Update module github.com/cloudflare/circl to v1.6.3 [SECURITY] (#776)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[github.com/cloudflare/circl](https://redirect.github.com/cloudflare/circl)
| indirect | patch | `v1.6.1` -> `v1.6.3` |

### GitHub Vulnerability Alerts

####
[CVE-2026-1229](https://redirect.github.com/cloudflare/circl/security/advisories/GHSA-q9hv-hpm4-hj6x)

The CombinedMult function in the CIRCL ecc/p384 package (secp384r1
curve) produces an incorrect value for specific inputs. The issue is
fixed by using complete addition formulas.
ECDH and ECDSA signing relying on this curve are not affected.

The bug was fixed in
**[v1.6.3](https://redirect.github.com/cloudflare/circl/releases/tag/v1.6.3)**.

---

### Release Notes

<details>
<summary>cloudflare/circl (github.com/cloudflare/circl)</summary>

###
[`v1.6.3`](https://redirect.github.com/cloudflare/circl/releases/tag/v1.6.3):
CIRCL v1.6.3

[Compare
Source](https://redirect.github.com/cloudflare/circl/compare/v1.6.2...v1.6.3)

##### CIRCL v1.6.3

Fix a bug on ecc/p384 scalar multiplication.

##### What's Changed

- sign/mldsa: Check opts for nil value by
[@&#8203;armfazh](https://redirect.github.com/armfazh) in
[https://github.com/cloudflare/circl/pull/582](https://redirect.github.com/cloudflare/circl/pull/582)
- ecc/p384: Point addition must handle point doubling case. by
[@&#8203;armfazh](https://redirect.github.com/armfazh) in
[https://github.com/cloudflare/circl/pull/583](https://redirect.github.com/cloudflare/circl/pull/583)
- Release CIRCL v1.6.3 by
[@&#8203;armfazh](https://redirect.github.com/armfazh) in
[https://github.com/cloudflare/circl/pull/584](https://redirect.github.com/cloudflare/circl/pull/584)

**Full Changelog**:
https://github.com/cloudflare/circl/compare/v1.6.2...v1.6.3

###
[`v1.6.2`](https://redirect.github.com/cloudflare/circl/releases/tag/v1.6.2):
CIRCL v1.6.2

[Compare
Source](https://redirect.github.com/cloudflare/circl/compare/v1.6.1...v1.6.2)

##### CIRCL v1.6.2

-   New SLH-DSA, improvements in ML-DSA for arm64.
-   Tested compilation on WASM.

##### What's Changed

- Optimize pairing product computation by moving exponentiations to G1.
by [@&#8203;dfaranha](https://redirect.github.com/dfaranha) in
[https://github.com/cloudflare/circl/pull/547](https://redirect.github.com/cloudflare/circl/pull/547)
- sign: Adding SLH-DSA signature by
[@&#8203;armfazh](https://redirect.github.com/armfazh) in
[https://github.com/cloudflare/circl/pull/512](https://redirect.github.com/cloudflare/circl/pull/512)
- Update code generators to CIRCL v1.6.1. by
[@&#8203;armfazh](https://redirect.github.com/armfazh) in
[https://github.com/cloudflare/circl/pull/548](https://redirect.github.com/cloudflare/circl/pull/548)
- ML-DSA: Add preliminary Wycheproof test vectors by
[@&#8203;bwesterb](https://redirect.github.com/bwesterb) in
[https://github.com/cloudflare/circl/pull/552](https://redirect.github.com/cloudflare/circl/pull/552)
- go fmt by [@&#8203;bwesterb](https://redirect.github.com/bwesterb) in
[https://github.com/cloudflare/circl/pull/554](https://redirect.github.com/cloudflare/circl/pull/554)
- gz-compressing test vectors, use of HexBytes and ReadGzip functions.
by [@&#8203;armfazh](https://redirect.github.com/armfazh) in
[https://github.com/cloudflare/circl/pull/555](https://redirect.github.com/cloudflare/circl/pull/555)
- group: Removes use of elliptic Marshal and Unmarshal functions. by
[@&#8203;armfazh](https://redirect.github.com/armfazh) in
[https://github.com/cloudflare/circl/pull/556](https://redirect.github.com/cloudflare/circl/pull/556)
- Support encoding/decoding ML-DSA private keys (as long as they contain
seeds) by [@&#8203;bwesterb](https://redirect.github.com/bwesterb) in
[https://github.com/cloudflare/circl/pull/559](https://redirect.github.com/cloudflare/circl/pull/559)
- Update to golangci-lint v2 by
[@&#8203;bwesterb](https://redirect.github.com/bwesterb) in
[https://github.com/cloudflare/circl/pull/560](https://redirect.github.com/cloudflare/circl/pull/560)
- Preparation for ARM64 Implementation of poly operations for dilithium
package. by
[@&#8203;elementrics](https://redirect.github.com/elementrics) in
[https://github.com/cloudflare/circl/pull/562](https://redirect.github.com/cloudflare/circl/pull/562)
- prepare power2Round for custom implementations in assembly by
[@&#8203;elementrics](https://redirect.github.com/elementrics) in
[https://github.com/cloudflare/circl/pull/564](https://redirect.github.com/cloudflare/circl/pull/564)
- ARM64 implementation for poly.PackLe16 by
[@&#8203;elementrics](https://redirect.github.com/elementrics) in
[https://github.com/cloudflare/circl/pull/563](https://redirect.github.com/cloudflare/circl/pull/563)
- add arm64 version of polyMulBy2toD by
[@&#8203;elementrics](https://redirect.github.com/elementrics) in
[https://github.com/cloudflare/circl/pull/565](https://redirect.github.com/cloudflare/circl/pull/565)
- add arm64 version of polySub by
[@&#8203;elementrics](https://redirect.github.com/elementrics) in
[https://github.com/cloudflare/circl/pull/566](https://redirect.github.com/cloudflare/circl/pull/566)
- group: add byteLen method for short groups and RandomScalar uses
rand.Int by [@&#8203;armfazh](https://redirect.github.com/armfazh) in
[https://github.com/cloudflare/circl/pull/568](https://redirect.github.com/cloudflare/circl/pull/568)
- add arm64 version of poly.Add/Sub by
[@&#8203;elementrics](https://redirect.github.com/elementrics) in
[https://github.com/cloudflare/circl/pull/572](https://redirect.github.com/cloudflare/circl/pull/572)
- group: Adding cryptobyte marshaling to scalars by
[@&#8203;armfazh](https://redirect.github.com/armfazh) in
[https://github.com/cloudflare/circl/pull/569](https://redirect.github.com/cloudflare/circl/pull/569)
- Bumping up to Go1.25 by
[@&#8203;armfazh](https://redirect.github.com/armfazh) in
[https://github.com/cloudflare/circl/pull/574](https://redirect.github.com/cloudflare/circl/pull/574)
- ci: Including WASM compilation. by
[@&#8203;armfazh](https://redirect.github.com/armfazh) in
[https://github.com/cloudflare/circl/pull/577](https://redirect.github.com/cloudflare/circl/pull/577)
- Revert to using package-declared HPKE errors for shortkem instead of
standard library errors by
[@&#8203;harshiniwho](https://redirect.github.com/harshiniwho) in
[https://github.com/cloudflare/circl/pull/578](https://redirect.github.com/cloudflare/circl/pull/578)
- Release v1.6.2 by
[@&#8203;armfazh](https://redirect.github.com/armfazh) in
[https://github.com/cloudflare/circl/pull/579](https://redirect.github.com/cloudflare/circl/pull/579)

