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signature decode r and s works

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merlokk 2020-03-31 18:30:44 +03:00
commit 5b9c51fb7e
1 changed files with 6 additions and 9 deletions
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15
client/mifare/ndef.c
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@ -244,15 +244,12 @@ static int ndefDecodeSig2(uint8_t *sig, size_t siglen) {
} else { } else {
PrintAndLogEx(NORMAL, "\tsignature [%zu]: %s", intsiglen, sprint_hex_inrow(&sig[indx], intsiglen)); PrintAndLogEx(NORMAL, "\tsignature [%zu]: %s", intsiglen, sprint_hex_inrow(&sig[indx], intsiglen));
if (sigType == stECDSA_P192 || sigType == stECDSA_P256) { if (sigType == stECDSA_P192 || sigType == stECDSA_P256) {
PrintAndLogEx(NORMAL, "\tsignature: ECDSA"); int slen = intsiglen / 2;
uint8_t rval[300] = {0}; if (slen == 24 || slen == 32) {
uint8_t sval[300] = {0}; PrintAndLogEx(NORMAL, "\tsignature: ECDSA-%d", slen * 8);
int res = ecdsa_asn1_get_signature(&sig[indx], intsiglen, rval, sval); PrintAndLogEx(NORMAL, "\t\tr: %s", sprint_hex(&sig[indx], slen));
if (!res) { indx += slen;
PrintAndLogEx(NORMAL, "\t\tr: %s", sprint_hex(rval, 32)); PrintAndLogEx(NORMAL, "\t\ts: %s", sprint_hex(&sig[indx], slen));
PrintAndLogEx(NORMAL, "\t\ts: %s", sprint_hex(sval, 32));
} else {
PrintAndLogEx(NORMAL, "\t\error signature decode");
} }
} else { } else {
PrintAndLogEx(NORMAL, "\tsignature: unknown type"); PrintAndLogEx(NORMAL, "\tsignature: unknown type");