Move RC4 into crypto.h as a replaceable crypto function

[libeap.git] / src / crypto / rc4.c

diff --git a/src/crypto/rc4.c b/src/crypto/rc4.c
index 70c790e..5ab1be1 100644 (file)
--- a/src/crypto/rc4.c
+++ b/src/crypto/rc4.c
@@ -15,24 +15,12 @@
 #include "includes.h"
 
 #include "common.h"
-#include "rc4.h"
+#include "crypto.h"
 
 #define S_SWAP(a,b) do { u8 t = S[a]; S[a] = S[b]; S[b] = t; } while(0)
 
-/**
- * rc4 - XOR RC4 stream to given data with skip-stream-start
- * @key: RC4 key
- * @keylen: RC4 key length
- * @skip: number of bytes to skip from the beginning of the RC4 stream
- * @data: data to be XOR'ed with RC4 stream
- * @data_len: buf length
- *
- * Generate RC4 pseudo random stream for the given key, skip beginning of the
- * stream, and XOR the end result with the data buffer to perform RC4
- * encryption/decryption.
- */
-void rc4_skip(const u8 *key, size_t keylen, size_t skip,
-             u8 *data, size_t data_len)
+int rc4_skip(const u8 *key, size_t keylen, size_t skip,
+            u8 *data, size_t data_len)
 {
        u32 i, j, k;
        u8 S[256], *pos;
@@ -67,4 +55,6 @@ void rc4_skip(const u8 *key, size_t keylen, size_t skip,
                S_SWAP(i, j);
                *pos++ ^= S[(S[i] + S[j]) & 0xff];
        }
+
+       return 0;
 }