Decryption

Decrypting something encrypted to a key in one's secret keyring is fairly straight forward.

In this example code, however, preconfiguring either gpg.Context() or gpg.core.Context() as c is unnecessary because there is no need to modify the Context prior to conducting the decryption and since the Context is only used once, setting it to c simply adds lines for no gain.

import gpg

ciphertext = input("Enter path and filename of encrypted file: ")
newfile = input("Enter path and filename of file to save decrypted data to: ")

with open(ciphertext, "rb") as cfile:
    try:
	plaintext, result, verify_result = gpg.Context().decrypt(cfile)
    except gpg.errors.GPGMEError as e:
	plaintext = None
	print(e)

if plaintext is not None:
    with open(newfile, "wb") as nfile:
	nfile.write(plaintext)
else:
    pass

The data available in plaintext following a successful decryption in this example is the decrypted content as a byte object, the recipient key IDs and algorithms in result and the results of verifying any signatures of the data in verify_result.