Base64 strings should not be checked for typos

[jplatte]

I just got lots of errors for a base64-encoded TLS certificate. Typos should probably detect base64 strings and not check them, or just skip .pem files entirely :)

error: `UE` should be `USE`, `DUE`
  --> ./examples/self_signed_certs/cert.pem:3:14
  |
3 | BQAwWTELMAkGA1UEBhMCVVMxEzARBgNVBAgMClNvbWUtU3RhdGUxITAfBgNVBAoM
  |               ^^
  |
error: `UE` should be `USE`, `DUE`
  --> ./examples/self_signed_certs/cert.pem:4:42
  |
4 | GEludGVybmV0IFdpZGdpdHMgUHR5IEx0ZDESMBAGA1UEAwwJbG9jYWxob3N0MB4X
  |                                           ^^
  |
error: `UE` should be `USE`, `DUE`
  --> ./examples/self_signed_certs/cert.pem:5:50
  |
5 | DTIxMDczMTE0MjIxMloXDTIyMDczMTE0MjIxMlowWTELMAkGA1UEBhMCVVMxEzAR
  |                                                   ^^
  |
error: `UE` should be `USE`, `DUE`
  --> ./examples/self_signed_certs/cert.pem:7:14
  |
7 | IEx0ZDESMBAGA1UEAwwJbG9jYWxob3N0MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8A
  |               ^^
  |
error: `Fo` should be `Of`, `For`
  --> ./examples/self_signed_certs/cert.pem:14:36
   |
14 | NfS4LAYuKeWwHbzooER0yZ0wHwYDVR0jBBgwFoAUzFnKNfS4LAYuKeWwHbzooER0
   |                                     ^^
   |

[epage]

We have base64 detection; to understand why its not working in your case, I'd need to see the entire file.

You can work around this with per-file settings though if we have a known extension, I think its worth baking it directly into typos

[jplatte]

This is the file: https://github.com/tokio-rs/axum/blob/7cf8dafdce26276b1969111dbbf034bb98786e30/examples/self_signed_certs/cert.pem

I used --exclude '*.pem' to exclude this file (and also the corresponding key.pem).

[jplatte]

I guess base64 detection might not trigger on these lines because they happen to only contain alphanumeric characters?

[epage]

For our base64 detection to work, it needs to be 90+ characters and have the appropriate padding. The line splitting is what I think is messing up the detection.

I'm working on making all cert files excluded by default

[epage]

Binaries for v1.1.5 should be building right now which should exclude cert file content by default.

I've added a cert file type (see typos --type-list). You can see this definition in the config and what it causes to happen by running typos --dump-config -