1 // dh2.cpp - originally written and placed in the public domain by Wei Dai
2
3 #include "pch.h"
4 #include "cryptlib.h"
5 #include "misc.h"
6 #include "dh2.h"
7
8 NAMESPACE_BEGIN(CryptoPP)
9
10 #if defined(CRYPTOPP_DEBUG) && !defined(CRYPTOPP_DOXYGEN_PROCESSING)
11 struct NullCryptoParameters : public CryptoParameters
12 {
AssignFromNullCryptoParameters13 void AssignFrom(const NameValuePairs &source) {
14 CRYPTOPP_UNUSED(source);
15 }
ValidateNullCryptoParameters16 bool Validate(RandomNumberGenerator &rng, unsigned int level) const {
17 CRYPTOPP_UNUSED(rng); CRYPTOPP_UNUSED(level);
18 return false;
19 }
GetVoidValueNullCryptoParameters20 bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const {
21 CRYPTOPP_UNUSED(name); CRYPTOPP_UNUSED(valueType); CRYPTOPP_UNUSED(pValue);
22 return false;
23 }
24 };
25
26 struct NullSimpleKeyAgreementDomain : public TwoBases<NullCryptoParameters, SimpleKeyAgreementDomain>
27 {
AccessCryptoParametersNullSimpleKeyAgreementDomain28 CryptoParameters & AccessCryptoParameters() {
29 return *this;
30 }
AgreedValueLengthNullSimpleKeyAgreementDomain31 unsigned int AgreedValueLength() const {
32 return 1;
33 }
PrivateKeyLengthNullSimpleKeyAgreementDomain34 unsigned int PrivateKeyLength() const {
35 return 1;
36 }
PublicKeyLengthNullSimpleKeyAgreementDomain37 unsigned int PublicKeyLength() const {
38 return 1;
39 }
GeneratePrivateKeyNullSimpleKeyAgreementDomain40 void GeneratePrivateKey(RandomNumberGenerator &rng, byte *privateKey) const {
41 CRYPTOPP_UNUSED(rng); CRYPTOPP_UNUSED(privateKey);
42 }
GeneratePublicKeyNullSimpleKeyAgreementDomain43 void GeneratePublicKey(RandomNumberGenerator &rng, const byte *privateKey, byte *publicKey) const {
44 CRYPTOPP_UNUSED(rng); CRYPTOPP_UNUSED(privateKey); CRYPTOPP_UNUSED(publicKey);
45 }
AgreeNullSimpleKeyAgreementDomain46 bool Agree(byte *agreedValue, const byte *privateKey, const byte *otherPublicKey, bool validateOtherPublicKey=true) const {
47 CRYPTOPP_UNUSED(agreedValue); CRYPTOPP_UNUSED(privateKey);
48 CRYPTOPP_UNUSED(otherPublicKey); CRYPTOPP_UNUSED(validateOtherPublicKey);
49 return false;
50 }
51 };
52
DH2_TestInstantiations()53 void DH2_TestInstantiations()
54 {
55 NullSimpleKeyAgreementDomain dom;
56 DH2 dh(dom);
57 }
58 #endif
59
Agree(byte * agreedValue,const byte * staticSecretKey,const byte * ephemeralSecretKey,const byte * staticOtherPublicKey,const byte * ephemeralOtherPublicKey,bool validateStaticOtherPublicKey) const60 bool DH2::Agree(byte *agreedValue,
61 const byte *staticSecretKey, const byte *ephemeralSecretKey,
62 const byte *staticOtherPublicKey, const byte *ephemeralOtherPublicKey,
63 bool validateStaticOtherPublicKey) const
64 {
65 return d1.Agree(agreedValue, staticSecretKey, staticOtherPublicKey, validateStaticOtherPublicKey)
66 && d2.Agree(agreedValue+d1.AgreedValueLength(), ephemeralSecretKey, ephemeralOtherPublicKey, true);
67 }
68
69 NAMESPACE_END
70