Line data Source code
1 : /* blowfish.c - Blowfish encryption
2 : * Copyright (C) 1998, 2001, 2002, 2003 Free Software Foundation, Inc.
3 : *
4 : * This file is part of Libgcrypt.
5 : *
6 : * Libgcrypt is free software; you can redistribute it and/or modify
7 : * it under the terms of the GNU Lesser general Public License as
8 : * published by the Free Software Foundation; either version 2.1 of
9 : * the License, or (at your option) any later version.
10 : *
11 : * Libgcrypt is distributed in the hope that it will be useful,
12 : * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 : * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 : * GNU Lesser General Public License for more details.
15 : *
16 : * You should have received a copy of the GNU Lesser General Public
17 : * License along with this program; if not, write to the Free Software
18 : * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
19 : *
20 : * For a description of the algorithm, see:
21 : * Bruce Schneier: Applied Cryptography. John Wiley & Sons, 1996.
22 : * ISBN 0-471-11709-9. Pages 336 ff.
23 : */
24 :
25 : /* Test values:
26 : * key "abcdefghijklmnopqrstuvwxyz";
27 : * plain "BLOWFISH"
28 : * cipher 32 4E D0 FE F4 13 A2 03
29 : *
30 : */
31 :
32 : #include <config.h>
33 : #include <stdio.h>
34 : #include <stdlib.h>
35 : #include <string.h>
36 : #include "types.h"
37 : #include "g10lib.h"
38 : #include "cipher.h"
39 : #include "bufhelp.h"
40 : #include "cipher-selftest.h"
41 :
42 : #define BLOWFISH_BLOCKSIZE 8
43 : #define BLOWFISH_ROUNDS 16
44 :
45 :
46 : /* USE_AMD64_ASM indicates whether to use AMD64 assembly code. */
47 : #undef USE_AMD64_ASM
48 : #if defined(__x86_64__) && (defined(HAVE_COMPATIBLE_GCC_AMD64_PLATFORM_AS) || \
49 : defined(HAVE_COMPATIBLE_GCC_WIN64_PLATFORM_AS)) && \
50 : (BLOWFISH_ROUNDS == 16)
51 : # define USE_AMD64_ASM 1
52 : #endif
53 :
54 : /* USE_ARM_ASM indicates whether to use ARM assembly code. */
55 : #undef USE_ARM_ASM
56 : #if defined(__ARMEL__)
57 : # if (BLOWFISH_ROUNDS == 16) && defined(HAVE_COMPATIBLE_GCC_ARM_PLATFORM_AS)
58 : # define USE_ARM_ASM 1
59 : # endif
60 : #endif
61 :
62 : typedef struct {
63 : u32 s0[256];
64 : u32 s1[256];
65 : u32 s2[256];
66 : u32 s3[256];
67 : u32 p[BLOWFISH_ROUNDS+2];
68 : } BLOWFISH_context;
69 :
70 : static gcry_err_code_t bf_setkey (void *c, const byte *key, unsigned keylen);
71 : static unsigned int encrypt_block (void *bc, byte *outbuf, const byte *inbuf);
72 : static unsigned int decrypt_block (void *bc, byte *outbuf, const byte *inbuf);
73 :
74 :
75 : /* precomputed S boxes */
76 : static const u32 ks0[256] = {
77 : 0xD1310BA6,0x98DFB5AC,0x2FFD72DB,0xD01ADFB7,0xB8E1AFED,0x6A267E96,
78 : 0xBA7C9045,0xF12C7F99,0x24A19947,0xB3916CF7,0x0801F2E2,0x858EFC16,
79 : 0x636920D8,0x71574E69,0xA458FEA3,0xF4933D7E,0x0D95748F,0x728EB658,
80 : 0x718BCD58,0x82154AEE,0x7B54A41D,0xC25A59B5,0x9C30D539,0x2AF26013,
81 : 0xC5D1B023,0x286085F0,0xCA417918,0xB8DB38EF,0x8E79DCB0,0x603A180E,
82 : 0x6C9E0E8B,0xB01E8A3E,0xD71577C1,0xBD314B27,0x78AF2FDA,0x55605C60,
83 : 0xE65525F3,0xAA55AB94,0x57489862,0x63E81440,0x55CA396A,0x2AAB10B6,
84 : 0xB4CC5C34,0x1141E8CE,0xA15486AF,0x7C72E993,0xB3EE1411,0x636FBC2A,
85 : 0x2BA9C55D,0x741831F6,0xCE5C3E16,0x9B87931E,0xAFD6BA33,0x6C24CF5C,
86 : 0x7A325381,0x28958677,0x3B8F4898,0x6B4BB9AF,0xC4BFE81B,0x66282193,
87 : 0x61D809CC,0xFB21A991,0x487CAC60,0x5DEC8032,0xEF845D5D,0xE98575B1,
88 : 0xDC262302,0xEB651B88,0x23893E81,0xD396ACC5,0x0F6D6FF3,0x83F44239,
89 : 0x2E0B4482,0xA4842004,0x69C8F04A,0x9E1F9B5E,0x21C66842,0xF6E96C9A,
90 : 0x670C9C61,0xABD388F0,0x6A51A0D2,0xD8542F68,0x960FA728,0xAB5133A3,
91 : 0x6EEF0B6C,0x137A3BE4,0xBA3BF050,0x7EFB2A98,0xA1F1651D,0x39AF0176,
92 : 0x66CA593E,0x82430E88,0x8CEE8619,0x456F9FB4,0x7D84A5C3,0x3B8B5EBE,
93 : 0xE06F75D8,0x85C12073,0x401A449F,0x56C16AA6,0x4ED3AA62,0x363F7706,
94 : 0x1BFEDF72,0x429B023D,0x37D0D724,0xD00A1248,0xDB0FEAD3,0x49F1C09B,
95 : 0x075372C9,0x80991B7B,0x25D479D8,0xF6E8DEF7,0xE3FE501A,0xB6794C3B,
96 : 0x976CE0BD,0x04C006BA,0xC1A94FB6,0x409F60C4,0x5E5C9EC2,0x196A2463,
97 : 0x68FB6FAF,0x3E6C53B5,0x1339B2EB,0x3B52EC6F,0x6DFC511F,0x9B30952C,
98 : 0xCC814544,0xAF5EBD09,0xBEE3D004,0xDE334AFD,0x660F2807,0x192E4BB3,
99 : 0xC0CBA857,0x45C8740F,0xD20B5F39,0xB9D3FBDB,0x5579C0BD,0x1A60320A,
100 : 0xD6A100C6,0x402C7279,0x679F25FE,0xFB1FA3CC,0x8EA5E9F8,0xDB3222F8,
101 : 0x3C7516DF,0xFD616B15,0x2F501EC8,0xAD0552AB,0x323DB5FA,0xFD238760,
102 : 0x53317B48,0x3E00DF82,0x9E5C57BB,0xCA6F8CA0,0x1A87562E,0xDF1769DB,
103 : 0xD542A8F6,0x287EFFC3,0xAC6732C6,0x8C4F5573,0x695B27B0,0xBBCA58C8,
104 : 0xE1FFA35D,0xB8F011A0,0x10FA3D98,0xFD2183B8,0x4AFCB56C,0x2DD1D35B,
