diff --git a/lib/util/charset/charset.h b/lib/util/charset/charset.h
index 82396e14985..16bb9c62fbf 100644
--- a/lib/util/charset/charset.h
+++ b/lib/util/charset/charset.h
@@ -130,17 +130,29 @@ void string_replace_m(char *s, char oldc, char newc);
 bool strcsequal(const char *s1,const char *s2);
 bool strequal_m(const char *s1, const char *s2);
 int strncasecmp_m(const char *s1, const char *s2, size_t n);
+int strncasecmp_m_handle(struct smb_iconv_handle *iconv_handle,
+			 const char *s1, const char *s2, size_t n);
 bool next_token(const char **ptr,char *buff, const char *sep, size_t bufsize);
+int strcasecmp_m_handle(struct smb_iconv_handle *iconv_handle,
+			const char *s1, const char *s2);
 int strcasecmp_m(const char *s1, const char *s2);
 size_t count_chars_m(const char *s, char c);
 void strupper_m(char *s);
 void strlower_m(char *s);
 char *strupper_talloc(TALLOC_CTX *ctx, const char *src);
 char *talloc_strdup_upper(TALLOC_CTX *ctx, const char *src);
+char *strupper_talloc_n_handle(struct smb_iconv_handle *iconv_handle,
+				TALLOC_CTX *ctx, const char *src, size_t n);
 char *strupper_talloc_n(TALLOC_CTX *ctx, const char *src, size_t n);
+ char *strlower_talloc_handle(struct smb_iconv_handle *iconv_handle,
+			      TALLOC_CTX *ctx, const char *src);
 char *strlower_talloc(TALLOC_CTX *ctx, const char *src);
 bool strhasupper(const char *string);
+bool strhaslower_handle(struct smb_iconv_handle *ic,
+			const char *string);
 bool strhaslower(const char *string);
+bool strhasupper_handle(struct smb_iconv_handle *ic,
+			const char *string);
 char *strrchr_m(const char *s, char c);
 char *strchr_m(const char *s, char c);
 
diff --git a/lib/util/charset/tests/convert_string.c b/lib/util/charset/tests/convert_string.c
index 5c7bdcb1da5..a634e84e9cb 100644
--- a/lib/util/charset/tests/convert_string.c
+++ b/lib/util/charset/tests/convert_string.c
@@ -490,6 +490,166 @@ static bool test_plato_latin_cp850_utf8(struct torture_context *tctx)
 	return true;
 }
 
