diff options
Diffstat (limited to 'target/linux/ubicom32/files/arch/ubicom32/crypto/des_check_key.c')
| -rw-r--r-- | target/linux/ubicom32/files/arch/ubicom32/crypto/des_check_key.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/target/linux/ubicom32/files/arch/ubicom32/crypto/des_check_key.c b/target/linux/ubicom32/files/arch/ubicom32/crypto/des_check_key.c new file mode 100644 index 000000000..162e52477 --- /dev/null +++ b/target/linux/ubicom32/files/arch/ubicom32/crypto/des_check_key.c @@ -0,0 +1,148 @@ +/* + * arch/ubicom32/crypto/des_check_key.c + * Ubicom32 architecture function for checking keys for the DES and + * Tripple DES Encryption algorithms. + * + * (C) Copyright 2009, Ubicom, Inc. + * + * Originally released as descore by Dana L. How <how@isl.stanford.edu>. + * Modified by Raimar Falke <rf13@inf.tu-dresden.de> for the Linux-Kernel. + * Derived from Cryptoapi and Nettle implementations, adapted for in-place + * scatterlist interface. Changed LGPL to GPL per section 3 of the LGPL. + * + * s390 Version: + * Copyright IBM Corp. 2003 + * Author(s): Thomas Spatzier + * Jan Glauber (jan.glauber@de.ibm.com) + * + * Derived from "crypto/des.c" + * Copyright (c) 1992 Dana L. How. + * Copyright (c) Raimar Falke <rf13@inf.tu-dresden.de> + * Copyright (c) Gisle Sflensminde <gisle@ii.uib.no> + * Copyright (C) 2001 Niels Mvller. + * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> + * + * This file is part of the Ubicom32 Linux Kernel Port. + * + * The Ubicom32 Linux Kernel Port is free software: you can redistribute + * it and/or modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, either version 2 of the + * License, or (at your option) any later version. + * + * The Ubicom32 Linux Kernel Port 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with the Ubicom32 Linux Kernel Port. If not, + * see <http://www.gnu.org/licenses/>. + * + * Ubicom32 implementation derived from (with many thanks): + * arch/m68knommu + * arch/blackfin + * arch/parisc + */ +#include <linux/init.h> +#include <linux/module.h> +#include <linux/errno.h> +#include <linux/crypto.h> +#include "crypto_des.h" + +#define ROR(d,c,o) ((d) = (d) >> (c) | (d) << (o)) + +static const u8 parity[] = { + 8,1,0,8,0,8,8,0,0,8,8,0,8,0,2,8,0,8,8,0,8,0,0,8,8,0,0,8,0,8,8,3, + 0,8,8,0,8,0,0,8,8,0,0,8,0,8,8,0,8,0,0,8,0,8,8,0,0,8,8,0,8,0,0,8, + 0,8,8,0,8,0,0,8,8,0,0,8,0,8,8,0,8,0,0,8,0,8,8,0,0,8,8,0,8,0,0,8, + 8,0,0,8,0,8,8,0,0,8,8,0,8,0,0,8,0,8,8,0,8,0,0,8,8,0,0,8,0,8,8,0, + 0,8,8,0,8,0,0,8,8,0,0,8,0,8,8,0,8,0,0,8,0,8,8,0,0,8,8,0,8,0,0,8, + 8,0,0,8,0,8,8,0,0,8,8,0,8,0,0,8,0,8,8,0,8,0,0,8,8,0,0,8,0,8,8,0, + 8,0,0,8,0,8,8,0,0,8,8,0,8,0,0,8,0,8,8,0,8,0,0,8,8,0,0,8,0,8,8,0, + 4,8,8,0,8,0,0,8,8,0,0,8,0,8,8,0,8,5,0,8,0,8,8,0,0,8,8,0,8,0,6,8, +}; + +/* + * RFC2451: Weak key checks SHOULD be performed. + */ +int +crypto_des_check_key(const u8 *key, unsigned int keylen, u32 *flags) +{ + u32 n, w; + + n = parity[key[0]]; n <<= 4; + n |= parity[key[1]]; n <<= 4; + n |= parity[key[2]]; n <<= 4; + n |= parity[key[3]]; n <<= 4; + n |= parity[key[4]]; n <<= 4; + n |= parity[key[5]]; n <<= 4; + n |= parity[key[6]]; n <<= 4; + n |= parity[key[7]]; + w = 0x88888888L; + + if ((*flags & CRYPTO_TFM_REQ_WEAK_KEY) + && !((n - (w >> 3)) & w)) { /* 1 in 10^10 keys passes this test */ + if (n < 0x41415151) { + if (n < 0x31312121) { + if (n < 0x14141515) { + /* 01 01 01 01 01 01 01 01 */ + if (n == 0x11111111) goto weak; + /* 01 1F 01 1F 01 0E 01 0E */ + if (n == 0x13131212) goto weak; + } else { + /* 01 E0 01 E0 01 F1 01 F1 */ + if (n == 0x14141515) goto weak; + /* 01 FE 01 FE 01 FE 01 FE */ + if (n == 0x16161616) goto weak; + } + } else { + if (n < 0x34342525) { + /* 1F 01 1F 01 0E 01 0E 01 */ + if (n == 0x31312121) goto weak; + /* 1F 1F 1F 1F 0E 0E 0E 0E (?) */ + if (n == 0x33332222) goto weak; + } else { + /* 1F E0 1F E0 0E F1 0E F1 */ + if (n == 0x34342525) goto weak; + /* 1F FE 1F FE 0E FE 0E FE */ + if (n == 0x36362626) goto weak; + } + } + } else { + if (n < 0x61616161) { + if (n < 0x44445555) { + /* E0 01 E0 01 F1 01 F1 01 */ + if (n == 0x41415151) goto weak; + /* E0 1F E0 1F F1 0E F1 0E */ + if (n == 0x43435252) goto weak; + } else { + /* E0 E0 E0 E0 F1 F1 F1 F1 (?) */ + if (n == 0x44445555) goto weak; + /* E0 FE E0 FE F1 FE F1 FE */ + if (n == 0x46465656) goto weak; + } + } else { + if (n < 0x64646565) { + /* FE 01 FE 01 FE 01 FE 01 */ + if (n == 0x61616161) goto weak; + /* FE 1F FE 1F FE 0E FE 0E */ + if (n == 0x63636262) goto weak; + } else { + /* FE E0 FE E0 FE F1 FE F1 */ + if (n == 0x64646565) goto weak; + /* FE FE FE FE FE FE FE FE */ + if (n == 0x66666666) goto weak; + } + } + } + } + return 0; +weak: + *flags |= CRYPTO_TFM_RES_WEAK_KEY; + return -EINVAL; +} + +EXPORT_SYMBOL(crypto_des_check_key); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Key Check function for DES & DES3 Cipher Algorithms"); |