105 : 0x9A53E479,0xB6F84565,0xD28E49BC,0x4BFB9790,0xE1DDF2DA,0xA4CB7E33,
106 : 0x62FB1341,0xCEE4C6E8,0xEF20CADA,0x36774C01,0xD07E9EFE,0x2BF11FB4,
107 : 0x95DBDA4D,0xAE909198,0xEAAD8E71,0x6B93D5A0,0xD08ED1D0,0xAFC725E0,
108 : 0x8E3C5B2F,0x8E7594B7,0x8FF6E2FB,0xF2122B64,0x8888B812,0x900DF01C,
109 : 0x4FAD5EA0,0x688FC31C,0xD1CFF191,0xB3A8C1AD,0x2F2F2218,0xBE0E1777,
110 : 0xEA752DFE,0x8B021FA1,0xE5A0CC0F,0xB56F74E8,0x18ACF3D6,0xCE89E299,
111 : 0xB4A84FE0,0xFD13E0B7,0x7CC43B81,0xD2ADA8D9,0x165FA266,0x80957705,
112 : 0x93CC7314,0x211A1477,0xE6AD2065,0x77B5FA86,0xC75442F5,0xFB9D35CF,
113 : 0xEBCDAF0C,0x7B3E89A0,0xD6411BD3,0xAE1E7E49,0x00250E2D,0x2071B35E,
114 : 0x226800BB,0x57B8E0AF,0x2464369B,0xF009B91E,0x5563911D,0x59DFA6AA,
115 : 0x78C14389,0xD95A537F,0x207D5BA2,0x02E5B9C5,0x83260376,0x6295CFA9,
116 : 0x11C81968,0x4E734A41,0xB3472DCA,0x7B14A94A,0x1B510052,0x9A532915,
117 : 0xD60F573F,0xBC9BC6E4,0x2B60A476,0x81E67400,0x08BA6FB5,0x571BE91F,
118 : 0xF296EC6B,0x2A0DD915,0xB6636521,0xE7B9F9B6,0xFF34052E,0xC5855664,
119 : 0x53B02D5D,0xA99F8FA1,0x08BA4799,0x6E85076A };
120 :
121 : static const u32 ks1[256] = {
122 : 0x4B7A70E9,0xB5B32944,0xDB75092E,0xC4192623,0xAD6EA6B0,0x49A7DF7D,
123 : 0x9CEE60B8,0x8FEDB266,0xECAA8C71,0x699A17FF,0x5664526C,0xC2B19EE1,
124 : 0x193602A5,0x75094C29,0xA0591340,0xE4183A3E,0x3F54989A,0x5B429D65,
125 : 0x6B8FE4D6,0x99F73FD6,0xA1D29C07,0xEFE830F5,0x4D2D38E6,0xF0255DC1,
126 : 0x4CDD2086,0x8470EB26,0x6382E9C6,0x021ECC5E,0x09686B3F,0x3EBAEFC9,
127 : 0x3C971814,0x6B6A70A1,0x687F3584,0x52A0E286,0xB79C5305,0xAA500737,
128 : 0x3E07841C,0x7FDEAE5C,0x8E7D44EC,0x5716F2B8,0xB03ADA37,0xF0500C0D,
129 : 0xF01C1F04,0x0200B3FF,0xAE0CF51A,0x3CB574B2,0x25837A58,0xDC0921BD,
130 : 0xD19113F9,0x7CA92FF6,0x94324773,0x22F54701,0x3AE5E581,0x37C2DADC,
131 : 0xC8B57634,0x9AF3DDA7,0xA9446146,0x0FD0030E,0xECC8C73E,0xA4751E41,
132 : 0xE238CD99,0x3BEA0E2F,0x3280BBA1,0x183EB331,0x4E548B38,0x4F6DB908,
133 : 0x6F420D03,0xF60A04BF,0x2CB81290,0x24977C79,0x5679B072,0xBCAF89AF,
134 : 0xDE9A771F,0xD9930810,0xB38BAE12,0xDCCF3F2E,0x5512721F,0x2E6B7124,
135 : 0x501ADDE6,0x9F84CD87,0x7A584718,0x7408DA17,0xBC9F9ABC,0xE94B7D8C,
136 : 0xEC7AEC3A,0xDB851DFA,0x63094366,0xC464C3D2,0xEF1C1847,0x3215D908,
137 : 0xDD433B37,0x24C2BA16,0x12A14D43,0x2A65C451,0x50940002,0x133AE4DD,
138 : 0x71DFF89E,0x10314E55,0x81AC77D6,0x5F11199B,0x043556F1,0xD7A3C76B,
139 : 0x3C11183B,0x5924A509,0xF28FE6ED,0x97F1FBFA,0x9EBABF2C,0x1E153C6E,
140 : 0x86E34570,0xEAE96FB1,0x860E5E0A,0x5A3E2AB3,0x771FE71C,0x4E3D06FA,
141 : 0x2965DCB9,0x99E71D0F,0x803E89D6,0x5266C825,0x2E4CC978,0x9C10B36A,
142 : 0xC6150EBA,0x94E2EA78,0xA5FC3C53,0x1E0A2DF4,0xF2F74EA7,0x361D2B3D,
143 : 0x1939260F,0x19C27960,0x5223A708,0xF71312B6,0xEBADFE6E,0xEAC31F66,
144 : 0xE3BC4595,0xA67BC883,0xB17F37D1,0x018CFF28,0xC332DDEF,0xBE6C5AA5,
145 : 0x65582185,0x68AB9802,0xEECEA50F,0xDB2F953B,0x2AEF7DAD,0x5B6E2F84,
146 : 0x1521B628,0x29076170,0xECDD4775,0x619F1510,0x13CCA830,0xEB61BD96,
147 : 0x0334FE1E,0xAA0363CF,0xB5735C90,0x4C70A239,0xD59E9E0B,0xCBAADE14,
148 : 0xEECC86BC,0x60622CA7,0x9CAB5CAB,0xB2F3846E,0x648B1EAF,0x19BDF0CA,
149 : 0xA02369B9,0x655ABB50,0x40685A32,0x3C2AB4B3,0x319EE9D5,0xC021B8F7,
150 : 0x9B540B19,0x875FA099,0x95F7997E,0x623D7DA8,0xF837889A,0x97E32D77,
151 : 0x11ED935F,0x16681281,0x0E358829,0xC7E61FD6,0x96DEDFA1,0x7858BA99,
152 : 0x57F584A5,0x1B227263,0x9B83C3FF,0x1AC24696,0xCDB30AEB,0x532E3054,
153 : 0x8FD948E4,0x6DBC3128,0x58EBF2EF,0x34C6FFEA,0xFE28ED61,0xEE7C3C73,
154 : 0x5D4A14D9,0xE864B7E3,0x42105D14,0x203E13E0,0x45EEE2B6,0xA3AAABEA,
155 : 0xDB6C4F15,0xFACB4FD0,0xC742F442,0xEF6ABBB5,0x654F3B1D,0x41CD2105,
156 : 0xD81E799E,0x86854DC7,0xE44B476A,0x3D816250,0xCF62A1F2,0x5B8D2646,
157 : 0xFC8883A0,0xC1C7B6A3,0x7F1524C3,0x69CB7492,0x47848A0B,0x5692B285,
158 : 0x095BBF00,0xAD19489D,0x1462B174,0x23820E00,0x58428D2A,0x0C55F5EA,
159 : 0x1DADF43E,0x233F7061,0x3372F092,0x8D937E41,0xD65FECF1,0x6C223BDB,
160 : 0x7CDE3759,0xCBEE7460,0x4085F2A7,0xCE77326E,0xA6078084,0x19F8509E,
161 : 0xE8EFD855,0x61D99735,0xA969A7AA,0xC50C06C2,0x5A04ABFC,0x800BCADC,
162 : 0x9E447A2E,0xC3453484,0xFDD56705,0x0E1E9EC9,0xDB73DBD3,0x105588CD,
163 : 0x675FDA79,0xE3674340,0xC5C43465,0x713E38D8,0x3D28F89E,0xF16DFF20,
164 : 0x153E21E7,0x8FB03D4A,0xE6E39F2B,0xDB83ADF7 };
165 :
166 : static const u32 ks2[256] = {
167 : 0xE93D5A68,0x948140F7,0xF64C261C,0x94692934,0x411520F7,0x7602D4F7,
168 : 0xBCF46B2E,0xD4A20068,0xD4082471,0x3320F46A,0x43B7D4B7,0x500061AF,
169 : 0x1E39F62E,0x97244546,0x14214F74,0xBF8B8840,0x4D95FC1D,0x96B591AF,
170 : 0x70F4DDD3,0x66A02F45,0xBFBC09EC,0x03BD9785,0x7FAC6DD0,0x31CB8504,
171 : 0x96EB27B3,0x55FD3941,0xDA2547E6,0xABCA0A9A,0x28507825,0x530429F4,
172 : 0x0A2C86DA,0xE9B66DFB,0x68DC1462,0xD7486900,0x680EC0A4,0x27A18DEE,
