diff options
Diffstat (limited to 'guix')
| -rw-r--r-- | guix/scripts/authenticate.scm | 98 | ||||
| -rw-r--r-- | guix/store.scm | 79 |
2 files changed, 173 insertions, 4 deletions
diff --git a/guix/scripts/authenticate.scm b/guix/scripts/authenticate.scm new file mode 100644 index 0000000000..cbafed79d0 --- /dev/null +++ b/guix/scripts/authenticate.scm @@ -0,0 +1,98 @@ +;;; GNU Guix --- Functional package management for GNU +;;; Copyright © 2013 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/>. + +(define-module (guix scripts authenticate) + #:use-module (guix config) + #:use-module (guix utils) + #:use-module (guix pk-crypto) + #:use-module (guix ui) + #:use-module (rnrs io ports) + #:use-module (ice-9 match) + #:export (guix-authenticate)) + +;;; Commentary: +;;; +;;; This program is used internally by the daemon to sign exported archive +;;; (the 'export-paths' RPC), and to authenticate imported archives (the +;;; 'import-paths' RPC.) +;;; +;;; Code: + +(define (read-gcry-sexp file) + "Read a gcrypt sexp from FILE and return it." + (call-with-input-file file + (compose string->gcry-sexp get-string-all))) + +(define (read-hash-data file) + "Read sha256 hash data from FILE and return it as a gcrypt sexp." + (let* ((hex (call-with-input-file file get-string-all)) + (bv (base16-string->bytevector (string-trim-both hex)))) + (bytevector->hash-data bv))) + + +;;; +;;; Entry point with 'openssl'-compatible interface. We support this +;;; interface because that's what the daemon expects, and we want to leave it +;;; unmodified currently. +;;; + +(define (guix-authenticate . args) + (match args + (("rsautl" "-sign" "-inkey" key "-in" hash-file) + ;; Sign the hash in HASH-FILE with KEY, and return an sexp that includes + ;; both the hash and the actual signature. + (let* ((secret-key (read-gcry-sexp key)) + (data (read-hash-data hash-file))) + (format #t + "(guix-signature ~a (payload ~a))" + (gcry-sexp->string (sign data secret-key)) + (gcry-sexp->string data)) + #t)) + (("rsautl" "-verify" "-inkey" key "-pubin" "-in" signature-file) + ;; Read the signature as produced above, check it against KEY, and print + ;; the signed data to stdout upon success. + (let* ((public-key (read-gcry-sexp key)) + (sig+data (read-gcry-sexp signature-file)) + (data (find-sexp-token sig+data 'payload)) + (signature (find-sexp-token sig+data 'sig-val))) + (if (and data signature) + (if (verify signature data public-key) + (begin + (display (bytevector->base16-string + (hash-data->bytevector data))) + #t) ; success + (begin + (format (current-error-port) + "error: invalid signature: ~a~%" + (gcry-sexp->string signature)) + (exit 1))) + (begin + (format (current-error-port) + "error: corrupt signature data: ~a~%" + (gcry-sexp->string sig+data)) + (exit 1))))) + (("--help") + (display (_ "Usage: guix authenticate OPTION... +Sign or verify the signature on the given file. This tool is meant to +be used internally by 'guix-daemon'.\n"))) + (("--version") + (show-version-and-exit "guix authenticate")) + (else + (leave (_ "wrong arguments"))))) + +;;; authenticate.scm ends here diff --git a/guix/store.scm b/guix/store.scm index 08b0671b29..4ceca0daa2 100644 --- a/guix/store.scm +++ b/guix/store.scm @@ -80,6 +80,8 @@ dead-paths collect-garbage delete-paths + import-paths + export-paths current-build-output-port @@ -323,7 +325,30 @@ operate, should the disk become full. Return a server object." ;; The port where build output is sent. (make-parameter (current-error-port))) -(define (process-stderr server) +(define* (dump-port in out + #:optional len + #:key (buffer-size 16384)) + "Read LEN bytes from IN (or as much as possible if LEN is #f) and write it +to OUT, using chunks of BUFFER-SIZE bytes." + (define buffer + (make-bytevector buffer-size)) + + (let loop ((total 0) + (bytes (get-bytevector-n! in buffer 0 + (if len + (min len buffer-size) + buffer-size)))) + (or (eof-object? bytes) + (and len (= total len)) + (let ((total (+ total bytes))) + (put-bytevector out buffer 0 bytes) + (loop total + (get-bytevector-n! in buffer 0 + (if len + (min (- len total) buffer-size) + buffer-size))))))) + +(define* (process-stderr server #:optional user-port) "Read standard output and standard error from SERVER, writing it to CURRENT-BUILD-OUTPUT-PORT. Return #t when SERVER is done sending data, and #f otherwise; in the latter case, the caller should call `process-stderr' @@ -344,17 +369,30 @@ encoding conversion errors." (let ((k (read-int p))) (cond ((= k %stderr-write) - (read-latin1-string p) + ;; Write a byte stream to USER-PORT. + (let* ((len (read-int p)) + (m (modulo len 8))) + (dump-port p user-port len) + (unless (zero? m) + ;; Consume padding, as for strings. + (get-bytevector-n p (- 8 m)))) #f) ((= k %stderr-read) - (let ((len (read-int p))) - (read-latin1-string p) ; FIXME: what to do? + ;; Read a byte stream from USER-PORT. + (let* ((max-len (read-int p)) + (data (get-bytevector-n user-port max-len)) + (len (bytevector-length data))) + (write-int len p) + (put-bytevector p data) + (write-padding len p) #f)) ((= k %stderr-next) + ;; Log a string. (let ((s (read-latin1-string p))) (display s (current-build-output-port)) #f)) ((= k %stderr-error) + ;; Report an error. (let ((error (read-latin1-string p)) ;; Currently the daemon fails to send a status code for early ;; errors like DB schema version mismatches, so check for EOF. @@ -624,6 +662,39 @@ MIN-FREED bytes have been collected. Return the paths that were collected, and the number of bytes freed." (run-gc server (gc-action delete-specific) paths min-freed)) +(define (import-paths server port) + "Import the set of store paths read from PORT into SERVER's store. An error +is raised if the set of paths read from PORT is not signed (as per +'export-path #:sign? #t'.) Return the list of store paths imported." + (let ((s (nix-server-socket server))) + (write-int (operation-id import-paths) s) + (let loop ((done? (process-stderr server port))) + (or done? (loop (process-stderr server port)))) + (read-store-path-list s))) + +(define* (export-path server path port #:key (sign? #t)) + "Export PATH to PORT. When SIGN? is true, sign it." + (let ((s (nix-server-socket server))) + (write-int (operation-id export-path) s) + (write-store-path path s) + (write-arg boolean sign? s) + (let loop ((done? (process-stderr server port))) + (or done? (loop (process-stderr server port)))) + (= 1 (read-int s)))) + +(define* (export-paths server paths port #:key (sign? #t)) + "Export the store paths listed in PATHS to PORT, signing them if SIGN? +is true." + (let ((s (nix-server-socket server))) + (let loop ((paths paths)) + (match paths + (() + (write-int 0 port)) + ((head tail ...) + (write-int 1 port) + (and (export-path server head port #:sign? sign?) + (loop tail))))))) + ;;; ;;; Store paths. |