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_BIOINPUTSTREAM_H_ 18 #define CONSCRYPT_BIOINPUTSTREAM_H_ 19 20 #include <jni.h> 21 #include <openssl/ssl.h> 22 23 #include "BioStream.h" 24 25 namespace conscrypt { 26 27 class BioInputStream : public BioStream { 28 public: BioInputStream(jobject stream,bool isFinite)29 BioInputStream(jobject stream, bool isFinite) : BioStream(stream), isFinite_(isFinite) {} 30 read(char * buf,int len)31 int read(char *buf, int len) { 32 return read_internal(buf, len, JniConstants::inputStream_readMethod); 33 } 34 gets(char * buf,int len)35 int gets(char *buf, int len) { 36 if (len > PEM_LINE_LENGTH) { 37 len = PEM_LINE_LENGTH; 38 } 39 40 int read = read_internal(buf, len - 1, JniConstants::openSslInputStream_readLineMethod); 41 buf[read] = '\0'; 42 JNI_TRACE("BIO::gets \"%s\"", buf); 43 return read; 44 } 45 isFinite()46 bool isFinite() const { 47 return isFinite_; 48 } 49 50 private: 51 const bool isFinite_; 52 read_internal(char * buf,int len,jmethodID method)53 int read_internal(char *buf, int len, jmethodID method) { 54 JNIEnv *env = JniConstants::getJNIEnv(); 55 if (env == nullptr) { 56 JNI_TRACE("BioInputStream::read could not get JNIEnv"); 57 return -1; 58 } 59 60 if (env->ExceptionCheck()) { 61 JNI_TRACE("BioInputStream::read called with pending exception"); 62 return -1; 63 } 64 65 ScopedLocalRef<jbyteArray> javaBytes(env, env->NewByteArray(len)); 66 if (javaBytes.get() == nullptr) { 67 JNI_TRACE("BioInputStream::read failed call to NewByteArray"); 68 return -1; 69 } 70 71 jint read = env->CallIntMethod(getStream(), method, javaBytes.get()); 72 if (env->ExceptionCheck()) { 73 JNI_TRACE("BioInputStream::read failed call to InputStream#read"); 74 return -1; 75 } 76 77 /* Java uses -1 to indicate EOF condition. */ 78 if (read == -1) { 79 setEof(true); 80 read = 0; 81 } else if (read > 0) { 82 env->GetByteArrayRegion(javaBytes.get(), 0, read, reinterpret_cast<jbyte *>(buf)); 83 } 84 85 return read; 86 } 87 88 public: 89 /** Length of PEM-encoded line (64) plus CR plus NUL */ 90 static const int PEM_LINE_LENGTH = 66; 91 }; 92 93 } // namespace conscrypt 94 95 #endif // CONSCRYPT_BIOINPUTSTREAM_H_ 96