This source file includes following definitions.
- fcrypt_encrypt
- fcrypt_decrypt
- fcrypt_setkey
- fcrypt_mod_init
- fcrypt_mod_fini
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45 #include <asm/byteorder.h>
46 #include <linux/bitops.h>
47 #include <linux/init.h>
48 #include <linux/module.h>
49 #include <linux/crypto.h>
50
51 #define ROUNDS 16
52
53 struct fcrypt_ctx {
54 __be32 sched[ROUNDS];
55 };
56
57
58 #define ror56(hi, lo, n) \
59 do { \
60 u32 t = lo & ((1 << n) - 1); \
61 lo = (lo >> n) | ((hi & ((1 << n) - 1)) << (32 - n)); \
62 hi = (hi >> n) | (t << (24-n)); \
63 } while (0)
64
65
66 #define ror56_64(k, n) \
67 do { \
68 k = (k >> n) | ((k & ((1 << n) - 1)) << (56 - n)); \
69 } while (0)
70
71
72
73
74
75 #undef Z
76 #define Z(x) cpu_to_be32(x << 3)
77 static const __be32 sbox0[256] = {
78 Z(0xea), Z(0x7f), Z(0xb2), Z(0x64), Z(0x9d), Z(0xb0), Z(0xd9), Z(0x11),
79 Z(0xcd), Z(0x86), Z(0x86), Z(0x91), Z(0x0a), Z(0xb2), Z(0x93), Z(0x06),
80 Z(0x0e), Z(0x06), Z(0xd2), Z(0x65), Z(0x73), Z(0xc5), Z(0x28), Z(0x60),
81 Z(0xf2), Z(0x20), Z(0xb5), Z(0x38), Z(0x7e), Z(0xda), Z(0x9f), Z(0xe3),
82 Z(0xd2), Z(0xcf), Z(0xc4), Z(0x3c), Z(0x61), Z(0xff), Z(0x4a), Z(0x4a),
83 Z(0x35), Z(0xac), Z(0xaa), Z(0x5f), Z(0x2b), Z(0xbb), Z(0xbc), Z(0x53),
84 Z(0x4e), Z(0x9d), Z(0x78), Z(0xa3), Z(0xdc), Z(0x09), Z(0x32), Z(0x10),
85 Z(0xc6), Z(0x6f), Z(0x66), Z(0xd6), Z(0xab), Z(0xa9), Z(0xaf), Z(0xfd),
86 Z(0x3b), Z(0x95), Z(0xe8), Z(0x34), Z(0x9a), Z(0x81), Z(0x72), Z(0x80),
87 Z(0x9c), Z(0xf3), Z(0xec), Z(0xda), Z(0x9f), Z(0x26), Z(0x76), Z(0x15),
88 Z(0x3e), Z(0x55), Z(0x4d), Z(0xde), Z(0x84), Z(0xee), Z(0xad), Z(0xc7),
89 Z(0xf1), Z(0x6b), Z(0x3d), Z(0xd3), Z(0x04), Z(0x49), Z(0xaa), Z(0x24),
90 Z(0x0b), Z(0x8a), Z(0x83), Z(0xba), Z(0xfa), Z(0x85), Z(0xa0), Z(0xa8),
91 Z(0xb1), Z(0xd4), Z(0x01), Z(0xd8), Z(0x70), Z(0x64), Z(0xf0), Z(0x51),
92 Z(0xd2), Z(0xc3), Z(0xa7), Z(0x75), Z(0x8c), Z(0xa5), Z(0x64), Z(0xef),
93 Z(0x10), Z(0x4e), Z(0xb7), Z(0xc6), Z(0x61), Z(0x03), Z(0xeb), Z(0x44),
94 Z(0x3d), Z(0xe5), Z(0xb3), Z(0x5b), Z(0xae), Z(0xd5), Z(0xad), Z(0x1d),