+static bool test_gd_case_utf8(struct torture_context *tctx)
+{
+	struct smb_iconv_handle *iconv_handle;
+	DATA_BLOB gd_utf8 = base64_decode_data_blob(gd_utf8_base64);
+	char *gd_lower, *gd_upper;
+	talloc_steal(tctx, gd_utf8.data);
+
+	iconv_handle = get_iconv_testing_handle(tctx, "ASCII", "UTF8", "UTF8");
+	torture_assert(tctx, iconv_handle, "getting utf8 iconv handle");
+
+	torture_assert(tctx,
+		       strhasupper_handle(iconv_handle, (const char *)gd_utf8.data),
+		       "GD's name has an upper case character");
+	torture_assert(tctx,
+		       strhaslower_handle(iconv_handle, (const char *)gd_utf8.data),
+		       "GD's name has an lower case character");
+	gd_lower = strlower_talloc_handle(iconv_handle, tctx, (const char *)gd_utf8.data);
+	torture_assert(tctx, gd_lower, "failed to convert GD's name into lower case");
+	gd_upper = strupper_talloc_n_handle(iconv_handle, tctx, (const char *)gd_utf8.data, gd_utf8.length);
+	torture_assert(tctx, gd_lower, "failed to convert GD's name into upper case");
+
+	torture_assert(tctx,
+		       strhasupper_handle(iconv_handle, gd_upper),
+		       "upper case name has an upper case character");
+	torture_assert(tctx,
+		       strhaslower_handle(iconv_handle, gd_lower),
+		       "lower case name has an lower case character");
+	torture_assert(tctx,
+		       strhasupper_handle(iconv_handle, gd_lower) == false,
+		       "lower case name has no upper case character");
+	torture_assert(tctx,
+		       strhaslower_handle(iconv_handle, gd_upper) == false,
+		       "upper case name has no lower case character");
+
+	torture_assert(tctx, strcasecmp_m_handle(iconv_handle, (const char *)gd_utf8.data,
+						 gd_upper) == 0,
+		       "case insensitive comparison orig/upper");
+	torture_assert(tctx, strcasecmp_m_handle(iconv_handle, (const char *)gd_utf8.data,
+						 gd_lower) == 0,
+		       "case insensitive comparison orig/lower");
+	torture_assert(tctx, strcasecmp_m_handle(iconv_handle, gd_upper,
+						 gd_lower) == 0,
+		       "case insensitive comparison upper/lower");
+
+	/* This string isn't different in length upper/lower */
+	torture_assert(tctx, strncasecmp_m_handle(iconv_handle, (const char *)gd_utf8.data,
+						  gd_upper, gd_utf8.length) == 0,
+		       "case insensitive comparison orig/upper");
+	torture_assert(tctx, strncasecmp_m_handle(iconv_handle, (const char *)gd_utf8.data,
+						 gd_lower, gd_utf8.length) == 0,
+		       "case insensitive comparison orig/lower");
+	torture_assert(tctx, strncasecmp_m_handle(iconv_handle, gd_upper,
+						 gd_lower, gd_utf8.length) == 0,
+		       "case insensitive comparison upper/lower");
+	return true;
+}
+
+static bool test_gd_case_cp850(struct torture_context *tctx)
+{
+	struct smb_iconv_handle *iconv_handle;
+	DATA_BLOB gd_cp850 = base64_decode_data_blob(gd_cp850_base64);
+	char *gd_lower, *gd_upper;
+	talloc_steal(tctx, gd_cp850.data);
+
+	iconv_handle = get_iconv_testing_handle(tctx, "ASCII", "CP850", "CP850");
+	torture_assert(tctx, iconv_handle, "getting cp850 iconv handle");
+
+	torture_assert(tctx,
+		       strhasupper_handle(iconv_handle, (const char *)gd_cp850.data),
+		       "GD's name has an upper case character");
+	torture_assert(tctx,
+		       strhaslower_handle(iconv_handle, (const char *)gd_cp850.data),
+		       "GD's name has an lower case character");
+	gd_lower = strlower_talloc_handle(iconv_handle, tctx, (const char *)gd_cp850.data);
+	torture_assert(tctx, gd_lower, "failed to convert GD's name into lower case");
+	gd_upper = strupper_talloc_n_handle(iconv_handle, tctx, (const char *)gd_cp850.data, gd_cp850.length);
+	torture_assert(tctx, gd_lower, "failed to convert GD's name into upper case");
+
+	torture_assert(tctx,
+		       strhasupper_handle(iconv_handle, gd_upper),
+		       "upper case name has an upper case character");
+	torture_assert(tctx,
+		       strhaslower_handle(iconv_handle, gd_lower),
+		       "lower case name has an lower case character");
+	torture_assert(tctx,
+		       strhasupper_handle(iconv_handle, gd_lower) == false,
+		       "lower case name has no upper case character");
+	torture_assert(tctx,
+		       strhaslower_handle(iconv_handle, gd_upper) == false,
+		       "upper case name has no lower case character");
