Encryption Mechanism:

The payload of the supported APIs is encrypted with the following method. We use AES-512 & RSA for encryption of the payload.

Summary of Steps:

1.) Take the valid JSON payload. an An example is given below.:

Sample Example:

{
	"api-version": "<1.0 or TEST>",
	"security-id": "<64 character alphanumeric>",
	"flow-id": "<8 character alphanumeric>",
	"calls": [
		{
			"client-identifier": "<identifier, callback parameter>",
			"start-time": "<ISO-8601 Format YYYY-MM-DDTHH:MM:SS+05:30",
			"contact-numbers": [
				"918000XXXXXX",
				"918100XXXXXX",
				"<Other Alternate Numbers>"
			],
			"keys": [
				{
					"name": "$flow.key.Name",
					"value": "JACOB"
				},
				{
					"name": "$flow.key.Language",
					"value": "English"
				},
				{
					// Other flow variables
				}
			]
		},
		{
			// 2nd Call to be place
		}
	]
}

...

Use the following link to encode https://www.base64decodebase64encode.org/

IHsKICAidmlzaXRvciI6ICI5MTk4Nzk1ODU3MDAiLAogICJjdXN0VG9rZW4iOiAidTFkOXowM2IiLAogICJkdXJhdGlvbiI6ICI5MDAiLAogICJzY2hlZHVsZWRfY2FsbGJhY2tfdGltZSI6ICIyMDIxLTAzLTI3IDEyOjAwOjAwIiwKICAidWRmNSI6ICJST1NTRSIsCiAgInVkZjciOiAiU0NIRU1FTkFNRVNXSVRDSCBJTiIsCiAgInVkZjExIjogInBhZ2U7Uk9TU0lEO0lOVkVTVE9STkFNRTtTQ0hFTUVOQU1FO0FNT1VOVDtVTklUUztFWElUTE9BREFNVDtPdGhlcmRldGFpbHM7Rm9saW8gY291bnQ7RGV0YWlscztSZWRlbXB0aW9uZm9saW9jb3VudDtTd2l0Y2hmb2xpb2NvdW50IiwKICAidWRmMTIiOiAiUmVhc29uO0ZPTElPTk87Q1JFQVRFRE9OIiwKfQ==

3.) Take a random string (ex: abcd1234) of up to 2048 characters to be used as the signature key, and encode this string also using Base64 encoding.

Random Key : test1234
Base64 Encoded : : dGVzdDEyMzQ=

Now, You have two encoded values, the first First one is your Base64 encode JSON payload and the second Second one is your encoded random string.

4.) You will have to write your own code for AES Encryption of your Base64 encoded JSON payload and a random string. For AES Encryption you can refer to the link below to write your code.

...

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

...

...

For AES encryption you can take reference from the given link :

...

https://www.javainterviewpoint.com/rsa-encryption-and-decryption/

...

7.) Send both “RequestEncryptedValue” and “RequestDigitalSignatureValue” as parameters to the encrypted API.

...

{
"RequestEncryptedValue":"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",
"RequestDigitalSignatureValue":"VZATnCid3xMId80c4NVx365ubTYEEOE7y/3/sEjgKpWHyVsZmtuTuLC8ohdgunFmT8SsAYZtGydhKH9LJG6PwmYBCb+DNxdXnZ3Vrg+V+m/uA0tFp1CarEr5J5fMqN5fO9Qyb82JKk5ZamVmv0NRlMXxBi7S1hT0b85ZrpKaIX2OP6rYnDVeXDwIObj1XzvUna+sidbkHNeFJ+/m7xJONOof8Mv2FtAh65JWW/mdUzRbFCv/lBNHO7P6j6E1wNAE8UUgR7WrPusYlaw0S76yGo5p2r+mlG5/hZZMVU3ZUJvm4rP++tiZFuz1mpGjm4g2eUv6ugJ7fPyKSiFySNgX7g==",

"flow-id": "ZH0RKJvh"
}

8. Response

You’ll be getting the general response that you get from either API.

{
  "api-response-code": 200,
  "api-response-message": "Success",
  "request-id": "367a25ec-065b-4ca7-a73f-70d1da818a22",
  "call-details": [
    {
      "client-identifier": "2021-05-17T05:47:30.536Z",
      "phonon-uuid": "6a79da04-cf07-4c42-973f-998ea3380708"
    }
  ]
}

...