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author | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
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committer | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
commit | 3562e78743202e43aec8727005182a2558117eca (patch) | |
tree | 8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /openssl/doc/apps/rsa.pod | |
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Diffstat (limited to 'openssl/doc/apps/rsa.pod')
-rw-r--r-- | openssl/doc/apps/rsa.pod | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/openssl/doc/apps/rsa.pod b/openssl/doc/apps/rsa.pod new file mode 100644 index 000000000..4d7640995 --- /dev/null +++ b/openssl/doc/apps/rsa.pod @@ -0,0 +1,189 @@ + +=pod + +=head1 NAME + +rsa - RSA key processing tool + +=head1 SYNOPSIS + +B<openssl> B<rsa> +[B<-inform PEM|NET|DER>] +[B<-outform PEM|NET|DER>] +[B<-in filename>] +[B<-passin arg>] +[B<-out filename>] +[B<-passout arg>] +[B<-sgckey>] +[B<-des>] +[B<-des3>] +[B<-idea>] +[B<-text>] +[B<-noout>] +[B<-modulus>] +[B<-check>] +[B<-pubin>] +[B<-pubout>] +[B<-engine id>] + +=head1 DESCRIPTION + +The B<rsa> command processes RSA keys. They can be converted between various +forms and their components printed out. B<Note> this command uses the +traditional SSLeay compatible format for private key encryption: newer +applications should use the more secure PKCS#8 format using the B<pkcs8> +utility. + +=head1 COMMAND OPTIONS + +=over 4 + +=item B<-inform DER|NET|PEM> + +This specifies the input format. The B<DER> option uses an ASN1 DER encoded +form compatible with the PKCS#1 RSAPrivateKey or SubjectPublicKeyInfo format. +The B<PEM> form is the default format: it consists of the B<DER> format base64 +encoded with additional header and footer lines. On input PKCS#8 format private +keys are also accepted. The B<NET> form is a format is described in the B<NOTES> +section. + +=item B<-outform DER|NET|PEM> + +This specifies the output format, the options have the same meaning as the +B<-inform> option. + +=item B<-in filename> + +This specifies the input filename to read a key from or standard input if this +option is not specified. If the key is encrypted a pass phrase will be +prompted for. + +=item B<-passin arg> + +the input file password source. For more information about the format of B<arg> +see the B<PASS PHRASE ARGUMENTS> section in L<openssl(1)|openssl(1)>. + +=item B<-out filename> + +This specifies the output filename to write a key to or standard output if this +option is not specified. If any encryption options are set then a pass phrase +will be prompted for. The output filename should B<not> be the same as the input +filename. + +=item B<-passout password> + +the output file password source. For more information about the format of B<arg> +see the B<PASS PHRASE ARGUMENTS> section in L<openssl(1)|openssl(1)>. + +=item B<-sgckey> + +use the modified NET algorithm used with some versions of Microsoft IIS and SGC +keys. + +=item B<-des|-des3|-idea> + +These options encrypt the private key with the DES, triple DES, or the +IDEA ciphers respectively before outputting it. A pass phrase is prompted for. +If none of these options is specified the key is written in plain text. This +means that using the B<rsa> utility to read in an encrypted key with no +encryption option can be used to remove the pass phrase from a key, or by +setting the encryption options it can be use to add or change the pass phrase. +These options can only be used with PEM format output files. + +=item B<-text> + +prints out the various public or private key components in +plain text in addition to the encoded version. + +=item B<-noout> + +this option prevents output of the encoded version of the key. + +=item B<-modulus> + +this option prints out the value of the modulus of the key. + +=item B<-check> + +this option checks the consistency of an RSA private key. + +=item B<-pubin> + +by default a private key is read from the input file: with this +option a public key is read instead. + +=item B<-pubout> + +by default a private key is output: with this option a public +key will be output instead. This option is automatically set if +the input is a public key. + +=item B<-engine id> + +specifying an engine (by it's unique B<id> string) will cause B<req> +to attempt to obtain a functional reference to the specified engine, +thus initialising it if needed. The engine will then be set as the default +for all available algorithms. + +=back + +=head1 NOTES + +The PEM private key format uses the header and footer lines: + + -----BEGIN RSA PRIVATE KEY----- + -----END RSA PRIVATE KEY----- + +The PEM public key format uses the header and footer lines: + + -----BEGIN PUBLIC KEY----- + -----END PUBLIC KEY----- + +The B<NET> form is a format compatible with older Netscape servers +and Microsoft IIS .key files, this uses unsalted RC4 for its encryption. +It is not very secure and so should only be used when necessary. + +Some newer version of IIS have additional data in the exported .key +files. To use these with the utility, view the file with a binary editor +and look for the string "private-key", then trace back to the byte +sequence 0x30, 0x82 (this is an ASN1 SEQUENCE). Copy all the data +from this point onwards to another file and use that as the input +to the B<rsa> utility with the B<-inform NET> option. If you get +an error after entering the password try the B<-sgckey> option. + +=head1 EXAMPLES + +To remove the pass phrase on an RSA private key: + + openssl rsa -in key.pem -out keyout.pem + +To encrypt a private key using triple DES: + + openssl rsa -in key.pem -des3 -out keyout.pem + +To convert a private key from PEM to DER format: + + openssl rsa -in key.pem -outform DER -out keyout.der + +To print out the components of a private key to standard output: + + openssl rsa -in key.pem -text -noout + +To just output the public part of a private key: + + openssl rsa -in key.pem -pubout -out pubkey.pem + +=head1 BUGS + +The command line password arguments don't currently work with +B<NET> format. + +There should be an option that automatically handles .key files, +without having to manually edit them. + +=head1 SEE ALSO + +L<pkcs8(1)|pkcs8(1)>, L<dsa(1)|dsa(1)>, L<genrsa(1)|genrsa(1)>, +L<gendsa(1)|gendsa(1)> + +=cut |