Use correct blocksize of 32 bytes for GOSTR3411-94 HMAC
[libgcrypt.git] / cipher / blowfish.c
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     (BLOWFISH_ROUNDS == 16)
50 # define USE_AMD64_ASM 1
51 #endif
52
53 /* USE_ARM_ASM indicates whether to use ARM assembly code. */
54 #undef USE_ARM_ASM
55 #if defined(__ARMEL__)
56 # if (BLOWFISH_ROUNDS == 16) && defined(HAVE_COMPATIBLE_GCC_ARM_PLATFORM_AS)
57 #  define USE_ARM_ASM 1
58 # endif
59 #endif
60
61 typedef struct {
62     u32 s0[256];
63     u32 s1[256];
64     u32 s2[256];
65     u32 s3[256];
66     u32 p[BLOWFISH_ROUNDS+2];
67 } BLOWFISH_context;
68
69 static gcry_err_code_t bf_setkey (void *c, const byte *key, unsigned keylen);
70 static unsigned int encrypt_block (void *bc, byte *outbuf, const byte *inbuf);
71 static unsigned int decrypt_block (void *bc, byte *outbuf, const byte *inbuf);
72
73
74 /* precomputed S boxes */
75 static const u32 ks0[256] = {
76     0xD1310BA6,0x98DFB5AC,0x2FFD72DB,0xD01ADFB7,0xB8E1AFED,0x6A267E96,
77     0xBA7C9045,0xF12C7F99,0x24A19947,0xB3916CF7,0x0801F2E2,0x858EFC16,
78     0x636920D8,0x71574E69,0xA458FEA3,0xF4933D7E,0x0D95748F,0x728EB658,
79     0x718BCD58,0x82154AEE,0x7B54A41D,0xC25A59B5,0x9C30D539,0x2AF26013,
80     0xC5D1B023,0x286085F0,0xCA417918,0xB8DB38EF,0x8E79DCB0,0x603A180E,
81     0x6C9E0E8B,0xB01E8A3E,0xD71577C1,0xBD314B27,0x78AF2FDA,0x55605C60,
82     0xE65525F3,0xAA55AB94,0x57489862,0x63E81440,0x55CA396A,0x2AAB10B6,
83     0xB4CC5C34,0x1141E8CE,0xA15486AF,0x7C72E993,0xB3EE1411,0x636FBC2A,
84     0x2BA9C55D,0x741831F6,0xCE5C3E16,0x9B87931E,0xAFD6BA33,0x6C24CF5C,
85     0x7A325381,0x28958677,0x3B8F4898,0x6B4BB9AF,0xC4BFE81B,0x66282193,
86     0x61D809CC,0xFB21A991,0x487CAC60,0x5DEC8032,0xEF845D5D,0xE98575B1,
87     0xDC262302,0xEB651B88,0x23893E81,0xD396ACC5,0x0F6D6FF3,0x83F44239,
88     0x2E0B4482,0xA4842004,0x69C8F04A,0x9E1F9B5E,0x21C66842,0xF6E96C9A,
89     0x670C9C61,0xABD388F0,0x6A51A0D2,0xD8542F68,0x960FA728,0xAB5133A3,
90     0x6EEF0B6C,0x137A3BE4,0xBA3BF050,0x7EFB2A98,0xA1F1651D,0x39AF0176,
91     0x66CA593E,0x82430E88,0x8CEE8619,0x456F9FB4,0x7D84A5C3,0x3B8B5EBE,
92     0xE06F75D8,0x85C12073,0x401A449F,0x56C16AA6,0x4ED3AA62,0x363F7706,
93     0x1BFEDF72,0x429B023D,0x37D0D724,0xD00A1248,0xDB0FEAD3,0x49F1C09B,
94     0x075372C9,0x80991B7B,0x25D479D8,0xF6E8DEF7,0xE3FE501A,0xB6794C3B,
95     0x976CE0BD,0x04C006BA,0xC1A94FB6,0x409F60C4,0x5E5C9EC2,0x196A2463,
96     0x68FB6FAF,0x3E6C53B5,0x1339B2EB,0x3B52EC6F,0x6DFC511F,0x9B30952C,
97     0xCC814544,0xAF5EBD09,0xBEE3D004,0xDE334AFD,0x660F2807,0x192E4BB3,
98     0xC0CBA857,0x45C8740F,0xD20B5F39,0xB9D3FBDB,0x5579C0BD,0x1A60320A,
99     0xD6A100C6,0x402C7279,0x679F25FE,0xFB1FA3CC,0x8EA5E9F8,0xDB3222F8,
100     0x3C7516DF,0xFD616B15,0x2F501EC8,0xAD0552AB,0x323DB5FA,0xFD238760,
101     0x53317B48,0x3E00DF82,0x9E5C57BB,0xCA6F8CA0,0x1A87562E,0xDF1769DB,
102     0xD542A8F6,0x287EFFC3,0xAC6732C6,0x8C4F5573,0x695B27B0,0xBBCA58C8,
103     0xE1FFA35D,0xB8F011A0,0x10FA3D98,0xFD2183B8,0x4AFCB56C,0x2DD1D35B,
104     0x9A53E479,0xB6F84565,0xD28E49BC,0x4BFB9790,0xE1DDF2DA,0xA4CB7E33,
105     0x62FB1341,0xCEE4C6E8,0xEF20CADA,0x36774C01,0xD07E9EFE,0x2BF11FB4,
106     0x95DBDA4D,0xAE909198,0xEAAD8E71,0x6B93D5A0,0xD08ED1D0,0xAFC725E0,
107     0x8E3C5B2F,0x8E7594B7,0x8FF6E2FB,0xF2122B64,0x8888B812,0x900DF01C,
108     0x4FAD5EA0,0x688FC31C,0xD1CFF191,0xB3A8C1AD,0x2F2F2218,0xBE0E1777,
109     0xEA752DFE,0x8B021FA1,0xE5A0CC0F,0xB56F74E8,0x18ACF3D6,0xCE89E299,
110     0xB4A84FE0,0xFD13E0B7,0x7CC43B81,0xD2ADA8D9,0x165FA266,0x80957705,
111     0x93CC7314,0x211A1477,0xE6AD2065,0x77B5FA86,0xC75442F5,0xFB9D35CF,
112     0xEBCDAF0C,0x7B3E89A0,0xD6411BD3,0xAE1E7E49,0x00250E2D,0x2071B35E,
113     0x226800BB,0x57B8E0AF,0x2464369B,0xF009B91E,0x5563911D,0x59DFA6AA,
114     0x78C14389,0xD95A537F,0x207D5BA2,0x02E5B9C5,0x83260376,0x6295CFA9,
115     0x11C81968,0x4E734A41,0xB3472DCA,0x7B14A94A,0x1B510052,0x9A532915,
116     0xD60F573F,0xBC9BC6E4,0x2B60A476,0x81E67400,0x08BA6FB5,0x571BE91F,
117     0xF296EC6B,0x2A0DD915,0xB6636521,0xE7B9F9B6,0xFF34052E,0xC5855664,
118     0x53B02D5D,0xA99F8FA1,0x08BA4799,0x6E85076A };
119
120 static const u32 ks1[256] = {
121     0x4B7A70E9,0xB5B32944,0xDB75092E,0xC4192623,0xAD6EA6B0,0x49A7DF7D,