173 : 0x4F3FFEA2,0xE887AD8C,0xB58CE006,0x7AF4D6B6,0xAACE1E7C,0xD3375FEC,
174 : 0xCE78A399,0x406B2A42,0x20FE9E35,0xD9F385B9,0xEE39D7AB,0x3B124E8B,
175 : 0x1DC9FAF7,0x4B6D1856,0x26A36631,0xEAE397B2,0x3A6EFA74,0xDD5B4332,
176 : 0x6841E7F7,0xCA7820FB,0xFB0AF54E,0xD8FEB397,0x454056AC,0xBA489527,
177 : 0x55533A3A,0x20838D87,0xFE6BA9B7,0xD096954B,0x55A867BC,0xA1159A58,
178 : 0xCCA92963,0x99E1DB33,0xA62A4A56,0x3F3125F9,0x5EF47E1C,0x9029317C,
179 : 0xFDF8E802,0x04272F70,0x80BB155C,0x05282CE3,0x95C11548,0xE4C66D22,
180 : 0x48C1133F,0xC70F86DC,0x07F9C9EE,0x41041F0F,0x404779A4,0x5D886E17,
181 : 0x325F51EB,0xD59BC0D1,0xF2BCC18F,0x41113564,0x257B7834,0x602A9C60,
182 : 0xDFF8E8A3,0x1F636C1B,0x0E12B4C2,0x02E1329E,0xAF664FD1,0xCAD18115,
183 : 0x6B2395E0,0x333E92E1,0x3B240B62,0xEEBEB922,0x85B2A20E,0xE6BA0D99,
184 : 0xDE720C8C,0x2DA2F728,0xD0127845,0x95B794FD,0x647D0862,0xE7CCF5F0,
185 : 0x5449A36F,0x877D48FA,0xC39DFD27,0xF33E8D1E,0x0A476341,0x992EFF74,
186 : 0x3A6F6EAB,0xF4F8FD37,0xA812DC60,0xA1EBDDF8,0x991BE14C,0xDB6E6B0D,
187 : 0xC67B5510,0x6D672C37,0x2765D43B,0xDCD0E804,0xF1290DC7,0xCC00FFA3,
188 : 0xB5390F92,0x690FED0B,0x667B9FFB,0xCEDB7D9C,0xA091CF0B,0xD9155EA3,
189 : 0xBB132F88,0x515BAD24,0x7B9479BF,0x763BD6EB,0x37392EB3,0xCC115979,
190 : 0x8026E297,0xF42E312D,0x6842ADA7,0xC66A2B3B,0x12754CCC,0x782EF11C,
191 : 0x6A124237,0xB79251E7,0x06A1BBE6,0x4BFB6350,0x1A6B1018,0x11CAEDFA,
192 : 0x3D25BDD8,0xE2E1C3C9,0x44421659,0x0A121386,0xD90CEC6E,0xD5ABEA2A,
193 : 0x64AF674E,0xDA86A85F,0xBEBFE988,0x64E4C3FE,0x9DBC8057,0xF0F7C086,
194 : 0x60787BF8,0x6003604D,0xD1FD8346,0xF6381FB0,0x7745AE04,0xD736FCCC,
195 : 0x83426B33,0xF01EAB71,0xB0804187,0x3C005E5F,0x77A057BE,0xBDE8AE24,
196 : 0x55464299,0xBF582E61,0x4E58F48F,0xF2DDFDA2,0xF474EF38,0x8789BDC2,
197 : 0x5366F9C3,0xC8B38E74,0xB475F255,0x46FCD9B9,0x7AEB2661,0x8B1DDF84,
198 : 0x846A0E79,0x915F95E2,0x466E598E,0x20B45770,0x8CD55591,0xC902DE4C,
199 : 0xB90BACE1,0xBB8205D0,0x11A86248,0x7574A99E,0xB77F19B6,0xE0A9DC09,
200 : 0x662D09A1,0xC4324633,0xE85A1F02,0x09F0BE8C,0x4A99A025,0x1D6EFE10,
201 : 0x1AB93D1D,0x0BA5A4DF,0xA186F20F,0x2868F169,0xDCB7DA83,0x573906FE,
202 : 0xA1E2CE9B,0x4FCD7F52,0x50115E01,0xA70683FA,0xA002B5C4,0x0DE6D027,
203 : 0x9AF88C27,0x773F8641,0xC3604C06,0x61A806B5,0xF0177A28,0xC0F586E0,
204 : 0x006058AA,0x30DC7D62,0x11E69ED7,0x2338EA63,0x53C2DD94,0xC2C21634,
205 : 0xBBCBEE56,0x90BCB6DE,0xEBFC7DA1,0xCE591D76,0x6F05E409,0x4B7C0188,
206 : 0x39720A3D,0x7C927C24,0x86E3725F,0x724D9DB9,0x1AC15BB4,0xD39EB8FC,
207 : 0xED545578,0x08FCA5B5,0xD83D7CD3,0x4DAD0FC4,0x1E50EF5E,0xB161E6F8,
208 : 0xA28514D9,0x6C51133C,0x6FD5C7E7,0x56E14EC4,0x362ABFCE,0xDDC6C837,
209 : 0xD79A3234,0x92638212,0x670EFA8E,0x406000E0 };
210 :
211 : static const u32 ks3[256] = {
212 : 0x3A39CE37,0xD3FAF5CF,0xABC27737,0x5AC52D1B,0x5CB0679E,0x4FA33742,
213 : 0xD3822740,0x99BC9BBE,0xD5118E9D,0xBF0F7315,0xD62D1C7E,0xC700C47B,
214 : 0xB78C1B6B,0x21A19045,0xB26EB1BE,0x6A366EB4,0x5748AB2F,0xBC946E79,
215 : 0xC6A376D2,0x6549C2C8,0x530FF8EE,0x468DDE7D,0xD5730A1D,0x4CD04DC6,
216 : 0x2939BBDB,0xA9BA4650,0xAC9526E8,0xBE5EE304,0xA1FAD5F0,0x6A2D519A,
217 : 0x63EF8CE2,0x9A86EE22,0xC089C2B8,0x43242EF6,0xA51E03AA,0x9CF2D0A4,
218 : 0x83C061BA,0x9BE96A4D,0x8FE51550,0xBA645BD6,0x2826A2F9,0xA73A3AE1,
219 : 0x4BA99586,0xEF5562E9,0xC72FEFD3,0xF752F7DA,0x3F046F69,0x77FA0A59,
220 : 0x80E4A915,0x87B08601,0x9B09E6AD,0x3B3EE593,0xE990FD5A,0x9E34D797,
221 : 0x2CF0B7D9,0x022B8B51,0x96D5AC3A,0x017DA67D,0xD1CF3ED6,0x7C7D2D28,
222 : 0x1F9F25CF,0xADF2B89B,0x5AD6B472,0x5A88F54C,0xE029AC71,0xE019A5E6,
223 : 0x47B0ACFD,0xED93FA9B,0xE8D3C48D,0x283B57CC,0xF8D56629,0x79132E28,
224 : 0x785F0191,0xED756055,0xF7960E44,0xE3D35E8C,0x15056DD4,0x88F46DBA,
225 : 0x03A16125,0x0564F0BD,0xC3EB9E15,0x3C9057A2,0x97271AEC,0xA93A072A,
226 : 0x1B3F6D9B,0x1E6321F5,0xF59C66FB,0x26DCF319,0x7533D928,0xB155FDF5,
227 : 0x03563482,0x8ABA3CBB,0x28517711,0xC20AD9F8,0xABCC5167,0xCCAD925F,
228 : 0x4DE81751,0x3830DC8E,0x379D5862,0x9320F991,0xEA7A90C2,0xFB3E7BCE,
229 : 0x5121CE64,0x774FBE32,0xA8B6E37E,0xC3293D46,0x48DE5369,0x6413E680,
230 : 0xA2AE0810,0xDD6DB224,0x69852DFD,0x09072166,0xB39A460A,0x6445C0DD,
231 : 0x586CDECF,0x1C20C8AE,0x5BBEF7DD,0x1B588D40,0xCCD2017F,0x6BB4E3BB,
232 : 0xDDA26A7E,0x3A59FF45,0x3E350A44,0xBCB4CDD5,0x72EACEA8,0xFA6484BB,
233 : 0x8D6612AE,0xBF3C6F47,0xD29BE463,0x542F5D9E,0xAEC2771B,0xF64E6370,
234 : 0x740E0D8D,0xE75B1357,0xF8721671,0xAF537D5D,0x4040CB08,0x4EB4E2CC,
235 : 0x34D2466A,0x0115AF84,0xE1B00428,0x95983A1D,0x06B89FB4,0xCE6EA048,
236 : 0x6F3F3B82,0x3520AB82,0x011A1D4B,0x277227F8,0x611560B1,0xE7933FDC,
237 : 0xBB3A792B,0x344525BD,0xA08839E1,0x51CE794B,0x2F32C9B7,0xA01FBAC9,
