Move deps from _workspace/ to vendor/

godep restore
pushd $GOPATH/src/github.com/appc/spec
git co master
popd
go get go4.org/errorutil
rm -rf Godeps
godep save ./...
git add vendor
git add -f $(git ls-files --other vendor/)
git co -- Godeps/LICENSES Godeps/.license_file_state Godeps/OWNERS

vendor/github.com/abbot/go-http-auth/.gitignore

@@ -0,0 +1,5 @@
+*~
+*.a
+*.6
+*.out
+_testmain.go

vendor/github.com/abbot/go-http-auth/LICENSE

@@ -0,0 +1,178 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
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+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
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+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
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+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+

vendor/github.com/abbot/go-http-auth/Makefile

@@ -0,0 +1,12 @@
+include $(GOROOT)/src/Make.inc
+
+TARG=auth_digest
+GOFILES=\
+	auth.go\
+	digest.go\
+	basic.go\
+	misc.go\
+	md5crypt.go\
+	users.go\
+
+include $(GOROOT)/src/Make.pkg

vendor/github.com/abbot/go-http-auth/README.md

@@ -0,0 +1,70 @@
+HTTP Authentication implementation in Go
+========================================
+
+This is an implementation of HTTP Basic and HTTP Digest authentication
+in Go language. It is designed as a simple wrapper for
+http.RequestHandler functions.
+
+Features
+--------
+ 
+ * Supports HTTP Basic and HTTP Digest authentication.
+ * Supports htpasswd and htdigest formatted files.
+ * Automatic reloading of password files.
+ * Pluggable interface for user/password storage.
+ * Supports MD5 and SHA1 for Basic authentication password storage.
+ * Configurable Digest nonce cache size with expiration.
+ * Wrapper for legacy http handlers (http.HandlerFunc interface)
+ 
+Example usage
+-------------
+
+This is a complete working example for Basic auth:
+
+    package main
+
+    import (
+            auth "github.com/abbot/go-http-auth"
+            "fmt"
+            "net/http"
+    )
+
+    func Secret(user, realm string) string {
+            if user == "john" {
+                    // password is "hello"
+                    return "$1$dlPL2MqE$oQmn16q49SqdmhenQuNgs1"
+            }
+            return ""
+    }
+
+    func handle(w http.ResponseWriter, r *auth.AuthenticatedRequest) {
+            fmt.Fprintf(w, "<html><body><h1>Hello, %s!</h1></body></html>", r.Username)
+    }
+
+    func main() {
+            authenticator := auth.NewBasicAuthenticator("example.com", Secret)
+            http.HandleFunc("/", authenticator.Wrap(handle))
+            http.ListenAndServe(":8080", nil)
+    }
+
+See more examples in the "examples" directory.
+
+Legal
+-----
+
+This module is developed under Apache 2.0 license, and can be used for
+open and proprietary projects.
+
+Copyright 2012-2013 Lev Shamardin
+
+Licensed under the Apache License, Version 2.0 (the "License"); you
+may not use this file or any other part of this project except in
+compliance with the License. You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+implied. See the License for the specific language governing
+permissions and limitations under the License.

vendor/github.com/abbot/go-http-auth/auth.go

@@ -0,0 +1,48 @@
+package auth
+
+import "net/http"
+
+/* 
+ Request handlers must take AuthenticatedRequest instead of http.Request
+*/
+type AuthenticatedRequest struct {
+	http.Request
+	/* 
+	 Authenticated user name. Current API implies that Username is
+	 never empty, which means that authentication is always done
+	 before calling the request handler.
+	*/
+	Username string
+}
+
+/*
+ AuthenticatedHandlerFunc is like http.HandlerFunc, but takes
+ AuthenticatedRequest instead of http.Request
+*/
+type AuthenticatedHandlerFunc func(http.ResponseWriter, *AuthenticatedRequest)
+
+/*
+ Authenticator wraps an AuthenticatedHandlerFunc with
+ authentication-checking code.
+
+ Typical Authenticator usage is something like:
+
+   authenticator := SomeAuthenticator(...)
+   http.HandleFunc("/", authenticator(my_handler))
+
+ Authenticator wrapper checks the user authentication and calls the
+ wrapped function only after authentication has succeeded. Otherwise,
+ it returns a handler which initiates the authentication procedure.
+*/
+type Authenticator func(AuthenticatedHandlerFunc) http.HandlerFunc
+
+type AuthenticatorInterface interface {
+	Wrap(AuthenticatedHandlerFunc) http.HandlerFunc
+}
+
+func JustCheck(auth AuthenticatorInterface, wrapped http.HandlerFunc) http.HandlerFunc {
+	return auth.Wrap(func(w http.ResponseWriter, ar *AuthenticatedRequest) {
+		ar.Header.Set("X-Authenticated-Username", ar.Username)
+		wrapped(w, &ar.Request)
+	})
+}

vendor/github.com/abbot/go-http-auth/basic.go

@@ -0,0 +1,88 @@
+package auth
+
+import (
+	"crypto/sha1"
+	"encoding/base64"
+	"net/http"
+	"strings"
+)
+
+type BasicAuth struct {
+	Realm   string
+	Secrets SecretProvider
+}
+
+/*
+ Checks the username/password combination from the request. Returns
+ either an empty string (authentication failed) or the name of the
+ authenticated user.
+
+ Supports MD5 and SHA1 password entries
+*/
+func (a *BasicAuth) CheckAuth(r *http.Request) string {
+	s := strings.SplitN(r.Header.Get("Authorization"), " ", 2)
+	if len(s) != 2 || s[0] != "Basic" {
+		return ""
+	}
+
+	b, err := base64.StdEncoding.DecodeString(s[1])
+	if err != nil {
+		return ""
+	}
+	pair := strings.SplitN(string(b), ":", 2)
+	if len(pair) != 2 {
+		return ""
+	}
+	passwd := a.Secrets(pair[0], a.Realm)
+	if passwd == "" {
+		return ""
+	}
+	if strings.HasPrefix(passwd, "{SHA}") {
+		d := sha1.New()
+		d.Write([]byte(pair[1]))
+		if passwd[5:] != base64.StdEncoding.EncodeToString(d.Sum(nil)) {
+			return ""
+		}
+	} else {
+		e := NewMD5Entry(passwd)
+		if e == nil {
+			return ""
+		}
+		if passwd != string(MD5Crypt([]byte(pair[1]), e.Salt, e.Magic)) {
+			return ""
+		}
+	}
+	return pair[0]
+}
+
+/*
+ http.Handler for BasicAuth which initiates the authentication process
+ (or requires reauthentication).
+*/
+func (a *BasicAuth) RequireAuth(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("WWW-Authenticate", `Basic realm="`+a.Realm+`"`)
+	w.WriteHeader(401)
+	w.Write([]byte("401 Unauthorized\n"))
+}
+
+/*
+ BasicAuthenticator returns a function, which wraps an
+ AuthenticatedHandlerFunc converting it to http.HandlerFunc. This
+ wrapper function checks the authentication and either sends back
+ required authentication headers, or calls the wrapped function with
+ authenticated username in the AuthenticatedRequest.
+*/
+func (a *BasicAuth) Wrap(wrapped AuthenticatedHandlerFunc) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if username := a.CheckAuth(r); username == "" {
+			a.RequireAuth(w, r)
+		} else {
+			ar := &AuthenticatedRequest{Request: *r, Username: username}
+			wrapped(w, ar)
+		}
+	}
+}
+
+func NewBasicAuthenticator(realm string, secrets SecretProvider) *BasicAuth {
+	return &BasicAuth{Realm: realm, Secrets: secrets}
+}

