// Copyright 2014 Google LLC. All rights reserved. // // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file or at // https://developers.google.com/open-source/licenses/bsd // // Defines command line flags for widevine_encryption. #include #include #include #include #include #include #include ABSL_FLAG(bool, enable_widevine_encryption, false, "Enable encryption with Widevine key server. User should provide " "either AES signing key (--aes_signing_key, --aes_signing_iv) or " "RSA signing key (--rsa_signing_key_path)."); ABSL_FLAG(bool, enable_widevine_decryption, false, "Enable decryption with Widevine license server/proxy. User should " "provide either AES signing key (--aes_signing_key, " "--aes_signing_iv) or RSA signing key (--rsa_signing_key_path)."); ABSL_FLAG(std::string, key_server_url, "", "Key server url. Required for encryption and " "decryption"); ABSL_FLAG(shaka::HexBytes, content_id, {}, "Content Id (hex)."); ABSL_FLAG(std::string, policy, "", "The name of a stored policy, which specifies DRM content " "rights."); ABSL_FLAG(int32_t, max_sd_pixels, 768 * 576, "The video track is considered SD if its max pixels per frame is " "no higher than max_sd_pixels. Default: 442368 (768 x 576)."); ABSL_FLAG(int32_t, max_hd_pixels, 1920 * 1080, "The video track is considered HD if its max pixels per frame is " "higher than max_sd_pixels, but no higher than max_hd_pixels. " "Default: 2073600 (1920 x 1080)."); ABSL_FLAG(int32_t, max_uhd1_pixels, 4096 * 2160, "The video track is considered UHD1 if its max pixels per frame " "is higher than max_hd_pixels, but no higher than max_uhd1_pixels." " Otherwise it is UHD2. Default: 8847360 (4096 x 2160)."); ABSL_FLAG(std::string, signer, "", "The name of the signer."); ABSL_FLAG(shaka::HexBytes, aes_signing_key, {}, "AES signing key in hex string. --aes_signing_iv is required. " "Exclusive with --rsa_signing_key_path."); ABSL_FLAG(shaka::HexBytes, aes_signing_iv, {}, "AES signing iv in hex string."); ABSL_FLAG(std::string, rsa_signing_key_path, "", "Stores PKCS#1 RSA private key for request signing. Exclusive " "with --aes_signing_key."); ABSL_FLAG(int32_t, crypto_period_duration, 0, "Crypto period duration in seconds. If it is non-zero, key " "rotation is enabled."); ABSL_FLAG(shaka::HexBytes, group_id, {}, "Identifier for a group of licenses (hex)."); ABSL_FLAG(bool, enable_entitlement_license, false, "Enable entitlement license when using Widevine key server."); namespace shaka { namespace { const bool kOptional = true; } // namespace bool ValidateWidevineCryptoFlags() { bool success = true; const bool widevine_crypto = absl::GetFlag(FLAGS_enable_widevine_encryption) || absl::GetFlag(FLAGS_enable_widevine_decryption); const char widevine_crypto_label[] = "--enable_widevine_encryption/decryption"; // key_server_url and signer (optional) are associated with // enable_widevine_encryption and enable_widevine_descryption. if (!ValidateFlag("key_server_url", absl::GetFlag(FLAGS_key_server_url), widevine_crypto, !kOptional, widevine_crypto_label)) { success = false; } if (!ValidateFlag("signer", absl::GetFlag(FLAGS_signer), widevine_crypto, kOptional, widevine_crypto_label)) { success = false; } if (widevine_crypto && absl::GetFlag(FLAGS_signer).empty() && absl::StartsWith( absl::AsciiStrToLower(absl::GetFlag(FLAGS_key_server_url)), "http")) { LOG(WARNING) << "--signer is likely required with " "--enable_widevine_encryption/decryption."; } const char widevine_encryption_label[] = "--enable_widevine_encryption"; // content_id and policy (optional) are associated with // enable_widevine_encryption. if (!ValidateFlag("content_id", absl::GetFlag(FLAGS_content_id).bytes, absl::GetFlag(FLAGS_enable_widevine_encryption), !kOptional, widevine_encryption_label)) { success = false; } if (!ValidateFlag("policy", absl::GetFlag(FLAGS_policy), absl::GetFlag(FLAGS_enable_widevine_encryption), kOptional, widevine_encryption_label)) { success = false; } if (absl::GetFlag(FLAGS_max_sd_pixels) <= 0) { PrintError("--max_sd_pixels must be positive."); success = false; } if (absl::GetFlag(FLAGS_max_hd_pixels) <= 0) { PrintError("--max_hd_pixels must be positive."); success = false; } if (absl::GetFlag(FLAGS_max_uhd1_pixels) <= 0) { PrintError("--max_uhd1_pixels must be positive."); success = false; } if (absl::GetFlag(FLAGS_max_hd_pixels) <= absl::GetFlag(FLAGS_max_sd_pixels)) { PrintError("--max_hd_pixels must be greater than --max_sd_pixels."); success = false; } if (absl::GetFlag(FLAGS_max_uhd1_pixels) <= absl::GetFlag(FLAGS_max_hd_pixels)) { PrintError("--max_uhd1_pixels must be greater than --max_hd_pixels."); success = false; } const bool aes = !absl::GetFlag(FLAGS_aes_signing_key).bytes.empty() || !absl::GetFlag(FLAGS_aes_signing_iv).bytes.empty(); if (aes && (absl::GetFlag(FLAGS_aes_signing_key).bytes.empty() || absl::GetFlag(FLAGS_aes_signing_iv).bytes.empty())) { PrintError("--aes_signing_key/iv is required if using aes signing."); success = false; } const bool rsa = !absl::GetFlag(FLAGS_rsa_signing_key_path).empty(); if (absl::GetFlag(FLAGS_signer).empty() && (aes || rsa)) { PrintError("--signer is required if using aes/rsa signing."); success = false; } if (!absl::GetFlag(FLAGS_signer).empty() && !aes && !rsa) { PrintError( "--aes_signing_key/iv or --rsa_signing_key_path is required with " "--signer."); success = false; } if (aes && rsa) { PrintError( "Only one of --aes_signing_key/iv and --rsa_signing_key_path should be " "specified."); success = false; } if (absl::GetFlag(FLAGS_crypto_period_duration) < 0) { PrintError("--crypto_period_duration should not be negative."); success = false; } return success; } } // namespace shaka