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| <meta http-equiv="Content-Type" content="application/xhtml+xml; charset=UTF-8" /> | |
| <meta name="generator" content="AsciiDoc 8.6.10" /> | |
| <title>Git signature format</title> | |
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| /* | |
| * xhtml11 specific | |
| * | |
| * */ | |
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| /* | |
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| * | |
| * */ | |
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| /* | |
| * manpage specific | |
| * | |
| * */ | |
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| <script type="text/javascript"> | |
| /*<+'])'); | |
| // Function that scans the DOM tree for header elements (the DOM2 | |
| // nodeIterator API would be a better technique but not supported by all | |
| // browsers). | |
| var iterate = function (el) { | |
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| iterate(el); | |
| return result; | |
| } | |
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| return; | |
| } | |
| // Delete existing TOC entries in case we're reloading the TOC. | |
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| var i; | |
| for (i = 0; i < toc.childNodes.length; i++) { | |
| var entry = toc.childNodes[i]; | |
| if (entry.nodeName.toLowerCase() == 'div' | |
| && entry.getAttribute("class") | |
| && entry.getAttribute("class").match(/^toclevel/)) | |
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| } | |
| // Rebuild TOC entries. | |
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| var a = document.createElement("a"); | |
| a.href = "#" + entry.element.id; | |
| a.appendChild(document.createTextNode(entry.text)); | |
| var div = document.createElement("div"); | |
| div.appendChild(a); | |
| div.className = "toclevel" + entry.toclevel; | |
| toc.appendChild(div); | |
| } | |
| if (entries.length == 0) | |
| toc.parentNode.removeChild(toc); | |
| }, | |
| ///////////////////////////////////////////////////////////////////// | |
| // Footnotes generator | |
| ///////////////////////////////////////////////////////////////////// | |
| /* Based on footnote generation code from: | |
| * http://www.brandspankingnew.net/archive/2005/07/format_footnote.html | |
| */ | |
| footnotes: function () { | |
| // Delete existing footnote entries in case we're reloading the footnodes. | |
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| } | |
| var entriesToRemove = []; | |
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| } | |
| // Rebuild footnote entries. | |
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| var refs = {}; | |
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| n++; | |
| var note = spans[i].getAttribute("data-note"); | |
| if (!note) { | |
| // Use [\s\S] in place of . so multi-line matches work. | |
| // Because JavaScript has no s (dotall) regex flag. | |
| note = spans[i].innerHTML.match(/\s*\[([\s\S]*)]\s*/)[1]; | |
| spans[i].innerHTML = | |
| "[<a id='_footnoteref_" + n + "' href='#_footnote_" + n + | |
| "' title='View footnote' class='footnote'>" + n + "</a>]"; | |
| spans[i].setAttribute("data-note", note); | |
| } | |
| noteholder.innerHTML += | |
| "<div class='footnote' id='_footnote_" + n + "'>" + | |
| "<a href='#_footnoteref_" + n + "' title='Return to text'>" + | |
| n + "</a>. " + note + "</div>"; | |
| var id =spans[i].getAttribute("id"); | |
| if (id != null) refs["#"+id] = n; | |
| } | |
| } | |
| if (n == 0) | |
| noteholder.parentNode.removeChild(noteholder); | |
