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add mac sketch

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merlokk 2021-07-06 12:05:59 +03:00
commit 0a51eb445d
1 changed files with 12 additions and 1 deletions
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13
client/src/mifare/desfiresecurechan.c
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@ -22,7 +22,6 @@
#include "commonutil.h"
#include "mifare/desfire_crypto.h"
void DesfireCryptoEncDec(DesfireContext *ctx, uint8_t *srcdata, size_t srcdatalen, uint8_t *dstdata, bool encode) {
uint8_t data[1024] = {0};
@ -93,13 +92,25 @@ static void DesfireSecureChannelEncodeD40(DesfireContext *ctx, uint8_t cmd, uint
}
static void DesfireSecureChannelEncodeEV1(DesfireContext *ctx, uint8_t cmd, uint8_t *srcdata, size_t srcdatalen, uint8_t *dstdata, size_t *dstdatalen) {
uint8_t data[1024] = {0};
size_t rlen = 0;
memcpy(dstdata, srcdata, srcdatalen);
*dstdatalen = srcdatalen;
switch(ctx->commMode) {
case DCMPlain:
case DCMMACed:
data[0] = cmd;
rlen = padded_data_length(srcdatalen + 1, desfire_get_key_block_length(ctx->keyType));
memcpy(&data[1], srcdata, srcdatalen);
DesfireCryptoEncDec(ctx, data, rlen, NULL, true);
memcpy(dstdata, srcdata, srcdatalen);
if (srcdatalen != 0 && ctx->commMode == DCMMACed) {
memcpy(&dstdata[srcdatalen], ctx->IV, 4);
*dstdatalen = rlen;
}
break;
case DCMEncrypted:
break;