public static byte[] getSignatureKey(string key, string dateStamp, string regionName, string serviceName)
{
byte[] bytes = Encoding.UTF8.GetBytes(("AWS4" + key).ToCharArray());
byte[] key1 = Sigv4.HmacSHA256(dateStamp, bytes);
byte[] key2 = Sigv4.HmacSHA256(regionName, key1);
return(Sigv4.HmacSHA256("aws4_request", Sigv4.HmacSHA256(serviceName, key2)));
}
private void calculate_canon_headers()
{
StringBuilder stringBuilder = new StringBuilder();
foreach (KeyValuePair <string, string> header in this.headers)
{
if (Sigv4.should_include_in_canon_headers(header))
{
stringBuilder.Append(header.Key).Append(":").Append(header.Value).Append("\n");
}
}
this.canon_headers = stringBuilder.ToString();
}
private void calculate_signed_headers()
{
StringBuilder stringBuilder = new StringBuilder();
foreach (KeyValuePair <string, string> header in this.headers)
{
if (Sigv4.should_include_in_canon_headers(header))
{
stringBuilder.Append(header.Key).Append(";");
}
}
stringBuilder.Remove(stringBuilder.Length - 1, 1);
this.signed_headers = stringBuilder.ToString();
}
private void calculate_auth_header()
{
byte[] numArray1 = new byte[32];
byte[] numArray2 = new byte[32];
Sigv4.hmac_sha256(Encoding.Default.GetBytes("AWS4" + this.secret_key), this.date, numArray1);
Sigv4.hmac_sha256(numArray1, this.sig_v4_ctx.region, numArray2);
Sigv4.hmac_sha256(numArray2, this.sig_v4_ctx.service, numArray1);
Sigv4.hmac_sha256(numArray1, "aws4_request", numArray2);
Sigv4.hmac_sha256(numArray2, this.str_to_sign, numArray1);
string str = BitConverter.ToString(numArray1).Replace("-", "");
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.Append("AWS4-HMAC-SHA256").Append(" ").Append("Credential=").Append(this.akid).Append("/").Append(this.credential_scope).Append(", ").Append("SignedHeaders=").Append(this.signed_headers).Append(", ").Append("Signature=").Append(str);
this.auth_header = stringBuilder.ToString();
}
private void calculate_str_to_sign()
{
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.Append("AWS4-HMAC-SHA256").Append("\n").Append(this.date_time).Append("\n").Append(this.credential_scope).Append("\n").Append(Sigv4.sha256_hex(this.canon_request));
this.str_to_sign = stringBuilder.ToString();
}
private void calculate_canon_request()
{
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.Append(this.req.Method()).Append("\n").Append(this.canon_path).Append("\n").Append(this.canon_query_args).Append("\n").Append(this.canon_headers).Append("\n").Append(this.signed_headers).Append("\n").Append(Sigv4.sha256_hex(this.req.data()));
this.canon_request = stringBuilder.ToString();
}