-void EVP_MD_CTX_destroy(EVP_MD_CTX *ctx)
-{
- if (ctx) {
- EVP_MD_CTX_cleanup(ctx);
- OPENSSL_free(ctx);
- }
-}
-
-/* This call frees resources associated with the context */
-int EVP_MD_CTX_cleanup(EVP_MD_CTX *ctx)
-{
- /*
- * Don't assume ctx->md_data was cleaned in EVP_Digest_Final, because
- * sometimes only copies of the context are ever finalised.
- */
- if (ctx->digest && ctx->digest->cleanup
- && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_CLEANED))
- ctx->digest->cleanup(ctx);
- if (ctx->digest && ctx->digest->ctx_size && ctx->md_data
- && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE)) {
- OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size);
- }
- EVP_PKEY_CTX_free(ctx->pctx);
-#ifndef OPENSSL_NO_ENGINE
- if (ctx->engine)
- /*
- * The EVP_MD we used belongs to an ENGINE, release the functional
- * reference we held for this reason.
- */
- ENGINE_finish(ctx->engine);
-#endif
- memset(ctx, 0, sizeof(*ctx));
-
- return 1;
-}
-