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cpl_aws.h
1 /**********************************************************************
2 * $Id$
3 *
4 * Name: cpl_aws.h
5 * Project: CPL - Common Portability Library
6 * Purpose: Amazon Web Services routines
7 * Author: Even Rouault <even.rouault at spatialys.com>
8 *
9 **********************************************************************
10 * Copyright (c) 2015, Even Rouault <even.rouault at spatialys.com>
11 *
12 * Permission is hereby granted, free of charge, to any person obtaining a
13 * copy of this software and associated documentation files (the "Software"),
14 * to deal in the Software without restriction, including without limitation
15 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
16 * and/or sell copies of the Software, and to permit persons to whom the
17 * Software is furnished to do so, subject to the following conditions:
18 *
19 * The above copyright notice and this permission notice shall be included
20 * in all copies or substantial portions of the Software.
21 *
22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
23 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
25 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
26 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
27 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
28 * DEALINGS IN THE SOFTWARE.
29 ****************************************************************************/
30
31 #ifndef CPL_AWS_INCLUDED_H
32 #define CPL_AWS_INCLUDED_H
33
34 #ifndef DOXYGEN_SKIP
35
36 #ifdef HAVE_CURL
37
38 #include <cstddef>
39 #include <mutex>
40
41 #include "cpl_string.h"
42
43 #include <curl/curl.h>
44 #include <map>
45
46 CPLString CPLGetLowerCaseHexSHA256( const void *pabyData, size_t nBytes );
47 CPLString CPLGetLowerCaseHexSHA256( const CPLString& osStr );
48
49 CPLString CPLGetAWS_SIGN4_Timestamp();
50
51 CPLString CPLAWSURLEncode(const CPLString& osURL, bool bEncodeSlash = true);
52
53 CPLString CPLAWSGetHeaderVal(const struct curl_slist* psExistingHeaders,
54 const char* pszKey);
55
56 CPLString
57 CPLGetAWS_SIGN4_Signature( const CPLString& osSecretAccessKey,
58 const CPLString& osAccessToken,
59 const CPLString& osRegion,
60 const CPLString& osRequestPayer,
61 const CPLString& osService,
62 const CPLString& osVerb,
63 const struct curl_slist* psExistingHeaders,
64 const CPLString& osHost,
65 const CPLString& osCanonicalURI,
66 const CPLString& osCanonicalQueryString,
67 const CPLString& osXAMZContentSHA256,
68 const CPLString& osTimestamp,
69 CPLString& osSignedHeaders );
70
71 CPLString CPLGetAWS_SIGN4_Authorization(const CPLString& osSecretAccessKey,
72 const CPLString& osAccessKeyId,
73 const CPLString& osAccessToken,
74 const CPLString& osRegion,
75 const CPLString& osRequestPayer,
76 const CPLString& osService,
77 const CPLString& osVerb,
78 const struct curl_slist* psExistingHeaders,
79 const CPLString& osHost,
80 const CPLString& osCanonicalURI,
81 const CPLString& osCanonicalQueryString,
82 const CPLString& osXAMZContentSHA256,
83 const CPLString& osTimestamp);
84
85 class IVSIS3LikeHandleHelper
86 {
87 CPL_DISALLOW_COPY_ASSIGN(IVSIS3LikeHandleHelper)
88
89 protected:
90 std::map<CPLString, CPLString> m_oMapQueryParameters{};
91
92 virtual void RebuildURL() = 0;
93 CPLString GetQueryString(bool bAddEmptyValueAfterEqual) const;
94
95 public:
96 IVSIS3LikeHandleHelper() = default;
97 virtual ~IVSIS3LikeHandleHelper() = default;
98
99 void ResetQueryParameters();
100 void AddQueryParameter(const CPLString& osKey, const CPLString& osValue);
101
102 virtual struct curl_slist* GetCurlHeaders(const CPLString& osVerb,
103 const struct curl_slist* psExistingHeaders,
104 const void *pabyDataContent = nullptr,
105 size_t nBytesContent = 0) const = 0;
106
107 virtual bool AllowAutomaticRedirection() { return true; }
108 virtual bool CanRestartOnError(const char*, const char* /* pszHeaders*/,
109 bool /*bSetError*/, bool* /*pbUpdateMap*/ = nullptr) { return false;}
110
111 virtual const CPLString& GetURL() const = 0;
112 CPLString GetURLNoKVP() const;
113
114 virtual CPLString GetCopySourceHeader() const { return std::string(); }
115
116 static bool GetBucketAndObjectKey(const char* pszURI,
117 const char* pszFSPrefix,
118 bool bAllowNoObject,
119 CPLString &osBucketOut,
120 CPLString &osObjectKeyOut);
121
122 static CPLString BuildCanonicalizedHeaders(
123 std::map<CPLString, CPLString>& oSortedMapHeaders,
124 const struct curl_slist* psExistingHeaders,
125 const char* pszHeaderPrefix);
126
127 static CPLString GetRFC822DateTime();
128 };
129
130 class VSIS3HandleHelper final: public IVSIS3LikeHandleHelper
131 {
132 CPL_DISALLOW_COPY_ASSIGN(VSIS3HandleHelper)
133
134 CPLString m_osURL{};
135 mutable CPLString m_osSecretAccessKey{};
136 mutable CPLString m_osAccessKeyId{};
137 mutable CPLString m_osSessionToken{};
138 CPLString m_osEndpoint{};
139 CPLString m_osRegion{};
140 CPLString m_osRequestPayer{};
141 CPLString m_osBucket{};
142 CPLString m_osObjectKey{};
143 bool m_bUseHTTPS = false;
144 bool m_bUseVirtualHosting = false;
145 bool m_bFromEC2 = false;
146
147 void RebuildURL() override;
148
149 static bool GetConfigurationFromEC2(CPLString& osSecretAccessKey,
150 CPLString& osAccessKeyId,
151 CPLString& osSessionToken);
152
153 static bool GetConfigurationFromAWSConfigFiles(
154 CPLString& osSecretAccessKey,
155 CPLString& osAccessKeyId,
156 CPLString& osSessionToken,
157 CPLString& osRegion,
158 CPLString& osCredentials);
159
160 static bool GetConfiguration(CSLConstList papszOptions,
161 CPLString& osSecretAccessKey,
162 CPLString& osAccessKeyId,
163 CPLString& osSessionToken,
164 CPLString& osRegion,
165 bool& bFromEC2);
166 protected:
167
168 public:
169 VSIS3HandleHelper(const CPLString& osSecretAccessKey,
170 const CPLString& osAccessKeyId,
171 const CPLString& osSessionToken,
172 const CPLString& osEndpoint,
173 const CPLString& osRegion,
174 const CPLString& osRequestPayer,
175 const CPLString& osBucket,
176 const CPLString& osObjectKey,
177 bool bUseHTTPS, bool bUseVirtualHosting, bool bFromEC2);
178 ~VSIS3HandleHelper();
179
180 static VSIS3HandleHelper* BuildFromURI(const char* pszURI,
181 const char* pszFSPrefix,
182 bool bAllowNoObject,
183 CSLConstList papszOptions = nullptr);
184 static CPLString BuildURL(const CPLString& osEndpoint,
185 const CPLString& osBucket,
186 const CPLString& osObjectKey,
187 bool bUseHTTPS, bool bUseVirtualHosting);
188
189 struct curl_slist* GetCurlHeaders(
190 const CPLString& osVerb,
191 const struct curl_slist* psExistingHeaders,
192 const void *pabyDataContent = nullptr,
193 size_t nBytesContent = 0) const override;
194
195 bool AllowAutomaticRedirection() override { return false; }
196 bool CanRestartOnError(const char*, const char* pszHeaders,
197 bool bSetError,
198 bool* pbUpdateMap = nullptr) override;
199
200 const CPLString& GetURL() const override { return m_osURL; }
201 const CPLString& GetBucket() const { return m_osBucket; }
202 const CPLString& GetObjectKey() const { return m_osObjectKey; }
203 const CPLString& GetEndpoint()const { return m_osEndpoint; }
204 const CPLString& GetRegion() const { return m_osRegion; }
205 const CPLString& GetRequestPayer() const { return m_osRequestPayer; }
206 bool GetVirtualHosting() const { return m_bUseVirtualHosting; }
207 void SetEndpoint(const CPLString &osStr);
208 void SetRegion(const CPLString &osStr);
209 void SetRequestPayer(const CPLString &osStr);
210 void SetVirtualHosting(bool b);
211
212 CPLString GetCopySourceHeader() const override { return "x-amz-copy-source"; }
213
214 CPLString GetSignedURL(CSLConstList papszOptions);
215
216 static void CleanMutex();
217 static void ClearCache();
218 };
219
220 class VSIS3UpdateParams
221 {
222 public:
223 CPLString m_osRegion{};
224 CPLString m_osEndpoint{};
225 CPLString m_osRequestPayer{};
226 bool m_bUseVirtualHosting = false;
227
228 VSIS3UpdateParams() = default;
229
230 explicit VSIS3UpdateParams(const VSIS3HandleHelper* poHelper) :
231 m_osRegion(poHelper->GetRegion()),
232 m_osEndpoint(poHelper->GetEndpoint()),
233 m_osRequestPayer(poHelper->GetRequestPayer()),
234 m_bUseVirtualHosting(poHelper->GetVirtualHosting()) {}
235
236 void UpdateHandlerHelper(VSIS3HandleHelper* poHelper) {
237 poHelper->SetRegion(m_osRegion);
238 poHelper->SetEndpoint(m_osEndpoint);
239 poHelper->SetRequestPayer(m_osRequestPayer);
240 poHelper->SetVirtualHosting(m_bUseVirtualHosting);
241 }
242
243 static std::mutex gsMutex;
244 static std::map< CPLString, VSIS3UpdateParams > goMapBucketsToS3Params;
245 static void UpdateMapFromHandle( IVSIS3LikeHandleHelper* poHandleHelper );
246 static void UpdateHandleFromMap( IVSIS3LikeHandleHelper* poHandleHelper );
247 static void ClearCache();
248 };
249
250 #endif /* HAVE_CURL */
251
252 #endif /* #ifndef DOXYGEN_SKIP */
253
254 #endif /* CPL_AWS_INCLUDED_H */
CPLString
Convenient string class based on std::string.
Definition: cpl_string.h:332
cpl_string.h
Various convenience functions for working with strings and string lists.
CSLConstList
char ** CSLConstList
Type of a constant null-terminated list of nul terminated strings.
Definition: cpl_port.h:1216
CPL_DISALLOW_COPY_ASSIGN
#define CPL_DISALLOW_COPY_ASSIGN(ClassName)
Helper to remove the copy and assignment constructors so that the compiler will not generate the defa...
Definition: cpl_port.h:1007