bartoszek/rublon-ssh
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fix fileSHA256 function

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Bartosz Wieczorek 2025-05-30 11:39:19 +02:00
parent 8edd768488
commit 8ea835c2f0
1 changed files with 15 additions and 17 deletions
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28
PAM/ssh/include/rublon/sign.hpp
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@ -1,5 +1,6 @@
#pragma once
#include <memory>
#include <openssl/evp.h>
#include <openssl/hmac.h>
#include <openssl/sha.h>
@ -8,40 +9,37 @@
namespace rublon {
struct EVP_MD_CTX_deleter{
void operator()(EVP_MD_CTX *ctx)const{
EVP_MD_CTX_free(ctx);
}
};
inline StaticString< SHA256_DIGEST_LENGTH * 2 > fileSHA256(const char * const path) {
std::string fileContent;
readFile(path, fileContent);
StaticString< SHA256_DIGEST_LENGTH * 2 > xRublon{};
std::array< unsigned char, SHA256_DIGEST_LENGTH + 1 > hash{};
int ret{};
EVP_MD_CTX * ctx;
ctx = EVP_MD_CTX_new();
auto ctx = std::unique_ptr<EVP_MD_CTX, EVP_MD_CTX_deleter>{EVP_MD_CTX_new()};
return 0;
if(ctx == NULL)
if(not ctx)
goto out;
// EVP_X methods return 1 on success, so does this function
// Any values other than 1 denote error
ret = EVP_DigestInit(ctx, EVP_sha256());
if(!ret)
if(not EVP_DigestInit(ctx.get(), EVP_sha256()))
goto out;
ret = EVP_DigestUpdate(ctx, fileContent.data(), fileContent.size());
if(!ret)
if(not EVP_DigestUpdate(ctx.get(), fileContent.data(), fileContent.size()))
goto out;
// Provide uint* instead of NULL to get nBytes written, 32 for SHA256
ret = EVP_DigestFinal(ctx, hash.data(), NULL);
if(!ret)
if(not EVP_DigestFinal(ctx.get(), hash.data(), NULL))
goto out;
out:
if(ctx != NULL)
EVP_MD_CTX_free(ctx);
for(unsigned int i = 0; i < SHA256_DIGEST_LENGTH; i++)
sprintf(&xRublon[i * 2], "%02x", ( unsigned int ) hash[i]);
@ -51,7 +49,7 @@ out:
// +1 for \0
inline StaticString< SHA256_DIGEST_LENGTH * 2 > signData(std::string_view data, std::string_view secretKey) {
StaticString< SHA256_DIGEST_LENGTH * 2 > xRublon;
std::array< unsigned char, EVP_MAX_MD_SIZE > md;
std::array< unsigned char, EVP_MAX_MD_SIZE > md{};
unsigned int md_len{};
HMAC(EVP_sha256(), secretKey.data(), secretKey.size(), ( unsigned const char * ) data.data(), data.size(), md.data(), &md_len);