+
+	torture_assert(tctx, strcasecmp_m_handle(iconv_handle, (const char *)gd_cp850.data,
+						 gd_upper) == 0,
+		       "case insensitive comparison orig/upper");
+	torture_assert(tctx, strcasecmp_m_handle(iconv_handle, (const char *)gd_cp850.data,
+						 gd_lower) == 0,
+		       "case insensitive comparison orig/lower");
+	torture_assert(tctx, strcasecmp_m_handle(iconv_handle, gd_upper,
+						 gd_lower) == 0,
+		       "case insensitive comparison upper/lower");
+
+	/* This string isn't different in length upper/lower */
+	torture_assert(tctx, strncasecmp_m_handle(iconv_handle, (const char *)gd_cp850.data,
+						 gd_upper, gd_cp850.length) == 0,
+		       "case insensitive comparison orig/upper");
+	torture_assert(tctx, strncasecmp_m_handle(iconv_handle, (const char *)gd_cp850.data,
+						 gd_lower, gd_cp850.length) == 0,
+		       "case insensitive comparison orig/lower");
+	torture_assert(tctx, strncasecmp_m_handle(iconv_handle, gd_upper,
+						 gd_lower, gd_cp850.length) == 0,
+		       "case insensitive comparison upper/lower");
+	return true;
+}
+
+static bool test_plato_case_utf8(struct torture_context *tctx)
+{
+	struct smb_iconv_handle *iconv_handle;
+	DATA_BLOB plato_utf8 = base64_decode_data_blob(plato_utf8_base64);
+	char *plato_lower, *plato_upper;
+	talloc_steal(tctx, plato_utf8.data);
+
+	iconv_handle = get_iconv_testing_handle(tctx, "ASCII", "UTF8", "UTF8");
+	torture_assert(tctx, iconv_handle, "getting utf8 iconv handle");
+
+	torture_assert(tctx,
+		       strhasupper_handle(iconv_handle, (const char *)plato_utf8.data),
+		       "PLATO's apology has an upper case character");
+	torture_assert(tctx,
+		       strhaslower_handle(iconv_handle, (const char *)plato_utf8.data),
+		       "PLATO's apology has an lower case character");
+	plato_lower = strlower_talloc_handle(iconv_handle, tctx, (const char *)plato_utf8.data);
+	torture_assert(tctx, plato_lower, "failed to convert PLATO's apology into lower case");
+	plato_upper = strupper_talloc_n_handle(iconv_handle, tctx, (const char *)plato_utf8.data, plato_utf8.length);
+	torture_assert(tctx, plato_lower, "failed to convert PLATO's apology into upper case");
+
+	torture_assert(tctx,
+		       strhasupper_handle(iconv_handle, plato_upper),
+		       "upper case string has an upper case character");
+	torture_assert(tctx,
+		       strhaslower_handle(iconv_handle, plato_lower),
+		       "lower case string has an lower case character");
+	torture_assert(tctx,
+		       strhasupper_handle(iconv_handle, plato_lower) == false,
+		       "lower case string has no upper case character");
+	torture_assert(tctx,
+		       strhaslower_handle(iconv_handle, plato_upper) == false,
+		       "upper case string has no lower case character");
+
+	torture_assert(tctx, strcasecmp_m_handle(iconv_handle, (const char *)plato_utf8.data,
+						 plato_upper) == 0,
+		       "case insensitive comparison orig/upper");
+	torture_assert(tctx, strcasecmp_m_handle(iconv_handle, (const char *)plato_utf8.data,
+						 plato_lower) == 0,
+		       "case insensitive comparison orig/lower");
+	torture_assert(tctx, strcasecmp_m_handle(iconv_handle, plato_upper,
+						 plato_lower) == 0,
+		       "case insensitive comparison upper/lower");
+	return true;
+}
+
 struct torture_suite *torture_local_convert_string(TALLOC_CTX *mem_ctx)
 {
 	struct torture_suite *suite = torture_suite_create(mem_ctx, "convert_string_talloc");
@@ -501,3 +661,13 @@ struct torture_suite *torture_local_convert_string(TALLOC_CTX *mem_ctx)
 	torture_suite_add_simple_test(suite, "plato_ascii_cp850_utf8", test_plato_latin_cp850_utf8);
 	return suite;
 }
+
+struct torture_suite *torture_local_string_case(TALLOC_CTX *mem_ctx)
+{
+	struct torture_suite *suite = torture_suite_create(mem_ctx, "string_case");
+
+	torture_suite_add_simple_test(suite, "gd_case_utf8", test_gd_case_utf8);
+	torture_suite_add_simple_test(suite, "gd_case_cp850", test_gd_case_cp850);
+	torture_suite_add_simple_test(suite, "plato_case_utf8", test_plato_case_utf8);
+	return suite;
+}
diff --git a/lib/util/charset/util_str.c b/lib/util/charset/util_str.c
index f36c91eef35..e8f0b788b1c 100644
--- a/lib/util/charset/util_str.c
+++ b/lib/util/charset/util_str.c
@@ -28,13 +28,13 @@
 #endif
 
