fix: Handle errors when decrypting multiple EDKs with raw RSA MKPs by lucasmcdonald3 · Pull Request #672 · aws/aws-encryption-sdk-python (original) (raw)

Issue #, if available:

Description of changes:

Catch a ValueError thrown by cryptography if the master key provider cannot decrypt the EDK, and surface it as a IncorrectMasterKeyError.

From MKP Decrypt Data Key spec:

"The master key provider SHOULD attempt to decrypt the data key by passing the request to any master keys that it has access to until it has either exhausted available master keys or obtained a plaintext data key."

Surfacing the ValueError as an IncorrectMasterKeyError lets this logic swallow the exception, and try to decrypt other data keys from the encrypted data key list.

This is extremely similar to this previous issue, except with raw RSA keys instead of KMSMasterKeys.

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