openssl-pkey - public or private key processing command

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       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
       <https://www.openssl.org/source/license.html>.

3.4.1                                              2025-04-03                                 OPENSSL-PKEY(1SSL)

       This command processes public or private keys. They can be converted between various forms and their
       components printed.

       To remove the pass phrase on a private key:

        openssl pkey -in key.pem -out keyout.pem

       To encrypt a private key using triple DES:

        openssl pkey -in key.pem -des3 -out keyout.pem

       To convert a private key from PEM to DER format:

        openssl pkey -in key.pem -outform DER -out keyout.der

       To print out the components of a private key to standard output:

        openssl pkey -in key.pem -text -noout

       To print out the public components of a private key to standard output:

        openssl pkey -in key.pem -text_pub -noout

       To just output the public part of a private key:

        openssl pkey -in key.pem -pubout -out pubkey.pem

       To change the EC parameters encoding to explicit:

        openssl pkey -in key.pem -ec_param_enc explicit -out keyout.pem

       To change the EC point conversion form to compressed:

        openssl pkey -in key.pem -ec_conv_form compressed -out keyout.pem

       The -engine option was deprecated in OpenSSL 3.0.

       openssl-pkey - public or private key processing command

Generaloptions-help
           Print out a usage message.

       -engineid
           See "Engine Options" in openssl(1).  This option is deprecated.

       -providername-provider-pathpath-propquerypropq
           See "Provider Options" in openssl(1), provider(7), and property(7).

       -check
           This option checks the consistency of a key pair for both public and private components.

       -pubcheck
           This option checks the correctness of either a public key or the public component of a key pair.

   Inputoptions-infilename|uri
           This  specifies  the  input to read a key from or standard input if this option is not specified.  If
           the key input is encrypted and -passin is not given a pass phrase will be prompted for.

       -informDER|PEM|P12|ENGINE
           The key input format; unspecified by default.  See openssl-format-options(1) for details.

       -passinarg
           The password source for the key input.

           For more information about the format of arg see openssl-passphrase-options(1).

       -pubin
           By default a private key is read from the input.  With this option a public key is read instead.   If
           the input contains no public key but a private key, its public part is used.

   Outputoptions-outfilename
           This  specifies  the output filename to save the encoded and/or text output of key or standard output
           if this option is not specified.  If any cipher option is set but no -passout is given  then  a  pass
           phrase will be prompted for.  The output filename should not be the same as the input filename.

       -outformDER|PEM
           The key output format; the default is PEM.  See openssl-format-options(1) for details.

       -cipher
           Encrypt  the  PEM  encoded  private  key  with  the  supplied  cipher. Any algorithm name accepted by
           EVP_get_cipherbyname() is acceptable such as aes128.  Encryption is not supported for DER output.

       -passoutarg
           The password source for the output file.

           For more information about the format of arg see openssl-passphrase-options(1).

       -traditional
           Normally a private key is written using standard format: this is PKCS#8  form  with  the  appropriate
           encryption  algorithm  (if any). If the -traditional option is specified then the older "traditional"
           format is used instead.

       -pubout
           By default the private and public key is output; this option  restricts  the  output  to  the  public
           components.  This option is automatically set if the input is a public key.

           When combined with -text, this is equivalent to -text_pub.

       -noout
           Do not output the key in encoded form.

       -text
           Output the various key components in plain text (possibly in addition to the PEM encoded form).  This
           cannot be combined with encoded output in DER format.

       -text_pub
           Output  in text form only the public key components (also for private keys).  This cannot be combined
           with encoded output in DER format.

       -ec_conv_formarg
           This option only applies to elliptic-curve based keys.

           This specifies how the points on the elliptic curve are converted into octet strings. Possible values
           are: compressed (the default value), uncompressed and hybrid.  For  more  information  regarding  the
           point  conversion  forms  please  read  the X9.62 standard.  Note Due to patent issues the compressed
           option is disabled by default for binary curves and can be enabled by defining the preprocessor macro
           OPENSSL_EC_BIN_PT_COMP at compile time.

       -ec_param_encarg
           This option only applies to elliptic curve based public and private keys.

           This specifies how the elliptic curve parameters are encoded.  Possible value are: named_curve,  i.e.
           the  ec  parameters are specified by an OID, or explicit where the ec parameters are explicitly given
           (see RFC 3279 for the definition of the EC parameters structures). The default value is  named_curve.
           Note the implicitlyCA alternative, as specified in RFC 3279, is currently not implemented in OpenSSL.

openssl(1),  openssl-genpkey(1),  openssl-rsa(1),  openssl-pkcs8(1),  openssl-dsa(1),  openssl-genrsa(1),
       openssl-gendsa(1)

opensslpkey [-help] [-engineid] [-providername] [-provider-pathpath] [-propquerypropq] [-check]
       [-pubcheck] [-infilename|uri] [-informDER|PEM|P12|ENGINE] [-passinarg] [-pubin] [-outfilename]
       [-outformDER|PEM] [-cipher] [-passoutarg] [-traditional] [-pubout] [-noout] [-text] [-text_pub]
       [-ec_conv_formarg] [-ec_param_encarg]