http_aws_sigv4.h

#ifndef SOURCEMETA_CORE_HTTP_AWS_SIGV4_H_
#define SOURCEMETA_CORE_HTTP_AWS_SIGV4_H_
 
#ifndef SOURCEMETA_CORE_HTTP_EXPORT
#include <sourcemeta/core/http_export.h>
#endif
 
#include <array>       // std::array
#include <cstdint>     // std::uint8_t
#include <span>        // std::span
#include <string>      // std::string
#include <string_view> // std::string_view
#include <utility>     // std::pair
 
namespace sourcemeta::core {

struct HTTPAWSCredentials {
  std::string_view access_key_id;
  std::string_view secret_access_key;
  std::string_view session_token;
};

auto SOURCEMETA_CORE_HTTP_EXPORT http_aws_sigv4_canonical_request(
    const std::string_view method, const std::string_view path,
    const std::string_view query,
    const std::span<const std::pair<std::string_view, std::string_view>>
        headers,
    const std::string_view payload_hash, const bool normalize = true)
    -> std::string;

auto SOURCEMETA_CORE_HTTP_EXPORT http_aws_sigv4_signed_headers(
    const std::span<const std::pair<std::string_view, std::string_view>>
        headers) -> std::string;

auto SOURCEMETA_CORE_HTTP_EXPORT http_aws_sigv4_credential_scope(
    const std::string_view date, const std::string_view region,
    const std::string_view service) -> std::string;

auto SOURCEMETA_CORE_HTTP_EXPORT http_aws_sigv4_string_to_sign(
    const std::string_view amz_date, const std::string_view scope,
    const std::string_view canonical_request) -> std::string;

auto SOURCEMETA_CORE_HTTP_EXPORT http_aws_sigv4_signing_key(
    const std::string_view secret, const std::string_view date,
    const std::string_view region, const std::string_view service)
    -> std::array<std::uint8_t, 32>;

auto SOURCEMETA_CORE_HTTP_EXPORT
http_aws_sigv4_signature(const std::array<std::uint8_t, 32> &signing_key,
                         const std::string_view string_to_sign) -> std::string;

auto SOURCEMETA_CORE_HTTP_EXPORT http_aws_sigv4_authorization(
    const std::string_view access_key_id, const std::string_view scope,
    const std::string_view signed_headers, const std::string_view signature)
    -> std::string;
 
} // namespace sourcemeta::core
 
#endif