Category Archives: Security

Powershell: Export/Convert a X509 Certificate to pem format

Hi,

powershell respectively the .NET framework does not offer a method to export a X509 certificate in PEM format. The pem format is a Base64 encoded view from the raw data with a header and a footer.

An example to export the machine certificate (with Thumbprint: 1C0381278083E3CB026E46A7FF09FC4B79543D) of an computer
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Powershell/Excel: Check if a excel document contains macros

Hi,

this script can be used to check if excel contains some active code. It opens the excel file in an safe way and looks for VB content and write the full file path to the console if macros are found.
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OpenSSL: Asymmetric en- and decryption of a file


Hi,

this post describes the en- and decryption of a file with a asymmetric encryption algorithm.

Asymmetric encryption means you encrypt data by a public key and can only decrypt this data with a private key associated with the public key.
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OpenSSL: Symmetric en- and decryption of a file


Hi,

this post describes the en- and decryption of a file with a symmetric encryption algorithm.

Symmetric encryption means encryption and decryption is only possible with the same secret/password.
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OpenSSL: Build on Windows

Hi,

these steps compile openssl on Windows.
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