vendor/github.com/abbot/go-http-auth/digest.go

@@ -0,0 +1,226 @@
+package auth
+
+import (
+	"fmt"
+	"net/http"
+	"net/url"
+	"sort"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+)
+
+type digest_client struct {
+	nc        uint64
+	last_seen int64
+}
+
+type DigestAuth struct {
+	Realm            string
+	Opaque           string
+	Secrets          SecretProvider
+	PlainTextSecrets bool
+
+	/* 
+	 Approximate size of Client's Cache. When actual number of
+	 tracked client nonces exceeds
+	 ClientCacheSize+ClientCacheTolerance, ClientCacheTolerance*2
+	 older entries are purged.
+	*/
+	ClientCacheSize      int
+	ClientCacheTolerance int
+
+	clients map[string]*digest_client
+	mutex   sync.Mutex
+}
+
+type digest_cache_entry struct {
+	nonce     string
+	last_seen int64
+}
+
+type digest_cache []digest_cache_entry
+
+func (c digest_cache) Less(i, j int) bool {
+	return c[i].last_seen < c[j].last_seen
+}
+
+func (c digest_cache) Len() int {
+	return len(c)
+}
+
+func (c digest_cache) Swap(i, j int) {
+	c[i], c[j] = c[j], c[i]
+}
+
+/*
+ Remove count oldest entries from DigestAuth.clients
+*/
+func (a *DigestAuth) Purge(count int) {
+	entries := make([]digest_cache_entry, 0, len(a.clients))
+	for nonce, client := range a.clients {
+		entries = append(entries, digest_cache_entry{nonce, client.last_seen})
+	}
+	cache := digest_cache(entries)
+	sort.Sort(cache)
+	for _, client := range cache[:count] {
+		delete(a.clients, client.nonce)
+	}
+}
+
+/*
+ http.Handler for DigestAuth which initiates the authentication process
+ (or requires reauthentication).
+*/
+func (a *DigestAuth) RequireAuth(w http.ResponseWriter, r *http.Request) {
+	if len(a.clients) > a.ClientCacheSize+a.ClientCacheTolerance {
+		a.Purge(a.ClientCacheTolerance * 2)
+	}
+	nonce := RandomKey()
+	a.clients[nonce] = &digest_client{nc: 0, last_seen: time.Now().UnixNano()}
+	w.Header().Set("WWW-Authenticate",
+		fmt.Sprintf(`Digest realm="%s", nonce="%s", opaque="%s", algorithm="MD5", qop="auth"`,
+			a.Realm, nonce, a.Opaque))
+	w.WriteHeader(401)
+	w.Write([]byte("401 Unauthorized\n"))
+}
+
+/*
+ Parse Authorization header from the http.Request. Returns a map of
+ auth parameters or nil if the header is not a valid parsable Digest
+ auth header.
+*/
+func DigestAuthParams(r *http.Request) map[string]string {
+	s := strings.SplitN(r.Header.Get("Authorization"), " ", 2)
+	if len(s) != 2 || s[0] != "Digest" {
+		return nil
+	}
+
+	result := map[string]string{}
+	for _, kv := range strings.Split(s[1], ",") {
+		parts := strings.SplitN(kv, "=", 2)
+		if len(parts) != 2 {
+			continue
+		}
+		result[strings.Trim(parts[0], "\" ")] = strings.Trim(parts[1], "\" ")
+	}
+	return result
+}
+
+/* 
+ Check if request contains valid authentication data. Returns a pair
+ of username, authinfo where username is the name of the authenticated
+ user or an empty string and authinfo is the contents for the optional
+ Authentication-Info response header.
+*/
+func (da *DigestAuth) CheckAuth(r *http.Request) (username string, authinfo *string) {
+	da.mutex.Lock()
+	defer da.mutex.Unlock()
+	username = ""
+	authinfo = nil
+	auth := DigestAuthParams(r)
+	if auth == nil || da.Opaque != auth["opaque"] || auth["algorithm"] != "MD5" || auth["qop"] != "auth" {
+		return
+	}
+
+	// Check if the requested URI matches auth header
+	switch u, err := url.Parse(auth["uri"]); {
+	case err != nil:
+		return
+	case r.URL == nil:
+		return
+	case len(u.Path) > len(r.URL.Path):
+		return
+	case !strings.HasPrefix(r.URL.Path, u.Path):
+		return
+	}
+
+	HA1 := da.Secrets(auth["username"], da.Realm)
+	if da.PlainTextSecrets {
+		HA1 = H(auth["username"] + ":" + da.Realm + ":" + HA1)
+	}
+	HA2 := H(r.Method + ":" + auth["uri"])
+	KD := H(strings.Join([]string{HA1, auth["nonce"], auth["nc"], auth["cnonce"], auth["qop"], HA2}, ":"))
+
+	if KD != auth["response"] {
+		return
+	}
+
+	// At this point crypto checks are completed and validated.
+	// Now check if the session is valid.
+
+	nc, err := strconv.ParseUint(auth["nc"], 16, 64)
+	if err != nil {
+		return
+	}
+
+	if client, ok := da.clients[auth["nonce"]]; !ok {
+		return
+	} else {
+		if client.nc != 0 && client.nc >= nc {
+			return
+		}
+		client.nc = nc
+		client.last_seen = time.Now().UnixNano()
+	}
+
+	resp_HA2 := H(":" + auth["uri"])
+	rspauth := H(strings.Join([]string{HA1, auth["nonce"], auth["nc"], auth["cnonce"], auth["qop"], resp_HA2}, ":"))
+
+	info := fmt.Sprintf(`qop="auth", rspauth="%s", cnonce="%s", nc="%s"`, rspauth, auth["cnonce"], auth["nc"])
+	return auth["username"], &info
+}
+
+/*
+ Default values for ClientCacheSize and ClientCacheTolerance for DigestAuth
+*/
+const DefaultClientCacheSize = 1000
+const DefaultClientCacheTolerance = 100
+
+/* 
+ Wrap returns an Authenticator which uses HTTP Digest
+ authentication. Arguments:
+
+ realm: The authentication realm.
+
+ secrets: SecretProvider which must return HA1 digests for the same
+ realm as above.
+*/
+func (a *DigestAuth) Wrap(wrapped AuthenticatedHandlerFunc) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if username, authinfo := a.CheckAuth(r); username == "" {
+			a.RequireAuth(w, r)
+		} else {
+			ar := &AuthenticatedRequest{Request: *r, Username: username}
+			if authinfo != nil {
+				w.Header().Set("Authentication-Info", *authinfo)
+			}
+			wrapped(w, ar)
+		}
+	}
+}
+
+/* 
+ JustCheck returns function which converts an http.HandlerFunc into a
+ http.HandlerFunc which requires authentication. Username is passed as
+ an extra X-Authenticated-Username header.
+*/
+func (a *DigestAuth) JustCheck(wrapped http.HandlerFunc) http.HandlerFunc {
+	return a.Wrap(func(w http.ResponseWriter, ar *AuthenticatedRequest) {
+		ar.Header.Set("X-Authenticated-Username", ar.Username)
+		wrapped(w, &ar.Request)
+	})
+}
+
+func NewDigestAuthenticator(realm string, secrets SecretProvider) *DigestAuth {
+	da := &DigestAuth{
+		Opaque:               RandomKey(),
+		Realm:                realm,
+		Secrets:              secrets,
+		PlainTextSecrets:     false,
+		ClientCacheSize:      DefaultClientCacheSize,
+		ClientCacheTolerance: DefaultClientCacheTolerance,
+		clients:              map[string]*digest_client{}}
+	return da
+}

