diff --git a/gb.openssl/configure.ac b/gb.openssl/configure.ac
index 9c33915da..9f36f2871 100644
--- a/gb.openssl/configure.ac
+++ b/gb.openssl/configure.ac
@@ -9,7 +9,7 @@ AC_PROG_LIBTOOL
 
 GB_COMPONENT_PKG_CONFIG(
   openssl, OPENSSL, gb.openssl, [src],
-  libcrypto)
+  'openssl >= 1.0.0' libcrypto)
 
 AC_OUTPUT(Makefile src/Makefile)
 GB_PRINT_MESSAGES
diff --git a/gb.openssl/src/c_digest.c b/gb.openssl/src/c_digest.c
index 0994decd0..725543933 100644
--- a/gb.openssl/src/c_digest.c
+++ b/gb.openssl/src/c_digest.c
@@ -139,55 +139,6 @@ GB_DESC CDigest[] = {
  * the behaviour described in their manpage.
  */
 #if OPENSSL_VERSION_NUMBER < 0x10100000L
-/*
- * Special treatment for OpenSSL 0.9.8*. The version hex below is 0.9.8zh.
- * The *_new() and *_free() routines were called *_create() and *_destroy()
- * there.
- */
-#if OPENSSL_VERSION_NUMBER <= 0x0090821fL
-static 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
-	 && !M_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
-	  && !M_EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE)) {
-		OPENSSL_cleanse(ctx->md_data,ctx->digest->ctx_size);
-		OPENSSL_free(ctx->md_data);
-	}
-#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. */
-		do_engine_finish(ctx->engine);
-#endif
-	memset(ctx,'\0',sizeof *ctx);
-	return 1;
-}
-
-static void EVP_MD_CTX_init(EVP_MD_CTX *ctx)
-{
-	memset(ctx, '\0', sizeof *ctx);
-}
-
-static EVP_MD_CTX *EVP_MD_CTX_new(void)
-{
-	EVP_MD_CTX *ctx = OPENSSL_malloc(sizeof *ctx);
-
-	if (ctx)
-		EVP_MD_CTX_init(ctx);
-	return ctx;
-}
-
-static void EVP_MD_CTX_free(EVP_MD_CTX *ctx)
-{
-	EVP_MD_CTX_cleanup(ctx);
-	OPENSSL_free(ctx);
-}
-#else /* Anything recent */
 static void OPENSSL_clear_free(void *str, size_t num)
 {
 	OPENSSL_cleanse(str, num);
@@ -240,7 +191,6 @@ static void EVP_MD_CTX_free(EVP_MD_CTX *ctx)
     OPENSSL_free(ctx);
 }
 #endif
-#endif
 
 /**G
  * Hash the given string using this digest algorithm.