From bb845ee044587a91589357a772a02cffb0ba4454 Mon Sep 17 00:00:00 2001
From: "Dr. Stephen Henson" <steve@openssl.org>
Date: Fri, 5 Mar 2010 13:28:21 +0000
Subject: [PATCH] Add -engine_impl option to dgst which will use an
 implementation of an algorithm from the supplied engine instead of just the
 default one.

---
 apps/dgst.c | 27 +++++++++++++++++++++------
 1 file changed, 21 insertions(+), 6 deletions(-)

diff --git a/apps/dgst.c b/apps/dgst.c
index 9bf38ce73b..191bc25ee8 100644
--- a/apps/dgst.c
+++ b/apps/dgst.c
@@ -103,7 +103,7 @@ int MAIN(int, char **);
 
 int MAIN(int argc, char **argv)
 	{
-	ENGINE *e = NULL;
+	ENGINE *e = NULL, *impl = NULL;
 	unsigned char *buf=NULL;
 	int i,err=1;
 	const EVP_MD *md=NULL,*m;
@@ -124,6 +124,7 @@ int MAIN(int argc, char **argv)
 	char *passargin = NULL, *passin = NULL;
 #ifndef OPENSSL_NO_ENGINE
 	char *engine=NULL;
+	int engine_impl = 0;
 #endif
 	char *hmac_key=NULL;
 	char *mac_name=NULL;
@@ -208,6 +209,8 @@ int MAIN(int argc, char **argv)
 			engine= *(++argv);
         		e = setup_engine(bio_err, engine, 0);
 			}
+		else if (strcmp(*argv,"-engine_impl") == 0)
+			engine_impl = 1;
 #endif
 		else if (strcmp(*argv,"-hex") == 0)
 			out_bin = 0;
@@ -286,6 +289,11 @@ int MAIN(int argc, char **argv)
 		goto end;
 		}
 
+#ifndef OPENSSL_NO_ENGINE
+	if (engine_impl)
+		impl = e;
+#endif
+
 	in=BIO_new(BIO_s_file());
 	bmd=BIO_new(BIO_f_md());
 	if (debug)
@@ -363,7 +371,7 @@ int MAIN(int argc, char **argv)
 		{
 		EVP_PKEY_CTX *mac_ctx = NULL;
 		int r = 0;
-		if (!init_gen_str(bio_err, &mac_ctx, mac_name,e, 0))
+		if (!init_gen_str(bio_err, &mac_ctx, mac_name, impl, 0))
 			goto mac_end;
 		if (macopts)
 			{
@@ -397,7 +405,7 @@ int MAIN(int argc, char **argv)
 
 	if (hmac_key)
 		{
-		sigkey = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, e,
+		sigkey = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, impl,
 					(unsigned char *)hmac_key, -1);
 		if (!sigkey)
 			goto end;
@@ -415,9 +423,9 @@ int MAIN(int argc, char **argv)
 			goto end;
 			}
 		if (do_verify)
-			r = EVP_DigestVerifyInit(mctx, &pctx, md, e, sigkey);
+			r = EVP_DigestVerifyInit(mctx, &pctx, md, impl, sigkey);
 		else
-			r = EVP_DigestSignInit(mctx, &pctx, md, e, sigkey);
+			r = EVP_DigestSignInit(mctx, &pctx, md, impl, sigkey);
 		if (!r)
 			{
 			BIO_printf(bio_err, "Error setting context\n");
@@ -444,9 +452,16 @@ int MAIN(int argc, char **argv)
 	/* we use md as a filter, reading from 'in' */
 	else
 		{
+		EVP_MD_CTX *mctx = NULL;
+		if (!BIO_get_md_ctx(bmd, &mctx))
+			{
+			BIO_printf(bio_err, "Error getting context\n");
+			ERR_print_errors(bio_err);
+			goto end;
+			}
 		if (md == NULL)
 			md = EVP_md5(); 
-		if (!BIO_set_md(bmd,md))
+		if (!EVP_DigestInit_ex(mctx, md, impl))
 			{
 			BIO_printf(bio_err, "Error setting digest %s\n", pname);
 			ERR_print_errors(bio_err);
-- 
2.25.1