RSA 1024bit on G120

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1

Is there any example how to do 1024 bit RSA encryption with modulus and exponent on G120 (4.2.7.0)?

2

@ Honken - I believe 1024 is default key size for RSA provider.

3

I got the following exception

CryptoException ErrorCode = 6

But I cant find any documentation of the error codes, does any one know what this error code is?

4

“Alles gute” on code 0, funny!!

5

I am running the emulator when I get the error, I asume that the emulator have enough memory…

6

I have added an example on how to use RSACryptoServiceProvider

http://www.tinyclr.com/codeshare/entry/628

Tested it using Microsoft Emulator. Worked without exceptions.

1 Like
7 

            byte[] modulus = { 0xC2, 0x1A, 0x31, 0x2, 0x98, 0xD4, 0x33, 0xC4, 0xB7, 0xF6, 0x87, 0xDD, 0xE4, 0x9A, 0xFC, 0x14, 0xBA, 0xE, 0xA8, 0xE9, 0x8D, 0xAB, 0x57, 0x5C, 0xA7, 0xBB, 0xEE, 0x8B, 0x44, 0x7F, 0x82, 0xE2, 0x70, 0xFA, 0x25, 0xC2, 0x97, 0x54, 0x24, 0x28, 0x7F, 0x3D, 0xEC, 0x7D, 0x6F, 0xD3, 0xF2, 0xE, 0x9A, 0x29, 0x16, 0x4A, 0x40, 0x6C, 0xDD, 0x47, 0xF2, 0xE3, 0x59, 0x13, 0xBD, 0xA7, 0x5F, 0xDF, 0x52, 0x36, 0xD2, 0xBF, 0xC2, 0x76, 0xD2, 0x62, 0x58, 0x9A, 0x42, 0xCA, 0x43, 0xD4, 0xC5, 0xB6, 0x3, 0x19, 0x29, 0x0, 0x24, 0xBE, 0x1F, 0x4D, 0xE3, 0x2F, 0x6B, 0x15, 0x91, 0x91, 0xE7, 0x87, 0x3A, 0xF9, 0x9B, 0xC3, 0xAA, 0x12, 0x3A, 0x37, 0xC7, 0xE9, 0x39, 0xB5, 0xBE, 0xCA, 0x86, 0x58, 0xE9, 0xA1, 0xFE, 0x31, 0x47, 0x4E, 0x75, 0x33, 0x49, 0x5, 0x56, 0xAF, 0xA0, 0xF2, 0x11, 0xD1 };
           
 byte[] exponent = { 0xA1, 0x5E, 0x8F, 0x2, 0x5E, 0xB6, 0x84, 0xB7, 0x76, 0x4D, 0xC2, 0x55, 0xA, 0x9A, 0x83, 0x1A, 0x64, 0x38, 0x8D, 0xDB, 0x65, 0xC9, 0x5E, 0x1F, 0xC, 0xE0, 0x24, 0x8, 0xAA, 0x90, 0xEB, 0xEA, 0x80, 0xC, 0xA7, 0x59, 0xE8, 0xDF, 0xAE, 0x13, 0xF0, 0xFD, 0x35, 0x60, 0x6F, 0x99, 0x20, 0x33, 0x5D, 0x9C, 0xED, 0x8, 0x1C, 0x19, 0xA5, 0xBA, 0xC, 0x47, 0x50, 0xA6, 0x25, 0xD5, 0x41, 0xD0, 0xFF, 0x90, 0x1F, 0xE4, 0x2A, 0x1C, 0x17, 0x13, 0xE3, 0x17, 0xC7, 0xE2, 0x80, 0xF5, 0xD3, 0xF9, 0xEF, 0x37, 0x54, 0xBF, 0x3B, 0x32, 0x8B, 0xF3, 0xCE, 0x6C, 0x25, 0x8A, 0x65, 0xDA, 0x0, 0x91, 0xAC, 0x83, 0x18, 0xA6, 0x36, 0x4C, 0x35, 0x5D, 0x7B, 0x81, 0xD2, 0xBB, 0x33, 0x35, 0x4C, 0x51, 0xB1, 0x26, 0xEC, 0xED, 0xE7, 0x4C, 0x62, 0x73, 0x76, 0x1B, 0x10, 0xFD, 0x41, 0xF2, 0x26, 0x1 };
            
