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In experimenting with openssl on the Linux command line with elliptic curve secp256k1 I encountered a strange situation where on converting a DER private key file to PEM format using openssl pkey the Base64 in the PEM file does not match t… Continue reading Why does PEM Base64 created by `openssl pkey` not match the DER file passed in?
Both are binary files and both can store digital certificates and private keys.
Continue reading What’s the difference between DER and PKCS#12 formats? [closed]
There are plenty of instructions for converting PEM certificates to DER which also pop up when looking for ways to convert public keys.
These are among the options offered:
openssl x509 -in cert.pem -out cert.der
openssl rsa -in cert.pem -… Continue reading converting just a public key from PEM to DER using openssl
I am reverse engineering a binary that contains a raw, DER-encoded X.509 certificate containing a DSA public key. I want to replace this certificate with one that I have generated so that I have access to the private key.
Due to this certi… Continue reading Generating a DER-encoded DSA public key of a particular file size
When converting a password-protected PEM/PKCS1-encoded private key to DER format one is not able to encrypt the key, OpenSSL automagically asks for the password and writes the plain-text key in the output file.
However, I understand that P… Continue reading OpenSSL encrypt DER format private key
Is it possible to add a subject alternative name when converting PEM certificate to DER format.
openssl x509 -outform der -in Certificate.pem -out Certificate.der -extensions SAN -subject-alternative-name ‘alternative name’
If possible,… Continue reading How to add subject alternative name when converting PEM certificate to DER format?