238 : 0xE01CC87E,0xBCC7D1F6,0xCF0111C3,0xA1E8AAC7,0x1A908749,0xD44FBD9A,
239 : 0xD0DADECB,0xD50ADA38,0x0339C32A,0xC6913667,0x8DF9317C,0xE0B12B4F,
240 : 0xF79E59B7,0x43F5BB3A,0xF2D519FF,0x27D9459C,0xBF97222C,0x15E6FC2A,
241 : 0x0F91FC71,0x9B941525,0xFAE59361,0xCEB69CEB,0xC2A86459,0x12BAA8D1,
242 : 0xB6C1075E,0xE3056A0C,0x10D25065,0xCB03A442,0xE0EC6E0E,0x1698DB3B,
243 : 0x4C98A0BE,0x3278E964,0x9F1F9532,0xE0D392DF,0xD3A0342B,0x8971F21E,
244 : 0x1B0A7441,0x4BA3348C,0xC5BE7120,0xC37632D8,0xDF359F8D,0x9B992F2E,
245 : 0xE60B6F47,0x0FE3F11D,0xE54CDA54,0x1EDAD891,0xCE6279CF,0xCD3E7E6F,
246 : 0x1618B166,0xFD2C1D05,0x848FD2C5,0xF6FB2299,0xF523F357,0xA6327623,
247 : 0x93A83531,0x56CCCD02,0xACF08162,0x5A75EBB5,0x6E163697,0x88D273CC,
248 : 0xDE966292,0x81B949D0,0x4C50901B,0x71C65614,0xE6C6C7BD,0x327A140A,
249 : 0x45E1D006,0xC3F27B9A,0xC9AA53FD,0x62A80F00,0xBB25BFE2,0x35BDD2F6,
250 : 0x71126905,0xB2040222,0xB6CBCF7C,0xCD769C2B,0x53113EC0,0x1640E3D3,
251 : 0x38ABBD60,0x2547ADF0,0xBA38209C,0xF746CE76,0x77AFA1C5,0x20756060,
252 : 0x85CBFE4E,0x8AE88DD8,0x7AAAF9B0,0x4CF9AA7E,0x1948C25C,0x02FB8A8C,
253 : 0x01C36AE4,0xD6EBE1F9,0x90D4F869,0xA65CDEA0,0x3F09252D,0xC208E69F,
254 : 0xB74E6132,0xCE77E25B,0x578FDFE3,0x3AC372E6 };
255 :
256 : static const u32 ps[BLOWFISH_ROUNDS+2] = {
257 : 0x243F6A88,0x85A308D3,0x13198A2E,0x03707344,0xA4093822,0x299F31D0,
258 : 0x082EFA98,0xEC4E6C89,0x452821E6,0x38D01377,0xBE5466CF,0x34E90C6C,
259 : 0xC0AC29B7,0xC97C50DD,0x3F84D5B5,0xB5470917,0x9216D5D9,0x8979FB1B };
260 :
261 :
262 : #ifdef USE_AMD64_ASM
263 :
264 : /* Assembly implementations of Blowfish. */
265 : extern void _gcry_blowfish_amd64_do_encrypt(BLOWFISH_context *c, u32 *ret_xl,
266 : u32 *ret_xr);
267 :
268 : extern void _gcry_blowfish_amd64_encrypt_block(BLOWFISH_context *c, byte *out,
269 : const byte *in);
270 :
271 : extern void _gcry_blowfish_amd64_decrypt_block(BLOWFISH_context *c, byte *out,
272 : const byte *in);
273 :
274 : /* These assembly implementations process four blocks in parallel. */
275 : extern void _gcry_blowfish_amd64_ctr_enc(BLOWFISH_context *ctx, byte *out,
276 : const byte *in, byte *ctr);
277 :
278 : extern void _gcry_blowfish_amd64_cbc_dec(BLOWFISH_context *ctx, byte *out,
279 : const byte *in, byte *iv);
280 :
281 : extern void _gcry_blowfish_amd64_cfb_dec(BLOWFISH_context *ctx, byte *out,
282 : const byte *in, byte *iv);
283 :
284 : #ifdef HAVE_COMPATIBLE_GCC_WIN64_PLATFORM_AS
285 : static inline void
286 : call_sysv_fn (const void *fn, const void *arg1, const void *arg2,
287 : const void *arg3, const void *arg4)
288 : {
289 : /* Call SystemV ABI function without storing non-volatile XMM registers,
290 : * as target function does not use vector instruction sets. */
291 : asm volatile ("callq *%0\n\t"
292 : : "+a" (fn),
293 : "+D" (arg1),
294 : "+S" (arg2),
295 : "+d" (arg3),
296 : "+c" (arg4)
297 : :
298 : : "cc", "memory", "r8", "r9", "r10", "r11");
299 : }
300 : #endif
301 :
302 : static void
303 0 : do_encrypt ( BLOWFISH_context *bc, u32 *ret_xl, u32 *ret_xr )
304 : {
305 : #ifdef HAVE_COMPATIBLE_GCC_WIN64_PLATFORM_AS
306 : call_sysv_fn (_gcry_blowfish_amd64_do_encrypt, bc, ret_xl, ret_xr, NULL);
307 : #else
308 0 : _gcry_blowfish_amd64_do_encrypt (bc, ret_xl, ret_xr);
309 : #endif
310 0 : }
311 :
312 : static void
313 0 : do_encrypt_block (BLOWFISH_context *context, byte *outbuf, const byte *inbuf)
314 : {
315 : #ifdef HAVE_COMPATIBLE_GCC_WIN64_PLATFORM_AS
316 : call_sysv_fn (_gcry_blowfish_amd64_encrypt_block, context, outbuf, inbuf,
317 : NULL);
318 : #else
319 0 : _gcry_blowfish_amd64_encrypt_block (context, outbuf, inbuf);
320 : #endif
321 0 : }
322 :
323 : static void
324 0 : do_decrypt_block (BLOWFISH_context *context, byte *outbuf, const byte *inbuf)
325 : {
326 : #ifdef HAVE_COMPATIBLE_GCC_WIN64_PLATFORM_AS
327 : call_sysv_fn (_gcry_blowfish_amd64_decrypt_block, context, outbuf, inbuf,
328 : NULL);
329 : #else
330 0 : _gcry_blowfish_amd64_decrypt_block (context, outbuf, inbuf);
331 : #endif
332 0 : }
333 :
334 : static inline void
335 0 : blowfish_amd64_ctr_enc(BLOWFISH_context *ctx, byte *out, const byte *in,
336 : byte *ctr)
337 : {
338 : #ifdef HAVE_COMPATIBLE_GCC_WIN64_PLATFORM_AS
339 : call_sysv_fn (_gcry_blowfish_amd64_ctr_enc, ctx, out, in, ctr);
340 : #else
341 0 : _gcry_blowfish_amd64_ctr_enc(ctx, out, in, ctr);
342 : #endif
343 0 : }
344 :
345 : static inline void
346 0 : blowfish_amd64_cbc_dec(BLOWFISH_context *ctx, byte *out, const byte *in,
347 : byte *iv)
348 : {
349 : #ifdef HAVE_COMPATIBLE_GCC_WIN64_PLATFORM_AS
350 : call_sysv_fn (_gcry_blowfish_amd64_cbc_dec, ctx, out, in, iv);
351 : #else
352 0 : _gcry_blowfish_amd64_cbc_dec(ctx, out, in, iv);
353 : #endif
354 0 : }
355 :
356 : static inline void
