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get cose public key and fix some printing

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This commit is contained in:
merlokk 2018-11-26 19:42:37 +02:00
commit 065773377d
2 changed files with 45 additions and 8 deletions
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30
client/fido/cose.c
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@ -71,7 +71,7 @@ COSEValueTypeNameDesc_t *GetCOSECurveElm(int id) {
}
const char *GetCOSECurveDescription(int id) {
COSEValueNameDesc_t *elm = GetCOSECurveElm(id);
COSEValueTypeNameDesc_t *elm = GetCOSECurveElm(id);
if (elm)
return elm->Description;
return COSEEmptyStr;
@ -160,6 +160,7 @@ int COSEGetECDSAKey(uint8_t *data, size_t datalen, bool verbose, uint8_t *public
CborParser parser;
CborValue map;
int64_t i64;
size_t len;
if(verbose)
PrintAndLog("----------- CBOR decode ----------------");
@ -191,6 +192,33 @@ int COSEGetECDSAKey(uint8_t *data, size_t datalen, bool verbose, uint8_t *public
// plain key
public_key[0] = 0x04;
// x - coordinate
res = CborMapGetKeyById(&parser, &map, data, datalen, -2);
if(!res) {
res = CborGetBinStringValue(&map, &public_key[1], 32, &len);
cbor_check(res);
if(verbose)
PrintAndLog("x - coordinate [%d]: %s", len, sprint_hex(&public_key[1], 32));
}
// y - coordinate
res = CborMapGetKeyById(&parser, &map, data, datalen, -3);
if(!res) {
res = CborGetBinStringValue(&map, &public_key[33], 32, &len);
cbor_check(res);
if(verbose)
PrintAndLog("y - coordinate [%d]: %s", len, sprint_hex(&public_key[33], 32));
}
// d - private key
uint8_t private_key[128] = {0};
res = CborMapGetKeyById(&parser, &map, data, datalen, -4);
if(!res) {
res = CborGetBinStringValue(&map, private_key, sizeof(private_key), &len);
cbor_check(res);
if(verbose)
PrintAndLog("d - private key [%d]: %s", len, sprint_hex(private_key, len));
}
if(verbose)
PrintAndLog("----------- CBOR decode ----------------");