X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/0de8e3874d6524379550a50a4d9c29faf2d239ea..2285d9dd944007444ceb042663fc20f6b0ac0d05:/client/mifarehost.c?ds=inline diff --git a/client/mifarehost.c b/client/mifarehost.c index d3f4a4cd..dc3b988a 100644 --- a/client/mifarehost.c +++ b/client/mifarehost.c @@ -630,3 +630,29 @@ int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) { return 0; } + +int tryDecryptWord(uint32_t nt, uint32_t ar_enc, uint32_t at_enc, uint8_t *data, int len){ + /* + uint32_t nt; // tag challenge + uint32_t nr_enc; // encrypted reader challenge + uint32_t ar_enc; // encrypted reader response + uint32_t at_enc; // encrypted tag response + */ + + struct Crypto1State *pcs = NULL; + + ks2 = ar_enc ^ prng_successor(nt, 64); + ks3 = at_enc ^ prng_successor(nt, 96); + + PrintAndLog("Decrypting data with:"); + PrintAndLog(" nt: %08x",nt); + PrintAndLog(" ar_enc: %08x",ar_enc); + PrintAndLog(" at_enc: %08x",at_enc); + PrintAndLog("\nEncrypted data: [%s]", sprint_hex(data,len) ); + + pcs = lfsr_recovery64(ks2, ks3); + mf_crypto1_decrypt(pcs, data, len, FALSE); + PrintAndLog("Decrypted data: [%s]", sprint_hex(data,len) ); + crypto1_destroy(pcs); + return 0; +}