Genericize raw binary <-> printable hex converters.

diff --git a/src/keytrans/gnutls-helpers.c b/src/keytrans/gnutls-helpers.c
index 5b4c46af187a2c662fb8ea97f66a54355cd1a5c2..7c4348dc0e8dd58048094ea475dc90cc82867634 100644 (file)
--- a/src/keytrans/gnutls-helpers.c
+++ b/src/keytrans/gnutls-helpers.c
@@ -44,11 +44,11 @@ void init_keyid(gnutls_openpgp_keyid_t keyid) {
 void make_keyid_printable(printable_keyid out, gnutls_openpgp_keyid_t keyid)
 {
   assert(sizeof(out) >= 2*sizeof(keyid));
-  hex_print_data((char*)out, (const char*)keyid, sizeof(keyid));
+  hex_print_data((char*)out, (const unsigned char*)keyid, sizeof(keyid));
 }
 
 /* you must have twice as many bytes in the out buffer as in the in buffer */
-void hex_print_data(char* out, const char* in, size_t incount)
+void hex_print_data(char* out, const unsigned char* in, size_t incount)
 {
   static const char hex[16] = "0123456789ABCDEF";
   unsigned int inix = 0, outix = 0;
@@ -73,7 +73,6 @@ unsigned char hex2bin(unsigned char x) {
 
 void collapse_printable_keyid(gnutls_openpgp_keyid_t out, printable_keyid in) {
   unsigned int pkix = 0, outkix = 0;
-  
   while (pkix < sizeof(printable_keyid)) {
     unsigned hi = hex2bin(in[pkix]);
     unsigned lo = hex2bin(in[pkix + 1]);
@@ -92,6 +91,27 @@ void collapse_printable_keyid(gnutls_openpgp_keyid_t out, printable_keyid in) {
   }
 }
 
+unsigned int hexstring2bin(unsigned char* out, const char* in) {
+  unsigned int pkix = 0, outkix = 0;
+  int hi = 0; /* which nybble is it? */
+  
+  while (in[pkix]) {
+    unsigned char z = hex2bin(in[pkix]);
+    if (z != 0xff) {
+      if (!hi) {
+       if (out) out[outkix] = (z << 4);
+       hi = 1;
+      } else {
+       if (out) out[outkix] |= z;
+       hi = 0;
+       outkix++;
+      }
+      pkix++;
+    }      
+  }
+  return outkix*8 + (hi ? 4 : 0);
+}
+
 int convert_string_to_keyid(gnutls_openpgp_keyid_t out, const char* str) {
   printable_keyid p;
   int ret;

diff --git a/src/keytrans/gnutls-helpers.h b/src/keytrans/gnutls-helpers.h
index f196456c58cf58f3453975c56d5bba75d6216fe1..bf54af0f93ec1a3f75951a715d1c1874b3dfb5e2 100644 (file)
--- a/src/keytrans/gnutls-helpers.h
+++ b/src/keytrans/gnutls-helpers.h
@@ -49,7 +49,18 @@ int convert_string_to_keyid(gnutls_openpgp_keyid_t out, const char* str);
 int convert_string_to_printable_keyid(printable_keyid out, const char* str);
 
 /* you must have twice as many bytes in the out buffer as in the in buffer */
-void hex_print_data(char* out, const char* in, size_t incount);
+void hex_print_data(char* out, const unsigned char* in, size_t incount);
+
+/* expects a null-terminated string as in, containing an even number
+   of hexadecimal characters.
+
+   returns length in *bits* of raw data as output. 
+
+   the out buffer must be at least half as long as in to hold the
+   output.  if out is NULL, no output will be generated, but the
+   length will still be returned.
+*/
+unsigned int hexstring2bin(unsigned char* out, const char* in);
 
 /* functions to get data into datum objects: */