text: /* crypto/x509/x509_req.c */
  /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   * 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.] */
  
  #include <CCryptoBoringSSL_asn1.h>
  #include <CCryptoBoringSSL_asn1t.h>
  #include <CCryptoBoringSSL_bn.h>
  #include <CCryptoBoringSSL_err.h>
  #include <CCryptoBoringSSL_evp.h>
  #include <CCryptoBoringSSL_mem.h>
  #include <CCryptoBoringSSL_obj.h>
  #include <CCryptoBoringSSL_pem.h>
  #include <CCryptoBoringSSL_x509.h>
  
  X509_REQ *X509_to_X509_REQ(X509 *x, EVP_PKEY *pkey, const EVP_MD *md)
  {
      X509_REQ *ret;
      X509_REQ_INFO *ri;
      int i;
      EVP_PKEY *pktmp;
  
      ret = X509_REQ_new();
      if (ret == NULL) {
          OPENSSL_PUT_ERROR(X509, ERR_R_MALLOC_FAILURE);
          goto err;
      }
  
      ri = ret->req_info;
  
      ri->version->length = 1;
      ri->version->data = (unsigned char *)OPENSSL_malloc(1);
      if (ri->version->data == NULL)
          goto err;
      ri->version->data[0] = 0;   /* version == 0 */
  
      if (!X509_REQ_set_subject_name(ret, X509_get_subject_name(x)))
          goto err;
  
      pktmp = X509_get_pubkey(x);
      if (pktmp == NULL)
          goto err;
      i = X509_REQ_set_pubkey(ret, pktmp);
      EVP_PKEY_free(pktmp);
      if (!i)
          goto err;
  
      if (pkey != NULL) {
          if (!X509_REQ_sign(ret, pkey, md))
              goto err;
      }
      return (ret);
   err:
      X509_REQ_free(ret);
      return (NULL);
  }
  
  long X509_REQ_get_version(const X509_REQ *req)
  {
      return ASN1_INTEGER_get(req->req_info->version);
  }
  
  X509_NAME *X509_REQ_get_subject_name(const X509_REQ *req)
  {
      return req->req_info->subject;
  }
  
  EVP_PKEY *X509_REQ_get_pubkey(X509_REQ *req)
  {
      if ((req == NULL) || (req->req_info == NULL))
          return (NULL);
      return (X509_PUBKEY_get(req->req_info->pubkey));
  }
  
  int X509_REQ_check_private_key(X509_REQ *x, EVP_PKEY *k)
  {
      EVP_PKEY *xk = NULL;
      int ok = 0;
  
      xk = X509_REQ_get_pubkey(x);
      switch (EVP_PKEY_cmp(xk, k)) {
      case 1:
          ok = 1;
          break;
      case 0:
          OPENSSL_PUT_ERROR(X509, X509_R_KEY_VALUES_MISMATCH);
          break;
      case -1:
          OPENSSL_PUT_ERROR(X509, X509_R_KEY_TYPE_MISMATCH);
          break;
      case -2:
          if (k->type == EVP_PKEY_EC) {
              OPENSSL_PUT_ERROR(X509, ERR_R_EC_LIB);
              break;
          }
          if (k->type == EVP_PKEY_DH) {
              /* No idea */
              OPENSSL_PUT_ERROR(X509, X509_R_CANT_CHECK_DH_KEY);
              break;
          }
          OPENSSL_PUT_ERROR(X509, X509_R_UNKNOWN_KEY_TYPE);
      }
  
      EVP_PKEY_free(xk);
      return (ok);
  }
  
  /*
   * It seems several organisations had the same idea of including a list of
   * extensions in a certificate request. There are at least two OIDs that are
   * used and there may be more: so the list is configurable.
   */
  
  static const int ext_nid_list[] = { NID_ext_req, NID_ms_ext_req, NID_undef };
  
  static const int *ext_nids = ext_nid_list;
  
  int X509_REQ_extension_nid(int req_nid)
  {
      int i, nid;
      for (i = 0;; i++) {
          nid = ext_nids[i];
          if (nid == NID_undef)
              return 0;
          else if (req_nid == nid)
              return 1;
      }
  }
  
  const int *X509_REQ_get_extension_nids(void)
  {
      return ext_nids;
  }
  
  void X509_REQ_set_extension_nids(const int *nids)
  {
      ext_nids = nids;
  }
  
  STACK_OF(X509_EXTENSION) *X509_REQ_get_extensions(X509_REQ *req)
  {
      X509_ATTRIBUTE *attr;
      ASN1_TYPE *ext = NULL;
      int idx;
      const int *pnid;
      const unsigned char *p;
  
      if ((req == NULL) || (req->req_info == NULL) || !ext_nids)
          return (NULL);
      for (pnid = ext_nids; *pnid != NID_undef; pnid++) {
          idx = X509_REQ_get_attr_by_NID(req, *pnid, -1);
          if (idx == -1)
              continue;
          attr = X509_REQ_get_attr(req, idx);
          if (attr->single)
              ext = attr->value.single;
          else if (sk_ASN1_TYPE_num(attr->value.set))
              ext = sk_ASN1_TYPE_value(attr->value.set, 0);
          break;
      }
      if (!ext || (ext->type != V_ASN1_SEQUENCE))
          return NULL;
      p = ext->value.sequence->data;
      return (STACK_OF(X509_EXTENSION) *)
          ASN1_item_d2i(NULL, &p, ext->value.sequence->length,
                        ASN1_ITEM_rptr(X509_EXTENSIONS));
  }
  