95 Z(0xfa), Z(0x5a), Z(0x1e), Z(0x33), Z(0xab), Z(0x93), Z(0xa2), Z(0xb7),
96 Z(0xe7), Z(0xa8), Z(0x45), Z(0xa4), Z(0xcd), Z(0x29), Z(0x63), Z(0x44),
97 Z(0xb6), Z(0x69), Z(0x7e), Z(0x2e), Z(0x62), Z(0x03), Z(0xc8), Z(0xe0),
98 Z(0x17), Z(0xbb), Z(0xc7), Z(0xf3), Z(0x3f), Z(0x36), Z(0xba), Z(0x71),
99 Z(0x8e), Z(0x97), Z(0x65), Z(0x60), Z(0x69), Z(0xb6), Z(0xf6), Z(0xe6),
100 Z(0x6e), Z(0xe0), Z(0x81), Z(0x59), Z(0xe8), Z(0xaf), Z(0xdd), Z(0x95),
101 Z(0x22), Z(0x99), Z(0xfd), Z(0x63), Z(0x19), Z(0x74), Z(0x61), Z(0xb1),
102 Z(0xb6), Z(0x5b), Z(0xae), Z(0x54), Z(0xb3), Z(0x70), Z(0xff), Z(0xc6),
103 Z(0x3b), Z(0x3e), Z(0xc1), Z(0xd7), Z(0xe1), Z(0x0e), Z(0x76), Z(0xe5),
104 Z(0x36), Z(0x4f), Z(0x59), Z(0xc7), Z(0x08), Z(0x6e), Z(0x82), Z(0xa6),
105 Z(0x93), Z(0xc4), Z(0xaa), Z(0x26), Z(0x49), Z(0xe0), Z(0x21), Z(0x64),
106 Z(0x07), Z(0x9f), Z(0x64), Z(0x81), Z(0x9c), Z(0xbf), Z(0xf9), Z(0xd1),
107 Z(0x43), Z(0xf8), Z(0xb6), Z(0xb9), Z(0xf1), Z(0x24), Z(0x75), Z(0x03),
108 Z(0xe4), Z(0xb0), Z(0x99), Z(0x46), Z(0x3d), Z(0xf5), Z(0xd1), Z(0x39),
109 Z(0x72), Z(0x12), Z(0xf6), Z(0xba), Z(0x0c), Z(0x0d), Z(0x42), Z(0x2e)
110 };
111
112 #undef Z
113 #define Z(x) cpu_to_be32(((x & 0x1f) << 27) | (x >> 5))
114 static const __be32 sbox1[256] = {
115 Z(0x77), Z(0x14), Z(0xa6), Z(0xfe), Z(0xb2), Z(0x5e), Z(0x8c), Z(0x3e),
116 Z(0x67), Z(0x6c), Z(0xa1), Z(0x0d), Z(0xc2), Z(0xa2), Z(0xc1), Z(0x85),
117 Z(0x6c), Z(0x7b), Z(0x67), Z(0xc6), Z(0x23), Z(0xe3), Z(0xf2), Z(0x89),
118 Z(0x50), Z(0x9c), Z(0x03), Z(0xb7), Z(0x73), Z(0xe6), Z(0xe1), Z(0x39),
119 Z(0x31), Z(0x2c), Z(0x27), Z(0x9f), Z(0xa5), Z(0x69), Z(0x44), Z(0xd6),
120 Z(0x23), Z(0x83), Z(0x98), Z(0x7d), Z(0x3c), Z(0xb4), Z(0x2d), Z(0x99),
121 Z(0x1c), Z(0x1f), Z(0x8c), Z(0x20), Z(0x03), Z(0x7c), Z(0x5f), Z(0xad),
122 Z(0xf4), Z(0xfa), Z(0x95), Z(0xca), Z(0x76), Z(0x44), Z(0xcd), Z(0xb6),
123 Z(0xb8), Z(0xa1), Z(0xa1), Z(0xbe), Z(0x9e), Z(0x54), Z(0x8f), Z(0x0b),
124 Z(0x16), Z(0x74), Z(0x31), Z(0x8a), Z(0x23), Z(0x17), Z(0x04), Z(0xfa),
125 Z(0x79), Z(0x84), Z(0xb1), Z(0xf5), Z(0x13), Z(0xab), Z(0xb5), Z(0x2e),