| else { | |
| // Process footnoterefs. | |
| for (i=0; i<spans.length; i++) { | |
| if (spans[i].className == "footnoteref") { | |
| var href = spans[i].getElementsByTagName("a")[0].getAttribute("href"); | |
| href = href.match(/#.*/)[0]; // Because IE return full URL. | |
| n = refs[href]; | |
| spans[i].innerHTML = | |
| "[<a href='#_footnote_" + n + | |
| "' title='View footnote' class='footnote'>" + n + "</a>]"; | |
| } | |
| } | |
| } | |
| }, | |
| install: function(toclevels) { | |
| var timerId; | |
| function reinstall() { | |
| asciidoc.footnotes(); | |
| if (toclevels) { | |
| asciidoc.toc(toclevels); | |
| } | |
| } | |
| function reinstallAndRemoveTimer() { | |
| clearInterval(timerId); | |
| reinstall(); | |
| } | |
| timerId = setInterval(reinstall, 500); | |
| if (document.addEventListener) | |
| document.addEventListener("DOMContentLoaded", reinstallAndRemoveTimer, false); | |
| else | |
| window.onload = reinstallAndRemoveTimer; | |
| } | |
| } | |
| asciidoc.install(); | |
| /*]]>*/ | |
| </script> | |
| </head> | |
| <body class="article"> | |
| <div id="header"> | |
| <h1>Git signature format</h1> | |
| </div> | |
| <div id="content"> | |
| <div class="sect1"> | |
| <h2 id="_overview">Overview</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>Git uses cryptographic signatures in various places, currently objects (tags, | |
| commits, mergetags) and transactions (pushes). In every case, the command which | |
| is about to create an object or transaction determines a payload from that, | |
| calls gpg to obtain a detached signature for the payload (<code>gpg -bsa</code>) and | |
| embeds the signature into the object or transaction.</p></div> | |
| <div class="paragraph"><p>Signatures always begin with <code>-----BEGIN PGP SIGNATURE-----</code> | |
| and end with <code>-----END PGP SIGNATURE-----</code>, unless gpg is told to | |
| produce RFC1991 signatures which use <code>MESSAGE</code> instead of <code>SIGNATURE</code>.</p></div> | |
| <div class="paragraph"><p>The signed payload and the way the signature is embedded depends | |
| on the type of the object resp. transaction.</p></div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_tag_signatures">Tag signatures</h2> | |
| <div class="sectionbody"> | |
| <div class="ulist"><ul> | |
| <li> | |
| <p> | |
| created by: <code>git tag -s</code> | |
| </p> | |
| </li> | |
| <li> | |
| <p> | |
| payload: annotated tag object | |
| </p> | |
| </li> | |
| <li> | |
| <p> | |
| embedding: append the signature to the unsigned tag object | |
| </p> | |
| </li> | |
| <li> | |
| <p> | |
| example: tag <code>signedtag</code> with subject <code>signed tag</code> | |
| </p> | |
| </li> | |
| </ul></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><code>object 04b871796dc0420f8e7561a895b52484b701d51a | |
| type commit | |
| tag signedtag | |
| tagger C O Mitter <committer@example.com> 1465981006 +0000 | |
| signed tag | |
| signed tag message body | |
| -----BEGIN PGP SIGNATURE----- | |
| Version: GnuPG v1 | |
| iQEcBAABAgAGBQJXYRhOAAoJEGEJLoW3InGJklkIAIcnhL7RwEb/+QeX9enkXhxn | |
| rxfdqrvWd1K80sl2TOt8Bg/NYwrUBw/RWJ+sg/hhHp4WtvE1HDGHlkEz3y11Lkuh | |
| 8tSxS3qKTxXUGozyPGuE90sJfExhZlW4knIQ1wt/yWqM+33E9pN4hzPqLwyrdods | |
| q8FWEqPPUbSJXoMbRPw04S5jrLtZSsUWbRYjmJCHzlhSfFWW4eFd37uquIaLUBS0 | |
| rkC3Jrx7420jkIpgFcTI2s60uhSQLzgcCwdA2ukSYIRnjg/zDkj8+3h/GaROJ72x | |
| lZyI6HWixKJkWw8lE9aAOD9TmTW9sFJwcVAzmAuFX2kUreDUKMZduGcoRYGpD7E= | |
| =jpXa | |
| -----END PGP SIGNATURE-----</code></pre> | |
