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(MFC) Manually Duplicate SetSecretKeyViaPasswordDemonstrates how to duplicate the password string to binary secret key computation of SetSecretKeyViaPassword.
#include <CkCrypt2.h> #include <CkStringBuilder.h> void ChilkatSample(void) { CkString strOut; // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. CkCrypt2 crypt; // The password string is transformed to a binary secret key by computing the // MD5 digest (of the utf-8 password) to obtain 16 bytes. // If the KeyLength is greater than 16 bytes, then the MD5 digest of the Base64 encoding // of the utf-8 password is added. A max of 32 bytes of key material is generated, and // this is truncated to the actual KeyLength required. crypt.put_CryptAlgorithm("aes"); crypt.put_KeyLength(256); const char *password = "this is my password"; crypt.SetSecretKeyViaPassword(password); // Examine the resulting SecretKey in hex: strOut.append("Computed Secret Key = "); strOut.append(crypt.getEncodedKey("hex")); strOut.append("\r\n"); // Now perform the same computation manually: CkStringBuilder sb; crypt.put_HashAlgorithm("md5"); crypt.put_Charset("utf-8"); crypt.put_EncodingMode("hex"); sb.Append(crypt.hashStringENC(password)); const char *passwordBase64 = crypt.encodeString(password,"utf-8","base64"); sb.Append(crypt.hashStringENC(passwordBase64)); strOut.append("Manually Computed = "); strOut.append(sb.getAsString()); strOut.append("\r\n"); // The output is: // Computed Secret Key = 210D53992DFF432EC1B1A9698AF9DA16C7E90518F90E24828F78EC9E0A413B36 // Manually Computed = 210D53992DFF432EC1B1A9698AF9DA16C7E90518F90E24828F78EC9E0A413B36 SetDlgItemText(IDC_EDIT1,strOut.getUnicode()); } |
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