Function PostPresignSignatureV2

pkg/signer/request-signature-v2.go:106–111

PostPresignSignatureV2 - presigned signature for PostPolicy request.

(policyBase64, secretAccessKey string)

// PostPresignSignatureV2 - presigned signature for PostPolicy
// request.
func PostPresignSignatureV2(policyBase64, secretAccessKey string) string {
	hm := hmac.New(sha1.New, []byte(secretAccessKey))
	hm.Write([]byte(policyBase64))
	signature := base64.StdEncoding.EncodeToString(hm.Sum(nil))
	return signature
}

// Authorization = "AWS" + " " + AWSAccessKeyId + ":" + Signature;
// Signature = Base64( HMAC-SHA1( YourSecretAccessKeyID, UTF-8-Encoding-Of( StringToSign ) ) );