An encapsulated private key. More...

#include <key.h>

Public Member Functions
	CKey ()
	Construct an invalid private key. More...

	CKey (const CKey &secret)
	Copy constructor. This is necessary because of memlocking. More...

	~CKey ()
	Destructor (again necessary because of memlocking). More...

template<typename T >
void	Set (const T pbegin, const T pend, bool fCompressedIn)
	Initialize using begin and end iterators to byte data. More...

unsigned int	size () const
	Simple read-only vector-like interface. More...

const unsigned char *	begin () const

const unsigned char *	end () const

bool	IsValid () const
	Check whether this private key is valid. More...

bool	IsCompressed () const
	Check whether the public key corresponding to this private key is (to be) compressed. More...

bool	SetPrivKey (const CPrivKey &vchPrivKey, bool fCompressed)
	Initialize from a CPrivKey (serialized OpenSSL private key data). More...

void	MakeNewKey (bool fCompressed)
	Generate a new private key using a cryptographic PRNG. More...

uint256	GetPrivKey_256 ()

CPrivKey	GetPrivKey () const
	Convert the private key to a CPrivKey (serialized OpenSSL private key data). More...

CPubKey	GetPubKey () const
	Compute the public key from a private key. More...

bool	Sign (const uint256 &hash, std::vector< unsigned char > &vchSig, uint32_t test_case=0) const
	Create a DER-serialized signature. More...

bool	SignCompact (const uint256 &hash, std::vector< unsigned char > &vchSig) const
	Create a compact signature (65 bytes), which allows reconstructing the used public key. More...

bool	Derive (CKey &keyChild, unsigned char ccChild[32], unsigned int nChild, const unsigned char cc[32]) const
	Derive BIP32 child key. More...

bool	VerifyPubKey (const CPubKey &vchPubKey) const
	Verify thoroughly whether a private key and a public key match. More...

bool	Load (CPrivKey &privkey, CPubKey &vchPubKey, bool fSkipCheck)
	Load private key and check that public key matches. More...

Static Public Member Functions
static bool	CheckSignatureElement (const unsigned char *vch, int len, bool half)
	Check whether an element of a signature (r or s) is valid. More...

Static Private Member Functions
static bool	Check (const unsigned char *vch)
	Check whether the 32-byte array pointed to be vch is valid keydata. More...

Private Attributes
bool	fValid
	Whether this private key is valid. More...

bool	fCompressed
	Whether the public key corresponding to this private key is (to be) compressed. More...

unsigned char	vch [32]
	The actual byte data. More...

Friends
bool	operator== (const CKey &a, const CKey &b)

Detailed Description

An encapsulated private key.

Definition at line 39 of file key.h.

Constructor & Destructor Documentation

◆ CKey() [1/2]

CKey::CKey ( )

inline

Construct an invalid private key.

Definition at line 57 of file key.h.

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◆ CKey() [2/2]

CKey::CKey ( const CKey & secret )

inline

Copy constructor. This is necessary because of memlocking.

Definition at line 63 of file key.h.

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◆ ~CKey()

CKey::~CKey ( )

inline

Destructor (again necessary because of memlocking).

Definition at line 70 of file key.h.

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Member Function Documentation

◆ begin()

const unsigned char* CKey::begin ( ) const

inline

Definition at line 100 of file key.h.

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◆ Check()

bool CKey::Check ( const unsigned char * vch )

staticprivate

Check whether the 32-byte array pointed to be vch is valid keydata.

Definition at line 35 of file key.cpp.

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◆ CheckSignatureElement()

static bool CKey::CheckSignatureElement	(	const unsigned char *	vch,
		int	len,
		bool	half
	)

static

Check whether an element of a signature (r or s) is valid.

◆ Derive()

bool CKey::Derive	(	CKey &	keyChild,
		unsigned char	ccChild[32],
		unsigned int	nChild,
		const unsigned char	cc[32]
	)		const

Derive BIP32 child key.

Definition at line 159 of file key.cpp.

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◆ end()

const unsigned char* CKey::end ( ) const

inline

Definition at line 101 of file key.h.

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◆ GetPrivKey()

CPrivKey CKey::GetPrivKey ( ) const

Convert the private key to a CPrivKey (serialized OpenSSL private key data).

This is expensive.

Definition at line 66 of file key.cpp.

