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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
40 #include "cpl_string.h"
41
42 #include <curl/curl.h>
43 #include <map>
44
45 CPLString CPLGetLowerCaseHexSHA256( const void *pabyData, size_t nBytes );
46 CPLString CPLGetLowerCaseHexSHA256( const CPLString& osStr );
47
48 CPLString CPLGetAWS_SIGN4_Timestamp();
49
50 CPLString CPLAWSURLEncode(const CPLString& osURL, bool bEncodeSlash = true);
51
52 CPLString CPLAWSGetHeaderVal(const struct curl_slist* psExistingHeaders,
53 const char* pszKey);
54
55 CPLString
56 CPLGetAWS_SIGN4_Signature( const CPLString& osSecretAccessKey,
57 const CPLString& osAccessToken,
58 const CPLString& osRegion,
59 const CPLString& osRequestPayer,
60 const CPLString& osService,
61 const CPLString& osVerb,
62 const struct curl_slist* psExistingHeaders,
63 const CPLString& osHost,
64 const CPLString& osCanonicalURI,
65 const CPLString& osCanonicalQueryString,
66 const CPLString& osXAMZContentSHA256,
67 const CPLString& osTimestamp,
68 CPLString& osSignedHeaders );
69
70 CPLString CPLGetAWS_SIGN4_Authorization(const CPLString& osSecretAccessKey,
71 const CPLString& osAccessKeyId,
72 const CPLString& osAccessToken,
73 const CPLString& osRegion,
74 const CPLString& osRequestPayer,
75 const CPLString& osService,
76 const CPLString& osVerb,
77 const struct curl_slist* psExistingHeaders,
78 const CPLString& osHost,
79 const CPLString& osCanonicalURI,
80 const CPLString& osCanonicalQueryString,
81 const CPLString& osXAMZContentSHA256,
82 const CPLString& osTimestamp);
83
84 class IVSIS3LikeHandleHelper
85 {
86 CPL_DISALLOW_COPY_ASSIGN(IVSIS3LikeHandleHelper)
87
88 protected:
89 std::map<CPLString, CPLString> m_oMapQueryParameters{};
90
91 virtual void RebuildURL() = 0;
92 CPLString GetQueryString(bool bAddEmptyValueAfterEqual) const;
93
94 public:
95 IVSIS3LikeHandleHelper() = default;
96 virtual ~IVSIS3LikeHandleHelper() = default;
97
98 void ResetQueryParameters();
99 void AddQueryParameter(const CPLString& osKey, const CPLString& osValue);
100
101 virtual struct curl_slist* GetCurlHeaders(const CPLString& osVerb,
102 const struct curl_slist* psExistingHeaders,
103 const void *pabyDataContent = nullptr,
104 size_t nBytesContent = 0) const = 0;
105
106 virtual bool AllowAutomaticRedirection() { return true; }
107 virtual bool CanRestartOnError(const char*, const char* /* pszHeaders*/,
108 bool /*bSetError*/, bool* /*pbUpdateMap*/ = nullptr) { return false;}
109
110 virtual const CPLString& GetURL() const = 0;
111
112 static bool GetBucketAndObjectKey(const char* pszURI,
113 const char* pszFSPrefix,
114 bool bAllowNoObject,
115 CPLString &osBucketOut,
116 CPLString &osObjectKeyOut);
117
118 static CPLString BuildCanonicalizedHeaders(
119 std::map<CPLString, CPLString>& oSortedMapHeaders,
120 const struct curl_slist* psExistingHeaders,
121 const char* pszHeaderPrefix);
122
123 static CPLString GetRFC822DateTime();
124 };
125
126 class VSIS3HandleHelper final: public IVSIS3LikeHandleHelper
127 {
128 CPL_DISALLOW_COPY_ASSIGN(VSIS3HandleHelper)
129
130 CPLString m_osURL{};
131 CPLString m_osSecretAccessKey{};
132 CPLString m_osAccessKeyId{};
133 CPLString m_osSessionToken{};
134 CPLString m_osEndpoint{};
135 CPLString m_osRegion{};
136 CPLString m_osRequestPayer{};
137 CPLString m_osBucket{};
138 CPLString m_osObjectKey{};
139 bool m_bUseHTTPS = false;
140 bool m_bUseVirtualHosting = false;
141
142 void RebuildURL() override;
143
144 static bool GetConfigurationFromEC2(CPLString& osSecretAccessKey,
