(cbc_encrypt, cbc_decrypt): Use a _const_ void *ctx argument.

Rev: src/nettle/cbc.c:1.9
Rev: src/nettle/cbc.h:1.6

cbc.c

@@ -37,9 +37,9 @@
 #include "nettle-internal.h"
 
 void
-cbc_encrypt(void *ctx, void (*f)(void *ctx,
-				 unsigned length, uint8_t *dst,
-				 const uint8_t *src),
+cbc_encrypt(const void *ctx, void (*f)(const void *ctx,
+				       unsigned length, uint8_t *dst,
+				       const uint8_t *src),
 	    unsigned block_size, uint8_t *iv,
 	    unsigned length, uint8_t *dst,
 	    const uint8_t *src)
@@ -56,9 +56,9 @@ cbc_encrypt(void *ctx, void (*f)(void *ctx,
 
 /* Reqires that dst != src */
 static void
-cbc_decrypt_internal(void *ctx, void (*f)(void *ctx,
-					  unsigned length, uint8_t *dst,
-					  const uint8_t *src),
+cbc_decrypt_internal(const void *ctx, void (*f)(const void *ctx,
+						unsigned length, uint8_t *dst,
+						const uint8_t *src),
 		     unsigned block_size, uint8_t *iv,
 		     unsigned length, uint8_t *dst,
 		     const uint8_t *src)
@@ -80,9 +80,9 @@ cbc_decrypt_internal(void *ctx, void (*f)(void *ctx,
 #define CBC_BUFFER_LIMIT 4096
 
 void
-cbc_decrypt(void *ctx, void (*f)(void *ctx,
-				 unsigned length, uint8_t *dst,
-				 const uint8_t *src),
+cbc_decrypt(const void *ctx, void (*f)(const void *ctx,
+				       unsigned length, uint8_t *dst,
+				       const uint8_t *src),
 	    unsigned block_size, uint8_t *iv,
 	    unsigned length, uint8_t *dst,
 	    const uint8_t *src)

cbc.h

@@ -35,17 +35,17 @@
 /* Uses a void * for cipher contexts. */
 
 void
-cbc_encrypt(void *ctx, void (*f)(void *ctx,
-				 unsigned length, uint8_t *dst,
-				 const uint8_t *src),
+cbc_encrypt(const void *ctx, void (*f)(const void *ctx,
+				       unsigned length, uint8_t *dst,
+				       const uint8_t *src),
 	    unsigned block_size, uint8_t *iv,
 	    unsigned length, uint8_t *dst,
 	    const uint8_t *src);
 
 void
-cbc_decrypt(void *ctx, void (*f)(void *ctx,
-				 unsigned length, uint8_t *dst,
-				 const uint8_t *src),
+cbc_decrypt(const void *ctx, void (*f)(const void *ctx,
+				       unsigned length, uint8_t *dst,
+				       const uint8_t *src),
 	    unsigned block_size, uint8_t *iv,
 	    unsigned length, uint8_t *dst,
 	    const uint8_t *src);