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◆ GetPrivKey_256()

uint256 CKey::GetPrivKey_256 ( )

Definition at line 58 of file key.cpp.

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◆ GetPubKey()

CPubKey CKey::GetPubKey ( ) const

Compute the public key from a private key.

This is expensive.

Definition at line 79 of file key.cpp.

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◆ IsCompressed()

bool CKey::IsCompressed ( ) const

inline

Check whether the public key corresponding to this private key is (to be) compressed.

Definition at line 107 of file key.h.

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◆ IsValid()

bool CKey::IsValid ( ) const

inline

Check whether this private key is valid.

Definition at line 104 of file key.h.

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◆ Load()

bool CKey::Load	(	CPrivKey &	privkey,
		CPubKey &	vchPubKey,
		bool	fSkipCheck = `false`
	)

Load private key and check that public key matches.

Definition at line 146 of file key.cpp.

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◆ MakeNewKey()

void CKey::MakeNewKey ( bool fCompressed )

Generate a new private key using a cryptographic PRNG.

Definition at line 40 of file key.cpp.

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◆ Set()

template<typename T >

void CKey::Set	(	const T	pbegin,
		const T	pend,
		bool	fCompressedIn
	)

inline

Initialize using begin and end iterators to byte data.

Definition at line 83 of file key.h.

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◆ SetPrivKey()

bool CKey::SetPrivKey	(	const CPrivKey &	vchPrivKey,
		bool	fCompressed
	)

Initialize from a CPrivKey (serialized OpenSSL private key data).

Definition at line 49 of file key.cpp.

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◆ Sign()

bool CKey::Sign	(	const uint256 &	hash,
		std::vector< unsigned char > &	vchSig,
		uint32_t	test_case = `0`
	)		const

Create a DER-serialized signature.

The test_case parameter tweaks the deterministic nonce, and is only for testing. It should be zero for normal use.

Definition at line 91 of file key.cpp.

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◆ SignCompact()

bool CKey::SignCompact	(	const uint256 &	hash,
		std::vector< unsigned char > &	vchSig
	)		const

Create a compact signature (65 bytes), which allows reconstructing the used public key.

The format is one header byte, followed by two times 32 bytes for the serialized r and s values. The header byte: 0x1B = first key with even y, 0x1C = first key with odd y, 0x1D = second key with even y, 0x1E = second key with odd y, add 0x04 for compressed keys.

Definition at line 126 of file key.cpp.

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◆ size()

unsigned int CKey::size ( ) const

inline

Simple read-only vector-like interface.

Definition at line 99 of file key.h.

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◆ VerifyPubKey()

bool CKey::VerifyPubKey ( const CPubKey & vchPubKey ) const

Verify thoroughly whether a private key and a public key match.

This is done using a different mechanism than just regenerating it.

Definition at line 111 of file key.cpp.

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Friends And Related Function Documentation

◆ operator==

bool operator==	(	const CKey &	a,
		const CKey &	b
	)

friend

Definition at line 75 of file key.h.

Member Data Documentation

◆ fCompressed

bool CKey::fCompressed

private

Whether the public key corresponding to this private key is (to be) compressed.

Definition at line 47 of file key.h.

◆ fValid

bool CKey::fValid

private

Whether this private key is valid.

We check for correctness when modifying the key data, so fValid should always correspond to the actual state.

Definition at line 44 of file key.h.

◆ vch

unsigned char CKey::vch[32]

private

The actual byte data.

Definition at line 50 of file key.h.

The documentation for this class was generated from the following files:

src/key.h
src/key.cpp

Public Member Functions

Static Public Member Functions

Static Private Member Functions

Private Attributes

Friends

Detailed Description

Constructor & Destructor Documentation

◆ CKey() [1/2]

◆ CKey() [2/2]

◆ ~CKey()

Member Function Documentation

◆ begin()

◆ Check()

◆ CheckSignatureElement()

◆ Derive()

◆ end()

◆ GetPrivKey()

◆ GetPrivKey_256()

◆ GetPubKey()

◆ IsCompressed()

◆ IsValid()

◆ Load()

◆ MakeNewKey()

◆ Set()

◆ SetPrivKey()

◆ Sign()

◆ SignCompact()

◆ size()

◆ VerifyPubKey()

Friends And Related Function Documentation

◆ operator==

Member Data Documentation

◆ fCompressed

◆ fValid

◆ vch