51 lines
1.2 KiB
Markdown
51 lines
1.2 KiB
Markdown
# [hmac_sha256](https://github.com/h5p9sl/hmac_sha256)
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A SHA256 HMAC implementation in C/C++
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## Example (C++)
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```cpp
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#include "hmac_sha256.h"
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#include <iostream>
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#include <sstream>
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#include <vector>
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#include <string>
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#include <cstring>
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#include <tuple>
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int main(void) {
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const std::string testvector = "b0344c61d8db38535ca8afceafbf12b881dc20c9833da726e9376c2e32cff7";
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std::vector<uint8_t> key, data, out;
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std::stringstream result;
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// Allocate memory
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key.resize(20);
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data.resize(8);
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out.resize(32);
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// Initialize variables
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strncpy((char*)data.data(), "Hi There", data.size());
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memset(key.data(), 0x0b, key.size());
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// Call hmac sha256 function
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hmac_sha256(key.data(), key.size(),
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data.data(), data.size(),
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out.data(), out.size());
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// Convert 'out' to string
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for (unsigned i = 0; i < out.size(); i++) {
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result << std::hex << (int)out[i];
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}
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std::cout << result.str() << std::endl;
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std::cout << testvector << std::endl;
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// Compare result
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if (testvector.compare(result.str()) == 0) {
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std::cout << "Test passed!" << std::endl;
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return 0;
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}
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std::cout << "Test failed." << std::endl;
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return 0;
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}
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```
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