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Fixed random32_unbiased

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This commit is contained in:
SChernykh 2021-06-16 00:19:49 +02:00
parent 89bc6418b1
commit 3003c067d3
1 changed files with 5 additions and 2 deletions
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7
src/base/tools/cryptonote/Signatures.cpp
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@ -51,13 +51,16 @@ static void random32_unbiased(uint8_t* bytes)
// l fits 15 times in 32 bytes (iow, 15 l is the highest multiple of l that fits in 32 bytes) // l fits 15 times in 32 bytes (iow, 15 l is the highest multiple of l that fits in 32 bytes)
static const uint8_t limit[32] = { 0xe3, 0x6a, 0x67, 0x72, 0x8b, 0xce, 0x13, 0x29, 0x8f, 0x30, 0x82, 0x8c, 0x0b, 0xa4, 0x10, 0x39, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0 }; static const uint8_t limit[32] = { 0xe3, 0x6a, 0x67, 0x72, 0x8b, 0xce, 0x13, 0x29, 0x8f, 0x30, 0x82, 0x8c, 0x0b, 0xa4, 0x10, 0x39, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0 };
do { for (;;) {
xmrig::Cvt::randomBytes(bytes, 32); xmrig::Cvt::randomBytes(bytes, 32);
if (!less32(bytes, limit)) { if (!less32(bytes, limit)) {
continue; continue;
} }
sc_reduce32(bytes); sc_reduce32(bytes);
} while (!sc_isnonzero(bytes)); if (sc_isnonzero(bytes)) {
break;
}
}
} }