Remove container->crypto dependency

Containers were using crypto_digest.h, just to see the value of
DIGEST_LEN.  Moved those constants into a new defs module.

src/include.am

@@ -5,6 +5,7 @@ include src/lib/ctime/include.am
 include src/lib/compress/include.am
 include src/lib/container/include.am
 include src/lib/crypt_ops/include.am
+include src/lib/defs/include.am
 include src/lib/include.libdonna.am
 include src/lib/malloc/include.am
 include src/lib/testsupport/include.am

src/lib/container/map.c

@@ -13,7 +13,7 @@
 
 #include "lib/container/map.h"
 #include "lib/ctime/di_ops.h"
-#include "lib/crypt_ops/crypto_digest.h"
+#include "lib/defs/digest_sizes.h"
 
 #include "common/util_bug.h"
 #include "common/util.h" // For strlower

src/lib/container/smartlist.c

@@ -15,7 +15,7 @@
 #include "lib/container/smartlist.h"
 #include "lib/err/torerr.h"
 #include "common/util.h" // For strstrip.
-#include "lib/crypt_ops/crypto_digest.h"
+#include "lib/defs/digest_sizes.h"
 #include "lib/ctime/di_ops.h"
 
 #include <stdlib.h>

src/lib/crypt_ops/.may_include

@@ -2,6 +2,7 @@ orconfig.h
 lib/cc/*.h
 lib/crypt_ops/*.h
 lib/ctime/*.h
+lib/defs/*.h
 lib/err/*.h
 lib/testsupport/testsupport.h
 

src/lib/crypt_ops/crypto_digest.c

@@ -580,4 +580,3 @@ crypto_xof_free_(crypto_xof_t *xof)
   memwipe(xof, 0, sizeof(crypto_xof_t));
   tor_free(xof);
 }
-

src/lib/crypt_ops/crypto_digest.h

@@ -17,14 +17,7 @@
 
 #include "lib/container/container.h"
 #include "lib/cc/torint.h"
-
-/** Length of the output of our message digest. */
-#define DIGEST_LEN 20
-/** Length of the output of our second (improved) message digests.  (For now
- * this is just sha256, but it could be any other 256-bit digest.) */
-#define DIGEST256_LEN 32
-/** Length of the output of our 64-bit optimized message digests (SHA512). */
-#define DIGEST512_LEN 64
+#include "lib/defs/digest_sizes.h"
 
 /** Length of a sha1 message digest when encoded in base32 with trailing =
  * signs removed. */
@@ -133,4 +126,3 @@ digest_algorithm_t crypto_digest_get_algorithm(crypto_digest_t *digest);
 #endif
 
 #endif /* !defined(TOR_CRYPTO_DIGEST_H) */
-

src/lib/defs/.may_include

+orconfig.h

src/lib/defs/digest_sizes.h

+/* Copyright (c) 2001, Matej Pfajfar.
+ * Copyright (c) 2001-2004, Roger Dingledine.
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2018, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+#ifndef TOR_DIGEST_SIZES_H
+#define TOR_DIGEST_SIZES_H
+
+/** Length of the output of our message digest. */
+#define DIGEST_LEN 20
+/** Length of the output of our second (improved) message digests.  (For now
+ * this is just sha256, but it could be any other 256-bit digest.) */
+#define DIGEST256_LEN 32
+/** Length of the output of our 64-bit optimized message digests (SHA512). */
+#define DIGEST512_LEN 64
+
+#endif

src/lib/defs/include.am

+
+noinst_HEADERS += \
+	digest_sizes.h