Hi, I'm using Crypto++ for the first time, to do some decryption and
verification. I've downloaded the 5.6.3 release zip.
I've written some test code using the RSA example on the wiki as a basis,
but I'm getting memory leaks reported; unfortunately the leak detector I'm
using only reports the location of the "new", not a full call stack, and
due to Crypto++'s code structure this doesn't help me find the root cause.
The code is fairly straightfoward:
using namespace CryptoPP;
RSA::PrivateKey privateKey;
privateKey.Load(...); // verified this doesn't leak; it's a 3072-bit key
std::string ciphertext(raw_ciphertext, sizeof(raw_ciphertext)); // 384 bytes
RSAES_OAEP_SHA_Decryptor decryptor(privateKey);
AutoSeededRandomPool rng;
SecByteBlock decrypted(decryptor.MaxPlaintextLength(ciphertext.size());
auto result = decryptor.Decrypt(rng, (const uint8_t*)ciphertext.data(),
ciphertext.size(), decrypted);
assert(result.isValidCoding);
decrypted.resize(result.messageLength);
assert(0x20 == result.messageLength);
The resulting decrypted data is correct. but after the function containing
the above exits (so all objects should have been destroyed) I get the
following leaks reported:
Memory leak(s) found.
Alloc num (658157) Leak size: 4 Allocated at: misc.h and line: 202. Type:
"new"
Memory: <01A698E8> Content:
0000: 28 63 a6 01 |(c..|
Alloc num (658163) Leak size: 4 Allocated at: misc.h and line: 202. Type:
"new"
Memory: <01A695D0> Content:
0000: 50 3c 3c 01 |P<<.|
Alloc num (658165) Leak size: 20 Allocated at: integer.cpp and line: 2922.
Type: "new"
Memory: <01A43798> Content:
0000: 48 0d 43 01 cd cd cd cd 02 00 00 00 d8 c2 9f 01
|H.C.............|
0010: 00 00 00 00 |....|
FWIW, the first two leaks are in NewObject and the last one is in
NewInteger (as I said, doesn't seem particularly helpful on its own).
Is this a known issue? Is there something else I need to call to clean up
the memory?
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