3  * cast6.c - Cast6 cipher algorithm [rfc2612].
9  * Copyright (C) 2003 Kartikey Mahendra Bhatt <kartik_me@hotmail.com>.
85 static const u8 Tr[4][8] = {
96 	key[6] ^= F1(key[7], Tr[i % 4][0], Tm[i][0]);  in W()
97 	key[5] ^= F2(key[6], Tr[i % 4][1], Tm[i][1]);  in W()
98 	key[4] ^= F3(key[5], Tr[i % 4][2], Tm[i][2]);  in W()
99 	key[3] ^= F1(key[4], Tr[i % 4][3], Tm[i][3]);  in W()
100 	key[2] ^= F2(key[3], Tr[i % 4][4], Tm[i][4]);  in W()
101 	key[1] ^= F3(key[2], Tr[i % 4][5], Tm[i][5]);  in W()
102 	key[0] ^= F1(key[1], Tr[i % 4][6], Tm[i][6]);  in W()
103 	key[7] ^= F2(key[0], Tr[i % 4][7], Tm[i][7]);  in W()
106 int __cast6_setkey(struct cast6_ctx *c, const u8 *in_key, unsigned int key_len)  in __cast6_setkey()  argument
112 	if (key_len % 4 != 0)  in __cast6_setkey()
120 	key[2] = be32_to_cpu(p_key[2]);		/* C */  in __cast6_setkey()
122 	key[4] = be32_to_cpu(p_key[4]);		/* E */  in __cast6_setkey()
131 		c->Kr[i][0] = key[0] & 0x1f;  in __cast6_setkey()
132 		c->Kr[i][1] = key[2] & 0x1f;  in __cast6_setkey()
133 		c->Kr[i][2] = key[4] & 0x1f;  in __cast6_setkey()
134 		c->Kr[i][3] = key[6] & 0x1f;  in __cast6_setkey()
136 		c->Km[i][0] = key[7];  in __cast6_setkey()
137 		c->Km[i][1] = key[5];  in __cast6_setkey()
138 		c->Km[i][2] = key[3];  in __cast6_setkey()
139 		c->Km[i][3] = key[1];  in __cast6_setkey()
174 	const struct cast6_ctx *c = ctx;  in __cast6_encrypt()  local
175 	u32 block[4];  in __cast6_encrypt()
180 	block[1] = get_unaligned_be32(inbuf + 4);  in __cast6_encrypt()
184 	Km = c->Km[0]; Kr = c->Kr[0]; Q(block, Kr, Km);  in __cast6_encrypt()
185 	Km = c->Km[1]; Kr = c->Kr[1]; Q(block, Kr, Km);  in __cast6_encrypt()
186 	Km = c->Km[2]; Kr = c->Kr[2]; Q(block, Kr, Km);  in __cast6_encrypt()
187 	Km = c->Km[3]; Kr = c->Kr[3]; Q(block, Kr, Km);  in __cast6_encrypt()
188 	Km = c->Km[4]; Kr = c->Kr[4]; Q(block, Kr, Km);  in __cast6_encrypt()
189 	Km = c->Km[5]; Kr = c->Kr[5]; Q(block, Kr, Km);  in __cast6_encrypt()
190 	Km = c->Km[6]; Kr = c->Kr[6]; QBAR(block, Kr, Km);  in __cast6_encrypt()
191 	Km = c->Km[7]; Kr = c->Kr[7]; QBAR(block, Kr, Km);  in __cast6_encrypt()
192 	Km = c->Km[8]; Kr = c->Kr[8]; QBAR(block, Kr, Km);  in __cast6_encrypt()
193 	Km = c->Km[9]; Kr = c->Kr[9]; QBAR(block, Kr, Km);  in __cast6_encrypt()
194 	Km = c->Km[10]; Kr = c->Kr[10]; QBAR(block, Kr, Km);  in __cast6_encrypt()
195 	Km = c->Km[11]; Kr = c->Kr[11]; QBAR(block, Kr, Km);  in __cast6_encrypt()
198 	put_unaligned_be32(block[1], outbuf + 4);  in __cast6_encrypt()
211 	const struct cast6_ctx *c = ctx;  in __cast6_decrypt()  local
212 	u32 block[4];  in __cast6_decrypt()
217 	block[1] = get_unaligned_be32(inbuf + 4);  in __cast6_decrypt()
221 	Km = c->Km[11]; Kr = c->Kr[11]; Q(block, Kr, Km);  in __cast6_decrypt()
222 	Km = c->Km[10]; Kr = c->Kr[10]; Q(block, Kr, Km);  in __cast6_decrypt()
223 	Km = c->Km[9]; Kr = c->Kr[9]; Q(block, Kr, Km);  in __cast6_decrypt()
224 	Km = c->Km[8]; Kr = c->Kr[8]; Q(block, Kr, Km);  in __cast6_decrypt()
225 	Km = c->Km[7]; Kr = c->Kr[7]; Q(block, Kr, Km);  in __cast6_decrypt()
226 	Km = c->Km[6]; Kr = c->Kr[6]; Q(block, Kr, Km);  in __cast6_decrypt()
227 	Km = c->Km[5]; Kr = c->Kr[5]; QBAR(block, Kr, Km);  in __cast6_decrypt()
228 	Km = c->Km[4]; Kr = c->Kr[4]; QBAR(block, Kr, Km);  in __cast6_decrypt()
229 	Km = c->Km[3]; Kr = c->Kr[3]; QBAR(block, Kr, Km);  in __cast6_decrypt()
230 	Km = c->Km[2]; Kr = c->Kr[2]; QBAR(block, Kr, Km);  in __cast6_decrypt()
231 	Km = c->Km[1]; Kr = c->Kr[1]; QBAR(block, Kr, Km);  in __cast6_decrypt()
232 	Km = c->Km[0]; Kr = c->Kr[0]; QBAR(block, Kr, Km);  in __cast6_decrypt()
235 	put_unaligned_be32(block[1], outbuf + 4);  in __cast6_decrypt()