generateNonceString function
Implementation
String generateNonceString() {
String chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
String nonce = '';
for (int i = 1; i <= 32; i++) {
int pos = DateTime.now().microsecondsSinceEpoch % chars.length;
String char = chars[pos];
nonce += char;
}
return nonce;
}