122     0x9CEE60B8,0x8FEDB266,0xECAA8C71,0x699A17FF,0x5664526C,0xC2B19EE1,
123     0x193602A5,0x75094C29,0xA0591340,0xE4183A3E,0x3F54989A,0x5B429D65,
124     0x6B8FE4D6,0x99F73FD6,0xA1D29C07,0xEFE830F5,0x4D2D38E6,0xF0255DC1,
125     0x4CDD2086,0x8470EB26,0x6382E9C6,0x021ECC5E,0x09686B3F,0x3EBAEFC9,
126     0x3C971814,0x6B6A70A1,0x687F3584,0x52A0E286,0xB79C5305,0xAA500737,
127     0x3E07841C,0x7FDEAE5C,0x8E7D44EC,0x5716F2B8,0xB03ADA37,0xF0500C0D,
128     0xF01C1F04,0x0200B3FF,0xAE0CF51A,0x3CB574B2,0x25837A58,0xDC0921BD,
129     0xD19113F9,0x7CA92FF6,0x94324773,0x22F54701,0x3AE5E581,0x37C2DADC,
130     0xC8B57634,0x9AF3DDA7,0xA9446146,0x0FD0030E,0xECC8C73E,0xA4751E41,
131     0xE238CD99,0x3BEA0E2F,0x3280BBA1,0x183EB331,0x4E548B38,0x4F6DB908,
132     0x6F420D03,0xF60A04BF,0x2CB81290,0x24977C79,0x5679B072,0xBCAF89AF,
133     0xDE9A771F,0xD9930810,0xB38BAE12,0xDCCF3F2E,0x5512721F,0x2E6B7124,
134     0x501ADDE6,0x9F84CD87,0x7A584718,0x7408DA17,0xBC9F9ABC,0xE94B7D8C,
135     0xEC7AEC3A,0xDB851DFA,0x63094366,0xC464C3D2,0xEF1C1847,0x3215D908,
136     0xDD433B37,0x24C2BA16,0x12A14D43,0x2A65C451,0x50940002,0x133AE4DD,
137     0x71DFF89E,0x10314E55,0x81AC77D6,0x5F11199B,0x043556F1,0xD7A3C76B,
138     0x3C11183B,0x5924A509,0xF28FE6ED,0x97F1FBFA,0x9EBABF2C,0x1E153C6E,
139     0x86E34570,0xEAE96FB1,0x860E5E0A,0x5A3E2AB3,0x771FE71C,0x4E3D06FA,
140     0x2965DCB9,0x99E71D0F,0x803E89D6,0x5266C825,0x2E4CC978,0x9C10B36A,
141     0xC6150EBA,0x94E2EA78,0xA5FC3C53,0x1E0A2DF4,0xF2F74EA7,0x361D2B3D,
142     0x1939260F,0x19C27960,0x5223A708,0xF71312B6,0xEBADFE6E,0xEAC31F66,
143     0xE3BC4595,0xA67BC883,0xB17F37D1,0x018CFF28,0xC332DDEF,0xBE6C5AA5,
144     0x65582185,0x68AB9802,0xEECEA50F,0xDB2F953B,0x2AEF7DAD,0x5B6E2F84,
145     0x1521B628,0x29076170,0xECDD4775,0x619F1510,0x13CCA830,0xEB61BD96,
146     0x0334FE1E,0xAA0363CF,0xB5735C90,0x4C70A239,0xD59E9E0B,0xCBAADE14,
147     0xEECC86BC,0x60622CA7,0x9CAB5CAB,0xB2F3846E,0x648B1EAF,0x19BDF0CA,
148     0xA02369B9,0x655ABB50,0x40685A32,0x3C2AB4B3,0x319EE9D5,0xC021B8F7,
149     0x9B540B19,0x875FA099,0x95F7997E,0x623D7DA8,0xF837889A,0x97E32D77,
150     0x11ED935F,0x16681281,0x0E358829,0xC7E61FD6,0x96DEDFA1,0x7858BA99,
151     0x57F584A5,0x1B227263,0x9B83C3FF,0x1AC24696,0xCDB30AEB,0x532E3054,
152     0x8FD948E4,0x6DBC3128,0x58EBF2EF,0x34C6FFEA,0xFE28ED61,0xEE7C3C73,
153     0x5D4A14D9,0xE864B7E3,0x42105D14,0x203E13E0,0x45EEE2B6,0xA3AAABEA,
154     0xDB6C4F15,0xFACB4FD0,0xC742F442,0xEF6ABBB5,0x654F3B1D,0x41CD2105,
155     0xD81E799E,0x86854DC7,0xE44B476A,0x3D816250,0xCF62A1F2,0x5B8D2646,
156     0xFC8883A0,0xC1C7B6A3,0x7F1524C3,0x69CB7492,0x47848A0B,0x5692B285,
157     0x095BBF00,0xAD19489D,0x1462B174,0x23820E00,0x58428D2A,0x0C55F5EA,
158     0x1DADF43E,0x233F7061,0x3372F092,0x8D937E41,0xD65FECF1,0x6C223BDB,
159     0x7CDE3759,0xCBEE7460,0x4085F2A7,0xCE77326E,0xA6078084,0x19F8509E,
160     0xE8EFD855,0x61D99735,0xA969A7AA,0xC50C06C2,0x5A04ABFC,0x800BCADC,
161     0x9E447A2E,0xC3453484,0xFDD56705,0x0E1E9EC9,0xDB73DBD3,0x105588CD,
162     0x675FDA79,0xE3674340,0xC5C43465,0x713E38D8,0x3D28F89E,0xF16DFF20,
163     0x153E21E7,0x8FB03D4A,0xE6E39F2B,0xDB83ADF7 };
164
165 static const u32 ks2[256] = {
166     0xE93D5A68,0x948140F7,0xF64C261C,0x94692934,0x411520F7,0x7602D4F7,
167     0xBCF46B2E,0xD4A20068,0xD4082471,0x3320F46A,0x43B7D4B7,0x500061AF,
168     0x1E39F62E,0x97244546,0x14214F74,0xBF8B8840,0x4D95FC1D,0x96B591AF,
169     0x70F4DDD3,0x66A02F45,0xBFBC09EC,0x03BD9785,0x7FAC6DD0,0x31CB8504,
170     0x96EB27B3,0x55FD3941,0xDA2547E6,0xABCA0A9A,0x28507825,0x530429F4,
171     0x0A2C86DA,0xE9B66DFB,0x68DC1462,0xD7486900,0x680EC0A4,0x27A18DEE,
172     0x4F3FFEA2,0xE887AD8C,0xB58CE006,0x7AF4D6B6,0xAACE1E7C,0xD3375FEC,
173     0xCE78A399,0x406B2A42,0x20FE9E35,0xD9F385B9,0xEE39D7AB,0x3B124E8B,
174     0x1DC9FAF7,0x4B6D1856,0x26A36631,0xEAE397B2,0x3A6EFA74,0xDD5B4332,
175     0x6841E7F7,0xCA7820FB,0xFB0AF54E,0xD8FEB397,0x454056AC,0xBA489527,
176     0x55533A3A,0x20838D87,0xFE6BA9B7,0xD096954B,0x55A867BC,0xA1159A58,
177     0xCCA92963,0x99E1DB33,0xA62A4A56,0x3F3125F9,0x5EF47E1C,0x9029317C,
178     0xFDF8E802,0x04272F70,0x80BB155C,0x05282CE3,0x95C11548,0xE4C66D22,
