test: udp-preload: Proof of concept wrapping

[secnet.git] / util.c

diff --git a/util.c b/util.c
index b04b3c6cf6f0a923bc32a830c9cbb8af354f32dc..4982c93c58e6ae84fa0d8edc1eefedd59156862a 100644 (file)
--- a/util.c
+++ b/util.c
@@ -93,19 +93,23 @@ void *safe_malloc_ary(size_t size, size_t count, const char *message) {
     return safe_realloc_ary(0,size,count,message);
 }
 
-/* Hex-encode a buffer, and return the hex in a freshly allocated string. */
-string_t hex_encode(const uint8_t *bin, int binsize)
+void hex_encode(const uint8_t *bin, int binsize, char *buff)
 {
-    char *buff;
     int i;
 
-    buff=safe_malloc(binsize*2 + 1,"hex_encode");
-
     for (i=0; i<binsize; i++) {
        buff[i*2]=hexdigits[(bin[i] & 0xf0) >> 4];
        buff[i*2+1]=hexdigits[(bin[i] & 0xf)];
     }
     buff[binsize*2]=0;
+}
+
+string_t hex_encode_alloc(const uint8_t *bin, int binsize)
+{
+    char *buff;
+
+    buff=safe_malloc(hex_encode_size(binsize),"hex_encode");
+    hex_encode(bin,binsize,buff);
     return buff;
 }
 
@@ -163,15 +167,13 @@ done:
     return ok;
 }
 
-/* Convert a buffer into its MP_INT representation */
 void read_mpbin(MP_INT *a, uint8_t *bin, int binsize)
 {
-    char *buff = hex_encode(bin, binsize);
+    char *buff = hex_encode_alloc(bin, binsize);
     mpz_set_str(a, buff, 16);
     free(buff);
 }
 
-/* Convert a MP_INT into a hex string */
 char *write_mpstring(MP_INT *a)
 {
     char *buff;
@@ -181,7 +183,6 @@ char *write_mpstring(MP_INT *a)
     return buff;
 }
 
-/* Convert a MP_INT into a buffer; return length; truncate if necessary */
 int32_t write_mpbin(MP_INT *a, uint8_t *buffer, int32_t buflen)
 {
     char *hb = write_mpstring(a);
@@ -350,8 +351,6 @@ void *buf_unprepend(struct buffer_if *buf, int32_t amount) {
     return p;
 }
 
-/* Append a two-byte length and the string to the buffer. Length is in
-   network byte order. */
 void buf_append_string(struct buffer_if *buf, cstring_t s)
 {
     size_t len;
@@ -485,6 +484,14 @@ int consttime_memeq(const void *s1in, const void *s2in, size_t n)
     return accumulator;
 }
 
+void hash_hash(const struct hash_if *hashi, const void *msg, int32_t len,
+              uint8_t *digest) {
+    uint8_t hst[hashi->slen];
+    hashi->init(hst);
+    hashi->update(hst,msg,len);
+    hashi->final(hst,digest);
+}
+
 void util_module(dict_t *dict)
 {
     add_closure(dict,"sysbuffer",buffer_apply);