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cve: Use a more compact format for the list of package/versions.
On a warm cache, "guix lint -c cve vorbis-tools" goes down
from 6.5s to 2.4s.
* guix/cve.scm (cpe->package-name): Change to return two values instead
of a pair.
(cpe->product-alist): New procedure.
(%parse-vulnerability-feed): Use it instead of 'filter-map'.
(fetch-vulnerabilities): Bump sexp format version to 1.
(vulnerabilities->lookup-proc): Adjust accordingly. When #:version is
omitted, return a list of vulnerabilities instead of a list of
version/vulnerability pairs.
* tests/cve.scm (%expected-vulnerabilities)
("vulnerabilities->lookup-proc): Adjust accordingly.
This commit is contained in:
Ludovic Courtès
parent
494dc2fc62
commit
870bf71eb0
2 changed files with 62 additions and 34 deletions
79
guix/cve.scm
79
guix/cve.scm
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@ -24,6 +24,7 @@ (define-module (guix cve)
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#:use-module (web uri)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-9)
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#:use-module (srfi srfi-11)
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#:use-module (srfi srfi-19)
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#:use-module (srfi srfi-26)
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#:use-module (ice-9 match)
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@ -48,8 +49,8 @@ (define-module (guix cve)
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(define-record-type <vulnerability>
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(vulnerability id packages)
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vulnerability?
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(id vulnerability-id)
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(packages vulnerability-packages))
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(id vulnerability-id) ;string
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(packages vulnerability-packages)) ;((p1 v1 v2 v3) (p2 v1) ...)
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(define %now
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(current-date))
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@ -93,18 +94,45 @@ (define %cpe-package-rx
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(define (cpe->package-name cpe)
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"Converts the Common Platform Enumeration (CPE) string CPE to a package
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name, in a very naive way. Return #f if CPE does not look like an application
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CPE string."
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(and=> (regexp-exec %cpe-package-rx (string-trim-both cpe))
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name, in a very naive way. Return two values: the package name, and its
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version string. Return #f and #f if CPE does not look like an application CPE
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string."
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(cond ((regexp-exec %cpe-package-rx (string-trim-both cpe))
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=>
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(lambda (matches)
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(cons (match:substring matches 2)
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(string-append (match:substring matches 3)
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(match (match:substring matches 4)
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("" "")
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(patch-level
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;; Drop the colon from things like
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;; "cpe:/a:openbsd:openssh:6.8:p1".
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(string-drop patch-level 1))))))))
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(values (match:substring matches 2)
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(string-append (match:substring matches 3)
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(match (match:substring matches 4)
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("" "")
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(patch-level
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;; Drop the colon from things like
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;; "cpe:/a:openbsd:openssh:6.8:p1".
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(string-drop patch-level 1)))))))
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(else
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(values #f #f))))
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(define (cpe->product-alist products)
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"Given PRODUCTS, a list of CPE names, return the subset limited to the
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applications listed in PRODUCTS, with names converted to package names:
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(cpe->product-alist
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'(\"cpe:/a:gnu:libtasn1:4.7\" \"cpe:/a:gnu:libtasn1:4.6\" \"cpe:/a:gnu:cpio:2.11\"))
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=> ((\"libtasn1\" \"4.7\" \"4.6\") (\"cpio\" \"2.11\"))
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"
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(fold (lambda (product result)
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(let-values (((name version) (cpe->package-name product)))
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(if name
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(match result
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(((previous . versions) . tail)
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;; Attempt to coalesce NAME and PREVIOUS.
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(if (string=? name previous)
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(alist-cons name (cons version versions) tail)
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(alist-cons name (list version) result)))
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(()
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(alist-cons name (list version) result)))
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result)))
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'()
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(sort products string<?)))
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(define %parse-vulnerability-feed
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;; Parse the XML vulnerability feed from
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@ -132,12 +160,12 @@ (define %parse-vulnerability-feed
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;; Some entries have no vulnerable-software-list.
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rest)
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((products id . rest)
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(match (filter-map cpe->package-name products)
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(match (cpe->product-alist products)
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(()
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;; No application among PRODUCTS.
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rest)
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(packages
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(cons (vulnerability id (reverse packages))
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(cons (vulnerability id packages)
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rest))))))
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(x
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seed)))
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@ -190,7 +218,7 @@ (define (update-cache)
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(with-atomic-file-output cache
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(lambda (port)
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(write `(vulnerabilities
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0 ;format version
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1 ;format version
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,(map vulnerability->sexp vulns))
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port)))
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vulns))
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@ -206,7 +234,7 @@ (define (old? file)
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(if (old? cache)
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(update-cache)
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(match (call-with-input-file cache read)
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(('vulnerabilities 0 vulns)
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(('vulnerabilities 1 vulns)
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(map sexp->vulnerability vulns))
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(x
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(update-cache)))))
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@ -233,8 +261,8 @@ (define (current-vulnerabilities)
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(define (vulnerabilities->lookup-proc vulnerabilities)
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"Return a lookup procedure built from VULNERABILITIES that takes a package
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name and optionally a version number. When the version is omitted, the lookup
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procedure returns a list of version/vulnerability pairs; otherwise, it returns
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a list of vulnerabilities affection the given package version."
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procedure returns a list of vulnerabilities; otherwise, it returns a list of
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vulnerabilities affecting the given package version."
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(define table
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;; Map package names to lists of version/vulnerability pairs.
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(fold (lambda (vuln table)
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@ -242,8 +270,8 @@ (define table
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(($ <vulnerability> id packages)
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(fold (lambda (package table)
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(match package
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((name . version)
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(vhash-cons name (cons version vuln)
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((name . versions)
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(vhash-cons name (cons vuln versions)
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table))))
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table
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packages))))
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@ -254,11 +282,14 @@ (define table
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(vhash-fold* (if version
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(lambda (pair result)
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(match pair
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((v . vuln)
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(if (string=? v version)
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((vuln . versions)
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(if (member version versions)
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(cons vuln result)
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result))))
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cons)
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(lambda (pair result)
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(match pair
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((vuln . _)
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(cons vuln result)))))
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'()
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package table)))
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@ -1,5 +1,5 @@
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;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2015 Ludovic Courtès <ludo@gnu.org>
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;;; Copyright © 2015, 2016 Ludovic Courtès <ludo@gnu.org>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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@ -32,12 +32,10 @@ (define %expected-vulnerabilities
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(list
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;; CVE-2003-0001 has no "/a" in its product list so it is omitted.
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;; CVE-2004-0230 lists "tcp" as an application, but lacks a version number.
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(vulnerability "CVE-2008-2335" '(("phpvid" . "1.1") ("phpvid" . "1.2")))
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(vulnerability "CVE-2008-3522" '(("enterprise_virtualization" . "3.5")
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("jasper" . "1.900.1")))
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(vulnerability "CVE-2009-3301" '(("openoffice.org" . "2.1.0")
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("openoffice.org" . "2.3.0")
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("openoffice.org" . "2.2.1")))
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(vulnerability "CVE-2008-2335" '(("phpvid" "1.2" "1.1")))
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(vulnerability "CVE-2008-3522" '(("enterprise_virtualization" "3.5")
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("jasper" "1.900.1")))
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(vulnerability "CVE-2009-3301" '(("openoffice.org" "2.3.0" "2.2.1" "2.1.0")))
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;; CVE-2015-8330 has no software list.
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))
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@ -48,9 +46,8 @@ (define %expected-vulnerabilities
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%expected-vulnerabilities
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(call-with-input-file %sample xml->vulnerabilities))
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(test-equal ""
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(list `(("1.1" . ,(first %expected-vulnerabilities))
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("1.2" . ,(first %expected-vulnerabilities)))
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(test-equal "vulnerabilities->lookup-proc"
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(list (list (first %expected-vulnerabilities))
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'()
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'()
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(list (second %expected-vulnerabilities))
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