| 1 | /* Verify a passphrase. |
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| 2 | Copyright (C) 1991-2022 Free Software Foundation, Inc. |
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| 3 | |
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| 4 | This program is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU General Public License |
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| 6 | as published by the Free Software Foundation; either version 2 |
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| 7 | of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | This program is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 12 | GNU General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU General Public License |
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| 15 | along with this program; if not, see <https://www.gnu.org/licenses/>. |
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| 16 | */ |
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| 17 | |
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| 18 | #include <stdio.h> |
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| 19 | #include <string.h> |
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| 20 | #include <unistd.h> |
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| 21 | #include <crypt.h> |
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| 22 | |
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| 23 | /* @samp{GNU's Not Unix} hashed using SHA-256, MD5, and DES. */ |
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| 24 | static const char hash_sha[] = |
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| 25 | "$5$DQ2z5NHf1jNJnChB$kV3ZTR0aUaosujPhLzR84Llo3BsspNSe4/tsp7VoEn6" ; |
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| 26 | static const char hash_md5[] = "$1$A3TxDv41$rtXVTUXl2LkeSV0UU5xxs1" ; |
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| 27 | static const char hash_des[] = "FgkTuF98w5DaI" ; |
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| 28 | |
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| 29 | int |
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| 30 | main(void) |
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| 31 | { |
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| 32 | char *phrase; |
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| 33 | int status = 0; |
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| 34 | |
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| 35 | /* Prompt for a passphrase. */ |
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| 36 | phrase = getpass (prompt: "Enter passphrase: " ); |
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| 37 | |
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| 38 | /* Compare against the stored hashes. Any input that begins with |
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| 39 | @samp{GNU's No} will match the DES hash, but the other two will |
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| 40 | only match @samp{GNU's Not Unix}. */ |
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| 41 | |
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| 42 | if (strcmp (crypt (phrase: phrase, salt: hash_sha), hash_sha)) |
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| 43 | { |
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| 44 | puts (s: "SHA: not ok" ); |
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| 45 | status = 1; |
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| 46 | } |
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| 47 | else |
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| 48 | puts (s: "SHA: ok" ); |
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| 49 | |
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| 50 | if (strcmp (crypt (phrase: phrase, salt: hash_md5), hash_md5)) |
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| 51 | { |
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| 52 | puts (s: "MD5: not ok" ); |
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| 53 | status = 1; |
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| 54 | } |
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| 55 | else |
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| 56 | puts (s: "MD5: ok" ); |
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| 57 | |
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| 58 | if (strcmp (crypt (phrase: phrase, salt: hash_des), hash_des)) |
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| 59 | { |
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| 60 | puts (s: "DES: not ok" ); |
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| 61 | status = 1; |
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| 62 | } |
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| 63 | else |
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| 64 | puts (s: "DES: ok" ); |
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| 65 | |
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| 66 | return status; |
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| 67 | } |
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| 68 | |
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