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 #include "bcc/Support/Sha1Util.h" 18 19 #include <sha1.h> 20 21 #include <cstring> 22 23 #include "bcc/Support/Log.h" 24 #include "bcc/Support/InputFile.h" 25 26 using namespace bcc; 27 28 bool Sha1Util::GetSHA1DigestFromFile(uint8_t pResult[SHA1_DIGEST_LENGTH], 29 const char *pFilename) { 30 InputFile file(pFilename); 31 32 if (file.hasError()) { 33 ALOGE("Unable to open the file %s before SHA-1 checksum " 34 "calculation! (%s)", pFilename, file.getErrorMessage().c_str()); 35 return false; 36 } 37 38 SHA1_CTX sha1_context; 39 SHA1Init(&sha1_context); 40 41 char buf[256]; 42 while (true) { 43 ssize_t nread = file.read(buf, sizeof(buf)); 44 45 if (nread < 0) { 46 // Some errors occurred during file reading. 47 return false; 48 } 49 50 SHA1Update(&sha1_context, 51 reinterpret_cast<unsigned char *>(buf), 52 static_cast<unsigned long>(nread)); 53 54 if (static_cast<size_t>(nread) < sizeof(buf)) { 55 break; 56 } 57 } 58 59 SHA1Final(pResult, &sha1_context); 60 61 return true; 62 } 63 64 bool Sha1Util::GetSHA1DigestFromBuffer(uint8_t pResult[SHA1_DIGEST_LENGTH], 65 const uint8_t *pData, size_t pSize) { 66 SHA1_CTX sha1_context; 67 68 SHA1Init(&sha1_context); 69 70 SHA1Update(&sha1_context, 71 reinterpret_cast<const unsigned char *>(pData), 72 static_cast<unsigned long>(pSize)); 73 74 SHA1Final(pResult, &sha1_context); 75 76 return true; 77 } 78
