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signature decode r and s works

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merlokk
2020-03-31 18:30:44 +03:00
parent 38004f9db5
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 {
PrintAndLogEx(NORMAL, "\tsignature [%zu]: %s", intsiglen, sprint_hex_inrow(&sig[indx], intsiglen));
if (sigType == stECDSA_P192 || sigType == stECDSA_P256) {
PrintAndLogEx(NORMAL, "\tsignature: ECDSA");
uint8_t rval[300] = {0};
uint8_t sval[300] = {0};
int res = ecdsa_asn1_get_signature(&sig[indx], intsiglen, rval, sval);
if (!res) {
PrintAndLogEx(NORMAL, "\t\tr: %s", sprint_hex(rval, 32));
PrintAndLogEx(NORMAL, "\t\ts: %s", sprint_hex(sval, 32));
} else {
PrintAndLogEx(NORMAL, "\t\error signature decode");
int slen = intsiglen / 2;
if (slen == 24 || slen == 32) {
PrintAndLogEx(NORMAL, "\tsignature: ECDSA-%d", slen * 8);
PrintAndLogEx(NORMAL, "\t\tr: %s", sprint_hex(&sig[indx], slen));
indx += slen;
PrintAndLogEx(NORMAL, "\t\ts: %s", sprint_hex(&sig[indx], slen));
}
} else {
PrintAndLogEx(NORMAL, "\tsignature: unknown type");