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authorLudovic Courtès <ludo@gnu.org>2019-12-26 19:54:39 +0100
committerLudovic Courtès <ludo@gnu.org>2019-12-27 13:52:49 +0100
commit1e43ab2c032834e43a43eb4c27d6a50bf66b86ba (patch)
tree25769222cb7e7350d158aeab0793445975f81881 /build-aux
parent6ab59cfd27de92ee75244c0d7313ac5de0cfeea0 (diff)
Add 'build-aux/git-authenticate.scm'.
* build-aux/git-authenticate.scm: New file. * Makefile.am (EXTRA_DIST): Add it. (commit_v1_0_1): New variable. (authenticate): New target.
Diffstat (limited to 'build-aux')
-rw-r--r--build-aux/git-authenticate.scm350
1 files changed, 350 insertions, 0 deletions
diff --git a/build-aux/git-authenticate.scm b/build-aux/git-authenticate.scm
new file mode 100644
index 0000000000..dd7029d438
--- /dev/null
+++ b/build-aux/git-authenticate.scm
@@ -0,0 +1,350 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2019 Ludovic Courtès <ludo@gnu.org>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
+
+;;;
+;;; Authenticate a range of commits.
+;;;
+
+(use-modules (git)
+ (guix git)
+ (guix gnupg)
+ (guix utils)
+ (guix i18n)
+ (guix progress)
+ (srfi srfi-1)
+ (srfi srfi-11)
+ (srfi srfi-26)
+ (srfi srfi-34)
+ (srfi srfi-35)
+ (ice-9 match)
+ (ice-9 format))
+
+
+(define %committers
+ ;; List of committers. These are the user names found on
+ ;; <https://savannah.gnu.org/project/memberlist.php?group=guix> along with
+ ;; the fingerprint of the signing (sub)key.
+ ;;
+ ;; TODO: Replace this statically-defined list by an in-repo list.
+ '(("andreas"
+ "AD17 A21E F8AE D8F1 CC02 DBD9 F7D5 C9BF 765C 61E3")
+ ("ajgrf"
+ "2A39 3FFF 68F4 EF7A 3D29 12AF 6F51 20A0 22FB B2D5")
+ ("alexvong1995"
+ "306F CB8F 2C01 C25D 29D3 0556 61EF 502E F602 52F2")
+ ("alezost"
+ "4FB9 9F49 2B12 A365 7997 E664 8246 0C08 2A0E E98F")
+ ("ambrevar"
+ "50F3 3E2E 5B0C 3D90 0424 ABE8 9BDC F497 A4BB CC7F")
+ ("apteryx"
+ "27D5 86A4 F890 0854 329F F09F 1260 E464 82E6 3562")
+ ("arunisaac"
+ "7F73 0343 F2F0 9F3C 77BF 79D3 2E25 EE8B 6180 2BB3")
+ ("atheia"
+ "3B12 9196 AE30 0C3C 0E90 A26F A715 5567 3271 9948")
+ ("bavier"
+ ;; primary: "34FF 38BC D151 25A6 E340 A0B5 3453 2F9F AFCA 8B8E"
+ "A0C5 E352 2EF8 EF5C 64CD B7F0 FD73 CAC7 19D3 2566")
+ ("beffa"
+ "3774 8024 880F D3FF DCA2 C9AB 5893 6E0E 2F1B 5A4C")
+ ("benwoodcroft"
+ "BCF8 F737 2CED 080A 67EB 592D 2A6A D9F4 AAC2 0DF6")
+ ("biscuolo"
+ "45CC 63B8 5258 C9D5 5F34 B239 D37D 0EA7 CECC 3912")
+ ("boskovits"
+ "7988 3B9F 7D6A 4DBF 3719 0367 2506 A96C CF63 0B21")
+ ("brettgilio"
+ "DFC0 C7F7 9EE6 0CA7 AE55 5E19 6722 43C4 A03F 0EEE")
+ ("carl"
+ ;; primary: "0401 7A2A 6D9A 0CCD C81D 8EC2 96AB 007F 1A7E D999"
+ "09CD D25B 5244 A376 78F6 EEA8 0CC5 2153 1979 91A5")
+ ("cbaines"
+ "3E89 EEE7 458E 720D 9754 E0B2 5E28 A33B 0B84 F577")
+ ("civodul"
+ "3CE4 6455 8A84 FDC6 9DB4 0CFB 090B 1199 3D9A EBB5")
+ ("cwebber"
+ "510A 8628 E2A7 7678 8F8C 709C 4BC0 2592 5FF8 F4D3")
+ ("dannym"
+ ;; primary: "295A F991 6F46 F8A1 34B0 29DA 8086 3842 F0FE D83B"
+ "76CE C6B1 7274 B465 C02D B3D9 E71A 3554 2C30 BAA5")
+ ("davexunit"
+ "B3C0 DB4D AD73 BA5D 285E 19AE 5143 0234 CEFD 87C3")
+ ("davexunit (2nd)" ;FIXME: to be confirmed!
+ "8CCB A7F5 52B9 CBEA E1FB 2915 8328 C747 0FF1 D807")
+ ("dvc"
+ "6909 6DFD D702 8BED ACC5 884B C5E0 51C7 9C0B ECDB")
+ ("dvc (old)"
+ "5F43 B681 0437 2F4B A898 A64B 33B9 E9FD E28D 2C23")
+ ("efraim"
+ "A28B F40C 3E55 1372 662D 14F7 41AA E7DC CA3D 8351")
+ ("efraim (old)"
+ "9157 41FE B22F A4E3 3B6E 8F8D F4C1 D391 7EAC EE93")
+ ("hoebjo"
+ "2219 43F4 9E9F 276F 9499 3382 BF28 6CB6 593E 5FFD")
+ ("htgoebel"
+ "B943 509D 633E 80DD 27FC 4EED 634A 8DFF D3F6 31DF")
+ ("ipetkov"
+ "7440 26BA 7CA3 C668 E940 1D53 0B43 1E98 3705 6942")
+ ("iyzsong"
+ ;; primary: "66A5 6D9C 9A98 BE7F 719A B401 2652 5665 AE72 7D37"
+ "0325 78A6 8298 94E7 2AA2 66F5 D415 BF25 3B51 5976")
+
+ ;; https://lists.gnu.org/archive/html/guix-devel/2018-04/msg00229.html
+ ("janneke (old)"
+ "DB34 CB51 D25C 9408 156F CDD6 A12F 8797 8D70 1B99")
+ ("janneke"
+ "1A85 8392 E331 EAFD B8C2 7FFB F3C1 A0D9 C1D6 5273")
+
+ ("jlicht"
+ ;; primary: "1BA4 08C5 8BF2 0EA7 3179 635A 865D C0A3 DED9 B5D0"
+ "E31D 9DDE EBA5 4A14 8A20 4550 DA45 97F9 47B4 1025")
+ ("jmd"
+ "8797 A26D 0854 2EAB 0285 A290 8A67 719C 2DE8 27B3")
+ ("kkebreau"
+ "83B6 703A DCCA 3B69 4BCE 2DA6 E6A5 EE3C 1946 7A0D")
+ ("leungbk"
+ "45E5 75FA 53EA 8BD6 1BCE 0B4E 3ADC 75F0 13D6 78F9")
+ ("lfam"
+ ;; primary: "4F71 6F9A 8FA2 C80E F1B5 E1BA 5E35 F231 DE1A C5E0"
+ "B051 5948 F1E7 D3C1 B980 38A0 2646 FA30 BACA 7F08")
+ ("lsl88"
+ "2AE3 1395 932B E642 FC0E D99C 9BED 6EDA 32E5 B0BC")
+ ("marusich"
+ "CBF5 9755 CBE7 E7EF EF18 3FB1 DD40 9A15 D822 469D")
+ ("mbakke"
+ "BBB0 2DDF 2CEA F6A8 0D1D E643 A2A0 6DF2 A33A 54FA")
+ ("mhw"
+ "D919 0965 CE03 199E AF28 B3BE 7CEF 2984 7562 C516")
+ ("mothacehe"
+ "4008 6A7E 0252 9B60 31FB 8607 8354 7635 3176 9CA6")
+ ("mthl"
+ "F2A3 8D7E EB2B 6640 5761 070D 0ADE E100 9460 4D37")
+ ("nckx"
+ ;; primary: "F5BC 5534 C36F 0087 B39D 36EF 1C9D C4FE B9DB 7C4B"
+ "7E8F AED0 0944 78EF 72E6 4D16 D889 B0F0 18C5 493C")
+ ("nckx (2nd)"
+ ;; primary: "F5BC 5534 C36F 0087 B39D 36EF 1C9D C4FE B9DB 7C4B"
+ "F5DA 2032 4B87 3D0B 7A38 7672 0DB0 FF88 4F55 6D79")
+ ("ngz"
+ "ED0E F1C8 E126 BA83 1B48 5FE9 DA00 B4F0 48E9 2F2D")
+ ("pelzflorian"
+ "CEF4 CB91 4856 BA38 0A20 A7E2 3008 88CB 39C6 3817")
+ ("pgarlick"
+ ;; primary: "B68B DF22 73F9 DA0E 63C1 8A32 515B F416 9242 D600"
+ "C699 ED09 E51B CE89 FD1D A078 AAC7 E891 896B 568A")
+ ("phant0mas"
+ "3A86 380E 58A8 B942 8D39 60E1 327C 1EF3 8DF5 4C32")
+ ("reepca"
+ "74D6 A930 F44B 9B84 9EA5 5606 C166 AA49 5F7F 189C")
+ ("rekado"
+ "BCA6 89B6 3655 3801 C3C6 2150 197A 5888 235F ACAC")
+ ("rhelling"
+ "0154 E1B9 1CC9 D9EF 7764 8DE7 F3A7 27DB 44FC CA36")
+ ("roelj"
+ "17CB 2812 EB63 3DFF 2C7F 0452 C3EC 1DCA 8430 72E1")
+ ("roptat"
+ "B5FA E628 5B41 3728 B2A0 FAED 4311 1F45 2008 6A0C")
+ ("samplet"
+ ;; primary: "D6B0 C593 DA8C 5EDC A44C 7A58 C336 91F7 1188 B004"
+ "A02C 2D82 0EF4 B25B A6B5 1D90 2AC6 A5EC 1C35 7C59")
+ ("sleep_walker"
+ "77DD AD2D 97F5 31BB C0F3 C7FD DFB5 EB09 AA62 5423")
+ ("snape"
+ "F494 72F4 7A59 00D5 C235 F212 89F9 6D48 08F3 59C7")
+ ("snape"
+ "F494 72F4 7A59 00D5 C235 F212 89F9 6D48 08F3 59C7")
+ ("steap"
+ "4E26 CCE9 578E 0828 9855 BDD4 1C79 95D2 D5A3 8336")
+ ("taylanub"
+ "9ADE 9ECF 2B19 C180 9C99 5CEA A1F4 CFCC 5283 6BAC")
+
+ ;; https://lists.gnu.org/archive/html/guix-devel/2017-03/msg00826.html
+ ("thomasd"
+ "1DD1 681F E285 E07F 11DC 0C59 2E15 A6BC D77D 54FD")
+ ("thomasd (old)"
+ "A5C5 92EA 606E 7106 A6A3 BC08 98B2 1575 91E1 2B08")
+
+ ("toothbrush"
+ "D712 1D73 A40A 7264 9E43 ED7D F284 6B1A 0D32 C442")
+ ("vagrantc"
+ "6580 7361 3BFC C5C7 E2E4 5D45 DC51 8FC8 7F97 16AA")
+ ("wigust"
+ ;; primary: "C955 CC5D C048 7FB1 7966 40A9 199A F6A3 67E9 4ABB"
+ "7238 7123 8EAC EB63 4548 5857 167F 8EA5 001A FA9C")
+ ("wingo"
+ "FF47 8FB2 64DE 32EC 2967 25A3 DDC0 F535 8812 F8F2")))
+
+(define %authorized-signing-keys
+ ;; Fingerprint of authorized signing keys.
+ (map (match-lambda
+ ((name fingerprint)
+ (string-filter char-set:graphic fingerprint)))
+ %committers))
+
+(define %commits-with-bad-signature
+ ;; Commits with a known-bad signature.
+ '("6a34f4ccc8a5d4a48e25ad3c9c512f8634928b91")) ;2016-12-29
+
+(define %unsigned-commits
+ ;; Commits lacking a signature.
+ '())
+
+(define-syntax-rule (with-temporary-files file1 file2 exp ...)
+ (call-with-temporary-output-file
+ (lambda (file1 port1)
+ (call-with-temporary-output-file
+ (lambda (file2 port2)
+ exp ...)))))
+
+(define (commit-signing-key repo commit-id)
+ "Return the OpenPGP key ID that signed COMMIT-ID (an OID). Raise an
+exception if the commit is unsigned or has an invalid signature."
