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I have an Android client sending RSA-signed messages to an App Engine server using Python and the pycrypto library. The server creates the key pair and sends the private key, encrypted, to the client. I am having trouble unpacking the received key on the Android/Java/client side for use with the signature library. The key, as it is stored looks like this: -----BEGIN PRIVATE KEY----- Proc-Type: 4,ENCRYPTED DEK-Info: DES-EDE3-CBC,9C527448BB17EA68 jodXz..... .....+FxMnI -----END PRIVATE KEY----- This is the sort of thing that hundreds of people must have done already, but the examples I have found fail almost immediately. Any help or guidance would be appreciated.

Charles Libicki
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1 Answers1

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-----BEGIN RSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: DES-EDE3-CBC,9C527448BB17EA68

jodXz..... .....+FxMnI
-----END PRIVATE KEY-----

"DEK-Info" contains information on how the following key data was encrypted: with Triple DES and CBC chaining mode. 9C527448BB17EA68 is input vector. Along with passphrase it allows to decrypt private key data.

Example of Triple DES in Java

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