Thanks a lot, now it works perfectly Le mardi 17 mars 2015 17:44:18 UTC-4, JF Jobidon a écrit : > > Hi > I use c++ with crypto++ to generate a sha256 hash from this string: > "800C28FCA386C7A227600B2FE50B7CAE11EC86D3BF1FBE471BE89827E19D72AA1D" > I have the same result as > http://www.xorbin.com/tools/sha256-hash-calculator : > > E2E4146A36E9C455CF95A4F259F162C353CD419CC3FD0E69AE36D7D1B6CD2C09 > > but the problem is I try to obtain a private key for the Bitcoin protocol: > > when I use the *Bitcoin* Explorer (*bx*) command line tool. > > I have a different result: > > > bx sha256 > 800C28FCA386C7A227600B2FE50B7CAE11EC86D3BF1FBE471BE89827E19D72AA1D > 8147786c4d15106333bf278d71dadaf1079ef2d2440a4dde37d747ded5403592 > > So I don't end up with the same private key (WIF) > > Question: are there different implementations of sha256? > > Thanks > JF > > > Here is my code using crypto++ > > #include <cryptopp/hex.h> > #include <cryptopp/sha.h> > #include <cryptopp/base64.h> > #include <iostream> > #include <string> > > using namespace std; > > string makeSHA256 (const string); > > int main() > { > string myString = > "800C28FCA386C7A227600B2FE50B7CAE11EC86D3BF1FBE471BE89827E19D72AA1D"; > > cout << makeSHA256(myString) << endl; // > E2E4146A36E9C455CF95A4F259F162C353CD419CC3FD0E69AE36D7D1B6CD2C09 > > return 0; > } > > > string makeSHA256 (const string myString) { > > string output; > > CryptoPP::SHA256 hash; > byte digest[CryptoPP::SHA256::DIGESTSIZE]; > > hash.CalculateDigest(digest,(const byte > *)myString.c_str(),myString.size()); > //hash.CalculateDigest( digest, reinterpret_cast<byte*>(&myString[0]), > myString.length() ); > > CryptoPP::HexEncoder encoder; > CryptoPP::StringSink *SS = new CryptoPP::StringSink(output); > encoder.Attach(SS); > encoder.Put(digest,sizeof(digest)); > encoder.MessageEnd(); > > return output; > } > > > >
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