179     0x48C1133F,0xC70F86DC,0x07F9C9EE,0x41041F0F,0x404779A4,0x5D886E17,
180     0x325F51EB,0xD59BC0D1,0xF2BCC18F,0x41113564,0x257B7834,0x602A9C60,
181     0xDFF8E8A3,0x1F636C1B,0x0E12B4C2,0x02E1329E,0xAF664FD1,0xCAD18115,
182     0x6B2395E0,0x333E92E1,0x3B240B62,0xEEBEB922,0x85B2A20E,0xE6BA0D99,
183     0xDE720C8C,0x2DA2F728,0xD0127845,0x95B794FD,0x647D0862,0xE7CCF5F0,
184     0x5449A36F,0x877D48FA,0xC39DFD27,0xF33E8D1E,0x0A476341,0x992EFF74,
185     0x3A6F6EAB,0xF4F8FD37,0xA812DC60,0xA1EBDDF8,0x991BE14C,0xDB6E6B0D,
186     0xC67B5510,0x6D672C37,0x2765D43B,0xDCD0E804,0xF1290DC7,0xCC00FFA3,
187     0xB5390F92,0x690FED0B,0x667B9FFB,0xCEDB7D9C,0xA091CF0B,0xD9155EA3,
188     0xBB132F88,0x515BAD24,0x7B9479BF,0x763BD6EB,0x37392EB3,0xCC115979,
189     0x8026E297,0xF42E312D,0x6842ADA7,0xC66A2B3B,0x12754CCC,0x782EF11C,
190     0x6A124237,0xB79251E7,0x06A1BBE6,0x4BFB6350,0x1A6B1018,0x11CAEDFA,
191     0x3D25BDD8,0xE2E1C3C9,0x44421659,0x0A121386,0xD90CEC6E,0xD5ABEA2A,
192     0x64AF674E,0xDA86A85F,0xBEBFE988,0x64E4C3FE,0x9DBC8057,0xF0F7C086,
193     0x60787BF8,0x6003604D,0xD1FD8346,0xF6381FB0,0x7745AE04,0xD736FCCC,
194     0x83426B33,0xF01EAB71,0xB0804187,0x3C005E5F,0x77A057BE,0xBDE8AE24,
195     0x55464299,0xBF582E61,0x4E58F48F,0xF2DDFDA2,0xF474EF38,0x8789BDC2,
196     0x5366F9C3,0xC8B38E74,0xB475F255,0x46FCD9B9,0x7AEB2661,0x8B1DDF84,
197     0x846A0E79,0x915F95E2,0x466E598E,0x20B45770,0x8CD55591,0xC902DE4C,
198     0xB90BACE1,0xBB8205D0,0x11A86248,0x7574A99E,0xB77F19B6,0xE0A9DC09,
199     0x662D09A1,0xC4324633,0xE85A1F02,0x09F0BE8C,0x4A99A025,0x1D6EFE10,
200     0x1AB93D1D,0x0BA5A4DF,0xA186F20F,0x2868F169,0xDCB7DA83,0x573906FE,
201     0xA1E2CE9B,0x4FCD7F52,0x50115E01,0xA70683FA,0xA002B5C4,0x0DE6D027,
202     0x9AF88C27,0x773F8641,0xC3604C06,0x61A806B5,0xF0177A28,0xC0F586E0,
203     0x006058AA,0x30DC7D62,0x11E69ED7,0x2338EA63,0x53C2DD94,0xC2C21634,
204     0xBBCBEE56,0x90BCB6DE,0xEBFC7DA1,0xCE591D76,0x6F05E409,0x4B7C0188,
205     0x39720A3D,0x7C927C24,0x86E3725F,0x724D9DB9,0x1AC15BB4,0xD39EB8FC,
206     0xED545578,0x08FCA5B5,0xD83D7CD3,0x4DAD0FC4,0x1E50EF5E,0xB161E6F8,
207     0xA28514D9,0x6C51133C,0x6FD5C7E7,0x56E14EC4,0x362ABFCE,0xDDC6C837,
208     0xD79A3234,0x92638212,0x670EFA8E,0x406000E0 };
209
210 static const u32 ks3[256] = {
211     0x3A39CE37,0xD3FAF5CF,0xABC27737,0x5AC52D1B,0x5CB0679E,0x4FA33742,
212     0xD3822740,0x99BC9BBE,0xD5118E9D,0xBF0F7315,0xD62D1C7E,0xC700C47B,
213     0xB78C1B6B,0x21A19045,0xB26EB1BE,0x6A366EB4,0x5748AB2F,0xBC946E79,
214     0xC6A376D2,0x6549C2C8,0x530FF8EE,0x468DDE7D,0xD5730A1D,0x4CD04DC6,
215     0x2939BBDB,0xA9BA4650,0xAC9526E8,0xBE5EE304,0xA1FAD5F0,0x6A2D519A,
216     0x63EF8CE2,0x9A86EE22,0xC089C2B8,0x43242EF6,0xA51E03AA,0x9CF2D0A4,
217     0x83C061BA,0x9BE96A4D,0x8FE51550,0xBA645BD6,0x2826A2F9,0xA73A3AE1,
218     0x4BA99586,0xEF5562E9,0xC72FEFD3,0xF752F7DA,0x3F046F69,0x77FA0A59,
219     0x80E4A915,0x87B08601,0x9B09E6AD,0x3B3EE593,0xE990FD5A,0x9E34D797,
220     0x2CF0B7D9,0x022B8B51,0x96D5AC3A,0x017DA67D,0xD1CF3ED6,0x7C7D2D28,
221     0x1F9F25CF,0xADF2B89B,0x5AD6B472,0x5A88F54C,0xE029AC71,0xE019A5E6,
222     0x47B0ACFD,0xED93FA9B,0xE8D3C48D,0x283B57CC,0xF8D56629,0x79132E28,
223     0x785F0191,0xED756055,0xF7960E44,0xE3D35E8C,0x15056DD4,0x88F46DBA,
224     0x03A16125,0x0564F0BD,0xC3EB9E15,0x3C9057A2,0x97271AEC,0xA93A072A,
225     0x1B3F6D9B,0x1E6321F5,0xF59C66FB,0x26DCF319,0x7533D928,0xB155FDF5,
226     0x03563482,0x8ABA3CBB,0x28517711,0xC20AD9F8,0xABCC5167,0xCCAD925F,
227     0x4DE81751,0x3830DC8E,0x379D5862,0x9320F991,0xEA7A90C2,0xFB3E7BCE,
228     0x5121CE64,0x774FBE32,0xA8B6E37E,0xC3293D46,0x48DE5369,0x6413E680,
229     0xA2AE0810,0xDD6DB224,0x69852DFD,0x09072166,0xB39A460A,0x6445C0DD,
230     0x586CDECF,0x1C20C8AE,0x5BBEF7DD,0x1B588D40,0xCCD2017F,0x6BB4E3BB,
231     0xDDA26A7E,0x3A59FF45,0x3E350A44,0xBCB4CDD5,0x72EACEA8,0xFA6484BB,
232     0x8D6612AE,0xBF3C6F47,0xD29BE463,0x542F5D9E,0xAEC2771B,0xF64E6370,
233     0x740E0D8D,0xE75B1357,0xF8721671,0xAF537D5D,0x4040CB08,0x4EB4E2CC,
234     0x34D2466A,0x0115AF84,0xE1B00428,0x95983A1D,0x06B89FB4,0xCE6EA048,
235     0x6F3F3B82,0x3520AB82,0x011A1D4B,0x277227F8,0x611560B1,0xE7933FDC,
236     0xBB3A792B,0x344525BD,0xA08839E1,0x51CE794B,0x2F32C9B7,0xA01FBAC9,
