lapo.it
JavaScript generic ASN.1 parser (mirror)
Keep examples in separate PEM encoded files (which allows for comments).
+75
-3
+29
examples/letsencrypt-x3.cer
+29
examples/letsencrypt-x3.cer
···
1
+
This is a real-world X.509 certificate, specifically a root CA.
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https://letsencrypt.org/certificates/
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-----BEGIN CERTIFICATE-----
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MIIEkjCCA3qgAwIBAgIQCgFBQgAAAVOFc2oLheynCDANBgkqhkiG9w0BAQsFADA/
5
+
MSQwIgYDVQQKExtEaWdpdGFsIFNpZ25hdHVyZSBUcnVzdCBDby4xFzAVBgNVBAMT
6
+
DkRTVCBSb290IENBIFgzMB4XDTE2MDMxNzE2NDA0NloXDTIxMDMxNzE2NDA0Nlow
7
+
SjELMAkGA1UEBhMCVVMxFjAUBgNVBAoTDUxldCdzIEVuY3J5cHQxIzAhBgNVBAMT
8
+
GkxldCdzIEVuY3J5cHQgQXV0aG9yaXR5IFgzMIIBIjANBgkqhkiG9w0BAQEFAAOC
9
+
AQ8AMIIBCgKCAQEAnNMM8FrlLke3cl03g7NoYzDq1zUmGSXhvb418XCSL7e4S0EF
10
+
q6meNQhY7LEqxGiHC6PjdeTm86dicbp5gWAf15Gan/PQeGdxyGkOlZHP/uaZ6WA8
11
+
SMx+yk13EiSdRxta67nsHjcAHJyse6cF6s5K671B5TaYucv9bTyWaN8jKkKQDIZ0
12
+
Z8h/pZq4UmEUEz9l6YKHy9v6Dlb2honzhT+Xhq+w3Brvaw2VFn3EK6BlspkENnWA
13
+
a6xK8xuQSXgvopZPKiAlKQTGdMDQMc2PMTiVFrqoM7hD8bEfwzB/onkxEz0tNvjj
14
+
/PIzark5McWvxI0NHWQWM6r6hCm21AvA2H3DkwIDAQABo4IBfTCCAXkwEgYDVR0T
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+
AQH/BAgwBgEB/wIBADAOBgNVHQ8BAf8EBAMCAYYwfwYIKwYBBQUHAQEEczBxMDIG
16
+
CCsGAQUFBzABhiZodHRwOi8vaXNyZy50cnVzdGlkLm9jc3AuaWRlbnRydXN0LmNv
17
+
bTA7BggrBgEFBQcwAoYvaHR0cDovL2FwcHMuaWRlbnRydXN0LmNvbS9yb290cy9k
18
+
c3Ryb290Y2F4My5wN2MwHwYDVR0jBBgwFoAUxKexpHsscfrb4UuQdf/EFWCFiRAw
19
+
VAYDVR0gBE0wSzAIBgZngQwBAgEwPwYLKwYBBAGC3xMBAQEwMDAuBggrBgEFBQcC
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+
ARYiaHR0cDovL2Nwcy5yb290LXgxLmxldHNlbmNyeXB0Lm9yZzA8BgNVHR8ENTAz
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+
MDGgL6AthitodHRwOi8vY3JsLmlkZW50cnVzdC5jb20vRFNUUk9PVENBWDNDUkwu
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+
Y3JsMB0GA1UdDgQWBBSoSmpjBH3duubRObemRWXv86jsoTANBgkqhkiG9w0BAQsF
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+
AAOCAQEA3TPXEfNjWDjdGBX7CVW+dla5cEilaUcne8IkCJLxWh9KEik3JHRRHGJo
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+
uM2VcGfl96S8TihRzZvoroed6ti6WqEBmtzw3Wodatg+VyOeph4EYpr/1wXKtx8/
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wApIvJSwtmVi4MFU5aMqrSDE6ea73Mj2tcMyo5jMd6jmeWUHK8so/joWUoHOUgwu
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+
X4Po1QYz+3dszkDqMp4fklxBwXRsW10KXzPMTZ+sOPAveyxindmjkW8lGy+QsRlG
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+
PfZ+G6Z6h7mjem0Y+iWlkYcV4PIWL1iwBi8saCbGS5jN2p8M+X+Q7UNKEkROb3N6
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KOqkqm57TH2H3eDJAkSnh6/DNFu0Qg==
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-----END CERTIFICATE-----
+22
examples/sig-rsa1024-sha1.p7s
+22
examples/sig-rsa1024-sha1.p7s
···
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This is a PKCS#7/CMS detached digital signature.
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It is an old example generated in 2008 and as such uses obsolete cryptography: RSA1024 with SHA1.
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-----BEGIN PKCS7-----
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MIIDUAYJKoZIhvcNAQcCoIIDQTCCAz0CAQExCzAJBgUrDgMCGgUAMAsGCSqGSIb3
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DQEHAaCCAfMwggHvMIIBWKADAgECAhAvoXazbunwSfREtACZZhlFMA0GCSqGSIb3
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DQEBBQUAMAwxCjAIBgNVBAMMAWEwHhcNMDgxMDE1MTUwMzQxWhcNMDkxMDE1MTUw
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MzQxWjAMMQowCAYDVQQDDAFhMIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCJ
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Uwlwhu5hR8X01f+vG0mKPRHsVRjpZNxSEmsmFPdDiD9kylE3ertTDf0gRkpIvWfN
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J+eymuxoXF0Qgl5gXAVuSrjupGD6J+VapixJiwLXJHokmDihLs3zfGARz08O3qnO
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+
5ofBy0pRxq5isu/bAAcjoByZ1sI/g0iAuotC1UFObwIDAQABo1IwUDAOBgNVHQ8B
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Af8EBAMCBPAwHQYDVR0OBBYEFEIGXQB4h+04Z3y/n7Nv94+CqPitMB8GA1UdIwQY
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MBaAFEIGXQB4h+04Z3y/n7Nv94+CqPitMA0GCSqGSIb3DQEBBQUAA4GBAE0G7tAi
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+
aacJxvP3fhEj+yP9VDxL0omrRRAEaMXwWaBf/Ggk1T/u+8/CDAdjuGNCiF6ctooK
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c8u8KpnZJsGqnpGQ4n6L2KjTtRUDh+hija0eJRBFdirPQe2HAebQGFnmOk6Mn7Ki
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QfBIsOzXim/bFqaBSbf06bLTQNwFouSO+jwOMYIBJTCCASECAQEwIDAMMQowCAYD
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VQQDDAFhAhAvoXazbunwSfREtACZZhlFMAkGBSsOAwIaBQCgXTAYBgkqhkiG9w0B
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CQMxCwYJKoZIhvcNAQcBMBwGCSqGSIb3DQEJBTEPFw0wODEwMTUxNTAzNDNaMCMG
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CSqGSIb3DQEJBDEWBBQAAAAAAAAAAAAAAAAAAAAAAAAAADANBgkqhkiG9w0BAQEF
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AASBgHQe0ocjBn+ZVXWbb8CpZ2CxzFKiVrgZxZO2kMBwJoNyZx+jnICHdhfsX4Or
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+
cF5vIYVAZIRz5RxqFmuZELTfZ/K89zaK873DP9V7/ftBGpezWEp9h29AtAzI9lzS
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GB9gugiyB5JstXoM1L87KJmT05MeZxg1pvvFhwo1m/QOpcqz
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-----END PKCS7-----
+8
-1
index.html
+8
-1
index.html
···
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<label title="can be slow with big files"><input type="checkbox" id="wantHex" checked="checked"> with hex dump</label>
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<input id="butDecode" type="button" value="decode">
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<input id="butClear" type="button" value="clear">
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-
<input id="butExample" type="button" value="example">
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<input type="file" id="file">
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<div>
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Examples:
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<select id="examples">
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<option value="sig-rsa1024-sha1.p7s">PKCS#7/CMS signature (old)</option>
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<option value="letsencrypt-x3.cer">X.509 certificate: Let's Encrypt X3</option>
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</select>
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<input id="butExample" type="button" value="load example">
