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fix: scope experimental cch signing to billing header

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This commit is contained in:
Luis Pater
2026-04-02 11:03:11 +08:00
parent d09dd4d0b2
commit 25d1c18a3f
2 changed files with 22 additions and 5 deletions
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2
go.mod
View File

@@ -81,7 +81,7 @@ require (
github.com/muesli/cancelreader v0.2.2 // indirect
github.com/muesli/termenv v0.16.0 // indirect
github.com/pelletier/go-toml/v2 v2.2.2 // indirect
github.com/pierrec/xxHash v0.1.5 // indirect
github.com/pierrec/xxHash v0.1.5
github.com/pjbgf/sha1cd v0.5.0 // indirect
github.com/rivo/uniseg v0.4.7 // indirect
github.com/rs/xid v1.5.0 // indirect

25
internal/runtime/executor/claude_signing.go
View File

@@ -8,19 +8,36 @@ import (
xxHash64 "github.com/pierrec/xxHash/xxHash64"
"github.com/router-for-me/CLIProxyAPI/v6/internal/config"
cliproxyauth "github.com/router-for-me/CLIProxyAPI/v6/sdk/cliproxy/auth"
"github.com/tidwall/gjson"
"github.com/tidwall/sjson"
)
const claudeCCHSeed uint64 = 0x6E52736AC806831E
var claudeBillingHeaderPlaceholderPattern = regexp.MustCompile(`(x-anthropic-billing-header:[^"]*?\bcch=)(00000)(;)`)
var claudeBillingHeaderCCHPattern = regexp.MustCompile(`\bcch=([0-9a-f]{5});`)
func signAnthropicMessagesBody(body []byte) []byte {
if !claudeBillingHeaderPlaceholderPattern.Match(body) {
billingHeader := gjson.GetBytes(body, "system.0.text").String()
if !strings.HasPrefix(billingHeader, "x-anthropic-billing-header:") {
return body
}
if !claudeBillingHeaderCCHPattern.MatchString(billingHeader) {
return body
}
cch := fmt.Sprintf("%05x", xxHash64.Checksum(body, claudeCCHSeed)&0xFFFFF)
return claudeBillingHeaderPlaceholderPattern.ReplaceAll(body, []byte("${1}"+cch+"${3}"))
unsignedBillingHeader := claudeBillingHeaderCCHPattern.ReplaceAllString(billingHeader, "cch=00000;")
unsignedBody, err := sjson.SetBytes(body, "system.0.text", unsignedBillingHeader)
if err != nil {
return body
}
cch := fmt.Sprintf("%05x", xxHash64.Checksum(unsignedBody, claudeCCHSeed)&0xFFFFF)
signedBillingHeader := claudeBillingHeaderCCHPattern.ReplaceAllString(unsignedBillingHeader, "cch="+cch+";")
signedBody, err := sjson.SetBytes(unsignedBody, "system.0.text", signedBillingHeader)
if err != nil {
return unsignedBody
}
return signedBody
}
func resolveClaudeKeyConfig(cfg *config.Config, auth *cliproxyauth.Auth) *config.ClaudeKey {