126 Z(0xaa), Z(0x0c), Z(0x60), Z(0x6b), Z(0x5b), Z(0xc4), Z(0x4b), Z(0xbc),
127 Z(0xe2), Z(0xaf), Z(0x45), Z(0x73), Z(0xfa), Z(0xc9), Z(0x49), Z(0xcd),
128 Z(0x00), Z(0x92), Z(0x7d), Z(0x97), Z(0x7a), Z(0x18), Z(0x60), Z(0x3d),
129 Z(0xcf), Z(0x5b), Z(0xde), Z(0xc6), Z(0xe2), Z(0xe6), Z(0xbb), Z(0x8b),
130 Z(0x06), Z(0xda), Z(0x08), Z(0x15), Z(0x1b), Z(0x88), Z(0x6a), Z(0x17),
131 Z(0x89), Z(0xd0), Z(0xa9), Z(0xc1), Z(0xc9), Z(0x70), Z(0x6b), Z(0xe5),
132 Z(0x43), Z(0xf4), Z(0x68), Z(0xc8), Z(0xd3), Z(0x84), Z(0x28), Z(0x0a),
133 Z(0x52), Z(0x66), Z(0xa3), Z(0xca), Z(0xf2), Z(0xe3), Z(0x7f), Z(0x7a),
134 Z(0x31), Z(0xf7), Z(0x88), Z(0x94), Z(0x5e), Z(0x9c), Z(0x63), Z(0xd5),
135 Z(0x24), Z(0x66), Z(0xfc), Z(0xb3), Z(0x57), Z(0x25), Z(0xbe), Z(0x89),
136 Z(0x44), Z(0xc4), Z(0xe0), Z(0x8f), Z(0x23), Z(0x3c), Z(0x12), Z(0x52),
137 Z(0xf5), Z(0x1e), Z(0xf4), Z(0xcb), Z(0x18), Z(0x33), Z(0x1f), Z(0xf8),
138 Z(0x69), Z(0x10), Z(0x9d), Z(0xd3), Z(0xf7), Z(0x28), Z(0xf8), Z(0x30),
139 Z(0x05), Z(0x5e), Z(0x32), Z(0xc0), Z(0xd5), Z(0x19), Z(0xbd), Z(0x45),
140 Z(0x8b), Z(0x5b), Z(0xfd), Z(0xbc), Z(0xe2), Z(0x5c), Z(0xa9), Z(0x96),
141 Z(0xef), Z(0x70), Z(0xcf), Z(0xc2), Z(0x2a), Z(0xb3), Z(0x61), Z(0xad),
142 Z(0x80), Z(0x48), Z(0x81), Z(0xb7), Z(0x1d), Z(0x43), Z(0xd9), Z(0xd7),
143 Z(0x45), Z(0xf0), Z(0xd8), Z(0x8a), Z(0x59), Z(0x7c), Z(0x57), Z(0xc1),
144 Z(0x79), Z(0xc7), Z(0x34), Z(0xd6), Z(0x43), Z(0xdf), Z(0xe4), Z(0x78),
145 Z(0x16), Z(0x06), Z(0xda), Z(0x92), Z(0x76), Z(0x51), Z(0xe1), Z(0xd4),
146 Z(0x70), Z(0x03), Z(0xe0), Z(0x2f), Z(0x96), Z(0x91), Z(0x82), Z(0x80)
147 };
148
149 #undef Z
150 #define Z(x) cpu_to_be32(x << 11)
151 static const __be32 sbox2[256] = {
152 Z(0xf0), Z(0x37), Z(0x24), Z(0x53), Z(0x2a), Z(0x03), Z(0x83), Z(0x86),
153 Z(0xd1), Z(0xec), Z(0x50), Z(0xf0), Z(0x42), Z(0x78), Z(0x2f), Z(0x6d),
154 Z(0xbf), Z(0x80), Z(0x87), Z(0x27), Z(0x95), Z(0xe2), Z(0xc5), Z(0x5d),
155 Z(0xf9), Z(0x6f), Z(0xdb), Z(0xb4), Z(0x65), Z(0x6e), Z(0xe7), Z(0x24),
156 Z(0xc8), Z(0x1a), Z(0xbb), Z(0x49), Z(0xb5), Z(0x0a), Z(0x7d), Z(0xb9),