vendor/github.com/abbot/go-http-auth/examples/basic.go

@@ -0,0 +1,35 @@
+// +build ignore
+
+/*
+ Example application using Basic auth
+
+ Build with:
+
+ go build basic.go
+*/
+
+package main
+
+import (
+	auth ".."
+	"fmt"
+	"net/http"
+)
+
+func Secret(user, realm string) string {
+	if user == "john" {
+		// password is "hello"
+		return "$1$dlPL2MqE$oQmn16q49SqdmhenQuNgs1"
+	}
+	return ""
+}
+
+func handle(w http.ResponseWriter, r *auth.AuthenticatedRequest) {
+	fmt.Fprintf(w, "<html><body><h1>Hello, %s!</h1></body></html>", r.Username)
+}
+
+func main() {
+	authenticator := auth.NewBasicAuthenticator("example.com", Secret)
+	http.HandleFunc("/", authenticator.Wrap(handle))
+	http.ListenAndServe(":8080", nil)
+}

vendor/github.com/abbot/go-http-auth/examples/digest.go

@@ -0,0 +1,35 @@
+// +build ignore
+
+/*
+ Example application using Digest auth
+
+ Build with:
+
+ go build digest.go
+*/
+
+package main
+
+import (
+	auth ".."
+	"fmt"
+	"net/http"
+)
+
+func Secret(user, realm string) string {
+	if user == "john" {
+		// password is "hello"
+		return "b98e16cbc3d01734b264adba7baa3bf9"
+	}
+	return ""
+}
+
+func handle(w http.ResponseWriter, r *auth.AuthenticatedRequest) {
+	fmt.Fprintf(w, "<html><body><h1>Hello, %s!</h1></body></html>", r.Username)
+}
+
+func main() {
+	authenticator := auth.NewDigestAuthenticator("example.com", Secret)
+	http.HandleFunc("/", authenticator.Wrap(handle))
+	http.ListenAndServe(":8080", nil)
+}

