308 lines
8.1 KiB
Plaintext
308 lines
8.1 KiB
Plaintext
|
=pod
|
||
|
|
|
||
|
|
=begin comment
|
||
|
|
|
||
|
|
WARNING: do not edit!
|
||
|
|
Generated by Makefile from doc/man1/openssl-dgst.pod.in
|
||
|
|
|
||
|
|
=end comment
|
||
|
|
|
||
|
|
=head1 NAME
|
||
|
|
|
||
|
|
openssl-dgst - perform digest operations
|
||
|
|
|
||
|
|
=head1 SYNOPSIS
|
||
|
|
|
||
|
|
B<openssl> B<dgst>|I<digest>
|
||
|
|
[B<-I<digest>>]
|
||
|
|
[B<-list>]
|
||
|
|
[B<-help>]
|
||
|
|
[B<-c>]
|
||
|
|
[B<-d>]
|
||
|
|
[B<-debug>]
|
||
|
|
[B<-hex>]
|
||
|
|
[B<-binary>]
|
||
|
|
[B<-xoflen> I<length>]
|
||
|
|
[B<-r>]
|
||
|
|
[B<-out> I<filename>]
|
||
|
|
[B<-sign> I<filename>|I<uri>]
|
||
|
|
[B<-keyform> B<DER>|B<PEM>|B<P12>|B<ENGINE>]
|
||
|
|
[B<-passin> I<arg>]
|
||
|
|
[B<-verify> I<filename>]
|
||
|
|
[B<-prverify> I<filename>]
|
||
|
|
[B<-signature> I<filename>]
|
||
|
|
[B<-sigopt> I<nm>:I<v>]
|
||
|
|
[B<-hmac> I<key>]
|
||
|
|
[B<-mac> I<alg>]
|
||
|
|
[B<-macopt> I<nm>:I<v>]
|
||
|
|
[B<-fips-fingerprint>]
|
||
|
|
[B<-engine> I<id>]
|
||
|
|
[B<-engine_impl> I<id>]
|
||
|
|
[B<-rand> I<files>]
|
||
|
|
[B<-writerand> I<file>]
|
||
|
|
[B<-provider> I<name>]
|
||
|
|
[B<-provider-path> I<path>]
|
||
|
|
[B<-propquery> I<propq>]
|
||
|
|
[I<file> ...]
|
||
|
|
|
||
|
|
=head1 DESCRIPTION
|
||
|
|
|
||
|
|
This command output the message digest of a supplied file or files
|
||
|
|
in hexadecimal, and also generates and verifies digital
|
||
|
|
signatures using message digests.
|
||
|
|
|
||
|
|
The generic name, B<openssl dgst>, may be used with an option specifying the
|
||
|
|
algorithm to be used.
|
||
|
|
The default digest is B<sha256>.
|
||
|
|
A supported I<digest> name may also be used as the sub-command name.
|
||
|
|
To see the list of supported algorithms, use C<openssl list -digest-algorithms>
|
||
|
|
|
||
|
|
=head1 OPTIONS
|
||
|
|
|
||
|
|
=over 4
|
||
|
|
|
||
|
|
=item B<-help>
|
||
|
|
|
||
|
|
Print out a usage message.
|
||
|
|
|
||
|
|
=item B<-I<digest>>
|
||
|
|
|
||
|
|
Specifies name of a supported digest to be used. See option B<-list> below :
|
||
|
|
|
||
|
|
=item B<-list>
|
||
|
|
|
||
|
|
Prints out a list of supported message digests.
|
||
|
|
|
||
|
|
=item B<-c>
|
||
|
|
|
||
|
|
Print out the digest in two digit groups separated by colons, only relevant if
|
||
|
|
the B<-hex> option is given as well.
|
||
|
|
|
||
|
|
=item B<-d>, B<-debug>
|
||
|
|
|
||
|
|
Print out BIO debugging information.
|
||
|
|
|
||
|
|
=item B<-hex>
|
||
|
|
|
||
|
|
Digest is to be output as a hex dump. This is the default case for a "normal"
|
||
|
|
digest as opposed to a digital signature. See NOTES below for digital
|
||
|
|
signatures using B<-hex>.
|
||
|
|
|
||
|
|
=item B<-binary>
|
||
|
|
|
||
|
|
Output the digest or signature in binary form.
|
||
|
|
|
||
|
|
=item B<-xoflen> I<length>
|
||
|
|
|
||
|
|
Set the output length for XOF algorithms, such as B<shake128> and B<shake256>.
|
||
|
|
This option is not supported for signing operations.
|
||
|
|
|
||
|
|
For OpenSSL providers it is recommended to set this value for shake algorithms,
|
||
|
|
since the default values are set to only supply half of the maximum security
|
||
|
|
strength.
|
||
|
|
|
||
|
|
For backwards compatibility reasons the default xoflen length for B<shake128> is
|
||
|
|
16 (bytes) which results in a security strength of only 64 bits. To ensure the
|
||
|
|
maximum security strength of 128 bits, the xoflen should be set to at least 32.
