395 lines
11 KiB
Go
395 lines
11 KiB
Go
package main
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import (
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"bytes"
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"crypto/dsa"
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"crypto/ecdsa"
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"crypto/rsa"
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"crypto/sha256"
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"crypto/x509"
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"database/sql"
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"database/sql/driver"
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"encoding/json"
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"errors"
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"fmt"
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_ "github.com/lib/pq"
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"io/ioutil"
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"log"
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"math/big"
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"strings"
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"time"
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"github.com/gomodule/redigo/redis"
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)
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type BigNumber big.Int
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type certMapElm struct {
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CertHash string
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chain chain
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*x509.Certificate
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}
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type sessionRecord struct {
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ServerIP string
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ServerPort string
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ClientIP string
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ClientPort string
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TLSH string
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Timestamp time.Time
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JA3 string
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JA3Digest string
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JA3S string
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JA3SDigest string
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Certificates []certMapElm
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}
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type chain struct {
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isValid bool
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isSS bool
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s string
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}
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var db *sql.DB
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//var db *sqlx.DB
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var cr redis.Conn
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var connectRedis = false
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var connectDB = true
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func main() {
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if connectDB {
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initDB()
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defer db.Close()
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}
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var jsonPath string
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if connectRedis {
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initRedis()
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//defer cr.Close()
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// pop redis queue
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for {
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err := errors.New("")
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jsonPath, err = redis.String(cr.Do("LPOP", "analyzer:ja3-jl:0894517855f047d2a77b4473d3a9cc5b"))
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if err != nil {
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log.Fatal("Queue processed")
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}
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}
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} else {
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var path []string
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path = append(path, "./sessions")
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path = append(path, "")
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files, err := ioutil.ReadDir(path[0])
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if err != nil {
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log.Fatal(err)
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}
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for _, f := range files {
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path[1] = f.Name()
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jsonPath = strings.Join(path, "/")
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// read corresponding json file
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dat, err := ioutil.ReadFile(jsonPath)
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if err != nil {
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log.Fatal(err)
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}
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// Unmarshal JSON file
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s := sessionRecord{}
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_ = json.Unmarshal([]byte(dat), &s)
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if isValid(&s){
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// Create ja3* records
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err = insertJA3(&s)
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if err != nil {
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log.Fatal(fmt.Sprintf("Could not insert JA3 into DB: %q", err))
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}
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// Insert Session
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ids, err := insertSession(&s)
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if err != nil {
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log.Fatal(fmt.Sprintf("Insert Sessions into DB failed: %q", err))
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}
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err = insertFuzzyHash(&s, ids)
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if err != nil {
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log.Fatal(fmt.Sprintf("Insert Fuzzy Hash into DB failed: %q", err))
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}
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// Attempt to roughly build a chain of trust
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session := buildChain(&s)
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// Insert Certificates
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idc, err := insertCertificates(session)
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if err != nil {
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log.Fatal(fmt.Sprintf("Insert Certificate into DB failed: %q", err))
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}
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// Create the relationship between certificates and sessions
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err = linkSessionCerts(ids, idc)
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if err != nil {
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log.Fatal(fmt.Sprintf("Could not link Certs and Session into DB: %q", err))
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}
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}
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}
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}
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}
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func isValid(s * sessionRecord) bool {
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// Relationships
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if len(s.Certificates) < 1 || s.JA3Digest == "" || s.JA3 == "" {
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return false
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}
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// Basic informations
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if s.ClientPort == "" || s.ServerPort == "" || s.ServerIP == "" || s.ClientIP == "" {
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return false
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}
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return true
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}
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func insertJA3(s *sessionRecord) error {
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q := `INSERT INTO "ja3" (hash, raw, type) VALUES ($1, $2, $3) ON CONFLICT DO NOTHING`
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_, err := db.Exec(q, s.JA3Digest, s.JA3, "ja3")
