Added cipher wrapper functions

diff --git a/src/include/gpxe/crypto.h b/src/include/gpxe/crypto.h
index 9023c35..1b543f0 100644 (file)
--- a/src/include/gpxe/crypto.h
+++ b/src/include/gpxe/crypto.h
@@ -8,6 +8,8 @@
  */
 
 #include <stdint.h>
+#include <stddef.h>
+#include <errno.h>
 
 /** A cryptographic algorithm */
 struct crypto_algorithm {
@@ -83,4 +85,28 @@ static inline void digest_final ( struct crypto_algorithm *crypto,
        crypto->final ( ctx, out );
 }
 
+static inline int cipher_encrypt ( struct crypto_algorithm *crypto,
+                                  void *ctx, const void *src, void *dst,
+                                  size_t len ) {
+       if ( ( len & ( crypto->blocksize - 1 ) ) ) {
+               return -EINVAL;
+       }
+       crypto->encode ( ctx, src, dst, len );
+       return 0;
+}
+
+static inline int cipher_decrypt ( struct crypto_algorithm *crypto,
+                                  void *ctx, const void *src, void *dst,
+                                  size_t len ) {
+       if ( ( len & ( crypto->blocksize - 1 ) ) ) {
+               return -EINVAL;
+       }
+       crypto->decode ( ctx, src, dst, len );
+       return 0;
+}
+
+static inline int is_stream_cipher ( struct crypto_algorithm *crypto ) {
+       return ( crypto->blocksize == 1 );
+}
+
 #endif /* _GPXE_CRYPTO_H */