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d40/encoded channel works

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This commit is contained in:
merlokk 2021-07-28 14:18:53 +03:00
commit b1f819e208
2 changed files with 44 additions and 43 deletions
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19
client/src/cmdhfmfdes.c
View file

@ -6363,13 +6363,14 @@ static int CmdHF14ADesReadData(const char *Cmd) {
break;
}
}
DesfireSetCommMode(&dctx, fsettings.commMode);
if (verbose)
PrintAndLogEx(INFO, "Got file type: %s. Option: %s. comm mode: %s",
GetDesfireFileType(fsettings.fileType),
CLIGetOptionListStr(DesfireReadFileTypeOpts, op),
CLIGetOptionListStr(DesfireCommunicationModeOpts, fsettings.commMode));
DesfireSetCommMode(&dctx, fsettings.commMode);
} else {
PrintAndLogEx(WARNING, "GetFileSettings error. Can't get file type.");
}
@ -6408,6 +6409,7 @@ static int CmdHF14ADesReadData(const char *Cmd) {
}
if (op == RFTRecord) {
resplen = 0;
if (reclen == 0) {
res = DesfireReadRecords(&dctx, fnum, offset, 1, resp, &resplen);
if (res != PM3_SUCCESS) {
@ -6421,11 +6423,14 @@ static int CmdHF14ADesReadData(const char *Cmd) {
if (verbose)
PrintAndLogEx(INFO, "Record length %zu", reclen);
res = DesfireReadRecords(&dctx, fnum, offset, length, resp, &resplen);
if (res != PM3_SUCCESS) {
PrintAndLogEx(ERR, "Desfire ReadRecords command " _RED_("error") ". Result: %d", res);
DropField();
return PM3_ESOFT;
// if we got one record via the DesfireReadRecords before -- we not need to get it 2nd time
if (length != 1 || resplen == 0) {
res = DesfireReadRecords(&dctx, fnum, offset, length, resp, &resplen);
if (res != PM3_SUCCESS) {
PrintAndLogEx(ERR, "Desfire ReadRecords command " _RED_("error") ". Result: %d", res);
DropField();
return PM3_ESOFT;
}
}
if (resplen > 0) {

68
client/src/mifare/desfiresecurechan.c
View file

@ -148,45 +148,38 @@ static void DesfireSecureChannelEncodeD40(DesfireContext *ctx, uint8_t cmd, uint
size_t rlen = 0;
uint8_t hdrlen = DesfireGetCmdHeaderLen(cmd);
switch (ctx->commMode) {
case DCMPlain:
memcpy(dstdata, srcdata, srcdatalen);
*dstdatalen = srcdatalen;
break;
case DCMMACed:
if (srcdatalen == 0)
break;
if (ctx->commMode == DCMMACed || (ctx->commMode == DCMEncrypted && srcdatalen <= hdrlen)) {
if (srcdatalen == 0)
return;
rlen = srcdatalen + DesfireGetMACLength(ctx);
memcpy(data, srcdata, srcdatalen);
DesfireCryptoEncDec(ctx, true, data, srcdatalen, NULL, true);
memcpy(dstdata, srcdata, srcdatalen);
memcpy(&dstdata[srcdatalen], ctx->IV, 4);
*dstdatalen = rlen;
break;
case DCMEncrypted:
if (srcdatalen == 0 || srcdatalen <= hdrlen)
break;
rlen = srcdatalen + DesfireGetMACLength(ctx);
memcpy(data, srcdata, srcdatalen);
DesfireCryptoEncDec(ctx, true, data, srcdatalen, NULL, true);
memcpy(dstdata, srcdata, srcdatalen);
memcpy(&dstdata[srcdatalen], ctx->IV, 4);
*dstdatalen = rlen;
} else if (ctx->commMode == DCMEncrypted) {
if (srcdatalen == 0 || srcdatalen <= hdrlen)
return;
rlen = padded_data_length(srcdatalen + 2, desfire_get_key_block_length(ctx->keyType)); // 2 - crc16
memcpy(data, srcdata, srcdatalen);
compute_crc(CRC_14443_A, data, srcdatalen, &data[srcdatalen], &data[srcdatalen + 1]);
DesfireCryptoEncDec(ctx, true, data, rlen, dstdata, true);
*dstdatalen = rlen;
break;
case DCMEncryptedPlain:
if (srcdatalen == 0 || srcdatalen <= hdrlen)
break;
rlen = padded_data_length(srcdatalen + 2, desfire_get_key_block_length(ctx->keyType)); // 2 - crc16
memcpy(data, srcdata, srcdatalen);
compute_crc(CRC_14443_A, data, srcdatalen, &data[srcdatalen], &data[srcdatalen + 1]);
DesfireCryptoEncDec(ctx, true, data, rlen, dstdata, true);
*dstdatalen = rlen;
} if (ctx->commMode == DCMEncryptedPlain) {
if (srcdatalen == 0 || srcdatalen <= hdrlen)
return;
rlen = padded_data_length(srcdatalen - hdrlen, desfire_get_key_block_length(ctx->keyType)) + hdrlen;
memcpy(data, srcdata, srcdatalen);
memcpy(dstdata, srcdata, hdrlen);
DesfireCryptoEncDec(ctx, true, &data[hdrlen], rlen - hdrlen, &dstdata[hdrlen], true);
*dstdatalen = rlen;
ctx->commMode = DCMEncrypted;
break;
case DCMNone:
;
rlen = padded_data_length(srcdatalen - hdrlen, desfire_get_key_block_length(ctx->keyType)) + hdrlen;
memcpy(data, srcdata, srcdatalen);
memcpy(dstdata, srcdata, hdrlen);
DesfireCryptoEncDec(ctx, true, &data[hdrlen], rlen - hdrlen, &dstdata[hdrlen], true);
*dstdatalen = rlen;
ctx->commMode = DCMEncrypted;
} else {
memcpy(dstdata, srcdata, srcdatalen);
*dstdatalen = srcdatalen;
}
}
@ -261,6 +254,9 @@ static void DesfireSecureChannelDecodeD40(DesfireContext *ctx, uint8_t *srcdata,
switch (ctx->commMode) {
case DCMMACed:
//if (srcdatalen > 4)
// *dstdatalen = srcdatalen - 4;
// TODO check MAC!!!
break;
case DCMEncrypted: