github.com/keybase/client/go@v0.0.0-20241007131713-f10651d043c8/externals/proof_service_facebook.go (about)

     1  // Copyright 2015 Keybase, Inc. All rights reserved. Use of
     2  // this source code is governed by the included BSD license.
     3  
     4  package externals
     5  
     6  import (
     7  	"regexp"
     8  	"strings"
     9  
    10  	libkb "github.com/keybase/client/go/libkb"
    11  	keybase1 "github.com/keybase/client/go/protocol/keybase1"
    12  	jsonw "github.com/keybase/go-jsonw"
    13  )
    14  
    15  // =============================================================================
    16  // Facebook
    17  //
    18  
    19  type FacebookChecker struct {
    20  	proof libkb.RemoteProofChainLink
    21  }
    22  
    23  var _ libkb.ProofChecker = (*FacebookChecker)(nil)
    24  
    25  func NewFacebookChecker(p libkb.RemoteProofChainLink) (*FacebookChecker, libkb.ProofError) {
    26  	return &FacebookChecker{p}, nil
    27  }
    28  
    29  func (rc *FacebookChecker) GetTorError() libkb.ProofError { return nil }
    30  
    31  func (rc *FacebookChecker) CheckStatus(mctx libkb.MetaContext, h libkb.SigHint, _ libkb.ProofCheckerMode,
    32  	pvlU keybase1.MerkleStoreEntry) (*libkb.SigHint, libkb.ProofError) {
    33  	// TODO CORE-8951 see if we can populate verifiedHint with anything useful.
    34  	return nil, CheckProofPvl(mctx, keybase1.ProofType_FACEBOOK, rc.proof, h, pvlU)
    35  }
    36  
    37  //
    38  // =============================================================================
    39  
    40  type FacebookServiceType struct{ libkb.BaseServiceType }
    41  
    42  func (t *FacebookServiceType) Key() string { return t.GetTypeName() }
    43  
    44  var facebookUsernameRegexp = regexp.MustCompile(`^(?i:[a-z0-9.]{1,50})$`)
    45  
    46  func (t *FacebookServiceType) NormalizeUsername(s string) (string, error) {
    47  	if !facebookUsernameRegexp.MatchString(s) {
    48  		return "", libkb.NewBadUsernameError(s)
    49  	}
    50  	// Convert to lowercase. Don't strip out dots, because while Facebook makes
    51  	// them optional, there are still dots in a user's "canonical" account name.
    52  	return strings.ToLower(s), nil
    53  }
    54  
    55  func (t *FacebookServiceType) NormalizeRemoteName(mctx libkb.MetaContext, s string) (string, error) {
    56  	// Allow a leading '@'.
    57  	s = strings.TrimPrefix(s, "@")
    58  	return t.NormalizeUsername(s)
    59  }
    60  
    61  func (t *FacebookServiceType) GetPrompt() string {
    62  	return "Your username on Facebook"
    63  }
    64  
    65  func (t *FacebookServiceType) ToServiceJSON(un string) *jsonw.Wrapper {
    66  	return t.BaseToServiceJSON(t, un)
    67  }
    68  
    69  func (t *FacebookServiceType) PostInstructions(un string) *libkb.Markup {
    70  	return libkb.FmtMarkup(
    71  		`<p>Please follow this link and make a <strong>public</strong> Facebook post.</p>
    72  		 <p>The text can be whatever you want, but the post <strong>must be public</strong>.</p>`)
    73  }
    74  
    75  func (t *FacebookServiceType) DisplayName() string   { return "Facebook" }
    76  func (t *FacebookServiceType) GetTypeName() string   { return "facebook" }
    77  func (t *FacebookServiceType) PickerSubtext() string { return "facebook.com" }
    78  
    79  func (t *FacebookServiceType) RecheckProofPosting(tryNumber int, status keybase1.ProofStatus, _ string) (warning *libkb.Markup, err error) {
    80  	if status == keybase1.ProofStatus_PERMISSION_DENIED {
    81  		warning = libkb.FmtMarkup("Permission denied! We can't support <strong>private</strong> posts.")
    82  	} else {
    83  		warning, err = t.BaseRecheckProofPosting(tryNumber, status)
    84  	}
    85  	return
    86  }
    87  func (t *FacebookServiceType) GetProofType() string { return t.BaseGetProofType(t) }
    88  
    89  func (t *FacebookServiceType) CheckProofText(text string, id keybase1.SigID, sig string) error {
    90  	// The "proof" here is a Facebook link that the user clicks on to go
    91  	// through a post flow. The exact nature of the link tends to change (e.g.
    92  	// it used to not point to a login interstitial, but now it does), and
    93  	// users are going to need to eyeball the final post in their browsers
    94  	// anyway, so we don't check anything here.
    95  	return nil
    96  }
    97  
    98  func (t *FacebookServiceType) MakeProofChecker(l libkb.RemoteProofChainLink) libkb.ProofChecker {
    99  	return &FacebookChecker{l}
   100  }