vendor/github.com/abbot/go-http-auth/examples/wrapped.go

@@ -0,0 +1,36 @@
+// +build ignore
+
+/*
+ Example demonstrating how to wrap an application which is unaware of
+ authenticated requests with a "pass-through" authentication
+
+ Build with:
+
+ go build wrapped.go
+*/
+
+package main
+
+import (
+	auth ".."
+	"fmt"
+	"net/http"
+)
+
+func Secret(user, realm string) string {
+	if user == "john" {
+		// password is "hello"
+		return "$1$dlPL2MqE$oQmn16q49SqdmhenQuNgs1"
+	}
+	return ""
+}
+
+func regular_handler(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprintf(w, "<html><body><h1>This application is unaware of authentication</h1></body></html>")
+}
+
+func main() {
+	authenticator := auth.NewBasicAuthenticator("example.com", Secret)
+	http.HandleFunc("/", auth.JustCheck(authenticator, regular_handler))
+	http.ListenAndServe(":8080", nil)
+}

vendor/github.com/abbot/go-http-auth/md5crypt.go

@@ -0,0 +1,92 @@
+package auth
+
+import "crypto/md5"
+import "strings"
+
+const itoa64 = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
+
+var md5_crypt_swaps = [16]int{12, 6, 0, 13, 7, 1, 14, 8, 2, 15, 9, 3, 5, 10, 4, 11}
+
+type MD5Entry struct {
+	Magic, Salt, Hash []byte
+}
+
+func NewMD5Entry(e string) *MD5Entry {
+	parts := strings.SplitN(e, "$", 4)
+	if len(parts) != 4 {
+		return nil
+	}
+	return &MD5Entry{
+		Magic: []byte("$" + parts[1] + "$"),
+		Salt:  []byte(parts[2]),
+		Hash:  []byte(parts[3]),
+	}
+}
+
+/*
+ MD5 password crypt implementation
+*/
+func MD5Crypt(password, salt, magic []byte) []byte {
+	d := md5.New()
+
+	d.Write(password)
+	d.Write(magic)
+	d.Write(salt)
+
+	d2 := md5.New()
+	d2.Write(password)
+	d2.Write(salt)
+	d2.Write(password)
+
+	for i, mixin := 0, d2.Sum(nil); i < len(password); i++ {
+		d.Write([]byte{mixin[i%16]})
+	}
+
+	for i := len(password); i != 0; i >>= 1 {
+		if i&1 == 0 {
+			d.Write([]byte{password[0]})
+		} else {
+			d.Write([]byte{0})
+		}
+	}
+
+	final := d.Sum(nil)
+
+	for i := 0; i < 1000; i++ {
+		d2 := md5.New()
+		if i&1 == 0 {
+			d2.Write(final)
+		} else {
+			d2.Write(password)
+		}
+
+		if i%3 != 0 {
+			d2.Write(salt)
+		}
+
+		if i%7 != 0 {
+			d2.Write(password)
+		}
+
+		if i&1 == 0 {
+			d2.Write(password)
+		} else {
+			d2.Write(final)
+		}
+		final = d2.Sum(nil)
+	}
+
+	result := make([]byte, 0, 22)
+	v := uint(0)
+	bits := uint(0)
+	for _, i := range md5_crypt_swaps {
+		v |= (uint(final[i]) << bits)
+		for bits = bits + 8; bits > 6; bits -= 6 {
+			result = append(result, itoa64[v&0x3f])
+			v >>= 6
+		}
+	}
+	result = append(result, itoa64[v&0x3f])
+
+	return append(append(append(magic, salt...), '$'), result...)
+}

vendor/github.com/abbot/go-http-auth/misc.go

@@ -0,0 +1,30 @@
+package auth
+
+import "encoding/base64"
+import "crypto/md5"
+import "crypto/rand"
+import "fmt"
+
+/*
+ Return a random 16-byte base64 alphabet string
+*/
+func RandomKey() string {
+	k := make([]byte, 12)
+	for bytes := 0; bytes < len(k); {
+		n, err := rand.Read(k[bytes:])
+		if err != nil {
+			panic("rand.Read() failed")
+		}
+		bytes += n
+	}
+	return base64.StdEncoding.EncodeToString(k)
+}
+
+/*
+ H function for MD5 algorithm (returns a lower-case hex MD5 digest)
+*/
+func H(data string) string {
+	digest := md5.New()
+	digest.Write([]byte(data))
+	return fmt.Sprintf("%x", digest.Sum(nil))
+}

