encrypt-decrypt | Java、Go、Python、NodeJS、PHP、JavaScript AES/CBC/PKCS7Padding 加解密 | Encryption library

The best and most portable way to clear the stdin is using this:

I tried in my system able to get token encrypt and decrypt blob

try with giving Get permission

OUTPUT:

• In the ‘encryptionusage.py’ script that you have used for using the client-side encryption in azure blob storage in python, the ‘KEK’, i.e., the key encryption key or the wrapper key encryption algorithm is mentioned as ‘A256KW’ as in below snapshot which is a key wrapping encryption algorithm that uses a AES256 bit key.

• The output of A256KW algorithm is as follows from which the details of the ‘CEK, i.e., Content Encryption Key’ are extracted which was used to encrypt the contents of the azure blob storage and was stored in Azure Key vault.

‘eyJhbGciOiJBMjU2S1ciLCJlbmMiOiJBMjU2R0NNIn0.66xZoxFI18zfvLMO6WU1zzqqX1tT8xu_qZzMQyPcfVuajPNkOJUXQA.X5ZL8yaOektXmfny.brz-Lg.xG-EvM-9hrw0XRiuRW7HrA’ --> output of A256KW algorithm through which the CEK will be extracted.

I tried to reproduce the scenario in my system .Not facing the error that you are getting .I passed the credentials directly instead of reading them from app.config.I think issue with reading credentials from app.config Pass the credentials directly.

OUTPUT

Try using Azure Storage Client Library for Python supports encrypting data within client applications before uploading to Azure Storage, and decrypting data while downloading to the client.

Use the Encryption via the envelope technique contains the following steps

1) The Azure storage client library generates a content encryption key (CEK), which is a one-time-use symmetric key.

2) User data is encrypted using this content encryption key (CEK)

3) The CEK is then wrapped (encrypted) using the key encryption key (KEK). The KEK is identified by a key identifier and can be an asymmetric key pair or a symmetric key, which is managed locally. The storage client library itself never has access to KEK. The library invokes the key wrapping algorithm that is provided by the KEK. Users can choose to use custom providers for key wrapping/unwrapping if desired

4) The encrypted data is then uploaded to the Azure Storage service. The wrapped key along with some additional encryption metadata is either stored as metadata (on a blob) or interpolated with the encrypted data (queue messages and table entities).

Decryption via the envelope technique: contains the following steps

1) The client library assumes that the user is managing the key encryption key (KEK) locally. The user does not need to know the specific key that was used for encryption. Instead, a key resolver, which resolves different key identifiers to keys, can be set up and used.

2) The client library downloads the encrypted data along with any encryption material that is stored on the service

3) The wrapped content encryption key (CEK) is then unwrapped (decrypted) using the key encryption key (KEK). Here again, the client library does not have access to KEK. It simply invokes the custom provider's unwrapping algorithm

4) The content encryption key (CEK) is then used to decrypt the encrypted user data.

For more details and step by step procedure refer this document

The reason is you are using StreamWriter, which is intended to write text into the stream, but then you write raw bytes there:

If you want encrypted data to be sent as a form data you would need to send it as dictionary where actual encrypted data is a value.

End-user was using an older version of OpenSSL on their side and that seems like to have caused this password related problem during decryption i.e. if a file is created using the above way using OpenSSL version X and if you try to decrypt it using OpenSSL version Y, then this issue comes.

After end-user installed the same OpenSSL version (or possibly a newer version than mine would resolve as well), the issue went away.

The issue was resolved after installing the following OpenSSL version on their Linux machine.

I write a simple demo for you. Just try the C# console app below about azure blob client-encryption with azure KeyVault: