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module;

#include <cstdio>

export module mcpplibs.tinyhttps:ca_bundle;

import std;

namespace mcpplibs::tinyhttps {

namespace {

auto read_file(const char* path) -> std::string {

std::FILE* f = std::fopen(path, "rb");

if (f == nullptr) {

return {};

}

std::string result;

char buf[4096];

while (auto n = std::fread(buf, 1, sizeof(buf), f)) {

result.append(buf, n);

}

std::fclose(f);

return result;

}

} // anonymous namespace

export auto load_ca_certs() -> std::string {

// Try known system CA paths

static constexpr const char* ca_paths[] = {

"/etc/ssl/certs/ca-certificates.crt", // Debian/Ubuntu

"/etc/pki/tls/certs/ca-bundle.crt", // RHEL/CentOS

"/etc/ssl/cert.pem", // macOS / general

};

for (auto* path : ca_paths) {

auto pem = read_file(path);

if (!pem.empty()) {

return pem;

}

// No system certs found — return empty.

// A production build could embed a Mozilla CA root bundle here.

return {};

}

} // namespace mcpplibs::tinyhttps

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