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Diffstat (limited to 'src/lib/libcrypto/rc2/rc2_cbc.c')
-rw-r--r-- | src/lib/libcrypto/rc2/rc2_cbc.c | 235 |
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diff --git a/src/lib/libcrypto/rc2/rc2_cbc.c b/src/lib/libcrypto/rc2/rc2_cbc.c new file mode 100644 index 0000000000..22e89f0441 --- /dev/null +++ b/src/lib/libcrypto/rc2/rc2_cbc.c | |||
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1 | /* crypto/rc2/rc2_cbc.c */ | ||
2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | ||
3 | * All rights reserved. | ||
4 | * | ||
5 | * This package is an SSL implementation written | ||
6 | * by Eric Young (eay@cryptsoft.com). | ||
7 | * The implementation was written so as to conform with Netscapes SSL. | ||
8 | * | ||
9 | * This library is free for commercial and non-commercial use as long as | ||
10 | * the following conditions are aheared to. The following conditions | ||
11 | * apply to all code found in this distribution, be it the RC4, RSA, | ||
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | ||
13 | * included with this distribution is covered by the same copyright terms | ||
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | ||
15 | * | ||
16 | * Copyright remains Eric Young's, and as such any Copyright notices in | ||
17 | * the code are not to be removed. | ||
18 | * If this package is used in a product, Eric Young should be given attribution | ||
19 | * as the author of the parts of the library used. | ||
20 | * This can be in the form of a textual message at program startup or | ||
21 | * in documentation (online or textual) provided with the package. | ||
22 | * | ||
23 | * Redistribution and use in source and binary forms, with or without | ||
24 | * modification, are permitted provided that the following conditions | ||
25 | * are met: | ||
26 | * 1. Redistributions of source code must retain the copyright | ||
27 | * notice, this list of conditions and the following disclaimer. | ||
28 | * 2. Redistributions in binary form must reproduce the above copyright | ||
29 | * notice, this list of conditions and the following disclaimer in the | ||
30 | * documentation and/or other materials provided with the distribution. | ||
31 | * 3. All advertising materials mentioning features or use of this software | ||
32 | * must display the following acknowledgement: | ||
33 | * "This product includes cryptographic software written by | ||
34 | * Eric Young (eay@cryptsoft.com)" | ||
35 | * The word 'cryptographic' can be left out if the rouines from the library | ||
36 | * being used are not cryptographic related :-). | ||
37 | * 4. If you include any Windows specific code (or a derivative thereof) from | ||
38 | * the apps directory (application code) you must include an acknowledgement: | ||
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | ||
40 | * | ||
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | ||
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | ||
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | ||
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | ||
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | ||
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | ||
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | ||
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | ||
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | ||
51 | * SUCH DAMAGE. | ||
52 | * | ||
53 | * The licence and distribution terms for any publically available version or | ||
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | ||
55 | * copied and put under another distribution licence | ||
56 | * [including the GNU Public Licence.] | ||
57 | */ | ||
58 | |||
59 | #include "rc2.h" | ||
60 | #include "rc2_locl.h" | ||
61 | |||
62 | void RC2_cbc_encrypt(in, out, length, ks, iv, encrypt) | ||
63 | unsigned char *in; | ||
64 | unsigned char *out; | ||
65 | long length; | ||
66 | RC2_KEY *ks; | ||
67 | unsigned char *iv; | ||
68 | int encrypt; | ||
69 | { | ||
70 | register unsigned long tin0,tin1; | ||
71 | register unsigned long tout0,tout1,xor0,xor1; | ||
72 | register long l=length; | ||
73 | unsigned long tin[2]; | ||
74 | |||
75 | if (encrypt) | ||
76 | { | ||
77 | c2l(iv,tout0); | ||
78 | c2l(iv,tout1); | ||