|
||
|
|
|
||
|
|
For backwards compatibility reasons the default xoflen length for B<shake256> is
|
||
|
|
32 (bytes) which results in a security strength of only 128 bits. To ensure the
|
||
|
|
maximum security strength of 256 bits, the xoflen should be set to at least 64.
|
||
|
|
|
||
|
|
=item B<-r>
|
||
|
|
|
||
|
|
=for openssl foreign manual sha1sum(1)
|
||
|
|
|
||
|
|
Output the digest in the "coreutils" format, including newlines.
|
||
|
|
Used by programs like L<sha1sum(1)>.
|
||
|
|
|
||
|
|
=item B<-out> I<filename>
|
||
|
|
|
||
|
|
Filename to output to, or standard output by default.
|
||
|
|
|
||
|
|
=item B<-sign> I<filename>|I<uri>
|
||
|
|
|
||
|
|
Digitally sign the digest using the given private key. Note this option
|
||
|
|
does not support Ed25519 or Ed448 private keys. Use the L<openssl-pkeyutl(1)>
|
||
|
|
command instead for this.
|
||
|
|
|
||
|
|
=item B<-keyform> B<DER>|B<PEM>|B<P12>|B<ENGINE>
|
||
|
|
|
||
|
|
The format of the key to sign with; unspecified by default.
|
||
|
|
See L<openssl-format-options(1)> for details.
|
||
|
|
|
||
|
|
=item B<-sigopt> I<nm>:I<v>
|
||
|
|
|
||
|
|
Pass options to the signature algorithm during sign or verify operations.
|
||
|
|
Names and values of these options are algorithm-specific.
|
||
|
|
|
||
|
|
=item B<-passin> I<arg>
|
||
|
|
|
||
|
|
The private key password source. For more information about the format of I<arg>
|
||
|
|
see L<openssl-passphrase-options(1)>.
|
||
|
|
|
||
|
|
=item B<-verify> I<filename>
|
||
|
|
|
||
|
|
Verify the signature using the public key in "filename".
|
||
|
|
The output is either "Verified OK" or "Verification Failure".
|
||
|
|
|
||
|
|
=item B<-prverify> I<filename>
|
||
|
|
|
||
|
|
Verify the signature using the private key in "filename".
|
||
|
|
|
||
|
|
=item B<-signature> I<filename>
|
||
|
|
|
||
|
|
The actual signature to verify.
|
||
|
|
|
||
|
|
=item B<-hmac> I<key>
|
||
|
|
|
||
|
|
Create a hashed MAC using "key".
|
||
|
|
|
||
|
|
The L<openssl-mac(1)> command should be preferred to using this command line
|
||
|
|
option.
|
||
|
|
|
||
|
|
=item B<-mac> I<alg>
|
||
|
|
|
||
|
|
Create MAC (keyed Message Authentication Code). The most popular MAC
|
||
|
|
algorithm is HMAC (hash-based MAC), but there are other MAC algorithms
|
||
|
|
which are not based on hash, for instance B<gost-mac> algorithm,
|
||
|
|
supported by the B<gost> engine. MAC keys and other options should be set
|
||
|
|
via B<-macopt> parameter.
|
||
|
|
|
||
|
|
The L<openssl-mac(1)> command should be preferred to using this command line
|
||
|
|
option.
|
||
|
|
|
||
|
|
=item B<-macopt> I<nm>:I<v>
|
||
|
|
|
||
|
|
Passes options to MAC algorithm, specified by B<-mac> key.
|
||
|
|
Following options are supported by both by B<HMAC> and B<gost-mac>:
|
||
|
|
|
||
|
|
=over 4
|
||
|
|
|
||
|
|
=item B<key>:I<string>
|
||
|
|
|
||
|
|
Specifies MAC key as alphanumeric string (use if key contain printable
|
||
|
|
characters only). String length must conform to any restrictions of
|
||
|
|
the MAC algorithm for example exactly 32 chars for gost-mac.
|
||
|
|
|
||
|
|
=item B<hexkey>:I<string>
|
||
|
|
|
||
|
|
Specifies MAC key in hexadecimal form (two hex digits per byte).
|
||
|
|
Key length must conform to any restrictions of the MAC algorithm
|
||
|
|
for example exactly 32 chars for gost-mac.
|
||
|
|
|
||
|
|
=back
|
||
|
|
|
||
|
|
The L<openssl-mac(1)> command should be preferred to using this command line
|
||
|
|
option.
|
||
|
|
|
||
|
|
=item B<-fips-fingerprint>
|
||
|
|
|
||
|
|
Compute HMAC using a specific key for certain OpenSSL-FIPS operations.
|
||
|
|
|
||
|
|
=item B<-rand> I<files>, B<-writerand> I<file>
|
||
|
|
|
||
|
|
See L<openssl(1)/Random State Options> for details.
