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chore: avoid deprecated funcs to calculate sha256

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Signed-off-by: Federico Aponte <federico.aponte@sysdig.com>
This commit is contained in:
Federico Aponte 2025-01-07 17:46:32 +01:00 committed by poiana
parent 3277d6e00b
commit ec2c2e801e
1 changed files with 10 additions and 10 deletions
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20
userspace/engine/falco_utils.cpp
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@ -23,7 +23,7 @@ limitations under the License.
#include <re2/re2.h>
#if defined(__linux__) and !defined(MINIMAL_BUILD) and !defined(__EMSCRIPTEN__)
#include <openssl/sha.h>
#include <openssl/evp.h>
#endif
#include <cstring>
#include <fstream>
@ -144,22 +144,22 @@ std::string calculate_file_sha256sum(const std::string& filename) {
return "";
}
SHA256_CTX sha256_context;
SHA256_Init(&sha256_context);
std::unique_ptr<EVP_MD_CTX, decltype(&EVP_MD_CTX_free)> ctx(EVP_MD_CTX_new(), EVP_MD_CTX_free);
EVP_DigestInit_ex(ctx.get(), EVP_sha256(), nullptr);
constexpr size_t buffer_size = 4096;
char buffer[buffer_size];
while(file.read(buffer, buffer_size)) {
SHA256_Update(&sha256_context, buffer, buffer_size);
EVP_DigestUpdate(ctx.get(), buffer, buffer_size);
}
SHA256_Update(&sha256_context, buffer, file.gcount());
EVP_DigestUpdate(ctx.get(), buffer, file.gcount());
unsigned char digest[SHA256_DIGEST_LENGTH];
SHA256_Final(digest, &sha256_context);
std::vector<uint8_t> digest(EVP_MD_size(EVP_sha256()));
EVP_DigestFinal_ex(ctx.get(), digest.data(), nullptr);
std::stringstream ss;
for(int i = 0; i < SHA256_DIGEST_LENGTH; ++i) {
ss << std::hex << std::setw(2) << std::setfill('0') << static_cast<unsigned>(digest[i]);
std::ostringstream ss;
for(auto& c : digest) {
ss << std::hex << std::setw(2) << std::setfill('0') << (int)c;
}
return ss.str();
}