crypto: Don't compile SHA1 support when Websockets are disabled

SHA1 is not ideal, security wise. Let's make sure we don't even have it
compiled when nothing depends on it, e.g. Websockets.

Author: jadahl

src/common/crypto.h

@@ -11,7 +11,9 @@
 int hash_md5(void *out, const void *in, const size_t in_len);
 
 /* Generates an SHA1 hash of 'in' and writes it to 'out', which must be 20 bytes in size. */
+#ifdef LIBVNCSERVER_WITH_WEBSOCKETS
 int hash_sha1(void *out, const void *in, const size_t in_len);
+#endif
 
 /* Fill 'out' with 'len' random bytes. */
 void random_bytes(void *out, size_t len);

src/common/crypto_included.c

@@ -33,6 +33,7 @@ int hash_md5(void *out, const void *in, const size_t in_len)
     return 0;
 }
 
+#ifdef LIBVNCSERVER_WITH_WEBSOCKETS
 int hash_sha1(void *out, const void *in, const size_t in_len)
 {
     SHA1Context sha1;
@@ -45,6 +46,7 @@ int hash_sha1(void *out, const void *in, const size_t in_len)
 
     return 1;
 }
+#endif /* LIBVNCSERVER_WITH_WEBSOCKETS */
 
 void random_bytes(void *out, size_t len)
 {

src/common/crypto_libgcrypt.c

@@ -74,6 +74,7 @@ int hash_md5(void *out, const void *in, const size_t in_len)
     return result;
 }
 
+#ifdef LIBVNCSERVER_WITH_WEBSOCKETS
 int hash_sha1(void *out, const void *in, const size_t in_len)
 {
     int result = 0;
@@ -98,6 +99,7 @@ int hash_sha1(void *out, const void *in, const size_t in_len)
     gcry_md_close(sha1);
     return result;
 }
+#endif /* LIBVNCSERVER_WITH_WEBSOCKETS */
 
 void random_bytes(void *out, size_t len)
 {

src/common/crypto_openssl.c

@@ -52,6 +52,7 @@ int hash_md5(void *out, const void *in, const size_t in_len)
     return 1;
 }
 
+#ifdef LIBVNCSERVER_WITH_WEBSOCKETS
 int hash_sha1(void *out, const void *in, const size_t in_len)
 {
     SHA_CTX sha1;
@@ -63,6 +64,7 @@ int hash_sha1(void *out, const void *in, const size_t in_len)
 	return 0;
     return 1;
 }
+#endif /* LIBVNCSERVER_WITH_WEBSOCKETS */
 
 void random_bytes(void *out, size_t len)
 {