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openssl genpkey

OpenSSL command to generate asymmetric key pairs.

More information.

• Generate an RSA private key of 2048 bits, saving it to a specific file:

openssl genpkey -algorithm rsa -pkeyopt rsa_keygen_bits:{2048} -out {filename.key}

• Generate an elliptic curve private key using the curve `prime256v1`, saving it to a specific file:

openssl genpkey -algorithm EC -pkeyopt ec_paramgen_curve:{prime256v1} -out {filename.key}

• Generate an `ED25519` elliptic curve private key, saving it to a specific file:

openssl genpkey -algorithm {ED25519} -out {filename.key}

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