Hosting HTTPS website using S3, AMC and CloudFront

Question

I am trying to host a website using S3, ACM, CloudFront and Route53. I am getting access denied when trying to access it. I have done the following steps based on various AWS documentations, AWS blog posts and re:Post but nothing helped. Here are the steps:
1/ Created 2 S3 buckets - example.com and www.example.com. Root bucket is redirecting to www and www bucket has the index.html.
2/ Requested for AMC and added both the domains to it. Added the corresponding CNAMEs to hosted zone. Certificate is issued.
3/ created 2 cloudfront distribution one for www.example.com and one for example.com.
4/ www.example.com config - selected OAC for origin access, updated the www.example.com bucket policy, redirect http to https, attached the certificate.
5/ Added A record for both the distribution in hosted zone.
Did I miss anything?
- I have tried making the www.example.com bucket public and its object public (which is not needed in case of CloudFront) but still got the same error. 
- My S3 buckets are SSE-S3 encrypted.
- Using Static website endpoints
- no explicit deny bucket policy
- Bucket and object owned by same account

Accepted Answer

1. Have you added the Alternative Domain names for your domain to cloudfronts configuration?
2. Have you added access from cloudfront to the bucket Policy?

After Discussion

Your public S3 bucket is not used in this confiuguration and can be disabled.

Update your Root object on the distro to be index.html
https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/DefaultRootObject.html

To perform a redirect you would need to use a Lambda@Edge as your using native S3 origin
https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/example-function-redirect-url.html

Answer

1. Yes, I have added CNAME to the cloudfront distribution
2. While creating the distribution and Origin access control settings, I copied the policy from OAC to the bucket. Here is the copy of the policy:
3. 
{
    "Version": "2012-10-17",
    "Statement": {
        "Sid": "AllowCloudFrontServicePrincipalReadOnly",
        "Effect": "Allow",
        "Principal": {
            "Service": "cloudfront.amazonaws.com"
        },
        "Action": "s3:GetObject",
        "Resource": "arn:aws:s3:::/*",
        "Condition": {
            "StringEquals": {
                "AWS:SourceArn": "arn:aws:cloudfront:::distribution/"
            }
        }
    }
}

Answer

One additional information, not sure if it is helpful but thought to share. I have WAF enabled for my distribution and when I look at the 'Requests processed by AWS WAF for this distribution' I can see all the requests as 'allowed request'.

Hosting HTTPS website using S3, AMC and CloudFront

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