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Comments (5)

remingtonc avatar remingtonc commented on August 16, 2024

Interesting - is this happening in ClientBuilder.construct? grpc.ssl_channel_credentials expects None to any of those args, uncertain the conditions which cause this.

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miott avatar miott commented on August 16, 2024

Yes, construct, but, really the crash happens initializing the "grpc._channel.Channel" class.

Here are the 3 parameters (certificate chain is None).

(Pdb) pp channel_creds._credentials._channel_credentials._certificate_chain
None
(Pdb) pp channel_creds._credentials._channel_credentials._pem_root_certificates
(b'-----BEGIN CERTIFICATE-----\nMIICnjCCAYYCCQDnpKTY6UDltDANBgkqhkiG9w0BAQsF'
 b'ADARMQ8wDQYDVQQDDAZy\nb290Q0EwHhcNMjAwMjEwMTU0MzQwWhcNNDcwNjI3MTU0MzQwWjA'
 b'RMQ8wDQYDVQQD\nDAZyb290Q0EwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDGgC'
 b'aEVfyd\nQMcBxXbtAEOSEJXchEfM5GAL1b8aTVLKInZkHuenbNgFWJNElYaXsdpSgnkMft9P\n'
 b'IaGyEeaXvq78ZC7MXy1OKT58xG0LwBYsNeztEBxpge5djsEItb98TVEbrhPceuyi\nDLuse7O'
 b'mfe5vSPtTSzbgmB+7hRzJjgcsWt/LTp0r3m3jf8/tQ+OEJlF7TyN7Teo1\nGTsgoLcaIXAhs4'
 b'EV4B50PjvMxpkO7CDnNSCoD5K9VTme72wcXPv0BykK3LSUVWta\nWSxp6tCdxHvabocdiBfTN'
 b'PkWctRc37uBSa2D/7AgUBfE48opk0922O74YHm8PMw2\n5yjBOdhonFvpAgMBAAEwDQYJKoZI'
 b'hvcNAQELBQADggEBAJ0pgvK21GTq0RkgYe/c\n/db4YDM1StsNW/q+67eCMliZrNJfGjlacs8'
 b'uaY6+PwPCxY+CehJY0T2NpNlQuAhr\n+Fy6WUR+8FEFOSihPqN11EQPgyKsFt1F6FET1mTgBm'
 b'w2+3dnHSlJ3wAnW4IrH8Jw\nTqi3+KRzrDOqj3uX3CZZqFcwdweTiF2yu7TurNDSXky4RTIuo'
 b'pLehkN7oTo0TeWD\n5anQLPaNG6ifLwt1lISbLFaeKISnD5hha/ifvprmp0hOmKBT61L3TpYz'
 b'5nJ8jQwx\nLuteBmVTq6SaiQvcE2kzCFB2KBciCAstt2bF3u5V0DDEOQv1iQla2ULYF7EzKz5'
 b'F\nalU=\n-----END CERTIFICATE-----\n')
(Pdb) pp channel_creds._credentials._channel_credentials._private_key
(b'-----BEGIN RSA PRIVATE KEY-----\nMIIEpQIBAAKCAQEA34Qlyxw+reu4//nIYa6+dDUM'
 b'A1wyyANb5FEAPXdiGN+nraQm\n8Y/mo2R4LiRDp6i2MIR+Kzfptctc1SKJ3QFUrje8VjuqRzW'
 b'gcERBU7Ujfjonpwmj\nlshYkST304cEPX4S/ys4eFT2aunBZvR+CJxhxBQNO7ROx3QvKFYHhL'
 b'YU8AQDW5XN\nIpCKVFQbtuZK4KdoL8MKaJ8bJ5SMnCGHmrXAhv1/xJb5c4QYwLG0hpzpM+WU8'
 b'Rm9\no2mi5w0Y0w/ziOd4tu58OOpF9PVp6CyqPFdQHZcPe1lQty6FdG4y0cn162BuCRfI\nHu6'
 b'Ab6gtcV3GwP38uJHyRU/6lxce3JYpZaOtXwIDAQABAoIBAQChQcPKf7ww2ioE\nc39ACkRZrp'
 b'PWMMRqTRIU7OORdPoPG/zrZ8y45qrtIuUZ1QwCf9PBuTUVlSdGA0wc\ncOipy/X+IzP7utwkt'
 b'+niVTwUWlEbFnXZKzkc5boQLW2m7HgArV6jPdll51ZI2BCy\naJ4tNDXMsvLBKlrTx1zmavrN'