357 0 : blowfish_amd64_cfb_dec(BLOWFISH_context *ctx, byte *out, const byte *in,
358 : byte *iv)
359 : {
360 : #ifdef HAVE_COMPATIBLE_GCC_WIN64_PLATFORM_AS
361 : call_sysv_fn (_gcry_blowfish_amd64_cfb_dec, ctx, out, in, iv);
362 : #else
363 0 : _gcry_blowfish_amd64_cfb_dec(ctx, out, in, iv);
364 : #endif
365 0 : }
366 :
367 : static unsigned int
368 0 : encrypt_block (void *context , byte *outbuf, const byte *inbuf)
369 : {
370 0 : BLOWFISH_context *c = (BLOWFISH_context *) context;
371 0 : do_encrypt_block (c, outbuf, inbuf);
372 0 : return /*burn_stack*/ (2*8);
373 : }
374 :
375 : static unsigned int
376 0 : decrypt_block (void *context, byte *outbuf, const byte *inbuf)
377 : {
378 0 : BLOWFISH_context *c = (BLOWFISH_context *) context;
379 0 : do_decrypt_block (c, outbuf, inbuf);
380 0 : return /*burn_stack*/ (2*8);
381 : }
382 :
383 : #elif defined(USE_ARM_ASM)
384 :
385 : /* Assembly implementations of Blowfish. */
386 : extern void _gcry_blowfish_arm_do_encrypt(BLOWFISH_context *c, u32 *ret_xl,
387 : u32 *ret_xr);
388 :
389 : extern void _gcry_blowfish_arm_encrypt_block(BLOWFISH_context *c, byte *out,
390 : const byte *in);
391 :
392 : extern void _gcry_blowfish_arm_decrypt_block(BLOWFISH_context *c, byte *out,
393 : const byte *in);
394 :
395 : /* These assembly implementations process two blocks in parallel. */
396 : extern void _gcry_blowfish_arm_ctr_enc(BLOWFISH_context *ctx, byte *out,
397 : const byte *in, byte *ctr);
398 :
399 : extern void _gcry_blowfish_arm_cbc_dec(BLOWFISH_context *ctx, byte *out,
400 : const byte *in, byte *iv);
401 :
402 : extern void _gcry_blowfish_arm_cfb_dec(BLOWFISH_context *ctx, byte *out,
403 : const byte *in, byte *iv);
404 :
405 : static void
406 : do_encrypt ( BLOWFISH_context *bc, u32 *ret_xl, u32 *ret_xr )
407 : {
408 : _gcry_blowfish_arm_do_encrypt (bc, ret_xl, ret_xr);
409 : }
410 :
411 : static void
412 : do_encrypt_block (BLOWFISH_context *context, byte *outbuf, const byte *inbuf)
413 : {
414 : _gcry_blowfish_arm_encrypt_block (context, outbuf, inbuf);
415 : }
416 :
417 : static void
418 : do_decrypt_block (BLOWFISH_context *context, byte *outbuf, const byte *inbuf)
419 : {
420 : _gcry_blowfish_arm_decrypt_block (context, outbuf, inbuf);
421 : }
422 :
423 : static unsigned int
424 : encrypt_block (void *context , byte *outbuf, const byte *inbuf)
425 : {
426 : BLOWFISH_context *c = (BLOWFISH_context *) context;
427 : do_encrypt_block (c, outbuf, inbuf);
428 : return /*burn_stack*/ (10*4);
429 : }
430 :
431 : static unsigned int
432 : decrypt_block (void *context, byte *outbuf, const byte *inbuf)
433 : {
434 : BLOWFISH_context *c = (BLOWFISH_context *) context;
435 : do_decrypt_block (c, outbuf, inbuf);
436 : return /*burn_stack*/ (10*4);
437 : }
438 :
439 : #else /*USE_ARM_ASM*/
440 :
441 : #if BLOWFISH_ROUNDS != 16
442 : static inline u32
443 : function_F( BLOWFISH_context *bc, u32 x )
444 : {
445 : u16 a, b, c, d;
446 :
447 : #ifdef WORDS_BIGENDIAN
448 : a = ((byte*)&x)[0];
449 : b = ((byte*)&x)[1];
450 : c = ((byte*)&x)[2];
451 : d = ((byte*)&x)[3];
452 : #else
453 : a = ((byte*)&x)[3];
454 : b = ((byte*)&x)[2];
455 : c = ((byte*)&x)[1];
456 : d = ((byte*)&x)[0];
457 : #endif
458 :
459 : return ((bc->s0[a] + bc->s1[b]) ^ bc->s2[c] ) + bc->s3[d];
460 : }
461 : #endif
462 :
463 : #ifdef WORDS_BIGENDIAN
464 : #define F(x) ((( s0[((byte*)&x)[0]] + s1[((byte*)&x)[1]]) \
465 : ^ s2[((byte*)&x)[2]]) + s3[((byte*)&x)[3]] )
466 : #else
467 : #define F(x) ((( s0[((byte*)&x)[3]] + s1[((byte*)&x)[2]]) \
468 : ^ s2[((byte*)&x)[1]]) + s3[((byte*)&x)[0]] )
469 : #endif
470 : #define R(l,r,i) do { l ^= p[i]; r ^= F(l); } while(0)
471 :
472 :
473 : static void
474 : do_encrypt ( BLOWFISH_context *bc, u32 *ret_xl, u32 *ret_xr )
475 : {
476 : #if BLOWFISH_ROUNDS == 16
477 : u32 xl, xr, *s0, *s1, *s2, *s3, *p;
478 :
479 : xl = *ret_xl;
480 : xr = *ret_xr;
481 : p = bc->p;
482 : s0 = bc->s0;
483 : s1 = bc->s1;
484 : s2 = bc->s2;
485 : s3 = bc->s3;
486 :
487 : R( xl, xr, 0);
488 : R( xr, xl, 1);
489 : R( xl, xr, 2);
490 : R( xr, xl, 3);
491 : R( xl, xr, 4);
492 : R( xr, xl, 5);
493 : R( xl, xr, 6);
494 : R( xr, xl, 7);
495 : R( xl, xr, 8);
496 : R( xr, xl, 9);
497 : R( xl, xr, 10);
498 : R( xr, xl, 11);
499 : R( xl, xr, 12);
500 : R( xr, xl, 13);
501 : R( xl, xr, 14);
502 : R( xr, xl, 15);
503 :
504 : xl ^= p[BLOWFISH_ROUNDS];
505 : xr ^= p[BLOWFISH_ROUNDS+1];
506 :
507 : *ret_xl = xr;
508 : *ret_xr = xl;
509 :
510 : #else
511 : u32 xl, xr, temp, *p;
512 : int i;
513 :
514 : xl = *ret_xl;
515 : xr = *ret_xr;
516 : p = bc->p;
517 :
518 : for(i=0; i < BLOWFISH_ROUNDS; i++ )
519 : {
520 : xl ^= p[i];
521 : xr ^= function_F(bc, xl);
522 : temp = xl;
