Print out registered digest names in dgst utility instead of hard

coding them. Modify EVP_MD_do_all() to include registered digest name.

This is a modified version of part of PR#1887.

CHANGES

@@ -4,6 +4,14 @@
 
  Changes between 0.9.8k and 1.0  [xx XXX xxxx]
 
+  *) Add "missing" function EVP_MD_flags() (without this the only way to
+     retrieve a digest flags is by accessing the structure directly. Update
+     EVP_MD_do_all*() and EVP_CIPHER_do_all*() to include the name a digest
+     or cipher is registered as in the "from" argument. Print out all
+     registered digests in the dgst usage message instead of manually 
+     attempting to work them out.
+     [Steve Henson]
+
   *) If no SSLv2 ciphers are used don't use an SSLv2 compatible client hello:
      this allows the use of compression and extensions. Change default cipher
      string to remove SSLv2 ciphersuites. This effectively avoids ancient SSLv2

apps/dgst.c

@@ -79,6 +79,26 @@ int do_fp(BIO *out, unsigned char *buf, BIO *bp, int sep, int binout,
 	  const char *sig_name, const char *md_name,
 	  const char *file,BIO *bmd);
 
+static void list_md_fn(const EVP_MD *m,
+			const char *from, const char *to, void *arg)
+	{
+	const char *mname;
+	/* Skip aliases */
+	if (!m)
+		return;
+	mname = OBJ_nid2ln(EVP_MD_type(m));
+	/* Skip shortnames */
+	if (strcmp(from, mname))
+		return;
+	/* Skip clones */
+	if (EVP_MD_flags(m) & EVP_MD_FLAG_PKEY_DIGEST)
+		return;
+	if (strchr(mname, ' '))
+		mname= EVP_MD_name(m);
+	BIO_printf(arg, "-%-14s to use the %s message digest algorithm\n",
+			mname, mname);
+	}
+
 int MAIN(int, char **);
 
 int MAIN(int argc, char **argv)
@@ -256,36 +276,7 @@ int MAIN(int argc, char **argv)
 		BIO_printf(bio_err,"-engine e       use engine e, possibly a hardware device.\n");
 #endif
 
-		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm (default)\n",
+		EVP_MD_do_all_sorted(list_md_fn, bio_err);
-			LN_md5,LN_md5);
-		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",
-			LN_md4,LN_md4);
-		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",
-			LN_md2,LN_md2);
-#ifndef OPENSSL_NO_SHA
-		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",
-			LN_sha1,LN_sha1);
-#ifndef OPENSSL_NO_SHA256
-		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",
-			LN_sha224,LN_sha224);
-		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",
-			LN_sha256,LN_sha256);
-#endif
-#ifndef OPENSSL_NO_SHA512
-		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",
-			LN_sha384,LN_sha384);
-		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",
-			LN_sha512,LN_sha512);
-#endif
-#endif
-		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",
-			LN_mdc2,LN_mdc2);
-		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",
-			LN_ripemd160,LN_ripemd160);
-#ifndef OPENSSL_NO_WHIRLPOOL
-		BIO_printf(bio_err,"-%-14s to use the %s message digest algorithm\n",
-			SN_whirlpool,SN_whirlpool);
-#endif
 		goto end;
 		}
 

crypto/evp/evp.h

@@ -421,6 +421,7 @@ int EVP_MD_type(const EVP_MD *md);
 int EVP_MD_pkey_type(const EVP_MD *md);	
 int EVP_MD_size(const EVP_MD *md);
 int EVP_MD_block_size(const EVP_MD *md);
+unsigned long EVP_MD_flags(const EVP_MD *md);
 
 const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx);
 #define EVP_MD_CTX_size(e)		EVP_MD_size(EVP_MD_CTX_md(e))

crypto/evp/evp_lib.c

@@ -263,6 +263,11 @@ int EVP_MD_size(const EVP_MD *md)
 	return md->md_size;
 	}
 
+unsigned long EVP_MD_flags(const EVP_MD *md)
+	{
+	return md->flags;
+	}
+
 const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
 	{
 	if (!ctx)

crypto/evp/names.c

@@ -145,7 +145,7 @@ static void do_all_cipher_fn(const OBJ_NAME *nm, void *arg)
 	if (nm->alias)
 		dc->fn(NULL, nm->name, nm->data, dc->arg);
 	else
-		dc->fn((const EVP_CIPHER *)nm->data, NULL, NULL, dc->arg);
+		dc->fn((const EVP_CIPHER *)nm->data, nm->name, NULL, dc->arg);
 	}
 
 void EVP_CIPHER_do_all(void (*fn)(const EVP_CIPHER *ciph,
@@ -179,7 +179,7 @@ static void do_all_md_fn(const OBJ_NAME *nm, void *arg)
 	if (nm->alias)
 		dc->fn(NULL, nm->name, nm->data, dc->arg);
 	else
-		dc->fn((const EVP_MD *)nm->data, NULL, NULL, dc->arg);
+		dc->fn((const EVP_MD *)nm->data, nm->name, NULL, dc->arg);
 	}
 
 void EVP_MD_do_all(void (*fn)(const EVP_MD *md,