This proxy allows any application supporting HTTP proxies to access files in a private S3 bucket (upload or download). The authorization headers are only sent if the proxy detects a S3 URL (of the form *.s3.amazonaws.com/*). Multiple buckets can be configured with different settings.

The proxy supports fetching tokens from an IAM role, so you don't have to store the keys in clear text in the configuration file when running on an EC2 instance with a properly configured role.

Transparent client-side AES encryption is supported. The size of your encryption key (16, 24, or 32 characters) will determine whether 128, 192 or 256 bit encryption is used. When encryption is used, files are encrypted on the fly during upload, and decrypted during download. Encryption keys are defined per bucket.

The difference between client side encryption and the server side encryption also available in S3 is that with client side encryption, you keys are never stored on Amazon servers.

You'll need Go 1.1 to compile s3proxy. Note that the Go tools are only needed for compiling s3proxy, the resulting binary does not depend on any external libraries.

• Export GOPATH to the root directory of s3proxy
• Run go install s3proxy

You should now have a s3proxy binary in bin/s3proxy

• Copy config.json.dist to a file somewhere and edit the values inside
• Start the proxy, passing the path to the config file as the only command line parameter

• Support wildcards in bucket configurations?