5be8ba4b45
SAFE-T1201 (#807): Escape [MEMORY prefix in GLOBAL memory content on write to prevent delimiter-spoofing prompt injection. Content stored as "[_MEMORY " so it renders as text, not structure, when wrapped with the real delimiter on read. SAFE-T1102 (#805): Pin @molecule-ai/mcp-server@1.0.0 in .mcp.json.example. Prevents supply-chain attacks via unpinned npx -y. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
502 lines
18 KiB
Go
502 lines
18 KiB
Go
package handlers
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import (
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"context"
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"crypto/sha256"
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"encoding/hex"
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"encoding/json"
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"fmt"
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"log"
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"net/http"
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"regexp"
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"strings"
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"github.com/Molecule-AI/molecule-monorepo/platform/internal/db"
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"github.com/Molecule-AI/molecule-monorepo/platform/internal/registry"
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"github.com/gin-gonic/gin"
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)
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// globalMemoryDelimiter is the non-instructable prefix prepended to every
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// GLOBAL-scope memory value returned to MCP clients. Prevents stored content
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// from being parsed as LLM instructions in the agent's context window (#767).
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// Format: [MEMORY id=<uuid> scope=GLOBAL from=<workspace_id>]: <value>
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const globalMemoryDelimiter = "[MEMORY id=%s scope=GLOBAL from=%s]: %s"
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// defaultMemoryNamespace is used when a caller omits the field on POST or
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// when querying for memories written before migration 017. Matches the
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// column default in platform/migrations/017_memories_fts_namespace.up.sql.
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const defaultMemoryNamespace = "general"
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// memoryFTSMinQueryLen is the shortest query length that gets Postgres
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// full-text search treatment. Anything shorter uses ILIKE because
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// tsvector requires at least one token and single characters tokenise
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// to nothing in the 'english' config.
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const memoryFTSMinQueryLen = 2
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// secretPatternEntry is a compiled regex + its human-readable redaction label.
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type secretPatternEntry struct {
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re *regexp.Regexp
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label string
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}
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// memorySecretPatterns are checked in order — most-specific first so that
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// env-var assignments (OPENAI_API_KEY=sk-...) are caught before the generic
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// sk-* or base64 patterns consume only part of the match.
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//
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// Covered by SAFE-T1201 (issue #838).
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var memorySecretPatterns = []secretPatternEntry{
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// Env-var assignments: ANTHROPIC_API_KEY=sk-ant-... GITHUB_TOKEN=ghp_...
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{regexp.MustCompile(`(?i)\b[A-Z][A-Z0-9_]*_API_KEY\s*=\s*\S+`), "API_KEY"},
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{regexp.MustCompile(`(?i)\b[A-Z][A-Z0-9_]*_TOKEN\s*=\s*\S+`), "TOKEN"},
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{regexp.MustCompile(`(?i)\b[A-Z][A-Z0-9_]*_SECRET\s*=\s*\S+`), "SECRET"},
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// HTTP Bearer header values
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{regexp.MustCompile(`Bearer\s+\S+`), "BEARER_TOKEN"},
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// OpenAI / Anthropic sk-... key format
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{regexp.MustCompile(`sk-[A-Za-z0-9\-_]{16,}`), "SK_TOKEN"},
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// context7 tokens
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{regexp.MustCompile(`ctx7_[A-Za-z0-9]+`), "CTX7_TOKEN"},
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// High-entropy base64 blobs — must contain a base64-only char (+/=) OR
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// be longer than 40 chars to avoid false-positives on plain long words.
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{regexp.MustCompile(`[A-Za-z0-9+/]{33,}={0,2}`), "BASE64_BLOB"},
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}
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// redactSecrets scrubs known secret patterns from content before persistence.
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// Each distinct pattern class that fires logs a warning (without the value).
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// Returns the sanitised string and a bool indicating whether anything changed.
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// Failure is impossible — returns original content unchanged on any panic.
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func redactSecrets(workspaceID, content string) (out string, changed bool) {
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out = content
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for _, p := range memorySecretPatterns {
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replaced := p.re.ReplaceAllString(out, "[REDACTED:"+p.label+"]")
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if replaced != out {
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log.Printf("commit_memory: redacted %s pattern for workspace %s (SAFE-T1201)", p.label, workspaceID)
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out = replaced
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changed = true
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}
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}
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return out, changed
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}
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// EmbeddingFunc generates a 1536-dimensional dense-vector embedding for the
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// given text. Must return exactly 1536 float32 values on success.
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// Implementations must honour ctx cancellation.