237     0xE01CC87E,0xBCC7D1F6,0xCF0111C3,0xA1E8AAC7,0x1A908749,0xD44FBD9A,
238     0xD0DADECB,0xD50ADA38,0x0339C32A,0xC6913667,0x8DF9317C,0xE0B12B4F,
239     0xF79E59B7,0x43F5BB3A,0xF2D519FF,0x27D9459C,0xBF97222C,0x15E6FC2A,
240     0x0F91FC71,0x9B941525,0xFAE59361,0xCEB69CEB,0xC2A86459,0x12BAA8D1,
241     0xB6C1075E,0xE3056A0C,0x10D25065,0xCB03A442,0xE0EC6E0E,0x1698DB3B,
242     0x4C98A0BE,0x3278E964,0x9F1F9532,0xE0D392DF,0xD3A0342B,0x8971F21E,
243     0x1B0A7441,0x4BA3348C,0xC5BE7120,0xC37632D8,0xDF359F8D,0x9B992F2E,
244     0xE60B6F47,0x0FE3F11D,0xE54CDA54,0x1EDAD891,0xCE6279CF,0xCD3E7E6F,
245     0x1618B166,0xFD2C1D05,0x848FD2C5,0xF6FB2299,0xF523F357,0xA6327623,
246     0x93A83531,0x56CCCD02,0xACF08162,0x5A75EBB5,0x6E163697,0x88D273CC,
247     0xDE966292,0x81B949D0,0x4C50901B,0x71C65614,0xE6C6C7BD,0x327A140A,
248     0x45E1D006,0xC3F27B9A,0xC9AA53FD,0x62A80F00,0xBB25BFE2,0x35BDD2F6,
249     0x71126905,0xB2040222,0xB6CBCF7C,0xCD769C2B,0x53113EC0,0x1640E3D3,
250     0x38ABBD60,0x2547ADF0,0xBA38209C,0xF746CE76,0x77AFA1C5,0x20756060,
251     0x85CBFE4E,0x8AE88DD8,0x7AAAF9B0,0x4CF9AA7E,0x1948C25C,0x02FB8A8C,
252     0x01C36AE4,0xD6EBE1F9,0x90D4F869,0xA65CDEA0,0x3F09252D,0xC208E69F,
253     0xB74E6132,0xCE77E25B,0x578FDFE3,0x3AC372E6 };
254
255 static const u32 ps[BLOWFISH_ROUNDS+2] = {
256     0x243F6A88,0x85A308D3,0x13198A2E,0x03707344,0xA4093822,0x299F31D0,
257     0x082EFA98,0xEC4E6C89,0x452821E6,0x38D01377,0xBE5466CF,0x34E90C6C,
258     0xC0AC29B7,0xC97C50DD,0x3F84D5B5,0xB5470917,0x9216D5D9,0x8979FB1B };
259
260
261 #ifdef USE_AMD64_ASM
262
263 /* Assembly implementations of Blowfish. */
264 extern void _gcry_blowfish_amd64_do_encrypt(BLOWFISH_context *c, u32 *ret_xl,
265                                             u32 *ret_xr);
266
267 extern void _gcry_blowfish_amd64_encrypt_block(BLOWFISH_context *c, byte *out,
268                                                const byte *in);
269
270 extern void _gcry_blowfish_amd64_decrypt_block(BLOWFISH_context *c, byte *out,
271                                                const byte *in);
272
273 /* These assembly implementations process four blocks in parallel. */
274 extern void _gcry_blowfish_amd64_ctr_enc(BLOWFISH_context *ctx, byte *out,
275                                          const byte *in, byte *ctr);
276
277 extern void _gcry_blowfish_amd64_cbc_dec(BLOWFISH_context *ctx, byte *out,
278                                          const byte *in, byte *iv);
279
280 extern void _gcry_blowfish_amd64_cfb_dec(BLOWFISH_context *ctx, byte *out,
281                                          const byte *in, byte *iv);
282
283 static void
284 do_encrypt ( BLOWFISH_context *bc, u32 *ret_xl, u32 *ret_xr )
285 {
286   _gcry_blowfish_amd64_do_encrypt (bc, ret_xl, ret_xr);
287 }
288
289 static void
290 do_encrypt_block (BLOWFISH_context *context, byte *outbuf, const byte *inbuf)
291 {
292   _gcry_blowfish_amd64_encrypt_block (context, outbuf, inbuf);
293 }
294
295 static void
296 do_decrypt_block (BLOWFISH_context *context, byte *outbuf, const byte *inbuf)
297 {
298   _gcry_blowfish_amd64_decrypt_block (context, outbuf, inbuf);
299 }
300
301 static unsigned int
302 encrypt_block (void *context , byte *outbuf, const byte *inbuf)
303 {
304   BLOWFISH_context *c = (BLOWFISH_context *) context;
305   do_encrypt_block (c, outbuf, inbuf);
306   return /*burn_stack*/ (2*8);
307 }
308
309 static unsigned int
310 decrypt_block (void *context, byte *outbuf, const byte *inbuf)
311 {
312   BLOWFISH_context *c = (BLOWFISH_context *) context;
313   do_decrypt_block (c, outbuf, inbuf);
314   return /*burn_stack*/ (2*8);
315 }
316
317 #elif defined(USE_ARM_ASM)
318
319 /* Assembly implementations of Blowfish. */
320 extern void _gcry_blowfish_arm_do_encrypt(BLOWFISH_context *c, u32 *ret_xl,
321                                             u32 *ret_xr);
322
323 extern void _gcry_blowfish_arm_encrypt_block(BLOWFISH_context *c, byte *out,
324                                                const byte *in);
325
326 extern void _gcry_blowfish_arm_decrypt_block(BLOWFISH_context *c, byte *out,
327                                                const byte *in);
328
329 /* These assembly implementations process two blocks in parallel. */