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if err != nil {
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return err
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}
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q = `INSERT INTO "ja3" (hash, raw, type) VALUES ($1, $2, $3) ON CONFLICT DO NOTHING`
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_, err = db.Exec(q, s.JA3SDigest, s.JA3S, "ja3s")
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if err != nil {
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return err
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}
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return nil
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}
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func insertFuzzyHash(s *sessionRecord, ids int64) error {
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q := `INSERT INTO "fuzzy_hash" (type, value, "id_sessionRecord") VALUES ($1, $2, $3) ON CONFLICT DO NOTHING`
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_, err := db.Exec(q, "TLSH", s.TLSH, ids)
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if err != nil {
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return err
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}
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return nil
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}
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// insertPublicKeys insert each public key of each certificate of a session
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func insertPublicKey(c x509.Certificate) (string, error) {
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pub, err := x509.ParsePKIXPublicKey(c.RawSubjectPublicKeyInfo)
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hash := fmt.Sprintf("%x", sha256.Sum256(c.RawSubjectPublicKeyInfo))
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if err != nil {
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return hash, nil
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}
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switch pub := pub.(type) {
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case *rsa.PublicKey:
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q := `INSERT INTO "public_key" (hash, type, modulus, exponent, modulus_size) VALUES ($1, $2, $3, $4, $5) ON CONFLICT DO NOTHING`
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_, err := db.Exec(q, hash, "RSA", (*BigNumber)(pub.N), pub.E, pub.Size())
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if err != nil {
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return hash, err
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}
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case *dsa.PublicKey:
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q := `INSERT INTO "public_key" (hash, type, "G", "P", "Q", "Y") VALUES ($1, $2, $3, $4, $5, $6) ON CONFLICT DO NOTHING`
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_, err := db.Exec(q, hash, "DSA", (*BigNumber)(pub.Parameters.G), (*BigNumber)(pub.Parameters.P), (*BigNumber)(pub.Parameters.Q), (*BigNumber)(pub.Y))
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if err != nil {
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return hash, err
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}
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case *ecdsa.PublicKey:
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q := `INSERT INTO "public_key" (hash, type, "Y", "X", "P", "N", "B", "bitsize", "Gx", "Gy", "curve_name") VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11) ON CONFLICT DO NOTHING`
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_, err := db.Exec(q, hash, "ECDSA", (*BigNumber)(pub.Y), (*BigNumber)(pub.X), (*BigNumber)(pub.Curve.Params().P), (*BigNumber)(pub.Curve.Params().N), (*BigNumber)(pub.Curve.Params().B), pub.Curve.Params().BitSize, (*BigNumber)(pub.Curve.Params().Gx), (*BigNumber)(pub.Curve.Params().Gy), pub.Params().Name)
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if err != nil {
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return hash, err
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}
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default:
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return hash, fmt.Errorf("PKIx: could not determine the type of key %g", pub)
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}
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return hash, nil
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}
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func (bn *BigNumber) Value() (driver.Value, error) {
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return driver.Value((*big.Int)(bn).Text(10)), nil
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}
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// linkSessionCerts creates the link between a session and its certificates
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func linkSessionCerts(ids int64, idc []string) error {
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for _, i := range idc {
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q := `INSERT INTO "many_sessionRecord_has_many_certificate" ("id_sessionRecord", "hash_certificate") VALUES ($1, $2) ON CONFLICT DO NOTHING `
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_, err := db.Exec(q, ids, i)
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if err != nil {
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return err
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}
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}
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return nil
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}
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// buildChain attempts to rearrange certificate as a chain of trust from a sessionRecord (that
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// contains a slice of certificate). If the chain of trust is build successfully
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// it marked as valid, If not root is found or if the chain is broken, it
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// does not touch the original slice and mark the chain as invalid.
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func buildChain(s *sessionRecord) *sessionRecord {
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certChain := make([]certMapElm, 0)
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// First find if there are any duplicates certificate
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dedup := unique(s.Certificates)
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deduplen := len(dedup)
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if deduplen > 1 {
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// Then we find the leaf
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removed := 0
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for i, c := range dedup {
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if !c.Certificate.IsCA {
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certChain = append(certChain, c)
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// Remove this element from the list
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dedup = append(dedup[:i-removed], dedup[i+1-removed:]...)
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removed++
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}
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}
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cursor := len(certChain)
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// Find the parent of each certificate
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for i := 0; i < cursor; i++ {
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p, success, isSS := findParent(dedup, certChain[i])
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// if we found a root, no need to go any further
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if isSS {
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p.chain.isSS = true
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certChain = append(certChain, p)
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break
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}
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if success {
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p.chain.isSS = false
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certChain = append(certChain, p)
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}
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cursor = len(certChain)
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}
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// Write the new chain if it's valid
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if len(certChain) >= deduplen-1 {
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cstr := make([]string, 0)
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for i := len(certChain) - 1; i >= 0; i-- {
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certChain[i].chain.isValid = true
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if !certChain[i].chain.isSS {
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cstr = append(cstr, certChain[i].CertHash)
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certChain[i].chain.s = strings.Join(cstr, ".")