157 Z(0xe8), Z(0xdc), Z(0xb7), Z(0xd9), Z(0x45), Z(0x20), Z(0x1b), Z(0xce),
158 Z(0x59), Z(0x9d), Z(0x6b), Z(0xbd), Z(0x0e), Z(0x8f), Z(0xa3), Z(0xa9),
159 Z(0xbc), Z(0x74), Z(0xa6), Z(0xf6), Z(0x7f), Z(0x5f), Z(0xb1), Z(0x68),
160 Z(0x84), Z(0xbc), Z(0xa9), Z(0xfd), Z(0x55), Z(0x50), Z(0xe9), Z(0xb6),
161 Z(0x13), Z(0x5e), Z(0x07), Z(0xb8), Z(0x95), Z(0x02), Z(0xc0), Z(0xd0),
162 Z(0x6a), Z(0x1a), Z(0x85), Z(0xbd), Z(0xb6), Z(0xfd), Z(0xfe), Z(0x17),
163 Z(0x3f), Z(0x09), Z(0xa3), Z(0x8d), Z(0xfb), Z(0xed), Z(0xda), Z(0x1d),
164 Z(0x6d), Z(0x1c), Z(0x6c), Z(0x01), Z(0x5a), Z(0xe5), Z(0x71), Z(0x3e),
165 Z(0x8b), Z(0x6b), Z(0xbe), Z(0x29), Z(0xeb), Z(0x12), Z(0x19), Z(0x34),
166 Z(0xcd), Z(0xb3), Z(0xbd), Z(0x35), Z(0xea), Z(0x4b), Z(0xd5), Z(0xae),
167 Z(0x2a), Z(0x79), Z(0x5a), Z(0xa5), Z(0x32), Z(0x12), Z(0x7b), Z(0xdc),
168 Z(0x2c), Z(0xd0), Z(0x22), Z(0x4b), Z(0xb1), Z(0x85), Z(0x59), Z(0x80),
169 Z(0xc0), Z(0x30), Z(0x9f), Z(0x73), Z(0xd3), Z(0x14), Z(0x48), Z(0x40),
170 Z(0x07), Z(0x2d), Z(0x8f), Z(0x80), Z(0x0f), Z(0xce), Z(0x0b), Z(0x5e),
171 Z(0xb7), Z(0x5e), Z(0xac), Z(0x24), Z(0x94), Z(0x4a), Z(0x18), Z(0x15),
172 Z(0x05), Z(0xe8), Z(0x02), Z(0x77), Z(0xa9), Z(0xc7), Z(0x40), Z(0x45),
173 Z(0x89), Z(0xd1), Z(0xea), Z(0xde), Z(0x0c), Z(0x79), Z(0x2a), Z(0x99),
174 Z(0x6c), Z(0x3e), Z(0x95), Z(0xdd), Z(0x8c), Z(0x7d), Z(0xad), Z(0x6f),
175 Z(0xdc), Z(0xff), Z(0xfd), Z(0x62), Z(0x47), Z(0xb3), Z(0x21), Z(0x8a),
176 Z(0xec), Z(0x8e), Z(0x19), Z(0x18), Z(0xb4), Z(0x6e), Z(0x3d), Z(0xfd),
177 Z(0x74), Z(0x54), Z(0x1e), Z(0x04), Z(0x85), Z(0xd8), Z(0xbc), Z(0x1f),
178 Z(0x56), Z(0xe7), Z(0x3a), Z(0x56), Z(0x67), Z(0xd6), Z(0xc8), Z(0xa5),
179 Z(0xf3), Z(0x8e), Z(0xde), Z(0xae), Z(0x37), Z(0x49), Z(0xb7), Z(0xfa),
180 Z(0xc8), Z(0xf4), Z(0x1f), Z(0xe0), Z(0x2a), Z(0x9b), Z(0x15), Z(0xd1),
181 Z(0x34), Z(0x0e), Z(0xb5), Z(0xe0), Z(0x44), Z(0x78), Z(0x84), Z(0x59),
182 Z(0x56), Z(0x68), Z(0x77), Z(0xa5), Z(0x14), Z(0x06), Z(0xf5), Z(0x2f),
183 Z(0x8c), Z(0x8a), Z(0x73), Z(0x80), Z(0x76), Z(0xb4), Z(0x10), Z(0x86)