330 extern void _gcry_blowfish_arm_ctr_enc(BLOWFISH_context *ctx, byte *out,
331                                          const byte *in, byte *ctr);
332
333 extern void _gcry_blowfish_arm_cbc_dec(BLOWFISH_context *ctx, byte *out,
334                                          const byte *in, byte *iv);
335
336 extern void _gcry_blowfish_arm_cfb_dec(BLOWFISH_context *ctx, byte *out,
337                                          const byte *in, byte *iv);
338
339 static void
340 do_encrypt ( BLOWFISH_context *bc, u32 *ret_xl, u32 *ret_xr )
341 {
342   _gcry_blowfish_arm_do_encrypt (bc, ret_xl, ret_xr);
343 }
344
345 static void
346 do_encrypt_block (BLOWFISH_context *context, byte *outbuf, const byte *inbuf)
347 {
348   _gcry_blowfish_arm_encrypt_block (context, outbuf, inbuf);
349 }
350
351 static void
352 do_decrypt_block (BLOWFISH_context *context, byte *outbuf, const byte *inbuf)
353 {
354   _gcry_blowfish_arm_decrypt_block (context, outbuf, inbuf);
355 }
356
357 static unsigned int
358 encrypt_block (void *context , byte *outbuf, const byte *inbuf)
359 {
360   BLOWFISH_context *c = (BLOWFISH_context *) context;
361   do_encrypt_block (c, outbuf, inbuf);
362   return /*burn_stack*/ (10*4);
363 }
364
365 static unsigned int
366 decrypt_block (void *context, byte *outbuf, const byte *inbuf)
367 {
368   BLOWFISH_context *c = (BLOWFISH_context *) context;
369   do_decrypt_block (c, outbuf, inbuf);
370   return /*burn_stack*/ (10*4);
371 }
372
373 #else /*USE_ARM_ASM*/
374
375 #if BLOWFISH_ROUNDS != 16
376 static inline u32
377 function_F( BLOWFISH_context *bc, u32 x )
378 {
379     u16 a, b, c, d;
380
381 #ifdef WORDS_BIGENDIAN
382     a = ((byte*)&x)[0];
383     b = ((byte*)&x)[1];
384     c = ((byte*)&x)[2];
385     d = ((byte*)&x)[3];
386 #else
387     a = ((byte*)&x)[3];
388     b = ((byte*)&x)[2];
389     c = ((byte*)&x)[1];
390     d = ((byte*)&x)[0];
391 #endif
392
393     return ((bc->s0[a] + bc->s1[b]) ^ bc->s2[c] ) + bc->s3[d];
394 }
395 #endif
396
397 #ifdef WORDS_BIGENDIAN
398 #define F(x) ((( s0[((byte*)&x)[0]] + s1[((byte*)&x)[1]])        \
399                    ^ s2[((byte*)&x)[2]]) + s3[((byte*)&x)[3]] )
400 #else
401 #define F(x) ((( s0[((byte*)&x)[3]] + s1[((byte*)&x)[2]])        \
402                    ^ s2[((byte*)&x)[1]]) + s3[((byte*)&x)[0]] )
403 #endif
404 #define R(l,r,i)  do { l ^= p[i]; r ^= F(l); } while(0)
405
406
407 static void
408 do_encrypt ( BLOWFISH_context *bc, u32 *ret_xl, u32 *ret_xr )
409 {
410 #if BLOWFISH_ROUNDS == 16
411   u32 xl, xr, *s0, *s1, *s2, *s3, *p;
412
413   xl = *ret_xl;
414   xr = *ret_xr;
415   p = bc->p;
416   s0 = bc->s0;
417   s1 = bc->s1;
418   s2 = bc->s2;
419   s3 = bc->s3;
420
421   R( xl, xr,    0);
422   R( xr, xl,    1);
423   R( xl, xr,    2);
424   R( xr, xl,    3);
425   R( xl, xr,    4);
426   R( xr, xl,    5);
427   R( xl, xr,    6);
428   R( xr, xl,    7);
429   R( xl, xr,    8);
430   R( xr, xl,    9);
431   R( xl, xr, 10);
432   R( xr, xl, 11);
433   R( xl, xr, 12);
434   R( xr, xl, 13);
435   R( xl, xr, 14);
436   R( xr, xl, 15);
437
438   xl ^= p[BLOWFISH_ROUNDS];
439   xr ^= p[BLOWFISH_ROUNDS+1];
440
441   *ret_xl = xr;
442   *ret_xr = xl;
443
444 #else
445   u32 xl, xr, temp, *p;
446   int i;
447
448   xl = *ret_xl;
449   xr = *ret_xr;
450   p = bc->p;
451
452   for(i=0; i < BLOWFISH_ROUNDS; i++ )
453     {
454       xl ^= p[i];
455       xr ^= function_F(bc, xl);
456       temp = xl;
457       xl = xr;
458       xr = temp;
459     }
460   temp = xl;
461   xl = xr;
462   xr = temp;
463
464   xr ^= p[BLOWFISH_ROUNDS];
465   xl ^= p[BLOWFISH_ROUNDS+1];
466
467   *ret_xl = xl;
468   *ret_xr = xr;
469 #endif
470 }
471
472
473 static void
474 decrypt ( 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, 17);
488   R( xr, xl, 16);
489   R( xl, xr, 15);
490   R( xr, xl, 14);
491   R( xl, xr, 13);
492   R( xr, xl, 12);
493   R( xl, xr, 11);
494   R( xr, xl, 10);
495   R( xl, xr,    9);
496   R( xr, xl,    8);
497   R( xl, xr,    7);
498   R( xr, xl,    6);
499   R( xl, xr,    5);
500   R( xr, xl,    4);
501   R( xl, xr,    3);
502   R( xr, xl,    2);
503
504   xl ^= p[1];
505   xr ^= p[0];