##### New Contributors

- [@&#8203;dfaranha](https://redirect.github.com/dfaranha) made their
first contribution in
[https://github.com/cloudflare/circl/pull/547](https://redirect.github.com/cloudflare/circl/pull/547)
- [@&#8203;elementrics](https://redirect.github.com/elementrics) made
their first contribution in
[https://github.com/cloudflare/circl/pull/562](https://redirect.github.com/cloudflare/circl/pull/562)
- [@&#8203;harshiniwho](https://redirect.github.com/harshiniwho) made
their first contribution in
[https://github.com/cloudflare/circl/pull/578](https://redirect.github.com/cloudflare/circl/pull/578)

**Full Changelog**:
https://github.com/cloudflare/circl/compare/v1.6.1...v1.6.2

</details>

---

### Configuration

📅 **Schedule**: Branch creation - "" (UTC), Automerge - Monday through
Friday ( * * * * 1-5 ) (UTC).

🚦 **Automerge**: Enabled.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Renovate
Bot](https://redirect.github.com/renovatebot/renovate).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4yNjQuMCIsInVwZGF0ZWRJblZlciI6IjM5LjI2NC4wIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJkZXBlbmRlbmNpZXMiLCJpbXBhY3Qvbm8tY2hhbmdlbG9nLXJlcXVpcmVkIl19-->

---------

Co-authored-by: pulumi-renovate[bot] <189166143+pulumi-renovate[bot]@users.noreply.github.com>
Co-authored-by: pulumi-bot <bot@pulumi.com>

go.sum

@@ -149,8 +149,8 @@ github.com/clipperhouse/displaywidth v0.10.0 h1:GhBG8WuerxjFQQYeuZAeVTuyxuX+Urai
 github.com/clipperhouse/displaywidth v0.10.0/go.mod h1:XqJajYsaiEwkxOj4bowCTMcT1SgvHo9flfF3jQasdbs=
 github.com/clipperhouse/uax29/v2 v2.7.0 h1:+gs4oBZ2gPfVrKPthwbMzWZDaAFPGYK72F0NJv2v7Vk=
 github.com/clipperhouse/uax29/v2 v2.7.0/go.mod h1:EFJ2TJMRUaplDxHKj1qAEhCtQPW2tJSwu5BF98AuoVM=
-github.com/cloudflare/circl v1.6.1 h1:zqIqSPIndyBh1bjLVVDHMPpVKqp8Su/V+6MeDzzQBQ0=
-github.com/cloudflare/circl v1.6.1/go.mod h1:uddAzsPgqdMAYatqJ0lsjX1oECcQLIlRpzZh3pJrofs=
+github.com/cloudflare/circl v1.6.3 h1:9GPOhQGF9MCYUeXyMYlqTR6a5gTrgR/fBLXvUgtVcg8=
+github.com/cloudflare/circl v1.6.3/go.mod h1:2eXP6Qfat4O/Yhh8BznvKnJ+uzEoTQ6jVKJRn81BiS4=
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/cncf/xds/go v0.0.0-20251210132809-ee656c7534f5 h1:6xNmx7iTtyBRev0+D/Tv1FZd4SCg8axKApyNyRsAt/w=
 github.com/cncf/xds/go v0.0.0-20251210132809-ee656c7534f5/go.mod h1:KdCmV+x/BuvyMxRnYBlmVaq4OLiKW6iRQfvC62cvdkI=