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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/genrsa.pod | |
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Diffstat (limited to 'openssl/doc/apps/genrsa.pod')
-rw-r--r-- | openssl/doc/apps/genrsa.pod | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/openssl/doc/apps/genrsa.pod b/openssl/doc/apps/genrsa.pod new file mode 100644 index 000000000..25af4d147 --- /dev/null +++ b/openssl/doc/apps/genrsa.pod @@ -0,0 +1,96 @@ +=pod + +=head1 NAME + +genrsa - generate an RSA private key + +=head1 SYNOPSIS + +B<openssl> B<genrsa> +[B<-out filename>] +[B<-passout arg>] +[B<-des>] +[B<-des3>] +[B<-idea>] +[B<-f4>] +[B<-3>] +[B<-rand file(s)>] +[B<-engine id>] +[B<numbits>] + +=head1 DESCRIPTION + +The B<genrsa> command generates an RSA private key. + +=head1 OPTIONS + +=over 4 + +=item B<-out filename> + +the output filename. If this argument is not specified then standard output is +used. + +=item B<-passout arg> + +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<-des|-des3|-idea> + +These options encrypt the private key with the DES, triple DES, or the +IDEA ciphers respectively before outputting it. If none of these options is +specified no encryption is used. If encryption is used a pass phrase is prompted +for if it is not supplied via the B<-passout> argument. + +=item B<-F4|-3> + +the public exponent to use, either 65537 or 3. The default is 65537. + +=item B<-rand file(s)> + +a file or files containing random data used to seed the random number +generator, or an EGD socket (see L<RAND_egd(3)|RAND_egd(3)>). +Multiple files can be specified separated by a OS-dependent character. +The separator is B<;> for MS-Windows, B<,> for OpenVMS, and B<:> for +all others. + +=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. + +=item B<numbits> + +the size of the private key to generate in bits. This must be the last option +specified. The default is 512. + +=back + +=head1 NOTES + +RSA private key generation essentially involves the generation of two prime +numbers. When generating a private key various symbols will be output to +indicate the progress of the generation. A B<.> represents each number which +has passed an initial sieve test, B<+> means a number has passed a single +round of the Miller-Rabin primality test. A newline means that the number has +passed all the prime tests (the actual number depends on the key size). + +Because key generation is a random process the time taken to generate a key +may vary somewhat. + +=head1 BUGS + +A quirk of the prime generation algorithm is that it cannot generate small +primes. Therefore the number of bits should not be less that 64. For typical +private keys this will not matter because for security reasons they will +be much larger (typically 1024 bits). + +=head1 SEE ALSO + +L<gendsa(1)|gendsa(1)> + +=cut + |