byte[] data = { 0x93, 0x45, 0xA1, 0x67, 0xD0, 0x3A, 0x4, 0x3C, 0xCB, 0x36, 0x3F, 0xD, 0x1F, 0x11, 0xF9, 0xAA, 0xF6, 0xF3, 0x19, 0xA3, 0xBC, 0x54, 0x27, 0x48, 0xE7, 0xFC, 0x6E, 0xA9, 0x5E, 0x3, 0xAC, 0x96, 0xCC, 0xD1, 0xD7, 0x9F, 0x97, 0x1E, 0x55, 0x14, 0xE0, 0xF2, 0xAA, 0x5, 0x67, 0xA5, 0x78, 0x42, 0xDC, 0xDF, 0x57, 0x5B, 0x8C, 0x98, 0xD9, 0xA0, 0x26, 0x18, 0xCD, 0x21, 0x8F, 0xF7, 0x88, 0xAE, 0xBF, 0x1D, 0xD4, 0xD7, 0x98, 0xC2, 0xC0, 0xEC, 0xF7, 0x6E, 0x73, 0xFD, 0xFA, 0xF9, 0xC9, 0xDA, 0xDB, 0x8B, 0x4C, 0x13, 0x87, 0x9C, 0xD6, 0xF8, 0x64, 0xF4, 0xFA, 0x99, 0x9C, 0xAB, 0xE7, 0xC6, 0x6A, 0x29, 0x79, 0xF, 0xF5, 0x26, 0xA7, 0xC4, 0x4E, 0xAA, 0x7C, 0xF5, 0x39, 0xD, 0x4E, 0x72, 0x72, 0xF7, 0xD7, 0xCB };
           
 byte[] signedData = { 0x00, 0x01, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x93, 0x45, 0xA1, 0x67, 0xD0, 0x3A, 0x4, 0x3C, 0xCB, 0x36, 0x3F, 0xD, 0x1F, 0x11, 0xF9, 0xAA, 0xF6, 0xF3, 0x19, 0xA3, 0xBC, 0x54, 0x27, 0x48, 0xE7, 0xFC, 0x6E, 0xA9, 0x5E, 0x3, 0xAC, 0x96, 0xCC, 0xD1, 0xD7, 0x9F, 0x97, 0x1E, 0x55, 0x14, 0xE0, 0xF2, 0xAA, 0x5, 0x67, 0xA5, 0x78, 0x42, 0xDC, 0xDF, 0x57, 0x5B, 0x8C, 0x98, 0xD9, 0xA0, 0x26, 0x18, 0xCD, 0x21, 0x8F, 0xF7, 0x88, 0xAE, 0xBF, 0x1D, 0xD4, 0xD7, 0x98, 0xC2, 0xC0, 0xEC, 0xF7, 0x6E, 0x73, 0xFD, 0xFA, 0xF9, 0xC9, 0xDA, 0xDB, 0x8B, 0x4C, 0x13, 0x87, 0x9C, 0xD6, 0xF8, 0x64, 0xF4, 0xFA, 0x99, 0x9C, 0xAB, 0xE7, 0xC6, 0x6A, 0x29, 0x79, 0xF, 0xF5, 0x26, 0xA7, 0xC4, 0x4E, 0xAA, 0x7C, 0xF5, 0x39, 0xD, 0x4E, 0x72, 0x72, 0xF7, 0xD7, 0xCB };
           
 byte[] compareEncryptedData = { 0x43, 0xC6, 0x24, 0xB3, 0x65, 0x11, 0x4B, 0xAC, 0x17, 0xF2, 0x5, 0x7, 0x2E, 0x71, 0x63, 0xE8, 0xA3, 0x2D, 0xB6, 0x6F, 0xA5, 0x15, 0x9F, 0x5, 0xC5, 0x8A, 0xB4, 0xF9, 0x59, 0x50, 0xE7, 0x4E, 0xE0, 0x24, 0x29, 0x0, 0x9E, 0x85, 0xD9, 0x5D, 0x19, 0xC3, 0x3C, 0xAB, 0xC3, 0xD6, 0xEB, 0x1C, 0xB1, 0x30, 0x82, 0x78, 0x97, 0x2B, 0xAB, 0x3C, 0xF8, 0x5C, 0x9F, 0x20, 0xB0, 0x53, 0x2, 0xFF, 0x4C, 0xBA, 0x1A, 0x70, 0x51, 0xA2, 0x11, 0xAD, 0x38, 0x65, 0x90, 0x5B, 0x40, 0x64, 0x5D, 0xBA, 0x29, 0x5D, 0xB6, 0xCB, 0x84, 0xC1, 0xDA, 0xEA, 0xC2, 0xE1, 0xCA, 0xC, 0x2, 0x2, 0x12, 0xBD, 0x4C, 0x81, 0xF7, 0x6E, 0xD8, 0x54, 0xFA, 0xD, 0x90, 0x80, 0xB7, 0x7B, 0x5D, 0x24, 0xE0, 0x8E, 0x27, 0x32, 0x85, 0x88, 0x6, 0xF4, 0xF4, 0xAC, 0x25, 0x8C, 0x6, 0x1D, 0x2C, 0xA1, 0x7E, 0x6D };

I am trying to encrypt signedData with RSA and compare it with the correct result in compareEncryptedData array.
But I am getting wrong result from RSA.

I have tested running data in BigInteger with Managed code and after ModPow operation I get correct result but it takes years to calculate the result.
So I need a faster way of doing encryption on data array.

8

Yes I know, but for this solution I must go with 1024 bits.

I need to find out how to get RSA running without padding (custom padding) or call BigInteger from RLP.