Posts Tagged ‘f7’

Display Content of SSL certificate .pem file with openssl command

Thursday, October 11th, 2018

display-content-of-pem-der-and-scr-file-how-to-view-pem-file-linux

If you have generated a .pem formatted SSL certificate or you have multiple .pem SSL certificates and you're not sure which .pem file is generated for which domain / subdomain it is useful to Display content of SSL Certificate .PEM file with openssl command.

Viewing certificate's content is also very useful if you have hosted multiple websites hosted on a server and you want to check which of the SSLs assigned in the Virtualhosts has Expired (for example if you have domains that expire in short term period (365 days).


1. How to Display Content of SSL certificate .pem file?

 

root@pcfreak:~# openssl x509 -in cert.pem -text
Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number:
            04:d1:ad:55:91:f3:f9:ef:3e:53:ea:2c:3a:f4:5f:e6:ce:c1
    Signature Algorithm: sha256WithRSAEncryption
        Issuer: C = US, O = Let's Encrypt, CN = Let's Encrypt Authority X3
        Validity
            Not Before: Oct 10 17:49:34 2018 GMT
            Not After : Jan  8 17:49:34 2019 GMT
        Subject: CN = mail.pc-freak.net

        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
                Public-Key: (2048 bit)
                Modulus:
                    00:bb:b0:c9:1c:83:82:61:47:f9:c2:73:60:c0:48:
                    e6:0c:f2:a1:ff:db:ae:f1:84:17:14:5d:fc:a3:b2:
                    e4:00:3a:d1:85:42:90:da:41:a9:e9:a8:af:20:3d:
                    12:ef:8e:ca:61:a1:71:f2:cc:43:bf:40:0d:fa:08:
                    7d:d9:61:2b:ea:5d:30:e0:52:43:db:18:30:92:0c:
                    2c:ce:87:93:84:ea:91:61:b7:70:db:11:7c:b6:a4:
                    33:de:d8:3f:d6:61:47:42:f2:36:12:7f:3d:e3:f7:
                    5b:11:3e:1c:f0:af:96:cd:61:8a:1a:a0:f0:b5:23:
                    65:73:b6:b4:9c:19:a7:09:dd:43:96:37:ac:48:fc:
                    21:07:02:52:67:26:2c:81:24:f4:d7:10:e6:f4:12:
                    69:53:ef:91:2a:15:6a:21:06:22:ea:fe:31:38:82:
                    b4:5a:b5:9b:67:90:16:b8:31:e8:27:38:f2:41:b9:
                    19:02:8f:c7:6e:e1:2c:84:75:19:6d:bb:30:3b:d2:
                    02:f0:65:f1:76:82:15:9c:ce:31:3a:d4:7c:83:ca:
                    d1:f9:e1:b7:76:f6:78:93:47:d2:00:f9:63:aa:94:
                    41:d4:78:d0:ee:bc:e6:e9:14:14:e4:ae:54:31:88:
                    f8:58:8d:7b:3e:9f:87:5c:f2:04:e5:07:e0:4c:9a:
                    81:eb
                Exponent: 65537 (0x10001)
        X509v3 extensions:
            X509v3 Key Usage: critical
                Digital Signature, Key Encipherment
            X509v3 Extended Key Usage:
                TLS Web Server Authentication, TLS Web Client Authentication
            X509v3 Basic Constraints: critical
                CA:FALSE
            X509v3 Subject Key Identifier:
                DB:AB:81:E3:14:5F:6D:BE:B4:78:7B:5E:7D:FB:66:BF:56:37:C5:1D
            X509v3 Authority Key Identifier:
                keyid:A8:4A:6A:63:04:7D:DD:BA:E6:D1:39:B7:A6:45:65:EF:F3:A8:EC:A1

 

            Authority Information Access:
                OCSP – URI:http://ocsp.int-x3.letsencrypt.org
                CA Issuers – URI:http://cert.int-x3.letsencrypt.org/

