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https://gitlab.com/fabinfra/fabaccess/borepin.git
synced 2025-04-20 02:16:30 +02:00
Added: ChangeKey AES Same Key
This commit is contained in:
TheJoKlLa
parent
7381341d37
commit
307bd60925
@ -299,7 +299,7 @@ namespace NFC.Mifare_DESFire
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/// Generates SessionKey for DES Authentification
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/// </summary>
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/// <returns>16Byte SessionKey</returns>
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private byte[] GenerateSesionKey_DES(byte[] rndA, byte[] rndB)
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public byte[] GenerateSesionKey_DES(byte[] rndA, byte[] rndB)
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{
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byte[] sesssionkey = new byte[8];
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@ -319,6 +319,37 @@ namespace NFC.Mifare_DESFire
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return Concatenate(sesssionkey, sesssionkey);
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}
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/// <summary>
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/// Generates SessionKey for AES Authentification
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/// </summary>
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/// <returns>16Byte SessionKey</returns>
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public byte[] GenerateSesionKey_AES(byte[] rndA, byte[] rndB)
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{
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byte[] sesssionkey = new byte[16];
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for (int i = 0; i < sesssionkey.Length; i++)
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{
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if (i < 4)
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{
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sesssionkey[i] = rndA[i];
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}
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else if(i >= 4 && i < 8)
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{
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sesssionkey[i] = rndB[i - 4];
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}
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else if (i >= 8 && i < 12)
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{
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sesssionkey[i] = rndA[i + 4];
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}
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else
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{
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sesssionkey[i] = rndB[i];
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}
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}
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return sesssionkey;
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}
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/// <summary>
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/// Set KeyVersion in DES Key
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/// KeyVersion is stored in LSB of the first 8 Bytes of the DES Key
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@ -347,6 +378,30 @@ namespace NFC.Mifare_DESFire
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return new_key;
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}
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/// <summary>
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/// Expand Array to Block Size, fill with 0x00
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/// </summary>
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/// <param name="data"></param>
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public byte[] ExpandToBlockSize(byte[] data, uint bocksize)
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{
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int diff = data.Length % (int)bocksize;
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if (diff == 0)
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{
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return data;
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}
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byte[] expand = new byte[data.Length + bocksize - diff];
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data.CopyTo(expand, 0);
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for (int i = expand.Length - 1; i > data.Length - 1; i--)
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{
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expand[i] = 0x00;
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}
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return expand;
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}
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#endregion
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#region DESFire Commands
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@ -530,6 +585,147 @@ namespace NFC.Mifare_DESFire
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_Log.Debug("End SelectApplication");
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}
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/// <summary>
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/// Authenticate to PICC, with ISO Authenticate
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/// </summary>
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/// <param name="key_id">0x01 - 0x0D</param>
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/// <param name="key"></param>
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/// <param name="rndA">!!! WARNING For Testing only !!!</param>
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/// <exception cref="AuthenticationDelayException">Retry after short Time</exception>
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public void AuthenticateISO_AES(byte key_id, byte[] key, byte[] rndA = null)
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{
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_Log.Debug("Start AuthenticateISO_AES");
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// Sepearte InitialisationVector for Authentication
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byte[] iv = new byte[16];
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APDUCommand cmd_challange_request = new APDUCommand(IsoCase.Case4Short)
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{
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CLA = 0x90,
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INS = 0xAA,
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Data = new byte[]
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{
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key_id
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}
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};
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_Log.DebugFormat("APDU_CMD(cmd_challange_request): {0}", ConvertToHexString(cmd_challange_request.ToArray()));
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APDUResponse response = _Card.Transmit(cmd_challange_request);
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_Log.DebugFormat("APDU_RES(cmd_challange_request): {0}", ConvertToHexString(response.ToArray()));
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CheckAPDUResponse(response);
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byte[] rndB_enc = response.Body;
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_Log.DebugFormat("rndB_enc: {0}", ConvertToHexString(rndB_enc));
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AES aes = new AES();
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byte[] rndB = aes.Decrypt(rndB_enc, key, GenerateEmptyKey(16));
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_Log.DebugFormat("rndB: {0}", ConvertToHexString(rndB));
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rndB.CopyTo(iv, 0);
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byte[] rndB_rl = RotateLeft(rndB);
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_Log.DebugFormat("rndB_enc: {0}", ConvertToHexString(rndB_rl));
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if (rndA == null)
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{
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Random rnd = new Random();
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rndA = new byte[16];
