From: Adam Bozanich <adam.boz@...>
Date: 2007-12-08T08:47:30+09:00
Subject: Re: Modulus and Exponent

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On Dec 6, 2007 1:16 PM, Shandy Nantz <shandybleu@yahoo.com> wrote:

> Is there a way to get the modulus and exponent from an key, or is there
> a way to get that information as it is being encrypted? I am using the
> OpenSSL::PKey::RSA library to encrypt my data. Thanks,
>

It's in ext/openssl/ossl_pkey_rsa.c:ossl_rsa_get_params

sh-2.05b$ openssl genrsa -out test.pem 512
Generating RSA private key, 512 bit long modulus
......++++++++++++
.++++++++++++
e is 65537 (0x10001)
sh-2.05b$ cat sslparams.rb
require 'openssl'
file = ARGV[0] || "test.pem"
OpenSSL::PKey::RSA.new(File.read(file)).params.each do |k,v|
    puts "#{k} = #{v}"
end
sh-2.05b$ ruby sslparams.rb
iqmp =
59260111929228437887497692691757636132892230319984822766526877098035186370601
n =
11804463841624570992464253395735827528891316877747581110813958174030871384082650715713947258948719543061592249783350178655531273368202635182086293357491941
d =
11689187633396551317545091362483299497115519346555148562621014749226871236290914623323220129606434399743927309247086015156374960675693636631059313239642145
p =
112801836523523861906861645509931518041464374339361561066100421492644618944537
e = 65537
q =
104647798346464426891710400199240987063553868486458584292121861850498642450093
dmq1 =
99023959205578397450133824684619830214173568429859912795458096383091586608213
dmp1 =
53486077635053542407429782172225184600126728910320284879214346062284381856073

-Adam

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