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openssl dgst — OpenSSL command to generate digest values and perform signature operations. More information: <https

Submitted by: @import:tldr-pages·Mar 2, 2026·

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commandopensslvaluescliopenssl dgstgeneratedigest

Problem

How to use the openssl dgst command: OpenSSL command to generate digest values and perform signature operations. More information: <https://docs.openssl.org/master/man1/openssl-dgst/>.

Solution

openssl dgst — OpenSSL command to generate digest values and perform signature operations. More information: <https://docs.openssl.org/master/man1/openssl-dgst/>.

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

openssl dgst -sha256 -binary -out {{output_file}} {{input_file}}

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}}

Verify an RSA signature:

openssl dgst -verify {{public_key_file}} -signature {{signature_file}} -sigopt rsa_padding_mode:pss {{signature_message_file}}

Sign a file using and ECDSA key:

openssl dgst -sign {{private_key_file}} -sha256 -out {{output_file}} {{input_file}}

Verify an ECDSA signature:

openssl dgst -verify {{public_key_file}} -signature {{signature_file}} {{signature_message_file}}

Code Snippets

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

openssl dgst -sha256 -binary -out {{output_file}} {{input_file}}

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}}

Verify an RSA signature

openssl dgst -verify {{public_key_file}} -signature {{signature_file}} -sigopt rsa_padding_mode:pss {{signature_message_file}}

Sign a file using and ECDSA key

openssl dgst -sign {{private_key_file}} -sha256 -out {{output_file}} {{input_file}}

Verify an ECDSA signature

openssl dgst -verify {{public_key_file}} -signature {{signature_file}} {{signature_message_file}}

Context

tldr-pages: common/openssl dgst

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