crypto++

问题 I am trying to implement the AES 256 algorithm using Crypto++ in MS visual studio. Operating system is Windows 7 (64 bit). I need to provide the key as a hexadecimal string, password as string and finally i want the encrypted string to also be hexadecimal string. Here is what I am trying to do: My encrypt method: std::string encrypt(const std::string &password) { std::string plain = password; std::string ciphertext; char * decodedKey=

问题 I want to convert myVar from CryptoPP:Integer to char* or to String : The code is below : CryptoPP::Integer myVar = pubKey.ApplyFunction(m); std::cout << "result: " << std::hex << myVar<< std::endl; I have been searching the Internet for converting CryptoPP:Integer to char* but I have had no luck finding. So, either it is really a problem with all to convert CryptoPP:Integer to char* , either I didn't understand very well type CryptoPP:Integer within C++ . Can someone help me please? 回答1: One

问题 I downloaded Crypto++ 5.62 and built it with default project settings. In my project I set up the path to cryptopp.lib and defined its name in "Additional Dependencies". Both Crypto++ and my project - VS 2008. During building of my project I get: main.obj : error LNK2001: unresolved external symbol "class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const CryptoPP::DEFAULT_CHANNEL" (?DEFAULT_CHANNEL@CryptoPP@@3V?$basic_string@DU?$char_traits@D@std@@V?

问题 I built the cryptopp lib to using for an ios application. but isn't working , only told me "Undefined symbols for architecture x86_64: "CryptoPP::ProxyFilter::IsolatedFlush(bool, bool)", referenced from: " and on and on... and I follow the Crypopp wiki page's guideline, but it still crashing. how can I fix that? ld: warning: ignoring file [path]/libcryptopp.a, missing required architecture x86_64 in file [path]/libcryptopp.a (4 slices)CryptoPP::ProxyFilter::IsolatedFlush(bool, bool)",

问题 I have my AES 256 encryption method implemented and working fine in Java as follows! private static final byte[] IV = { 0, 2, 4, 8, 16, 32, 64, 127, 127, 64, 32, 16, 8, 4, 2, 0 }; //actual encryption over here private static byte[] encrypt(byte[] raw, byte[] clear) throws Exception { SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); Cipher cipher = null; if(isIVUsedForCrypto) { cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, skeySpec, new

问题 I have my AES 256 encryption method implemented and working fine in Java as follows! private static final byte[] IV = { 0, 2, 4, 8, 16, 32, 64, 127, 127, 64, 32, 16, 8, 4, 2, 0 }; //actual encryption over here private static byte[] encrypt(byte[] raw, byte[] clear) throws Exception { SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); Cipher cipher = null; if(isIVUsedForCrypto) { cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, skeySpec, new

问题 I am using the library Crypto++ 5.6.5 and Visual Studio 2017. How can I calculate the encryption time for AES-CCM? 回答1: I would like to know how to calculate the encryption time for AES-CCM. The Crypto++ wiki provides an article Benchmarks. It provides a lot of details regarding library performance, how throughput is calculated, and it even references the source code where the actual throughput is measured. Believe it or not, a simple call to clock works just fine to measure bulk encryption.

问题 I'm having a problem trying to convert SecByteBlock to string. Here's my case: I want to encrypt user access data using AES with static key and dynamic iv. My code is something like this: AesKeyIvFactory aesKeyIvFactory; SecByteBlock key = aesKeyIvFactory.loadKey(); SecByteBlock iv = aesKeyIvFactory.createIv(); encryptionService->encode(&userAccess, key, iv); std::string token = std::string(iv.begin(), iv.end()) + userAccess; The code above is supposed to: Load key from file; Create iv;

问题 could someone please tell me as to why the decryption starts to mess up. It works fine with short strings but it will mess up as you can see as it goes on. I THINK it has something to do with the string conversions. std::string encrypt(const std::string& str_in, const std::string& key, const std::string& iv) { std::string str_out; CryptoPP::CFB_Mode<CryptoPP::AES>::Encryption encryption((byte*)key.c_str(), key.length(), (byte*)iv.c_str()); CryptoPP::StringSource encryptor(str_in, true, new

问题 I am using Crypto++, CTR mode, to encrypt and decrypt text in C++. Everything seem to worked 99%. Ecrypting success, decrypting is give back the original text too, but I given some extra random garbage redundancy text like 'ð', at the end of the decrypted text. This extra part is random generated each time I run the code. Is there something wrong in my code? Encrypt a string to a string string encryptString(string plain, byte key[], int sizeKey, byte iv[], int sizeIV){ string cipher; try{ CTR