Class cast exception on decrypt

[mactenchi]

"org/sgonyea/pgp/Decryptor.java:138:in `decryptStream'"
java.lang.ClassCastException: org.bouncycastle.openpgp.PGPOnePassSignatureList cannot be cast to org.bouncycastle.openpgp.PGPLiteralData

I can encrypt/decrypt a message to myself fine, but this message is from someone else using my public key and it fails.

Please let me know if there's any more details I can provide.

[sgonyea]

Can you take the dummy pgp key in the spec folder and recreate the issue? (Or any dummy key)

With that I can fix.

Sent from my phone

On Aug 19, 2013, at 10:37 AM, mactenchi notifications@github.com wrote:

"org/sgonyea/pgp/Decryptor.java:138:in `decryptStream'"
java.lang.ClassCastException: org.bouncycastle.openpgp.PGPOnePassSignatureList cannot be cast to org.bouncycastle.openpgp.PGPLiteralData

I can encrypt/decrypt a message to myself fine, but this message is from someone else using my public key and it fails.

Please let me know if there's any more details I can provide.

—
Reply to this email directly or view it on GitHub.

[mactenchi]

I suspect the packet structure of this message is different to what you expect. I'll email the message to you so you can take a look.

[mactenchi]

Looks like the signature packet is throwing your code off. Maybe you could iterate nextObject until you get back a PGPLiteralData? I don't need signature validation to actually work for my use case.

$ gpg --list-packets testfile.out.bob.pgp
:pubkey enc packet: version 3, algo 16, keyid 1E894E1BD21A781F
data: [2047 bits]
data: [2048 bits]

You need a passphrase to unlock the secret key for
user: "xxx"
2048-bit ELG-E key, ID D21A781F, created 2013-06-25 (main key ID 1A2AF4DC)

:encrypted data packet:
length: 394
mdc_method: 2
gpg: encrypted with 2048-bit ELG-E key, ID D21A781F, created 2013-06-25
"xxx"
:compressed packet: algo=2
:onepass_sig packet: keyid F5628B474AFF1C2D
version 3, sigclass 0x00, digest 2, pubkey 1, last=1
:literal data packet:
mode b (62), created 1374244412, name="testfile.out.bob",
raw data: 23 bytes
:signature packet: algo 1, keyid F5628B474AFF1C2D
version 3, created 1374244412, md5len 5, sigclass 0x00
digest algo 2, begin of digest 8e 5f
data: [2044 bits]

[vkelman]

Do you know what is causing the first message to be of type PgpOnePassSignatureList instead of PgpLiteralData? Is it because of particular way data was encrypted?

[bhaveshkagrawal]

I am facing same issue, is there any solution ?

[mactenchi]

See changes in my fork: https://github.com/mactenchi/jruby-pgp