openssl/crypto/rc4/rrc4.doc - Issue 2072073002: Delete bundled copy of OpenSSL and replace with README.

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Issue 2072073002: Delete bundled copy of OpenSSL and replace with README. (Closed) Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master

Patch Set: Delete bundled copy of OpenSSL and replace with README. Created 4 years, 6 months ago

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1 Newsgroups: sci.crypt,alt.security,comp.security.misc,alt.privacy

2 Path: ghost.dsi.unimi.it!univ-lyon1.fr!jussieu.fr!zaphod.crihan.fr!warwick!clyde .open.ac.uk!strath-cs!bnr.co.uk!bt!pipex!howland.reston.ans.net!europa.eng.gtefs d.com!MathWorks.Com!yeshua.marcam.com!charnel.ecst.csuchico.edu!csusac!csus.edu! netcom.com!sterndark

3 From: sterndark@netcom.com (David Sterndark)

4 Subject: RC4 Algorithm revealed.

5 Message-ID: <sternCvKL4B.Hyy@netcom.com>

6 Sender: sterndark@netcom.com

7 Organization: NETCOM On-line Communication Services (408 261-4700 guest)

8 X-Newsreader: TIN [version 1.2 PL1]

9 Date: Wed, 14 Sep 1994 06:35:31 GMT

10 Lines: 263

11 Xref: ghost.dsi.unimi.it sci.crypt:27332 alt.security:14732 comp.security.misc:1 1701 alt.privacy:16026

12

13 I am shocked, shocked, I tell you, shocked, to discover

14 that the cypherpunks have illegaly and criminally revealed

15 a crucial RSA trade secret and harmed the security of

16 America by reverse engineering the RC4 algorithm and

17 publishing it to the world.

18

19 On Saturday morning an anonymous cypherpunk wrote:

20

21

22 SUBJECT: RC4 Source Code

23

24

25 I've tested this. It is compatible with the RC4 object module

26 that comes in the various RSA toolkits.

27

28 /* rc4.h */

29 typedef struct rc4_key

30 {

31 unsigned char state[256];

32 unsigned char x;

33 unsigned char y;

34 } rc4_key;

35 void prepare_key(unsigned char *key_data_ptr,int key_data_len,

36 rc4_key *key);

37 void rc4(unsigned char buffer_ptr,int buffer_len,rc4_key key);

38

39

40 /rc4.c /

41 #include "rc4.h"

42 static void swap_byte(unsigned char a, unsigned char b);

43 void prepare_key(unsigned char *key_data_ptr, int key_data_len,

44 rc4_key *key)

45 {

46 unsigned char swapByte;

47 unsigned char index1;

48 unsigned char index2;

49 unsigned char* state;

50 short counter;

51

52 state = &key->state[0];

53 for(counter = 0; counter < 256; counter++)

54 state[counter] = counter;

55 key->x = 0;

56 key->y = 0;

57 index1 = 0;

58 index2 = 0;

59 for(counter = 0; counter < 256; counter++)

60 {

61 index2 = (key_data_ptr[index1] + state[counter] +

62 index2) % 256;

63 swap_byte(&state[counter], &state[index2]);

64

65 index1 = (index1 + 1) % key_data_len;

66 }

67 }

68

69 void rc4(unsigned char buffer_ptr, int buffer_len, rc4_key key)

70 {

71 unsigned char x;

72 unsigned char y;

73 unsigned char* state;

74 unsigned char xorIndex;

75 short counter;

76

77 x = key->x;

78 y = key->y;

79

80 state = &key->state[0];

81 for(counter = 0; counter < buffer_len; counter ++)

82 {

83 x = (x + 1) % 256;

84 y = (state[x] + y) % 256;

85 swap_byte(&state[x], &state[y]);

86

87 xorIndex = (state[x] + state[y]) % 256;

88

89 buffer_ptr[counter] ^= state[xorIndex];

90 }

91 key->x = x;

92 key->y = y;

93 }

94

95 static void swap_byte(unsigned char a, unsigned char b)

96 {

97 unsigned char swapByte;

98

99 swapByte = *a;

100 a = b;

101 *b = swapByte;

102 }

103

104

105

106 Another cypherpunk, this one not anonymous, tested the

107 output from this algorithm against the output from

108 official RC4 object code

109

110

111 Date: Tue, 13 Sep 94 18:37:56 PDT

112 From: ekr@eit.COM (Eric Rescorla)

113 Message-Id: <9409140137.AA17743@eitech.eit.com>

114 Subject: RC4 compatibility testing

115 Cc: cypherpunks@toad.com

116

117 One data point:

118

119 I can't say anything about the internals of RC4 versus the

120 algorithm that Bill Sommerfeld is rightly calling 'Alleged RC4',

121 since I don't know anything about RC4's internals.

