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allow to filter connections by username

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Added new rule operand 'user.name' to filter connections by username.

More info #1236
This commit is contained in:
Gustavo Iñiguez Goia 2025-01-09 17:15:28 +01:00
parent c0be3d15dc
commit ff3ac6663a
Failed to generate hash of commit
1 changed files with 12 additions and 1 deletions
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13
daemon/rule/operator.go
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@ -5,6 +5,7 @@ import (
"fmt" "fmt"
"net" "net"
"os" "os"
"os/user"
"reflect" "reflect"
"regexp" "regexp"
"strconv" "strconv"
@ -47,6 +48,7 @@ const (
OpProcessHashMD5 = Operand("process.hash.md5") OpProcessHashMD5 = Operand("process.hash.md5")
OpProcessHashSHA1 = Operand("process.hash.sha1") OpProcessHashSHA1 = Operand("process.hash.sha1")
OpUserID = Operand("user.id") OpUserID = Operand("user.id")
OpUserName = Operand("user.name")
OpSrcIP = Operand("source.ip") OpSrcIP = Operand("source.ip")
OpSrcPort = Operand("source.port") OpSrcPort = Operand("source.port")
OpDstIP = Operand("dest.ip") OpDstIP = Operand("dest.ip")
@ -209,6 +211,15 @@ func (o *Operator) Compile() error {
o.cb = o.cmpNetwork o.cb = o.cmpNetwork
} }
} }
if o.Operand == OpUserName && o.Type == Simple {
// TODO: allow regexps, take into account users from containers.
u, err := user.Lookup(o.Data)
if err != nil {
return fmt.Errorf("user.name Operand error: %s", err)
}
o.cb = o.simpleCmp
o.Data = u.Uid
}
if o.Operand == OpDomainsLists { if o.Operand == OpDomainsLists {
if o.Data == "" { if o.Data == "" {
return fmt.Errorf("Operand lists is empty, nothing to load: %s", o) return fmt.Errorf("Operand lists is empty, nothing to load: %s", o)
@ -382,7 +393,7 @@ func (o *Operator) Match(con *conman.Connection, hasChecksums bool) bool {
return o.cb(con.DstHost) return o.cb(con.DstHost)
} else if o.Operand == OpIPLists { } else if o.Operand == OpIPLists {
return o.cb(con.DstIP.String()) return o.cb(con.DstIP.String())
} else if o.Operand == OpUserID { } else if o.Operand == OpUserID || o.Operand == OpUserName {
return o.cb(strconv.Itoa(con.Entry.UserId)) return o.cb(strconv.Itoa(con.Entry.UserId))
} else if o.Operand == OpDstNetwork { } else if o.Operand == OpDstNetwork {
return o.cb(con.DstIP) return o.cb(con.DstIP)