cosmium/internal/authentication/authentication.go
2024-02-21 23:40:54 +02:00

27 lines
692 B
Go

package authentication
import (
"crypto/hmac"
"crypto/sha256"
"encoding/base64"
"fmt"
"strings"
)
// https://learn.microsoft.com/en-us/rest/api/cosmos-db/access-control-on-cosmosdb-resources
func GenerateSignature(verb string, resourceType string, resourceId string, date string, masterKey string) string {
payload := fmt.Sprintf(
"%s\n%s\n%s\n%s\n%s\n",
strings.ToLower(verb),
strings.ToLower(resourceType),
resourceId,
strings.ToLower(date),
"")
masterKeyBytes, _ := base64.StdEncoding.DecodeString(masterKey)
hash := hmac.New(sha256.New, masterKeyBytes)
hash.Write([]byte(payload))
signature := base64.StdEncoding.EncodeToString(hash.Sum(nil))
return signature
}