 /**
- Case insensitive string compararison
+ Case insensitive string compararison, handle specified for testing
 **/
-_PUBLIC_ int strcasecmp_m(const char *s1, const char *s2)
+_PUBLIC_ int strcasecmp_m_handle(struct smb_iconv_handle *iconv_handle,
+				 const char *s1, const char *s2)
 {
 	codepoint_t c1=0, c2=0;
 	size_t size1, size2;
-	struct smb_iconv_handle *iconv_handle = get_iconv_handle();
 
 	/* handle null ptr comparisons to simplify the use in qsort */
 	if (s1 == s2) return 0;
@@ -67,13 +67,22 @@ _PUBLIC_ int strcasecmp_m(const char *s1, const char *s2)
 }
 
 /**
- Case insensitive string compararison, length limited
+ Case insensitive string compararison
 **/
-_PUBLIC_ int strncasecmp_m(const char *s1, const char *s2, size_t n)
+_PUBLIC_ int strcasecmp_m(const char *s1, const char *s2)
+{
+	struct smb_iconv_handle *iconv_handle = get_iconv_handle();
+	return strcasecmp_m_handle(iconv_handle, s1, s2);
+}
+
+/**
+ Case insensitive string compararison, length limited, handle specified for testing
+**/
+_PUBLIC_ int strncasecmp_m_handle(struct smb_iconv_handle *iconv_handle,
+				  const char *s1, const char *s2, size_t n)
 {
 	codepoint_t c1=0, c2=0;
 	size_t size1, size2;
-	struct smb_iconv_handle *iconv_handle = get_iconv_handle();
 
 	/* handle null ptr comparisons to simplify the use in qsort */
 	if (s1 == s2) return 0;
@@ -111,6 +120,15 @@ _PUBLIC_ int strncasecmp_m(const char *s1, const char *s2, size_t n)
 	return *s1 - *s2;
 }
 
+/**
+ Case insensitive string compararison, length limited
+**/
+_PUBLIC_ int strncasecmp_m(const char *s1, const char *s2, size_t n)
+{
+	struct smb_iconv_handle *iconv_handle = get_iconv_handle();
+	return strncasecmp_m_handle(iconv_handle, s1, s2, n);
+}
+
 /**
  * Compare 2 strings.
  *
@@ -399,9 +417,9 @@ _PUBLIC_ char *strrchr_m(const char *s, char c)
 /**
   return True if any (multi-byte) character is lower case
 */
-_PUBLIC_ bool strhaslower(const char *string)
+_PUBLIC_ bool strhaslower_handle(struct smb_iconv_handle *ic,
+				 const char *string)
 {
-	struct smb_iconv_handle *ic = get_iconv_handle();
 	while (*string) {
 		size_t c_size;
 		codepoint_t s;
@@ -420,12 +438,18 @@ _PUBLIC_ bool strhaslower(const char *string)
 	return false;
 }
 
