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Implement Originality Signature Check in 'hf mfu info'

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* add support for elliptic curve 'secp128r1' to mbedtls library
* change ecdsa_signature_verify() to allow different curves, signature lengths, and skipping hash
* add another public key for Mifare Ultralight EV1
This commit is contained in:
pwpiwi 2019-08-01 10:53:26 -04:00 • committed by GitHub
commit 3a5ffba7c1
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
13 changed files with 278 additions and 165 deletions
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6
client/fido/fidocore.c
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@ -279,7 +279,7 @@ int FIDOCheckDERAndGetKey(uint8_t *der, size_t derLen, bool verbose, uint8_t *pu
}
// get public key
res = ecdsa_public_key_from_pk(&cert.pk, publicKey, publicKeyMaxLen);
res = ecdsa_public_key_from_pk(&cert.pk, MBEDTLS_ECP_DP_SECP256R1, publicKey, publicKeyMaxLen);
if (res) {
PrintAndLog("ERROR: getting public key from certificate 0x%x - %s", (res<0)?-res:res, ecdsa_get_error(res));
} else {
@ -396,9 +396,9 @@ int FIDO2CheckSignature(json_t *root, uint8_t *publickey, uint8_t *sign, size_t
clientDataHash, 32, // Hash of the serialized client data. "$.ClientDataHash" from json
NULL, 0);
//PrintAndLog("--xbuf(%d)[%d]: %s", res, xbuflen, sprint_hex(xbuf, xbuflen));
res = ecdsa_signature_verify(publickey, xbuf, xbuflen, sign, signLen);
res = ecdsa_signature_verify(MBEDTLS_ECP_DP_SECP256R1, publickey, xbuf, xbuflen, sign, signLen, true);
if (res) {
if (res == -0x4e00) {
if (res == MBEDTLS_ERR_ECP_VERIFY_FAILED) {
PrintAndLog("Signature is NOT VALID.");
} else {
PrintAndLog("Other signature check error: %x %s", (res<0)?-res:res, ecdsa_get_error(res));