Mercurial > dropbear
annotate libtomcrypt/src/encauth/ocb/ocb_shift_xor.c @ 1749:32307118bc26
Add ubsan fuzz run to Travis CI too
author | Matt Johnston <matt@ucc.asn.au> |
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date | Mon, 19 Oct 2020 23:38:11 +0800 |
parents | 6dba84798cd5 |
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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis |
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2 * |
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3 * LibTomCrypt is a library that provides various cryptographic |
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4 * algorithms in a highly modular and flexible manner. |
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5 * |
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6 * The library is free for all purposes without any express |
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7 * guarantee it works. |
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8 */ |
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9 |
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10 /** |
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11 @file ocb_shift_xor.c |
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12 OCB implementation, internal function, by Tom St Denis |
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13 */ |
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14 #include "tomcrypt.h" |
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15 |
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16 #ifdef LTC_OCB_MODE |
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17 |
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18 /** |
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19 Compute the shift/xor for OCB (internal function) |
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20 @param ocb The OCB state |
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21 @param Z The destination of the shift |
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22 */ |
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23 void ocb_shift_xor(ocb_state *ocb, unsigned char *Z) |
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24 { |
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25 int x, y; |
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26 y = ocb_ntz(ocb->block_index++); |
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27 for (x = 0; x < ocb->block_len; x++) { |
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28 ocb->Li[x] ^= ocb->Ls[y][x]; |
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29 Z[x] = ocb->Li[x] ^ ocb->R[x]; |
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30 } |
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31 } |
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32 |
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33 #endif |
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34 |
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35 /* ref: $Format:%D$ */ |
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36 /* git commit: $Format:%H$ */ |
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37 /* commit time: $Format:%ai$ */ |