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/*
   This file is part of GNUnet
   (C) 2015, 2016, 2019 GNUnet e.V.

   GNUnet is free software: you can redistribute it and/or modify it
   under the terms of the GNU Affero General Public License as published
   by the Free Software Foundation, either version 3 of the License,
   or (at your option) any later version.

   GNUnet is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Affero General Public License for more details.

   You should have received a copy of the GNU Affero General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.

     SPDX-License-Identifier: AGPL3.0-or-later
 */
/**
 * @file pq/test_pq.c
 * @brief Tests for Postgres convenience API
 * @author Christian Grothoff <christian@grothoff.org>
 */
#include "platform.h"
#include "pq.h"


/**
 * Setup prepared statements.
 *
 * @param db database handle to initialize
 * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
 */
static int
postgres_prepare (struct GNUNET_PQ_Context *db)
{
  struct GNUNET_PQ_PreparedStatement ps[] = {
    GNUNET_PQ_make_prepare ("test_insert",
                            "INSERT INTO test_pq ("
                            " pub"
                            ",sig"
                            ",abs_time"
                            ",forever"
                            ",hash"
                            ",vsize"
                            ",u16"
                            ",u32"
                            ",u64"
                            ") VALUES "
                            "($1, $2, $3, $4, $5, $6,"
                            "$7, $8, $9);",
                            9),
    GNUNET_PQ_make_prepare ("test_select",
                            "SELECT"
                            " pub"
                            ",sig"
                            ",abs_time"
                            ",forever"
                            ",hash"
                            ",vsize"
                            ",u16"
                            ",u32"
                            ",u64"
                            " FROM test_pq"
                            " ORDER BY abs_time DESC "
                            " LIMIT 1;",
                            0),
    GNUNET_PQ_PREPARED_STATEMENT_END
  };

  return GNUNET_PQ_prepare_statements (db,
                                       ps);
}


/**
 * Run actual test queries.
 *
 * @param db database handle
 * @return 0 on success
 */
static int
run_queries (struct GNUNET_PQ_Context *db)
{
  struct GNUNET_CRYPTO_RsaPublicKey *pub;
  struct GNUNET_CRYPTO_RsaPublicKey *pub2 = NULL;
  struct GNUNET_CRYPTO_RsaSignature *sig;
  struct GNUNET_CRYPTO_RsaSignature *sig2 = NULL;
  struct GNUNET_TIME_Absolute abs_time = GNUNET_TIME_absolute_get ();
  struct GNUNET_TIME_Absolute abs_time2;
  struct GNUNET_TIME_Absolute forever = GNUNET_TIME_UNIT_FOREVER_ABS;
  struct GNUNET_TIME_Absolute forever2;
  struct GNUNET_HashCode hc;
  struct GNUNET_HashCode hc2;
  PGresult *result;
  int ret;
  struct GNUNET_CRYPTO_RsaPrivateKey *priv;
  const char msg[] = "hello";
  void *msg2;
  struct GNUNET_HashCode hmsg;
  size_t msg2_len;
  uint16_t u16;
  uint16_t u162;
  uint32_t u32;
  uint32_t u322;
  uint64_t u64;
  uint64_t u642;

  priv = GNUNET_CRYPTO_rsa_private_key_create (1024);
  pub = GNUNET_CRYPTO_rsa_private_key_get_public (priv);
  memset (&hmsg, 42, sizeof(hmsg));
  sig = GNUNET_CRYPTO_rsa_sign_fdh (priv,
                                    &hmsg);
  u16 = 16;
  u32 = 32;
  u64 = 64;
  /* FIXME: test GNUNET_PQ_result_spec_variable_size */
  {
    struct GNUNET_PQ_QueryParam params_insert[] = {
      GNUNET_PQ_query_param_rsa_public_key (pub),
      GNUNET_PQ_query_param_rsa_signature (sig),
      GNUNET_PQ_query_param_absolute_time (&abs_time),
      GNUNET_PQ_query_param_absolute_time (&forever),
      GNUNET_PQ_query_param_auto_from_type (&hc),
      GNUNET_PQ_query_param_fixed_size (msg, strlen (msg)),
      GNUNET_PQ_query_param_uint16 (&u16),
      GNUNET_PQ_query_param_uint32 (&u32),
      GNUNET_PQ_query_param_uint64 (&u64),
      GNUNET_PQ_query_param_end
    };
    struct GNUNET_PQ_QueryParam params_select[] = {
      GNUNET_PQ_query_param_end
    };
    struct GNUNET_PQ_ResultSpec results_select[] = {
      GNUNET_PQ_result_spec_rsa_public_key ("pub", &pub2),
      GNUNET_PQ_result_spec_rsa_signature ("sig", &sig2),
      GNUNET_PQ_result_spec_absolute_time ("abs_time", &abs_time2),
      GNUNET_PQ_result_spec_absolute_time ("forever", &forever2),
      GNUNET_PQ_result_spec_auto_from_type ("hash", &hc2),
      GNUNET_PQ_result_spec_variable_size ("vsize", &msg2, &msg2_len),
      GNUNET_PQ_result_spec_uint16 ("u16", &u162),
      GNUNET_PQ_result_spec_uint32 ("u32", &u322),
      GNUNET_PQ_result_spec_uint64 ("u64", &u642),
      GNUNET_PQ_result_spec_end
    };

