BouncyCastle updated pgp key now getting checksum mismatch error

encryption bouncycastle checksum pgp openpgp
user1161505 picture user1161505 · Dec 3, 2015 · Viewed 9.7k times · Source

I have a utility that is using the BouncyCastle.Crypto dll (version 1.7.4, runtime version 1.1.4), in order to decrypt a file that is given to it by another system.

I just updated the pgp key (and provided the encryptor with the new public key). The new key uses 4096 bit RSA encryption and has a 24 character password, which are the only differences I can think of between the new key and the old key. The old key used I believe 2048 bit encryption with a 7 character password.

When I attempt to decrypt a file the process is now failing when calling the PgpSecretKey.ExtractPrivateKey(char[] passPhrase) function, provided by BouncyCastle. The error is "Checksum mismatch at 0 of 20." The weird part is that the first time I tested it worked fine, then with no changes it began failing. I have tried with multiple encrypted files.

Since it's such an old version of BouncyCastle and this particular permutation of the ExtractPrivateKey function is no longer in use I am finding it difficult to locate relevant information. Any thoughts are appreciated.

Answer

user5178129 picture user5178129 · Jun 14, 2016

I got that error once "Checksum mismatch at 0 of 20." . My issue was due to a wrong pass phrase. Hope this should help someone.

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