184 };
185
186 #undef Z
187 #define Z(x) cpu_to_be32(x << 19)
188 static const __be32 sbox3[256] = {
189 Z(0xa9), Z(0x2a), Z(0x48), Z(0x51), Z(0x84), Z(0x7e), Z(0x49), Z(0xe2),
190 Z(0xb5), Z(0xb7), Z(0x42), Z(0x33), Z(0x7d), Z(0x5d), Z(0xa6), Z(0x12),
191 Z(0x44), Z(0x48), Z(0x6d), Z(0x28), Z(0xaa), Z(0x20), Z(0x6d), Z(0x57),
192 Z(0xd6), Z(0x6b), Z(0x5d), Z(0x72), Z(0xf0), Z(0x92), Z(0x5a), Z(0x1b),
193 Z(0x53), Z(0x80), Z(0x24), Z(0x70), Z(0x9a), Z(0xcc), Z(0xa7), Z(0x66),
194 Z(0xa1), Z(0x01), Z(0xa5), Z(0x41), Z(0x97), Z(0x41), Z(0x31), Z(0x82),
195 Z(0xf1), Z(0x14), Z(0xcf), Z(0x53), Z(0x0d), Z(0xa0), Z(0x10), Z(0xcc),
196 Z(0x2a), Z(0x7d), Z(0xd2), Z(0xbf), Z(0x4b), Z(0x1a), Z(0xdb), Z(0x16),
197 Z(0x47), Z(0xf6), Z(0x51), Z(0x36), Z(0xed), Z(0xf3), Z(0xb9), Z(0x1a),
198 Z(0xa7), Z(0xdf), Z(0x29), Z(0x43), Z(0x01), Z(0x54), Z(0x70), Z(0xa4),
199 Z(0xbf), Z(0xd4), Z(0x0b), Z(0x53), Z(0x44), Z(0x60), Z(0x9e), Z(0x23),
200 Z(0xa1), Z(0x18), Z(0x68), Z(0x4f), Z(0xf0), Z(0x2f), Z(0x82), Z(0xc2),
201 Z(0x2a), Z(0x41), Z(0xb2), Z(0x42), Z(0x0c), Z(0xed), Z(0x0c), Z(0x1d),
202 Z(0x13), Z(0x3a), Z(0x3c), Z(0x6e), Z(0x35), Z(0xdc), Z(0x60), Z(0x65),
203 Z(0x85), Z(0xe9), Z(0x64), Z(0x02), Z(0x9a), Z(0x3f), Z(0x9f), Z(0x87),
204 Z(0x96), Z(0xdf), Z(0xbe), Z(0xf2), Z(0xcb), Z(0xe5), Z(0x6c), Z(0xd4),
205 Z(0x5a), Z(0x83), Z(0xbf), Z(0x92), Z(0x1b), Z(0x94), Z(0x00), Z(0x42),
206 Z(0xcf), Z(0x4b), Z(0x00), Z(0x75), Z(0xba), Z(0x8f), Z(0x76), Z(0x5f),
207 Z(0x5d), Z(0x3a), Z(0x4d), Z(0x09), Z(0x12), Z(0x08), Z(0x38), Z(0x95),
208 Z(0x17), Z(0xe4), Z(0x01), Z(0x1d), Z(0x4c), Z(0xa9), Z(0xcc), Z(0x85),
209 Z(0x82), Z(0x4c), Z(0x9d), Z(0x2f), Z(0x3b), Z(0x66), Z(0xa1), Z(0x34),
210 Z(0x10), Z(0xcd), Z(0x59), Z(0x89), Z(0xa5), Z(0x31), Z(0xcf), Z(0x05),
211 Z(0xc8), Z(0x84), Z(0xfa), Z(0xc7), Z(0xba), Z(0x4e), Z(0x8b), Z(0x1a),
212 Z(0x19), Z(0xf1), Z(0xa1), Z(0x3b), Z(0x18), Z(0x12), Z(0x17), Z(0xb0),
213 Z(0x98), Z(0x8d), Z(0x0b), Z(0x23), Z(0xc3), Z(0x3a), Z(0x2d), Z(0x20),
214 Z(0xdf), Z(0x13), Z(0xa0), Z(0xa8), Z(0x4c), Z(0x0d), Z(0x6c), Z(0x2f),
