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net/cert: Add SystemTrustStoreStaticUnix
It reads CA certificates from: * The file in environment variable SSL_CERT_FILE * The first available file of /etc/ssl/certs/ca-certificates.crt (Debian/Ubuntu/Gentoo etc.) /etc/pki/tls/certs/ca-bundle.crt (Fedora/RHEL 6) /etc/ssl/ca-bundle.pem (OpenSUSE) /etc/pki/tls/cacert.pem (OpenELEC) /etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem (CentOS/RHEL 7) /etc/ssl/cert.pem (Alpine Linux) * Files in the directory of environment variable SSL_CERT_DIR * Files in the first available directory of /etc/ssl/certs (SLES10/SLES11, https://golang.org/issue/12139) /etc/pki/tls/certs (Fedora/RHEL) /system/etc/security/cacerts (Android)
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klzgrad
parent
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commit
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@ -4,15 +4,19 @@
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#include "net/cert/internal/system_trust_store.h"
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#include <array>
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#include <memory>
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#include <optional>
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#include <vector>
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#include "base/environment.h"
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#include "base/files/file_enumerator.h"
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#include "base/files/file_path.h"
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#include "base/files/file_util.h"
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#include "base/logging.h"
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#include "base/memory/ptr_util.h"
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#include "base/no_destructor.h"
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#include "base/strings/string_split.h"
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#include "base/task/task_traits.h"
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#include "base/task/thread_pool.h"
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#include "base/threading/thread_restrictions.h"
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@ -39,8 +43,8 @@
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#include "third_party/boringssl/src/include/openssl/pool.h"
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#elif BUILDFLAG(IS_WIN)
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#include "net/cert/internal/trust_store_win.h"
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#elif BUILDFLAG(IS_ANDROID)
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#include "net/cert/internal/trust_store_android.h"
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#elif BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_ANDROID)
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#include "base/lazy_instance.h"
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#endif
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#if BUILDFLAG(CHROME_ROOT_STORE_SUPPORTED)
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@ -317,6 +321,147 @@ std::unique_ptr<SystemTrustStore> CreateSslSystemTrustStore() {
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return std::make_unique<SystemTrustStoreFuchsia>();
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}
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#elif BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_ANDROID)
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namespace {
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// Copied from https://golang.org/src/crypto/x509/root_linux.go
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// Possible certificate files; stop after finding one.
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constexpr std::array<const char*, 6> kStaticRootCertFiles = {
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"/etc/ssl/certs/ca-certificates.crt", // Debian/Ubuntu/Gentoo etc.
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"/etc/pki/tls/certs/ca-bundle.crt", // Fedora/RHEL 6
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"/etc/ssl/ca-bundle.pem", // OpenSUSE
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"/etc/pki/tls/cacert.pem", // OpenELEC
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"/etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem", // CentOS/RHEL 7
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"/etc/ssl/cert.pem", // Alpine Linux
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};
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// Possible directories with certificate files; stop after successfully
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// reading at least one file from a directory.
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constexpr std::array<const char*, 3> kStaticRootCertDirs = {
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"/etc/ssl/certs", // SLES10/SLES11, https://golang.org/issue/12139
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"/etc/pki/tls/certs", // Fedora/RHEL
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"/system/etc/security/cacerts", // Android
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};
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// The environment variable which identifies where to locate the SSL
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// certificate file. If set this overrides the system default.
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constexpr char kStaticCertFileEnv[] = "SSL_CERT_FILE";
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// The environment variable which identifies which directory to check for SSL
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// certificate files. If set this overrides the system default. It is a colon
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// separated list of directories.
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// See https://www.openssl.org/docs/man1.0.2/man1/c_rehash.html.
