Category Archives: openssl

openssl, Security

openssl: Show all certificates of a certificate bundle file

February 8, 2023 Michael Albert Leave a comment

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Hi,

the x509 option of openssl does only use the first certificate in a file.
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openssl

openssl: Establish a http connect behind a proxy

December 13, 2022 Michael Albert Leave a comment

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Hi,

since openssl 1.1.0 it is possible to establish a HTTPs CONNECT connection to a (Web)server behind a http proxy.

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Linux, openssl, Security

openssl: Verifiy failed with error 3 at 0 depth lookup: unable to get certificate CRL

October 26, 2022 Michael Albert Leave a comment

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Hi,

openssl can verify certificates against the root CA/intermediate CA chain and also can check a crl list if a certificate is revoked.
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Linux: Place own/custom certificates in /etc/ssl/certs

October 25, 2022 Michael Albert Leave a comment

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Hi,

sometimes it is necessary to add an own root/intermediate CA top your machine CA store.

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C#, openssl

C#: Import a rsa public key generated by openssl

February 21, 2022 Michael Albert Leave a comment

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Hi,

the C# (.NET 4) RSACryptoServiceProvider->ImportCspBlob methode has the ability to import RSA (public) keys.
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