            X509v3 Subject Alternative Name:
                DNS:mail.pc-freak.net
            X509v3 Certificate Policies:
                Policy: 2.23.140.1.2.1
                Policy: 1.3.6.1.4.1.44947.1.1.1
                  CPS: http://cps.letsencrypt.org
                  User Notice:
                    Explicit Text: This Certificate may only be relied upon by Relying Parties and only in accordance with the Certificate Policy found at https://letsencrypt.org/repository/

            CT Precertificate SCTs:
                Signed Certificate Timestamp:
                    Version   : v1 (0x0)
                    Log ID    : E2:69:4B:AE:26:E8:E9:40:09:E8:86:1B:B6:3B:83:D4:
                                3E:E7:FE:74:88:FB:A4:8F:28:93:01:9D:DD:F1:DB:FE
                    Timestamp : Oct 10 18:49:34.453 2018 GMT
                    Extensions: none
                    Signature : ecdsa-with-SHA256
                                30:46:02:21:00:D6:DE:47:AD:D2:32:BE:BE:DD:B3:EB:
                                EE:84:9E:02:8A:4F:33:E2:63:21:D5:F7:4D:47:82:92:
                                AB:B9:0A:49:62:02:21:00:E8:7D:17:81:32:E3:4F:CF:
                                2D:79:8C:97:46:E1:EF:5E:99:F4:8A:8B:B5:6D:23:5F:
                                05:84:E2:14:6A:56:8E:A0
                Signed Certificate Timestamp:
                    Version   : v1 (0x0)
                    Log ID    : 29:3C:51:96:54:C8:39:65:BA:AA:50:FC:58:07:D4:B7:
                                6F:BF:58:7A:29:72:DC:A4:C3:0C:F4:E5:45:47:F4:78
                    Timestamp : Oct 10 18:49:34.451 2018 GMT
                    Extensions: none
                    Signature : ecdsa-with-SHA256
                                30:44:02:20:6C:8E:E7:E2:70:AD:33:A6:5C:E0:89:84:
                                FB:0B:F6:E1:5C:05:06:0A:A8:DB:8B:1C:7A:D0:52:99:
                                5F:3F:A2:64:02:20:4B:CD:0B:E7:A0:27:04:31:19:18:
                                58:99:51:73:49:6B:77:25:A7:E7:5B:10:8C:BD:ED:54:
                                03:DD:40:E4:2D:31
    Signature Algorithm: sha256WithRSAEncryption
         9c:86:b3:34:64:af:ac:9d:c4:d3:a7:cc:fc:8a:32:18:75:95:
         95:47:9b:9c:3c:0e:3b:61:f9:88:61:38:1a:a6:92:69:3d:14:
         6a:53:13:14:65:e6:ca:fa:b9:8e:48:c9:d4:73:f6:e4:74:8a:
         1f:2b:f2:14:86:f1:18:55:26:1b:a0:97:89:15:0b:62:c6:2b:
         27:81:6f:60:af:55:68:b3:2c:5b:10:56:a2:7d:28:cb:8e:fc:
         f0:21:65:78:9b:3a:52:d3:9d:27:ff:d7:24:95:de:0f:d8:3d:
         a2:43:6e:fc:a5:2d:f2:ad:37:e9:ea:db:b5:75:b8:7c:ad:23:
         45:1d:bd:fe:4e:36:c7:f4:e2:3d:47:c9:06:fc:cb:75:ba:d4:
         0a:90:17:ea:e1:7f:49:e6:68:27:97:8a:70:c7:50:e9:19:4a:
         8a:21:18:26:79:a3:61:ff:1b:26:9e:fe:85:8f:20:ed:c6:4d:
         c1:0e:04:21:a8:05:d4:29:69:99:53:63:81:c7:d5:58:71:df:
         02:b5:94:c9:36:48:c9:35:80:ab:71:78:d9:12:f6:f5:10:25:
         3d:38:c5:40:75:25:b1:95:18:d8:1c:96:f1:c6:1a:d2:c4:99:
         f5:01:2e:f4:e1:4a:1f:10:42:0e:34:ed:92:8e:53:9f:c2:7b:
         11:51:78:6a
—–BEGIN CERTIFICATE—–
MIIGDTCCBPWgAwIBAgISBNGtVZHz+e8+U+osOvRf5s7BMA0GCSqGSIb3DQEBCwUA
MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xODEwMTAxNzQ5MzRaFw0x
OTAxMDgxNzQ5MzRaMBwxGjAYBgNVBAMTEW1haWwucGMtZnJlYWsubmV0MIIBIjAN
BgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAu7DJHIOCYUf5wnNgwEjmDPKh/9uu
8YQXFF38o7LkADrRhUKQ2kGp6aivID0S747KYaFx8sxDv0AN+gh92WEr6l0w4FJD
2xgwkgwszoeThOqRYbdw2xF8tqQz3tg/1mFHQvI2En894/dbET4c8K+WzWGKGqDw
tSNlc7a0nBmnCd1DljesSPwhBwJSZyYsgST01xDm9BJpU++RKhVqIQYi6v4xOIK0
WrWbZ5AWuDHoJzjyQbkZAo/HbuEshHUZbbswO9IC8GXxdoIVnM4xOtR8g8rR+eG3
dvZ4k0fSAPljqpRB1HjQ7rzm6RQU5K5UMYj4WI17Pp+HXPIE5QfgTJqB6wIDAQAB
o4IDGTCCAxUwDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggr
BgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBTbq4HjFF9tvrR4e159+2a/
VjfFHTAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv86jsoTBvBggrBgEFBQcB
AQRjMGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmludC14My5sZXRzZW5jcnlw
dC5vcmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14My5sZXRzZW5jcnlw
dC5vcmcvMBwGA1UdEQQVMBOCEW1haWwucGMtZnJlYWsubmV0MIH+BgNVHSAEgfYw
gfMwCAYGZ4EMAQIBMIHmBgsrBgEEAYLfEwEBATCB1jAmBggrBgEFBQcCARYaaHR0
cDovL2Nwcy5sZXRzZW5jcnlwdC5vcmcwgasGCCsGAQUFBwICMIGeDIGbVGhpcyBD
ZXJ0aWZpY2F0ZSBtYXkgb25seSBiZSByZWxpZWQgdXBvbiBieSBSZWx5aW5nIFBh
cnRpZXMgYW5kIG9ubHkgaW4gYWNjb3JkYW5jZSB3aXRoIHRoZSBDZXJ0aWZpY2F0
ZSBQb2xpY3kgZm91bmQgYXQgaHR0cHM6Ly9sZXRzZW5jcnlwdC5vcmcvcmVwb3Np
dG9yeS8wggEEBgorBgEEAdZ5AgQCBIH1BIHyAPAAdwDiaUuuJujpQAnohhu2O4PU
Puf+dIj7pI8okwGd3fHb/gAAAWZfUA/1AAAEAwBIMEYCIQDW3ket0jK+vt2z6+6E
ngKKTzPiYyHV901HgpKruQpJYgIhAOh9F4Ey40/PLXmMl0bh716Z9IqLtW0jXwWE
4hRqVo6gAHUAKTxRllTIOWW6qlD8WAfUt2+/WHopctykwwz05UVH9HgAAAFmX1AP
8wAABAMARjBEAiBsjuficK0zplzgiYT7C/bhXAUGCqjbixx60FKZXz+iZAIgS80L
56AnBDEZGFiZUXNJa3clp+dbEIy97VQD3UDkLTEwDQYJKoZIhvcNAQELBQADggEB
AJyGszRkr6ydxNOnzPyKMhh1lZVHm5w8Djth+YhhOBqmkmk9FGpTExRl5sr6uY5I
ydRz9uR0ih8r8hSG8RhVJhugl4kVC2LGKyeBb2CvVWizLFsQVqJ9KMuO/PAhZXib
OlLTnSf/1ySV3g/YPaJDbvylLfKtN+nq27V1uHytI0Udvf5ONsf04j1HyQb8y3W6
1AqQF+rhf0nmaCeXinDHUOkZSoohGCZ5o2H/Gyae/oWPIO3GTcEOBCGoBdQpaZlT
Y4HH1Vhx3wK1lMk2SMk1gKtxeNkS9vUQJT04xUB1JbGVGNgclvHGGtLEmfUBLvTh
Sh8QQg407ZKOU5/CexFReGo=
—–END CERTIFICATE—–

