/
sg_ingress.go
242 lines (213 loc) · 5.89 KB
/
sg_ingress.go
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package handler
import (
"fmt"
"strings"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/service/ec2"
)
const CONVOX_MANAGED = "convox managed"
func HandleSGIngress(req Request) (string, map[string]string, error) {
defer recoverFailure(req)
switch req.RequestType {
case "Create":
fmt.Println("CREATING SG ingresses")
fmt.Printf("req %+v\n", req)
return SGIngressCreate(req)
case "Update":
fmt.Println("UPDATING SG ingresses")
fmt.Printf("req %+v\n", req)
return SGIngressUpdate(req)
case "Delete":
fmt.Println("no need to delete, since sg will be deleted")
fmt.Printf("req %+v\n", req)
return req.PhysicalResourceId, nil, nil
}
return "", nil, fmt.Errorf("unknown RequestType: %s", req.RequestType)
}
func SGIngressCreate(req Request) (string, map[string]string, error) {
err := sgIngressApply(req)
if err != nil {
return "invalid", nil, err
}
return fmt.Sprintf("ingress-%s", req.ResourceProperties["SecurityGroupID"].(string)), nil, nil
}
func SGIngressUpdate(req Request) (string, map[string]string, error) {
err := sgIngressApply(req)
if err != nil {
return "invalid", nil, err
}
return req.PhysicalResourceId, nil, nil
}
func sgIngressApply(req Request) error {
sgId := aws.String(req.ResourceProperties["SecurityGroupID"].(string))
newIpStrs := strings.Split(req.ResourceProperties["Ips"].(string), ",")
newSgStrs := strings.Split(req.ResourceProperties["SgIDs"].(string), ",")
res, err := EC2(req).DescribeSecurityGroups(&ec2.DescribeSecurityGroupsInput{
GroupIds: []*string{sgId},
})
if err != nil {
return err
}
var ipPermissions []*ec2.IpPermission
for _, group := range res.SecurityGroups {
ipPermissions = group.IpPermissions
}
var prevIps []*ec2.IpRange
var userDefinedIps []*ec2.IpRange
var prevSgIDs []string
var userDefinedSgIDs []string
for i := range ipPermissions {
if ipPermissions[i].IpProtocol != nil && *ipPermissions[i].IpProtocol == "tcp" &&
ipPermissions[i].FromPort != nil && *ipPermissions[i].FromPort == 443 &&
ipPermissions[i].ToPort != nil && *ipPermissions[i].ToPort == 443 {
for _, ipRange := range ipPermissions[i].IpRanges {
if ipRange.Description != nil && strings.Contains(*ipRange.Description, CONVOX_MANAGED) {
prevIps = append(prevIps, &ec2.IpRange{
CidrIp: ipRange.CidrIp,
})
} else {
userDefinedIps = append(userDefinedIps, &ec2.IpRange{
CidrIp: ipRange.CidrIp,
})
}
}
for _, idGroupPair := range ipPermissions[i].UserIdGroupPairs {
if idGroupPair.Description != nil && strings.Contains(*idGroupPair.Description, CONVOX_MANAGED) && idGroupPair.GroupId != nil {
prevSgIDs = append(prevSgIDs, *idGroupPair.GroupId)
} else if idGroupPair.GroupId != nil {
userDefinedSgIDs = append(userDefinedSgIDs, *idGroupPair.GroupId)
}
}
}
}
prevIpMap := map[string]int{}
for i := range prevIps {
if prevIps[i].CidrIp != nil {
prevIpMap[*prevIps[i].CidrIp] = 1
}
}
for i := range userDefinedIps {
if userDefinedIps[i].CidrIp != nil {
prevIpMap[*userDefinedIps[i].CidrIp] = 2 // not to be touched
}
}
var newIps []*ec2.IpRange
for _, ipStr := range newIpStrs {
cidr := strings.TrimSpace(ipStr)
if cidr != "" {
if _, has := prevIpMap[cidr]; !has {
newIps = append(newIps, &ec2.IpRange{
CidrIp: aws.String(cidr),
Description: aws.String(CONVOX_MANAGED),
})
}
prevIpMap[cidr] = 3
}
}
if len(newIps) > 0 {
_, err = EC2(req).AuthorizeSecurityGroupIngress(&ec2.AuthorizeSecurityGroupIngressInput{
GroupId: sgId,
IpPermissions: []*ec2.IpPermission{
{
FromPort: aws.Int64(443),
ToPort: aws.Int64(443),
IpProtocol: aws.String("tcp"),
IpRanges: newIps,
},
},
})
if err != nil {
return err
}
}
var deleteIps []*ec2.IpRange
for i := range prevIps {
if prevIps[i].CidrIp != nil {
if val := prevIpMap[*prevIps[i].CidrIp]; val == 1 {
if *prevIps[i].CidrIp == "0.0.0.0/0" && len(req.ResourceProperties["Ips"].(string)) == 0 {
continue
}
deleteIps = append(deleteIps, prevIps[i])
}
}
}
if len(deleteIps) > 0 {
_, err = EC2(req).RevokeSecurityGroupIngress(&ec2.RevokeSecurityGroupIngressInput{
GroupId: sgId,
IpPermissions: []*ec2.IpPermission{
{
FromPort: aws.Int64(443),
ToPort: aws.Int64(443),
IpProtocol: aws.String("tcp"),
IpRanges: deleteIps,
},
},
})
if err != nil {
return err
}
}
prevSgMap := map[string]int{}
for _, id := range prevSgIDs {
prevSgMap[id] = 1
}
for _, id := range userDefinedSgIDs {
prevSgMap[id] = 2 // not be touched
}
var newGrpPairs []*ec2.UserIdGroupPair
for _, id := range newSgStrs {
id = strings.TrimSpace(id)
if id != "" {
if _, has := prevSgMap[id]; !has {
newGrpPairs = append(newGrpPairs, &ec2.UserIdGroupPair{
Description: aws.String(CONVOX_MANAGED),
GroupId: aws.String(id),
})
} else {
prevSgMap[id] = 2
}
}
}
if len(newGrpPairs) > 0 {
_, err = EC2(req).AuthorizeSecurityGroupIngress(&ec2.AuthorizeSecurityGroupIngressInput{
GroupId: sgId,
IpPermissions: []*ec2.IpPermission{
{
FromPort: aws.Int64(443),
ToPort: aws.Int64(443),
IpProtocol: aws.String("tcp"),
UserIdGroupPairs: newGrpPairs,
},
},
})
if err != nil {
return err
}
}
var deleteGrpPairs []*ec2.UserIdGroupPair
for id, val := range prevSgMap {
if val == 1 {
deleteGrpPairs = append(deleteGrpPairs, &ec2.UserIdGroupPair{
GroupId: aws.String(id),
})
}
}
if len(deleteGrpPairs) > 0 {
_, err = EC2(req).RevokeSecurityGroupIngress(&ec2.RevokeSecurityGroupIngressInput{
GroupId: sgId,
IpPermissions: []*ec2.IpPermission{
{
FromPort: aws.Int64(443),
ToPort: aws.Int64(443),
IpProtocol: aws.String("tcp"),
UserIdGroupPairs: deleteGrpPairs,
},
},
})
if err != nil {
fmt.Println("5")
return err
}
}
return nil
}