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-rw-r--r--src/key.h28
1 files changed, 16 insertions, 12 deletions
diff --git a/src/key.h b/src/key.h
index b4f48d59f5..0f58e24a49 100644
--- a/src/key.h
+++ b/src/key.h
@@ -15,7 +15,7 @@
#include <vector>
-/**
+/**
* secp256k1:
* const unsigned int PRIVATE_KEY_SIZE = 279;
* const unsigned int PUBLIC_KEY_SIZE = 65;
@@ -45,6 +45,8 @@ private:
//! The actual byte data
unsigned char vch[32];
+ static_assert(sizeof(vch) == 32, "vch must be 32 bytes in length to not break serialization");
+
//! Check whether the 32-byte array pointed to be vch is valid keydata.
bool static Check(const unsigned char* vch);
@@ -70,20 +72,19 @@ public:
friend bool operator==(const CKey& a, const CKey& b)
{
- return a.fCompressed == b.fCompressed && a.size() == b.size() &&
- memcmp(&a.vch[0], &b.vch[0], a.size()) == 0;
+ return a.fCompressed == b.fCompressed &&
+ a.size() == b.size() &&
+ memcmp(&a.vch[0], &b.vch[0], a.size()) == 0;
}
//! Initialize using begin and end iterators to byte data.
template <typename T>
void Set(const T pbegin, const T pend, bool fCompressedIn)
{
- if (pend - pbegin != 32) {
+ if (pend - pbegin != sizeof(vch)) {
fValid = false;
- return;
- }
- if (Check(&pbegin[0])) {
- memcpy(vch, (unsigned char*)&pbegin[0], 32);
+ } else if (Check(&pbegin[0])) {
+ memcpy(vch, (unsigned char*)&pbegin[0], sizeof(vch));
fValid = true;
fCompressed = fCompressedIn;
} else {
@@ -92,7 +93,7 @@ public:
}
//! Simple read-only vector-like interface.
- unsigned int size() const { return (fValid ? 32 : 0); }
+ unsigned int size() const { return (fValid ? sizeof(vch) : 0); }
const unsigned char* begin() const { return vch; }
const unsigned char* end() const { return vch + size(); }
@@ -110,7 +111,7 @@ public:
/**
* Convert the private key to a CPrivKey (serialized OpenSSL private key data).
- * This is expensive.
+ * This is expensive.
*/
CPrivKey GetPrivKey() const;
@@ -160,8 +161,11 @@ struct CExtKey {
friend bool operator==(const CExtKey& a, const CExtKey& b)
{
- return a.nDepth == b.nDepth && memcmp(&a.vchFingerprint[0], &b.vchFingerprint[0], 4) == 0 && a.nChild == b.nChild &&
- a.chaincode == b.chaincode && a.key == b.key;
+ return a.nDepth == b.nDepth &&
+ memcmp(&a.vchFingerprint[0], &b.vchFingerprint[0], sizeof(vchFingerprint)) == 0 &&
+ a.nChild == b.nChild &&
+ a.chaincode == b.chaincode &&
+ a.key == b.key;
}
void Encode(unsigned char code[BIP32_EXTKEY_SIZE]) const;