Openssl dsaparam命令

openssl dsaparam [-inform DER|PEM] [-outform DER|PEM] [-in filename ] [-out filename] [-noout] [-text] [-C] [-rand file(s)] [-genkey] [-engine id] [number] [-timebomb n]

-inform arg   input format - DER or PEM
-outform arg  output format - DER or PEM
-in arg       input file
-out arg      output file
-text         print as text
-C            Output C code
-noout        no output
-genkey       generate a DSA key
-rand         files to use for random number input
-engine e     use engine e, possibly a hardware device.
number        number of bits to use for generating private key

openssl dsaparam -genkey 512 -out dsaprikey.pem

openssl dsaparam -in dsaprikey.pem –text

参考：http://blog.csdn.net/as3luyuan123/article/details/14138693