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Update RIPEMD detection to use round constants. #443

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Update RIPEMD detection to use round constants. #443

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28 changes: 12 additions & 16 deletions crypto/crypto_signatures.yar
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Original file line number Diff line number Diff line change
Expand Up @@ -315,23 +315,19 @@ rule RC6_Constants {

rule RIPEMD160_Constants {
meta:
author = "phoul (@phoul)"
description = "Look for RIPEMD-160 constants"
date = "2014-01"
version = "0.1"
author = "Ek0n (@Ek0n)"
description = "Look for RIPEMD-160 round constants"
date = "2024-03"
reference = "https://git.openssl.org/?p=openssl.git;a=blob;f=crypto/ripemd/rmdconst.h"
version = "0.2"
strings:
$c0 = { 67452301 }
$c1 = { EFCDAB89 }
$c2 = { 98BADCFE }
$c3 = { 10325476 }
$c4 = { C3D2E1F0 }
$c5 = { 01234567 }
$c6 = { 89ABCDEF }
$c7 = { FEDCBA98 }
$c8 = { 76543210 }
$c9 = { F0E1D2C3 }
$KR0 = { E68BA250 }
$KR1 = { 24D14D5C }
$KR2 = { F33E706D }
$KR3 = { E9766D7A }

condition:
5 of them
any of them
}

rule SHA1_Constants {
Expand Down Expand Up @@ -1577,4 +1573,4 @@ rule SipHash_big_endian_constants {
$c3 = "setybdet"
condition:
2 of them
}
}