Use modern openssl hash methods

The old ones was marked as deprecated in openssl 3.0.0 but
the replaments have been in openssl since 1.1.0.

1 files changed, 14 insertions, 8 deletions

diff --git a/src/hash_method_openssl.cc b/src/hash_method_openssl.cc
index 08884cb..75f6b8a 100644
--- a/src/hash_method_openssl.cc
+++ b/src/hash_method_openssl.cc
@@ -2,29 +2,35 @@
 
 #include "hash_method.hh"
 
-#include <openssl/sha.h>
+#include <openssl/evp.h>
 
 namespace {
 
 class Sha256HashMethod : public HashMethod {
 public:
   Sha256HashMethod() {
-    SHA256_Init(&ctx_);
+    ctx_ = EVP_MD_CTX_new();
+    EVP_DigestInit_ex(ctx_, EVP_sha256(), nullptr);
+  }
+
+  ~Sha256HashMethod() override {
+    EVP_MD_CTX_free(ctx_);
   }
 
   void update(void const* data, size_t count) override {
-    SHA256_Update(&ctx_, data, count);
+    EVP_DigestUpdate(ctx_, data, count);
   }
 
   std::string finish() override {
-    uint8_t out[SHA256_DIGEST_LENGTH];
-    SHA256_Final(out, &ctx_);
-    SHA256_Init(&ctx_);
-    return to_string(out, sizeof(out));
+    uint8_t out[EVP_MAX_MD_SIZE];
+    unsigned int len;
+    EVP_DigestFinal_ex(ctx_, out, &len);
+    EVP_DigestInit_ex(ctx_, EVP_sha256(), nullptr);
+    return to_string(out, len);
   }
 
 private:
-  SHA256_CTX ctx_;
+  EVP_MD_CTX* ctx_;
 };
 
 }  // namespace