#include <stddef.h>

#include <stdio.h>

#include <stdint.h>

#include <string.h>

#include <stdlib.h>

#include <pwd.h>

#include <unistd.h>

extern "C" {

#include "hostfile.h"

#include "auth.h"

#include "auth-options.h"

#include "sshkey.h"

// testdata/id_ed25519.pub and testdata/id_ed25519-cert.pub

const char *pubkey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDPQXmEVMVLmeFRyafKMVWgPDkv8/uRBTwmcEDatZzMD"; 

const char *certtext = "ssh-ed25519-cert-v01@openssh.com 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 id_ed25519.pub";

// stubs

void auth_debug_add(const char *fmt,...)

{

}

void

auth_log_authopts(const char *loc, const struct sshauthopt *opts, int do_remote)

{

}

int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)

{

  char *tmp, *o, *cp = (char *)malloc(size + 1 + strlen(pubkey) + 1);

  struct sshauthopt *opts = NULL;

  struct passwd *pw = getpwuid(getuid());

  static struct sshkey *key, *cert;

  if (key == NULL) {

    if ((key = sshkey_new(KEY_UNSPEC)) == NULL ||

        (cert = sshkey_new(KEY_UNSPEC)) == NULL)

      abort();

    if ((o = tmp = strdup(pubkey)) == NULL ||

        sshkey_read(key, &tmp) != 0)

      abort();

    free(o);

    if ((o = tmp = strdup(certtext)) == NULL ||

        sshkey_read(cert, &tmp) != 0)

      abort();

    free(o);

  }

  if (cp == NULL || pw == NULL || key == NULL || cert == NULL)

    abort();

  // Cleanup whitespace at input EOL.

  for (; size > 0 && strchr(" \t\r\n", data[size - 1]) != NULL; size--) ;

  // Append a pubkey that will match.

  memcpy(cp, data, size);

  cp[size] = ' ';

  memcpy(cp + size + 1, pubkey, strlen(pubkey) + 1);

  // Try key.

  if ((tmp = strdup(cp)) == NULL)

    abort();

  (void) auth_check_authkey_line(pw, key, tmp, "127.0.0.1", "localhost",

      "fuzz", &opts);

  free(tmp);

  sshauthopt_free(opts);

  // Try cert.

  if ((tmp = strdup(cp)) == NULL)

    abort();

  (void) auth_check_authkey_line(pw, cert, tmp, "127.0.0.1", "localhost",

      "fuzz", &opts);

  free(tmp);

  sshauthopt_free(opts);

  free(cp);

  return 0;

}

} // extern "C"