122

123 However, I do have a (legitimately acquired) copy of BSAFE2 and

124 so I'm able to compare the output of this algorithm to the output

125 of genuine RC4 as found in BSAFE. I chose a set of test vectors

126 and ran them through both algorithms. The algorithms appear to

127 give identical results, at least with these key/plaintext pairs.

128

129 I note that this is the algorithm _without_ Hal Finney's

130 proposed modification

131

132 (see <199409130605.XAA24133@jobe.shell.portal.com>).

133

134 The vectors I used (together with the ciphertext they produce)

135 follow at the end of this message.

136

137 -Ekr

138

139 Disclaimer: This posting does not reflect the opinions of EIT.

140

141 --------------------results follow--------------

142 Test vector 0

143 Key: 0x01 0x23 0x45 0x67 0x89 0xab 0xcd 0xef

144 Input: 0x01 0x23 0x45 0x67 0x89 0xab 0xcd 0xef

145 0 Output: 0x75 0xb7 0x87 0x80 0x99 0xe0 0xc5 0x96

146

147 Test vector 1

148 Key: 0x01 0x23 0x45 0x67 0x89 0xab 0xcd 0xef

149 Input: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00

150 0 Output: 0x74 0x94 0xc2 0xe7 0x10 0x4b 0x08 0x79

151

152 Test vector 2

153 Key: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00

154 Input: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00

155 0 Output: 0xde 0x18 0x89 0x41 0xa3 0x37 0x5d 0x3a

156

157 Test vector 3

158 Key: 0xef 0x01 0x23 0x45

159 Input: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00

160 0 Output: 0xd6 0xa1 0x41 0xa7 0xec 0x3c 0x38 0xdf 0xbd 0x61

161

162 Test vector 4

163 Key: 0x01 0x23 0x45 0x67 0x89 0xab 0xcd 0xef

164 Input: 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

165 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

166 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

167 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

168 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

169 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

170 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

171 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

172 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

173 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

174 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

175 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

176 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

177 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

178 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

179 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

180 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

181 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

182 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

183 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

184 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

185 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

186 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

187 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

188 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

189 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

190 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

191 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

192 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

193 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

194 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

195 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

196 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

197 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

198 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

199 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

200 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

201 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

202 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

