7 files changed, 141 insertions, 8 deletions
diff --git a/sys/include/dev/random/chacha20.h b/sys/include/dev/random/chacha20.h
new file mode 100644
index 0000000..d35702a
--- /dev/null
+++ b/sys/include/dev/random/chacha20.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdint.h>
+#include <stddef.h>
+#include <string.h>
+
+#define ROTL(a,b) (((a) << (b)) | ((a) >> (32 - (b))))
+
+#define QR(a,b,c,d) \
+    a += b; d ^= a; d = ROTL(d, 16); \
+    c += d; b ^= c; b = ROTL(b, 12); \
+    a += b; d ^= a; d = ROTL(d, 8);  \
+    c += d; b ^= c; b = ROTL(b, 7);
+
+void chacha20_init(uint32_t state[16], const uint8_t key[32],
+    const uint8_t nonce[12], uint32_t counter);
+
+void chacha20_block(uint32_t state[16], uint8_t out[64]);
+void chacha20_encrypt(uint32_t state[16], uint8_t *in, uint8_t *out, size_t len);
+
diff --git a/sys/include/dev/random/entropy.h b/sys/include/dev/random/entropy.h
new file mode 100644
index 0000000..34d86df
--- /dev/null
+++ b/sys/include/dev/random/entropy.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdint.h>
+
+#define ENTROPY_POOL_SIZE 32
+
+struct entropy_pool {
+    uint8_t pool[ENTROPY_POOL_SIZE];
+    uint32_t entropy_bits;
+};
+
+void mix_entropy(struct entropy_pool *ep, const uint8_t *input,
+    size_t input_len, uint32_t input_entropy_bits);
diff --git a/sys/include/dev/random/siphash.h b/sys/include/dev/random/siphash.h
new file mode 100644
index 0000000..ecabb4a
--- /dev/null
+++ b/sys/include/dev/random/siphash.h
@@ -0,0 +1,34 @@
+/* <MIT License>
+ Copyright (c) 2013  Marek Majkowski <marek@popcount.org>
+
+ Permission is hereby granted, free of charge, to any person obtaining a copy
+ of this software and associated documentation files (the "Software"), to deal
+ in the Software without restriction, including without limitation the rights
+ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ copies of the Software, and to permit persons to whom the Software is
+ furnished to do so, subject to the following conditions:
+
+ The above copyright notice and this permission notice shall be included in
+ all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ THE SOFTWARE.
+ </MIT License>
+
+ Original location:
+    https://github.com/majek/csiphash/
+
+ Solution inspired by code from:
+    Samuel Neves (supercop/crypto_auth/siphash24/little)
+    djb (supercop/crypto_auth/siphash24/little2)
+    Jean-Philippe Aumasson (https://131002.net/siphash/siphash24.c)
+*/
+
+#include <stdint.h>
+
+uint64_t siphash24(const void *src, unsigned long src_sz, const char k[16]);
diff --git a/sys/include/sys/limits.h b/sys/include/sys/limits.h
index f56958e..5b97b68 100644
--- a/sys/include/sys/limits.h
+++ b/sys/include/sys/limits.h
@@ -31,6 +31,7 @@
 #define _SYS_LIMITS_H_
 
 #define PATH_MAX 1024
+#define NAME_MAX 256
 #define SSIZE_MAX 32767
 #define ARG_MAX 4096
 #define CHAR_BIT 8
diff --git a/sys/include/sys/syscall.h b/sys/include/sys/syscall.h
index 05288f4..51c2579 100644
--- a/sys/include/sys/syscall.h
+++ b/sys/include/sys/syscall.h
@@ -57,6 +57,7 @@
 #define SYS_getpid  16
 #define SYS_getppid 17
 #define SYS_setuid  18
+#define SYS_getuid  19
 
 #if defined(_KERNEL)
 /* Syscall return value and arg type */
diff --git a/sys/include/sys/ucred.h b/sys/include/sys/ucred.h
index b44a7fe..f8cbbe0 100644
--- a/sys/include/sys/ucred.h
+++ b/sys/include/sys/ucred.h
@@ -48,8 +48,10 @@ struct ucred {
 };
 
 int setuid(uid_t new);
+uid_t getuid(void);
 
 #if defined(_KERNEL)
 scret_t sys_setuid(struct syscall_args *scargs);
+scret_t sys_getuid(struct syscall_args *scargs);
 #endif
 #endif  /* !_SYS_UCRED_H_ */
diff --git a/sys/include/sys/vnode.h b/sys/include/sys/vnode.h
index b135433..3402b02 100644
--- a/sys/include/sys/vnode.h
+++ b/sys/include/sys/vnode.h
@@ -92,6 +92,16 @@ struct vop_create_args {
     struct vnode **vpp;     /* Result vnode */
 };
 
+struct vop_getattr_args {
+    struct vnode *vp;       /* Target vnode */
+    struct vattr *res;      /* Result vattr */
+};
+
+struct vop_readdir_args {
+    struct vnode *vp;       /* Target vnode */
+    struct sio_txn *sio;    /* SIO data to read into */
+};
+
 /*
  * A field in this structure is unavailable
  * if it has a value of VNOVAL.
@@ -101,14 +111,10 @@ struct vattr {
     size_t size;
 };
 
-struct vop_getattr_args {
-    struct vnode *vp;
-    struct vattr *res;
-};
-
 struct vops {
     int(*lookup)(struct vop_lookup_args *args);
     int(*getattr)(struct vop_getattr_args *args);
+    int(*readdir)(struct vop_readdir_args *args);
     int(*read)(struct vnode *vp, struct sio_txn *sio);
     int(*write)(struct vnode *vp, struct sio_txn *sio);
     int(*reclaim)(struct vnode *vp);
@@ -117,19 +123,21 @@ struct vops {
 
 extern struct vnode *g_root_vnode;
 
+/* Vnode cache operations */
 int vfs_vcache_type(void);
 int vfs_vcache_migrate(int newtype);
-
 int vfs_vcache_enter(struct vnode *vp);
 struct vnode *vfs_recycle_vnode(void);
 
+/* Vnode operations */
 int vfs_alloc_vnode(struct vnode **res, int type);
 int vfs_release_vnode(struct vnode *vp);
 
-int vfs_vop_lookup(struct vnode *vp, struct vop_lookup_args *args);
+/* Vnode operation wrappers */
+int vfs_vop_lookup(struct vop_lookup_args *args);
+int vfs_vop_getattr(struct vop_getattr_args *args);
 int vfs_vop_read(struct vnode *vp, struct sio_txn *sio);
 int vfs_vop_write(struct vnode *vp, struct sio_txn *sio);
-int vfs_vop_getattr(struct vnode *vp, struct vop_getattr_args *args);
 
 #endif  /* _KERNEL */
 #endif  /* !_SYS_VNODE_H_ */