| /* |
| * Copyright 2004 The WebRTC Project Authors. All rights reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| // Handling of certificates and keypairs for SSLStreamAdapter's peer mode. |
| |
| #ifndef RTC_BASE_SSL_IDENTITY_H_ |
| #define RTC_BASE_SSL_IDENTITY_H_ |
| |
| #include <stdint.h> |
| #include <ctime> |
| #include <string> |
| |
| namespace rtc { |
| |
| class SSLCertChain; |
| class SSLCertificate; |
| |
| // KT_LAST is intended for vector declarations and loops over all key types; |
| // it does not represent any key type in itself. |
| // KT_DEFAULT is used as the default KeyType for KeyParams. |
| enum KeyType { KT_RSA, KT_ECDSA, KT_LAST, KT_DEFAULT = KT_ECDSA }; |
| |
| static const int kRsaDefaultModSize = 1024; |
| static const int kRsaDefaultExponent = 0x10001; // = 2^16+1 = 65537 |
| static const int kRsaMinModSize = 1024; |
| static const int kRsaMaxModSize = 8192; |
| |
| // Certificate default validity lifetime. |
| static const int kDefaultCertificateLifetimeInSeconds = |
| 60 * 60 * 24 * 30; // 30 days |
| // Certificate validity window. |
| // This is to compensate for slightly incorrect system clocks. |
| static const int kCertificateWindowInSeconds = -60 * 60 * 24; |
| |
| struct RSAParams { |
| unsigned int mod_size; |
| unsigned int pub_exp; |
| }; |
| |
| enum ECCurve { EC_NIST_P256, /* EC_FANCY, */ EC_LAST }; |
| |
| class KeyParams { |
| public: |
| // Generate a KeyParams object from a simple KeyType, using default params. |
| explicit KeyParams(KeyType key_type = KT_DEFAULT); |
| |
| // Generate a a KeyParams for RSA with explicit parameters. |
| static KeyParams RSA(int mod_size = kRsaDefaultModSize, |
| int pub_exp = kRsaDefaultExponent); |
| |
| // Generate a a KeyParams for ECDSA specifying the curve. |
| static KeyParams ECDSA(ECCurve curve = EC_NIST_P256); |
| |
| // Check validity of a KeyParams object. Since the factory functions have |
| // no way of returning errors, this function can be called after creation |
| // to make sure the parameters are OK. |
| bool IsValid() const; |
| |
| RSAParams rsa_params() const; |
| |
| ECCurve ec_curve() const; |
| |
| KeyType type() const { return type_; } |
| |
| private: |
| KeyType type_; |
| union { |
| RSAParams rsa; |
| ECCurve curve; |
| } params_; |
| }; |
| |
| // TODO(hbos): Remove once rtc::KeyType (to be modified) and |
| // blink::WebRTCKeyType (to be landed) match. By using this function in Chromium |
| // appropriately we can change KeyType enum -> class without breaking Chromium. |
| KeyType IntKeyTypeFamilyToKeyType(int key_type_family); |
| |
| // Parameters for generating a certificate. If |common_name| is non-empty, it |
| // will be used for the certificate's subject and issuer name, otherwise a |
| // random string will be used. |
| struct SSLIdentityParams { |
| std::string common_name; |
| time_t not_before; // Absolute time since epoch in seconds. |
| time_t not_after; // Absolute time since epoch in seconds. |
| KeyParams key_params; |
| }; |
| |
| // Our identity in an SSL negotiation: a keypair and certificate (both |
| // with the same public key). |
| // This too is pretty much immutable once created. |
| class SSLIdentity { |
| public: |
| // Generates an identity (keypair and self-signed certificate). If |
| // |common_name| is non-empty, it will be used for the certificate's subject |
| // and issuer name, otherwise a random string will be used. The key type and |
| // parameters are defined in |key_param|. The certificate's lifetime in |
| // seconds from the current time is defined in |certificate_lifetime|; it |
| // should be a non-negative number. |
| // Returns null on failure. |
| // Caller is responsible for freeing the returned object. |
| static SSLIdentity* GenerateWithExpiration(const std::string& common_name, |
| const KeyParams& key_param, |
| time_t certificate_lifetime); |
| static SSLIdentity* Generate(const std::string& common_name, |
| const KeyParams& key_param); |
| static SSLIdentity* Generate(const std::string& common_name, |
| KeyType key_type); |
| |
| // Generates an identity with the specified validity period. |
| // TODO(torbjorng): Now that Generate() accepts relevant params, make tests |
| // use that instead of this function. |
| static SSLIdentity* GenerateForTest(const SSLIdentityParams& params); |
| |
| // Construct an identity from a private key and a certificate. |
| static SSLIdentity* FromPEMStrings(const std::string& private_key, |
| const std::string& certificate); |
| |
| // Construct an identity from a private key and a certificate chain. |
| static SSLIdentity* FromPEMChainStrings(const std::string& private_key, |
| const std::string& certificate_chain); |
| |
| virtual ~SSLIdentity() {} |
| |
| // Returns a new SSLIdentity object instance wrapping the same |
| // identity information. |
| // Caller is responsible for freeing the returned object. |
| // TODO(hbos,torbjorng): Rename to a less confusing name. |
| virtual SSLIdentity* GetReference() const = 0; |
| |
| // Returns a temporary reference to the end-entity (leaf) certificate. |
| virtual const SSLCertificate& certificate() const = 0; |
| // Returns a temporary reference to the entire certificate chain. |
| virtual const SSLCertChain& cert_chain() const = 0; |
| virtual std::string PrivateKeyToPEMString() const = 0; |
| virtual std::string PublicKeyToPEMString() const = 0; |
| |
| // Helpers for parsing converting between PEM and DER format. |
| static bool PemToDer(const std::string& pem_type, |
| const std::string& pem_string, |
| std::string* der); |
| static std::string DerToPem(const std::string& pem_type, |
| const unsigned char* data, |
| size_t length); |
| }; |
| |
| bool operator==(const SSLIdentity& a, const SSLIdentity& b); |
| bool operator!=(const SSLIdentity& a, const SSLIdentity& b); |
| |
| // Convert from ASN1 time as restricted by RFC 5280 to seconds from 1970-01-01 |
| // 00.00 ("epoch"). If the ASN1 time cannot be read, return -1. The data at |
| // |s| is not 0-terminated; its char count is defined by |length|. |
| int64_t ASN1TimeToSec(const unsigned char* s, size_t length, bool long_format); |
| |
| extern const char kPemTypeCertificate[]; |
| extern const char kPemTypeRsaPrivateKey[]; |
| extern const char kPemTypeEcPrivateKey[]; |
| |
| } // namespace rtc |
| |
| #endif // RTC_BASE_SSL_IDENTITY_H_ |