203 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

204 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

205 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

206 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

207 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

208 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

209 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

210 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

211 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

212 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

213 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

214 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

215 0x01

216 0 Output: 0x75 0x95 0xc3 0xe6 0x11 0x4a 0x09 0x78 0x0c 0x4a 0xd4

217 0x52 0x33 0x8e 0x1f 0xfd 0x9a 0x1b 0xe9 0x49 0x8f

218 0x81 0x3d 0x76 0x53 0x34 0x49 0xb6 0x77 0x8d 0xca

219 0xd8 0xc7 0x8a 0x8d 0x2b 0xa9 0xac 0x66 0x08 0x5d

220 0x0e 0x53 0xd5 0x9c 0x26 0xc2 0xd1 0xc4 0x90 0xc1

221 0xeb 0xbe 0x0c 0xe6 0x6d 0x1b 0x6b 0x1b 0x13 0xb6

222 0xb9 0x19 0xb8 0x47 0xc2 0x5a 0x91 0x44 0x7a 0x95

223 0xe7 0x5e 0x4e 0xf1 0x67 0x79 0xcd 0xe8 0xbf 0x0a

224 0x95 0x85 0x0e 0x32 0xaf 0x96 0x89 0x44 0x4f 0xd3

225 0x77 0x10 0x8f 0x98 0xfd 0xcb 0xd4 0xe7 0x26 0x56

226 0x75 0x00 0x99 0x0b 0xcc 0x7e 0x0c 0xa3 0xc4 0xaa

227 0xa3 0x04 0xa3 0x87 0xd2 0x0f 0x3b 0x8f 0xbb 0xcd

228 0x42 0xa1 0xbd 0x31 0x1d 0x7a 0x43 0x03 0xdd 0xa5

229 0xab 0x07 0x88 0x96 0xae 0x80 0xc1 0x8b 0x0a 0xf6

230 0x6d 0xff 0x31 0x96 0x16 0xeb 0x78 0x4e 0x49 0x5a

231 0xd2 0xce 0x90 0xd7 0xf7 0x72 0xa8 0x17 0x47 0xb6

232 0x5f 0x62 0x09 0x3b 0x1e 0x0d 0xb9 0xe5 0xba 0x53

233 0x2f 0xaf 0xec 0x47 0x50 0x83 0x23 0xe6 0x71 0x32

234 0x7d 0xf9 0x44 0x44 0x32 0xcb 0x73 0x67 0xce 0xc8

235 0x2f 0x5d 0x44 0xc0 0xd0 0x0b 0x67 0xd6 0x50 0xa0

236 0x75 0xcd 0x4b 0x70 0xde 0xdd 0x77 0xeb 0x9b 0x10

237 0x23 0x1b 0x6b 0x5b 0x74 0x13 0x47 0x39 0x6d 0x62

238 0x89 0x74 0x21 0xd4 0x3d 0xf9 0xb4 0x2e 0x44 0x6e

239 0x35 0x8e 0x9c 0x11 0xa9 0xb2 0x18 0x4e 0xcb 0xef

240 0x0c 0xd8 0xe7 0xa8 0x77 0xef 0x96 0x8f 0x13 0x90

241 0xec 0x9b 0x3d 0x35 0xa5 0x58 0x5c 0xb0 0x09 0x29

242 0x0e 0x2f 0xcd 0xe7 0xb5 0xec 0x66 0xd9 0x08 0x4b

243 0xe4 0x40 0x55 0xa6 0x19 0xd9 0xdd 0x7f 0xc3 0x16

244 0x6f 0x94 0x87 0xf7 0xcb 0x27 0x29 0x12 0x42 0x64

245 0x45 0x99 0x85 0x14 0xc1 0x5d 0x53 0xa1 0x8c 0x86

246 0x4c 0xe3 0xa2 0xb7 0x55 0x57 0x93 0x98 0x81 0x26

247 0x52 0x0e 0xac 0xf2 0xe3 0x06 0x6e 0x23 0x0c 0x91

248 0xbe 0xe4 0xdd 0x53 0x04 0xf5 0xfd 0x04 0x05 0xb3

249 0x5b 0xd9 0x9c 0x73 0x13 0x5d 0x3d 0x9b 0xc3 0x35

250 0xee 0x04 0x9e 0xf6 0x9b 0x38 0x67 0xbf 0x2d 0x7b

251 0xd1 0xea 0xa5 0x95 0xd8 0xbf 0xc0 0x06 0x6f 0xf8

252 0xd3 0x15 0x09 0xeb 0x0c 0x6c 0xaa 0x00 0x6c 0x80

253 0x7a 0x62 0x3e 0xf8 0x4c 0x3d 0x33 0xc1 0x95 0xd2

254 0x3e 0xe3 0x20 0xc4 0x0d 0xe0 0x55 0x81 0x57 0xc8

255 0x22 0xd4 0xb8 0xc5 0x69 0xd8 0x49 0xae 0xd5 0x9d

256 0x4e 0x0f 0xd7 0xf3 0x79 0x58 0x6b 0x4b 0x7f 0xf6

257 0x84 0xed 0x6a 0x18 0x9f 0x74 0x86 0xd4 0x9b 0x9c

258 0x4b 0xad 0x9b 0xa2 0x4b 0x96 0xab 0xf9 0x24 0x37

259 0x2c 0x8a 0x8f 0xff 0xb1 0x0d 0x55 0x35 0x49 0x00

260 0xa7 0x7a 0x3d 0xb5 0xf2 0x05 0xe1 0xb9 0x9f 0xcd

261 0x86 0x60 0x86 0x3a 0x15 0x9a 0xd4 0xab 0xe4 0x0f

262 0xa4 0x89 0x34 0x16 0x3d 0xdd 0xe5 0x42 0xa6 0x58

263 0x55 0x40 0xfd 0x68 0x3c 0xbf 0xd8 0xc0 0x0f 0x12

264 0x12 0x9a 0x28 0x4d 0xea 0xcc 0x4c 0xde 0xfe 0x58

265 0xbe 0x71 0x37 0x54 0x1c 0x04 0x71 0x26 0xc8 0xd4

266 0x9e 0x27 0x55 0xab 0x18 0x1a 0xb7 0xe9 0x40 0xb0

267 0xc0

268

269

270

271 --

272 ---------------------------------------------------------------------

273 We have the right to defend ourselves and our

274 property, because of the kind of animals that we James A. Donald

275 are. True law derives from this right, not from

276 the arbitrary power of the omnipotent state. jamesd@netcom.com

277

278

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