 

Same way a .der files content / encryption algorithm and domain name could be grasped.
 

root@pcfreak:~# openssl x509 -in cert.der -inform der -text
Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number:
            ad:c2:96:6f:4b:db:31:5c
    Signature Algorithm: sha256WithRSAEncryption
        Issuer: CN = example.com
        Validity
            Not Before: Jun 22 04:00:37 2015 GMT
            Not After : Jul 22 04:00:37 2015 GMT

        Subject: CN = example.com
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
                Public-Key: (512 bit)

                Modulus:
                    00:ac:75:73:b4:51:ed:1f:dd:ae:70:52:43:fc:df:
                    c7:5b:d0:2c:75:1b:14:b8:75:01:04:10:e5:1f:03:
                    65:45:dd:df:a7:9f:34:ae:fd:be:e9:05:84:df:47:
                    16:81:d9:89:4b:ce:8e:6d:1c:fa:95:44:e8:af:84:
                    74:4f:ed:c2:e5
                Exponent: 65537 (0x10001)
        X509v3 extensions:
            X509v3 Subject Key Identifier:
                26:CF:C8:ED:4B:D7:94:B2:E4:25:03:58:24:8F:04:C0:74:D5:97:8A
            X509v3 Authority Key Identifier:
                keyid:26:CF:C8:ED:4B:D7:94:B2:E4:25:03:58:24:8F:04:C0:74:D5:97:8A

 

            X509v3 Basic Constraints:
                CA:TRUE
    Signature Algorithm: sha256WithRSAEncryption
         0c:8b:ff:12:80:9e:4c:90:bc:26:b0:96:20:ab:76:0c:64:71:
         d2:15:48:a5:33:f6:47:e4:03:df:76:5e:0f:cd:e1:1b:5e:d1:
         4d:c2:1f:8d:b8:63:2f:c9:7d:6e:5c:3b:cb:cd:a3:d0:d8:27:
         74:66:a3:76:06:a5:fb:81:3a:b6
—–BEGIN CERTIFICATE—–
MIIBdTCCAR+gAwIBAgIJAK3Clm9L2zFcMA0GCSqGSIb3DQEBCwUAMBYxFDASBgNV
BAMMC2V4YW1wbGUuY29tMB4XDTE1MDYyMjA0MDAzN1oXDTE1MDcyMjA0MDAzN1ow
FjEUMBIGA1UEAwwLZXhhbXBsZS5jb20wXDANBgkqhkiG9w0BAQEFAANLADBIAkEA
rHVztFHtH92ucFJD/N/HW9AsdRsUuHUBBBDlHwNlRd3fp580rv2+6QWE30cWgdmJ
S86ObRz6lUTor4R0T+3C5QIDAQABo1AwTjAdBgNVHQ4EFgQUJs/I7UvXlLLkJQNY
JI8EwHTVl4owHwYDVR0jBBgwFoAUJs/I7UvXlLLkJQNYJI8EwHTVl4owDAYDVR0T
BAUwAwEB/zANBgkqhkiG9w0BAQsFAANBAAyL/xKAnkyQvCawliCrdgxkcdIVSKUz
9kfkA992Xg/N4Rte0U3CH424Yy/JfW5cO8vNo9DYJ3Rmo3YGpfuBOrY=
—–END CERTIFICATE—–

 

