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(Mono C#) Walmart Partner API Authentication (Generate a Signature for a Request)Demonstrates how to generate a signature for a Walmart Partner REST API call.
// This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. bool success; string consumerId = "b68d2a72...."; string baseUrl = "https://marketplace.walmartapis.com/v2/feeds"; // This is your Base64 encoded private key string privateEncodedStr = "MIICeAIBADANBgkqhkiG9w0BAQEFAA......"; string httpMethod = "GET"; // We need a timestamp in decimal string form representing the number of milliseconds since Jan 01 1970 UTC. Chilkat.CkDateTime dt = new Chilkat.CkDateTime(); // Set bLocal = true for a timestamp in the local timezone. Set bLocal = false for a UTC timestamp. bool bLocal = false; // This gets the timestamp in seconds, not milliseconds. int timeStampVal = dt.GetAsUnixTime(bLocal); // Build the string to sign. Chilkat.StringBuilder sbStringToSign = new Chilkat.StringBuilder(); sbStringToSign.Append(consumerId); sbStringToSign.Append("\n"); sbStringToSign.Append(baseUrl); sbStringToSign.Append("\n"); sbStringToSign.Append(httpMethod); sbStringToSign.Append("\n"); sbStringToSign.AppendInt(timeStampVal); // We add three zero's so that the timestamp value is in milliseconds. // We don't care about accuracy down to less than a second. // All the server cares about is that the request was signed at the current date/time // within some reasonable margin of error (to account for systems having clocks // that may be slightly different). sbStringToSign.Append("000\n"); Chilkat.PrivateKey privKey = new Chilkat.PrivateKey(); // Load the private key into a private key object. // Note: Technically the private key is not PEM because it lacks the header/footer strings // used for PEM. However, the LoadPem method will still accept it and load it correctly. success = privKey.LoadPem(privateEncodedStr); if (success != true) { Debug.WriteLine(privKey.LastErrorText); return; } Chilkat.Rsa rsa = new Chilkat.Rsa(); success = rsa.ImportPrivateKeyObj(privKey); if (success != true) { Debug.WriteLine(rsa.LastErrorText); return; } // We want a base64 signature string. rsa.EncodingMode = "base64"; string signatureString = rsa.SignStringENC(sbStringToSign.GetAsString(),"SHA256"); if (rsa.LastMethodSuccess != true) { Debug.WriteLine(rsa.LastErrorText); return; } Debug.WriteLine("Signature String: " + signatureString); |
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