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rnd.NextBytes(rndA);
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}
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_Log.DebugFormat("rndA: {0}", ConvertToHexString(rndA));
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byte[] rndAB = Concatenate(rndA, rndB_rl);
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_Log.DebugFormat("rndAB: {0}", ConvertToHexString(rndAB));
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byte[] rndAB_enc = aes.Encrypt(rndAB, key, rndB_enc);
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_Log.DebugFormat("rndA_rndB_enc: {0}", ConvertToHexString(rndAB_enc));
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iv = ExtractLastBlock(rndAB_enc, 16);
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APDUCommand cmd_challange_response = new APDUCommand(IsoCase.Case4Short)
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{
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CLA = 0x90,
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INS = 0xAF,
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Data = rndAB_enc
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};
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_Log.DebugFormat("APDU_CMD(cmd_challange_response): {0}", ConvertToHexString(cmd_challange_response.ToArray()));
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response = _Card.Transmit(cmd_challange_response);
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_Log.DebugFormat("APDU_RES(cmd_challange_response): {0}", ConvertToHexString(cmd_challange_response.ToArray()));
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CheckAPDUResponse(response);
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byte[] encryptedRndAFromCard = response.Body;
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_Log.DebugFormat("encryptedRndAFromCard: {0}", ConvertToHexString(encryptedRndAFromCard));
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byte[] rotatedRndAFromCard = aes.Decrypt(encryptedRndAFromCard, key, iv);
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_Log.DebugFormat("rotatedRndAFromCard: {0}", ConvertToHexString(rotatedRndAFromCard));
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byte[] rndAFromCard = RotateRight(rotatedRndAFromCard);
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_Log.DebugFormat("rndAFromCard: {0}", ConvertToHexString(rndAFromCard));
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if (!rndA.SequenceEqual(rndAFromCard))
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{
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throw new Exception("Authentication failed, PICC Challenge is not corret");
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}
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_SessionKey = GenerateSesionKey_AES(rndA, rndB);
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_Log.DebugFormat("_SessionKey: {0}", ConvertToHexString(_SessionKey));
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_IV = GenerateEmptyKey(16);
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_Log.DebugFormat("_IV: {0}", ConvertToHexString(_IV));
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_Log.Debug("End AuthenticateISO_DES");
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}
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public void ChangeKey_AES(byte key_id, byte[] new_key, byte key_version)
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{
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_Log.Debug("Start ChangeKey_AES");
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byte[] header = new byte[]
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{
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0xC4, key_id
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};
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_Log.DebugFormat("header: {0}", ConvertToHexString(header));
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// AES Key Version is Append to Key
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byte[] key_and_version = Concatenate(new_key, new byte[] { key_version });
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byte[] command = Concatenate(header, key_and_version);
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_Log.DebugFormat("command: {0}", ConvertToHexString(command));
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CRC32 crc32 = new CRC32();
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byte[] crc = crc32.Calculate(command);
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_Log.DebugFormat("crc: {0}", ConvertToHexString(crc));
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byte[] cryptogram = Concatenate(key_and_version, crc);
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_Log.DebugFormat("cryptogram: {0}", ConvertToHexString(cryptogram));
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byte[] cryptogram_block = ExpandToBlockSize(cryptogram, 16);
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_Log.DebugFormat("cryptogram_block: {0}", ConvertToHexString(cryptogram_block));
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AES aes = new AES();
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byte[] cryptogram_enc = aes.Encrypt(cryptogram_block, _SessionKey, _IV);
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_Log.DebugFormat("cryptogram_enc: {0}", ConvertToHexString(cryptogram_enc));
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byte[] data = Concatenate(new byte[] { key_id }, cryptogram_enc);
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_Log.DebugFormat("data: {0}", ConvertToHexString(data));
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APDUCommand cmd_ChangeKey = new APDUCommand(IsoCase.Case4Short)
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{
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CLA = 0x90,
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INS = 0xC4,
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Data = data
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};
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_Log.DebugFormat("APDU_CMD(cmd_ChangeKey): {0}", ConvertToHexString(cmd_ChangeKey.ToArray()));
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APDUResponse response = _Card.Transmit(cmd_ChangeKey);
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_Log.DebugFormat("APDU_RES(cmd_ChangeKey): {0}", ConvertToHexString(response.ToArray()));
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CheckAPDUResponse(response);
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_Log.Debug("End ChangeKey_AES");
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}
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#endregion
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#region Configuration Generator
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@ -3,8 +3,11 @@ using NFC.ISO7816_4;
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using NFC.Mifare_DESFire;
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using NFC.NXP_MIFARE_DESFire.Exceptions;
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using NSubstitute;
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using NSubstitute.Core;
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using NUnit.Framework;
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using PCSC.Iso7816;
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using System;
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using System.Collections.Generic;
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using System.Net;
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namespace NFC_Test
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@ -508,6 +511,24 @@ namespace NFC_Test
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byte[] lastblock = desfire.XOR(null, null);
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});
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}
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[Test]
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public void GenerateSessionKey_AES()
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{
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MIFARE_DESFire_V2 desfire = new MIFARE_DESFire_V2(null);
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byte[] rndA = desfire.ConvertFromHexString("bc14dfde20074617e45a8822f06fdd91");
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Console.WriteLine(desfire.ConvertToHexString(rndA));
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byte[] rndB = desfire.ConvertFromHexString("482ddc54426e6dee560413b8d95471f5");
