New functions to enumerate digests and ciphers.

CHANGES

@@ -4,6 +4,12 @@
 
  Changes between 0.9.8b and 0.9.9  [xx XXX xxxx]
 
+  *) New functions EVP_CIPHER_do_all(), EVP_CIPHER_do_all_sorted(),
+     EVP_MD_do_all() and EVP_MD_do_all_sorted() to enumerate internal
+     digest and cipher tables. New options added to openssl utility:
+     list-message-digest-algorithms and list-cipher-algorithms.
+     [Steve Henson]
+
   *) In addition to the numerical (unsigned long) thread ID, provide
      for a pointer (void *) thread ID.  This helps accomodate systems
      that do not provide an unsigned long thread ID.  OpenSSL assumes

apps/openssl.c

@@ -142,6 +142,8 @@ static int MS_CALLBACK cmp(const void *a_void,const void *b_void);
 static LHASH *prog_init(void );
 static int do_cmd(LHASH *prog,int argc,char *argv[]);
 static void list_pkey(BIO *out);
+static void list_cipher(BIO *out);
+static void list_md(BIO *out);
 char *default_config_file=NULL;
 
 /* Make sure there is only one when MONOLITH is defined */
@@ -367,9 +369,12 @@ end:
 
 #define LIST_STANDARD_COMMANDS "list-standard-commands"
 #define LIST_MESSAGE_DIGEST_COMMANDS "list-message-digest-commands"
+#define LIST_MESSAGE_DIGEST_ALGORITHMS "list-message-digest-algorithms"
 #define LIST_CIPHER_COMMANDS "list-cipher-commands"
+#define LIST_CIPHER_ALGORITHMS "list-cipher-algorithms"
 #define LIST_PUBLIC_KEY_ALGORITHMS "list-public-key-algorithms"
 
+
 static int do_cmd(LHASH *prog, int argc, char *argv[])
 	{
 	FUNCTION f,*fp;
@@ -411,7 +416,9 @@ static int do_cmd(LHASH *prog, int argc, char *argv[])
 		}
 	else if ((strcmp(argv[0],LIST_STANDARD_COMMANDS) == 0) ||
 		(strcmp(argv[0],LIST_MESSAGE_DIGEST_COMMANDS) == 0) ||
+		(strcmp(argv[0],LIST_MESSAGE_DIGEST_ALGORITHMS) == 0) ||
 		(strcmp(argv[0],LIST_CIPHER_COMMANDS) == 0) ||
+		(strcmp(argv[0],LIST_CIPHER_ALGORITHMS) == 0) ||
 		(strcmp(argv[0],LIST_PUBLIC_KEY_ALGORITHMS) == 0))
 		{
 		int list_type;
@@ -421,8 +428,12 @@ static int do_cmd(LHASH *prog, int argc, char *argv[])
 			list_type = FUNC_TYPE_GENERAL;
 		else if (strcmp(argv[0],LIST_MESSAGE_DIGEST_COMMANDS) == 0)
 			list_type = FUNC_TYPE_MD;
+		else if (strcmp(argv[0],LIST_MESSAGE_DIGEST_ALGORITHMS) == 0)
+			list_type = FUNC_TYPE_MD_ALG;
 		else if (strcmp(argv[0],LIST_PUBLIC_KEY_ALGORITHMS) == 0)
 			list_type = FUNC_TYPE_PKEY;
+		else if (strcmp(argv[0],LIST_CIPHER_ALGORITHMS) == 0)
+			list_type = FUNC_TYPE_CIPHER_ALG;
 		else /* strcmp(argv[0],LIST_CIPHER_COMMANDS) == 0 */
 			list_type = FUNC_TYPE_CIPHER;
 		bio_stdout = BIO_new_fp(stdout,BIO_NOCLOSE);
@@ -438,6 +449,10 @@ static int do_cmd(LHASH *prog, int argc, char *argv[])
 
 		if (list_type == FUNC_TYPE_PKEY)
 			list_pkey(bio_stdout);	
+		if (list_type == FUNC_TYPE_MD_ALG)
+			list_md(bio_stdout);	
+		if (list_type == FUNC_TYPE_CIPHER_ALG)
+			list_cipher(bio_stdout);	
 		else
 			{
 			for (fp=functions; fp->name != NULL; fp++)
@@ -540,6 +555,46 @@ static void list_pkey(BIO *out)
 		}
 	}
 
+static void list_cipher_fn(const EVP_CIPHER *c,
+			const char *from, const char *to, void *arg)
+	{
+	if (c)
+		BIO_printf(arg, "%s\n", EVP_CIPHER_name(c));
+	else
+		{
+		if (!from)
+			from = "<undefined>";
+		if (!to)
+			to = "<undefined>";
+		BIO_printf(arg, "%s => %s\n", from, to);
+		}
+	}
+
+static void list_cipher(BIO *out)
+	{
+	EVP_CIPHER_do_all_sorted(list_cipher_fn, out);
+	}
+
+static void list_md_fn(const EVP_MD *m,
+			const char *from, const char *to, void *arg)
+	{
+	if (m)
+		BIO_printf(arg, "%s\n", EVP_MD_name(m));
+	else
+		{
+		if (!from)
+			from = "<undefined>";
+		if (!to)
+			to = "<undefined>";
+		BIO_printf(arg, "%s => %s\n", from, to);
+		}
+	}
+
+static void list_md(BIO *out)
+	{
+	EVP_MD_do_all_sorted(list_md_fn, out);
+	}
+
 static LHASH *prog_init(void)
 	{
 	LHASH *ret;