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=BLOWFISH_ROUNDS+1; i > 1; i-- )
519     {
520       xl ^= p[i];
521       xr ^= function_F(bc, xl);
522       temp = xl;
523       xl = xr;
524       xr = temp;
525     }
526
527   temp = xl;
528   xl = xr;
529   xr = temp;
530
531   xr ^= p[1];
532   xl ^= p[0];
533
534   *ret_xl = xl;
535   *ret_xr = xr;
536 #endif
537 }
538
539 #undef F
540 #undef R
541
542 static void
543 do_encrypt_block ( BLOWFISH_context *bc, byte *outbuf, const byte *inbuf )
544 {
545   u32 d1, d2;
546
547   d1 = buf_get_be32(inbuf);
548   d2 = buf_get_be32(inbuf + 4);
549   do_encrypt( bc, &d1, &d2 );
550   buf_put_be32(outbuf, d1);
551   buf_put_be32(outbuf + 4, d2);
552 }
553
554 static unsigned int
555 encrypt_block (void *context, byte *outbuf, const byte *inbuf)
556 {
557   BLOWFISH_context *bc = (BLOWFISH_context *) context;
558   do_encrypt_block (bc, outbuf, inbuf);
559   return /*burn_stack*/ (64);
560 }
561
562
563 static void
564 do_decrypt_block (BLOWFISH_context *bc, byte *outbuf, const byte *inbuf)
565 {
566   u32 d1, d2;
567
568   d1 = buf_get_be32(inbuf);
569   d2 = buf_get_be32(inbuf + 4);
570   decrypt( bc, &d1, &d2 );
571   buf_put_be32(outbuf, d1);
572   buf_put_be32(outbuf + 4, d2);
573 }
574
575 static unsigned int
576 decrypt_block (void *context, byte *outbuf, const byte *inbuf)
577 {
578   BLOWFISH_context *bc = (BLOWFISH_context *) context;
579   do_decrypt_block (bc, outbuf, inbuf);
580   return /*burn_stack*/ (64);
581 }
582
583 #endif /*!USE_AMD64_ASM&&!USE_ARM_ASM*/
584
585
586 /* Bulk encryption of complete blocks in CTR mode.  This function is only
587    intended for the bulk encryption feature of cipher.c.  CTR is expected to be
588    of size BLOWFISH_BLOCKSIZE. */
589 void
590 _gcry_blowfish_ctr_enc(void *context, unsigned char *ctr, void *outbuf_arg,
591                        const void *inbuf_arg, size_t nblocks)
592 {
593   BLOWFISH_context *ctx = context;
594   unsigned char *outbuf = outbuf_arg;
595   const unsigned char *inbuf = inbuf_arg;
596   unsigned char tmpbuf[BLOWFISH_BLOCKSIZE];
597   int burn_stack_depth = (64) + 2 * BLOWFISH_BLOCKSIZE;
598   int i;
599
600 #ifdef USE_AMD64_ASM
601   {
602     if (nblocks >= 4)
603       burn_stack_depth += 5 * sizeof(void*);
604
605     /* Process data in 4 block chunks. */
606     while (nblocks >= 4)
607       {
608         _gcry_blowfish_amd64_ctr_enc(ctx, outbuf, inbuf, ctr);
609
610         nblocks -= 4;
611         outbuf += 4 * BLOWFISH_BLOCKSIZE;
612         inbuf  += 4 * BLOWFISH_BLOCKSIZE;
613       }
614
615     /* Use generic code to handle smaller chunks... */
616     /* TODO: use caching instead? */
617   }
618 #elif defined(USE_ARM_ASM)
619   {
620     /* Process data in 2 block chunks. */
621     while (nblocks >= 2)
622       {
623         _gcry_blowfish_arm_ctr_enc(ctx, outbuf, inbuf, ctr);
624
625         nblocks -= 2;
626         outbuf += 2 * BLOWFISH_BLOCKSIZE;
627         inbuf  += 2 * BLOWFISH_BLOCKSIZE;
628       }
629
630     /* Use generic code to handle smaller chunks... */
631     /* TODO: use caching instead? */
632   }
633 #endif
634
635   for ( ;nblocks; nblocks-- )
636     {
637       /* Encrypt the counter. */
638       do_encrypt_block(ctx, tmpbuf, ctr);
639       /* XOR the input with the encrypted counter and store in output.  */
640       buf_xor(outbuf, tmpbuf, inbuf, BLOWFISH_BLOCKSIZE);
641       outbuf += BLOWFISH_BLOCKSIZE;
642       inbuf  += BLOWFISH_BLOCKSIZE;
643       /* Increment the counter.  */
644       for (i = BLOWFISH_BLOCKSIZE; i > 0; i--)
645         {
646           ctr[i-1]++;
647           if (ctr[i-1])
648             break;
649         }
650     }
651
652   wipememory(tmpbuf, sizeof(tmpbuf));
653   _gcry_burn_stack(burn_stack_depth);
654 }
655
656
657 /* Bulk decryption of complete blocks in CBC mode.  This function is only
658    intended for the bulk encryption feature of cipher.c. */
659 void
660 _gcry_blowfish_cbc_dec(void *context, unsigned char *iv, void *outbuf_arg,
661                        const void *inbuf_arg, size_t nblocks)
662 {
663   BLOWFISH_context *ctx = context;
664   unsigned char *outbuf = outbuf_arg;
665   const unsigned char *inbuf = inbuf_arg;