+ (let-values (((signature signed-data)
+ (catch 'git-error
+ (lambda ()
+ (commit-extract-signature repo commit-id))
+ (lambda _
+ (values #f #f)))))
+ (if (not signature)
+ (raise (condition
+ (&message
+ (message (format #f (G_ "commit ~a lacks a signature")
+ commit-id)))))
+ (begin
+ (with-fluids ((%default-port-encoding "UTF-8"))
+ (with-temporary-files data-file signature-file
+ (call-with-output-file data-file
+ (cut display signed-data <>))
+ (call-with-output-file signature-file
+ (cut display signature <>))
+
+ (let-values (((status data)
+ (with-error-to-port (%make-void-port "w")
+ (lambda ()
+ (gnupg-verify* signature-file data-file
+ #:key-download 'always)))))
+ (match status
+ ('invalid-signature
+ ;; There's a signature but it's invalid.
+ (raise (condition
+ (&message
+ (message (format #f (G_ "signature verification failed \
+for commit ~a")
+ (oid->string commit-id)))))))
+ ('missing-key
+ (raise (condition
+ (&message
+ (message (format #f (G_ "could not authenticate \
+commit ~a: key ~a is missing")
+ (oid->string commit-id)
+ data))))))
+ ('valid-signature
+ (match data
+ ((fingerprint . user)
+ fingerprint)))))))))))
+
+(define (authenticate-commit repository commit)
+ "Authenticate COMMIT from REPOSITORY and return the signing key fingerprint.
+Raise an error when authentication fails."
+ (define id
+ (commit-id commit))
+
+ (define signing-key
+ (commit-signing-key repository id))
+
+ (unless (member signing-key %authorized-signing-keys)
+ (raise (condition
+ (&message
+ (message (format #f (G_ "commit ~a not signed by an authorized \
+key: ~a")
+ (oid->string id) signing-key))))))
+
+ signing-key)
+
+(define* (authenticate-commits repository commits
+ #:key (report-progress (const #t)))
+ "Authenticate COMMITS, a list of commit objects, calling REPORT-PROGRESS for
+each of them. Return an alist showing the number of occurrences of each key."
+ (parameterize ((current-keyring (string-append (config-directory)
+ "/keyrings/channels/guix.kbx")))
+ (fold (lambda (commit stats)
+ (report-progress)
+ (let ((signer (authenticate-commit repository commit)))
+ (match (assoc signer stats)
+ (#f (cons `(,signer . 1) stats))
+ ((_ . count) (cons `(,signer . ,(+ count 1))
+ (alist-delete signer stats))))))
+ '()
+ commits)))
+
+(define commit-short-id
+ (compose (cut string-take <> 7) oid->string commit-id))
+
+
+;;;
+;;; Entry point.
+;;;
+
+(define (git-authenticate args)
+ (define repository
+ (repository-open "."))
+
+ (let loop ((args args))
+ (match args
+ ((_ start end)
+ (define start-commit
+ (commit-lookup repository (string->oid start)))
+ (define end-commit
+ (commit-lookup repository (string->oid end)))
+
+ (define commits
+ (commit-difference end-commit start-commit))
+
+ (define reporter
+ (progress-reporter/bar (length commits)))
+
+ (format #t (G_ "Authenticating ~a to ~a (~a commits)...~%")
+ (commit-short-id start-commit)
+ (commit-short-id end-commit)
+ (length commits))
+
+ (let ((stats (call-with-progress-reporter reporter
+ (lambda (report)
+ (authenticate-commits repository commits
+ #:report-progress report)))))
+ (format #t (G_ "Signing statistics:~%"))
+ (for-each (match-lambda
+ ((signer . count)
+ (format #t " ~a ~10d~%" signer count)))
+ (sort stats
+ (match-lambda*
+ (((_ . count1) (_ . count2))
+ (> count1 count2)))))))
+ ((command start)
+ (let* ((head (repository-head repository))
+ (end (reference-target head)))
+ (loop (list command start (oid->string end)))))
+ (_
+ (format (current-error-port)
+ (G_ "Usage: git-authenticate START [END]
+
+Authenticate commits START to END or the current head.\n"))))))
+
+;;; Local Variables:
+;;; eval: (put 'with-temporary-files 'scheme-indent-function 2)
+;;; End: