Fixes <https://bugs.gnu.org/47941>.
Reported by Jack Hill <jackhill@jackhill.us>.
* guix/cve.scm (reference-data->cve-references): Gracefully handle lack
of "reference_data".
(cpe-match->cve-configuration): Gracefully handle lack of "cpe23Uri".
This (notably) works around the fact that nvd.nist.gov is currently
inaccessible over IPv6.
* guix/cve.scm (fetch-vulnerabilities): Add #:timeout and pass it to
'http-fetch/cached'.
(current-vulnerabilities): Add #:timeout and pass it to
'fetch-vulnerabilities'.
* guix/lint.scm (current-vulnerabilities*): Pass #:timeout to
'current-vulnerabilities'.
The XML feed was discontinued on Oct. 16th, 2019:
<https://nvd.nist.gov/General/News/XML-Vulnerability-Feed-Retirement-Phase-3>
* guix/cve.scm (string->date*): New procedure.
(<cve-item>, <cve>, <cve-reference>): New record types.
(cpe-match->cve-configuration, configuration-data->cve-configurations)
(json->cve-items, version-matches?): New procedures.
(yearly-feed-uri): Change URL to refer to JSON feed.
(cpe->product-alist, %parse-vulnerability-feed)
(xml->vulnerabilities): Remove.
(cve-configuration->package-list, merge-package-lists)
(cve-item->vulnerability, json->vulnerabilities): New procedures.
(write-cache): Use 'json->vulnerabilities' instead of
'xml->vulnerabilities', and remove 'parameterize'.
(vulnerabilities->lookup-proc): Use 'version-matches?' when VERSION is
true.
* tests/cve.scm (%sample): Use 'tests/cve-sample.json'.
(%expected-vulnerabilities): Rewrite accordingly.
("json->cve-items", "cve-item-published-date")
("json->vulnerabilities"): New tests.
("xml->vulnerabilities"): Remove.
("vulnerabilities->lookup-proc"): Adjust to new vulnerabilities.
* tests/cve-sample.json: New file.
* tests/cve-sample.xml: Remove.
* Makefile.am (EXTRA_DIST): Adjust accordingly.
* doc/guix.texi (Invoking guix lint): Update nist.gov URLs.
That way CVE fetching benefits from 'If-Modified-Since' handling.
* guix/http-client.scm (http-fetch/cached): Add #:write-cache and
#:cache-miss parameters and honor them.
* guix/cve.scm (%current-year-ttl, %past-year-ttl): Reduce.
(call-with-cve-port): Remove.
(write-cache): New procedure.
(fetch-vulnerabilities): Rewrite in terms of 'http-fetch/cached'.
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 avoids ~20s of XML parsing when running 'guix lint -c cve'.
* guix/cve.scm (vulnerability->sexp, sexp->vulnerability)
(fetch-vulnerabilities): New procedures.
(current-vulnerabilities): Use 'fetch-vulnerabilities'.
The "Modified" database that we were reading is much smaller, but it
only shows CVEs modified over the past week.
* guix/cve.scm (%now, %current-year, %past-year): New variables.
(yearly-feed-uri): New procedure.
(%cve-feed-uri, %ttl): Remove.
(%current-year-ttl, %past-year-ttl): New variables.
(call-with-cve-port): Add 'uri' and 'ttl' parameters and honor them.
Add 'setvbuf' call.
(current-vulnerabilities)[read-vulnerabilities]: New procedure.
Read from both %LAST-YEAR and %CURRENT-YEAR.
