[TriLUG] Converting XML Private Key

[John Wheeler]

I have run across something that has me quite stumped.

I work on the receiving end of a data feed upon which the rest of the  
team builds an application.
My job is data mapping and processing. Yes, boring... i know.

Recently a client became concerned about the safety of some pieces of  
feed data.
So they sent us an application called RSA.exe that generated a public/ 
private RSA keypair.
(example appended below)

So we sent them the public key, and some fields in the data stream are  
now base64 encoded strings.

My problem is that i have to decrypt these strings. And this is all  
the information that i have.
Long story short, i cannot get OpenSSL to recognize this Key Store  
Format. I am tempted to say that is is an export format supported by  
the .NET framework.
Being an open source shop here we do not delve into such mysteries.

If anyone recognizes or has a suggestion as to how i should go about  
processing a key store like this, I would be much obliged.


Keys are in the format of the following: (real values but of course  
not the set we are using)

Public key:
< 
RSAKeyValue 
 ><Modulus>wroG1oc9DGAIWeDjaZ8wPNvjNnoZ5XZp8D3/9utI6Cyqp8WIITCZdkMwpZ
YLJgjfGUxrvM0KecN5+HHFz8KzVgebxCJEwGfDUbb7wmS6zKJNORDfKDo/ 
G769N45RyWOqc0FZvove93
WCfF8+MpskQh/vLlrL86EJR0+5MHjMpac=</Modulus><Exponent>AQAB</Exponent></ 
RSAKeyVal
ue>

Private key:
< 
RSAKeyValue 
 ><D>kuO7VsbrkVM72Xjgc4OG4tHIYwbWVBbwMS7D0GKKO8G99hL27np3uRNUNgSqYkWc
7buNJf3SIioH7xb77g5kMndfm924B7DoXH3k8p8wjvTstdyFyG+YRydGShhGsBh/ 
njPYbk3IkPZ26RMj
r6GRRy5HF+NxWfkvvwCcWCrxABE=</ 
D><DP>OliC3puvMSD5vgkHiybUUxqjQ0WepuU48XARb3C2M0bN
/2gxbQuT0iPYbnuRZ2kOrPzNYSO9c0s1apszzXn8wQ==</ 
DP><DQ>myQAkY1GUQHLmUGiCQ81JDf2X90
9a/pOc1IXlaPhihdevdhNuil1Y2glckE9zVpkyusHVa0B9YDWDa7Ciyuf6Q==</ 
DQ><InverseQ>LvMe
ahcblnFbB0F6J7tIz5FvjlX8hWnihcLRqi+nbAlH/n07L5Ndllfunt42XwZ/ 
7Ft9gm4Rh9Nk0Wry8tzo
iQ==</ 
InverseQ 
 ><P>45uCDxgahtRHqjimGRZsKLNMCWZt562XBQN1BWWCviAzyEMPcJgmfLQXr1wohI
xIgOgFVRtJAZhFFjIzVQ5L/w==</P><Q>2wR+IurAet0laSQRBYbhZZa 
+Cj5rmEJzwiyg3iS7rjxjcb4
TxD2Eclt35KQLv8pHSarV2HDYzNimy29HS/PGWQ==</Q></RSAKeyValue>