checkPostPolicy - apply policy conditions and validate input values.

doesPolicySignatureMatch - Verify query headers with post policy - http://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-HTTPPOSTConstructPolicy.html returns true if matches, false otherwise.

doesPresignedSignatureMatch - Verify query headers with presigned signature - http://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-query-string-auth.html returns true if matches, false otherwise.

doesSignatureMatch - Verify authorization header with calculated header in accordance with - http://docs.aws.amazon.com/AmazonS3/latest/API/sig-v4-authenticating-requests.html returns true if matches, false otherwise.

Get request authentication type.

A helper function to verify if request has valid AWS Signature.

List of all supported auth types.

including v2 and v4, handled specially in API endpoint.

List of all supported auth types.

List of all supported auth types.

List of all supported auth types.

List of all supported auth types.

List of all supported auth types.

http Header "x-amz-content-sha256" == "UNSIGNED-PAYLOAD" indicates that the client did not calculate sha256 of the payload.

Convert to Canonical Form before compare.

Convert to Canonical Form before compare.

PostPolicyForm provides strict static type conversion and validation for Amazon S3's POST policy JSON string.

SignVerifyReader represents an io.Reader compatible interface which transparently calculates SHA256 for v4 signed authentication.

Authorization type.