|
||
|
|
|
||
|
|
=item B<-engine> I<id>
|
||
|
|
|
||
|
|
See L<openssl(1)/Engine Options>.
|
||
|
|
This option is deprecated.
|
||
|
|
|
||
|
|
The engine is not used for digests unless the B<-engine_impl> option is
|
||
|
|
used or it is configured to do so, see L<config(5)/Engine Configuration Module>.
|
||
|
|
|
||
|
|
=item B<-engine_impl> I<id>
|
||
|
|
|
||
|
|
When used with the B<-engine> option, it specifies to also use
|
||
|
|
engine I<id> for digest operations.
|
||
|
|
|
||
|
|
|
||
|
|
=item B<-provider> I<name>
|
||
|
|
|
||
|
|
=item B<-provider-path> I<path>
|
||
|
|
|
||
|
|
=item B<-propquery> I<propq>
|
||
|
|
|
||
|
|
See L<openssl(1)/Provider Options>, L<provider(7)>, and L<property(7)>.
|
||
|
|
|
||
|
|
=item I<file> ...
|
||
|
|
|
||
|
|
File or files to digest. If no files are specified then standard input is
|
||
|
|
used.
|
||
|
|
|
||
|
|
=back
|
||
|
|
|
||
|
|
|
||
|
|
=head1 EXAMPLES
|
||
|
|
|
||
|
|
To create a hex-encoded message digest of a file:
|
||
|
|
|
||
|
|
openssl dgst -md5 -hex file.txt
|
||
|
|
or
|
||
|
|
openssl md5 file.txt
|
||
|
|
|
||
|
|
To sign a file using SHA-256 with binary file output:
|
||
|
|
|
||
|
|
openssl dgst -sha256 -sign privatekey.pem -out signature.sign file.txt
|
||
|
|
or
|
||
|
|
openssl sha256 -sign privatekey.pem -out signature.sign file.txt
|
||
|
|
|
||
|
|
To verify a signature:
|
||
|
|
|
||
|
|
openssl dgst -sha256 -verify publickey.pem \
|
||
|
|
-signature signature.sign \
|
||
|
|
file.txt
|
||
|
|
|
||
|
|
|
||
|
|
=head1 NOTES
|
||
|
|
|
||
|
|
The digest mechanisms that are available will depend on the options
|
||
|
|
used when building OpenSSL.
|
||
|
|
The C<openssl list -digest-algorithms> command can be used to list them.
|
||
|
|
|
||
|
|
New or agile applications should use probably use SHA-256. Other digests,
|
||
|
|
particularly SHA-1 and MD5, are still widely used for interoperating
|
||
|
|
with existing formats and protocols.
|
||
|
|
|
||
|
|
When signing a file, this command will automatically determine the algorithm
|
||
|
|
(RSA, ECC, etc) to use for signing based on the private key's ASN.1 info.
|
||
|
|
When verifying signatures, it only handles the RSA, DSA, or ECDSA signature
|
||
|
|
itself, not the related data to identify the signer and algorithm used in
|
||
|
|
formats such as x.509, CMS, and S/MIME.
|
||
|
|
|
||
|
|
A source of random numbers is required for certain signing algorithms, in
|
||
|
|
particular ECDSA and DSA.
|
||
|
|
|
||
|
|
The signing and verify options should only be used if a single file is
|
||
|
|
being signed or verified.
|
||
|
|
|
||
|
|
Hex signatures cannot be verified using B<openssl>. Instead, use "xxd -r"
|
||
|
|
or similar program to transform the hex signature into a binary signature
|
||
|
|
prior to verification.
|
||
|
|
|
||
|
|
The L<openssl-mac(1)> command is preferred over the B<-hmac>, B<-mac> and
|
||
|
|
B<-macopt> command line options.
|
||
|
|
|
||
|
|
=head1 SEE ALSO
|
||
|
|
|
||
|
|
L<openssl-mac(1)>
|
||
|
|
|
||
|
|
=head1 HISTORY
|
||
|
|
|
||
|
|
The default digest was changed from MD5 to SHA256 in OpenSSL 1.1.0.
|
||
|
|
The FIPS-related options were removed in OpenSSL 1.1.0.
|
||
|
|
|
||
|
|
The B<-engine> and B<-engine_impl> options were deprecated in OpenSSL 3.0.
|
||
|
|
|
||
|
|
=head1 COPYRIGHT
|
||
|
|
|
||
|
|
Copyright 2000-2022 The OpenSSL Project Authors. All Rights Reserved.
|
||
|
|
|
||
|
|
Licensed under the Apache License 2.0 (the "License"). You may not use
|
||
|
|
this file except in compliance with the License. You can obtain a copy
|
||
|
|
in the file LICENSE in the source distribution or at
|
||
|
|
L<https://www.openssl.org/source/license.html>.
|
||
|
|
|
||
|
|
=cut
|