I'm trying to register a webhook for microsoft teams in order to get an update once a message is sent over some chat.
Apparently the way to do that according to 
Now I'm trying to figure out what should go in the encryptionCertificate field but I have failed to find a clear answer in the documentation.
The only thing I figured is that the field contain a base64 encoded "Certificate", which leads me to the same question.
What is this certificate and how do I find it.
Anybody who has some experience with MS APIs or knows anything about that and can help ? Much appreciated guys
Here's also some naive tries that I have attempted and what are their results:
"encryptionCertificate": "YWJjZGVmZw==", resulted in : Certificate validation error: Cannot find the requested object,
"encryptionCertificate": "klsjdaadnkjadn", Certificate validation error: Invalid length for a Base-64 char array or string
"encryptionCertificate": null, , Certificate cannot be empty
CodePudding user response：
encryptionCertificate contains base 64 encoded value of the public key.
The requirements for public key are:
- The key must be of type RSA
- The key size must be between 2048 and 4096 bits
- Export the certificate in base64-encoded X.509 format and include only the public key
For example, by using openssl commands
openssl genrsa -out private.key 1024
openssl req -new -x509 -key private.key -out publickey.cer -days 365
openssl pkcs12 -export -out public_privatekey.pfx -inkey private.key -in publickey.cer
It generates a private key, creates a X509 certificate (.cer file) and exports x509 certificate and private key to a pfx file.
When you create a subscription with encryptionCertificate read the entire publickey.cer file (including the -- Begin certification / End certificate portions) and set base64-encoded content to encryptionCertificate property.
Resources: