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https://issues.apache.org/jira/browse/HADOOP-13887?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15996504#comment-15996504
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Igor Mazur commented on HADOOP-13887:
-------------------------------------
As I understand, the main problem is that FSInputStream implements Seekable and
PositionedReadable by default. So every other code was written from this
assumption.
Can't evaluate is it a good assumption or not, for all cases :) But looks like
making this part more flexible - is an enormous amount of coding and testing.
So, maybe we need to try another approach - return file as-is from S3 but also
return metadata, that includes a type of encryption and encrypted CEK and
decrypt the file on higher layers. I see classes with names CryptoInputStream,
etc. Haven't looked how they work yet - just idea.
The biggest problem with this approach - is a duplication of
encryption/decryption logic from AWS SDK. Looks like it will be hard to reuse
same classes from SDK - because encryption/decryption tightly linked with
getting/putting objects from S3 there.
> Support for client-side encryption in S3A file system
> -----------------------------------------------------
>
> Key: HADOOP-13887
> URL: https://issues.apache.org/jira/browse/HADOOP-13887
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 2.8.0
> Reporter: Jeeyoung Kim
> Assignee: Igor Mazur
> Priority: Minor
> Attachments: HADOOP-13887-002.patch, HADOOP-13887-007.patch,
> HADOOP-13887-branch-2-003.patch, HADOOP-13897-branch-2-004.patch,
> HADOOP-13897-branch-2-005.patch, HADOOP-13897-branch-2-006.patch,
> HADOOP-13897-branch-2-008.patch, HADOOP-13897-branch-2-009.patch,
> HADOOP-13897-branch-2-010.patch, HADOOP-13897-branch-2-012.patch,
> HADOOP-13897-branch-2-014.patch, HADOOP-13897-trunk-011.patch,
> HADOOP-13897-trunk-013.patch, HADOOP-14171-001.patch
>
>
> Expose the client-side encryption option documented in Amazon S3
> documentation -
> http://docs.aws.amazon.com/AmazonS3/latest/dev/UsingClientSideEncryption.html
> Currently this is not exposed in Hadoop but it is exposed as an option in AWS
> Java SDK, which Hadoop currently includes. It should be trivial to propagate
> this as a parameter passed to the S3client used in S3AFileSystem.java
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