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common: update sha256sum to use OpenSSL 3.0 API

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As of OpenSSL 3.0, `SHA256_Init`, `SHA256_Update`, and `SHA256_Final`
are deprectaed in favor of the higher-level `EVP_*` class of functions.
This causes compiler warnings, and sooner or later, will cause build
errors as these functions are excluded from distro headers.

Also add some documentation.
This commit is contained in:
Jeffrey Ryan
2022-05-17 22:40:36 +02:00
committed by selsta
parent 6e60919e6d
commit a66a52d144
2 changed files with 26 additions and 13 deletions
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19
src/common/util.cpp
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@@ -85,7 +85,7 @@ using namespace epee;
#include <boost/algorithm/string.hpp>
#include <boost/asio.hpp>
#include <boost/format.hpp>
#include <openssl/sha.h>
#include <openssl/evp.h>
#undef MONERO_DEFAULT_LOG_CATEGORY
#define MONERO_DEFAULT_LOG_CATEGORY "util"
@@ -941,14 +941,7 @@ std::string get_nix_version_display_string()
bool sha256sum(const uint8_t *data, size_t len, crypto::hash &hash)
{
SHA256_CTX ctx;
if (!SHA256_Init(&ctx))
return false;
if (!SHA256_Update(&ctx, data, len))
return false;
if (!SHA256_Final((unsigned char*)hash.data, &ctx))
return false;
return true;
return EVP_Digest(data, len, (unsigned char*) hash.data, NULL, EVP_sha256(), NULL) != 0;
}
bool sha256sum(const std::string &filename, crypto::hash &hash)
@@ -961,8 +954,8 @@ std::string get_nix_version_display_string()
if (!f)
return false;
std::ifstream::pos_type file_size = f.tellg();
SHA256_CTX ctx;
if (!SHA256_Init(&ctx))
std::unique_ptr<EVP_MD_CTX, decltype(&EVP_MD_CTX_free)> ctx(EVP_MD_CTX_new(), &EVP_MD_CTX_free);
if (!EVP_DigestInit_ex(ctx.get(), EVP_sha256(), nullptr))
return false;
size_t size_left = file_size;
f.seekg(0, std::ios::beg);
@@ -973,12 +966,12 @@ std::string get_nix_version_display_string()
f.read(buf, read_size);
if (!f || !f.good())
return false;
if (!SHA256_Update(&ctx, buf, read_size))
if (!EVP_DigestUpdate(ctx.get(), buf, read_size))
return false;
size_left -= read_size;
}
f.close();
if (!SHA256_Final((unsigned char*)hash.data, &ctx))
if (!EVP_DigestFinal_ex(ctx.get(), (unsigned char*)hash.data, nullptr))
return false;
return true;
}