diff options
Diffstat (limited to 'manual/examples/testpass.c')
| -rw-r--r-- | manual/examples/testpass.c | 52 |
1 files changed, 38 insertions, 14 deletions
diff --git a/manual/examples/testpass.c b/manual/examples/testpass.c index 19f1ae7de0..f8883fea17 100644 --- a/manual/examples/testpass.c +++ b/manual/examples/testpass.c @@ -1,4 +1,4 @@ -/* Verify a password. +/* Verify a passphrase. Copyright (C) 1991-2018 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or @@ -20,24 +20,48 @@ #include <unistd.h> #include <crypt.h> +/* @samp{GNU's Not Unix} hashed using SHA-256, MD5, and DES. */ +static const char hash_sha[] = + "$5$DQ2z5NHf1jNJnChB$kV3ZTR0aUaosujPhLzR84Llo3BsspNSe4/tsp7VoEn6"; +static const char hash_md5[] = "$1$A3TxDv41$rtXVTUXl2LkeSV0UU5xxs1"; +static const char hash_des[] = "FgkTuF98w5DaI"; + int main(void) { - /* Hashed form of "GNU libc manual". */ - const char *const pass = "$1$/iSaq7rB$EoUw5jJPPvAPECNaaWzMK/"; + char *phrase; + int status = 0; + + /* Prompt for a passphrase. */ + phrase = getpass ("Enter passphrase: "); + + /* Compare against the stored hashes. Any input that begins with + @samp{GNU's No} will match the DES hash, but the other two will + only match @samp{GNU's Not Unix}. */ - char *result; - int ok; + if (strcmp (crypt (phrase, hash_sha), hash_sha)) + { + puts ("SHA: not ok"); + status = 1; + } + else + puts ("SHA: ok"); -/*@group*/ - /* Read in the user's password and encrypt it, - passing the expected password in as the salt. */ - result = crypt(getpass("Password:"), pass); -/*@end group*/ + if (strcmp (crypt (phrase, hash_md5), hash_md5)) + { + puts ("MD5: not ok"); + status = 1; + } + else + puts ("MD5: ok"); - /* Test the result. */ - ok = strcmp (result, pass) == 0; + if (strcmp (crypt (phrase, hash_des), hash_des)) + { + puts ("DES: not ok"); + status = 1; + } + else + puts ("DES: ok"); - puts(ok ? "Access granted." : "Access denied."); - return ok ? 0 : 1; + return status; } |