666   unsigned char savebuf[BLOWFISH_BLOCKSIZE];
667   int burn_stack_depth = (64) + 2 * BLOWFISH_BLOCKSIZE;
668
669 #ifdef USE_AMD64_ASM
670   {
671     if (nblocks >= 4)
672       burn_stack_depth += 5 * sizeof(void*);
673
674     /* Process data in 4 block chunks. */
675     while (nblocks >= 4)
676       {
677         _gcry_blowfish_amd64_cbc_dec(ctx, outbuf, inbuf, iv);
678
679         nblocks -= 4;
680         outbuf += 4 * BLOWFISH_BLOCKSIZE;
681         inbuf  += 4 * BLOWFISH_BLOCKSIZE;
682       }
683
684     /* Use generic code to handle smaller chunks... */
685   }
686 #elif defined(USE_ARM_ASM)
687   {
688     /* Process data in 2 block chunks. */
689     while (nblocks >= 2)
690       {
691         _gcry_blowfish_arm_cbc_dec(ctx, outbuf, inbuf, iv);
692
693         nblocks -= 2;
694         outbuf += 2 * BLOWFISH_BLOCKSIZE;
695         inbuf  += 2 * BLOWFISH_BLOCKSIZE;
696       }
697
698     /* Use generic code to handle smaller chunks... */
699   }
700 #endif
701
702   for ( ;nblocks; nblocks-- )
703     {
704       /* INBUF is needed later and it may be identical to OUTBUF, so store
705          the intermediate result to SAVEBUF.  */
706       do_decrypt_block (ctx, savebuf, inbuf);
707
708       buf_xor_n_copy_2(outbuf, savebuf, iv, inbuf, BLOWFISH_BLOCKSIZE);
709       inbuf += BLOWFISH_BLOCKSIZE;
710       outbuf += BLOWFISH_BLOCKSIZE;
711     }
712
713   wipememory(savebuf, sizeof(savebuf));
714   _gcry_burn_stack(burn_stack_depth);
715 }
716
717
718 /* Bulk decryption of complete blocks in CFB mode.  This function is only
719    intended for the bulk encryption feature of cipher.c. */
720 void
721 _gcry_blowfish_cfb_dec(void *context, unsigned char *iv, void *outbuf_arg,
722                        const void *inbuf_arg, size_t nblocks)
723 {
724   BLOWFISH_context *ctx = context;
725   unsigned char *outbuf = outbuf_arg;
726   const unsigned char *inbuf = inbuf_arg;
727   int burn_stack_depth = (64) + 2 * BLOWFISH_BLOCKSIZE;
728
729 #ifdef USE_AMD64_ASM
730   {
731     if (nblocks >= 4)
732       burn_stack_depth += 5 * sizeof(void*);
733
734     /* Process data in 4 block chunks. */
735     while (nblocks >= 4)
736       {
737         _gcry_blowfish_amd64_cfb_dec(ctx, outbuf, inbuf, iv);
738
739         nblocks -= 4;
740         outbuf += 4 * BLOWFISH_BLOCKSIZE;
741         inbuf  += 4 * BLOWFISH_BLOCKSIZE;
742       }
743
744     /* Use generic code to handle smaller chunks... */
745   }
746 #elif defined(USE_ARM_ASM)
747   {
748     /* Process data in 2 block chunks. */
749     while (nblocks >= 2)
750       {
751         _gcry_blowfish_arm_cfb_dec(ctx, outbuf, inbuf, iv);
752
753         nblocks -= 2;
754         outbuf += 2 * BLOWFISH_BLOCKSIZE;
755         inbuf  += 2 * BLOWFISH_BLOCKSIZE;
756       }
757
758     /* Use generic code to handle smaller chunks... */
759   }
760 #endif
761
762   for ( ;nblocks; nblocks-- )
763     {
764       do_encrypt_block(ctx, iv, iv);
765       buf_xor_n_copy(outbuf, iv, inbuf, BLOWFISH_BLOCKSIZE);
766       outbuf += BLOWFISH_BLOCKSIZE;
767       inbuf  += BLOWFISH_BLOCKSIZE;
768     }
769
770   _gcry_burn_stack(burn_stack_depth);
771 }
772
773
774 /* Run the self-tests for BLOWFISH-CTR, tests IV increment of bulk CTR
775    encryption.  Returns NULL on success. */
776 static const char *
777 selftest_ctr (void)
778 {
779   const int nblocks = 4+1;
780   const int blocksize = BLOWFISH_BLOCKSIZE;
781   const int context_size = sizeof(BLOWFISH_context);
782
783   return _gcry_selftest_helper_ctr("BLOWFISH", &bf_setkey,
784            &encrypt_block, &_gcry_blowfish_ctr_enc, nblocks, blocksize,
785            context_size);
786 }
787
788
789 /* Run the self-tests for BLOWFISH-CBC, tests bulk CBC decryption.
790    Returns NULL on success. */
791 static const char *
792 selftest_cbc (void)
793 {
794   const int nblocks = 4+2;
795   const int blocksize = BLOWFISH_BLOCKSIZE;
796   const int context_size = sizeof(BLOWFISH_context);
797
798   return _gcry_selftest_helper_cbc("BLOWFISH", &bf_setkey,
799            &encrypt_block, &_gcry_blowfish_cbc_dec, nblocks, blocksize,
800            context_size);
801 }
802
803
804 /* Run the self-tests for BLOWFISH-CFB, tests bulk CBC decryption.
