SCTP: Fix build issues with SCTP AUTH.

SCTP-AUTH requires selection of CRYPTO, HMAC and SHA1 since
SHA1 is a MUST requirement for AUTH.  We also support SHA256,
but that's optional, so fix the code to treat it as such.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>

1 files changed, 6 insertions, 3 deletions

diff --git a/include/net/sctp/constants.h b/include/net/sctp/constants.h
index f30b537d6952..05f22a6afbcd 100644
--- a/include/net/sctp/constants.h
+++ b/include/net/sctp/constants.h
@@ -441,11 +441,14 @@ enum {
         SCTP_AUTH_HMAC_ID_RESERVED_0,
         SCTP_AUTH_HMAC_ID_SHA1,
         SCTP_AUTH_HMAC_ID_RESERVED_2,
-        SCTP_AUTH_HMAC_ID_SHA256
+#if defined (CONFIG_CRYPTO_SHA256) || defined (CONFIG_CRYPTO_SHA256_MODULE)
+        SCTP_AUTH_HMAC_ID_SHA256,
+#endif
+        __SCTP_AUTH_HMAC_MAX
 };
 
-#define SCTP_AUTH_HMAC_ID_MAX   SCTP_AUTH_HMAC_ID_SHA256
-#define SCTP_AUTH_NUM_HMACS (SCTP_AUTH_HMAC_ID_SHA256 + 1)
+#define SCTP_AUTH_HMAC_ID_MAX   __SCTP_AUTH_HMAC_MAX - 1
+#define SCTP_AUTH_NUM_HMACS     __SCTP_AUTH_HMAC_MAX
 #define SCTP_SHA1_SIG_SIZE 20
 #define SCTP_SHA256_SIG_SIZE 32