| </div></div> | |
| <div class="ulist"><ul> | |
| <li> | |
| <p> | |
| verify with: <code>git verify-tag [-v]</code> or <code>git tag -v</code> | |
| </p> | |
| </li> | |
| </ul></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><code>gpg: Signature made Wed Jun 15 10:56:46 2016 CEST using RSA key ID B7227189 | |
| gpg: Good signature from "Eris Discordia <discord@example.net>" | |
| gpg: WARNING: This key is not certified with a trusted signature! | |
| gpg: There is no indication that the signature belongs to the owner. | |
| Primary key fingerprint: D4BE 2231 1AD3 131E 5EDA 29A4 6109 2E85 B722 7189 | |
| object 04b871796dc0420f8e7561a895b52484b701d51a | |
| type commit | |
| tag signedtag | |
| tagger C O Mitter <committer@example.com> 1465981006 +0000 | |
| signed tag | |
| signed tag message body</code></pre> | |
| </div></div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_commit_signatures">Commit signatures</h2> | |
| <div class="sectionbody"> | |
| <div class="ulist"><ul> | |
| <li> | |
| <p> | |
| created by: <code>git commit -S</code> | |
| </p> | |
| </li> | |
| <li> | |
| <p> | |
| payload: commit object | |
| </p> | |
| </li> | |
| <li> | |
| <p> | |
| embedding: header entry <code>gpgsig</code> | |
| (content is preceded by a space) | |
| </p> | |
| </li> | |
| <li> | |
| <p> | |
| example: commit with subject <code>signed commit</code> | |
| </p> | |
| </li> | |
| </ul></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><code>tree eebfed94e75e7760540d1485c740902590a00332 | |
| parent 04b871796dc0420f8e7561a895b52484b701d51a | |
| author A U Thor <author@example.com> 1465981137 +0000 | |
| committer C O Mitter <committer@example.com> 1465981137 +0000 | |
| gpgsig -----BEGIN PGP SIGNATURE----- | |
| Version: GnuPG v1 | |
| iQEcBAABAgAGBQJXYRjRAAoJEGEJLoW3InGJ3IwIAIY4SA6GxY3BjL60YyvsJPh/ | |
| HRCJwH+w7wt3Yc/9/bW2F+gF72kdHOOs2jfv+OZhq0q4OAN6fvVSczISY/82LpS7 | |
| DVdMQj2/YcHDT4xrDNBnXnviDO9G7am/9OE77kEbXrp7QPxvhjkicHNwy2rEflAA | |
| zn075rtEERDHr8nRYiDh8eVrefSO7D+bdQ7gv+7GsYMsd2auJWi1dHOSfTr9HIF4 | |
| HJhWXT9d2f8W+diRYXGh4X0wYiGg6na/soXc+vdtDYBzIxanRqjg8jCAeo1eOTk1 | |
| EdTwhcTZlI0x5pvJ3H0+4hA2jtldVtmPM4OTB0cTrEWBad7XV6YgiyuII73Ve3I= | |
| =jKHM | |
| -----END PGP SIGNATURE----- | |
| signed commit | |
| signed commit message body</code></pre> | |
| </div></div> | |
| <div class="ulist"><ul> | |
| <li> | |
| <p> | |
| verify with: <code>git verify-commit [-v]</code> (or <code>git show --show-signature</code>) | |
| </p> | |
| </li> | |
| </ul></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><code>gpg: Signature made Wed Jun 15 10:58:57 2016 CEST using RSA key ID B7227189 | |
| gpg: Good signature from "Eris Discordia <discord@example.net>" | |
| gpg: WARNING: This key is not certified with a trusted signature! | |
| gpg: There is no indication that the signature belongs to the owner. | |
| Primary key fingerprint: D4BE 2231 1AD3 131E 5EDA 29A4 6109 2E85 B722 7189 | |
| tree eebfed94e75e7760540d1485c740902590a00332 | |
| parent 04b871796dc0420f8e7561a895b52484b701d51a | |
| author A U Thor <author@example.com> 1465981137 +0000 | |
| committer C O Mitter <committer@example.com> 1465981137 +0000 | |
| signed commit | |
| signed commit message body</code></pre> | |
| </div></div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_mergetag_signatures">Mergetag signatures</h2> | |
| <div class="sectionbody"> | |
| <div class="ulist"><ul> | |
| <li> | |
| <p> | |
| created by: <code>git merge</code> on signed tag | |
| </p> | |
| </li> | |
| <li> | |