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// nil is not a valid return on success — return a non-nil error instead.
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type EmbeddingFunc func(ctx context.Context, text string) ([]float32, error)
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// MemoriesHandler manages agent memory storage and recall.
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type MemoriesHandler struct {
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// embed generates vector embeddings for semantic search (issue #576).
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// nil disables the semantic path — all operations degrade gracefully to
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// the existing FTS/ILIKE path.
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embed EmbeddingFunc
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}
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// NewMemoriesHandler constructs a handler with FTS-only mode.
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// Wire up semantic search with WithEmbedding.
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func NewMemoriesHandler() *MemoriesHandler {
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return &MemoriesHandler{}
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}
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// WithEmbedding installs a vector-embedding function. Call during router
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// wiring, before the first request. Passing nil is a no-op. Chainable.
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func (h *MemoriesHandler) WithEmbedding(fn EmbeddingFunc) *MemoriesHandler {
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if fn != nil {
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h.embed = fn
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}
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return h
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}
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// formatVector encodes a float32 embedding slice as a pgvector literal
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// suitable for a ::vector cast, e.g. "[0.1,-0.05,0.42]".
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// Returns an empty string for nil/empty slices.
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func formatVector(v []float32) string {
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if len(v) == 0 {
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return ""
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}
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var b strings.Builder
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b.WriteByte('[')
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for i, x := range v {
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if i > 0 {
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b.WriteByte(',')
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}
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fmt.Fprintf(&b, "%g", x)
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}
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b.WriteByte(']')
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return b.String()
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}
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// Commit handles POST /workspaces/:id/memories
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// Stores a memory fact with a scope (LOCAL, TEAM, GLOBAL) and an optional
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// namespace (defaults to "general"). Namespaces implement the Holaboss
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// knowledge/{facts,procedures,blockers,reference}/ pattern so agents can
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// file and recall memories by category.
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//
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// When an EmbeddingFunc is configured, Commit also stores a vector embedding
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// so future Search calls can use cosine-similarity ordering. Embedding
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// failure is non-fatal: the memory is stored without an embedding and the
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// response is still 201.
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func (h *MemoriesHandler) Commit(c *gin.Context) {
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workspaceID := c.Param("id")
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ctx := c.Request.Context()
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var body struct {
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Content string `json:"content" binding:"required"`
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Scope string `json:"scope" binding:"required"` // LOCAL, TEAM, GLOBAL
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Namespace string `json:"namespace,omitempty"` // optional; defaults to "general"
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}
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if err := c.ShouldBindJSON(&body); err != nil {
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c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
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return
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}
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if body.Scope != "LOCAL" && body.Scope != "TEAM" && body.Scope != "GLOBAL" {
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c.JSON(http.StatusBadRequest, gin.H{"error": "scope must be LOCAL, TEAM, or GLOBAL"})
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return
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}
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namespace := body.Namespace
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if namespace == "" {
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namespace = defaultMemoryNamespace
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}
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if len(namespace) > 50 {
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c.JSON(http.StatusBadRequest, gin.H{"error": "namespace must be <= 50 characters"})
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return
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}
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// GLOBAL scope: only root workspaces (no parent) can write
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if body.Scope == "GLOBAL" {
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var parentID *string
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db.DB.QueryRowContext(ctx, `SELECT parent_id FROM workspaces WHERE id = $1`, workspaceID).Scan(&parentID)
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if parentID != nil {
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c.JSON(http.StatusForbidden, gin.H{"error": "only root workspaces can write GLOBAL memories"})
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return
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}
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}
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// SAFE-T1201: scrub secret patterns before persistence so that a confused
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// or prompt-injected agent cannot exfiltrate credentials into shared TEAM/
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// GLOBAL memory. Runs on every write, regardless of scope.
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content := body.Content
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content, _ = redactSecrets(workspaceID, content)
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// SAFE-T1201: prevent delimiter spoofing in GLOBAL memories (#807).
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// If content contains the delimiter prefix "[MEMORY ", an attacker could
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// craft a fake nested delimiter to inject instructions when the memory
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// is read back. Escape the bracket so it renders as text, not structure.
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if body.Scope == "GLOBAL" {
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content = strings.ReplaceAll(content, "[MEMORY ", "[_MEMORY ")
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}
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var memoryID string
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err := db.DB.QueryRowContext(ctx, `
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INSERT INTO agent_memories (workspace_id, content, scope, namespace)
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VALUES ($1, $2, $3, $4) RETURNING id
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`, workspaceID, content, body.Scope, namespace).Scan(&memoryID)
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if err != nil {
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log.Printf("Commit memory error: %v", err)
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c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to store memory"})
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return
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}
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// #767 Audit: write a GLOBAL memory audit log entry for forensic replay.
