miniroon

commit 3b759a5229fcfaaf3732f296bdda279507ef1081
parent 20e3aaaf3c753fd20d6f9df92e950d3e0cb18f53
Author: Jan Pobrislo <ccx@te2000.cz>
Date:   Thu,  7 Nov 2024 18:25:01 +0000

miniroon: WIP environment handling

Diffstat:
M
src/miniroon.c
 | 
51
++++++++++++++++++++++++++++++++++++++++++++++++---

1 file changed, 48 insertions(+), 3 deletions(-)
diff --git a/src/miniroon.c b/src/miniroon.c
@@ -13,6 +13,8 @@
 #include <skalibs/uint64.h>
 #include <skalibs/blake2s.h>
 #include <skalibs/sha256.h>
+#include <skalibs/stralloc.h>
+#include <skalibs/env.h>
 
 #define USAGE "miniroon directory"
 #define PROG "miniroon"
@@ -46,20 +48,37 @@ typedef struct miniroon_header_s {
 
 } miniroon_header;
 
+typedef struct miniroon_env_entry_s {
+  const bytebuffer name;
+  const bytebuffer value;
+  enum miniroon_env_state {
+    ENV_NO_CHANGE = 0,
+    ENV_SET = 1,
+    ENV_REMOVE = 2
+  } state;
+} miniroon_env_entry;
+
+typedef struct miniroon_env_map_s {
+  miniroon_env_entry env[MAX_ENV_ALLOW];
+  size_t env_count;
+} miniroon_env_map;
+
 typedef struct miniroon_data_s {
   miniroon_header hdr;
-  bytebuffer env_allow[MAX_ENV_ALLOW];
   bytebuffer caveats[MAX_CAVEATS];
-  size_t env_count;
   size_t caveat_count;
 } miniroon_data;
 
 /* declarations */
 void dbg_print_bb(const bytebuffer bb);
 void dbg_print_bb1(const char *text, const bytebuffer bb);
+void miniroon_env_map_init(miniroon_env_map *emap);
+void miniroon_env_map_add(miniroon_env_map *emap, const bytebuffer name);
+int miniroon_env_map_find(miniroon_env_map *emap, const bytebuffer name);
 void miniroon_data_init(miniroon_data *data);
 void process_payload(const bytebuffer payload);
 void process_header(miniroon_header *header, const bytebuffer source);
+void validate_caveats(miniroon_data *data);
 void read_secret(const bytebuffer secret);  // TODO
 void hmac_b2s_256(const bytebuffer key, const bytebuffer msg, const bytebuffer output);
 void hmac_sha2_256(const bytebuffer key, const bytebuffer msg, const bytebuffer output);
@@ -144,6 +163,7 @@ bool netstring_chunk_next (netstring_chunk *c) {
 
 void miniroon_data_init(miniroon_data *data) {
   memset(data, 0, sizeof(miniroon_data));
+  // data->env_modif = STRALLOC_ZERO ;
 }
 
 void fd_block(int fd) {
@@ -247,7 +267,7 @@ void read_payload(const bytebuffer bb) {
 void read_secret(const bytebuffer secret){
   assert(secret.len == MINIROON_HMAC_SIZE);
   size_t bytes_read = 0;
-  int secret_fd = open("secret", O_RDONLY);
+  int secret_fd = openc_readb("secret");
   if (secret_fd < 0) {
     strerr_dief1sys(111, "open(secret)");
   }
@@ -270,6 +290,29 @@ void read_secret(const bytebuffer secret){
   }
 }
 
+void miniroon_env_map_init(miniroon_env_map *emap) {
+  memset(emap, 0, sizeof(miniroon_env_map));
+}
+void miniroon_env_map_add(miniroon_env_map *emap, const bytebuffer name);
+// TODO
+int miniroon_env_map_find(miniroon_env_map *emap, const bytebuffer name);
+// TODO
+
+void validate_caveats(miniroon_data *md) {
+  miniroon_env_map emap;
+  miniroon_env_map_init(&emap);
+  // stralloc env_modif;
+
+  int env_allow_fd = openc_readb("env.allow");
+  if (env_allow_fd < 0) {
+    strerr_dief1sys(111, "open(env.allow)");
+  }
+
+  if(close(env_allow_fd) != 0) {
+    strerr_dief1sys(111, "close(env_allow_fd)");
+  }
+}
+
 void process_payload(const bytebuffer payload) {
   miniroon_data md;
   miniroon_data_init(&md);
@@ -323,6 +366,8 @@ void process_payload(const bytebuffer payload) {
     strerr_dief1x(111, "Invalid miniroon signature");
   }
 
+  validate_caveats(&md);
+
   /* iff everything validated correctly */
   // TODO: pass unused argv from main() ?
   char cmd[] = "./run";