Skip to main content
R
rick-h
Participating Frequently
April 8, 2007
Question

RSA Encryption Help with Bouncy Castle

  • April 8, 2007
  • 2 replies
  • 1506 views
Does anyone have experience doing RSA encryption with Bouncy Castle installed as a security provider?

For example, what is the proper syntax of the Encrypt(string, key[, algorithm[, encoding]])) function to send an RSA encrypted string to someone given the following values:

string = "This is the string to encrypt"
RSA Public Key Moduls = qFP+TNkUxiwqgYkce7iBR1Z2VndmSDLlxM0UQEW5UQQPdTWdEl6iIjteIZr5M9R6EBsGh6XKHG7et9SAJ/0h/OwBJMOaoGpoQq2IJHKqKA4UhC30fnFZcfVz6ne4dTUemkJinIUiSlHLaChdANoe9lC9wNVGu1tUpkiwj+Pn4/c=
RSA Public Key Exponent = AQAB
Padding = pKCS#1 v1.5

Thanks in advance for any help you can provide.
This topic has been closed for replies.

2 replies

C
c_wigginton
Participating Frequently
April 9, 2007
my previous post is only an example using the standard encrypt/decrypt using twofish from bouncy castle. The following link ( http://www.adobe.com/cfusion/knowledgebase/index.cfm?id=e546373d) will give you more information on using Bouncy Castle as a security provider.

For PGP, most solutions I've seen use either a custom tag, cfexecute, or possibly the Java route ( http://cephas.net/blog/2004/04/01/pgp-encryption-using-bouncy-castle/)

Hopefully this will give you something to go on.
C
c_wigginton
Participating Frequently
April 9, 2007
<cfsavecontent variable="myText">
This is a bunch of text that will
be encrypted in the file.
</cfsavecontent>


<cfset myKey = ToBase64("F00BarKey")>

<b>Encrypted Key</b>
<p>
<cfoutput>#myKey#</cfoutput>
</p>

<cfset crypText = Encrypt(myText,myKey,"twofish")>

<cfset deCryptText = Decrypt(crypText,myKey,"twofish")>
<b>Encrypted Text</b>
<p>
<cfoutput>#crypText#</cfoutput>
</p>
<p>
<b>Un-Encrypted Text</b>
<p>
<cfoutput>#deCryptText#</cfoutput>
</p>
R
rick-hAuthor
Participating Frequently
April 9, 2007
Hi, Thanks for your reply. A couple of clarifications. I need to use the public key provided by the a 3rd party that I am sending encrypted data to, and I must use RSA encryption. I believe what I am looking for will be something like:

<cfsavecontent variable="myText">
This is a bunch of text that will
be encrypted in the file.
</cfsavecontent>

<cfset myText_encrypted = encrypt(myText, pubKey, "RSA/NONE/PKCS1Padding")>

I am not sure how to set the value of pubKey. I have the Base64 encoded modulus and exponent for the 3rd parties Public Key, but I am not sure how to convert the modulus and exponent into the key format that the encrypt() function is looking for.
Terms & ConditionsAccessibility statement
Using the community Terms of use Privacy Cookie preferences Do not sell or share my personal information ad choicesAdChoices