minisign seed

minisign.patch

diff --color --recursive --text --unified a/src/minisign.c b/src/minisign.c
--- a/src/minisign.c	2024-05-26 01:03:18.372022776 +0200
+++ b/src/minisign.c	2024-05-26 01:03:45.448649920 +0200
@@ -676,10 +676,14 @@
     PubkeyStruct *pubkey_struct = xsodium_malloc(sizeof(PubkeyStruct));
     FILE         *fp;
 
+    char *phrase = "test";
+    char *seed = xsodium_malloc(40);
+    crypto_generichash(seed, 40, phrase, strlen(phrase), NULL, 0);
+
     abort_on_existing_key_files(pk_file, sk_file, force);
     memset(seckey_struct, 0, sizeof(SeckeyStruct));
-    randombytes_buf(seckey_struct->keynum_sk.keynum, sizeof seckey_struct->keynum_sk.keynum);
-    crypto_sign_keypair(pubkey_struct->keynum_pk.pk, seckey_struct->keynum_sk.sk);
+    memcpy(seckey_struct->keynum_sk.keynum, seed + 32, 8);
+    crypto_sign_seed_keypair(pubkey_struct->keynum_pk.pk, seckey_struct->keynum_sk.sk, seed);
     memcpy(seckey_struct->sig_alg, SIGALG, sizeof seckey_struct->sig_alg);
     memcpy(seckey_struct->kdf_alg, unencrypted_key ? KDFNONE : KDFALG,
            sizeof seckey_struct->kdf_alg);