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// Records a SHA-256 hash of the content — never plaintext — so the audit
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// trail can prove what was written without leaking sensitive values.
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// Failure is non-fatal: a logging error must not roll back a successful write.
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if body.Scope == "GLOBAL" {
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// Hash the sanitised content so the audit trail reflects what was
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// actually persisted (not the raw, potentially secret-bearing input).
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sum := sha256.Sum256([]byte(content))
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auditBody, _ := json.Marshal(map[string]string{
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"memory_id": memoryID,
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"namespace": namespace,
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"content_sha256": hex.EncodeToString(sum[:]),
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})
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summary := "GLOBAL memory written: id=" + memoryID + " namespace=" + namespace
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if _, auditErr := db.DB.ExecContext(ctx, `
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INSERT INTO activity_logs (workspace_id, activity_type, source_id, summary, request_body, status)
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VALUES ($1, $2, $3, $4, $5::jsonb, $6)
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`, workspaceID, "memory_write_global", workspaceID, summary, string(auditBody), "ok"); auditErr != nil {
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log.Printf("Commit: GLOBAL memory audit log failed for %s/%s: %v", workspaceID, memoryID, auditErr)
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}
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}
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// Optionally embed and persist the vector. Non-fatal: the memory is
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// already stored above; a failed embedding just means this record will
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// be excluded from future cosine-similarity searches.
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if h.embed != nil {
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if vec, embedErr := h.embed(ctx, content); embedErr != nil {
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log.Printf("Commit: embedding failed workspace=%s memory=%s: %v (stored without embedding)",
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workspaceID, memoryID, embedErr)
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} else if fmtVec := formatVector(vec); fmtVec != "" {
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if _, updateErr := db.DB.ExecContext(ctx,
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`UPDATE agent_memories SET embedding = $1::vector WHERE id = $2`,
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fmtVec, memoryID,
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); updateErr != nil {
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log.Printf("Commit: embedding UPDATE failed workspace=%s memory=%s: %v",
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workspaceID, memoryID, updateErr)
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}
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}
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}
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c.JSON(http.StatusCreated, gin.H{"id": memoryID, "scope": body.Scope, "namespace": namespace})
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}
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// memoryRecallMaxLimit is the hard ceiling for results returned by Search.
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// Callers may request fewer via ?limit=N but never more (#377).
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const memoryRecallMaxLimit = 50
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// Search handles GET /workspaces/:id/memories
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// Searches memories visible to the requesting workspace.
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//
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// Supports:
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// - ?scope=LOCAL|TEAM|GLOBAL for access-control slicing
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// - ?q=... semantic search (cosine similarity) when an EmbeddingFunc is
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// configured AND the query can be embedded; falls back to FTS when the
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// embed call fails or no func is configured.
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// - ?q=... full-text search (ts_rank ordered) when len>=memoryFTSMinQueryLen
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// and no embedding is available; falls back to ILIKE for shorter strings.
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// - ?namespace=... additional filter on the Holaboss-style namespace tag
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// - ?limit=N max results (1–50); values >50 are silently clamped to 50 (#377)
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//
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// Semantic results include a "similarity_score" field (1 - cosine_distance).
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func (h *MemoriesHandler) Search(c *gin.Context) {
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workspaceID := c.Param("id")
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scope := c.DefaultQuery("scope", "")
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query := c.DefaultQuery("q", "")
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namespace := c.DefaultQuery("namespace", "")
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// Parse and cap the limit. Anything ≤0 or absent → 50 (full page).
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// Anything >50 → 50 (hard ceiling — never error, just clamp).
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limit := memoryRecallMaxLimit
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if raw := c.Query("limit"); raw != "" {
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var n int
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if _, err := fmt.Sscanf(raw, "%d", &n); err == nil && n > 0 && n < memoryRecallMaxLimit {
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limit = n
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}
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}
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ctx := c.Request.Context()
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// Get workspace info for access control
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var parentID *string
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db.DB.QueryRowContext(ctx, `SELECT parent_id FROM workspaces WHERE id = $1`, workspaceID).Scan(&parentID)
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// Try to generate a query embedding for semantic search.
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// Falls back to the existing FTS/ILIKE path on failure or when no
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// embedding function is configured.
