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[DEV] add API to calculate Sha512 on file

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This commit is contained in:
Edouard DUPIN 2016-12-13 22:58:46 +01:00
parent 89336a6b32
commit f5057e69e1
2 changed files with 41 additions and 2 deletions
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37
algue/sha512.cpp
View File

@ -44,6 +44,7 @@
#include <etk/types.hpp>
#include <algue/sha512.hpp>
#include <algue/debug.hpp>
#include <etk/os/FSNode.hpp>
static const uint32_t ALGUE_SHA384_512_BLOCK_SIZE = (1024/8);
static const uint32_t ALGUE_DIGEST_SIZE = ( 512 / 8);
@ -230,7 +231,39 @@ std::vector<uint8_t> algue::sha512::encode(const uint8_t* _data, int32_t _len) {
std::string algue::stringConvert(std::vector<uint8_t> _data) {
char buf[2*_data.size()+1];
buf[2*_data.size()] = 0;
for (int i = 0; i < _data.size(); i++)
sprintf(buf+i*2, "%02x", _data[i]);
for (size_t iii=0; iii<_data.size(); ++iii) {
sprintf(buf+iii*2, "%02x", _data[iii]);
}
return std::string(buf);
}
std::vector<uint8_t> algue::sha512::encodeFromFile(const std::string& _filename) {
algue::Sha512 ctx;
etk::FSNode node(_filename);
if (node.exist() == 0) {
std::vector<uint8_t> out;
out.resize(ALGUE_DIGEST_SIZE, 0);
return out;
}
if (node.fileSize() == 0) {
std::vector<uint8_t> out;
out.resize(ALGUE_DIGEST_SIZE, 0);
return out;
}
if (node.fileOpenRead() == false) {
std::vector<uint8_t> out;
out.resize(ALGUE_DIGEST_SIZE, 0);
return out;
}
uint32_t bufferSize = 4096;
uint8_t buffer[bufferSize];
while (bufferSize == 4096) {
bufferSize = node.fileRead(buffer, 1, bufferSize);
if (bufferSize != 0) {
ctx.update(buffer, bufferSize);
}
}
node.fileClose();
return ctx.finalize();
}

6
algue/sha512.hpp
View File

@ -11,6 +11,11 @@ namespace algue {
class Sha512 {
public:
Sha512();
/**
* @brief Add data to the sha512 calculation
* @param[in] _data Pointer on the data
* @param[in] _len Lenght of the data to add
*/
void update(const uint8_t* _data, uint32_t _len);
/**
* @brief get digest value
@ -32,6 +37,7 @@ namespace algue {
inline std::vector<uint8_t> encode(const std::string& _data) {
return algue::sha512::encode(reinterpret_cast<const uint8_t*>(&_data[0]), _data.size());
}
std::vector<uint8_t> encodeFromFile(const std::string& _filename);
}
std::string stringConvert(std::vector<uint8_t> _data);
}