From: Loup Vaillant <loup@loup-vaillant.fr>
Date: Sat, 28 Mar 2020 11:29:03 +0000 (+0100)
Subject: More accurate code examples for Blake2b MAC
X-Git-Url: https://git.codecow.com/?a=commitdiff_plain;h=a33e2c31bf5c0e2dabb6756885cb2c7fb0c3a6bf;p=Monocypher.git

More accurate code examples for Blake2b MAC
---

diff --git a/doc/man/man3/crypto_blake2b.3monocypher b/doc/man/man3/crypto_blake2b.3monocypher
index 78ae03c..5ff809f 100644
--- a/doc/man/man3/crypto_blake2b.3monocypher
+++ b/doc/man/man3/crypto_blake2b.3monocypher
@@ -232,11 +232,11 @@ crypto_blake2b(hash, message, 12);
 .Pp
 Computing a message authentication code all at once:
 .Bd -literal -offset indent
-uint8_t hash   [64]; /* Output hash  (between 1 and 64 bytes)  */
-uint8_t key    [32]; /* Key          (between 0 and 64 bytes)  */
+uint8_t hash   [16];
+uint8_t key    [32];
 uint8_t message[11] = "Lorem ipsu"; /* Message to authenticate */
 arc4random_buf(key, 32);
-crypto_blake2b_general(hash, 64, key, 32, message, 11);
+crypto_blake2b_general(hash, 16, key, 32, message, 11);
 /* Wipe secrets if they are no longer needed */
 crypto_wipe(message, 11);
 crypto_wipe(key, 32);
@@ -256,12 +256,12 @@ crypto_blake2b_final(&ctx, hash);
 .Pp
 Computing a message authentication code incrementally:
 .Bd -literal -offset indent
-uint8_t hash   [ 64]; /* Output hash  (between 1 and 64 bytes) */
-uint8_t key    [ 32]; /* Key          (between 0 and 64 bytes) */
+uint8_t hash   [ 16];
+uint8_t key    [ 32];
 uint8_t message[500] = {1}; /* Message to authenticate         */
 crypto_blake2b_ctx ctx;
 arc4random_buf(key, 32);
-crypto_blake2b_general_init(&ctx, 64, key, 32);
+crypto_blake2b_general_init(&ctx, 16, key, 32);
 /* Wipe the key */
 crypto_wipe(key, 32);
 for (size_t i = 0; i < 500; i += 100) {