apps/progs.h

@@ -50,6 +50,8 @@ extern int ts_main(int argc,char *argv[]);
 #define FUNC_TYPE_MD		2
 #define FUNC_TYPE_CIPHER	3
 #define FUNC_TYPE_PKEY		4
+#define FUNC_TYPE_MD_ALG	5
+#define FUNC_TYPE_CIPHER_ALG	6
 
 typedef struct {
 	int type;

apps/progs.pl

@@ -14,6 +14,8 @@ print <<'EOF';
 #define FUNC_TYPE_MD		2
 #define FUNC_TYPE_CIPHER	3
 #define FUNC_TYPE_PKEY		4
+#define FUNC_TYPE_MD_ALG	5
+#define FUNC_TYPE_CIPHER_ALG	6
 
 typedef struct {
 	int type;

crypto/evp/evp.h

@@ -782,6 +782,16 @@ const EVP_CIPHER *EVP_get_cipherbyname(const char *name);
 const EVP_MD *EVP_get_digestbyname(const char *name);
 void EVP_cleanup(void);
 
+void EVP_CIPHER_do_all(void (*fn)(const EVP_CIPHER *ciph,
+		const char *from, const char *to, void *x), void *arg);
+void EVP_CIPHER_do_all_sorted(void (*fn)(const EVP_CIPHER *ciph,
+		const char *from, const char *to, void *x), void *arg);
+
+void EVP_MD_do_all(void (*fn)(const EVP_MD *ciph,
+		const char *from, const char *to, void *x), void *arg);
+void EVP_MD_do_all_sorted(void (*fn)(const EVP_MD *ciph,
+		const char *from, const char *to, void *x), void *arg);
+
 int		EVP_PKEY_decrypt_old(unsigned char *dec_key,
 			const unsigned char *enc_key,int enc_key_len,
 			EVP_PKEY *private_key);

crypto/evp/names.c

@@ -76,6 +76,7 @@ int EVP_add_cipher(const EVP_CIPHER *c)
 	return(r);
 	}
 
+
 int EVP_add_digest(const EVP_MD *md)
 	{
 	int r;
@@ -132,3 +133,71 @@ void EVP_cleanup(void)
 		OBJ_cleanup();
 		}
 	}
+
+struct doall_cipher
+	{
+	void *arg;
+	void (*fn)(const EVP_CIPHER *ciph,
+			const char *from, const char *to, void *arg);
+	};
+
+static void do_all_cipher_fn(const OBJ_NAME *nm, void *arg)
+	{
+	struct doall_cipher *dc = 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);
+	}
+
+void EVP_CIPHER_do_all(void (*fn)(const EVP_CIPHER *ciph,
+		const char *from, const char *to, void *x), void *arg)
+	{
+	struct doall_cipher dc;
+	dc.fn = fn;
+	dc.arg = arg;
+	OBJ_NAME_do_all(OBJ_NAME_TYPE_CIPHER_METH, do_all_cipher_fn, &dc);
+	}
+
+void EVP_CIPHER_do_all_sorted(void (*fn)(const EVP_CIPHER *ciph,
+		const char *from, const char *to, void *x), void *arg)
+	{
+	struct doall_cipher dc;
+	dc.fn = fn;
+	dc.arg = arg;
+	OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH, do_all_cipher_fn,&dc);
+	}
+
+struct doall_md
+	{
+	void *arg;
+	void (*fn)(const EVP_MD *ciph,
+			const char *from, const char *to, void *arg);
+	};
+
+static void do_all_md_fn(const OBJ_NAME *nm, void *arg)
+	{
+	struct doall_md *dc = 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);
+	}
+
+void EVP_MD_do_all(void (*fn)(const EVP_MD *md,
+		const char *from, const char *to, void *x), void *arg)
+	{
+	struct doall_md dc;
+	dc.fn = fn;
+	dc.arg = arg;
+	OBJ_NAME_do_all(OBJ_NAME_TYPE_MD_METH, do_all_md_fn, &dc);
+	}
+
+void EVP_MD_do_all_sorted(void (*fn)(const EVP_MD *md,
+		const char *from, const char *to, void *x), void *arg)
+	{
+	struct doall_md dc;
+	dc.fn = fn;
+	dc.arg = arg;
+	OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_MD_METH, do_all_md_fn, &dc);
+	}

crypto/lhash/lhash.c

@@ -273,6 +273,9 @@ static void doall_util_fn(LHASH *lh, int use_arg, LHASH_DOALL_FN_TYPE func,
 	int i;
 	LHASH_NODE *a,*n;
 
+	if (lh == NULL)
+		return;
+
 	/* reverse the order so we search from 'top to bottom'
 	 * We were having memory leaks otherwise */
 	for (i=lh->num_nodes-1; i>=0; i--)