Hoernchen has uploaded this change for review. ( https://gerrit.osmocom.org/c/pysim/+/40469?usp=email ) Change subject: smdpp: verify cert chain ...................................................................... smdpp: verify cert chain Change-Id: I1e4e4b1b032dc6a8b7d15bd80d533a50fe0cff15 --- M osmo-smdpp.py 1 file changed, 20 insertions(+), 7 deletions(-) git pull ssh://gerrit.osmocom.org:29418/pysim refs/changes/69/40469/1 diff --git a/osmo-smdpp.py b/osmo-smdpp.py index b8b6303..290f77c 100755 --- a/osmo-smdpp.py +++ b/osmo-smdpp.py @@ -311,6 +311,20 @@ return cert return None + def validate_certificate_chain_for_verification(self, euicc_ci_pkid_list: List[bytes]) -> bool: + """Validate that SM-DP+ has valid certificate chains for the given CI PKIDs.""" + for ci_pkid in euicc_ci_pkid_list: + ci_cert = self.ci_get_cert_for_pkid(ci_pkid) + if ci_cert: + # Check if our DPauth certificate chains to this CI + try: + cs = CertificateSet(ci_cert) + cs.verify_cert_chain(self.dp_auth.cert) + return True + except VerifyError: + continue + return False + def __init__(self, server_hostname: str, ci_certs_path: str, common_cert_path: str, use_brainpool: bool = False): self.server_hostname = server_hostname self.upp_dir = os.path.realpath(os.path.join(DATA_DIR, 'upp')) @@ -394,6 +408,12 @@ pkid_list = euiccInfo1['euiccCiPKIdListForSigning'] if 'euiccCiPKIdListForSigningV3' in euiccInfo1: pkid_list = pkid_list + euiccInfo1['euiccCiPKIdListForSigningV3'] + + # Validate that SM-DP+ supports certificate chains for verification + verification_pkid_list = euiccInfo1.get('euiccCiPKIdListForVerification', []) + if verification_pkid_list and not self.validate_certificate_chain_for_verification(verification_pkid_list): + raise ApiError('8.8.4', '3.7', 'The SM-DP+ has no CERT.DPauth.SIG which chains to one of the eSIM CA Root CA Certificate with a Public Key supported by the eUICC') + # verify it supports one of the keys indicated by euiccCiPKIdListForSigning ci_cert = None for x in pkid_list: @@ -408,13 +428,6 @@ if not ci_cert: raise ApiError('8.8.2', '3.1', 'None of the proposed Public Key Identifiers is supported by the SM-DP+') - # TODO: Determine the set of CERT.DPauth.SIG that satisfy the following criteria: - # * Part of a certificate chain ending at one of the eSIM CA RootCA Certificate, whose Public Keys is - # supported by the eUICC (indicated by euiccCiPKIdListForVerification). - # * Using a certificate chain that the eUICC and the LPA both support: - #euiccInfo1['euiccCiPKIdListForVerification'] - # raise ApiError('8.8.4', '3.7', 'The SM-DP+ has no CERT.DPauth.SIG which chains to one of the eSIM CA Root CA CErtificate with a Public Key supported by the eUICC') - # Generate a TransactionID which is used to identify the ongoing RSP session. The TransactionID # SHALL be unique within the scope and lifetime of each SM-DP+. transactionId = uuid.uuid4().hex.upper() -- To view, visit https://gerrit.osmocom.org/c/pysim/+/40469?usp=email To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings?usp=email Gerrit-MessageType: newchange Gerrit-Project: pysim Gerrit-Branch: master Gerrit-Change-Id: I1e4e4b1b032dc6a8b7d15bd80d533a50fe0cff15 Gerrit-Change-Number: 40469 Gerrit-PatchSet: 1 Gerrit-Owner: Hoernchen <ewild(a)sysmocom.de>