523 : xl = xr;
524 : xr = temp;
525 : }
526 : temp = xl;
527 : xl = xr;
528 : xr = temp;
529 :
530 : xr ^= p[BLOWFISH_ROUNDS];
531 : xl ^= p[BLOWFISH_ROUNDS+1];
532 :
533 : *ret_xl = xl;
534 : *ret_xr = xr;
535 : #endif
536 : }
537 :
538 :
539 : static void
540 : decrypt ( BLOWFISH_context *bc, u32 *ret_xl, u32 *ret_xr )
541 : {
542 : #if BLOWFISH_ROUNDS == 16
543 : u32 xl, xr, *s0, *s1, *s2, *s3, *p;
544 :
545 : xl = *ret_xl;
546 : xr = *ret_xr;
547 : p = bc->p;
548 : s0 = bc->s0;
549 : s1 = bc->s1;
550 : s2 = bc->s2;
551 : s3 = bc->s3;
552 :
553 : R( xl, xr, 17);
554 : R( xr, xl, 16);
555 : R( xl, xr, 15);
556 : R( xr, xl, 14);
557 : R( xl, xr, 13);
558 : R( xr, xl, 12);
559 : R( xl, xr, 11);
560 : R( xr, xl, 10);
561 : R( xl, xr, 9);
562 : R( xr, xl, 8);
563 : R( xl, xr, 7);
564 : R( xr, xl, 6);
565 : R( xl, xr, 5);
566 : R( xr, xl, 4);
567 : R( xl, xr, 3);
568 : R( xr, xl, 2);
569 :
570 : xl ^= p[1];
571 : xr ^= p[0];
572 :
573 : *ret_xl = xr;
574 : *ret_xr = xl;
575 :
576 : #else
577 : u32 xl, xr, temp, *p;
578 : int i;
579 :
580 : xl = *ret_xl;
581 : xr = *ret_xr;
582 : p = bc->p;
583 :
584 : for (i=BLOWFISH_ROUNDS+1; i > 1; i-- )
585 : {
586 : xl ^= p[i];
587 : xr ^= function_F(bc, xl);
588 : temp = xl;
589 : xl = xr;
590 : xr = temp;
591 : }
592 :
593 : temp = xl;
594 : xl = xr;
595 : xr = temp;
596 :
597 : xr ^= p[1];
598 : xl ^= p[0];
599 :
600 : *ret_xl = xl;
601 : *ret_xr = xr;
602 : #endif
603 : }
604 :
605 : #undef F
606 : #undef R
607 :
608 : static void
609 : do_encrypt_block ( BLOWFISH_context *bc, byte *outbuf, const byte *inbuf )
610 : {
611 : u32 d1, d2;
612 :
613 : d1 = buf_get_be32(inbuf);
614 : d2 = buf_get_be32(inbuf + 4);
615 : do_encrypt( bc, &d1, &d2 );
616 : buf_put_be32(outbuf, d1);
617 : buf_put_be32(outbuf + 4, d2);
618 : }
619 :
620 : static unsigned int
621 : encrypt_block (void *context, byte *outbuf, const byte *inbuf)
622 : {
623 : BLOWFISH_context *bc = (BLOWFISH_context *) context;
624 : do_encrypt_block (bc, outbuf, inbuf);
625 : return /*burn_stack*/ (64);
626 : }
627 :
628 :
629 : static void
630 : do_decrypt_block (BLOWFISH_context *bc, byte *outbuf, const byte *inbuf)
631 : {
632 : u32 d1, d2;
633 :
634 : d1 = buf_get_be32(inbuf);
635 : d2 = buf_get_be32(inbuf + 4);
636 : decrypt( bc, &d1, &d2 );
637 : buf_put_be32(outbuf, d1);
638 : buf_put_be32(outbuf + 4, d2);
639 : }
640 :
641 : static unsigned int
642 : decrypt_block (void *context, byte *outbuf, const byte *inbuf)
643 : {
644 : BLOWFISH_context *bc = (BLOWFISH_context *) context;
645 : do_decrypt_block (bc, outbuf, inbuf);
646 : return /*burn_stack*/ (64);
647 : }
648 :
649 : #endif /*!USE_AMD64_ASM&&!USE_ARM_ASM*/
650 :
651 :
652 : /* Bulk encryption of complete blocks in CTR mode. This function is only
653 : intended for the bulk encryption feature of cipher.c. CTR is expected to be
654 : of size BLOWFISH_BLOCKSIZE. */
655 : void
656 0 : _gcry_blowfish_ctr_enc(void *context, unsigned char *ctr, void *outbuf_arg,
657 : const void *inbuf_arg, size_t nblocks)
658 : {
659 0 : BLOWFISH_context *ctx = context;
660 0 : unsigned char *outbuf = outbuf_arg;
661 0 : const unsigned char *inbuf = inbuf_arg;
662 : unsigned char tmpbuf[BLOWFISH_BLOCKSIZE];
663 0 : int burn_stack_depth = (64) + 2 * BLOWFISH_BLOCKSIZE;
664 : int i;
665 :
666 : #ifdef USE_AMD64_ASM
667 : {
668 0 : if (nblocks >= 4)
669 0 : burn_stack_depth += 5 * sizeof(void*);
670 :
671 : /* Process data in 4 block chunks. */
672 0 : while (nblocks >= 4)
673 : {
674 0 : blowfish_amd64_ctr_enc(ctx, outbuf, inbuf, ctr);
675 :
676 0 : nblocks -= 4;
677 0 : outbuf += 4 * BLOWFISH_BLOCKSIZE;
678 0 : inbuf += 4 * BLOWFISH_BLOCKSIZE;
679 : }
680 :
681 : /* Use generic code to handle smaller chunks... */
682 : /* TODO: use caching instead? */
683 : }
684 : #elif defined(USE_ARM_ASM)
685 : {
686 : /* Process data in 2 block chunks. */
687 : while (nblocks >= 2)
688 : {
689 : _gcry_blowfish_arm_ctr_enc(ctx, outbuf, inbuf, ctr);
690 :
691 : nblocks -= 2;
692 : outbuf += 2 * BLOWFISH_BLOCKSIZE;
693 : inbuf += 2 * BLOWFISH_BLOCKSIZE;
694 : }
695 :
696 : /* Use generic code to handle smaller chunks... */
697 : /* TODO: use caching instead? */
698 : }
699 : #endif
700 :
701 0 : for ( ;nblocks; nblocks-- )
702 : {
703 : /* Encrypt the counter. */
704 0 : do_encrypt_block(ctx, tmpbuf, ctr);
705 : /* XOR the input with the encrypted counter and store in output. */
706 0 : buf_xor(outbuf, tmpbuf, inbuf, BLOWFISH_BLOCKSIZE);
707 0 : outbuf += BLOWFISH_BLOCKSIZE;
708 0 : inbuf += BLOWFISH_BLOCKSIZE;
709 : /* Increment the counter. */
710 0 : for (i = BLOWFISH_BLOCKSIZE; i > 0; i--)
711 : {
712 0 : ctr[i-1]++;
713 0 : if (ctr[i-1])
714 0 : break;
