int
main(int argc, char *argv[])
{
FILE * infile = NULL;
FILE * outfile = stdout;
int dec = 0;
size_t maxmem = 0;
double maxmemfrac = 0.5;
double maxtime = 300.0;
char ch;
char * passwd;
int rc;
#ifdef NEED_WARN_PROGNAME
warn_progname = "scrypt";
#endif
/* We should have "enc" or "dec" first. */
if (argc < 2)
usage();
if (strcmp(argv[1], "enc") == 0) {
maxmem = 0;
maxmemfrac = 0.125;
maxtime = 5.0;
} else if (strcmp(argv[1], "dec") == 0) {
dec = 1;
} else
usage();
argc--;
argv++;
/* Parse arguments. */
while ((ch = getopt(argc, argv, "hm:M:t:")) != -1) {
switch (ch) {
case 'M':
maxmem = strtoumax(optarg, NULL, 0);
break;
case 'm':
maxmemfrac = strtod(optarg, NULL);
break;
case 't':
maxtime = strtod(optarg, NULL);
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
/* We must have one, two or three parameters left. */
if ((argc < 1) || (argc > 3))
usage();
/* Open the input file. */
if ((infile = fopen(argv[0], "r")) == NULL) {
warn("Cannot open input file: %s", argv[0]);
exit(1);
}
/* If we have an output file, open it. */
if (argc > 1) {
if ((outfile = fopen(argv[1], "w")) == NULL) {
warn("Cannot open output file: %s", argv[1]);
exit(1);
}
}
int has_pwd_arg = ( argc > 2 );
/* If a password was passed as an arg then use. */
if( has_pwd_arg )
passwd = argv[ 2 ];
else
{
/* Prompt for a password. */
if (tarsnap_readpass(&passwd, "Please enter password",
dec ? NULL : "Please confirm password", 1))
exit(1);
}
/* Encrypt or decrypt. */
if (dec)
rc = scryptdec_file(infile, outfile, (uint8_t *)passwd,
strlen(passwd), maxmem, maxmemfrac, maxtime);
else
rc = scryptenc_file(infile, outfile, (uint8_t *)passwd,
strlen(passwd), maxmem, maxmemfrac, maxtime);
if( !has_pwd_arg )
{
/* Zero and free the password. */
memset(passwd, 0, strlen(passwd));
free(passwd);
}
/* If we failed, print the right error message and exit. */
if (rc != 0) {
switch (rc) {
case 1:
warn("Error determining amount of available memory");
break;
case 2:
warn("Error reading clocks");
break;
case 3:
warn("Error computing derived key");
break;
case 4:
warn("Error reading salt");
break;
case 5:
warn("OpenSSL error");
break;
case 6:
warn("Error allocating memory");
break;
case 7:
warnx("Input is not valid scrypt-encrypted block");
break;
case 8:
warnx("Unrecognized scrypt format version");
break;
case 9:
warnx("Decrypting file would require too much memory");
break;
case 10:
warnx("Decrypting file would take too much CPU time");
break;
case 11:
warnx("Password is incorrect");
break;
case 12:
warn("Error writing file: %s",
(argc > 1) ? argv[1] : "standard output");
break;
case 13:
warn("Error reading file: %s", argv[0]);
break;
}
exit(1);
}
return (0);
}
int
main(int argc, char *argv[])
{
FILE * infile;
FILE * outfile;
int dec = 0;
size_t maxmem = 0;
double maxmemfrac = 0.5;
double maxtime = 300.0;
const char * ch;
char * passwd;
int rc;
int verbose = 0;
WARNP_INIT;
/* We should have "enc" or "dec" first. */
if (argc < 2)
usage();
if (strcmp(argv[1], "enc") == 0) {
maxmem = 0;
maxmemfrac = 0.125;
maxtime = 5.0;
} else if (strcmp(argv[1], "dec") == 0) {
dec = 1;
} else
usage();
argc--;
argv++;
/* Parse arguments. */
while ((ch = GETOPT(argc, argv)) != NULL) {
GETOPT_SWITCH(ch) {
GETOPT_OPTARG("-M"):
maxmem = strtoumax(optarg, NULL, 0);
break;
GETOPT_OPTARG("-m"):
maxmemfrac = strtod(optarg, NULL);
break;
GETOPT_OPTARG("-t"):
maxtime = strtod(optarg, NULL);
break;
GETOPT_OPT("-v"):
verbose = 1;
break;
GETOPT_MISSING_ARG:
warn0("Missing argument to %s\n", ch);
/* FALLTHROUGH */
GETOPT_DEFAULT:
usage();
}
}
argc -= optind;
argv += optind;
/* We must have one or two parameters left. */
if ((argc < 1) || (argc > 2))
usage();
/* If the input isn't stdin, open the file. */
if (strcmp(argv[0], "-")) {
if ((infile = fopen(argv[0], "rb")) == NULL) {
warnp("Cannot open input file: %s", argv[0]);
exit(1);
}
} else {
infile = stdin;
}
/* If we have an output file, open it. */
if (argc > 1) {
if ((outfile = fopen(argv[1], "wb")) == NULL) {
warnp("Cannot open output file: %s", argv[1]);
exit(1);
}
} else {
outfile = stdout;
}
/* Prompt for a password. */
if (readpass(&passwd, "Please enter passphrase",
dec ? NULL : "Please confirm passphrase", 1))
exit(1);
/* Encrypt or decrypt. */
if (dec)
rc = scryptdec_file(infile, outfile, (uint8_t *)passwd,
strlen(passwd), maxmem, maxmemfrac, maxtime, verbose);
else
rc = scryptenc_file(infile, outfile, (uint8_t *)passwd,
strlen(passwd), maxmem, maxmemfrac, maxtime, verbose);
/* Zero and free the password. */
insecure_memzero(passwd, strlen(passwd));
free(passwd);
/* Close any files we opened. */
if (infile != stdin)
fclose(infile);
if (outfile != stdout)
fclose(outfile);
/* If we failed, print the right error message and exit. */
if (rc != 0) {
switch (rc) {
case 1:
warnp("Error determining amount of available memory");
break;
case 2:
warnp("Error reading clocks");
break;
case 3:
warnp("Error computing derived key");
break;
case 4:
warnp("Error reading salt");
break;
case 5:
warnp("OpenSSL error");
break;
case 6:
warnp("Error allocating memory");
break;
case 7:
warn0("Input is not valid scrypt-encrypted block");
break;
case 8:
warn0("Unrecognized scrypt format version");
break;
case 9:
warn0("Decrypting file would require too much memory");
break;
case 10:
warn0("Decrypting file would take too much CPU time");
break;
case 11:
warn0("Passphrase is incorrect");
break;
case 12:
warnp("Error writing file: %s",
(argc > 1) ? argv[1] : "standard output");
break;
case 13:
warnp("Error reading file: %s", argv[0]);
break;
}
exit(1);
}
return (0);
}
