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ndef cert right decode.

Browse source 
https://github.com/skjolber/ndef-tools-for-android/blob/master/ndeftools/src/org/ndeftools/wellknown/SignatureRecord.java
https://github.com/nfcpy/ndeflib/blob/master/src/ndef/signature.py
This commit is contained in:
merlokk 2019-03-05 19:41:50 +02:00
parent 04a6a63427
commit 53e0d03098
2 changed files with 80 additions and 26 deletions
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91
client/mifare/ndef.c
View file

@ -26,6 +26,21 @@ static const char *TypeNameFormat_s[] = {
"n/a"
};
static const char *ndefSigType_s[] = {
"Not present", // No signature present
"RSASSA_PSS_SHA_1", // PKCS_1
"RSASSA_PKCS1_v1_5_WITH_SHA_1", // PKCS_1
"DSA",
"ECDSA",
"n/a"
};
static const char *ndefCertificateFormat_s[] = {
"X_509",
"X9_68",
"n/a"
};
static const char *URI_s[] = {
"", // 0x00
"http://www.", // 0x01
@ -143,36 +158,60 @@ int ndefDecodeSig(uint8_t *sig, size_t siglen) {
}
indx++;
while (indx < siglen) {
if (sig[indx] == 0x04) {
size_t intsiglen = (sig[indx + 1] << 8) + sig[indx + 2];
indx += 3;
PrintAndLogEx(NORMAL, "\tsignature [%d]: %s", intsiglen, sprint_hex_inrow(&sig[indx], intsiglen));
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));
}
indx += intsiglen;
continue;
}
uint8_t sigType = sig[indx] & 0x7f;
bool sigURI = sig[indx] & 0x80;
if (sig[indx] == 0x80) {
size_t inturilen = (sig[indx + 1] << 8) + sig[indx + 2];
indx += 3;
PrintAndLogEx(NORMAL, "\tsignature uri [%d]: %.*s", inturilen, inturilen, &sig[indx]);
indx += inturilen;
continue;
}
PrintAndLogEx(NORMAL, "\tsignature type: %s", ((sigType < stNA) ? ndefSigType_s[sigType] : ndefSigType_s[stNA]));
PrintAndLogEx(NORMAL, "\tsignature uri: %s", (sigURI ? "present" : "not present"));
size_t intsiglen = (sig[indx + 1] << 8) + sig[indx + 2];
// ecdsa 0x04
if (sigType == stECDSA) {
indx += 3;
PrintAndLogEx(NORMAL, "\tsignature [%d]: %s", intsiglen, sprint_hex_inrow(&sig[indx], intsiglen));
size_t skiplen = (sig[indx + 1] << 8) + sig[indx + 2];
indx += skiplen;
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));
}
}
indx += intsiglen;
if (sigURI) {
size_t intsigurilen = (sig[indx] << 8) + sig[indx + 1];
indx += 2;
PrintAndLogEx(NORMAL, "\tsignature uri [%d]: %.*s", intsigurilen, intsigurilen, &sig[indx]);
indx += intsigurilen;
}
uint8_t certFormat = (sig[indx] >> 4) & 0x07;
uint8_t certCount = sig[indx] & 0x0f;
bool certURI = sig[indx] & 0x80;
PrintAndLogEx(NORMAL, "\tcertificate format: %s", ((certFormat < sfNA) ? ndefCertificateFormat_s[certFormat] : ndefCertificateFormat_s[sfNA]));
PrintAndLogEx(NORMAL, "\tcertificates count: %d", certCount);
// print certificates
indx++;
for (int i = 0; i < certCount; i++) {
size_t intcertlen = (sig[indx + 1] << 8) + sig[indx + 2];
indx += 2;
PrintAndLogEx(NORMAL, "\tcertificate %d [%d]: %s", i + 1, intcertlen, sprint_hex_inrow(&sig[indx], intcertlen));
indx += intcertlen;
}
// have certificate uri
if ((indx <= siglen) && certURI) {
size_t inturilen = (sig[indx] << 8) + sig[indx + 1];
indx += 2;
PrintAndLogEx(NORMAL, "\tcertificate uri [%d]: %.*s", inturilen, inturilen, &sig[indx]);
indx += inturilen;
}
return 0;
};

15
client/mifare/ndef.h
View file

@ -25,6 +25,21 @@ typedef enum {
tnfUnchangedRecord = 0x06
} TypeNameFormat_t;
typedef enum {
stNotPresent = 0x00,
stRSASSA_PSS_SHA_1 = 0x01,
stRSASSA_PKCS1_v1_5_WITH_SHA_1 = 0x02,
stDSA = 0x03,
stECDSA = 0x04,
stNA = 0x05
} ndefSigType_t;
typedef enum {
sfX_509 = 0x00,
sfX9_68 = 0x01,
sfNA = 0x02
} ndefCertificateFormat_t;
typedef struct {
bool MessageBegin;
bool MessageEnd;