1 /*
2  * Copyright 2012, 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 BCC_SUPPORT_SHA1_UTIL_H
18 #define BCC_SUPPORT_SHA1_UTIL_H
19 
20 #include <stdint.h>
21 
22 #include <cstddef>
23 
24 // This guard prevents system sha1.h (such as the one in bionic) has been
25 // included before this header.
26 #ifndef SHA1_DIGEST_LENGTH
27 #define SHA1_DIGEST_LENGTH 20
28 #endif
29 
30 namespace bcc {
31 
32 class Sha1Util {
33 private:
34   Sha1Util(); // DISABLED.
35   Sha1Util(Sha1Util &); // DISABLED.
36 
37 public:
38   // Return true on success.
39   static bool GetSHA1DigestFromFile(uint8_t pResult[SHA1_DIGEST_LENGTH],
40                                     const char *pFilename);
41 
42   // Return true on success.
43   static bool GetSHA1DigestFromBuffer(uint8_t pResult[SHA1_DIGEST_LENGTH],
44                                       const uint8_t *pData, size_t pSize);
45 
46   // Useful function when passing buffer of type  "const char *."
GetSHA1DigestFromBuffer(uint8_t pResult[SHA1_DIGEST_LENGTH],const char * pData,size_t pSize)47   static bool GetSHA1DigestFromBuffer(uint8_t pResult[SHA1_DIGEST_LENGTH],
48                                       const char *pData, size_t pSize) {
49     return GetSHA1DigestFromBuffer(pResult,
50                                    reinterpret_cast<const uint8_t*>(pData),
51                                    pSize);
52   }
53 };
54 
55 } // end namespace bcc
56 
57 #endif // BCC_SUPPORT_SHA1_UTIL_H
58