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71 lines
2.4 KiB
Plaintext
71 lines
2.4 KiB
Plaintext
import cpp
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import experimental.Quantum.Language
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import EVPHashConsumers
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import OpenSSLAlgorithmGetter
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predicate literalToHashFamilyType(Literal e, Crypto::THashType type) {
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exists(string name, string algType | algType.toLowerCase().matches("hash") |
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resolveAlgorithmFromLiteral(e, name, algType) and
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(
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name.matches("BLAKE2B") and type instanceof Crypto::BLAKE2B
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or
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name.matches("BLAKE2S") and type instanceof Crypto::BLAKE2S
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or
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name.matches("MD2") and type instanceof Crypto::MD2
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or
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name.matches("MD4") and type instanceof Crypto::MD4
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or
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name.matches("MD5") and type instanceof Crypto::MD5
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or
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name.matches("POLY1305") and type instanceof Crypto::POLY1305
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or
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name.matches(["SHA", "SHA1"]) and type instanceof Crypto::SHA1
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or
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name.matches("SHA+%") and not name.matches(["SHA1", "SHA3-"]) and type instanceof Crypto::SHA2
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or
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name.matches("SHA3-%") and type instanceof Crypto::SHA3
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or
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name.matches(["SHAKE"]) and type instanceof Crypto::SHAKE
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or
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name.matches("SM3") and type instanceof Crypto::SM3
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or
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name.matches("RIPEMD160") and type instanceof Crypto::RIPEMD160
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or
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//or
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//TODO: need to handle MACs differently, including md_GOST94
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// name.matches("%GOST%") and type instanceof Crypto::GOST
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name.matches("WHIRLPOOL") and type instanceof Crypto::WHIRLPOOL
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)
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)
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}
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class HashKnownAlgorithmLiteralAlgorithmInstance extends Crypto::HashAlgorithmInstance instanceof Literal
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{
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OpenSSLAlgorithmGetterCall cipherGetterCall;
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HashKnownAlgorithmLiteralAlgorithmInstance() {
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exists(DataFlow::Node src, DataFlow::Node sink |
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sink = cipherGetterCall.getValueArgNode() and
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src.asExpr() = this and
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KnownAlgorithmLiteralToAlgorithmGetterFlow::flow(src, sink) and
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// Not just any known value, but specifically a known cipher operation
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exists(string algType |
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resolveAlgorithmFromLiteral(src.asExpr(), _, algType) and
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algType.toLowerCase().matches("hash")
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)
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)
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}
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Crypto::AlgorithmConsumer getConsumer() {
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AlgGetterToAlgConsumerFlow::flow(cipherGetterCall.getResultNode(), DataFlow::exprNode(result))
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}
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override Crypto::THashType getHashFamily() {
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literalToHashFamilyType(this, result)
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}
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override string getRawAlgorithmName() { result = this.(Literal).getValue().toString() }
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override int getHashSize() {none() }//TODO
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}
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