feedc0de/wolfssl
1
0
Fork 0
forked from wolfSSL/wolfssl
Code Pull Requests Activity

SHA-512 ARM NEON: ensure data being hashed is 64-bit aligned

Browse Source
This commit is contained in:
Sean Parkinson
2022-07-06 16:18:18 +10:00
parent 9a256ca002
commit 8b73feb8ef
1 changed files with 19 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
wolfcrypt/src/port/arm/armv8-sha512.c
View File

@@ -472,7 +472,25 @@ static WC_INLINE int Sha512Update(wc_Sha512* sha512, const byte* data, word32 le
blocksLen = len & ~(WC_SHA512_BLOCK_SIZE-1);
if (blocksLen > 0) {
/* Byte reversal performed in function if required. */
Transform_Sha512_Len(sha512, data, blocksLen);
#ifndef WOLFSSL_ARMASM_NO_NEON
/* Data must be 64-bit aligned to be passed to Transform_Sha512_Len().
* 64 bits is 8 bytes.
*/
if (((size_t)data & 0x7) != 0) {
word32 i;
for (i = 0; i < blocksLen; i += WC_SHA512_BLOCK_SIZE) {
word64 buffer[WC_SHA512_BLOCK_SIZE / sizeof(word64)];
XMEMCPY(buffer, data + i, WC_SHA512_BLOCK_SIZE);
Transform_Sha512_Len(sha512, (const byte*)buffer,
WC_SHA512_BLOCK_SIZE);
}
}
else
#endif
{
Transform_Sha512_Len(sha512, data, blocksLen);
}
data += blocksLen;
len -= blocksLen;
}