/
services.go
178 lines (150 loc) · 4.98 KB
/
services.go
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// Copyright 2015 Keybase, Inc. All rights reserved. Use of
// this source code is governed by the included BSD license.
package libkb
import (
"fmt"
"regexp"
"strings"
keybase1 "github.com/keybase/client/go/protocol/keybase1"
jsonw "github.com/keybase/go-jsonw"
)
//=============================================================================
func MakeProofChecker(c ExternalServicesCollector, l RemoteProofChainLink) (ProofChecker, ProofError) {
if c == nil {
return nil, NewProofError(keybase1.ProofStatus_UNKNOWN_TYPE,
"No proof services configured")
}
k := l.TableKey()
st := c.GetServiceType(k)
if st == nil {
return nil, NewProofError(keybase1.ProofStatus_UNKNOWN_TYPE,
"No proof service for type: %s", k)
}
pc := st.MakeProofChecker(l)
if pc == nil {
return nil, NewProofError(keybase1.ProofStatus_UNKNOWN_TYPE,
"No proof checker for type: %s", k)
}
return pc, nil
}
//=============================================================================
type BaseServiceType struct{}
func (t BaseServiceType) BaseCheckProofTextShort(text string, id keybase1.SigID, med bool) error {
blocks := FindBase64Snippets(text)
var target string
if med {
target = id.ToMediumID()
} else {
target = id.ToShortID()
}
for _, b := range blocks {
if len(b) < len(target) {
continue
}
if b != target {
return WrongSigError{b}
}
// found match:
return nil
}
return NotFoundError{"Couldn't find signature ID " + target + " in text"}
}
func (t BaseServiceType) BaseRecheckProofPosting(tryNumber int, status keybase1.ProofStatus) (warning *Markup, err error) {
warning = FmtMarkup("Couldn't find posted proof.")
return
}
func (t BaseServiceType) BaseToServiceJSON(st ServiceType, un string) *jsonw.Wrapper {
ret := jsonw.NewDictionary()
ret.SetKey("name", jsonw.NewString(st.GetTypeName()))
ret.SetKey("username", jsonw.NewString(un))
return ret
}
func (t BaseServiceType) BaseGetProofType(st ServiceType) string {
return "web_service_binding." + st.GetTypeName()
}
func (t BaseServiceType) BaseAllStringKeys(st ServiceType) []string {
return []string{st.GetTypeName()}
}
func (t BaseServiceType) LastWriterWins() bool { return true }
func (t BaseServiceType) PreProofCheck(MetaContext, string) (*Markup, error) { return nil, nil }
func (t BaseServiceType) PreProofWarning(remotename string) *Markup { return nil }
func (t BaseServiceType) FormatProofText(m MetaContext, ppr *PostProofRes,
kbUsername string, sigID keybase1.SigID) (string, error) {
return ppr.Text, nil
}
func (t BaseServiceType) BaseCheckProofTextFull(text string, id keybase1.SigID, sig string) (err error) {
blocks := FindBase64Blocks(text)
target := FindFirstBase64Block(sig)
if len(target) == 0 {
err = BadSigError{"Generated sig was invalid"}
return
}
found := false
for _, b := range blocks {
if len(b) < 80 {
continue
}
if b != target {
err = WrongSigError{b}
return
}
found = true
}
if !found {
err = NotFoundError{"Couldn't find signature ID " + target + " in text"}
}
return
}
var urlRxx = regexp.MustCompile(`https://(\S+)`)
func (t BaseServiceType) BaseCheckProofForURL(text string, id keybase1.SigID) (err error) {
target := id.ToMediumID()
urls := urlRxx.FindAllString(text, -1)
found := false
for _, u := range urls {
if strings.HasSuffix(u, target) {
found = true
}
}
if !found {
err = NotFoundError{"Didn't find a URL with suffix '" + target + "'"}
}
return
}
func (t BaseServiceType) GetAPIArgKey() string {
return "remote_username"
}
func (t BaseServiceType) IsDevelOnly() bool { return false }
//=============================================================================
type assertionContext struct {
esc ExternalServicesCollector
}
func MakeAssertionContext(s ExternalServicesCollector) AssertionContext {
return assertionContext{esc: s}
}
func (a assertionContext) NormalizeSocialName(service string, username string) (string, error) {
st := a.esc.GetServiceType(service)
if st == nil {
return "", fmt.Errorf("Unknown social network: %s", service)
}
return st.NormalizeUsername(username)
}
//=============================================================================
// NOTE the static methods should only be used in tests or as a basic sanity
// check for the syntactical correctness of an assertion. All other callers
// should use the non-static versions.
// This uses only the 'static' services which exclude any parameterized proofs.
type staticAssertionContext struct {
esc ExternalServicesCollector
}
func MakeStaticAssertionContext(s ExternalServicesCollector) AssertionContext {
return staticAssertionContext{esc: s}
}
func (a staticAssertionContext) NormalizeSocialName(service string, username string) (string, error) {
st := a.esc.GetServiceType(service)
if st == nil {
// If we don't know about this service, normalize by going to lowercase
return strings.ToLower(username), nil
}
return st.NormalizeUsername(username)
}
//=============================================================================