13938aceca
yet. Add a function X509_STORE_CTX_purpose_inherit() which implements the logic of "inheriting" purpose and trust from a parent structure and using a default: this will be used in the SSL code and possibly future S/MIME. Partial documentation of the 'verify' utility. Still need to document how all the extension checking works and the various error messages.
161 lines
4.2 KiB
Plaintext
161 lines
4.2 KiB
Plaintext
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=pod
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=head1 NAME
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rsa - RSA key processing tool
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=head1 SYNOPSIS
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B<openssl> B<rsa>
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[B<-inform PEM|NET|DER>]
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[B<-outform PEM|NET|DER>]
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[B<-in filename>]
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[B<-passin password>]
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[B<-envpassin var>]
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[B<-out filename>]
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[B<-passout password>]
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[B<-envpassout var>]
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[B<-des>]
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[B<-des3>]
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[B<-idea>]
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[B<-text>]
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[B<-noout>]
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[B<-modulus>]
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[B<-check>]
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[B<-pubin>]
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[B<-pubout>]
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=head1 DESCRIPTION
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The B<rsa> command processes RSA keys. They can be converted between various
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forms and their components printed out. B<Note> this command uses the
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traditional SSLeay compatible format for private key encryption: newer
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applications should use the more secure PKCS#8 format using the B<pkcs8>
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utility.
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=head1 COMMAND OPTIONS
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=over 4
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=item B<-inform DER|NET|PEM>
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This specifies the input format. The B<DER> option uses an ASN1 DER encoded
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form compatible with the PKCS#1 RSAPrivateKey or SubjectPublicKeyInfo format.
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The B<PEM> form is the default format: it consists of the B<DER> format base64
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encoded with additional header and footer lines. On input PKCS#8 format private
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keys are also accepted.The B<NET> form is a format compatible with older Netscape
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servers and MS IIS, this uses unsalted RC4 for its encryption. It is not very
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secure and so should only be used when necessary.
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=item B<-outform DER|NET|PEM>
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This specifies the output format, the options have the same meaning as the
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B<-inform> option.
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=item B<-in filename>
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This specifies the input filename to read a key from or standard input if this
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option is not specified. If the key is encrypted a pass phrase will be
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prompted for.
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=item B<-passin password>
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the input file password. Since certain utilities like "ps" make the command line
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visible this option should be used with caution.
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=item B<-envpassin var>
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read the input file password from the environment variable B<var>.
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=item B<-out filename>
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This specifies the output filename to write a key to or standard output by
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is not specified. If any encryption options are set then a pass phrase will be
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prompted for. The output filename should B<not> be the same as the input
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filename.
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=item B<-passout password>
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the output file password. Since certain utilities like "ps" make the command line
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visible this option should be used with caution.
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=item B<-envpassout var>
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read the output file password from the environment variable B<var>.
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=item B<-des|-des3|-idea>
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These options encrypt the private key with the DES, triple DES, or the
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IDEA ciphers respectively before outputting it. A pass phrase is prompted for.
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If none of these options is specified the key is written in plain text. This
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means that using the B<rsa> utility to read in an encrypted key with no
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encryption option can be used to remove the pass phrase from a key, or by
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setting the encryption options it can be use to add or change the pass phrase.
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These options can only be used with PEM format output files.
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=item B<-text>
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prints out the various public or private key components in
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plain text in addition to the encoded version.
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=item B<-noout>
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this option prevents output of the encoded version of the key.
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=item B<-modulus>
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this option prints out the value of the modulus of the key.
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=item B<-check>
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this option checks the consistency of an RSA private key.
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=item B<-pubin>
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by default a private key is input file with this option a public key is input
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instead.
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=item B<-pubout>
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by default a private key is output with this option a public
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key will be output instead. This option is automatically set if the input is
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a public key.
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=back
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=head1 NOTES
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The PEM private key format uses the header and footer lines:
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-----BEGIN RSA PRIVATE KEY-----
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-----END RSA PRIVATE KEY-----
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=head1 EXAMPLES
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To remove the pass phrase on an RSA private key:
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C<openssl rsa -in key.pem -out keyout.pem>
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To encrypt a private key using triple DES:
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C<openssl rsa -in key.pem -des3 -out keyout.pem>
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To convert a private key from PEM to DER format:
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C<openssl rsa -in key.pem -outform DER -out keyout.der>
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To print out the components of a private key to standard output:
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C<openssl rsa -in key.pem -text -noout>
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To just output the public part of a private key:
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C<openssl rsa -in key.pem -pubout -out pubkey.pem>
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=head1 SEE ALSO
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pkcs8(1), dsa(1), genrsa(1), gendsa(1)
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=cut
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