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In MD5_native::transform disable sanitizer unsigned integer overflow checks

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Wrap-around is intentional and generates false positives
This commit is contained in:
m-holger 2024-07-22 13:11:07 +01:00
parent b3ab5cd216
commit 4f16961052
1 changed files with 5 additions and 0 deletions
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5
libqpdf/MD5_native.cc
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@ -193,7 +193,12 @@ MD5_native::digest(Digest result)
} }
// MD5 basic transformation. Transforms state based on block. // MD5 basic transformation. Transforms state based on block.
//
// NB The algorithm intentionally relies on unsigned integer wrap-around
void MD5_native::transform(uint32_t state[4], unsigned char block[64]) void MD5_native::transform(uint32_t state[4], unsigned char block[64])
#if defined(__clang__)
__attribute__((no_sanitize("unsigned-integer-overflow")))
#endif
{ {
uint32_t a = state[0], b = state[1], c = state[2], d = state[3], x[16]; uint32_t a = state[0], b = state[1], c = state[2], d = state[3], x[16];