Jeff,
Thank you so much for your reply.
My C# codes passed parameters with the key buffKey = "r8Mkzz23Uq v~}3t"
, int iKeyLength = 16, char* pBuff =
"7A9867EFC505A424BB9787390F501140845A78ACF11970F41DEF08695DB137B4490D64A1C32DE3BE2B67DDFC7C94FF25490D64A1C32DE3BE2B67DDFC7C94FF25490D64A1C32DE3BE2B67DDFC7C94FF25490D64A1C32DE3BE2B67DDFC7C94FF25490D64A1C32DE3BE2B67DDFC7C94FF25490D64A1C32DE3BE2B67DDFC7C94FF25",int
iSrcLength = 256; to unmanged C function DecryptTwofishProcess below,
I shouldl get byte* pOut out ,
My codes below,
void UnManagedCrypto::DecryptTwofishProcess(const byte *buffKey,int
iKeyLength,char* pBuff,int iSrcLength, byte* pOut)
{
int i, iLength = 17;
int iBlockLength = 16;
byte *pSrc;
char *pStr;
int iTemp;
CryptoPP::TwofishDecryption Encr(buffKey, iKeyLength); // crashed inside.
pStr = new char[iSrcLength];
memset((void*)pStr, 0, iSrcLength);
>From the line above CryptoPP::TwofishDecryption Encr(buffKey, iKeyLength),
call
BlockCipherFinal(const byte *key, size_t length)
{this->SetKey(key, length);}
then call void Twofish::Base::UncheckedSetKey(const byte *userKey, unsigned
int keylength, const NameValuePairs &)
{
AssertValidKeyLength(keylength);
unsigned int len = (keylength <= 16 ? 2 : (keylength <= 24 ? 3 : 4));
SecBlock<word32> key(len*2);
GetUserKey(LITTLE_ENDIAN_ORDER, key.begin(), len*2, userKey, keylength);
unsigned int i;
for (i=0; i<40; i+=2)
{
word32 a = h(i, key, len);
word32 b = rotlFixed(h(i+1, key+1, len), 8);
m_k[i] = a+b; //------------------Crashed here.
That crashed on the line above
The same codes work for 32 bit, even I used the same codes to build 64 bit
on 32-bit OS with crypto++561,
we have deployed that 64 bit application, it works on 64 bit machine too.
Thanks for any help.
kevin
On Wednesday, August 30, 2017 at 10:27:09 AM UTC-4, Kevin C wrote:
>
> Hello Everyone,
>
> Could someone do me a favor to help it out?
>
> With my 64bit Window7 machine,
> I can build Crypto++ static library in X86 in visual studio 2017, and use
> it without any issue,
>
> so I built Crypto++ static library in X64 within visual studio 2017, and
> tried to use it with 64bit application,
> It always crashed on the line m_k[i] = a+b with error message :
> System.AccessViolationException: 'Attempted to read or write protected
> memory. This is often an indication that other memory is corrupt.'
>
> Below is the section of codes when crashed, the Crypto++ is the latest
> source.2016.
>
> void Twofish::Base::UncheckedSetKey(const byte *userKey, unsigned int
> keylength, const NameValuePairs &)
> {
> AssertValidKeyLength(keylength);
>
> unsigned int len = (keylength <= 16 ? 2 : (keylength <= 24 ? 3 : 4));
> SecBlock<word32> key(len*2);
> GetUserKey(LITTLE_ENDIAN_ORDER, key.begin(), len*2, userKey, keylength);
>
> unsigned int i;
> for (i=0; i<40; i+=2)
> {
> word32 a = h(i, key, len);
> word32 b = rotlFixed(h(i+1, key+1, len), 8);
> m_k[i] = a+b;
> m_k[i+1] = rotlFixed(a+2*b, 9);
> }
> .............................................................
>
> Did I miss any setting?
>
> Thanks so much for any help.
>
> Kevin
>
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