"buffer" and "buffer size" are way too generic to be useful

demos/auth.c

@@ -20,7 +20,7 @@ auth(void)
 {
     unsigned char k[crypto_auth_KEYBYTES]; /* key */
     unsigned char a[crypto_auth_BYTES];    /* authentication token */
-    unsigned char m[BUFFER_SIZE];          /* message */
+    unsigned char m[MAX_INPUT_SIZE];       /* message */
     size_t mlen;                           /* message length */
     int r;
 

demos/box.c

@@ -30,10 +30,10 @@ box(void)
     unsigned char alice_pk[crypto_box_PUBLICKEYBYTES]; /* Alice public */
     unsigned char alice_sk[crypto_box_SECRETKEYBYTES]; /* Alice secret */
 
-    unsigned char n[crypto_box_NONCEBYTES];             /* message nonce */
-    unsigned char m[BUFFER_SIZE];                       /* plaintext */
-    unsigned char c[BUFFER_SIZE + crypto_box_MACBYTES]; /* ciphertext */
-    size_t mlen;                                        /* length */
+    unsigned char n[crypto_box_NONCEBYTES];                /* message nonce */
+    unsigned char m[MAX_INPUT_SIZE];                       /* plaintext */
+    unsigned char c[MAX_INPUT_SIZE + crypto_box_MACBYTES]; /* ciphertext */
+    size_t mlen;                                           /* length */
     int r;
 
     puts("Example: crypto_box_easy\n");

demos/demo_utils.c

@@ -15,7 +15,7 @@
  * ================================================================== */
 
 /*
- * Print hex is a wrapper around sodium_bin2hex which allocates
+ * print_hex() is a wrapper around sodium_bin2hex() which allocates
  * temporary memory then immediately prints the result.
  */
 void
@@ -64,7 +64,7 @@ prompt_input(char *prompt, char *input, const size_t max_input_len)
 }
 
 /*
- * Print a message if the function was sucessful or failed.
+ * Display whether the function was sucessful or failed.
  */
 void
 print_verification(int r)

demos/demo_utils.h

@@ -6,7 +6,7 @@
 
 #include <stdlib.h>
 
-#define BUFFER_SIZE 128 /* size of all input buffers in the demo */
+#define MAX_INPUT_SIZE 128 /* size of all input buffers in the demo */
 
 void print_hex(const void *bin, const size_t bin_len);
 size_t prompt_input(char *prompt, char *input, const size_t max_input_len);

demos/generichash.c

@@ -23,7 +23,7 @@ generichash(void)
 {
     unsigned char k[crypto_generichash_KEYBYTES_MAX]; /* key */
     unsigned char h[crypto_generichash_BYTES_MIN];    /* hash output */
-    unsigned char m[BUFFER_SIZE];                     /* message */
+    unsigned char m[MAX_INPUT_SIZE];                  /* message */
     size_t mlen;                                      /* length */
 
     puts("Example: crypto_generichash\n");

demos/generichashstream.c

@@ -21,7 +21,7 @@ generichashstream(void)
     unsigned char k[crypto_generichash_KEYBYTES_MAX]; /* key */
     unsigned char h[crypto_generichash_BYTES_MIN];    /* hash output */
     crypto_generichash_state state;                   /* hash stream */
-    unsigned char m[BUFFER_SIZE];                     /* input buffer */
+    unsigned char m[MAX_INPUT_SIZE];                  /* input buffer */
     size_t mlen;                                      /* input length */
 
     puts("Example: crypto_generichashstream\n");

demos/hash.c

@@ -18,7 +18,7 @@ static void
 hash(void)
 {
     unsigned char h[crypto_hash_BYTES]; /* hash output */
-    unsigned char m[BUFFER_SIZE];       /* message */
+    unsigned char m[MAX_INPUT_SIZE];    /* message */
     size_t mlen;                        /* length */
 
     puts("Example: crypto_hash\n");

demos/onetimeauth.c

@@ -22,7 +22,7 @@ onetimeauth(void)
 {
     unsigned char k[crypto_onetimeauth_KEYBYTES]; /* key */
     unsigned char a[crypto_onetimeauth_BYTES];    /* authentication */
-    unsigned char m[BUFFER_SIZE];                 /* message */
+    unsigned char m[MAX_INPUT_SIZE];              /* message */
     size_t mlen;                                  /* message length */
     int r;
 

demos/shorthash.c

@@ -20,7 +20,7 @@ shorthash(void)
 {
     unsigned char k[crypto_shorthash_KEYBYTES]; /* key */
     unsigned char h[crypto_shorthash_BYTES];    /* hash output */
-    unsigned char m[BUFFER_SIZE];               /* message */
+    unsigned char m[MAX_INPUT_SIZE];            /* message */
     size_t mlen;                                /* length */
 
     puts("Example: crypto_shorthash\n");

demos/sign.c

@@ -22,12 +22,12 @@
 static int
 sign(void)
 {
-    unsigned char pk[crypto_sign_PUBLICKEYBYTES];      /* Bob public */
-    unsigned char sk[crypto_sign_SECRETKEYBYTES];      /* Bob secret */
-    unsigned char m[BUFFER_SIZE];                      /* message */
-    unsigned char sm[BUFFER_SIZE + crypto_sign_BYTES]; /* signed message */
-    unsigned long long int mlen;                       /* message length */
-    unsigned long long int smlen;                      /* signed length */
+    unsigned char pk[crypto_sign_PUBLICKEYBYTES];         /* Bob public */
+    unsigned char sk[crypto_sign_SECRETKEYBYTES];         /* Bob secret */
+    unsigned char m[MAX_INPUT_SIZE];                      /* message */
+    unsigned char sm[MAX_INPUT_SIZE + crypto_sign_BYTES]; /* signed message */
+    unsigned long long int mlen;                          /* message length */
+    unsigned long long int smlen;                         /* signed length */
     int r;
 
     puts("Example: crypto_sign\n");

demos/stream.c

@@ -25,8 +25,8 @@ stream(void)
 {
     unsigned char k[crypto_stream_KEYBYTES];   /* secret key */
     unsigned char n[crypto_stream_NONCEBYTES]; /* message nonce */
-    unsigned char m[BUFFER_SIZE];              /* plain-text */
-    unsigned char c[BUFFER_SIZE];              /* cipher-text */
+    unsigned char m[MAX_INPUT_SIZE];           /* plain-text */
+    unsigned char c[MAX_INPUT_SIZE];           /* cipher-text */
     size_t mlen;                               /* length */
     int r;