net/android/keystore.h

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef NET_ANDROID_KEYSTORE_H
   6 #define NET_ANDROID_KEYSTORE_H
   7
   8 #include <jni.h>
   9
  10 #include <string>
  11 #include <vector>
  12
  13 #include "base/basictypes.h"
  14 #include "base/strings/string_piece.h"
  15 #include "net/base/net_export.h"
  16 #include "net/ssl/ssl_client_cert_type.h"
  17
  18 // Avoid including <openssl/evp.h> here.
  19 typedef struct evp_pkey_st EVP_PKEY;
  20
  21 // Misc functions to access the Android platform KeyStore.
  22
  23 namespace net {
  24 namespace android {
  25
  26 // Define a list of constants describing private key types. The
  27 // values are shared with Java through org.chromium.net.PrivateKeyType.
  28 // Example: PRIVATE_KEY_TYPE_RSA.
  29 enum PrivateKeyType {
  30 #define DEFINE_PRIVATE_KEY_TYPE(name,value)  PRIVATE_KEY_TYPE_ ## name = value,
  31 #include "net/android/private_key_type_list.h"
  32 #undef DEFINE_PRIVATE_KEY_TYPE
  33 };
  34
  35 // Returns the modulus of a given RSAPrivateKey platform object,
  36 // as a series of bytes, in big-endian representation. This can be
  37 // used with BN_bin2bn() to convert to an OpenSSL BIGNUM.
  38 //
  39 // |private_key| is a JNI reference for the private key.
  40 // |modulus| will receive the modulus bytes on success.
  41 // Returns true on success, or false on failure (e.g. if the key
  42 // is not RSA).
  43 NET_EXPORT bool GetRSAKeyModulus(jobject private_key,
  44                                  std::vector<uint8>* modulus);
  45
  46 // Returns the Q parameter of a given DSAPrivateKey platform object,
  47 // as a series of bytes, in big-endian representation. This can be used
  48 // with BN_bin2bn() to convert to an OpenSSL BIGNUM.
  49 // |private_key| is a JNI reference for the private key.
  50 // |q| will receive the result bytes on success.
  51 // Returns true on success, or false on failure (e.g. if the key is
  52 // not DSA).
  53 NET_EXPORT bool GetDSAKeyParamQ(jobject private_key,
  54                                 std::vector<uint8>* q);
  55
  56 // Returns the order parameter of a given ECPrivateKey platform object,
  57 // as a series of bytes, in big-endian representation. This can be used
  58 // with BN_bin2bn() to convert to an OpenSSL BIGNUM.
  59 // |private_key| is a JNI reference for the private key.
  60 // |order| will receive the result bytes on success.
  61 // Returns true on success, or false on failure (e.g. if the key is
  62 // not EC).
  63 bool GetECKeyOrder(jobject private_key,
  64                    std::vector<uint8>* order);
  65
  66 // Returns the encoded PKCS#8 representation of a private key.
  67 // This only works on Android 4.0.3 and older releases for platform keys
  68 // (i.e. all keys except those explicitely generated by the application).
  69 // |private_key| is a JNI reference for the private key.
  70 // |encoded| will receive the encoded data on success.
  71 // Returns true on success, or false on failure (e.g. on 4.0.4 or higher).
  72 bool GetPrivateKeyEncodedBytes(jobject private_key,
  73                                std::vector<uint8>* encoded);
  74
  75 // Compute the signature of a given message, which is actually a hash,
  76 // using a private key. For more details, please read the comments for the
  77 // rawSignDigestWithPrivateKey method in AndroidKeyStore.java.
  78 //
  79 // |private_key| is a JNI reference for the private key.
  80 // |digest| is the input digest.
  81 // |signature| will receive the signature on success.
  82 // Returns true on success, false on failure.
  83 //
  84 NET_EXPORT bool RawSignDigestWithPrivateKey(
  85     jobject private_key,
  86     const base::StringPiece& digest,
  87     std::vector<uint8>* signature);
  88
  89
  90 // Return the PrivateKeyType of a given private key.
  91 // |private_key| is a JNI reference for the private key.
  92 // Returns a PrivateKeyType, while will be CLIENT_CERT_INVALID_TYPE
  93 // on error.
  94 NET_EXPORT PrivateKeyType GetPrivateKeyType(jobject private_key);
  95
  96 // Returns a handle to the system EVP_PKEY object used to back a given
  97 // private_key object. This must *only* be used for RSA private keys
  98 // on Android < 4.2. Technically, this is only guaranteed to work if
  99 // the system image contains a vanilla implementation of the Java
 100 // API frameworks based on Harmony + OpenSSL.
 101 //
 102 // |private_key| is a JNI reference for the private key.
 103 // Returns an EVP_PKEY* handle, or NULL in case of error.
 104 //
 105 // Note: Despite its name and return type, this function doesn't know
 106 //       anything about OpenSSL, it just type-casts a system pointer that
 107 //       is passed as an int through JNI. As such, it never increments
 108 //       the returned key's reference count.
 109 EVP_PKEY* GetOpenSSLSystemHandleForPrivateKey(jobject private_key);
 110
 111 // Register JNI methods
 112 NET_EXPORT bool RegisterKeyStore(JNIEnv* env);
 113
 114 }  // namespace android
 115 }  // namespace net
 116
 117 #endif  // NET_ANDROID_KEYSTORE_H