openssl-dgst

OpenSSL command to generate digest values and perform signature operations.

TLDR

Calculate the SHA256 digest for a file, saving the result to a specific file

$ openssl dgst -sha256 -binary -out [output_file] [input_file]
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Sign a file using an RSA key, saving the result to a specific file

$ openssl dgst -sign [private_key_file] -sha256 -sigopt rsa_padding_mode:pss -out [output_file] [input_file]
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Verify an RSA signature

$ openssl dgst -verify [public_key_file] -signature [signature_file] -sigopt rsa_padding_mode:pss [signature_message_file]
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Sign a file using and ECDSA key

$ openssl dgst -sign [private_key_file] -sha256 -out [output_file] [input_file]
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Verify an ECDSA signature

$ openssl dgst -verify [public_key_file] -signature [signature_file] [signature_message_file]
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