Hello,
I'm experiencing strange behaviour using AES 256Bit encryption in my
VS2005SP1 Professional projects. I'm running a Core 2 Quad Q6600 with
Windows Vista Business 64Bit. My crypto++ calling code looks like
this:
CFB_Mode<AES>::Encryption aes(keyBuffer, keyBufferLength, IV);
(using CBC_Mode leads to the same result). Everything works fine in
x64 Debug version, but in x64 Release version a segmentation fault
occurs in x64dll.asm on line 93. The problem seems to be, that
mov rdi, QWORD PTR [?g_cachelines...@cryptopp@@3IA]
in line 69 fills "rdi" with 0x4079dbf000000040 instead of
0x0000000000000040. Also note, that the seg fault occurs upon
instantiation of the AES encryption object (see stack trace).
I saw that g_cacheLineSize is a word32 - could this be the problem? Am
I missing a preprocessor definition?
Inserting the line
printf("c: %x %x %x\n", *(((unsigned int *) &g_cacheLineSize) - 1),
(unsigned int) g_cacheLineSize, *(((unsigned int *) &g_cacheLineSize)
+ 1));
in rijndael.cpp:974 revealed, that 0x4079dbf0 is right next to
g_cacheLineSize == 0x00000040 in memory, the output on the command
line was
"c: 0 40 4079dbe0".
What am I doing wrong?
Kind regards,
Andrew Bromba
Stack trace:
> iddedit.exe!CryptoPP::Rijndael::Enc::AdvancedProcessBlocks(const
> unsigned char * inBlocks=0x0000000000a2f260, const unsigned char *
> xorBlocks=0x0000000000000000, unsigned char * outBlocks=0x0000000000a2f2b0,
> unsigned __int64 length=0x0000000000000010, unsigned int flags=0x00000000)
> Line 977 C++
iddedit.exe!CryptoPP::Rijndael::Enc::ProcessAndXorBlock(const
unsigned char * inBlock=0x0000000000a2f260, const unsigned char *
xorBlock=0x0000000000000000, unsigned char *
outBlock=0x0000000000a2f2b0) Line 289 C++
iddedit.exe!CryptoPP::CFB_ModePolicy::TransformRegister() Line 52
C+
+
iddedit.exe!CryptoPP::CFB_ModePolicy::CipherResynchronize(const
unsigned char * iv=0x000000000012f660, unsigned __int64
length=0x0000000000000010) Line 61 C++
iddedit.exe!
CryptoPP::CFB_CipherTemplate<CryptoPP::AbstractPolicyHolder<CryptoPP::CFB_CipherAbstractPolicy,CryptoPP::CFB_ModePolicy>
>::UncheckedSetKey(const unsigned char * key=0x0000000000a2b870,
unsigned int length=0x00000020, const CryptoPP::NameValuePairs &
params={...}) Line 165 C++
iddedit.exe!CryptoPP::SimpleKeyingInterface::SetKey(const unsigned
char * key=0x0000000000a2b870, unsigned __int64
length=0x0000000000000020, const CryptoPP::NameValuePairs & params=
{...}) Line 57 C++
iddedit.exe!
CryptoPP::CipherModeFinalTemplate_CipherHolder<CryptoPP::BlockCipherFinal<0,CryptoPP::Rijndael::Enc>,CryptoPP::ConcretePolicyHolder<CryptoPP::Empty,CryptoPP::CFB_EncryptionTemplate<CryptoPP::AbstractPolicyHolder<CryptoPP::CFB_CipherAbstractPolicy,CryptoPP::CFB_ModePolicy>
>,CryptoPP::CFB_CipherAbstractPolicy>
>::CipherModeFinalTemplate_CipherHolder<CryptoPP::BlockCipherFinal<0,CryptoPP::Rijndael::Enc>,CryptoPP::ConcretePolicyHolder<CryptoPP::Empty,CryptoPP::CFB_EncryptionTemplate<CryptoPP::AbstractPolicyHolder<CryptoPP::CFB_CipherAbstractPolicy,CryptoPP::CFB_ModePolicy>
>,CryptoPP::CFB_CipherAbstractPolicy> >(const unsigned char *
key=0x0000000000a2b870, unsigned __int64 length=0x0000000000000020,
const unsigned char * iv=0x000000000012f660) Line 264 + 0xae bytes C+
+
...
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