{"id":20176883,"url":"https://github.com/chris-short/chkcerts","last_synced_at":"2025-10-28T09:47:32.049Z","repository":{"id":164562428,"uuid":"640030288","full_name":"chris-short/chkcerts","owner":"chris-short","description":"A Go program to display certificate chains simply and quickly with an easy to remember 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 \n![GitHub all releases](https://img.shields.io/github/downloads/chris-short/chkcerts/total)\n![GitHub repo size](https://img.shields.io/github/repo-size/chris-short/chkcerts)\n![GitHub contributors](https://img.shields.io/github/contributors/chris-short/chkcerts)\n\n![Twitter Follow](https://img.shields.io/twitter/follow/ChrisShort)\n\n\n\n\n# chkcerts\n\nA Go program to display certificate chains and validate their order in the same vein as [ssl-tester](https://github.com/chris-short/ssl-tester) but more flexible.\n\n## Usage\n\n\tchkcerts https://chrisshort.net\n\n\tchkcerts https://chrisshort.net 90\n\n### Example Output (no days)\n\n\tSubject: *.chrisshort.net\n\tIssuer: R3\n\tValid from: 2023-04-25 02:30:44 +0000 UTC\n\tValid until: 2023-07-24 02:30:43 +0000 UTC\n\tSerial number: 403588798235445259445834570997555816122123\n\tDNS Names: [*.chrisshort.net chrisshort.net]\n\tIP Addresses: []\n\tSignature algorithm: SHA256-RSA\n\t-----\n\tSubject: R3\n\tIssuer: ISRG Root X1\n\tValid from: 2020-09-04 00:00:00 +0000 UTC\n\tValid until: 2025-09-15 16:00:00 +0000 UTC\n\tSerial number: 192961496339968674994309121183282847578\n\tDNS Names: []\n\tIP Addresses: []\n\tSignature algorithm: SHA256-RSA\n\t-----\n\tSubject: ISRG Root X1\n\tIssuer: DST Root CA X3\n\tValid from: 2021-01-20 19:14:03 +0000 UTC\n\tValid until: 2024-09-30 18:14:03 +0000 UTC\n\tSerial number: 85078200265644417569109389142156118711\n\tDNS Names: []\n\tIP Addresses: []\n\tSignature algorithm: SHA256-RSA\n\t-----\n\tCertificate chain is valid and in the correct order.\n\n### Example Output with Days\n\n\tSubject: *.chrisshort.net\n\tIssuer: R3\n\tValid from: 2023-04-25 02:30:44 +0000 UTC\n\tValid until: 2023-07-24 02:30:43 +0000 UTC (66 days left)\n\tSerial number: 403588798235445259445834570997555816122123\n\tDNS Names: [*.chrisshort.net chrisshort.net]\n\tIP Addresses: []\n\tSignature algorithm: SHA256-RSA\n\t-----\n\tSubject: R3\n\tIssuer: ISRG Root X1\n\tValid from: 2020-09-04 00:00:00 +0000 UTC\n\tValid until: 2025-09-15 16:00:00 +0000 UTC\n\tSerial number: 192961496339968674994309121183282847578\n\tDNS Names: []\n\tIP Addresses: []\n\tSignature algorithm: SHA256-RSA\n\t-----\n\tSubject: ISRG Root X1\n\tIssuer: DST Root CA X3\n\tValid from: 2021-01-20 19:14:03 +0000 UTC\n\tValid until: 2024-09-30 18:14:03 +0000 UTC\n\tSerial number: 85078200265644417569109389142156118711\n\tDNS Names: []\n\tIP Addresses: []\n\tSignature algorithm: SHA256-RSA\n\t-----\n\tCertificate chain is valid and in the correct order.\n\n## About\n\nThere's a general lack of understanding of how TLS works, the certificate chains used, or cryptography in general. Creating command line tools to help show folks how things work can't hurt, right?\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fchris-short%2Fchkcerts","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fchris-short%2Fchkcerts","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fchris-short%2Fchkcerts/lists"}