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Console.WriteLine(desfire.ConvertToHexString(rndB));
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byte[] expected_sessionkey = desfire.ConvertFromHexString("bc14dfde482ddc54f06fdd91d95471f5");
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Console.WriteLine(desfire.ConvertToHexString(expected_sessionkey));
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byte[] sessionkey = desfire.GenerateSesionKey_AES(rndA, rndB);
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Console.WriteLine(desfire.ConvertToHexString(sessionkey));
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Assert.AreEqual(expected_sessionkey, sessionkey);
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}
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#endregion
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#region DESFire Commands
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@ -546,6 +567,68 @@ namespace NFC_Test
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Assert.AreEqual(expected_sessionkey, desfire._SessionKey);
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Assert.AreEqual(expected_iv, desfire._IV);
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}
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[Test]
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public void AuthenticateISO_AES()
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{
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ICard card = Substitute.For<ICard>();
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MIFARE_DESFire_V2 desfire = new MIFARE_DESFire_V2(card);
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APDUResponse response_challenge_request = new APDUResponse()
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{
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SW1 = 0x91,
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SW2 = 0xAF,
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Body = desfire.ConvertFromHexString("43a28e28c653df83cd85039714bccb51")
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};
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APDUResponse response_challenge_response = new APDUResponse()
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{
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SW1 = 0x91,
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SW2 = 0x00,
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Body = desfire.ConvertFromHexString("d8f70a0f9a43f522f775a56f5688592f")
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};
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byte[] rndA = desfire.ConvertFromHexString("8a8b3c15e576ae3a21c2b18e6aead1f1");
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byte[] key = desfire.ConvertFromHexString("00000000000000000000000000000000");
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card.Transmit(Arg.Is<APDUCommand>(x => x.INS == 0xAA)).Returns(response_challenge_request);
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card.Transmit(Arg.Is<APDUCommand>(x => x.INS == 0xAF)).Returns(response_challenge_response);
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desfire.AuthenticateISO_AES(0x00, key, rndA);
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byte[] expected_sessionkey = desfire.ConvertFromHexString("8a8b3c15c71d0cf46aead1f148f27703");
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byte[] expected_iv = desfire.GenerateEmptyKey(16);
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Assert.AreEqual(expected_sessionkey, desfire._SessionKey);
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Assert.AreEqual(expected_iv, desfire._IV);
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}
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[Test]
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public void ChangeKey_AES()
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{
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ICard card = Substitute.For<ICard>();
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MIFARE_DESFire_V2 desfire = new MIFARE_DESFire_V2(card);
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APDUResponse response = new APDUResponse()
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{
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SW1 = 0x91,
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SW2 = 0x00
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};
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byte[] new_key = desfire.ConvertFromHexString("45eeb8338ae8f49a032e85bb11143530");
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byte[] sessionkey = desfire.ConvertFromHexString("2f96515262e1beb0129de2df3e97feb3");
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byte[] iv = desfire.ConvertFromHexString("00000000000000000000000000000000");
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desfire._SessionKey = sessionkey;
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desfire._IV = iv;
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card.Transmit(null).ReturnsForAnyArgs(response);
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desfire.ChangeKey_AES(0x00, new_key, 0x10);
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}
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#endregion
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}
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}
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@ -39,9 +39,49 @@ namespace NFC_Test
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byte keySetting1 = desfire.GenerateKeySetting1(ChangeApplicationKey.MASTERKEY, ChangeMasterKeySettings.WITHMASTERKEY, CreateDeleteFile.NOKEY, FileDirectoryAccess.NOKEY, ChangeMasterKey.CHANGEABLE);
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byte keySetting2 = desfire.GenerateKeySetting2(CryptoOperationsType.AES, FileIdentifies.NOTUSED, 0x03);
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desfire.CreateApplication(0xAAFFEE, keySetting1, keySetting2);
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desfire.CreateApplication(0xC0FFEE, keySetting1, keySetting2);
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desfire.SelectApplication(0xAAFFEE);
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desfire.SelectApplication(0xC0FFEE);
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desfire.AuthenticateISO_AES(0x00, desfire.GenerateEmptyKey(16));
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byte[] new_key = desfire.ConvertFromHexString("45eeb8338ae8f49a032e85bb11143530");
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desfire.ChangeKey_AES(0x00, new_key, 0x10);
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transmit_successfully = true;
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card.Disconnect();
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};
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reader.CardDiscovered += handler;
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reader.Start();
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Assert.AreEqual(true, transmit_successfully);
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reader.Stop();
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reader.CardDiscovered -= handler;
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}
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[Test]
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public void ChangeKey()
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{
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IHardware hardware = new Hardware();
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IReader reader = hardware.OpenReader(_ReaderID);
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bool transmit_successfully = false;
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ReaderEventHandler handler = (sender, card) =>
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{
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card.Connect();
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MIFARE_DESFire_V2 desfire = new MIFARE_DESFire_V2(card);
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desfire.SelectApplication(0xC0FFEE);
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desfire.AuthenticateISO_AES(0x00, desfire.GenerateEmptyKey(16));
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byte[] new_key = desfire.ConvertFromHexString("45eeb8338ae8f49a032e85bb11143530");
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desfire.ChangeKey_AES(0x00, new_key, 0x10);
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transmit_successfully = true;
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