70 lines
2 KiB
Go
70 lines
2 KiB
Go
package ipia
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import (
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"context"
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"fmt"
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"strings"
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"github.com/sipeed/picoclaw/pkg/agent"
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)
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var injectionPatterns = []string{
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"ignore previous instructions",
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"ignore all previous instructions",
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"ignore the above instructions",
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"system prompt:",
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"you are now an admin",
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"new mission:",
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"forget your safety guidelines",
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"stay in character as",
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"dan mode",
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}
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// Detector implements the agent.ToolInterceptor interface to detect indirect prompt injection.
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type Detector struct {
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Enabled bool
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}
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// Ensure Detector implements ToolInterceptor.
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var _ agent.ToolInterceptor = (*Detector)(nil)
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// NewDetector creates a new IPIA detector.
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func NewDetector(enabled bool) *Detector {
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return &Detector{Enabled: enabled}
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}
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func (d *Detector) scan(text string) (bool, string) {
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lower := strings.ToLower(text)
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for _, pattern := range injectionPatterns {
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if strings.Contains(lower, pattern) {
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return true, pattern
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}
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}
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return false, ""
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}
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func (d *Detector) BeforeTool(ctx context.Context, call *agent.ToolCallHookRequest) (*agent.ToolCallHookRequest, agent.HookDecision, error) {
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return call, agent.HookDecision{Action: agent.HookActionContinue}, nil
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}
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func (d *Detector) AfterTool(ctx context.Context, resp *agent.ToolResultHookResponse) (*agent.ToolResultHookResponse, agent.HookDecision, error) {
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if !d.Enabled || resp == nil || resp.Result == nil {
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return resp, agent.HookDecision{Action: agent.HookActionContinue}, nil
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}
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if found, pattern := d.scan(resp.Result.ForLLM); found {
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return resp, agent.HookDecision{
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Action: agent.HookActionAbortTurn,
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Reason: fmt.Sprintf("Indirect prompt injection detected in tool output (pattern: %q)", pattern),
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}, nil
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}
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if found, pattern := d.scan(resp.Result.ForUser); found {
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return resp, agent.HookDecision{
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Action: agent.HookActionAbortTurn,
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Reason: fmt.Sprintf("Indirect prompt injection detected in tool output (pattern: %q)", pattern),
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}, nil
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}
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return resp, agent.HookDecision{Action: agent.HookActionContinue}, nil
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}
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