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forgejo/vendor/github.com/yohcop/openid-go/discover.go
2017-03-17 15:16:08 +01:00

57 lines
2.1 KiB
Go
Vendored

package openid
// 7.3.1. Discovered Information
// Upon successful completion of discovery, the Relying Party will
// have one or more sets of the following information (see the
// Terminology section for definitions). If more than one set of the
// following information has been discovered, the precedence rules
// defined in [XRI_Resolution_2.0] are to be applied.
// - OP Endpoint URL
// - Protocol Version
// If the end user did not enter an OP Identifier, the following
// information will also be present:
// - Claimed Identifier
// - OP-Local Identifier
// If the end user entered an OP Identifier, there is no Claimed
// Identifier. For the purposes of making OpenID Authentication
// requests, the value
// "http://specs.openid.net/auth/2.0/identifier_select" MUST be
// used as both the Claimed Identifier and the OP-Local Identifier
// when an OP Identifier is entered.
func Discover(id string) (opEndpoint, opLocalID, claimedID string, err error) {
return defaultInstance.Discover(id)
}
func (oid *OpenID) Discover(id string) (opEndpoint, opLocalID, claimedID string, err error) {
// From OpenID specs, 7.2: Normalization
if id, err = Normalize(id); err != nil {
return
}
// From OpenID specs, 7.3: Discovery.
// If the identifier is an XRI, [XRI_Resolution_2.0] will yield an
// XRDS document that contains the necessary information. It
// should also be noted that Relying Parties can take advantage of
// XRI Proxy Resolvers, such as the one provided by XDI.org at
// http://www.xri.net. This will remove the need for the RPs to
// perform XRI Resolution locally.
// XRI not supported.
// If it is a URL, the Yadis protocol [Yadis] SHALL be first
// attempted. If it succeeds, the result is again an XRDS
// document.
if opEndpoint, opLocalID, err = yadisDiscovery(id, oid.urlGetter); err != nil {
// If the Yadis protocol fails and no valid XRDS document is
// retrieved, or no Service Elements are found in the XRDS
// document, the URL is retrieved and HTML-Based discovery SHALL be
// attempted.
opEndpoint, opLocalID, claimedID, err = htmlDiscovery(id, oid.urlGetter)
}
if err != nil {
return "", "", "", err
}
return
}