 b'olgEuGcANJBoUHwdCil3s8Z6X/MDcJIC8knkkxYn\nQCb7PY9tKUQF4ks8OJHmOLxcvNSwUZB'
 b'H3iXUicbmotne4MSTaiJc4LqsS13EzrD8\nAODW8xVsjd6OhV0HKQpJIvXiZhGSkZv/pdtWcA'
 b'7X9CdNN4IuPsniSdqKFdFgf5OY\n2YFde9DBAoGBAPnG5kPVetqyMn2e/YDkJBLCv3D2auIlv'
 b'UaX0eajUhxwHpUi69Sv\nfK/UVHv/WD+iUk+O8J5KOIa15x6X0TwbTwalVRGCXA+KUShU4EzG'
 b'ZFmpEodNEviP\nlMQo7mzDhyw9oGMzNxJH9xkm0e2D1lbaK2j4SNkgH5SW92jNq0IEuTIvAoG'
 b'BAOUV\nwTHNB/mFDg7q8/EInfx+VNE0ll51c/tRq1MRgUZ+UuraSjBOaMUBfMW3EfoCKMoq\n2'
 b'HjrU5dw/tF+2wftYWef3DBPBcr+1whleONNwOkjS72TH1TIvcYtfHcj17bdq92Q\nnljXeogK'
 b'hgN0CcCWU/fKh+Zevcp9FM5jT2G0VVvRAoGBAJ1Q/eSJh5hIle5y/d15\nU5MRX7xJJ6aJ+H2'
 b'Gz6hBA01v/IMX/Ir3gEPKKu/yMmXZ2ZfMQpafzpxh41BsdFc0\nKADajwq5HTyYdGc/lgolBj'
 b'1GdKoNDD7LR/qIgSq1t+RQaD0ym6QC+Ym43o2G9K+9\nN4wknNVMGzfeIbO7nfq1uOL3AoGAA'
 b'aZeddVcMVfb+g+HIj1FpgPi6H7Qdm2yICU+\nbqK5o6BVSIu57Q8jgge4tlPTNVG+qXYViQlo'
 b'2LZfn3KicTQsd2qXU2G+UO/07IKO\nlFSDByrR6NOebiXj+AFr3A/OBesiyb245jrnDwPEY1H'
 b'6oAB1KluzDt2v0D2GYNYm\nRDXgR4ECgYEA1/3DArVA8N5hXZSNqwQw7P5gVgdpy/hbtvA61a'
 b'oqcBALXKdbWHB0\nv0qZkZlWabYzKLna0IKuOch0ONauLVqm2aG4fx0ZRdJsAdNkChcQcNTT7'
 b'9bg2DMj\ni1xPX8YSzZ4M1TglrUl28Xz+Sfghk1Zdp4tc3QXzxQ8SO8aWaJ2tDpw=\n-----EN'
 b'D RSA PRIVATE KEY-----\n')
(Pdb)

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miott avatar miott commented on August 16, 2024

Further testing, if either the private key or the client certificate are None, they both have to be None or you get a crash.

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remingtonc avatar remingtonc commented on August 16, 2024

I'm inclined to say that makes sense, but I don't FULLY understand certificates enough to know situations wherein the client key/cert paired wouldn't be necessary. We can add an exception for that condition - in general I usually have a rootCA.pem for CA, client.key for client key, and client.crt for client certificate, and sometimes only the CA. Do you have a use case otherwise?

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miott avatar miott commented on August 16, 2024

NXOS at first only provided the rootCA.pem and host override name. That also connects successfully for XE. From my limited investigation of TLS, I think that works because the actual root authority is the Cisco device itself. If it was a 3rd party, not so sure that would end in a successful connection.

from cisco-gnmi-python.

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