text: /*
   * Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
   *
   * 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 <openssl/objects.h>
  #include "obj_xref.h"
  #include "internal/nelem.h"
  #include <openssl/err.h>
  
  static STACK_OF(nid_triple) *sig_app, *sigx_app;
  
  static int sig_cmp(const nid_triple *a, const nid_triple *b)
  {
      return a->sign_id - b->sign_id;
  }
  
  DECLARE_OBJ_BSEARCH_CMP_FN(nid_triple, nid_triple, sig);
  IMPLEMENT_OBJ_BSEARCH_CMP_FN(nid_triple, nid_triple, sig);
  
  static int sig_sk_cmp(const nid_triple *const *a, const nid_triple *const *b)
  {
      return (*a)->sign_id - (*b)->sign_id;
  }
  
  DECLARE_OBJ_BSEARCH_CMP_FN(const nid_triple *, const nid_triple *, sigx);
  
  static int sigx_cmp(const nid_triple *const *a, const nid_triple *const *b)
  {
      int ret;
      ret = (*a)->hash_id - (*b)->hash_id;
      if (ret)
          return ret;
      return (*a)->pkey_id - (*b)->pkey_id;
  }
  
  IMPLEMENT_OBJ_BSEARCH_CMP_FN(const nid_triple *, const nid_triple *, sigx);
  
  int OBJ_find_sigid_algs(int signid, int *pdig_nid, int *ppkey_nid)
  {
      nid_triple tmp;
      const nid_triple *rv = NULL;
      tmp.sign_id = signid;
  
      if (sig_app != NULL) {
          int idx = sk_nid_triple_find(sig_app, &tmp);
          rv = sk_nid_triple_value(sig_app, idx);
      }
  #ifndef OBJ_XREF_TEST2
      if (rv == NULL) {
          rv = OBJ_bsearch_sig(&tmp, sigoid_srt, OSSL_NELEM(sigoid_srt));
      }
  #endif
      if (rv == NULL)
          return 0;
      if (pdig_nid)
          *pdig_nid = rv->hash_id;
      if (ppkey_nid)
          *ppkey_nid = rv->pkey_id;
      return 1;
  }
  
  int OBJ_find_sigid_by_algs(int *psignid, int dig_nid, int pkey_nid)
  {
      nid_triple tmp;
      const nid_triple *t = &tmp;
      const nid_triple **rv = NULL;
  
      tmp.hash_id = dig_nid;
      tmp.pkey_id = pkey_nid;
  
      if (sigx_app) {
          int idx = sk_nid_triple_find(sigx_app, &tmp);
          if (idx >= 0) {
              t = sk_nid_triple_value(sigx_app, idx);
              rv = &t;
          }
      }
  #ifndef OBJ_XREF_TEST2
      if (rv == NULL) {
          rv = OBJ_bsearch_sigx(&t, sigoid_srt_xref, OSSL_NELEM(sigoid_srt_xref));
      }
  #endif
      if (rv == NULL)
          return 0;
      if (psignid)
          *psignid = (*rv)->sign_id;
      return 1;
  }
  
  int OBJ_add_sigid(int signid, int dig_id, int pkey_id)
  {
      nid_triple *ntr;
      if (sig_app == NULL)
          sig_app = sk_nid_triple_new(sig_sk_cmp);
      if (sig_app == NULL)
          return 0;
      if (sigx_app == NULL)
          sigx_app = sk_nid_triple_new(sigx_cmp);
      if (sigx_app == NULL)
          return 0;
      if ((ntr = OPENSSL_malloc(sizeof(*ntr))) == NULL) {
          ERR_raise(ERR_LIB_OBJ, ERR_R_MALLOC_FAILURE);
          return 0;
      }
      ntr->sign_id = signid;
      ntr->hash_id = dig_id;
      ntr->pkey_id = pkey_id;
  
      if (!sk_nid_triple_push(sig_app, ntr)) {
          OPENSSL_free(ntr);
          return 0;
      }
  
      if (!sk_nid_triple_push(sigx_app, ntr))
          return 0;
  
      sk_nid_triple_sort(sig_app);
      sk_nid_triple_sort(sigx_app);
  
      return 1;
  }
  
  static void sid_free(nid_triple *tt)
  {
      OPENSSL_free(tt);
  }
  
  void OBJ_sigid_free(void)
  {
      sk_nid_triple_pop_free(sig_app, sid_free);
      sig_app = NULL;
      sk_nid_triple_free(sigx_app);
      sigx_app = NULL;
  }
  