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others/C++/text converter/src/SHA512Converter.cpp

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+#include "../include/SHA512Converter.hpp"
+#include <openssl/evp.h>
+#include <sstream>
+#include <iomanip>
+#include <stdexcept>
+
+std::string SHA512Converter::convert(const std::string& input) {
+    EVP_MD_CTX* mdctx = EVP_MD_CTX_new();
+    if (!mdctx) {
+        throw std::runtime_error("Failed to create EVP_MD_CTX");
+    }
+
+    const EVP_MD* md = EVP_sha512();
+    if (!md) {
+        EVP_MD_CTX_free(mdctx);
+        throw std::runtime_error("SHA512 not supported by this OpenSSL version");
+    }
+
+    unsigned char digest[EVP_MAX_MD_SIZE];
+    unsigned int digest_len;
+
+    if (EVP_DigestInit_ex(mdctx, md, nullptr) != 1) {
+        EVP_MD_CTX_free(mdctx);
+        throw std::runtime_error("Failed to initialize digest");
+    }
+
+    if (EVP_DigestUpdate(mdctx, input.c_str(), input.length()) != 1) {
+        EVP_MD_CTX_free(mdctx);
+        throw std::runtime_error("Failed to update digest");
+    }
+
+    if (EVP_DigestFinal_ex(mdctx, digest, &digest_len) != 1) {
+        EVP_MD_CTX_free(mdctx);
+        throw std::runtime_error("Failed to finalize digest");
+    }
+
+    EVP_MD_CTX_free(mdctx);
+
+    std::stringstream ss;
+    for(unsigned int i = 0; i < digest_len; i++) {
+        ss << std::hex << std::setw(2) << std::setfill('0') << (int)digest[i];
+    }
+
+    return ss.str();
+}