  /*
   * Add a STACK_OF extensions to a certificate request: allow alternative OIDs
   * in case we want to create a non standard one.
   */
  
  int X509_REQ_add_extensions_nid(X509_REQ *req, STACK_OF(X509_EXTENSION) *exts,
                                  int nid)
  {
      ASN1_TYPE *at = NULL;
      X509_ATTRIBUTE *attr = NULL;
      if (!(at = ASN1_TYPE_new()) || !(at->value.sequence = ASN1_STRING_new()))
          goto err;
  
      at->type = V_ASN1_SEQUENCE;
      /* Generate encoding of extensions */
      at->value.sequence->length =
          ASN1_item_i2d((ASN1_VALUE *)exts,
                        &at->value.sequence->data,
                        ASN1_ITEM_rptr(X509_EXTENSIONS));
      if (!(attr = X509_ATTRIBUTE_new()))
          goto err;
      if (!(attr->value.set = sk_ASN1_TYPE_new_null()))
          goto err;
      if (!sk_ASN1_TYPE_push(attr->value.set, at))
          goto err;
      at = NULL;
      attr->single = 0;
      attr->object = (ASN1_OBJECT *)OBJ_nid2obj(nid);
      if (!req->req_info->attributes) {
          if (!(req->req_info->attributes = sk_X509_ATTRIBUTE_new_null()))
              goto err;
      }
      if (!sk_X509_ATTRIBUTE_push(req->req_info->attributes, attr))
          goto err;
      return 1;
   err:
      X509_ATTRIBUTE_free(attr);
      ASN1_TYPE_free(at);
      return 0;
  }
  
  /* This is the normal usage: use the "official" OID */
  int X509_REQ_add_extensions(X509_REQ *req, STACK_OF(X509_EXTENSION) *exts)
  {
      return X509_REQ_add_extensions_nid(req, exts, NID_ext_req);
  }
  
  /* Request attribute functions */
  
  int X509_REQ_get_attr_count(const X509_REQ *req)
  {
      return X509at_get_attr_count(req->req_info->attributes);
  }
  
  int X509_REQ_get_attr_by_NID(const X509_REQ *req, int nid, int lastpos)
  {
      return X509at_get_attr_by_NID(req->req_info->attributes, nid, lastpos);
  }
  
  int X509_REQ_get_attr_by_OBJ(const X509_REQ *req, ASN1_OBJECT *obj,
                               int lastpos)
  {
      return X509at_get_attr_by_OBJ(req->req_info->attributes, obj, lastpos);
  }
  
  X509_ATTRIBUTE *X509_REQ_get_attr(const X509_REQ *req, int loc)
  {
      return X509at_get_attr(req->req_info->attributes, loc);
  }
  
  X509_ATTRIBUTE *X509_REQ_delete_attr(X509_REQ *req, int loc)
  {
      return X509at_delete_attr(req->req_info->attributes, loc);
  }
  
  int X509_REQ_add1_attr(X509_REQ *req, X509_ATTRIBUTE *attr)
  {
      if (X509at_add1_attr(&req->req_info->attributes, attr))
          return 1;
      return 0;
  }
  
  int X509_REQ_add1_attr_by_OBJ(X509_REQ *req,
                                const ASN1_OBJECT *obj, int type,
                                const unsigned char *bytes, int len)
  {
      if (X509at_add1_attr_by_OBJ(&req->req_info->attributes, obj,
                                  type, bytes, len))
          return 1;
      return 0;
  }
  
  int X509_REQ_add1_attr_by_NID(X509_REQ *req,
                                int nid, int type,
                                const unsigned char *bytes, int len)
  {
      if (X509at_add1_attr_by_NID(&req->req_info->attributes, nid,
                                  type, bytes, len))
          return 1;
      return 0;
  }
  
  int X509_REQ_add1_attr_by_txt(X509_REQ *req,
                                const char *attrname, int type,
                                const unsigned char *bytes, int len)
  {
      if (X509at_add1_attr_by_txt(&req->req_info->attributes, attrname,
                                  type, bytes, len))
          return 1;
      return 0;
  }
  
  void X509_REQ_get0_signature(const X509_REQ *req, const ASN1_BIT_STRING **psig,
                               const X509_ALGOR **palg)
  {
      if (psig != NULL)
          *psig = req->signature;
      if (palg != NULL)
          *palg = req->sig_alg;
  }
  
  int X509_REQ_get_signature_nid(const X509_REQ *req)
  {
      return OBJ_obj2nid(req->sig_alg->algorithm);
  }
  
  int i2d_re_X509_REQ_tbs(X509_REQ *req, unsigned char **pp)
  {
      req->req_info->enc.modified = 1;
      return i2d_X509_REQ_INFO(req->req_info, pp);
  }
  