PGP file decryption

Question

Hi All,
I'm looking for an API to decrypt PGP encrypted files.
I were using command line PGP program to do it. Sometimes it fails, so I decided to look for some other solutions.

Another question would be if I could use MS CryptoAPI to decrypt PGP encrypted files?
Any help appreciated.
Thank you in advance.

Answer 1

You need some version of PGP, either the free or commercial version you are using. There is no API to my knowledge. Search online for PGP implementations and pick the one that is most convenient. As long as you have your key ring and your private key and the public key used for the message encyption you'll be fine.

Unfortunately MS CryptoAPI will not work with PGP.

 

Answer 2

Hi Alex,
I found a DLL called NSDPGP.DLL. A free program, tested it and worked very well.
Thank you very much.

Answer 3

I use this product http://www.eldos.com/sbb/ SecureBlackbox, If you decide to use the Component, I can post some code too. Hope this helps.

Answer 4

 

I’m using SecureBlackbox(3rd party) PGP component into BTS 2006 R2.  Now am getting “Cannot modify Key” error.

FYI:  I’m not modifying any key value.

 

Let me get help...

 

Thanks,

Raja

Answer 5

Vasim wrote:

I use this product http://www.eldos.com/sbb/ SecureBlackbox, If you decide to use the Component, I can post some code too. Hope this helps.

 

I would appreciate if you would post some code.  I have been looking at Eldos as well.  I have been having troubles getting even the most basic functions to work.  Example:

 

oKeyRing = CREATEOBJECT("pgpbbox.ElPGPKeyringX")
oKeyRing.loadFromFiles("s:\crypto\public.pkr","",.T.)

 

The message displayed by the system is:
OLE IDispatch exception code 0 from pgpbbox.ElPGPKeyringX: Failed to open file.

 

The equivalent from VB works great. So - the key is there and is accessable to applications.

I also have included the private key as parameter 2, rather than a blank.  Same error.

 

There seems to be a lack of selection for good activex components that can do PGP.  The one that I thought would do great was from Xceed - but they only supported RSA w/o the PGP wrapper. 

 

Thanks in advance for your help.

Answer 6

Sorry for the delay, here is the function I wrote (see below) that I use with Eldos PGP.

 

I do not get your error, I noticed you are using public.pkr, hmmm, I always export one key for use, the public.pkr might contain multiple PGP keys, try to export and use just one, hope this helps.

 

Code Snippet

*=================================================================================================

function pgpEncrypt

lparameters tcInFile, tcOutFile, tcPGPKeyFile, tlUseNewFeatures, tlArmor

local llOk as Boolean

llOk = .T.

try

local loPGPLicense as "BaseBBox.ElSBLicenseManagerX"

loPGPLicense = CreateObject("BaseBBox.ElSBLicenseManagerX")

loPGPLicense.SetLicenseKey("Your License Key Here")

 

local loPGPKeys as 'pgpbbox.ElPGPKeyringX'

loPGPKeys = createobject('pgpbbox.ElPGPKeyringX')

loPGPKeys.LoadFromFiles(tcPGPKeyFile,"",.T.)

 

local loPGP as 'pgpbbox.ElPGPWriterX'

loPGP = createobject('pgpbbox.ElPGPWriterX')

loPGP.EncryptingKeys = loPGPKeys

loPGP.UseNewFeatures = tlUseNewFeatures

loPGP.Armor= tlArmor

loPGP.UseOldPackets = .F.

loPGP.Compress = .T.

 

#DEFINE etPublicKey 0

#DEFINE etPassphrase 1

#DEFINE etBoth 2

 

loPGP.EncryptionType= etPublicKey

loPGP.Filename = justfname(tcInFile)

loPGP.EncryptFile(tcInFile, tcOutFile)

catch

llOk = .F.

Finally

store null to loPGPKey,;

loPGP,;

loPGPLicense

endtry

 

return llOk

 

endfunc

*=================================================================================================

 

 

Answer 7

 

Hay ,

 

I need some help to use "DecryptPassword" functionality .

 

I only have my privte key say "abc" and PGP file .

 

i m using VS2005 and C# and its for win application.

 

Thanks

Kalia

Answer 8

Where did you find the NSDPGP.DLL program?

Answer 9

Check Below Link 

 

http://www.planet-source-code.com/URLSEO/vb/scripts/ShowCode!asp/txtCodeId!1268/lngWid!5/anyname.htm

 

http://www.nedcomp.nl/support/componenten/asp/nsdpgp_eol/readme.txt

 

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Kalpesh Chhatrala | Software Developer | Rajkot | India

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