26009 Key Generation Failed Encrypt Aes

 
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Encrypt, decrypt and generate a key in C# using AES256.

AES-256 with random key generation instead of hash. Ask Question Asked 2 years, 8 months ago. The salting and hashing is for converting a human generated password into an AES key. Encrypt a file with AES using a secret key derived with Argon2. Generating an AES key. An AES key is a random bitstring of the right length. For a 128-bit AES key you need 16 bytes. For a 256-bit AES key you need 32 bytes. If you need to generate your own AES key for encrypting data, you should use a good random source. The strength of the key depends on the unpredictability of the random. How can you 'quickly and easily' encrypt a file using AES-128? A site like www.ShellScrypt.com uses openssl AES-128 quite intensely to encrypt shell scripts and then makes the encrypted copies of the scripts executable. All you have to do is paste the script to the site, and a zip file will be generated for you. May 01, 2019 RSA public/private key generation, RSA, AES encryption/decryption, RSA sign/verify in Swift with CommonCrypto in iOS and OS X - soyersoyer/SwCrypt.

encryption.cs

26009 Key Generation Failed Encrypt Aesthetics

#regionEncryption
/// <summary>
/// Generate a private key
/// From : www.chapleau.info/blog/2011/01/06/usingsimplestringkeywithaes256encryptioninc.html
/// </summary>
privatestaticstringGenerateKey(intiKeySize)
{
RijndaelManagedaesEncryption=newRijndaelManaged();
aesEncryption.KeySize=iKeySize;
aesEncryption.BlockSize=128;
aesEncryption.Mode=CipherMode.CBC;
aesEncryption.Padding=PaddingMode.PKCS7;
aesEncryption.GenerateIV();
stringivStr=Convert.ToBase64String(aesEncryption.IV);
aesEncryption.GenerateKey();
stringkeyStr=Convert.ToBase64String(aesEncryption.Key);
stringcompleteKey=ivStr+','+keyStr;
returnConvert.ToBase64String(ASCIIEncoding.UTF8.GetBytes(completeKey));
}
/// <summary>
/// Encrypt
/// From : www.chapleau.info/blog/2011/01/06/usingsimplestringkeywithaes256encryptioninc.html
/// </summary>
privatestaticstringEncrypt(stringiPlainStr, stringiCompleteEncodedKey, intiKeySize)
{
RijndaelManagedaesEncryption=newRijndaelManaged();
aesEncryption.KeySize=iKeySize;
aesEncryption.BlockSize=128;
aesEncryption.Mode=CipherMode.CBC;
aesEncryption.Padding=PaddingMode.PKCS7;
aesEncryption.IV=Convert.FromBase64String(ASCIIEncoding.UTF8.GetString(Convert.FromBase64String(iCompleteEncodedKey)).Split(',')[0]);
aesEncryption.Key=Convert.FromBase64String(ASCIIEncoding.UTF8.GetString(Convert.FromBase64String(iCompleteEncodedKey)).Split(',')[1]);
byte[] plainText=ASCIIEncoding.UTF8.GetBytes(iPlainStr);
ICryptoTransformcrypto=aesEncryption.CreateEncryptor();
byte[] cipherText=crypto.TransformFinalBlock(plainText, 0, plainText.Length);
returnConvert.ToBase64String(cipherText);
}
/// <summary>
/// Decrypt
/// From : www.chapleau.info/blog/2011/01/06/usingsimplestringkeywithaes256encryptioninc.html
/// </summary>
privatestaticstringDecrypt(stringiEncryptedText, stringiCompleteEncodedKey, intiKeySize)
{
RijndaelManagedaesEncryption=newRijndaelManaged();
aesEncryption.KeySize=iKeySize;
aesEncryption.BlockSize=128;
aesEncryption.Mode=CipherMode.CBC;
aesEncryption.Padding=PaddingMode.PKCS7;
aesEncryption.IV=Convert.FromBase64String(ASCIIEncoding.UTF8.GetString(Convert.FromBase64String(iCompleteEncodedKey)).Split(',')[0]);
aesEncryption.Key=Convert.FromBase64String(ASCIIEncoding.UTF8.GetString(Convert.FromBase64String(iCompleteEncodedKey)).Split(',')[1]);
ICryptoTransformdecrypto=aesEncryption.CreateDecryptor();
byte[] encryptedBytes=Convert.FromBase64CharArray(iEncryptedText.ToCharArray(), 0, iEncryptedText.Length);
returnASCIIEncoding.UTF8.GetString(decrypto.TransformFinalBlock(encryptedBytes, 0, encryptedBytes.Length));
}
#endregion
26009 key generation failed encrypt aesop

commented Jun 6, 2014

hi fairly new to the cryptography..
when im implementing the above code im getting a error while decrypting.
'Padding is invalid and cannot be removed.'

please suggest a resolution
thanks and regards

26009 Key Generation Failed Encrypt Aesthetically

commented Oct 9, 2017•
edited

26009 Key Generation Failed Encrypt Aes File

How-to save -safely- the private key ? Windows registry ? in disk ?

I use ASP.NET applications.

Test your code Download gdb mac os x.

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26009 Key Generation Failed Encrypt Aes Drive


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
sebbo wrote:
> hi!
>
> how can i encrypt binary data using crypto++ and aes? i would like
> to encrypt picture and audio data but all my tries have failed. can
> you help me?
Wei has some really good MFC examples on CodeProject. There is an
example for file encryption using Crypto++ with MFC.
http://www.codeproject.com/KB/cpp/cryptest__mfc_style_.aspx
Alternatively, you can check the wiki. There is an example at the
bottom of the page:
http://www.cryptopp.com/wiki/AES#Encrypting_and_Decrypting_Using_AES
AutoSeededRandomPool rnd;
int keyLength = AES::DEFAULT_KEYLENGTH; // 16 bytes = 128 bit key
int defBlockSize = AES::BLOCKSIZE;
// Generate a random key
byte key[AES::DEFAULT_KEYLENGTH];
rnd.GenerateBlock(key, AES::DEFAULT_KEYLENGTH);
// Generate a random IV
byte iv[AES::BLOCKSIZE];
rnd.GenerateBlock(iv, AES::BLOCKSIZE);
char plainText[] = 'Hello! How are you.';
int messageLen = (int)strlen(plainText) + 1;
//////////////////////////////////////////////////////////////////////////
// Encrypt
CFB_Mode<AES>::Encryption cfbEncryption(key, AES::DEFAULT_KEYLENGTH, iv);
cfbEncryption.ProcessData((byte*)plainText, (byte*)plainText, messageLen);
//////////////////////////////////////////////////////////////////////////
// Decrypt
CFB_Mode<AES>::Decryption cfbDecryption(key, AES::DEFAULT_KEYLENGTH, iv);
cfbDecryption.ProcessData((byte*)plainText, (byte*)plainText, messageLen);
Regards,
Dillon Beresford
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