79 | iv-=8; | ||
80 | for (l-=8; l>=0; l-=8) | ||
81 | { | ||
82 | c2l(in,tin0); | ||
83 | c2l(in,tin1); | ||
84 | tin0^=tout0; | ||
85 | tin1^=tout1; | ||
86 | tin[0]=tin0; | ||
87 | tin[1]=tin1; | ||
88 | RC2_encrypt(tin,ks); | ||
89 | tout0=tin[0]; l2c(tout0,out); | ||
90 | tout1=tin[1]; l2c(tout1,out); | ||
91 | } | ||
92 | if (l != -8) | ||
93 | { | ||
94 | c2ln(in,tin0,tin1,l+8); | ||
95 | tin0^=tout0; | ||
96 | tin1^=tout1; | ||
97 | tin[0]=tin0; | ||
98 | tin[1]=tin1; | ||
99 | RC2_encrypt(tin,ks); | ||
100 | tout0=tin[0]; l2c(tout0,out); | ||
101 | tout1=tin[1]; l2c(tout1,out); | ||
102 | } | ||
103 | l2c(tout0,iv); | ||
104 | l2c(tout1,iv); | ||
105 | } | ||
106 | else | ||
107 | { | ||
108 | c2l(iv,xor0); | ||
109 | c2l(iv,xor1); | ||
110 | iv-=8; | ||
111 | for (l-=8; l>=0; l-=8) | ||
112 | { | ||
113 | c2l(in,tin0); tin[0]=tin0; | ||
114 | c2l(in,tin1); tin[1]=tin1; | ||
115 | RC2_decrypt(tin,ks); | ||
116 | tout0=tin[0]^xor0; | ||
117 | tout1=tin[1]^xor1; | ||
118 | l2c(tout0,out); | ||
119 | l2c(tout1,out); | ||
120 | xor0=tin0; | ||
121 | xor1=tin1; | ||
122 | } | ||
123 | if (l != -8) | ||
124 | { | ||
125 | c2l(in,tin0); tin[0]=tin0; | ||
126 | c2l(in,tin1); tin[1]=tin1; | ||
127 | RC2_decrypt(tin,ks); | ||
128 | tout0=tin[0]^xor0; | ||
129 | tout1=tin[1]^xor1; | ||
130 | l2cn(tout0,tout1,out,l+8); | ||
131 | xor0=tin0; | ||
132 | xor1=tin1; | ||
133 | } | ||
134 | l2c(xor0,iv); | ||
135 | l2c(xor1,iv); | ||
136 | } | ||
137 | tin0=tin1=tout0=tout1=xor0=xor1=0; | ||
138 | tin[0]=tin[1]=0; | ||
139 | } | ||
140 | |||
141 | void RC2_encrypt(d,key) | ||
142 | unsigned long *d; | ||
143 | RC2_KEY *key; | ||
144 | { | ||
145 | int i,n; | ||
146 | register RC2_INT *p0,*p1; | ||
147 | register RC2_INT x0,x1,x2,x3,t; | ||
148 | unsigned long l; | ||
149 | |||
150 | l=d[0]; | ||
151 | x0=(RC2_INT)l&0xffff; | ||
152 | x1=(RC2_INT)(l>>16L); | ||
153 | l=d[1]; | ||
154 | x2=(RC2_INT)l&0xffff; | ||
155 | x3=(RC2_INT)(l>>16L); | ||
156 | |||
157 | n=3; | ||
158 | i=5; | ||
159 | |||
160 | p0=p1= &(key->data[0]); | ||
161 | for (;;) | ||
162 | { | ||
163 | t=(x0+(x1& ~x3)+(x2&x3)+ *(p0++))&0xffff; | ||
164 | x0=(t<<1)|(t>>15); | ||
165 | t=(x1+(x2& ~x0)+(x3&x0)+ *(p0++))&0xffff; | ||
166 | x1=(t<<2)|(t>>14); | ||
167 | t=(x2+(x3& ~x1)+(x0&x1)+ *(p0++))&0xffff; | ||
168 | x2=(t<<3)|(t>>13); | ||
169 | t=(x3+(x0& ~x2)+(x1&x2)+ *(p0++))&0xffff; | ||
170 | x3=(t<<5)|(t>>11); | ||
171 | |||
172 | if (--i == 0) | ||
173 | { | ||
174 | if (--n == 0) break; | ||
175 | i=(n == 2)?6:5; | ||
176 | |||
177 | x0+=p1[x3&0x3f]; | ||
178 | x1+=p1[x0&0x3f]; | ||
179 | x2+=p1[x1&0x3f]; | ||
180 | x3+=p1[x2&0x3f]; | ||
181 | } | ||
182 | } | ||
183 | |||
184 | d[0]=(unsigned long)(x0&0xffff)|((unsigned long)(x1&0xffff)<<16L); | ||
185 | d[1]=(unsigned long)(x2&0xffff)|((unsigned long)(x3&0xffff)<<16L); | ||
186 | } | ||
187 | |||
188 | void RC2_decrypt(d,key) | ||
189 | unsigned long *d; | ||
190 | RC2_KEY *key; | ||
191 | { | ||
192 | int i,n; | ||
193 | register RC2_INT *p0,*p1; | ||
194 | register RC2_INT x0,x1,x2,x3,t; | ||
195 | unsigned long l; | ||
196 | |||
197 | l=d[0]; | ||
198 | x0=(RC2_INT)l&0xffff; | ||
199 | x1=(RC2_INT)(l>>16L); | ||
200 | l=d[1]; | ||
201 | x2=(RC2_INT)l&0xffff; | ||
202 | x3=(RC2_INT)(l>>16L); | ||
203 | |||
204 | n=3; | ||
205 | i=5; | ||
206 | |||
207 | p0= &(key->data[63]); | ||
208 | p1= &(key->data[0]); | ||
209 | for (;;) | ||
210 | { | ||
211 | t=((x3<<11)|(x3>>5))&0xffff; | ||
212 | x3=(t-(x0& ~x2)-(x1&x2)- *(p0--))&0xffff; | ||
213 | t=((x2<<13)|(x2>>3))&0xffff; | ||
214 | x2=(t-(x3& ~x1)-(x0&x1)- *(p0--))&0xffff; | ||
215 | t=((x1<<14)|(x1>>2))&0xffff; | ||
216 | x1=(t-(x2& ~x0)-(x3&x0)- *(p0--))&0xffff; | ||
217 | t=((x0<<15)|(x0>>1))&0xffff; | ||
218 | x0=(t-(x1& ~x3)-(x2&x3)- *(p0--))&0xffff; | ||
219 | |||
220 | if (--i == 0) | ||
221 | { | ||
222 | if (--n == 0) break; | ||
223 | i=(n == 2)?6:5; | ||
224 | |||
225 | x3=(x3-p1[x2&0x3f])&0xffff; | ||
226 | x2=(x2-p1[x1&0x3f])&0xffff; | ||
227 | x1=(x1-p1[x0&0x3f])&0xffff; | ||
228 | x0=(x0-p1[x3&0x3f])&0xffff; | ||
229 | } | ||
230 | } | ||
231 | |||
232 | d[0]=(unsigned long)(x0&0xffff)|((unsigned long)(x1&0xffff)<<16L); | ||
233 | d[1]=(unsigned long)(x2&0xffff)|((unsigned long)(x3&0xffff)<<16L); | ||
234 | } | ||
235 | |||