Thank you for info, i changed my code to use that build in
template and changed "cast(ubyte[]" to "xxx.representation" and
it is still working:
#!/usr/bin/rdmd -L-lcurl
module sigawsv4;
import std.stdio, std.process;
import std.digest.sha, std.digest.hmac;
import std.string;
import std.conv;
import std.datetime;
import std.net.curl;
void main()
{
auto accessKey = environment["AWS_ACCESS_KEY"];
auto secretKey = environment["AWS_SECRET_KEY"];
auto currentClock = Clock.currTime(UTC());
auto currentDate = cast(Date)currentClock;
auto curDateStr = currentDate.toISOString;
auto currentTime = cast(TimeOfDay)currentClock;
auto curTimeStr = currentTime.toISOString;
auto xamztime = curDateStr ~ "T" ~ curTimeStr ~ "Z";
string method = "GET";
string service = "ec2";
string host = "ec2.amazonaws.com";
string region = "us-east-1";
string endpoint = "https://ec2.amazonaws.com";;
string request_parameters =
"Action=DescribeInstances&Version=2013-10-15";
alias sign = hmac!SHA256;
auto getSignatureKey(string key, string dateStamp, string
regionName, string serviceName)
{
auto kString = ("AWS4" ~ key).representation;
auto kDate = sign(dateStamp.representation, kString);
auto kRegion = sign(regionName.representation, kDate);
auto kService = sign(serviceName.representation, kRegion);
auto kSigning = sign("aws4_request".representation, kService);
return kSigning;
}
string canonicalURI = "/";
string canonicalQueryString = request_parameters;
string canonicalHeadersString = "host:" ~ host ~ "\n" ~
"x-amz-date:" ~ xamztime ~ "\n";
string signedHeaders = "host;x-amz-date";
string payloadHash = sha256Of("").toHexString.toLower;
string canonicalRequest = method ~ "\n" ~ canonicalURI ~ "\n" ~
canonicalQueryString ~ "\n" ~ canonicalHeadersString ~ "\n" ~
signedHeaders ~ "\n" ~ payloadHash;
string algorithm = "AWS4-HMAC-SHA256";
string credentialScope = curDateStr ~ "/" ~ region ~ "/" ~
service ~ "/" ~ "aws4_request";
string stringToSign = algorithm ~ "\n" ~ xamztime ~ "\n" ~
credentialScope ~ "\n" ~
sha256Of(canonicalRequest).toHexString.toLower;
auto signingKey = getSignatureKey(secretKey, curDateStr, region,
service);
string signature = hmac!SHA256(stringToSign.representation,
signingKey).toHexString.toLower;
string authorizationHeader = algorithm ~ " " ~ "Credential=" ~
accessKey ~ "/" ~ credentialScope ~ ", " ~ "SignedHeaders=" ~
signedHeaders ~ ", " ~ "Signature=" ~ signature;
auto client = HTTP(endpoint ~ "?" ~ canonicalQueryString);
client.method = HTTP.Method.get;
client.addRequestHeader("x-amz-date", xamztime);
client.addRequestHeader("Authorization", authorizationHeader);
auto content = client.perform();
writeln(content);
}
