+
+/* Hexdump */
+
+void silc_hexdump(const unsigned char *data, SilcUInt32 data_len,
+ FILE *output)
+{
+ int i, k;
+ int off, pos, count;
+ int len = data_len;
+
+ k = 0;
+ pos = 0;
+ count = 16;
+ off = len % 16;
+ while (1) {
+ if (off) {
+ if ((len - pos) < 16 && (len - pos <= len - off))
+ count = off;
+ } else {
+ if (pos == len)
+ count = 0;
+ }
+ if (off == len)
+ count = len;
+
+ if (count)
+ fprintf(output, "%08X ", k++ * 16);
+
+ for (i = 0; i < count; i++) {
+ fprintf(output, "%02X ", data[pos + i]);
+
+ if ((i + 1) % 4 == 0)
+ fprintf(output, " ");
+ }
+
+ if (count && count < 16) {
+ int j;
+
+ for (j = 0; j < 16 - count; j++) {
+ fprintf(output, " ");
+
+ if ((j + count + 1) % 4 == 0)
+ fprintf(output, " ");
+ }
+ }
+
+ for (i = 0; i < count; i++) {
+ char ch;
+
+ if (data[pos] < 32 || data[pos] >= 127)
+ ch = '.';
+ else
+ ch = data[pos];
+
+ fprintf(output, "%c", ch);
+ pos++;
+ }
+
+ if (count)
+ fprintf(output, "\n");
+
+ if (count < 16)
+ break;
+ }
+}
+
+/* Convert hex string to data. Each hex number must have two characters. */
+
+SilcBool silc_hex2data(const char *hex, unsigned char *data,
+ SilcUInt32 data_size, SilcUInt32 *ret_data_len)
+{
+ char *cp = (char *)hex;
+ unsigned char l, h;
+ int i;
+
+ if (data_size < strlen(hex) / 2) {
+ silc_set_errno(SILC_ERR_OVERFLOW);
+ return FALSE;
+ }
+
+ for (i = 0; i < strlen(hex) / 2; i++) {
+ h = *cp++;
+ l = *cp++;
+
+ h -= h < 'A' ? '0' : 'A' - 10;
+ l -= l < 'A' ? '0' : 'A' - 10;
+
+ data[i] = (h << 4) | (l & 0xf);
+ }
+
+ if (ret_data_len)
+ *ret_data_len = i;
+
+ SILC_LOG_HEXDUMP(("len %d", i), data, i);
+
+ return TRUE;
+}
+
+/* Converts binary data to HEX string */
+
+SilcBool silc_data2hex(const unsigned char *data, SilcUInt32 data_len,
+ char *hex, SilcUInt32 hex_size)
+{
+ unsigned char l, h;
+ char *cp = hex;
+ int i;
+
+ if (hex_size - 1 < data_len * 2) {
+ silc_set_errno(SILC_ERR_OVERFLOW);
+ return FALSE;
+ }
+
+ memset(hex, 0, hex_size);
+
+ for (i = 0; i < data_len; i++) {
+ l = data[i];
+ h = l >> 4;
+ l &= 0xf;
+
+ *cp++ = h + (h > 9 ? 'A' - 10 : '0');
+ *cp++ = l + (l > 9 ? 'A' - 10 : '0');
+ }
+
+ SILC_LOG_DEBUG(("HEX string: '%s'", hex));
+
+ return TRUE;
+}