+_PUBLIC_ bool strhaslower(const char *string)
+{
+	struct smb_iconv_handle *ic = get_iconv_handle();
+	return strhaslower_handle(ic, string);
+}
+
 /**
   return True if any (multi-byte) character is upper case
 */
-_PUBLIC_ bool strhasupper(const char *string)
+_PUBLIC_ bool strhasupper_handle(struct smb_iconv_handle *ic,
+				 const char *string)
 {
-	struct smb_iconv_handle *ic = get_iconv_handle();
 	while (*string) {
 		size_t c_size;
 		codepoint_t s;
@@ -444,3 +468,8 @@ _PUBLIC_ bool strhasupper(const char *string)
 	return false;
 }
 
+_PUBLIC_ bool strhasupper(const char *string)
+{
+	struct smb_iconv_handle *ic = get_iconv_handle();
+	return strhasupper_handle(ic, string);
+}
diff --git a/lib/util/charset/util_unistr.c b/lib/util/charset/util_unistr.c
index 284863a71c1..41549bff879 100644
--- a/lib/util/charset/util_unistr.c
+++ b/lib/util/charset/util_unistr.c
@@ -134,11 +134,11 @@ _PUBLIC_ char *alpha_strcpy(char *dest, const char *src, const char *other_safe_
 /**
  Convert a string to lower case, allocated with talloc
 **/
-_PUBLIC_ char *strlower_talloc(TALLOC_CTX *ctx, const char *src)
+_PUBLIC_ char *strlower_talloc_handle(struct smb_iconv_handle *iconv_handle,
+				      TALLOC_CTX *ctx, const char *src)
 {
 	size_t size=0;
 	char *dest;
-	struct smb_iconv_handle *iconv_handle = get_iconv_handle();
 
 	if(src == NULL) {
 		return NULL;
@@ -176,15 +176,21 @@ _PUBLIC_ char *strlower_talloc(TALLOC_CTX *ctx, const char *src)
 	return dest;
 }
 
+_PUBLIC_ char *strlower_talloc(TALLOC_CTX *ctx, const char *src)
+{
+	struct smb_iconv_handle *iconv_handle = get_iconv_handle();
+	return strlower_talloc_handle(iconv_handle, ctx, src);
+}
+
 /**
  Convert a string to UPPER case, allocated with talloc
- source length limited to n bytes
+ source length limited to n bytes, iconv handle supplied
 **/
-_PUBLIC_ char *strupper_talloc_n(TALLOC_CTX *ctx, const char *src, size_t n)
+_PUBLIC_ char *strupper_talloc_n_handle(struct smb_iconv_handle *iconv_handle,
+					TALLOC_CTX *ctx, const char *src, size_t n)
 {
 	size_t size=0;
 	char *dest;
-	struct smb_iconv_handle *iconv_handle = get_iconv_handle();
 
 	if (!src) {
 		return NULL;
@@ -222,6 +228,15 @@ _PUBLIC_ char *strupper_talloc_n(TALLOC_CTX *ctx, const char *src, size_t n)
 	return dest;
 }
 
+/**
+ Convert a string to UPPER case, allocated with talloc
+ source length limited to n bytes
+**/
+_PUBLIC_ char *strupper_talloc_n(TALLOC_CTX *ctx, const char *src, size_t n)
+{
+	struct smb_iconv_handle *iconv_handle = get_iconv_handle();
+	return strupper_talloc_n_handle(iconv_handle, ctx, src, n);
+}
 /**
  Convert a string to UPPER case, allocated with talloc
 **/
diff --git a/source4/torture/local/local.c b/source4/torture/local/local.c
index d542bfec59a..53fab6636c7 100644
--- a/source4/torture/local/local.c
+++ b/source4/torture/local/local.c
@@ -61,6 +61,7 @@
 	torture_local_loadparm,
 	torture_local_charset,
 	torture_local_convert_string,
+	torture_local_string_case,
 	torture_local_compression,
 	torture_local_event, 
 	torture_local_torture,