215 Z(0x47), Z(0x13), Z(0x13), Z(0x52), Z(0x1f), Z(0x2d), Z(0xf5), Z(0x79),
216 Z(0x3d), Z(0xa2), Z(0x54), Z(0xbd), Z(0x69), Z(0xc8), Z(0x6b), Z(0xf3),
217 Z(0x05), Z(0x28), Z(0xf1), Z(0x16), Z(0x46), Z(0x40), Z(0xb0), Z(0x11),
218 Z(0xd3), Z(0xb7), Z(0x95), Z(0x49), Z(0xcf), Z(0xc3), Z(0x1d), Z(0x8f),
219 Z(0xd8), Z(0xe1), Z(0x73), Z(0xdb), Z(0xad), Z(0xc8), Z(0xc9), Z(0xa9),
220 Z(0xa1), Z(0xc2), Z(0xc5), Z(0xe3), Z(0xba), Z(0xfc), Z(0x0e), Z(0x25)
221 };
222
223
224
225
226 #define F_ENCRYPT(R, L, sched) \
227 do { \
228 union lc4 { __be32 l; u8 c[4]; } u; \
229 u.l = sched ^ R; \
230 L ^= sbox0[u.c[0]] ^ sbox1[u.c[1]] ^ sbox2[u.c[2]] ^ sbox3[u.c[3]]; \
231 } while (0)
232
233
234
235
236 static void fcrypt_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
237 {
238 const struct fcrypt_ctx *ctx = crypto_tfm_ctx(tfm);
239 struct {
240 __be32 l, r;
241 } X;
242
243 memcpy(&X, src, sizeof(X));
244
245 F_ENCRYPT(X.r, X.l, ctx->sched[0x0]);
246 F_ENCRYPT(X.l, X.r, ctx->sched[0x1]);
247 F_ENCRYPT(X.r, X.l, ctx->sched[0x2]);
248 F_ENCRYPT(X.l, X.r, ctx->sched[0x3]);
249 F_ENCRYPT(X.r, X.l, ctx->sched[0x4]);
250 F_ENCRYPT(X.l, X.r, ctx->sched[0x5]);
251 F_ENCRYPT(X.r, X.l, ctx->sched[0x6]);
252 F_ENCRYPT(X.l, X.r, ctx->sched[0x7]);
253 F_ENCRYPT(X.r, X.l, ctx->sched[0x8]);
254 F_ENCRYPT(X.l, X.r, ctx->sched[0x9]);
255 F_ENCRYPT(X.r, X.l, ctx->sched[0xa]);
256 F_ENCRYPT(X.l, X.r, ctx->sched[0xb]);
257 F_ENCRYPT(X.r, X.l, ctx->sched[0xc]);
258 F_ENCRYPT(X.l, X.r, ctx->sched[0xd]);
259 F_ENCRYPT(X.r, X.l, ctx->sched[0xe]);
260 F_ENCRYPT(X.l, X.r, ctx->sched[0xf]);
261
262 memcpy(dst, &X, sizeof(X));
263 }
264
265
266
267
268 static void fcrypt_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
269 {
270 const struct fcrypt_ctx *ctx = crypto_tfm_ctx(tfm);
271 struct {
272 __be32 l, r;
273 } X;
274
275 memcpy(&X, src, sizeof(X));
276
277 F_ENCRYPT(X.l, X.r, ctx->sched[0xf]);
278 F_ENCRYPT(X.r, X.l, ctx->sched[0xe]);
279 F_ENCRYPT(X.l, X.r, ctx->sched[0xd]);
280 F_ENCRYPT(X.r, X.l, ctx->sched[0xc]);
281 F_ENCRYPT(X.l, X.r, ctx->sched[0xb]);
