| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "Exception.h" |
| #include "ExceptionInternal.h" |
| #include "Hash.h" |
| #include "Token.h" |
| #include "WritableUtils.h" |
| |
| #include <gsasl.h> |
| #include <string> |
| #include <vector> |
| |
| using namespace hdfs::internal; |
| |
| namespace hdfs { |
| namespace internal { |
| |
| static std::string Base64Encode(const char *input, size_t len) { |
| int rc = 0; |
| size_t outLen; |
| char * output = NULL; |
| std::string retval; |
| |
| if (GSASL_OK != (rc = gsasl_base64_to(input, len, &output, &outLen))) { |
| assert(GSASL_MALLOC_ERROR == rc); |
| throw std::bad_alloc(); |
| } |
| |
| assert(NULL != output); |
| retval = output; |
| gsasl_free(output); |
| |
| for (size_t i = 0 ; i < retval.length(); ++i) { |
| switch (retval[i]) { |
| case '+': |
| retval[i] = '-'; |
| break; |
| |
| case '/': |
| retval[i] = '_'; |
| break; |
| |
| case '=': |
| retval.resize(i); |
| break; |
| |
| default: |
| break; |
| } |
| } |
| |
| return retval; |
| } |
| |
| static void Base64Decode(const std::string &urlSafe, |
| std::vector<char> &buffer) { |
| int retval = 0, append = 0; |
| size_t outLen; |
| char * output = NULL; |
| std::string input = urlSafe; |
| |
| for (size_t i = 0; i < input.length(); ++i) { |
| switch (input[i]) { |
| case '-': |
| input[i] = '+'; |
| break; |
| |
| case '_': |
| input[i] = '/'; |
| break; |
| |
| default: |
| break; |
| } |
| } |
| |
| while (true) { |
| retval = gsasl_base64_from(&input[0], input.length(), &output, &outLen); |
| |
| if (GSASL_OK != retval) { |
| switch (retval) { |
| case GSASL_BASE64_ERROR: |
| if (append++ < 2) { |
| input.append("="); |
| continue; |
| } |
| |
| throw std::invalid_argument( |
| "invalid input of gsasl_base64_from"); |
| |
| case GSASL_MALLOC_ERROR: |
| throw std::bad_alloc(); |
| |
| default: |
| assert( |
| false |
| && "unexpected return value from gsasl_base64_from"); |
| } |
| } |
| |
| break; |
| } |
| |
| assert(outLen >= 0); |
| buffer.resize(outLen); |
| memcpy(&buffer[0], output, outLen); |
| gsasl_free(output); |
| } |
| |
| std::string Token::toString() const { |
| try { |
| size_t len = 0; |
| std::vector<char> buffer(1024); |
| WritableUtils out(&buffer[0], buffer.size()); |
| len += out.WriteInt32(identifier.size()); |
| len += out.WriteRaw(&identifier[0], identifier.size()); |
| len += out.WriteInt32(password.size()); |
| len += out.WriteRaw(&password[0], password.size()); |
| len += out.WriteText(kind); |
| len += out.WriteText(service); |
| return Base64Encode(&buffer[0], len); |
| } catch (...) { |
| NESTED_THROW(HdfsIOException, "cannot convert token to string"); |
| } |
| } |
| |
| void Token::fromString(const std::string &str) { |
| int32_t len; |
| |
| try { |
| std::vector<char> buffer; |
| Base64Decode(str, buffer); |
| WritableUtils in(&buffer[0], buffer.size()); |
| len = in.ReadInt32(); |
| identifier.resize(len); |
| in.ReadRaw(&identifier[0], len); |
| len = in.ReadInt32(); |
| password.resize(len); |
| in.ReadRaw(&password[0], len); |
| kind = in.ReadText(); |
| service = in.ReadText(); |
| } catch (...) { |
| NESTED_THROW(HdfsInvalidBlockToken, |
| "cannot construct a token from the string"); |
| } |
| } |
| |
| size_t Token::hash_value() const { |
| size_t values[] = { StringHasher(identifier), StringHasher(password), |
| StringHasher(kind), StringHasher(service) |
| }; |
| return CombineHasher(values, sizeof(values) / sizeof(values[0])); |
| } |
| |
| } |
| } |