    result = GNUNET_PQ_exec_prepared (db,
                                      "test_insert",
                                      params_insert);
    if (PGRES_COMMAND_OK != PQresultStatus (result))
    {
      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                  "Database failure: %s\n",
                  PQresultErrorMessage (result));
      PQclear (result);
      GNUNET_CRYPTO_rsa_signature_free (sig);
      GNUNET_CRYPTO_rsa_private_key_free (priv);
      GNUNET_CRYPTO_rsa_public_key_free (pub);
      return 1;
    }

    PQclear (result);
    result = GNUNET_PQ_exec_prepared (db,
                                      "test_select",
                                      params_select);
    if (1 !=
        PQntuples (result))
    {
      GNUNET_break (0);
      PQclear (result);
      GNUNET_CRYPTO_rsa_signature_free (sig);
      GNUNET_CRYPTO_rsa_private_key_free (priv);
      GNUNET_CRYPTO_rsa_public_key_free (pub);
      return 1;
    }
    ret = GNUNET_PQ_extract_result (result,
                                    results_select,
                                    0);
    GNUNET_break (GNUNET_YES == ret);
    GNUNET_break (abs_time.abs_value_us == abs_time2.abs_value_us);
    GNUNET_break (forever.abs_value_us == forever2.abs_value_us);
    GNUNET_break (0 ==
                  GNUNET_memcmp (&hc,
                                 &hc2));
    GNUNET_break (0 ==
                  GNUNET_CRYPTO_rsa_signature_cmp (sig,
                                                   sig2));
    GNUNET_break (0 ==
                  GNUNET_CRYPTO_rsa_public_key_cmp (pub,
                                                    pub2));
    GNUNET_break (strlen (msg) == msg2_len);
    GNUNET_break (0 ==
                  strncmp (msg,
                           msg2,
                           msg2_len));
    GNUNET_break (16 == u162);
    GNUNET_break (32 == u322);
    GNUNET_break (64 == u642);
    GNUNET_PQ_cleanup_result (results_select);
    PQclear (result);
  }
  GNUNET_CRYPTO_rsa_signature_free (sig);
  GNUNET_CRYPTO_rsa_private_key_free (priv);
  GNUNET_CRYPTO_rsa_public_key_free (pub);
  if (GNUNET_OK != ret)
    return 1;

  return 0;
}


int
main (int argc,
      const char *const argv[])
{
  struct GNUNET_PQ_ExecuteStatement es[] = {
    GNUNET_PQ_make_execute ("CREATE TEMPORARY TABLE IF NOT EXISTS test_pq ("
                            " pub BYTEA NOT NULL"
                            ",sig BYTEA NOT NULL"
                            ",abs_time INT8 NOT NULL"
                            ",forever INT8 NOT NULL"
                            ",hash BYTEA NOT NULL CHECK(LENGTH(hash)=64)"
                            ",vsize VARCHAR NOT NULL"
                            ",u16 INT2 NOT NULL"
                            ",u32 INT4 NOT NULL"
                            ",u64 INT8 NOT NULL"
                            ")"),
    GNUNET_PQ_EXECUTE_STATEMENT_END
  };
  struct GNUNET_PQ_Context *db;
  int ret;

  GNUNET_log_setup ("test-pq",
                    "WARNING",
                    NULL);
  db = GNUNET_PQ_connect ("postgres:///gnunetcheck",
                          es,
                          NULL);
  if (CONNECTION_OK != PQstatus (db->conn))
  {
    fprintf (stderr,
             "Cannot run test, database connection failed: %s\n",
             PQerrorMessage (db->conn));
    GNUNET_break (0);
    GNUNET_PQ_disconnect (db);
    return 77;   /* signal test was skipped */
  }
  if (GNUNET_OK !=
      postgres_prepare (db))
  {
    GNUNET_break (0);
    GNUNET_PQ_disconnect (db);
    return 1;
  }
  ret = run_queries (db);
#if TEST_RESTART
  fprintf (stderr, "Please restart Postgres database now!\n");
  sleep (60);
  ret = run_queries (db);
  fprintf (stderr, "Result: %d (expect: 1 -- if you restarted the DB)\n", ret);
  ret = run_queries (db);
  fprintf (stderr, "Result: %d (expect: 0)\n", ret);
#endif
  {
    struct GNUNET_PQ_ExecuteStatement es[] = {
      GNUNET_PQ_make_execute ("DROP TABLE test_pq"),
      GNUNET_PQ_EXECUTE_STATEMENT_END
    };

    if (GNUNET_OK !=
        GNUNET_PQ_exec_statements (db,
                                   es))
    {
      fprintf (stderr,
               "Failed to drop table\n");
      GNUNET_PQ_disconnect (db);
      return 1;
    }
  }
  GNUNET_PQ_disconnect (db);
  return ret;
}


/* end of test_pq.c */