Certificates and secrets sharing to configure multicloud application platform

1. Use AWS Secrets Manager and Azure Key Vault

AWS Secrets Manager: Store your certificates and secrets in AWS Secrets Manager. AWS Secrets Manager provides secure storage, automatic rotation,

and fine-grained access control. Azure Key Vault: Similarly, store your certificates and secrets in Azure Key Vault. Azure Key Vault provides secure key management and automatic rotation.

2. Secure Transmission of Certificates and Secrets

Using AWS Secrets Manager and Azure Key Vault

Export from AWS Secrets Manager:

Retrieve the certificate or secret from AWS Secrets Manager.

Use AWS Key Management Service (KMS) to encrypt the certificate or secret.

Transmit the encrypted certificate or secret to the external organization via a secure channel (e.g., SFTP, HTTPS).

Import into Azure Key Vault:

Receive the encrypted certificate or secret.

Decrypt the certificate or secret using Azure Key Vault’s Key Management features.

Store the decrypted certificate or secret in Azure Key Vault.

Example Script (AWS to Azure)

import boto3
from azure.identity import DefaultAzureCredential
from azure.keyvault.secrets import SecretClient

# AWS Secrets Manager client
aws_secrets_client = boto3.client('secretsmanager')

# Azure Key Vault client
credential = DefaultAzureCredential()
vault_url = "https://<YourKeyVaultName>.vault.azure.net/"
azure_key_vault_client = SecretClient(vault_url=vault_url, credential=credential)

def export_secret_from_aws(secret_name):
    response = aws_secrets_client.get_secret_value(SecretId=secret_name)
    return response['SecretString']

def import_secret_to_azure(secret_name, secret_value):
    azure_key_vault_client.set_secret(secret_name, secret_value)

# Example usage
aws_secret_name = "example-secret"
azure_secret_name = "example-secret"

# Export from AWS Secrets Manager
secret_value = export_secret_from_aws(aws_secret_name)

# Import to Azure Key Vault
import_secret_to_azure(azure_secret_name, secret_value)

Automation and Rotation

Automation: Automate the retrieval, encryption, and transmission processes using AWS Lambda and Azure Functions.

Rotation: Use AWS Secrets Manager’s automatic rotation feature to periodically update secrets. Notify the external organization of changes securely (e.g., via an encrypted email or a secure API).

4. Secure Channels for Transmission SFTP: Use an SFTP server with public key authentication for transferring encrypted files.

HTTPS: Use HTTPS with mutual TLS authentication to ensure data is transmitted securely.

5. Notifications and Monitoring Set up notifications for secret rotation events using AWS SNS (Simple Notification Service) and Azure Monitor.

Monitor access and usage of secrets with AWS CloudWatch and Azure Monitor logs.

Hello,

Please try this solution.

To securely exchange certificates and secrets between AWS and Azure for configuring a multi-cloud application platform with TLS mutual authentication, you can use AWS Secrets Manager and AWS S3. First, store your secrets and certificates in AWS Secrets Manager, which provides encryption and automatic rotation. When you need to share these secrets with the external organization, upload the encrypted files to an S3 bucket with strict access policies and server-side encryption enabled. Then, generate a pre-signed URL for the S3 object, allowing temporary and secure access. Notify the external organization using Amazon SNS, providing the pre-signed URL and necessary decryption instructions. This method ensures that the secrets are securely stored, transferred, and accessed only by authorized parties.

https://medium.com/roofstacks-tech/achieving-multi-cloud-security-integrating-sensitive-data-in-net-c943e15fbdf0