTRING)
          utype = str->type & ~V_ASN1_NEG;
      else
          utype = it->utype;
      if (utype == V_ASN1_ANY) {
          ASN1_TYPE *atype = (ASN1_TYPE *)*fld;
          utype = atype->type;
          fld = &atype->value.asn1_value;
          str = (ASN1_STRING *)*fld;
          if (pctx->flags & ASN1_PCTX_FLAGS_NO_ANY_TYPE)
              pname = NULL;
          else
              pname = ASN1_tag2str(utype);
      } else {
          if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_TYPE)
              pname = ASN1_tag2str(utype);
          else
              pname = NULL;
      }
  
      if (utype == V_ASN1_NULL) {
          if (BIO_puts(out, "NULL\n") <= 0)
              return 0;
          return 1;
      }
  
      if (pname) {
          if (BIO_puts(out, pname) <= 0)
              return 0;
          if (BIO_puts(out, ":") <= 0)
              return 0;
      }
  
      switch (utype) {
      case V_ASN1_BOOLEAN:
          {
              int boolval = *(int *)fld;
              if (boolval == -1)
                  boolval = it->size;
              ret = asn1_print_boolean_ctx(out, boolval, pctx);
          }
          break;
  
      case V_ASN1_INTEGER:
      case V_ASN1_ENUMERATED:
          ret = asn1_print_integer_ctx(out, str, pctx);
          break;
  
      case V_ASN1_UTCTIME:
          ret = ASN1_UTCTIME_print(out, str);
          break;
  
      case V_ASN1_GENERALIZEDTIME:
          ret = ASN1_GENERALIZEDTIME_print(out, str);
          break;
  
      case V_ASN1_OBJECT:
          ret = asn1_print_oid_ctx(out, (const ASN1_OBJECT *)*fld, pctx);
          break;
  
      case V_ASN1_OCTET_STRING:
      case V_ASN1_BIT_STRING:
          ret = asn1_print_obstring_ctx(out, str, indent, pctx);
          needlf = 0;
          break;
  
      case V_ASN1_SEQUENCE:
      case V_ASN1_SET:
      case V_ASN1_OTHER:
          if (BIO_puts(out, "\n") <= 0)
              return 0;
          if (ASN1_parse_dump(out, str->data, str->length, indent, 0) <= 0)
              ret = 0;
          needlf = 0;
          break;
  
      default:
          ret = ASN1_STRING_print_ex(out, str, pctx->str_flags);
  
      }
      if (!ret)
          return 0;
      if (needlf && BIO_puts(out, "\n") <= 0)
          return 0;
      return 1;
  }
  