WebGate

Check-in [1c90f0c41c]
Login
Home Timeline Branches Tags Tickets Wiki

Many hyperlinks are disabled.
Use anonymous login to enable hyperlinks.

Overview
Comment:Use TweetNaCl instead of Cryptlib for suspension encapsulation
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: 1c90f0c41c6623fe2801304079009524cdb3a422
User & Date: murphy 2015-05-04 09:22:50
Context
2015-05-04
10:39
Allow WebGate to work with the standard suspension egg check-in: d11a75d327 user: murphy tags: trunk
09:22
Use TweetNaCl instead of Cryptlib for suspension encapsulation check-in: 1c90f0c41c user: murphy tags: trunk
09:15
Moved suspension module into separate compilation unit, isolating disabled interrupts check-in: 72a7ba057e user: murphy tags: trunk
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to webgate-suspend.scm. 

25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94


;;; Support for suspended computations

(define current-suspension-key
  (make-parameter
   (sprintf
    "~a:~a:~a"
    (current-user-id) (current-group-id) (current-directory))))

(define (wrap-suspension sk)
  (let ((evp (create-envelope FORMAT-CRYPTLIB)))
    (dynamic-wind
	void
	(lambda ()
	  (attribute-set! evp OPTION-ENCR-ALGO ALGO-AES)
	  (attribute-set! evp OPTION-ENCR-HASH ALGO-SHA2)
	  (attribute-set! evp OPTION-ENCR-MAC ALGO-HMAC-SHA2)
	  (attribute-set! evp ENVINFO-INTEGRITY INTEGRITY-FULL)
	  (attribute-set!/string evp ENVINFO-PASSWORD (current-suspension-key))
	  (attribute-set! evp ENVINFO-DATASIZE (string-length sk))
	  (let ((port (open-output-object evp)))
	    (write-string sk #f port)
	    (close-output-port port))
	  (base64-encode (read-string #f (open-input-object evp #f #t)) #t))
	(lambda ()
	  (destroy-object evp)))))

(define crypt-condition?
  (condition-predicate 'crypt))

(define crypt-condition-code
  (condition-property-accessor 'crypt 'code #f))

(define (unwrap-suspension sk)
  (condition-case
   (let ((evp (create-envelope FORMAT-AUTO)))
     (dynamic-wind
	 void
	 (lambda ()
	   (with-exception-handler
	    (let ((abort (current-exception-handler)))
	      (lambda (exn)
		(if (and (crypt-condition? exn)
			 (eqv? (crypt-condition-code exn) ENVELOPE-RESOURCE))
		    (attribute-set!/string
		     evp ENVINFO-PASSWORD (current-suspension-key))
		    (abort exn))))
	    (lambda ()
	      (let ((port (open-output-object evp)))
		(write-string (base64-decode sk) #f port)
		(close-output-port port))
	      (and (eqv? (attribute evp ENVINFO-INTEGRITY) INTEGRITY-FULL)
		   (read-string #f (open-input-object evp #f #t))))))
	 (lambda ()
	   (destroy-object evp))))
    ((exn crypt) #f)
    ((exn syntax) #f)))

(define-resource (suspended "suspended" sk parameters)
  (cond
   ((unwrap-suspension sk)
    => (cut continuation-resume <> parameters))
   (else
    (make-error-response
     404 "The requested suspended resource was not found on the server."))))

(define (send/suspend proc)
  (continuation-suspend
   (lambda (sk)
     (proc (resource-uri suspended (wrap-suspension sk))))))








|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<














25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63


















64
65
66
67
68
69
70
71
72
73
74
75
76


;;; Support for suspended computations

(define current-suspension-key
  (make-parameter
   (sprintf
    "~a:~a:~a"
    (current-user-id) (current-group-id) (current-directory))
   (lambda (v)
     (cond
      ((blob? v)
       v)
      (else
       (let loop ([v (->string v)] [n 1000])
	 (if (positive? n)
	     (loop (hash v) (fx- n 1))
	     (string->blob (substring/shared v 0 symmetric-box-keybytes)))))))))

(define (suspension-nonce)
  (substring/shared
   (hash
    (let ((getenv (resource-context-getenv (current-resource-context))))
      (sprintf
       "~a:~a/~a:~a"
       (getenv "REMOTE_ADDR") (getenv "REMOTE_PORT")
       (current-seconds) (current-milliseconds))))
   0 symmetric-box-noncebytes))