805    Returns NULL on success. */
806 static const char *
807 selftest_cfb (void)
808 {
809   const int nblocks = 4+2;
810   const int blocksize = BLOWFISH_BLOCKSIZE;
811   const int context_size = sizeof(BLOWFISH_context);
812
813   return _gcry_selftest_helper_cfb("BLOWFISH", &bf_setkey,
814            &encrypt_block, &_gcry_blowfish_cfb_dec, nblocks, blocksize,
815            context_size);
816 }
817
818
819 static const char*
820 selftest(void)
821 {
822   BLOWFISH_context c;
823   byte plain[] = "BLOWFISH";
824   byte buffer[8];
825   static const byte plain3[] =
826     { 0xFE, 0xDC, 0xBA, 0x98, 0x76, 0x54, 0x32, 0x10 };
827   static const byte key3[] =
828     { 0x41, 0x79, 0x6E, 0xA0, 0x52, 0x61, 0x6E, 0xE4 };
829   static const byte cipher3[] =
830     { 0xE1, 0x13, 0xF4, 0x10, 0x2C, 0xFC, 0xCE, 0x43 };
831   const char *r;
832
833   bf_setkey( (void *) &c,
834              (const unsigned char*)"abcdefghijklmnopqrstuvwxyz", 26 );
835   encrypt_block( (void *) &c, buffer, plain );
836   if( memcmp( buffer, "\x32\x4E\xD0\xFE\xF4\x13\xA2\x03", 8 ) )
837     return "Blowfish selftest failed (1).";
838   decrypt_block( (void *) &c, buffer, buffer );
839   if( memcmp( buffer, plain, 8 ) )
840     return "Blowfish selftest failed (2).";
841
842   bf_setkey( (void *) &c, key3, 8 );
843   encrypt_block( (void *) &c, buffer, plain3 );
844   if( memcmp( buffer, cipher3, 8 ) )
845     return "Blowfish selftest failed (3).";
846   decrypt_block( (void *) &c, buffer, buffer );
847   if( memcmp( buffer, plain3, 8 ) )
848     return "Blowfish selftest failed (4).";
849
850   if ( (r = selftest_cbc ()) )
851     return r;
852
853   if ( (r = selftest_cfb ()) )
854     return r;
855
856   if ( (r = selftest_ctr ()) )
857     return r;
858
859   return NULL;
860 }
861
862
863 struct hashset_elem {
864   u32 val;
865   short nidx;
866   char used;
867 };
868
869 static inline byte
870 val_to_hidx(u32 val)
871 {
872   /* bf sboxes are quite random already. */
873   return (val >> 24) ^ (val >> 16)  ^ (val >> 8) ^ val;
874 }
875
876 static inline int
877 add_val(struct hashset_elem hset[256], u32 val, int *midx,
878         struct hashset_elem *mpool)
879 {
880   struct hashset_elem *elem;
881   byte hidx;
882
883   hidx = val_to_hidx(val);
884   elem = &hset[hidx];
885
886   /* Check if first is in use. */
887   if (elem->used == 0)
888     {
889       elem->val = val;
890       elem->nidx = -1;
891       elem->used = 1;
892       return 0;
893     }
894
895   /* Check if first matches. */
896   if (elem->val == val)
897     return 1;
898
899   for (; elem->nidx >= 0; elem = &mpool[elem->nidx])
900     {
901       /* Check if elem matches. */
902       if (elem->val == val)
903         return 1;
904     }
905
906   elem->nidx = (*midx)++;
907   elem = &mpool[elem->nidx];
908
909   elem->val = val;
910   elem->nidx = -1;
911   elem->used = 1;
912
913   return 0;
914 }
915
916 static gcry_err_code_t
917 do_bf_setkey (BLOWFISH_context *c, const byte *key, unsigned keylen)
918 {
919   struct hashset_elem mempool[4 * 255]; /* Enough entries for the worst case. */
920   struct hashset_elem hset[4][256];
921   int memidx = 0;
922   int weak = 0;
923   int i, j, ret;
924   u32 data, datal, datar;
925   static int initialized;
926   static const char *selftest_failed;
927
928   if( !initialized )
929     {
930       initialized = 1;
931       selftest_failed = selftest();
932       if( selftest_failed )
933         log_error ("%s\n", selftest_failed );
934     }
935   if( selftest_failed )
936     return GPG_ERR_SELFTEST_FAILED;
937
938   memset(hset, 0, sizeof(hset));
939
940   for(i=0; i < BLOWFISH_ROUNDS+2; i++ )
941     c->p[i] = ps[i];
942   for(i=0; i < 256; i++ )
943     {
944       c->s0[i] = ks0[i];
945       c->s1[i] = ks1[i];
946       c->s2[i] = ks2[i];
947       c->s3[i] = ks3[i];
948     }
949
950   for(i=j=0; i < BLOWFISH_ROUNDS+2; i++ )
951     {
952       data = ((u32)key[j] << 24) |
953              ((u32)key[(j+1)%keylen] << 16) |
954              ((u32)key[(j+2)%keylen] << 8) |
955              ((u32)key[(j+3)%keylen]);
956       c->p[i] ^= data;
957       j = (j+4) % keylen;
958     }
959
960   datal = datar = 0;
961   for(i=0; i < BLOWFISH_ROUNDS+2; i += 2 )
962     {
963       do_encrypt( c, &datal, &datar );
964       c->p[i]   = datal;
965       c->p[i+1] = datar;
966     }
967   for(i=0; i < 256; i += 2 )
968     {
969       do_encrypt( c, &datal, &datar );
970       c->s0[i]   = datal;
971       c->s0[i+1] = datar;
972
973       /* Add values to hashset, detect duplicates (weak keys). */
974       ret = add_val (hset[0], datal, &memidx, mempool);
975       weak = ret ? 1 : weak;
976       ret = add_val (hset[0], datar, &memidx, mempool);
977       weak = ret ? 1 : weak;
978     }
979   for(i=0; i < 256; i += 2 )
980     {
981       do_encrypt( c, &datal, &datar );
982       c->s1[i]   = datal;
983       c->s1[i+1] = datar;
984
985       /* Add values to hashset, detect duplicates (weak keys). */
986       ret = add_val (hset[1], datal, &memidx, mempool);
987       weak = ret ? 1 : weak;
988       ret = add_val (hset[1], datar, &memidx, mempool);
989       weak = ret ? 1 : weak;
990     }
991   for(i=0; i < 256; i += 2 )
992     {
993       do_encrypt( c, &datal, &datar );
994       c->s2[i]   = datal;
995       c->s2[i+1] = datar;
996
997       /* Add values to hashset, detect duplicates (weak keys). */
998       ret = add_val (hset[2], datal, &memidx, mempool);
999       weak = ret ? 1 : weak;
1000       ret = add_val (hset[2], datar, &memidx, mempool);
1001       weak = ret ? 1 : weak;
1002     }
1003   for(i=0; i < 256; i += 2 )
1004     {
1005       do_encrypt( c, &datal, &datar );
1006       c->s3[i]   = datal;
1007       c->s3[i+1] = datar;
1008
1009       /* Add values to hashset, detect duplicates (weak keys). */
1010       ret = add_val (hset[3], datal, &memidx, mempool);
1011       weak = ret ? 1 : weak;
1012       ret = add_val (hset[3], datar, &memidx, mempool);
1013       weak = ret ? 1 : weak;
1014     }
1015
1016   /* Clear stack. */
1017   wipememory(hset, sizeof(hset));
1018   wipememory(mempool, sizeof(mempool[0]) * memidx);
1019
1020   _gcry_burn_stack (64);
1021
1022   /* Check for weak key.  A weak key is a key in which a value in
1023      the P-array (here c) occurs more than once per table.  */
1024   if (weak)
1025     return GPG_ERR_WEAK_KEY;
1026
1027   return GPG_ERR_NO_ERROR;
1028 }
1029
1030
1031 static gcry_err_code_t
1032 bf_setkey (void *context, const byte *key, unsigned keylen)
1033 {
1034   BLOWFISH_context *c = (BLOWFISH_context *) context;
1035   gcry_err_code_t rc = do_bf_setkey (c, key, keylen);
1036   return rc;
1037 }
1038
1039
1040 gcry_cipher_spec_t _gcry_cipher_spec_blowfish =
1041   {
1042     GCRY_CIPHER_BLOWFISH, {0, 0},
1043     "BLOWFISH", NULL, NULL, BLOWFISH_BLOCKSIZE, 128,
1044     sizeof (BLOWFISH_context),
1045     bf_setkey, encrypt_block, decrypt_block
1046   };