**Question:**

This is my code:

rsa.put_EncodingMode("hex");

rsa.put_Utf8(true);

rsa.put_Charset("utf-8");

rsa.ImportPrivateKey(privateKey.c_str());

const char *decryptStr =

rsa.decryptStringENC(inputString.c_str(), true); if (decryptStr != NULL) {

_lastErrorCode = ErrorCode::SUCCESS ; _lastErrorText = ""; return decryptStr; } _lastErrorCode =

ErrorCode::INVALID_INPUT ;

_lastErrorText = string(rsa.lastErrorText()); return

"";

And this is Log when error happening.

ChilkatLog: DecryptStringENC:

DllDate: Mar 11 2016 ChilkatVersion:
9.5.0.56 UnlockPrefix: XXXXXX
Architecture: Little Endian; 32-bit
Language: Android C/C++

VerboseLogging: 0
usePrivateKey: 1

rsaDecryptBytes: rsa_decrypt:

Pkcs1_5_decode: Invalid PKCS v1.5 PS
length ps_len: 126

--Pkcs1_5_decode
Packet:

7DB736ED6599DB674C40C8FAF1146E7FC1A52E49773094102E955D3C8D44
B521EF16523DC24333D77C8EC6D4F3316EEB78506623F9DA7746B152062B8211FFB859739EB98CBD0FB15B6AB27
BCF16FC5325F01EA03902EB597158F1FBE83B178EDBCA9B269196C25D7DE590EC4F513D45695FEB3DE464BA7201D1AC1785DF78BF
--rsa_decrypt

--rsaDecryptBytes decrypt: Elapsed time: 34 millisec
Failed.

--DecryptStringENC

--ChilkatLog

Try setting the rsa.OaepPadding property = true. Maybe OAEP paddding (not PKCSv1.5) was used in the RSA encryption.

Otherwise, using the wrong private key will result in decryption that results in garbage (not the expected format for PCKSv1.5 or OAEP padding from which the original data is unpacked).

I checked privatekey is correct but still meet error. Data get from server in case meet error have short length is meet error above.

I have setted

```
rsa.put_OaepPadding(true);
```

But sometimes the above error still appears. I logged the private key everytime decrypt and they are same. So do you have another solution? Thank you.