Use const for the cipher context

skeeto · Sep 23, 2017 · d703205 · d703205
1 parent bb9c730
commit d703205
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Showing 2 changed files with 5 additions and 5 deletions.
diff --git a/blowfish.c b/blowfish.c
@@ -270,7 +270,7 @@ static const uint32_t blowfish_s[] = {
 };
 
 static uint32_t
-blowfish_f(uint32_t s[4][256], uint32_t x)
+blowfish_f(const uint32_t s[4][256], uint32_t x)
 {
     /* big endian */
     uint32_t b = 0xff;
@@ -299,7 +299,7 @@ blowfish_write(uint8_t *p, uint32_t v)
 }
 
 void
-blowfish_encrypt(struct blowfish *ctx, uint32_t *bl, uint32_t *br)
+blowfish_encrypt(const struct blowfish *ctx, uint32_t *bl, uint32_t *br)
 {
     uint32_t xl = *bl;
     uint32_t xr = *br;
@@ -316,7 +316,7 @@ blowfish_encrypt(struct blowfish *ctx, uint32_t *bl, uint32_t *br)
 }
 
 void
-blowfish_decrypt(struct blowfish *ctx, uint32_t *bl, uint32_t *br)
+blowfish_decrypt(const struct blowfish *ctx, uint32_t *bl, uint32_t *br)
 {
     uint32_t xl = *bl;
     uint32_t xr = *br;

diff --git a/blowfish.h b/blowfish.h
@@ -28,11 +28,11 @@ void blowfish_init(struct blowfish *, const void *key, int len);
 
 /* Encrypt a pair of 32-bit integers using the given context.
  */
-void blowfish_encrypt(struct blowfish *, uint32_t *, uint32_t *);
+void blowfish_encrypt(const struct blowfish *, uint32_t *, uint32_t *);
 
 /* Decrypt a pair of 32-bit integers using the given context.
  */
-void blowfish_decrypt(struct blowfish *, uint32_t *, uint32_t *);
+void blowfish_decrypt(const struct blowfish *, uint32_t *, uint32_t *);
 
 /* Compute the bcrypt digest for a given password.
  *