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Fix "warning: binding dereferenced null pointer to reference has undefined behavior"

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This shows up under debug builds when testing instantiations.

 warning: binding dereferenced null pointer to reference has
      undefined behavior [-Wnull-dereference]
        DH2 dh(*(SimpleKeyAgreementDomain*)NULLPTR);
               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This commit is contained in:
Jeffrey Walton 2017-08-16 20:49:03 -04:00
parent b8e794cc6d
commit 5a32fbbeba
No known key found for this signature in database
GPG Key ID: B36AB348921B1838
1 changed files with 39 additions and 1 deletions
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40
dh2.cpp
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@ -1,14 +1,52 @@
// dh2.cpp - originally written and placed in the public domain by Wei Dai
#include "pch.h"
#include "cryptlib.h"
#include "misc.h"
#include "dh2.h"
NAMESPACE_BEGIN(CryptoPP)
#if defined(CRYPTOPP_DEBUG) && !defined(CRYPTOPP_DOXYGEN_PROCESSING)
struct NullCryptoParameters : public CryptoParameters
{
void AssignFrom(const NameValuePairs &source) {
}
bool Validate(RandomNumberGenerator &rng, unsigned int level) const {
return false;
}
bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const {
return false;
}
};
struct NullSimpleKeyAgreementDomain : public TwoBases<NullCryptoParameters, SimpleKeyAgreementDomain>
{
CryptoParameters & AccessCryptoParameters() {
return *this;
}
unsigned int AgreedValueLength() const {
return 1;
}
unsigned int PrivateKeyLength() const {
return 1;
}
unsigned int PublicKeyLength() const {
return 1;
}
void GeneratePrivateKey(RandomNumberGenerator &rng, byte *privateKey) const {
}
void GeneratePublicKey(RandomNumberGenerator &rng, const byte *privateKey, byte *publicKey) const {
}
bool Agree(byte *agreedValue, const byte *privateKey, const byte *otherPublicKey, bool validateOtherPublicKey=true) const {
return false;
}
};
void DH2_TestInstantiations()
{
DH2 dh(*(SimpleKeyAgreementDomain*)NULLPTR);
NullSimpleKeyAgreementDomain dom;
DH2 dh(dom);
}
#endif