devel/crush: new port, crush 0.82.0

devel/crush/patches/patch-internal_oauth_claude_challenge_go

@@ -0,0 +1,31 @@
+--- /dev/null
++++ internal/oauth/claude/challenge.go
+@@ -0,0 +1,28 @@
++package claude
++
++import (
++	"crypto/rand"
++	"crypto/sha256"
++	"encoding/base64"
++	"strings"
++)
++
++// GetChallenge generates a PKCE verifier and its corresponding challenge.
++func GetChallenge() (verifier string, challenge string, err error) {
++	bytes := make([]byte, 32)
++	if _, err := rand.Read(bytes); err != nil {
++		return "", "", err
++	}
++	verifier = encodeBase64(bytes)
++	hash := sha256.Sum256([]byte(verifier))
++	challenge = encodeBase64(hash[:])
++	return verifier, challenge, nil
++}
++
++func encodeBase64(input []byte) (encoded string) {
++	encoded = base64.StdEncoding.EncodeToString(input)
++	encoded = strings.ReplaceAll(encoded, "=", "")
++	encoded = strings.ReplaceAll(encoded, "+", "-")
++	encoded = strings.ReplaceAll(encoded, "/", "_")
++	return encoded
++}