mirror of
https://github.com/libtom/libtomcrypt
synced 2026-08-25 20:26:07 -04:00
c727c4032a
As it might be dangerous to use it.
This introduces `LTC_FAST_TYPE_{ASSIGN,MASK,XOR{2,3}}()` in order to
replace the potential unaligned loads.
This fixes the following UBSAN errors:
src/modes/ctr/ctr_encrypt.c:56:66: runtime error: load of misaligned address 0x7ffea07ee82f for type 'LTC_FAST_TYPE', which requires 8 byte alignment
src/modes/ctr/ctr_encrypt.c:56:64: runtime error: store to misaligned address 0x7ffea07ee82f for type 'LTC_FAST_TYPE', which requires 8 byte alignment
tests/store_test.c:66:91: runtime error: load of misaligned address 0x7ffdd32f0d9f for type 'LTC_FAST_TYPE', which requires 8 byte alignment
tests/store_test.c:66:52: runtime error: load of misaligned address 0x7ffdd32f0d71 for type 'LTC_FAST_TYPE', which requires 8 byte alignment
tests/store_test.c:66:50: runtime error: store to misaligned address 0x7ffdd32f0dc1 for type 'LTC_FAST_TYPE', which requires 8 byte alignment
src/mac/pmac/pmac_process.c:40:50: runtime error: load of misaligned address 0x57c89c4329ec for type 'LTC_FAST_TYPE', which requires 8 byte alignment
src/mac/xcbc/xcbc_process.c:35:60: runtime error: load of misaligned address 0x57c89c432ccc for type 'LTC_FAST_TYPE', which requires 8 byte alignment
src/mac/f9/f9_process.c:39:58: runtime error: load of misaligned address 0x5c2b1a1d2c14 for type 'LTC_FAST_TYPE', which requires 8 byte alignment
src/encauth/gcm/gcm_process.c:82:58: runtime error: load of misaligned address 0x596b3e6aa354 for type 'LTC_FAST_TYPE', which requires 8 byte alignment
31 lines
739 B
C
31 lines
739 B
C
/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
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/* SPDX-License-Identifier: Unlicense */
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#include "tomcrypt_private.h"
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/**
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@file pmac_shift_xor.c
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PMAC implementation, internal function, by Tom St Denis
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*/
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#ifdef LTC_PMAC
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/**
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Internal function. Performs the state update (adding correct multiple)
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@param pmac The PMAC state.
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*/
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void pmac_shift_xor(pmac_state *pmac)
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{
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int x, y;
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y = pmac_ntz(pmac->block_index++);
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#ifdef LTC_FAST
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for (x = 0; x < pmac->block_len; x += sizeof(LTC_FAST_TYPE)) {
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LTC_FAST_TYPE_XOR2((unsigned char *)pmac->Li + x, (unsigned char *)pmac->Ls[y] + x);
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}
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#else
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for (x = 0; x < pmac->block_len; x++) {
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pmac->Li[x] ^= pmac->Ls[y][x];
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}
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#endif
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}
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#endif
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