fix: drop linkname to allow exec on go 1.23+

.github/workflows/test_and_lint.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.20'
+          go-version: '^1.23'
           cache: false
       - run: go get
       - run: go generate ./...
@@ -34,7 +34,7 @@ jobs:
         uses: actions/setup-go@v5
         with:
           cache: false
-          go-version: '1.20'
+          go-version: '^1.23'
       - run: go get
       - run: go generate ./...
       - name: Go vet

utils/crypto/rand_1.21.go

@@ -0,0 +1,23 @@
+//go:build !go1.22
+
+package crypto
+
+import (
+	_ "unsafe" // required by go:linkname
+)
+
+// randuint32 returns a lock free uint32 value.
+//
+// Too much legacy code has go:linkname references
+// to runtime.fastrand and friends, so keep these around for now.
+// Code should migrate to math/rand/v2.Uint64,
+// which is just as fast, but that's only available in Go 1.22+.
+// It would be reasonable to remove these in Go 1.24.
+// Do not call these from package runtime.
+//
+//go:linkname randuint32 runtime.fastrand
+func randuint32() uint32
+
+func RandU32() uint32 {
+	return randuint32()
+}

utils/crypto/rand_1.22.go

@@ -0,0 +1,11 @@
+//go:build go1.22
+
+package crypto
+
+import (
+	"math/rand/v2"
+)
+
+func RandU32() uint32 {
+	return rand.Uint32()
+}