715 : }
716 : }
717 :
718 0 : wipememory(tmpbuf, sizeof(tmpbuf));
719 0 : _gcry_burn_stack(burn_stack_depth);
720 0 : }
721 :
722 :
723 : /* Bulk decryption of complete blocks in CBC mode. This function is only
724 : intended for the bulk encryption feature of cipher.c. */
725 : void
726 0 : _gcry_blowfish_cbc_dec(void *context, unsigned char *iv, void *outbuf_arg,
727 : const void *inbuf_arg, size_t nblocks)
728 : {
729 0 : BLOWFISH_context *ctx = context;
730 0 : unsigned char *outbuf = outbuf_arg;
731 0 : const unsigned char *inbuf = inbuf_arg;
732 : unsigned char savebuf[BLOWFISH_BLOCKSIZE];
733 0 : int burn_stack_depth = (64) + 2 * BLOWFISH_BLOCKSIZE;
734 :
735 : #ifdef USE_AMD64_ASM
736 : {
737 0 : if (nblocks >= 4)
738 0 : burn_stack_depth += 5 * sizeof(void*);
739 :
740 : /* Process data in 4 block chunks. */
741 0 : while (nblocks >= 4)
742 : {
743 0 : blowfish_amd64_cbc_dec(ctx, outbuf, inbuf, iv);
744 :
745 0 : nblocks -= 4;
746 0 : outbuf += 4 * BLOWFISH_BLOCKSIZE;
747 0 : inbuf += 4 * BLOWFISH_BLOCKSIZE;
748 : }
749 :
750 : /* Use generic code to handle smaller chunks... */
751 : }
752 : #elif defined(USE_ARM_ASM)
753 : {
754 : /* Process data in 2 block chunks. */
755 : while (nblocks >= 2)
756 : {
757 : _gcry_blowfish_arm_cbc_dec(ctx, outbuf, inbuf, iv);
758 :
759 : nblocks -= 2;
760 : outbuf += 2 * BLOWFISH_BLOCKSIZE;
761 : inbuf += 2 * BLOWFISH_BLOCKSIZE;
762 : }
763 :
764 : /* Use generic code to handle smaller chunks... */
765 : }
766 : #endif
767 :
768 0 : for ( ;nblocks; nblocks-- )
769 : {
770 : /* INBUF is needed later and it may be identical to OUTBUF, so store
771 : the intermediate result to SAVEBUF. */
772 0 : do_decrypt_block (ctx, savebuf, inbuf);
773 :
774 0 : buf_xor_n_copy_2(outbuf, savebuf, iv, inbuf, BLOWFISH_BLOCKSIZE);
775 0 : inbuf += BLOWFISH_BLOCKSIZE;
776 0 : outbuf += BLOWFISH_BLOCKSIZE;
777 : }
778 :
779 0 : wipememory(savebuf, sizeof(savebuf));
780 0 : _gcry_burn_stack(burn_stack_depth);
781 0 : }
782 :
783 :
784 : /* Bulk decryption of complete blocks in CFB mode. This function is only
785 : intended for the bulk encryption feature of cipher.c. */
786 : void
787 0 : _gcry_blowfish_cfb_dec(void *context, unsigned char *iv, void *outbuf_arg,
788 : const void *inbuf_arg, size_t nblocks)
789 : {
790 0 : BLOWFISH_context *ctx = context;
791 0 : unsigned char *outbuf = outbuf_arg;
792 0 : const unsigned char *inbuf = inbuf_arg;
793 0 : int burn_stack_depth = (64) + 2 * BLOWFISH_BLOCKSIZE;
794 :
795 : #ifdef USE_AMD64_ASM
796 : {
797 0 : if (nblocks >= 4)
798 0 : burn_stack_depth += 5 * sizeof(void*);
799 :
800 : /* Process data in 4 block chunks. */
801 0 : while (nblocks >= 4)
802 : {
803 0 : blowfish_amd64_cfb_dec(ctx, outbuf, inbuf, iv);
804 :
805 0 : nblocks -= 4;
806 0 : outbuf += 4 * BLOWFISH_BLOCKSIZE;
807 0 : inbuf += 4 * BLOWFISH_BLOCKSIZE;
808 : }
809 :
810 : /* Use generic code to handle smaller chunks... */
811 : }
812 : #elif defined(USE_ARM_ASM)
813 : {
814 : /* Process data in 2 block chunks. */
815 : while (nblocks >= 2)
816 : {
817 : _gcry_blowfish_arm_cfb_dec(ctx, outbuf, inbuf, iv);
818 :
819 : nblocks -= 2;
820 : outbuf += 2 * BLOWFISH_BLOCKSIZE;
821 : inbuf += 2 * BLOWFISH_BLOCKSIZE;
822 : }
823 :
824 : /* Use generic code to handle smaller chunks... */
825 : }
826 : #endif
827 :
828 0 : for ( ;nblocks; nblocks-- )
829 : {
830 0 : do_encrypt_block(ctx, iv, iv);
831 0 : buf_xor_n_copy(outbuf, iv, inbuf, BLOWFISH_BLOCKSIZE);
832 0 : outbuf += BLOWFISH_BLOCKSIZE;
833 0 : inbuf += BLOWFISH_BLOCKSIZE;
834 : }
835 :
836 0 : _gcry_burn_stack(burn_stack_depth);
837 0 : }
838 :
839 :
840 : /* Run the self-tests for BLOWFISH-CTR, tests IV increment of bulk CTR
841 : encryption. Returns NULL on success. */
842 : static const char *
843 0 : selftest_ctr (void)
844 : {
845 0 : const int nblocks = 4+1;
846 0 : const int blocksize = BLOWFISH_BLOCKSIZE;
847 0 : const int context_size = sizeof(BLOWFISH_context);
848 :
849 0 : return _gcry_selftest_helper_ctr("BLOWFISH", &bf_setkey,
850 : &encrypt_block, &_gcry_blowfish_ctr_enc, nblocks, blocksize,
851 : context_size);
852 : }
853 :
854 :
855 : /* Run the self-tests for BLOWFISH-CBC, tests bulk CBC decryption.
856 : Returns NULL on success. */
857 : static const char *
858 0 : selftest_cbc (void)
859 : {
860 0 : const int nblocks = 4+2;
861 0 : const int blocksize = BLOWFISH_BLOCKSIZE;
862 0 : const int context_size = sizeof(BLOWFISH_context);
863 :
864 0 : return _gcry_selftest_helper_cbc("BLOWFISH", &bf_setkey,
865 : &encrypt_block, &_gcry_blowfish_cbc_dec, nblocks, blocksize,
866 : context_size);
867 : }
868 :
869 :
870 : /* Run the self-tests for BLOWFISH-CFB, tests bulk CBC decryption.
