147 lines
3.2 KiB
Go
147 lines
3.2 KiB
Go
package gowebdav
|
|
|
|
import (
|
|
"crypto/md5"
|
|
"crypto/rand"
|
|
"encoding/hex"
|
|
"fmt"
|
|
"io"
|
|
"net/http"
|
|
"strings"
|
|
)
|
|
|
|
// DigestAuth structure holds our credentials
|
|
type DigestAuth struct {
|
|
user string
|
|
pw string
|
|
digestParts map[string]string
|
|
}
|
|
|
|
// Type identifies the DigestAuthenticator
|
|
func (d *DigestAuth) Type() string {
|
|
return "DigestAuth"
|
|
}
|
|
|
|
// User holds the DigestAuth username
|
|
func (d *DigestAuth) User() string {
|
|
return d.user
|
|
}
|
|
|
|
// Pass holds the DigestAuth password
|
|
func (d *DigestAuth) Pass() string {
|
|
return d.pw
|
|
}
|
|
|
|
// Authorize the current request
|
|
func (d *DigestAuth) Authorize(c *Client, method string, path string) {
|
|
d.digestParts["uri"] = path
|
|
d.digestParts["method"] = method
|
|
d.digestParts["username"] = d.user
|
|
d.digestParts["password"] = d.pw
|
|
c.headers.Set("Authorization", getDigestAuthorization(d.digestParts))
|
|
}
|
|
|
|
func digestParts(resp *http.Response) map[string]string {
|
|
result := map[string]string{}
|
|
if len(resp.Header["Www-Authenticate"]) > 0 {
|
|
wantedHeaders := []string{"nonce", "realm", "qop", "opaque", "algorithm", "entityBody"}
|
|
responseHeaders := strings.Split(resp.Header["Www-Authenticate"][0], ",")
|
|
for _, r := range responseHeaders {
|
|
for _, w := range wantedHeaders {
|
|
if strings.Contains(r, w) {
|
|
result[w] = strings.Trim(
|
|
strings.SplitN(r, `=`, 2)[1],
|
|
`"`,
|
|
)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return result
|
|
}
|
|
|
|
func getMD5(text string) string {
|
|
hasher := md5.New()
|
|
hasher.Write([]byte(text))
|
|
return hex.EncodeToString(hasher.Sum(nil))
|
|
}
|
|
|
|
func getCnonce() string {
|
|
b := make([]byte, 8)
|
|
io.ReadFull(rand.Reader, b)
|
|
return fmt.Sprintf("%x", b)[:16]
|
|
}
|
|
|
|
func getDigestAuthorization(digestParts map[string]string) string {
|
|
d := digestParts
|
|
// These are the correct ha1 and ha2 for qop=auth. We should probably check for other types of qop.
|
|
|
|
var (
|
|
ha1 string
|
|
ha2 string
|
|
nonceCount = 00000001
|
|
cnonce = getCnonce()
|
|
response string
|
|
)
|
|
|
|
// 'ha1' value depends on value of "algorithm" field
|
|
switch d["algorithm"] {
|
|
case "MD5", "":
|
|
ha1 = getMD5(d["username"] + ":" + d["realm"] + ":" + d["password"])
|
|
case "MD5-sess":
|
|
ha1 = getMD5(
|
|
fmt.Sprintf("%s:%v:%s",
|
|
getMD5(d["username"]+":"+d["realm"]+":"+d["password"]),
|
|
nonceCount,
|
|
cnonce,
|
|
),
|
|
)
|
|
}
|
|
|
|
// 'ha2' value depends on value of "qop" field
|
|
switch d["qop"] {
|
|
case "auth", "":
|
|
ha2 = getMD5(d["method"] + ":" + d["uri"])
|
|
case "auth-int":
|
|
if d["entityBody"] != "" {
|
|
ha2 = getMD5(d["method"] + ":" + d["uri"] + ":" + getMD5(d["entityBody"]))
|
|
}
|
|
}
|
|
|
|
// 'response' value depends on value of "qop" field
|
|
switch d["qop"] {
|
|
case "":
|
|
response = getMD5(
|
|
fmt.Sprintf("%s:%s:%s",
|
|
ha1,
|
|
d["nonce"],
|
|
ha2,
|
|
),
|
|
)
|
|
case "auth", "auth-int":
|
|
response = getMD5(
|
|
fmt.Sprintf("%s:%s:%v:%s:%s:%s",
|
|
ha1,
|
|
d["nonce"],
|
|
nonceCount,
|
|
cnonce,
|
|
d["qop"],
|
|
ha2,
|
|
),
|
|
)
|
|
}
|
|
|
|
authorization := fmt.Sprintf(`Digest username="%s", realm="%s", nonce="%s", uri="%s", nc=%v, cnonce="%s", response="%s"`,
|
|
d["username"], d["realm"], d["nonce"], d["uri"], nonceCount, cnonce, response)
|
|
|
|
if d["qop"] != "" {
|
|
authorization += fmt.Sprintf(`, qop=%s`, d["qop"])
|
|
}
|
|
|
|
if d["opaque"] != "" {
|
|
authorization += fmt.Sprintf(`, opaque="%s"`, d["opaque"])
|
|
}
|
|
|
|
return authorization
|
|
}
|