1 files changed, 25 insertions, 0 deletions
diff --git a/g10/misc.c b/g10/misc.c
index 5c3ef12de..2f8d28af7 100644
--- a/g10/misc.c
+++ b/g10/misc.c
@@ -550,3 +550,28 @@ pct_expando(const char *string,PKT_public_key *pk)
   m_free(ret);
   return NULL;
 }
+
+int
+hextobyte( const char *s )
+{
+    int c;
+
+    if( *s >= '0' && *s <= '9' )
+	c = 16 * (*s - '0');
+    else if( *s >= 'A' && *s <= 'F' )
+	c = 16 * (10 + *s - 'A');
+    else if( *s >= 'a' && *s <= 'f' )
+	c = 16 * (10 + *s - 'a');
+    else
+	return -1;
+    s++;
+    if( *s >= '0' && *s <= '9' )
+	c += *s - '0';
+    else if( *s >= 'A' && *s <= 'F' )
+	c += 10 + *s - 'A';
+    else if( *s >= 'a' && *s <= 'f' )
+	c += 10 + *s - 'a';
+    else
+	return -1;
+    return c;
+}