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}
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}
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tmp := s
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tmp.Certificates = certChain
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return tmp
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}
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// Only one cert in the chain
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} else {
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s.Certificates[0].chain = chain{true, s.Certificates[0].Certificate.Issuer.String() == s.Certificates[0].Certificate.Subject.String(), s.Certificates[0].CertHash}
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}
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return s
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}
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func findParent(dedup []certMapElm, c certMapElm) (certMapElm, bool, bool) {
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// A Root or SSC signs itself
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if c.Certificate.Subject.String() == c.Certificate.Issuer.String() {
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return c, true, true
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}
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// A leaf or a node has a parent
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for _, candidate := range dedup {
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if candidate.Certificate.Subject.String() == c.Certificate.Issuer.String() {
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return candidate, true, false
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}
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}
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return c, false, false
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}
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func unique(s []certMapElm) []certMapElm {
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keys := make(map[string]bool)
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var list []certMapElm
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for _, entry := range s {
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if _, value := keys[entry.CertHash]; !value {
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keys[entry.CertHash] = true
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list = append(list, entry)
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}
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}
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return list
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}
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func insertCertificate(c certMapElm) (string, error) {
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q := `INSERT INTO "certificate" (hash, "is_CA", "is_SS", issuer, subject, cert_chain, is_valid_chain, file_path) VALUES ($1, $2, $3, $4, $5, $6, $7, $8) ON CONFLICT DO NOTHING`
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_, err := db.Exec(q, c.CertHash, c.Certificate.IsCA, c.chain.isSS, c.Certificate.Issuer.String(), c.Certificate.Subject.String(), c.chain.s, c.chain.isValid, getFullPath(c.CertHash))
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if err != nil {
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return c.CertHash, err
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}
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key, err := insertPublicKey(*c.Certificate)
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if err != nil {
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return c.CertHash, err
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}
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fmt.Println(c.CertHash)
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fmt.Println(key)
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q = `INSERT INTO "many_certificate_has_many_public_key" ("hash_certificate", "hash_public_key") VALUES ($1, $2) ON CONFLICT DO NOTHING `
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_, err = db.Exec(q, c.CertHash, key)
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if err != nil {
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return c.CertHash, err
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}
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return c.CertHash, nil
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}
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// getFullPath takes a certificate's hash and return the full path to
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// its location on disk
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func getFullPath(h string) string {
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return "TODO PATH"
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}
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func insertCertificates(s *sessionRecord) ([]string, error) {
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var inserted []string
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for _, certificate := range s.Certificates {
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tmp, err := insertCertificate(certificate)
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inserted = append(inserted, tmp)
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if err != nil {
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return inserted, err
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}
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}
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return inserted, nil
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}
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func insertSession(s *sessionRecord) (int64, error) {
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q := `INSERT INTO "sessionRecord" (dst_ip, src_ip, dst_port, src_port, timestamp, hash_ja3) VALUES ($1, $2, $3, $4, $5, $6) RETURNING id`
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var id int64
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err := db.QueryRow(q, s.ServerIP, s.ClientIP, s.ServerPort, s.ClientPort, s.Timestamp, s.JA3Digest).Scan(&id)
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if err != nil {
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return 0, err
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}
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return id, nil
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}
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func initRedis() {
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err := errors.New("")
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cr, err = redis.Dial("tcp", ":6380", redis.DialDatabase(2))
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if err != nil {
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panic(err)
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}
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}
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func initDB() {
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connStr := "user=postgres password=postgres dbname=passive_ssl"
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err := errors.New("")
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db, err = sql.Open("postgres", connStr)
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if err != nil {
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log.Fatalln(err)
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}
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}
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// String returns a string that describes a TLSSession
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func (t *sessionRecord) String() string {
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var buf bytes.Buffer
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buf.WriteString(fmt.Sprintf("---------------SESSION START-------------------\n"))
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buf.WriteString(fmt.Sprintf("Time: %v\n", t.Timestamp))
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buf.WriteString(fmt.Sprintf("Client: %v:%v\n", t.ClientIP, t.ClientPort))
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buf.WriteString(fmt.Sprintf("Server: %v:%v\n", t.ServerIP, t.ServerPort))
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buf.WriteString(fmt.Sprintf("TLSH: %q\n", t.TLSH))
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buf.WriteString(fmt.Sprintf("ja3: %q\n", t.JA3))
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buf.WriteString(fmt.Sprintf("ja3 Digest: %q\n", t.JA3Digest))
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buf.WriteString(fmt.Sprintf("ja3s: %q\n", t.JA3S))
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buf.WriteString(fmt.Sprintf("ja3s Digest: %q\n", t.JA3SDigest))
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for _, certMe := range t.Certificates {
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buf.WriteString(fmt.Sprintf("Certificate Issuer: %q\n", certMe.Certificate.Issuer))
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buf.WriteString(fmt.Sprintf("Certificate Subject: %q\n", certMe.Certificate.Subject))
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buf.WriteString(fmt.Sprintf("Certificate is CA: %t\n", certMe.Certificate.IsCA))
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buf.WriteString(fmt.Sprintf("Certificate SHA256: %q\n", certMe.CertHash))
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}
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buf.WriteString(fmt.Sprintf("---------------SESSION END--------------------\n"))
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return buf.String()
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}
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