EXTAPI void secure_aes_cbc_init(void)
{
// To arrive at a 128-bit session key for AES encryption, Bob and Alice should
// both transform the raw shared secret using a hash algorithm that produces
// the size of session key desired. MD5 produces a 16-byte (128-bit) result, so
// this is a good choice for 128-bit AES.
// Here's how you would use Chilkat Crypt (a separate Chilkat component) to
// produce the session key:
crypt = CkCrypt2_Create();
success = CkCrypt2_UnlockComponent(crypt, "Anything for 30-day trial.");
if (success != TRUE) {
ALOGD("%s",CkCrypt2_lastErrorText(crypt));
CkDh_Dispose(dhAlice);
CkCrypt2_Dispose(crypt);
return;
}
CkCrypt2_putEncodingMode(crypt, "hex");
CkCrypt2_putHashAlgorithm(crypt, "md5");
sessionKey = CkCrypt2_hashStringENC(crypt, kAlice);
ALOGD("128-bit Session Key:");
ALOGD("%s", sessionKey);
// Encrypt something...
CkCrypt2_putCryptAlgorithm(crypt, "aes");
CkCrypt2_putKeyLength(crypt, 128);
CkCrypt2_putCipherMode(crypt, "cbc");
// Use an IV that is the MD5 hash of the session key...
iv = CkCrypt2_hashStringENC(crypt, sessionKey);
// AES uses a 16-byte IV:
ALOGD("Initialization Vector:");
ALOGD("%s", iv);
CkCrypt2_SetEncodedKey(crypt,sessionKey, "hex");
CkCrypt2_SetEncodedIV(crypt,iv, "hex");
// Encrypt some text:
CkCrypt2_putEncodingMode(crypt, "base64");
}
int encryptString(char* result, char* password)
{
HCkCrypt2 crypt;
BOOL success;
const char * hexKey;
const char * text = result;
const char * encText;
const char * decryptedText;
crypt = CkCrypt2_Create();
success = CkCrypt2_UnlockComponent(crypt,"Anything for 30-day trial");
if (success != TRUE) {
printf("Crypt component unlock failed\n");
return 0;
}
CkCrypt2_putCryptAlgorithm(crypt,"aes");
CkCrypt2_putCipherMode(crypt,"cbc");
CkCrypt2_putKeyLength(crypt,256);
// Generate a binary secret key from a password string
// of any length. For 128-bit encryption, GenEncodedSecretKey
// generates the MD5 hash of the password and returns it
// in the encoded form requested. The 2nd param can be
// "hex", "base64", "url", "quoted-printable", etc.
hexKey = CkCrypt2_genEncodedSecretKey(crypt,password,"hex");
CkCrypt2_SetEncodedKey(crypt,hexKey,"hex");
CkCrypt2_putEncodingMode(crypt,"base64");
// Encrypt a string and return the binary encrypted data
// in a base-64 encoded string.
encText = CkCrypt2_encryptStringENC(crypt,result);
//printf("%s\n",encText);
char tmpStr[1000];
strcpy(result, encText);
CkCrypt2_Dispose(crypt);
}