vendor/github.com/abbot/go-http-auth/test.htdigest

@@ -0,0 +1 @@
+test:example.com:aa78524fceb0e50fd8ca96dd818b8cf9

vendor/github.com/abbot/go-http-auth/test.htpasswd

@@ -0,0 +1,2 @@
+test:{SHA}qvTGHdzF6KLavt4PO0gs2a6pQ00=
+test2:$apr1$a0j62R97$mYqFkloXH0/UOaUnAiV2b0

vendor/github.com/abbot/go-http-auth/users.go

@@ -0,0 +1,136 @@
+package auth
+
+import "encoding/csv"
+import "os"
+
+/* 
+ SecretProvider is used by authenticators. Takes user name and realm
+ as an argument, returns secret required for authentication (HA1 for
+ digest authentication, properly encrypted password for basic).
+*/
+type SecretProvider func(user, realm string) string
+
+/*
+ Common functions for file auto-reloading
+*/
+type File struct {
+	Path string
+	Info os.FileInfo
+	/* must be set in inherited types during initialization */
+	Reload func()
+}
+
+func (f *File) ReloadIfNeeded() {
+	info, err := os.Stat(f.Path)
+	if err != nil {
+		panic(err)
+	}
+	if f.Info == nil || f.Info.ModTime() != info.ModTime() {
+		f.Info = info
+		f.Reload()
+	}
+}
+
+/*
+ Structure used for htdigest file authentication. Users map realms to
+ maps of users to their HA1 digests.
+*/
+type HtdigestFile struct {
+	File
+	Users map[string]map[string]string
+}
+
+func reload_htdigest(hf *HtdigestFile) {
+	r, err := os.Open(hf.Path)
+	if err != nil {
+		panic(err)
+	}
+	csv_reader := csv.NewReader(r)
+	csv_reader.Comma = ':'
+	csv_reader.Comment = '#'
+	csv_reader.TrimLeadingSpace = true
+
+	records, err := csv_reader.ReadAll()
+	if err != nil {
+		panic(err)
+	}
+
+	hf.Users = make(map[string]map[string]string)
+	for _, record := range records {
+		_, exists := hf.Users[record[1]]
+		if !exists {
+			hf.Users[record[1]] = make(map[string]string)
+		}
+		hf.Users[record[1]][record[0]] = record[2]
+	}
+}
+
+/*
+ SecretProvider implementation based on htdigest-formated files. Will
+ reload htdigest file on changes. Will panic on syntax errors in
+ htdigest files.
+*/
+func HtdigestFileProvider(filename string) SecretProvider {
+	hf := &HtdigestFile{File: File{Path: filename}}
+	hf.Reload = func() { reload_htdigest(hf) }
+	return func(user, realm string) string {
+		hf.ReloadIfNeeded()
+		_, exists := hf.Users[realm]
+		if !exists {
+			return ""
+		}
+		digest, exists := hf.Users[realm][user]
+		if !exists {
+			return ""
+		}
+		return digest
+	}
+}
+
+/*
+ Structure used for htdigest file authentication. Users map users to
+ their salted encrypted password
+*/
+type HtpasswdFile struct {
+	File
+	Users map[string]string
+}
+
+func reload_htpasswd(h *HtpasswdFile) {
+	r, err := os.Open(h.Path)
+	if err != nil {
+		panic(err)
+	}
+	csv_reader := csv.NewReader(r)
+	csv_reader.Comma = ':'
+	csv_reader.Comment = '#'
+	csv_reader.TrimLeadingSpace = true
+
+	records, err := csv_reader.ReadAll()
+	if err != nil {
+		panic(err)
+	}
+
+	h.Users = make(map[string]string)
+	for _, record := range records {
+		h.Users[record[0]] = record[1]
+	}
+}
+
+/*
+ SecretProvider implementation based on htpasswd-formated files. Will
+ reload htpasswd file on changes. Will panic on syntax errors in
+ htpasswd files. Realm argument of the SecretProvider is ignored.
+*/
+func HtpasswdFileProvider(filename string) SecretProvider {
+	h := &HtpasswdFile{File: File{Path: filename}}
+	h.Reload = func() { reload_htpasswd(h) }
+	return func(user, realm string) string {
+		h.ReloadIfNeeded()
+		password, exists := h.Users[user]
+		if !exists {
+			return ""
+		}
+		return password
+	}
+}