1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef CONSCRYPT_BIO_INPUT_STREAM_H_ 18 #define CONSCRYPT_BIO_INPUT_STREAM_H_ 19 20 #include <jni.h> 21 #include <openssl/ssl.h> 22 23 #include <conscrypt/bio_stream.h> 24 #include <nativehelper/scoped_local_ref.h> 25 26 namespace conscrypt { 27 28 class BioInputStream : public BioStream { 29 public: BioInputStream(jobject stream,bool isFinite)30 BioInputStream(jobject stream, bool isFinite) : BioStream(stream), isFinite_(isFinite) {} 31 read(char * buf,int len)32 int read(char *buf, int len) { 33 return read_internal(buf, len, jniutil::inputStream_readMethod); 34 } 35 gets(char * buf,int len)36 int gets(char *buf, int len) { 37 if (len > PEM_LINE_LENGTH) { 38 len = PEM_LINE_LENGTH; 39 } 40 41 int read = read_internal(buf, len - 1, jniutil::openSslInputStream_readLineMethod); 42 buf[read] = '\0'; 43 JNI_TRACE("BIO::gets \"%s\"", buf); 44 return read; 45 } 46 isFinite()47 bool isFinite() const { 48 return isFinite_; 49 } 50 51 private: 52 const bool isFinite_; 53 read_internal(char * buf,int len,jmethodID method)54 int read_internal(char *buf, int len, jmethodID method) { 55 JNIEnv *env = jniutil::getJNIEnv(); 56 if (env == nullptr) { 57 JNI_TRACE("BioInputStream::read could not get JNIEnv"); 58 return -1; 59 } 60 61 if (env->ExceptionCheck()) { 62 JNI_TRACE("BioInputStream::read called with pending exception"); 63 return -1; 64 } 65 66 ScopedLocalRef<jbyteArray> javaBytes(env, env->NewByteArray(len)); 67 if (javaBytes.get() == nullptr) { 68 JNI_TRACE("BioInputStream::read failed call to NewByteArray"); 69 return -1; 70 } 71 72 jint read = env->CallIntMethod(getStream(), method, javaBytes.get()); 73 if (env->ExceptionCheck()) { 74 JNI_TRACE("BioInputStream::read failed call to InputStream#read"); 75 return -1; 76 } 77 78 /* Java uses -1 to indicate EOF condition. */ 79 if (read == -1) { 80 setEof(true); 81 read = 0; 82 } else if (read > 0) { 83 env->GetByteArrayRegion(javaBytes.get(), 0, read, reinterpret_cast<jbyte *>(buf)); 84 } 85 86 return read; 87 } 88 89 public: 90 /** Length of PEM-encoded line (64) plus CR plus NUL */ 91 static const int PEM_LINE_LENGTH = 66; 92 }; 93 94 } // namespace conscrypt 95 96 #endif // CONSCRYPT_BIO_INPUT_STREAM_H_ 97