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| # Specification version number | ||
|
|
||
| 2022-10-01-001 | ||
|
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||
| * _status_: experimental | ||
|
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||
| # Specification name | ||
|
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||
| ECH Check (`echcheck`) | ||
|
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||
| # Test preconditions | ||
|
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| * An internet connection | ||
|
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||
| # Expected impact | ||
|
|
||
| Understanding whether there is blocking triggered by the presence of the | ||
| Encrypted Client Hello (ECH) extension in the Client Hello during a TLS | ||
| handshake. | ||
|
|
||
| # Expected inputs | ||
|
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||
| - `input` (`string`; optional): a target URL that is unlikely to be blocked | ||
| to connect to (e.g. `google.com`) | ||
|
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||
| The default implementation will use the domain `example.org` as | ||
| the `input`. | ||
|
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||
| # Test description | ||
|
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||
| Before performing the test, this experiment will resolve the given target URL | ||
| and establish a TCP connection. It will then attempt two TLS handshakes - one | ||
| with an ECH extension, and another control handshake without an ECH extension | ||
| present. | ||
|
|
||
| This experiment does not actually encrypt the Client Hello, but instead | ||
| attempts a GREASE’d (Generate Random Extensions And Sustain Extensibility) ECH | ||
| connection as per [draft-ietf-tls-esni-14](https://datatracker.ietf.org/doc/draft-ietf-tls-esni/). | ||
| This entails placing mocked ECH extension with random values in the | ||
| Client Hello. As passive network observers cannot tell a GREASE’d ECH connection | ||
| apart from a regular one, this test helps detect if there is any interference | ||
| to TLS handshakes that possess this field. | ||
|
|
||
| # Expected output | ||
|
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||
| ## Parent data format | ||
|
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| We will include data following these data formats: | ||
|
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||
| * `df-006-tlshandshake` | ||
|
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||
| ## Semantics | ||
|
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||
| ```JSON | ||
| { | ||
| "test_keys": { | ||
| "control": {}, | ||
| "target": {} | ||
| } | ||
| } | ||
| ``` | ||
|
|
||
| - `control` : follows the `df-006-tlshandshake` data format | ||
|
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||
| - `target` : follows the `df-006-tlshandshake` data format | ||
|
|
||
| ## Possible conclusions | ||
|
|
||
| * Failure of the target TLS handshake with the corresponding control handshake | ||
| succeeding will indicate interference to TLS handshakes with the ECH extension | ||
| present | ||
|
|
||
| ## Example output sample | ||
|
|
||
| ```JSON | ||
| { | ||
| "annotations": { | ||
| "architecture": "amd64", | ||
| "engine_name": "ooniprobe-engine", | ||
| "engine_version": "3.17.0-alpha", | ||
| "platform": "macos" | ||
| }, | ||
| "data_format_version": "0.2.0", | ||
| "input": "https://example.org", | ||
| "measurement_start_time": "2022-10-02 14:51:22", | ||
| "probe_asn": "AS45609", | ||
| "probe_cc": "IN", | ||
| "probe_ip": "127.0.0.1", | ||
| "probe_network_name": "Bharti Airtel Limited", | ||
| "report_id": "20221002T145122Z_echcheck_IN_45609_n1_joXsfBSYhFLCSNW9", | ||
| "resolver_asn": "AS9498", | ||
| "resolver_ip": "59.144.144.6", | ||
| "resolver_network_name": "Bharti Airtel Limited", | ||
| "software_name": "miniooni", | ||
| "software_version": "3.17.0-alpha", | ||
| "test_keys": { | ||
| "control": { | ||
| "address": "93.184.216.34:443", | ||
| "cipher_suite": "TLS_AES_256_GCM_SHA384", | ||
| "failure": null, | ||
| "negotiated_protocol": "h2", | ||
| "network": "tcp", | ||
| "no_tls_verify": true, | ||
| "peer_certificates": [ | ||
| { | ||
| "data": "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", | ||
| "format": "base64" | ||
| }, | ||
| { | ||
| "data": "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", | ||
| "format": "base64" | ||
| } | ||
| ], | ||
| "server_name": "example.org", | ||
| "t": 1.155229, | ||
| "t0": 0.746678, | ||
| "tags": [], | ||
| "tls_version": "TLSv1.3" | ||
| }, | ||
| "target": { | ||
| "address": "93.184.216.34:443", | ||
| "cipher_suite": "TLS_AES_256_GCM_SHA384", | ||
| "failure": null, | ||
| "negotiated_protocol": "h2", | ||
| "network": "tcp", | ||
| "no_tls_verify": true, | ||
| "peer_certificates": [ | ||
| { | ||
| "data": "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", | ||
| "format": "base64" | ||
| }, | ||
| { | ||
| "data": "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", | ||
| "format": "base64" | ||
| } | ||
| ], | ||
| "server_name": "example.org", | ||
| "t": 1.462465, | ||
| "t0": 1.159156, | ||
| "tags": [], | ||
| "tls_version": "TLSv1.3" | ||
| } | ||
| }, | ||
| "test_name": "echcheck", | ||
| "test_runtime": 1.4624715, | ||
| "test_start_time": "2022-10-02 14:51:21", | ||
| "test_version": "0.1.0" | ||
| } | ||
| ``` | ||
|
|
||
| # Privacy considerations | ||
|
|
||
| This nettest may be less intrusive than other nettests as it encourages | ||
| connections to URLs that are unlikely to be censored. We are not issuing DNS | ||
| queries for the sensitive domain and we are not connecting to the sensitive | ||
| IP address. | ||
|
|
||
| # Packet capture considerations | ||
|
|
||
| This test does not capture packets by default. | ||
|
|
||
| # Acknowledgments | ||
|
|
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| Cloudflare's ECH [implementation](https://github.com/cloudflare/go) was used as | ||
| a reference for this experiment. | ||
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| # Future work | ||
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| This nettest is still experimental. It will establish a full ECH connection | ||
| once the protocol is stable and a Go implementation is available. |