[CRYPTO] hmac: Add crypto template implementation

This patch rewrites HMAC as a crypto template.  This means that HMAC is no
longer a hard-coded part of the API.  It's now a template that generates
standard digest algorithms like any other.

The old HMAC is preserved until all current users are converted.

The same structure can be used by other MACs such as AES-XCBC-MAC.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/crypto/Kconfig b/crypto/Kconfig
index 69c5f992bcd4..f07d9237950f 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -34,6 +34,7 @@ config CRYPTO_MANAGER
 
 config CRYPTO_HMAC
         bool "HMAC support"
+        select CRYPTO_HASH
         help
           HMAC: Keyed-Hashing for Message Authentication (RFC2104).
           This is required for IPSec.