| <p> | |
| payload/embedding: the whole signed tag object is embedded into | |
| the (merge) commit object as header entry <code>mergetag</code> | |
| </p> | |
| </li> | |
| <li> | |
| <p> | |
| example: merge of the signed tag <code>signedtag</code> as above | |
| </p> | |
| </li> | |
| </ul></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><code>tree c7b1cff039a93f3600a1d18b82d26688668c7dea | |
| parent c33429be94b5f2d3ee9b0adad223f877f174b05d | |
| parent 04b871796dc0420f8e7561a895b52484b701d51a | |
| author A U Thor <author@example.com> 1465982009 +0000 | |
| committer C O Mitter <committer@example.com> 1465982009 +0000 | |
| mergetag object 04b871796dc0420f8e7561a895b52484b701d51a | |
| type commit | |
| tag signedtag | |
| tagger C O Mitter <committer@example.com> 1465981006 +0000 | |
| signed tag | |
| signed tag message body | |
| -----BEGIN PGP SIGNATURE----- | |
| Version: GnuPG v1 | |
| iQEcBAABAgAGBQJXYRhOAAoJEGEJLoW3InGJklkIAIcnhL7RwEb/+QeX9enkXhxn | |
| rxfdqrvWd1K80sl2TOt8Bg/NYwrUBw/RWJ+sg/hhHp4WtvE1HDGHlkEz3y11Lkuh | |
| 8tSxS3qKTxXUGozyPGuE90sJfExhZlW4knIQ1wt/yWqM+33E9pN4hzPqLwyrdods | |
| q8FWEqPPUbSJXoMbRPw04S5jrLtZSsUWbRYjmJCHzlhSfFWW4eFd37uquIaLUBS0 | |
| rkC3Jrx7420jkIpgFcTI2s60uhSQLzgcCwdA2ukSYIRnjg/zDkj8+3h/GaROJ72x | |
| lZyI6HWixKJkWw8lE9aAOD9TmTW9sFJwcVAzmAuFX2kUreDUKMZduGcoRYGpD7E= | |
| =jpXa | |
| -----END PGP SIGNATURE----- | |
| Merge tag 'signedtag' into downstream | |
| signed tag | |
| signed tag message body | |
| # gpg: Signature made Wed Jun 15 08:56:46 2016 UTC using RSA key ID B7227189 | |
| # gpg: Good signature from "Eris Discordia <discord@example.net>" | |
| # gpg: WARNING: This key is not certified with a trusted signature! | |
| # gpg: There is no indication that the signature belongs to the owner. | |
| # Primary key fingerprint: D4BE 2231 1AD3 131E 5EDA 29A4 6109 2E85 B722 7189</code></pre> | |
| </div></div> | |
| <div class="ulist"><ul> | |
| <li> | |
| <p> | |
| verify with: verification is embedded in merge commit message by default, | |
| alternatively with <code>git show --show-signature</code>: | |
| </p> | |
| </li> | |
| </ul></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><code>commit 9863f0c76ff78712b6800e199a46aa56afbcbd49 | |
| merged tag 'signedtag' | |
| gpg: Signature made Wed Jun 15 10:56:46 2016 CEST using RSA key ID B7227189 | |
| gpg: Good signature from "Eris Discordia <discord@example.net>" | |
| gpg: WARNING: This key is not certified with a trusted signature! | |
| gpg: There is no indication that the signature belongs to the owner. | |
| Primary key fingerprint: D4BE 2231 1AD3 131E 5EDA 29A4 6109 2E85 B722 7189 | |
| Merge: c33429b 04b8717 | |
| Author: A U Thor <author@example.com> | |
| Date: Wed Jun 15 09:13:29 2016 +0000 | |
| Merge tag 'signedtag' into downstream | |
| signed tag | |
| signed tag message body | |
| # gpg: Signature made Wed Jun 15 08:56:46 2016 UTC using RSA key ID B7227189 | |
| # gpg: Good signature from "Eris Discordia <discord@example.net>" | |
| # gpg: WARNING: This key is not certified with a trusted signature! | |
| # gpg: There is no indication that the signature belongs to the owner. | |
| # Primary key fingerprint: D4BE 2231 1AD3 131E 5EDA 29A4 6109 2E85 B722 7189</code></pre> | |
| </div></div> | |
| </div> | |
| </div> | |
| </div> | |
| <div id="footnotes"><hr /></div> | |
| <div id="footer"> | |
| <div id="footer-text"> | |
| Last updated | |
| 2018-01-26 15:11:04 PST | |
| </div> | |
| </div> | |
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