2. How to display content and info about .CSR (Certificate Signing request)

 

root@pcfreak:~# openssl req -in cert.csr -noout -text
 

Certificate Request:
    Data:
        Version: 1 (0x0)
        Subject: C = BG, ST = BG, L = Dobrich, O = Pc Freak, CN = mail.pc-freak.net, emailAddress = hipo@pc-freak.net
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
                Public-Key: (2048 bit)
                Modulus:
                    00:b1:83:a7:07:62:19:d4:60:95:58:49:de:b3:48:
                    a8:39:31:fa:5a:bd:2b:d6:73:94:50:36:72:74:18:
                    58:b6:27:d3:0b:26:75:15:a8:ba:1b:77:a7:c9:54:
                    96:1f:c7:8d:da:bd:c9:17:91:53:85:9e:0a:f4:71:
                    3c:fb:d6:e4:75:41:c1:95:32:e1:22:fc:7b:1f:36:
                    23:12:00:ca:37:27:d5:f9:9b:29:48:4a:51:95:d1:
                    40:d0:ea:94:51:98:98:6b:d3:d9:79:1d:a1:65:bb:
                    a9:d1:ab:c9:46:6e:03:ee:24:45:e5:f2:73:e5:f4:
                    82:4a:08:57:b1:06:52:c3:cc:42:9a:02:5b:7a:7c:
                    bd:34:d5:5f:d7:ba:ef:27:d5:3d:97:16:69:06:c7:
                    c1:06:5e:d9:07:16:3f:a3:61:50:9d:dd:ea:95:32:
                    f1:ee:93:82:48:df:20:8b:ae:d2:95:89:05:e4:3d:
                    0c:d7:e1:cf:07:ae:55:84:11:06:92:be:34:b4:a2:
                    a1:ce:07:06:bf:21:bc:80:e2:03:d2:85:b4:64:02:
                    8d:cd:d2:86:1c:49:41:52:43:a8:12:f8:ef:2c:f4:
                    be:a0:dc:ac:ea:27:3a:f9:ab:ab:27:da:28:63:1d:
                    10:5a:4f:b8:51:42:40:ae:be:c0:2d:e9:a3:5a:5a:
                    23:7f
                Exponent: 65537 (0x10001)
        Attributes:
            a0:00
    Signature Algorithm: sha256WithRSAEncryption
         47:f0:54:cd:5e:46:6f:2c:cc:48:7e:85:f0:a8:96:10:ca:a3:
         15:98:77:d3:02:95:8c:67:84:e3:55:d2:0c:e8:d5:a7:ba:82:
         95:fb:ce:73:4c:bc:8f:da:85:97:0c:a8:59:32:b3:a4:af:0a:
         80:4c:78:7f:62:cd:1b:00:01:e8:51:27:9c:eb:75:29:80:e9:
         99:24:fc:86:e2:09:28:be:47:5a:1d:bf:b1:b4:c4:29:4e:6e:
         f3:70:b4:58:f8:d9:a6:63:03:8b:a1:ef:ee:6d:1a:35:33:1e:
         b2:32:25:c1:33:37:3d:46:82:37:9b:0d:4c:40:20:ae:ff:e0:
         cc:51:a2:6b:dd:74:26:d6:93:26:89:c7:76:29:13:cf:6e:5a:
         0f:7c:1b:f5:80:be:3b:6a:a3:c0:10:cd:07:1e:a2:31:8b:49:
         94:d7:63:cf:93:8d:80:03:75:4a:76:b4:cd:14:fe:96:62:61:
         6b:96:8f:c0:a5:ef:67:c7:5e:c0:a5:4b:4f:95:57:b6:43:03:
         8b:6d:10:5f:ab:f2:95:54:ba:85:8e:8b:c1:99:ea:fd:3f:5e:
         23:01:d4:27:f3:e9:20:37:c4:05:47:30:67:94:53:f0:87:27:
         48:73:57:55:f2:70:04:b1:e9:29:eb:2e:2c:9a:cc:55:f4:cc:
         a4:71:c2:5a


That's all folks 🙂

 

How to increase brightness on Fujitsu Siemens Amilo PI22515 notebook with Slackware Linux

Friday, March 9th, 2012

Increase LCD screen brightness on Fujitsu Siemens Amilo laptop with Linux Slackware

A friend of mine has Fujitsu Siemens Amilo laptop and is full time using his computer with Slackware Linux.