282 F_ENCRYPT(X.r, X.l, ctx->sched[0xa]);
283 F_ENCRYPT(X.l, X.r, ctx->sched[0x9]);
284 F_ENCRYPT(X.r, X.l, ctx->sched[0x8]);
285 F_ENCRYPT(X.l, X.r, ctx->sched[0x7]);
286 F_ENCRYPT(X.r, X.l, ctx->sched[0x6]);
287 F_ENCRYPT(X.l, X.r, ctx->sched[0x5]);
288 F_ENCRYPT(X.r, X.l, ctx->sched[0x4]);
289 F_ENCRYPT(X.l, X.r, ctx->sched[0x3]);
290 F_ENCRYPT(X.r, X.l, ctx->sched[0x2]);
291 F_ENCRYPT(X.l, X.r, ctx->sched[0x1]);
292 F_ENCRYPT(X.r, X.l, ctx->sched[0x0]);
293
294 memcpy(dst, &X, sizeof(X));
295 }
296
297
298
299
300
301
302
303 static int fcrypt_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
304 {
305 struct fcrypt_ctx *ctx = crypto_tfm_ctx(tfm);
306
307 #if BITS_PER_LONG == 64
308
309
310
311 u64 k;
312
313
314 k = (*key++) >> 1;
315 k <<= 7;
316 k |= (*key++) >> 1;
317 k <<= 7;
318 k |= (*key++) >> 1;
319 k <<= 7;
320 k |= (*key++) >> 1;
321 k <<= 7;
322 k |= (*key++) >> 1;
323 k <<= 7;
324 k |= (*key++) >> 1;
325 k <<= 7;
326 k |= (*key++) >> 1;
327 k <<= 7;
328 k |= (*key) >> 1;
329
330
331 ctx->sched[0x0] = cpu_to_be32(k); ror56_64(k, 11);
332 ctx->sched[0x1] = cpu_to_be32(k); ror56_64(k, 11);
333 ctx->sched[0x2] = cpu_to_be32(k); ror56_64(k, 11);
334 ctx->sched[0x3] = cpu_to_be32(k); ror56_64(k, 11);
335 ctx->sched[0x4] = cpu_to_be32(k); ror56_64(k, 11);
336 ctx->sched[0x5] = cpu_to_be32(k); ror56_64(k, 11);
337 ctx->sched[0x6] = cpu_to_be32(k); ror56_64(k, 11);
338 ctx->sched[0x7] = cpu_to_be32(k); ror56_64(k, 11);
339 ctx->sched[0x8] = cpu_to_be32(k); ror56_64(k, 11);
340 ctx->sched[0x9] = cpu_to_be32(k); ror56_64(k, 11);
341 ctx->sched[0xa] = cpu_to_be32(k); ror56_64(k, 11);
342 ctx->sched[0xb] = cpu_to_be32(k); ror56_64(k, 11);
343 ctx->sched[0xc] = cpu_to_be32(k); ror56_64(k, 11);
344 ctx->sched[0xd] = cpu_to_be32(k); ror56_64(k, 11);
345 ctx->sched[0xe] = cpu_to_be32(k); ror56_64(k, 11);
346 ctx->sched[0xf] = cpu_to_be32(k);
347
348 return 0;
349 #else
350 u32 hi, lo;
351
352
353 lo = (*key++) >> 1;
354 lo <<= 7;
355 lo |= (*key++) >> 1;
356 lo <<= 7;
357 lo |= (*key++) >> 1;
358 lo <<= 7;
359 lo |= (*key++) >> 1;
360 hi = lo >> 4;