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constexpr char kStaticCertDirsEnv[] = "SSL_CERT_DIR";
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class TrustStoreUnix : public PlatformTrustStore {
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public:
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TrustStoreUnix() {
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auto env = base::Environment::Create();
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std::string env_value;
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std::vector<std::string> cert_filenames(kStaticRootCertFiles.begin(),
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kStaticRootCertFiles.end());
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if (env->GetVar(kStaticCertFileEnv, &env_value) && !env_value.empty()) {
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cert_filenames = {env_value};
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}
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bool cert_file_ok = false;
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for (const auto& filename : cert_filenames) {
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std::string file;
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if (!base::ReadFileToString(base::FilePath(filename), &file))
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continue;
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if (AddCertificatesFromBytes(file, trust_store_)) {
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cert_file_ok = true;
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break;
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}
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}
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std::vector<std::string> cert_dirnames(kStaticRootCertDirs.begin(),
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kStaticRootCertDirs.end());
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if (env->GetVar(kStaticCertDirsEnv, &env_value) && !env_value.empty()) {
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cert_dirnames = base::SplitString(env_value, ":", base::TRIM_WHITESPACE,
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base::SPLIT_WANT_NONEMPTY);
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}
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bool cert_dir_ok = false;
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for (const auto& dir : cert_dirnames) {
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base::FileEnumerator e(base::FilePath(dir),
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/*recursive=*/true, base::FileEnumerator::FILES);
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for (auto filename = e.Next(); !filename.empty(); filename = e.Next()) {
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std::string file;
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if (!base::ReadFileToString(filename, &file)) {
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continue;
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}
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if (AddCertificatesFromBytes(file, trust_store_)) {
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cert_dir_ok = true;
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}
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}
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if (cert_dir_ok)
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break;
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}
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if (!cert_file_ok && !cert_dir_ok) {
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LOG(ERROR) << "No CA certificates were found. Try using environment "
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"variable SSL_CERT_FILE or SSL_CERT_DIR";
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}
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}
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TrustStoreUnix(const TrustStoreUnix&) = delete;
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TrustStoreUnix& operator=(const TrustStoreUnix&) = delete;
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// bssl::CertIssuerSource implementation:
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void SyncGetIssuersOf(const bssl::ParsedCertificate* cert,
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bssl::ParsedCertificateList* issuers) override {
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trust_store_.SyncGetIssuersOf(cert, issuers);
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}
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// bssl::TrustStore implementation:
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bssl::CertificateTrust GetTrust(
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const bssl::ParsedCertificate* cert) override {
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return trust_store_.GetTrust(cert);
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}
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// net::PlatformTrustStore implementation:
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std::vector<net::PlatformTrustStore::CertWithTrust> GetAllUserAddedCerts()
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override {
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return {};
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}
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private:
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static bool AddCertificatesFromBytes(std::string_view data,
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bssl::TrustStoreInMemory& store) {
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auto certs = X509Certificate::CreateCertificateListFromBytes(
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base::as_bytes(base::make_span(data)), X509Certificate::FORMAT_AUTO);
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bool certs_ok = false;
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for (const auto& cert : certs) {
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bssl::CertErrors errors;
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auto parsed = bssl::ParsedCertificate::Create(
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bssl::UpRef(cert->cert_buffer()),
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x509_util::DefaultParseCertificateOptions(), &errors);
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if (parsed) {
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if (!store.Contains(parsed.get())) {
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store.AddTrustAnchor(parsed);
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}
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certs_ok = true;
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} else {
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LOG(ERROR) << errors.ToDebugString();
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}
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}
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return certs_ok;
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}
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bssl::TrustStoreInMemory trust_store_;
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};
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} // namespace
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std::unique_ptr<SystemTrustStore> CreateSslSystemTrustStoreChromeRoot(
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std::unique_ptr<TrustStoreChrome> chrome_root) {
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return std::make_unique<SystemTrustStoreChrome>(
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std::move(chrome_root), std::make_unique<TrustStoreUnix>());
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}
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#elif BUILDFLAG(IS_WIN)
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namespace {
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