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semanticVec := ""
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if query != "" && h.embed != nil {
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if vec, err := h.embed(ctx, query); err != nil {
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log.Printf("Search: embedding failed workspace=%s: %v — falling back to FTS", workspaceID, err)
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} else {
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semanticVec = formatVector(vec)
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}
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}
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var sqlQuery string
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var args []interface{}
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semantic := semanticVec != ""
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if semantic {
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// ── Semantic search path ──────────────────────────────────────────
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// Build scope-specific WHERE fragment and initial args.
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isJoin := scope == "TEAM"
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var baseWhere string
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switch scope {
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case "LOCAL":
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baseWhere = `workspace_id = $1 AND scope = 'LOCAL'`
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args = []interface{}{workspaceID}
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case "TEAM":
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if parentID != nil {
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baseWhere = `m.scope = 'TEAM' AND w.status != 'removed' AND (w.parent_id = $1 OR w.id = $1)`
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args = []interface{}{*parentID}
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} else {
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baseWhere = `m.scope = 'TEAM' AND w.status != 'removed' AND (w.parent_id = $1 OR w.id = $1)`
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args = []interface{}{workspaceID}
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}
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case "GLOBAL":
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baseWhere = `scope = 'GLOBAL'`
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args = []interface{}{}
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default:
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baseWhere = `workspace_id = $1`
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args = []interface{}{workspaceID}
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}
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if namespace != "" {
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nsArg := nextArg(len(args))
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if isJoin {
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baseWhere += ` AND m.namespace = ` + nsArg
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} else {
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baseWhere += ` AND namespace = ` + nsArg
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}
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args = append(args, namespace)
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}
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// $vecPos appears twice (SELECT + ORDER BY) — PostgreSQL resolves
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// both to the same bound value, so we append it only once.
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vecPos := nextArg(len(args))
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limitPos := nextArg(len(args) + 1)
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if isJoin {
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sqlQuery = `SELECT m.id, m.workspace_id, m.content, m.scope, m.namespace, m.created_at,` +
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` 1 - (m.embedding <=> ` + vecPos + `::vector) AS similarity_score` +
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` FROM agent_memories m JOIN workspaces w ON w.id = m.workspace_id` +
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` WHERE ` + baseWhere + ` AND m.embedding IS NOT NULL` +
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` ORDER BY m.embedding <=> ` + vecPos + `::vector` +
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` LIMIT ` + limitPos
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} else {
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sqlQuery = `SELECT id, workspace_id, content, scope, namespace, created_at,` +
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` 1 - (embedding <=> ` + vecPos + `::vector) AS similarity_score` +
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` FROM agent_memories` +
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` WHERE ` + baseWhere + ` AND embedding IS NOT NULL` +
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` ORDER BY embedding <=> ` + vecPos + `::vector` +
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` LIMIT ` + limitPos
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}
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args = append(args, semanticVec, limit)
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} else {
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// ── FTS / ILIKE / plain path ──────────────────────────────────────
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switch scope {
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case "LOCAL":
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// Only this workspace's memories
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sqlQuery = `SELECT id, workspace_id, content, scope, namespace, created_at FROM agent_memories WHERE workspace_id = $1 AND scope = 'LOCAL'`
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args = []interface{}{workspaceID}
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case "TEAM":
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// Team = self + parent + siblings (same parent_id)
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if parentID != nil {
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// Child workspace: team is parent + siblings sharing same parent_id
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sqlQuery = `SELECT m.id, m.workspace_id, m.content, m.scope, m.namespace, m.created_at
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FROM agent_memories m
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JOIN workspaces w ON w.id = m.workspace_id
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WHERE m.scope = 'TEAM' AND w.status != 'removed'
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AND (w.parent_id = $1 OR w.id = $1)`
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args = []interface{}{*parentID}
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} else {
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// Root workspace: team is self + direct children only
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sqlQuery = `SELECT m.id, m.workspace_id, m.content, m.scope, m.namespace, m.created_at
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FROM agent_memories m
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JOIN workspaces w ON w.id = m.workspace_id
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WHERE m.scope = 'TEAM' AND w.status != 'removed'
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AND (w.parent_id = $1 OR w.id = $1)`
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args = []interface{}{workspaceID}
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}
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case "GLOBAL":
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// All GLOBAL memories (readable by everyone)
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sqlQuery = `SELECT id, workspace_id, content, scope, namespace, created_at FROM agent_memories WHERE scope = 'GLOBAL'`
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args = []interface{}{}
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default:
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// All accessible memories
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sqlQuery = `SELECT id, workspace_id, content, scope, namespace, created_at FROM agent_memories WHERE workspace_id = $1`
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args = []interface{}{workspaceID}
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}
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// Namespace filter (optional) — applies regardless of scope.
