mirror of https://github.com/hashicorp/consul
103 lines
2.9 KiB
Go
103 lines
2.9 KiB
Go
package connect
|
|
|
|
import (
|
|
"fmt"
|
|
"net/url"
|
|
"regexp"
|
|
"strings"
|
|
|
|
"github.com/hashicorp/consul/agent/structs"
|
|
)
|
|
|
|
// CertURI represents a Connect-valid URI value for a TLS certificate.
|
|
// The user should type switch on the various implementations in this
|
|
// package to determine the type of URI and the data encoded within it.
|
|
//
|
|
// Note that the current implementations of this are all also SPIFFE IDs.
|
|
// However, we anticipate that we may accept URIs that are also not SPIFFE
|
|
// compliant and therefore the interface is named as such.
|
|
type CertURI interface {
|
|
// Authorize tests the authorization for this URI as a client
|
|
// for the given intention. The return value `auth` is only valid if
|
|
// the second value `match` is true. If the second value `match` is
|
|
// false, then the intention doesn't match this client and any
|
|
// result should be ignored.
|
|
Authorize(*structs.Intention) (auth bool, match bool)
|
|
|
|
// URI is the valid URI value used in the cert.
|
|
URI() *url.URL
|
|
}
|
|
|
|
var (
|
|
spiffeIDServiceRegexp = regexp.MustCompile(
|
|
`^/ns/([^/]+)/dc/([^/]+)/svc/([^/]+)$`)
|
|
)
|
|
|
|
// ParseCertURIFromString attempts to parse a string representation of a
|
|
// certificate URI as a convenience helper around ParseCertURI.
|
|
func ParseCertURIFromString(input string) (CertURI, error) {
|
|
// Parse the certificate URI from the string
|
|
uriRaw, err := url.Parse(input)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return ParseCertURI(uriRaw)
|
|
}
|
|
|
|
// ParseCertURI parses a the URI value from a TLS certificate.
|
|
func ParseCertURI(input *url.URL) (CertURI, error) {
|
|
if input.Scheme != "spiffe" {
|
|
return nil, fmt.Errorf("SPIFFE ID must have 'spiffe' scheme")
|
|
}
|
|
|
|
// Path is the raw value of the path without url decoding values.
|
|
// RawPath is empty if there were no encoded values so we must
|
|
// check both.
|
|
path := input.Path
|
|
if input.RawPath != "" {
|
|
path = input.RawPath
|
|
}
|
|
|
|
// Test for service IDs
|
|
if v := spiffeIDServiceRegexp.FindStringSubmatch(path); v != nil {
|
|
// Determine the values. We assume they're sane to save cycles,
|
|
// but if the raw path is not empty that means that something is
|
|
// URL encoded so we go to the slow path.
|
|
ns := v[1]
|
|
dc := v[2]
|
|
service := v[3]
|
|
if input.RawPath != "" {
|
|
var err error
|
|
if ns, err = url.PathUnescape(v[1]); err != nil {
|
|
return nil, fmt.Errorf("Invalid namespace: %s", err)
|
|
}
|
|
if dc, err = url.PathUnescape(v[2]); err != nil {
|
|
return nil, fmt.Errorf("Invalid datacenter: %s", err)
|
|
}
|
|
if service, err = url.PathUnescape(v[3]); err != nil {
|
|
return nil, fmt.Errorf("Invalid service: %s", err)
|
|
}
|
|
}
|
|
|
|
return &SpiffeIDService{
|
|
Host: input.Host,
|
|
Namespace: ns,
|
|
Datacenter: dc,
|
|
Service: service,
|
|
}, nil
|
|
}
|
|
|
|
// Test for signing ID
|
|
if input.Path == "" {
|
|
idx := strings.Index(input.Host, ".")
|
|
if idx > 0 {
|
|
return &SpiffeIDSigning{
|
|
ClusterID: input.Host[:idx],
|
|
Domain: input.Host[idx+1:],
|
|
}, nil
|
|
}
|
|
}
|
|
|
|
return nil, fmt.Errorf("SPIFFE ID is not in the expected format")
|
|
}
|