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</div>
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</form>
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<div id="help">
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<h2>Instructions</h2>
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-2
index.js
+15
-2
index.js
···
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wantHex = id('wantHex'),
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area = id('area'),
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file = id('file'),
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examples = id('examples'),
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hash = null;
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require('dom'); // side effect: augment ASN1
···
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hash = window.location.hash = '';
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};
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id('butExample').onclick = function () {
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var demo = 'MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIAwggHvMIIBWKADAgECAhAvoXazbunwSfREtACZZhlFMA0GCSqGSIb3DQEBBQUAMAwxCjAIBgNVBAMMAWEwHhcNMDgxMDE1MTUwMzQxWhcNMDkxMDE1MTUwMzQxWjAMMQowCAYDVQQDDAFhMIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCJUwlwhu5hR8X01f-vG0mKPRHsVRjpZNxSEmsmFPdDiD9kylE3ertTDf0gRkpIvWfNJ-eymuxoXF0Qgl5gXAVuSrjupGD6J-VapixJiwLXJHokmDihLs3zfGARz08O3qnO5ofBy0pRxq5isu_bAAcjoByZ1sI_g0iAuotC1UFObwIDAQABo1IwUDAOBgNVHQ8BAf8EBAMCBPAwHQYDVR0OBBYEFEIGXQB4h-04Z3y_n7Nv94-CqPitMB8GA1UdIwQYMBaAFEIGXQB4h-04Z3y_n7Nv94-CqPitMA0GCSqGSIb3DQEBBQUAA4GBAE0G7tAiaacJxvP3fhEj-yP9VDxL0omrRRAEaMXwWaBf_Ggk1T_u-8_CDAdjuGNCiF6ctooKc8u8KpnZJsGqnpGQ4n6L2KjTtRUDh-hija0eJRBFdirPQe2HAebQGFnmOk6Mn7KiQfBIsOzXim_bFqaBSbf06bLTQNwFouSO-jwOAAAxggElMIIBIQIBATAgMAwxCjAIBgNVBAMMAWECEC-hdrNu6fBJ9ES0AJlmGUUwCQYFKw4DAhoFAKBdMBgGCSqGSIb3DQEJAzELBgkqhkiG9w0BBwEwHAYJKoZIhvcNAQkFMQ8XDTA4MTAxNTE1MDM0M1owIwYJKoZIhvcNAQkEMRYEFAAAAAAAAAAAAAAAAAAAAAAAAAAAMA0GCSqGSIb3DQEBAQUABIGAdB7ShyMGf5lVdZtvwKlnYLHMUqJWuBnFk7aQwHAmg3JnH6OcgId2F-xfg6twXm8hhUBkhHPlHGoWa5kQtN9n8rz3NorzvcM_1Xv9-0Eal7NYSn2Hb0C0DMj2XNIYH2C6CLIHkmy1egzUvzsomZPTkx5nGDWm-8WHCjWb9A6lyrMAAAAAAAA';
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-
decodeText(demo);
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console.log('Loading example:', examples.value);
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var request = new XMLHttpRequest();
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request.open('GET', 'examples/' + examples.value, true);
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request.onreadystatechange = function() {
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if (this.readyState !== 4)
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return;
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if (this.status >= 200 && this.status < 400) {
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area.value = this.responseText;
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decodeText(this.responseText);
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} else {
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console.log('Error loading example.');
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}
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};
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request.send();
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};
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// this is only used if window.FileReader
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function read(f) {