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if namespace != "" {
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sqlQuery += ` AND namespace = ` + nextArg(len(args))
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args = append(args, namespace)
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}
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// Text search: FTS with ts_rank ordering for multi-char queries,
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// ILIKE fallback for 1-char and empty-after-tokenization edge cases.
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ftsActive := false
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if len(query) >= memoryFTSMinQueryLen {
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sqlQuery += ` AND content_tsv @@ plainto_tsquery('english', ` + nextArg(len(args)) + `)`
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args = append(args, query)
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ftsActive = true
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} else if query != "" {
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sqlQuery += ` AND content ILIKE ` + nextArg(len(args))
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args = append(args, "%"+query+"%")
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}
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if ftsActive {
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// Rank FTS hits first, tie-break by recency.
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sqlQuery += ` ORDER BY ts_rank(content_tsv, plainto_tsquery('english', ` + nextArg(len(args)) + `)) DESC, created_at DESC`
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args = append(args, query)
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} else {
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sqlQuery += ` ORDER BY created_at DESC`
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}
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sqlQuery += ` LIMIT ` + nextArg(len(args))
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args = append(args, limit)
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}
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rows, err := db.DB.QueryContext(ctx, sqlQuery, args...)
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if err != nil {
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log.Printf("Search memories error: %v", err)
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c.JSON(http.StatusInternalServerError, gin.H{"error": "search failed"})
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return
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}
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defer rows.Close()
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memories := make([]map[string]interface{}, 0)
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for rows.Next() {
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var id, wsID, content, memScope, memNS, createdAt string
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entry := map[string]interface{}{}
|
||
|
||
if semantic {
|
||
var simScore float64
|
||
if rows.Scan(&id, &wsID, &content, &memScope, &memNS, &createdAt, &simScore) != nil {
|
||
continue
|
||
}
|
||
entry["similarity_score"] = simScore
|
||
} else {
|
||
if rows.Scan(&id, &wsID, &content, &memScope, &memNS, &createdAt) != nil {
|
||
continue
|
||
}
|
||
}
|
||
|
||
// Access control check for TEAM scope
|
||
if memScope == "TEAM" && wsID != workspaceID {
|
||
if !registry.CanCommunicate(workspaceID, wsID) {
|
||
continue // Skip memories from workspaces we can't reach
|
||
}
|
||
}
|
||
|
||
// #767: wrap GLOBAL-scope content with a non-instructable delimiter so
|
||
// MCP tool outputs cannot be hijacked by stored prompt-injection payloads.
|
||
// The raw content in the DB is unchanged — only the value returned to
|
||
// callers is wrapped. Applied on both the semantic and FTS paths.
|
||
if memScope == "GLOBAL" {
|
||
content = fmt.Sprintf(globalMemoryDelimiter, id, wsID, content)
|
||
}
|
||
|
||
entry["id"] = id
|
||
entry["workspace_id"] = wsID
|
||
entry["content"] = content
|
||
entry["scope"] = memScope
|
||
entry["namespace"] = memNS
|
||
entry["created_at"] = createdAt
|
||
memories = append(memories, entry)
|
||
}
|
||
if err := rows.Err(); err != nil {
|
||
log.Printf("Search memories rows.Err: %v", err)
|
||
}
|
||
|
||
c.JSON(http.StatusOK, memories)
|
||
}
|
||
|
||
// Delete handles DELETE /workspaces/:id/memories/:memoryId
|
||
func (h *MemoriesHandler) Delete(c *gin.Context) {
|
||
workspaceID := c.Param("id")
|
||
memoryID := c.Param("memoryId")
|
||
ctx := c.Request.Context()
|
||
|
||
result, err := db.DB.ExecContext(ctx,
|
||
`DELETE FROM agent_memories WHERE id = $1 AND workspace_id = $2`, memoryID, workspaceID)
|
||
if err != nil {
|
||
c.JSON(http.StatusInternalServerError, gin.H{"error": "delete failed"})
|
||
return
|
||
}
|
||
|
||
rows, _ := result.RowsAffected()
|
||
if rows == 0 {
|
||
c.JSON(http.StatusNotFound, gin.H{"error": "memory not found or not owned by this workspace"})
|
||
return
|
||
}
|
||
|
||
c.JSON(http.StatusOK, gin.H{"status": "deleted"})
|
||
}
|
||
|
||
func nextArg(current int) string {
|
||
return fmt.Sprintf("$%d", current+1)
|
||
} |