145 CPLString& osAccessKeyId,
146 CPLString& osSessionToken);
147
148 static bool GetConfigurationFromAWSConfigFiles(
149 CPLString& osSecretAccessKey,
150 CPLString& osAccessKeyId,
151 CPLString& osSessionToken,
152 CPLString& osRegion,
153 CPLString& osCredentials);
154
155 static bool GetConfiguration(CSLConstList papszOptions,
156 CPLString& osSecretAccessKey,
157 CPLString& osAccessKeyId,
158 CPLString& osSessionToken,
159 CPLString& osRegion);
160 protected:
161
162 public:
163 VSIS3HandleHelper(const CPLString& osSecretAccessKey,
164 const CPLString& osAccessKeyId,
165 const CPLString& osSessionToken,
166 const CPLString& osEndpoint,
167 const CPLString& osRegion,
168 const CPLString& osRequestPayer,
169 const CPLString& osBucket,
170 const CPLString& osObjectKey,
171 bool bUseHTTPS, bool bUseVirtualHosting);
172 ~VSIS3HandleHelper();
173
174 static VSIS3HandleHelper* BuildFromURI(const char* pszURI,
175 const char* pszFSPrefix,
176 bool bAllowNoObject,
177 CSLConstList papszOptions = nullptr);
178 static CPLString BuildURL(const CPLString& osEndpoint,
179 const CPLString& osBucket,
180 const CPLString& osObjectKey,
181 bool bUseHTTPS, bool bUseVirtualHosting);
182
183 struct curl_slist* GetCurlHeaders(
184 const CPLString& osVerb,
185 const struct curl_slist* psExistingHeaders,
186 const void *pabyDataContent = nullptr,
187 size_t nBytesContent = 0) const override;
188
189 bool AllowAutomaticRedirection() override { return false; }
190 bool CanRestartOnError(const char*, const char* pszHeaders,
191 bool bSetError,
192 bool* pbUpdateMap = nullptr) override;
193
194 const CPLString& GetURL() const override { return m_osURL; }
195 const CPLString& GetBucket() const { return m_osBucket; }
196 const CPLString& GetObjectKey() const { return m_osObjectKey; }
197 const CPLString& GetEndpoint()const { return m_osEndpoint; }
198 const CPLString& GetRegion() const { return m_osRegion; }
199 const CPLString& GetRequestPayer() const { return m_osRequestPayer; }
200 bool GetVirtualHosting() const { return m_bUseVirtualHosting; }
201 void SetEndpoint(const CPLString &osStr);
202 void SetRegion(const CPLString &osStr);
203 void SetRequestPayer(const CPLString &osStr);
204 void SetVirtualHosting(bool b);
205
206 CPLString GetSignedURL(CSLConstList papszOptions);
207
208 static void CleanMutex();
209 static void ClearCache();
210 };
211
212 class VSIS3UpdateParams
213 {
214 public:
215 CPLString m_osRegion{};
216 CPLString m_osEndpoint{};
217 CPLString m_osRequestPayer{};
218 bool m_bUseVirtualHosting = false;
219
220 VSIS3UpdateParams() = default;
221
222 explicit VSIS3UpdateParams(const VSIS3HandleHelper* poHelper) :
223 m_osRegion(poHelper->GetRegion()),
224 m_osEndpoint(poHelper->GetEndpoint()),
225 m_osRequestPayer(poHelper->GetRequestPayer()),
226 m_bUseVirtualHosting(poHelper->GetVirtualHosting()) {}
227
228 void UpdateHandlerHelper(VSIS3HandleHelper* poHelper) {
229 poHelper->SetRegion(m_osRegion);
230 poHelper->SetEndpoint(m_osEndpoint);
231 poHelper->SetRequestPayer(m_osRequestPayer);
232 poHelper->SetVirtualHosting(m_bUseVirtualHosting);
233 }
234 };
235
236 #endif /* HAVE_CURL */
237
238 #endif /* #ifndef DOXYGEN_SKIP */
239
240 #endif /* CPL_AWS_INCLUDED_H */
CPLString
Convenient string class based on std::string.
Definition: cpl_string.h:329
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:1194
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:997

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