871 : Returns NULL on success. */
872 : static const char *
873 0 : selftest_cfb (void)
874 : {
875 0 : const int nblocks = 4+2;
876 0 : const int blocksize = BLOWFISH_BLOCKSIZE;
877 0 : const int context_size = sizeof(BLOWFISH_context);
878 :
879 0 : return _gcry_selftest_helper_cfb("BLOWFISH", &bf_setkey,
880 : &encrypt_block, &_gcry_blowfish_cfb_dec, nblocks, blocksize,
881 : context_size);
882 : }
883 :
884 :
885 : static const char*
886 0 : selftest(void)
887 : {
888 : BLOWFISH_context c;
889 0 : byte plain[] = "BLOWFISH";
890 : byte buffer[8];
891 : static const byte plain3[] =
892 : { 0xFE, 0xDC, 0xBA, 0x98, 0x76, 0x54, 0x32, 0x10 };
893 : static const byte key3[] =
894 : { 0x41, 0x79, 0x6E, 0xA0, 0x52, 0x61, 0x6E, 0xE4 };
895 : static const byte cipher3[] =
896 : { 0xE1, 0x13, 0xF4, 0x10, 0x2C, 0xFC, 0xCE, 0x43 };
897 : const char *r;
898 :
899 0 : bf_setkey( (void *) &c,
900 : (const unsigned char*)"abcdefghijklmnopqrstuvwxyz", 26 );
901 0 : encrypt_block( (void *) &c, buffer, plain );
902 0 : if( memcmp( buffer, "\x32\x4E\xD0\xFE\xF4\x13\xA2\x03", 8 ) )
903 0 : return "Blowfish selftest failed (1).";
904 0 : decrypt_block( (void *) &c, buffer, buffer );
905 0 : if( memcmp( buffer, plain, 8 ) )
906 0 : return "Blowfish selftest failed (2).";
907 :
908 0 : bf_setkey( (void *) &c, key3, 8 );
909 0 : encrypt_block( (void *) &c, buffer, plain3 );
910 0 : if( memcmp( buffer, cipher3, 8 ) )
911 0 : return "Blowfish selftest failed (3).";
912 0 : decrypt_block( (void *) &c, buffer, buffer );
913 0 : if( memcmp( buffer, plain3, 8 ) )
914 0 : return "Blowfish selftest failed (4).";
915 :
916 0 : if ( (r = selftest_cbc ()) )
917 0 : return r;
918 :
919 0 : if ( (r = selftest_cfb ()) )
920 0 : return r;
921 :
922 0 : if ( (r = selftest_ctr ()) )
923 0 : return r;
924 :
925 0 : return NULL;
926 : }
927 :
928 :
929 : struct hashset_elem {
930 : u32 val;
931 : short nidx;
932 : char used;
933 : };
934 :
935 : static inline byte
936 0 : val_to_hidx(u32 val)
937 : {
938 : /* bf sboxes are quite random already. */
939 0 : return (val >> 24) ^ (val >> 16) ^ (val >> 8) ^ val;
940 : }
941 :
942 : static inline int
943 0 : add_val(struct hashset_elem hset[256], u32 val, int *midx,
944 : struct hashset_elem *mpool)
945 : {
946 : struct hashset_elem *elem;
947 : byte hidx;
948 :
949 0 : hidx = val_to_hidx(val);
950 0 : elem = &hset[hidx];
951 :
952 : /* Check if first is in use. */
953 0 : if (elem->used == 0)
954 : {
955 0 : elem->val = val;
956 0 : elem->nidx = -1;
957 0 : elem->used = 1;
958 0 : return 0;
959 : }
960 :
961 : /* Check if first matches. */
962 0 : if (elem->val == val)
963 0 : return 1;
964 :
965 0 : for (; elem->nidx >= 0; elem = &mpool[elem->nidx])
966 : {
967 : /* Check if elem matches. */
968 0 : if (elem->val == val)
969 0 : return 1;
970 : }
971 :
972 0 : elem->nidx = (*midx)++;
973 0 : elem = &mpool[elem->nidx];
974 :
975 0 : elem->val = val;
976 0 : elem->nidx = -1;
977 0 : elem->used = 1;
978 :
979 0 : return 0;
980 : }
981 :
982 : static gcry_err_code_t
983 0 : do_bf_setkey (BLOWFISH_context *c, const byte *key, unsigned keylen)
984 : {
985 : struct hashset_elem mempool[4 * 255]; /* Enough entries for the worst case. */
986 : struct hashset_elem hset[4][256];
987 0 : int memidx = 0;
988 0 : int weak = 0;
989 : int i, j, ret;
990 : u32 data, datal, datar;
991 : static int initialized;
992 : static const char *selftest_failed;
993 :
994 0 : if( !initialized )
995 : {
996 0 : initialized = 1;
997 0 : selftest_failed = selftest();
998 0 : if( selftest_failed )
999 0 : log_error ("%s\n", selftest_failed );
1000 : }
1001 0 : if( selftest_failed )
1002 0 : return GPG_ERR_SELFTEST_FAILED;
1003 :
1004 0 : memset(hset, 0, sizeof(hset));
1005 :
1006 0 : for(i=0; i < BLOWFISH_ROUNDS+2; i++ )
1007 0 : c->p[i] = ps[i];
1008 0 : for(i=0; i < 256; i++ )
1009 : {
1010 0 : c->s0[i] = ks0[i];
1011 0 : c->s1[i] = ks1[i];
1012 0 : c->s2[i] = ks2[i];
1013 0 : c->s3[i] = ks3[i];
1014 : }
1015 :
1016 0 : for(i=j=0; i < BLOWFISH_ROUNDS+2; i++ )
1017 : {
1018 0 : data = ((u32)key[j] << 24) |
1019 0 : ((u32)key[(j+1)%keylen] << 16) |
1020 0 : ((u32)key[(j+2)%keylen] << 8) |
1021 0 : ((u32)key[(j+3)%keylen]);
1022 0 : c->p[i] ^= data;
1023 0 : j = (j+4) % keylen;
1024 : }
1025 :
1026 0 : datal = datar = 0;
1027 0 : for(i=0; i < BLOWFISH_ROUNDS+2; i += 2 )
1028 : {
1029 0 : do_encrypt( c, &datal, &datar );
1030 0 : c->p[i] = datal;
1031 0 : c->p[i+1] = datar;
1032 : }
1033 0 : for(i=0; i < 256; i += 2 )
1034 : {
1035 0 : do_encrypt( c, &datal, &datar );
1036 0 : c->s0[i] = datal;
1037 0 : c->s0[i+1] = datar;
1038 :
1039 : /* Add values to hashset, detect duplicates (weak keys). */
1040 0 : ret = add_val (hset[0], datal, &memidx, mempool);
1041 0 : weak = ret ? 1 : weak;
1042 0 : ret = add_val (hset[0], datar, &memidx, mempool);
1043 0 : weak = ret ? 1 : weak;
1044 : }
1045 0 : for(i=0; i < 256; i += 2 )
1046 : {
1047 0 : do_encrypt( c, &datal, &datar );
1048 0 : c->s1[i] = datal;
1049 0 : c->s1[i+1] = datar;
1050 :
1051 : /* Add values to hashset, detect duplicates (weak keys). */
1052 0 : ret = add_val (hset[1], datal, &memidx, mempool);
1053 0 : weak = ret ? 1 : weak;
1054 0 : ret = add_val (hset[1], datar, &memidx, mempool);
1055 0 : weak = ret ? 1 : weak;
1056 : }
1057 0 : for(i=0; i < 256; i += 2 )
1058 : {
1059 0 : do_encrypt( c, &datal, &datar );
1060 0 : c->s2[i] = datal;
1061 0 : c->s2[i+1] = datar;
1062 :
1063 : /* Add values to hashset, detect duplicates (weak keys). */
1064 0 : ret = add_val (hset[2], datal, &memidx, mempool);
1065 0 : weak = ret ? 1 : weak;
1066 0 : ret = add_val (hset[2], datar, &memidx, mempool);
1067 0 : weak = ret ? 1 : weak;
1068 : }
1069 0 : for(i=0; i < 256; i += 2 )
1070 : {
1071 0 : do_encrypt( c, &datal, &datar );
1072 0 : c->s3[i] = datal;
1073 0 : c->s3[i+1] = datar;
1074 :
1075 : /* Add values to hashset, detect duplicates (weak keys). */
1076 0 : ret = add_val (hset[3], datal, &memidx, mempool);
1077 0 : weak = ret ? 1 : weak;
1078 0 : ret = add_val (hset[3], datar, &memidx, mempool);
1079 0 : weak = ret ? 1 : weak;
1080 : }
1081 :
1082 : /* Clear stack. */
1083 0 : wipememory(hset, sizeof(hset));
1084 0 : wipememory(mempool, sizeof(mempool[0]) * memidx);
1085 :
1086 0 : _gcry_burn_stack (64);
1087 :
1088 : /* Check for weak key. A weak key is a key in which a value in
1089 : the P-array (here c) occurs more than once per table. */
1090 0 : if (weak)
1091 0 : return GPG_ERR_WEAK_KEY;
1092 :
1093 0 : return GPG_ERR_NO_ERROR;
1094 : }
1095 :
1096 :
1097 : static gcry_err_code_t
1098 0 : bf_setkey (void *context, const byte *key, unsigned keylen)
1099 : {
1100 0 : BLOWFISH_context *c = (BLOWFISH_context *) context;
1101 0 : gcry_err_code_t rc = do_bf_setkey (c, key, keylen);
1102 0 : return rc;
1103 : }
1104 :
1105 :
1106 : gcry_cipher_spec_t _gcry_cipher_spec_blowfish =
1107 : {
1108 : GCRY_CIPHER_BLOWFISH, {0, 0},
1109 : "BLOWFISH", NULL, NULL, BLOWFISH_BLOCKSIZE, 128,
1110 : sizeof (BLOWFISH_context),
1111 : bf_setkey, encrypt_block, decrypt_block
1112 : };
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