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Authentication Method

We utilize the OAuth 2.0 authentication method, an industry standard for authorization, to ensure the security and integrity of user and system identification. This method involves the generation of tokens that allow secure access to our servers, software, and APIs. Authentication through OAuth 2.0 helps prevent cyber fraud and the leakage of confidential information by using public key encryption to validate identities.
1

Creation of Public and Private Keys

Before receiving the credential, it is necessary to generate a pair of keys: one private key and one public key. The private key will be used to sign the token, while the public key should be sent to us to validate the signature of the token.First, generate the private key using the command below via terminal:
openssl genrsa -out private.pem 2048
Next, generate the public key through the terminal:
openssl rsa -in private.pem -pubout > public.pem
Keep the private key in a secure location and never share it.
2

Request for Public Key

We will request your email to open a request regarding the sending of the public key. After that, you will receive a message from notifications@heflo.com with instructions for sending the key.
Send only your public key for validation to our team, responding to the HEFLO request email, without adding other people in copy for security reasons. If other people are copied, it will invalidate the receipt of the public key.
3

Receiving the client_id

After validating your public key, our team will generate and send your client_id, which will be used for authentication in the system.
4

Generating the JWT

Generate a TOKEN following the RS256 standard, containing crucial information such as unique identifier, issuance time, and expiration.
const tokenHeader = {
alg: "RS256", // 'alg': Algorithm used to sign the token (RS256 - RSA with SHA-256).
typ: "JWT"    // 'typ': Type of token, in this case, JWT.
};

const tokenPayload = {
jti: "5e8e07e3-d3f0-4881-a644-0895f4949e9b", // 'jti': Unique ID of the token.
sub: "client_id", // 'sub': Client identifier (fill in with the client_id sent by our team).
iat: 1573648398, // 'iat': Date and time when the token was issued (UNIX timestamp in seconds).
nbf: 1573648398, // 'nbf': Date and time before which the token should not be accepted (UNIX timestamp).
exp: 1573648458, // 'exp': Expiration date of the token (UNIX timestamp).
iss: "client_id", // 'iss': Token issuer (fill in with the client_id sent by our team).
aud: "https://auth.moneyp.dev.br/connect/token" // 'aud': Recipient of the token (verifies if the token is sent to the correct server).
};
5

Bearer Token Generation Endpoint

To generate a TOKEN using the OAuth 2.0 method, the client must send a POST request with the Header Content-Type “application/x-www-form-urlencoded,” below is the CURL of the endpoint that will be used to generate the token:
    curl --location 'https://auth.moneyp.dev.br/connect/token'   --header 'Content-Type: application/x-www-form-urlencoded'   --header 'Cache-Control: no-cache'   --data-urlencode 'grant_type=client_credentials'   --data-urlencode 'client_id=client_id'   --data-urlencode 'scope=bmp.digital.api.full.access'   --data-urlencode 'client_assertion= "<< JWT Token >>"' \ // JWT generated in the previous step.
  --data-urlencode 'client_assertion_type=urn:ietf:params:oauth:client-assertion-type:jwt-bearer'
After authentication, the access token obtained should be used in all subsequent requests in the authorization header.
const headers = {
  Authorization: `Bearer <<Access token>>`
  };
Our Bearer Token, once generated, has a validity of 1 hour. After this period, it will be necessary to generate a new token to ensure the continuity of the session in an active and secure manner.