361 lo &= 0xf;
362 lo <<= 7;
363 lo |= (*key++) >> 1;
364 lo <<= 7;
365 lo |= (*key++) >> 1;
366 lo <<= 7;
367 lo |= (*key++) >> 1;
368 lo <<= 7;
369 lo |= (*key) >> 1;
370
371
372 ctx->sched[0x0] = cpu_to_be32(lo); ror56(hi, lo, 11);
373 ctx->sched[0x1] = cpu_to_be32(lo); ror56(hi, lo, 11);
374 ctx->sched[0x2] = cpu_to_be32(lo); ror56(hi, lo, 11);
375 ctx->sched[0x3] = cpu_to_be32(lo); ror56(hi, lo, 11);
376 ctx->sched[0x4] = cpu_to_be32(lo); ror56(hi, lo, 11);
377 ctx->sched[0x5] = cpu_to_be32(lo); ror56(hi, lo, 11);
378 ctx->sched[0x6] = cpu_to_be32(lo); ror56(hi, lo, 11);
379 ctx->sched[0x7] = cpu_to_be32(lo); ror56(hi, lo, 11);
380 ctx->sched[0x8] = cpu_to_be32(lo); ror56(hi, lo, 11);
381 ctx->sched[0x9] = cpu_to_be32(lo); ror56(hi, lo, 11);
382 ctx->sched[0xa] = cpu_to_be32(lo); ror56(hi, lo, 11);
383 ctx->sched[0xb] = cpu_to_be32(lo); ror56(hi, lo, 11);
384 ctx->sched[0xc] = cpu_to_be32(lo); ror56(hi, lo, 11);
385 ctx->sched[0xd] = cpu_to_be32(lo); ror56(hi, lo, 11);
386 ctx->sched[0xe] = cpu_to_be32(lo); ror56(hi, lo, 11);
387 ctx->sched[0xf] = cpu_to_be32(lo);
388 return 0;
389 #endif
390 }
391
392 static struct crypto_alg fcrypt_alg = {
393 .cra_name = "fcrypt",
394 .cra_driver_name = "fcrypt-generic",
395 .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
396 .cra_blocksize = 8,
397 .cra_ctxsize = sizeof(struct fcrypt_ctx),
398 .cra_module = THIS_MODULE,
399 .cra_alignmask = 3,
400 .cra_u = { .cipher = {
401 .cia_min_keysize = 8,
402 .cia_max_keysize = 8,
403 .cia_setkey = fcrypt_setkey,
404 .cia_encrypt = fcrypt_encrypt,
405 .cia_decrypt = fcrypt_decrypt } }
406 };
407
408 static int __init fcrypt_mod_init(void)
409 {
410 return crypto_register_alg(&fcrypt_alg);
411 }
412
413 static void __exit fcrypt_mod_fini(void)
414 {
415 crypto_unregister_alg(&fcrypt_alg);
416 }
417
418 subsys_initcall(fcrypt_mod_init);
419 module_exit(fcrypt_mod_fini);
420
421 MODULE_LICENSE("Dual BSD/GPL");
422 MODULE_DESCRIPTION("FCrypt Cipher Algorithm");
423 MODULE_AUTHOR("David Howells <dhowells@redhat.com>");
424 MODULE_ALIAS_CRYPTO("fcrypt");