(define (wrap-suspension sk)
  (let* ((n (suspension-nonce))
	 (c ((symmetric-box (current-suspension-key)) sk (blob->u8vector/shared (string->blob n)))))
    (base64-encode (string-append n c) #t)))

(define (unwrap-suspension sk)
  (and-let* ((sk (condition-case (base64-decode sk) ((exn syntax) #f)))
	     ((> (string-length sk) symmetric-box-noncebytes))
	     (n (substring/shared sk 0 symmetric-box-noncebytes))
	     (c (substring/shared sk symmetric-box-noncebytes)))
    ((symmetric-unbox (current-suspension-key)) c (blob->u8vector/shared (string->blob n)))))



















(define-resource (suspended "suspended" sk parameters)
  (cond
   ((unwrap-suspension sk)
    => (cut continuation-resume <> parameters))
   (else
    (make-error-response
     404 "The requested suspended resource was not found on the server."))))

(define (send/suspend proc)
  (continuation-suspend
   (lambda (sk)
     (proc (resource-uri suspended (wrap-suspension sk))))))

Changes to webgate.meta. 

1
2
3
4
5
6
7
8
9
10
11
12
13
14

;; -*- mode: Scheme; -*-
((category net)
 (license "BSD")
 (author "Thomas Chust")
 (synopsis "(S)CGI web application framework")
 (needs srfi-99 protobuf cryptlib)
 (files "webgate.scm"
	"at-expr.scm"
	"suspension.scm"
	"webgate-utils.scm"
	"webgate-core.scm"
	"webgate-suspend.scm"
	"webgate-cgi.scm"
	"webgate-scgi.scm"))






|









1
2
3
4
5
6
7
8
9
10
11
12
13
14

;; -*- mode: Scheme; -*-
((category net)
 (license "BSD")
 (author "Thomas Chust")
 (synopsis "(S)CGI web application framework")
 (needs srfi-99 protobuf tweetnacl)
 (files "webgate.scm"
	"at-expr.scm"
	"suspension.scm"
	"webgate-utils.scm"
	"webgate-core.scm"
	"webgate-suspend.scm"
	"webgate-cgi.scm"
	"webgate-scgi.scm"))

Changes to webgate.scm. 

22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
..
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86

;; ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
;; CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
;; SOFTWARE.

(require-library
 srfi-1 srfi-4 srfi-13 srfi-14 srfi-18 srfi-69 srfi-99
 data-structures ports extras lolevel irregex tcp posix
 suspension cryptlib)

(module webgate-utils
  (write-netstring read-netstring
   make-at-reader make-at-read-table use-at-read-table
   uri-encode uri-decode
   base64-encode base64-decode
   write-html)
................................................................................

(module webgate-suspend
  (current-suspension-key
   suspended
   send/suspend)
  (import
   scheme chicken
   srfi-1 srfi-18 srfi-69
   extras suspension cryptlib webgate-utils webgate-core
   (only posix current-user-id current-group-id current-directory))
  (include
   "webgate-suspend.scm"))

(module webgate-cgi
  (cgi-main-loop)
  (import








|







 







|
|








22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
..
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86

;; ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
;; CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
;; SOFTWARE.

(require-library
 srfi-1 srfi-4 srfi-13 srfi-14 srfi-18 srfi-69 srfi-99
 data-structures ports extras lolevel irregex tcp posix
 suspension tweetnacl)

(module webgate-utils
  (write-netstring read-netstring
   make-at-reader make-at-read-table use-at-read-table
   uri-encode uri-decode
   base64-encode base64-decode
   write-html)
................................................................................

(module webgate-suspend
  (current-suspension-key
   suspended
   send/suspend)
  (import
   scheme chicken
   srfi-1 srfi-4 srfi-13 srfi-18 srfi-69
   data-structures extras suspension tweetnacl webgate-utils webgate-core
   (only posix current-user-id current-group-id current-directory))
  (include
   "webgate-suspend.scm"))

(module webgate-cgi
  (cgi-main-loop)
  (import

This page was generated in about 0.011s by Fossil 2.10 [9d9ef82234] 2019-10-04 21:41:13