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CertView

Simple X509 Viewer

Usage

certview <flags> [certificate Path or Host]
One or more certificates are needed

Allowed flags
  -allowInsecureTLS
        Allow insecure TLS connections
  -no-color
        Disable color output
  -output string
        Ouput format (txt,json,yaml) (default "txt")
  -remote
        Given Arguments are urls an not files

Examples

View Remote SSL

./certview -remote amazon.com:443
Certificate Information
         Common Name: *.peg.a2z.com
         Subject Alt Names: amazon.co.uk
                        uedata.amazon.co.uk
                        www.amazon.co.uk
                        origin-www.amazon.co.uk
                        *.peg.a2z.com
                        amazon.com
                        amzn.com
                        uedata.amazon.com
                        us.amazon.com
                        www.amazon.com
                        www.amzn.com
                        corporate.amazon.com
                        buybox.amazon.com
                        iphone.amazon.com
                        yp.amazon.com
                        home.amazon.com
                        origin-www.amazon.com
                        origin2-www.amazon.com
                        buckeye-retail-website.amazon.com
                        huddles.amazon.com
                        amazon.de
                        www.amazon.de
                        origin-www.amazon.de
                        amazon.co.jp
                        amazon.jp
                        www.amazon.jp
                        www.amazon.co.jp
                        origin-www.amazon.co.jp
                        *.aa.peg.a2z.com
                        *.ab.peg.a2z.com
                        *.ac.peg.a2z.com
                        origin-www.amazon.com.au
                        www.amazon.com.au
                        *.bz.peg.a2z.com
                        amazon.com.au
                        origin2-www.amazon.co.jp
         Not Before: 2021-10-06T00:00:00Z
         Not After: 2022-09-19T23:59:59Z
         Serial Number: E4239AB85E2E6A27C52C6DE9B9078D9
         Key Usages: Digital Signature,Key Encipherment
         Extended Key Usages: TLS Web Server Authentication,TLS Web Client Authentication
         Issuer: CN=DigiCert Global CA G2,O=DigiCert Inc,C=US
         sha1: 08040755C8B6852A5DB945A2B380571111DEFD2D
         sha-256: 5BF3D7E0E6927F773D5106C822C53F6F52C199F7EB1B3B8154B41F2924391C75

View Multiple Remotes, output as json

./certview -remote -output json www.apple.com:443 facebook.com:443
[
   {
      "commonName":"www.apple.com",
      "altNames":[
         "www.apple.com.cn",
         "www.apple.com",
         "images.apple.com"
      ],
      "notBefore":"2022-04-19T15:50:00Z",
      "notAfter":"2023-05-19T15:49:59Z",
      "keyUsages":[
         "Digital Signature",
         "Key Encipherment"
      ],
      "extKeyUsages":[
         "TLS Web Client Authentication",
         "TLS Web Server Authentication"
      ],
      "serialNumber":"B1C9AEACA963BA767CF0E174793B453",
      "issuer":"CN=Apple Public EV Server RSA CA 2 - G1,O=Apple Inc.,C=US",
      "fingerprints":[
         {
            "hash":"sha1",
            "fingerprint":"7BB1944F565D7D64A1455C91E5BA0CEAD9FB9150"
         },
         {
            "hash":"sha-256",
            "fingerprint":"011B158BABFC7C6A1F525822F1DEF13FE905AA506BB1600BEA5BA86A13ED06CA"
         }
      ]
   },
   {
      "commonName":"*.facebook.com",
      "altNames":[
         "*.facebook.com",
         "*.facebook.net",
         "*.fbcdn.net",
         "*.fbsbx.com",
         "*.m.facebook.com",
         "*.messenger.com",
         "*.xx.fbcdn.net",
         "*.xy.fbcdn.net",
         "*.xz.fbcdn.net",
         "facebook.com",
         "messenger.com"
      ],
      "notBefore":"2022-04-10T00:00:00Z",
      "notAfter":"2022-07-09T23:59:59Z",
      "keyUsages":[
         "Digital Signature"
      ],
      "extKeyUsages":[
         "TLS Web Server Authentication",
         "TLS Web Client Authentication"
      ],
      "serialNumber":"983ECB02EBF097EDDBD1DEACF50D5D6",
      "issuer":"CN=DigiCert SHA2 High Assurance Server CA,OU=www.digicert.com,O=DigiCert Inc,C=US",
      "fingerprints":[
         {
            "hash":"sha1",
            "fingerprint":"\"F4D8517CBD9F9A8AE32B30920C9"

View local, output as yaml

./createview -output yaml twitter.pem
- commonName: twitter.com
  altNames:
    - twitter.com
    - www.twitter.com
  notBefore: 2021-12-13T00:00:00Z
  notAfter: 2022-12-12T23:59:59Z
  keyUsages:
    - Digital Signature
    - Key Encipherment
  extKeyUsages:
    - TLS Web Server Authentication
    - TLS Web Client Authentication
  serialNumber: 630B4D3E1A04A3428146B4DBD1502B2
  issuer: CN=DigiCert TLS RSA SHA256 2020 CA1,O=DigiCert Inc,C=US
  fingerprints:
    - hash: sha1
      fingerprint: E3BA714291A065F576752BF0E0E18A1AE363A607
    - hash: sha-256
      fingerprint: D5D54531D10113F2ADBDF1B862440130920C4A5D4D6D924099585802FCAFB7CB