mirror of
https://github.com/rn10950/RetroZilla.git
synced 2024-11-16 04:20:32 +01:00
129 lines
3.7 KiB
C
129 lines
3.7 KiB
C
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef HEADER_SEED_H
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#define HEADER_SEED_H
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#include <string.h>
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#include "blapi.h"
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#if !defined(NO_SYS_TYPES_H)
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# include <sys/types.h>
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#endif
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typedef PRUint32 seed_word;
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#define G_FUNC(v) \
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SS[0][((v) & 0xff)] ^ \
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SS[1][((v)>> 8 & 0xff)] ^ \
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SS[2][((v)>>16 & 0xff)] ^ \
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SS[3][((v)>>24 & 0xff)]
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#define char2word(c, i) \
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(i) = ((((seed_word)((c)[0])) << 24) | \
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(((seed_word)((c)[1])) << 16) | \
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(((seed_word)((c)[2])) << 8) | \
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((seed_word)((c)[3])))
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#define word2char(l, c) \
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*((c)+0) = (unsigned char)((l)>>24); \
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*((c)+1) = (unsigned char)((l)>>16); \
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*((c)+2) = (unsigned char)((l)>> 8); \
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*((c)+3) = (unsigned char)((l) )
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#define KEYSCHEDULE_UPDATE0(T0, T1, K0, K1, K2, K3, KC) \
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(T0) = (K2); \
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(K2) = (((K2)<<8) ^ ((K3)>>24)); \
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(K3) = (((K3)<<8) ^ ((T0)>>24)); \
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(T0) = ((K0) + (K2) - (KC)); \
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(T1) = ((K1) + (KC) - (K3))
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#define KEYSCHEDULE_UPDATE1(T0, T1, K0, K1, K2, K3, KC) \
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(T0) = (K0); \
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(K0) = (((K0)>>8) ^ ((K1)<<24)); \
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(K1) = (((K1)>>8) ^ ((T0)<<24)); \
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(T0) = ((K0) + (K2) - (KC)); \
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(T1) = ((K1) + (KC) - (K3))
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#define KEYUPDATE_TEMP(T0, T1, K) \
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(K)[0] = G_FUNC((T0)); \
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(K)[1] = G_FUNC((T1))
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#define XOR_SEEDBLOCK(DST, SRC) \
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(DST)[0] ^= (SRC)[0]; \
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(DST)[1] ^= (SRC)[1]; \
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(DST)[2] ^= (SRC)[2]; \
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(DST)[3] ^= (SRC)[3]
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#define MOV_SEEDBLOCK(DST, SRC) \
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(DST)[0] = (SRC)[0]; \
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(DST)[1] = (SRC)[1]; \
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(DST)[2] = (SRC)[2]; \
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(DST)[3] = (SRC)[3]
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# define CHAR2WORD(C, I) \
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char2word((C), (I)[0]); \
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char2word((C)+4, (I)[1]); \
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char2word((C)+8, (I)[2]); \
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char2word((C)+12, (I)[3])
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# define WORD2CHAR(I, C) \
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word2char((I)[0], (C)); \
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word2char((I)[1], (C+4)); \
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word2char((I)[2], (C+8)); \
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word2char((I)[3], (C+12))
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# define E_SEED(T0, T1, X1, X2, X3, X4, rbase) \
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(T0) = (X3) ^ (ks->data)[(rbase)]; \
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(T1) = (X4) ^ (ks->data)[(rbase)+1]; \
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(T1) ^= (T0); \
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(T1) = G_FUNC(T1); \
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(T0) += (T1); \
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(T0) = G_FUNC(T0); \
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(T1) += (T0); \
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(T1) = G_FUNC(T1); \
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(T0) += (T1); \
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(X1) ^= (T0); \
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(X2) ^= (T1)
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct seed_key_st {
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PRUint32 data[32];
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} SEED_KEY_SCHEDULE;
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struct SEEDContextStr {
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unsigned char iv[SEED_BLOCK_SIZE];
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SEED_KEY_SCHEDULE ks;
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int mode;
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unsigned int encrypt;
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};
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void SEED_set_key(const unsigned char rawkey[SEED_KEY_LENGTH],
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SEED_KEY_SCHEDULE *ks);
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void SEED_encrypt(const unsigned char s[SEED_BLOCK_SIZE],
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unsigned char d[SEED_BLOCK_SIZE],
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const SEED_KEY_SCHEDULE *ks);
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void SEED_decrypt(const unsigned char s[SEED_BLOCK_SIZE],
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unsigned char d[SEED_BLOCK_SIZE],
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const SEED_KEY_SCHEDULE *ks);
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void SEED_ecb_encrypt(const unsigned char *in, unsigned char *out,
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const SEED_KEY_SCHEDULE *ks, int enc);
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void SEED_cbc_encrypt(const unsigned char *in, unsigned char *out,
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size_t len, const SEED_KEY_SCHEDULE *ks,
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unsigned char ivec[SEED_BLOCK_SIZE], int enc);
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#ifdef __cplusplus
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}
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#endif
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#endif /* HEADER_SEED_H */
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