He is quite happy with Slackware Linux 13.37 on the laptop, but unfortunately sometimes his screen brightness lowers. One example when the screen gets darkened is when he switch the computer on without being plugged in the electricity grid. This lowered brightness makes the screen un-user friendly and is quite tiring for the eye …

By default the laptop has the usual function keys and in theory pressing Function (fn) + F8 / F7 – should increase / decrease the brightness with no problems, however on Slackware Linux (and probably on other Linuxes too?), the function keys are not properly recognized and not responding whilst pressed.
I used to have brigtness issues on my Lenovo notebook too and remember how irritating this was.
After a bit of recalling memories on how I solved this brightness issues I remembered the screen brigthness on Linux is tunable through /proc virtual (memory) filesystem.

The laptop (Amilo) Fujitsu Siemens video card is:

lspci |grep -i vga
00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) (rev 03)

I took a quick look in /proc and found few files called brightness:
 

  • /proc/acpi/video/GFX0/DD01/brightness
  • /proc/acpi/video/GFX0/DD02/brightness
  • /proc/acpi/video/GFX0/DD03/brightness
  • /proc/acpi/video/GFX0/DD04/brightness
  • /proc/acpi/video/GFX0/DD05/brightness

cat-ting /proc/acpi/video/GFX0/DD01/brightness, /proc/acpi/video/GFX0/DD03/brightness, /proc/acpi/video/GFX0/DD04/brightness all shows not supported and therefore, they cannot be used to modify brightness:

bash-4.1# for i in $(/proc/acpi/video/GFX0/DD0{1,3,4,5}/brightness); do \
cat $i;
done
<not supported>
<not supported>
<not supported>
<not supported>

After a bit of testing I finally succeeded in increasing the brightness.
Increasing the brightness on the notebook Intel GM965 video card model is done, through file:

/proc/acpi/video/GFX0/DD02/brightness

To see all the brightness levels the Fujitsu LCD display supports:

bash-4.1# cat /proc/acpi/video/GFX0/DD02/brightness
levels: 13 25 38 50 63 75 88 100
current: 25

As you can see the dark screen was caused cause the current: brightness is set to a low value of 25.
To light up the LCD screen and make the screen display fine again, I increased the brightness to the maximum level 100, e.g.:

bash-4.1# echo '100' > /proc/acpi/video/GFX0/DD02/brigthness

Just for the fun, I've written also a two lines script which gradually increases LCDs brightness 🙂

bash-4.1# echo '13' > /proc/acpi/video/GFX0/DD02/brightness;
bash-4.1# for i in \
$(cat /proc/acpi/video/GFX0/DD02/brightness|grep 'levels'|sed -e 's#levels:##g'); do \
echo $i > /proc/acpi/video/GFX0/DD02/brightness; sleep 1; \done

fujitsu_siemens_brightness_fun.sh script is fun to observe in changing the LCD screen gradually in one second intervals 🙂

Here is also a tiny program that reduces and increases the notebook laptop brightness written in C. My friend Dido, coded it in just few minutes just for the fun 🙂
To permanently solve the issues with darkened screen on boot time it is a good idea to include echo '100' > /proc/acpi/video/GFX0/DD02/brigthness in /etc/rc.local:

bash-4.1# echo '100' > /proc/acpi/video/GFX0/DD02/brigthness

I've also written another Universal Linux Increase laptop screen brightness Shell script which should be presumable also working for all Laptop models running Linux 🙂

My maximize_all_linux_laptops_brightness.sh "universal increase Linux brightness" script is here
I'll be glad to hear from people who had tested the script on other laptops and can confirm it works fine for them.