chore(deps): bump github.com/lestrrat-go/jwx/v2 from 2.0.15 to 2.0.16 in /backend

[dependabot]

Bumps github.com/lestrrat-go/jwx/v2 from 2.0.15 to 2.0.16.

Release notes

Sourced from github.com/lestrrat-go/jwx/v2's releases.

v2.0.16

v2.0.16 31 Oct 2023
[Security]
  * [jws] ECDSA signature verification requires us to check if the signature
    is of the desired length of bytes, but this check that used to exist before
    had been removed in [#65](https://github.com/lestrrat-go/jwx/issues/65), resulting in certain malformed signatures to pass
    verification.
One of the ways this could happen if R is a 31 byte integer and S is 32 byte integer,
both containing the correct signature values, but R is not zero-padded.
Correct = R: [ 0 , ... ] (32 bytes) S: [ ... ] (32 bytes)

Wrong   = R: [ ... ] (31 bytes)     S: [ ... ] (32 bytes)
In order for this check to pass, you would still need to have all 63 bytes

populated with the correct signature. The only modification a bad actor

may be able to do is to add one more byte at the end, in which case the

first 32 bytes (including what would have been S's first byte) is used for R,

and S would contain the rest. But this will only result in the verification to

fail. Therefore this in itself should not pose any security risk, albeit

allowing some illegally formated messages to be verified.



[jwk] jwk.Key objects now have a Validate() method to validate the data
stored in the keys. However, this still does not necessarily mean that the key's
are valid for use in cryptographic operations. If Validate() is successful,
it only means that the keys are in the right format, including the presence
of required fields and that certain fields have proper length, etc.

[New Features]


[jws] Added jws.WithValidateKey() to force calling key.Validate() before
signing or verification.


[jws] jws.Sign() now returns a special type of error that can hold the
individual errors from the signers. The stringification is still the same
as before to preserve backwards compatibility.


[jwk] Added jwk.IsKeyValidationError that checks if an error is an error
from key.Validate().


[Bug Fixes]

[jwt] jwt.ParseInsecure() was running verification if you provided a key
via jwt.WithKey() or jwt.WithKeySet() (#1007)

Changelog

Sourced from github.com/lestrrat-go/jwx/v2's changelog.

v2.0.16 31 Oct 2023 [Security]

• [jws] ECDSA signature verification requires us to check if the signature is of the desired length of bytes, but this check that used to exist before had been removed in #65, resulting in certain malformed signatures to pass verification.

  One of the ways this could happen if R is a 31 byte integer and S is 32 byte integer, both containing the correct signature values, but R is not zero-padded.

  Correct = R: [ 0 , ... ] (32 bytes) S: [ ... ] (32 bytes) Wrong = R: [ ... ] (31 bytes) S: [ ... ] (32 bytes)

  In order for this check to pass, you would still need to have all 63 bytes populated with the correct signature. The only modification a bad actor may be able to do is to add one more byte at the end, in which case the first 32 bytes (including what would have been S's first byte) is used for R, and S would contain the rest. But this will only result in the verification to fail. Therefore this in itself should not pose any security risk, albeit allowing some illegally formated messages to be verified.

• [jwk] jwk.Key objects now have a Validate() method to validate the data stored in the keys. However, this still does not necessarily mean that the key's are valid for use in cryptographic operations. If Validate() is successful, it only means that the keys are in the right format, including the presence of required fields and that certain fields have proper length, etc.

[New Features]

• [jws] Added jws.WithValidateKey() to force calling key.Validate() before signing or verification.

• [jws] jws.Sign() now returns a special type of error that can hold the individual errors from the signers. The stringification is still the same as before to preserve backwards compatibility.

• [jwk] Added jwk.IsKeyValidationError that checks if an error is an error from key.Validate().

[Bug Fixes]

• [jwt] jwt.ParseInsecure() was running verification if you provided a key via jwt.WithKey() or jwt.WithKeySet() (#1007)

Commits

• 3e23a27 Merge branch 'develop/v2' into v2
• 1f04380 Update Changes
• 16acb8b Fix ParseInsecure to parse the token even when a key is given (#1008)
• 2ee2c13 Slightly tweak docs (#1010)
• d93668b fix typo (#1009)
• 1e3b478 Add (jwk.Key).Validate (#1005)
• 1ecc78f [jws] check signature length (#1004)
• bd67589 Update Changes
• ce4ece3 tweak message
• fcfec2c jws: Check key types for those that implement crypto.Signer (#997)
• See full diff in compare view

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