doc: use static key for custom hash example

Removes the non-portable arc4random(3) at least.
Still depends on the non-portable OpenBSD SHA-2 functions.

While there, fix CC-0 header to match reality.

diff --git a/doc/man/man3/crypto_sign_init_first_pass_custom_hash.3monocypher b/doc/man/man3/crypto_sign_init_first_pass_custom_hash.3monocypher
index 5ce6c252f4dbe2beb659367e5f29c361df70d4f3..e818303f22ca5d4e3314de9fcbc2c9296d1f705d 100644 (file)
--- a/doc/man/man3/crypto_sign_init_first_pass_custom_hash.3monocypher
+++ b/doc/man/man3/crypto_sign_init_first_pass_custom_hash.3monocypher
@@ -38,7 +38,7 @@
 .\"
 .\" ----------------------------------------------------------------------------
 .\"
-.\" Written in 2017-2019 by Fabio Scotoni
+.\" Written in 2019 by Fabio Scotoni
 .\"
 .\" To the extent possible under law, the author(s) have dedicated all copyright
 .\" and related neighboring rights to this software to the public domain
@@ -48,7 +48,7 @@
 .\" with this software.  If not, see
 .\" <https://creativecommons.org/publicdomain/zero/1.0/>
 .\"
-.Dd December 12, 2019
+.Dd December 28, 2019
 .Dt CRYPTO_SIGN_INIT_FIRST_PASS_CUSTOM_HASH 3MONOCYPHER
 .Os
 .Sh NAME
@@ -255,12 +255,11 @@ int
 main(void)
 {
     uint8_t theirs[64], mine[64];
-    uint8_t sk[32];
+    uint8_t sk[32] = {0x01, 0x02, 0x03, 0x04};
     const uint8_t msg[] = {
         0x00, 0x01, 0x02, 0x04
     };
 
-    arc4random_buf(sk, sizeof(sk));
     crypto_ed25519_sign(theirs, sk, NULL, msg, sizeof(msg));
 
     struct outer_ctx ctx;