Move OPENSSL_strcasecmp() and related to o_str.c

Otherwise the implementation is unnecessarily duplicated in legacy.so.

Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/18282)

crypto/ctype.c

@@ -7,18 +7,11 @@
  * https://www.openssl.org/source/license.html
  */
 
-#include "internal/e_os.h"
 #include <string.h>
 #include <stdio.h>
 #include "crypto/ctype.h"
 #include <openssl/ebcdic.h>
-#include "internal/core.h"
+
-#ifndef OPENSSL_NO_LOCALE
-# include <locale.h>
-# ifdef OPENSSL_SYS_MACOSX
-#  include <xlocale.h>
-# endif
-#endif
 /*
  * Define the character classes for each character in the seven bit ASCII
  * character set.  This is independent of the host's character set, characters
@@ -285,60 +278,3 @@ int ossl_ascii_isdigit(const char inchar) {
         return 1;
     return 0;
 }
-
-#ifndef OPENSSL_NO_LOCALE
-# ifndef FIPS_MODULE
-static locale_t loc;
-
-
-void *ossl_c_locale() {
-    return (void *)loc;
-}
-
-int ossl_init_casecmp_int() {
-# ifdef OPENSSL_SYS_WINDOWS
-    loc = _create_locale(LC_COLLATE, "C");
-# else
-    loc = newlocale(LC_COLLATE_MASK, "C", (locale_t) 0);
-# endif
-    return (loc == (locale_t) 0) ? 0 : 1;
-}
-
-void ossl_deinit_casecmp() {
-    freelocale(loc);
-}
-# endif
-
-int OPENSSL_strcasecmp(const char *s1, const char *s2)
-{
-    return strcasecmp_l(s1, s2, (locale_t)ossl_c_locale());
-}
-
-int OPENSSL_strncasecmp(const char *s1, const char *s2, size_t n)
-{
-    return strncasecmp_l(s1, s2, n, (locale_t)ossl_c_locale());
-}
-#else
-# ifndef FIPS_MODULE
-void *ossl_c_locale() {
-    return NULL;
-}
-# endif
-
-int ossl_init_casecmp_int() {
-    return 1;
-}
-
-void ossl_deinit_casecmp() {
-}
-
-int OPENSSL_strcasecmp(const char *s1, const char *s2)
-{
-    return strcasecmp(s1, s2);
-}
-
-int OPENSSL_strncasecmp(const char *s1, const char *s2, size_t n)
-{
-    return strncasecmp(s1, s2, n);
-}
-#endif

crypto/o_str.c

@@ -8,9 +8,17 @@
  */
 
 #include "internal/e_os.h"
+#include <string.h>
 #include <limits.h>
+#ifndef OPENSSL_NO_LOCALE
+# include <locale.h>
+# ifdef OPENSSL_SYS_MACOSX
+#  include <xlocale.h>
+# endif
+#endif
 #include <openssl/crypto.h>
 #include "internal/cryptlib.h"
+#include "internal/core.h"
 
 #define DEFAULT_SEPARATOR ':'
 #define CH_ZERO '\0'
@@ -338,3 +346,60 @@ int openssl_strerror_r(int errnum, char *buf, size_t buflen)
     return 1;
 #endif
 }
+
+#ifndef OPENSSL_NO_LOCALE
+# ifndef FIPS_MODULE
+static locale_t loc;
+
+
+void *ossl_c_locale() {
+    return (void *)loc;
+}
+
+int ossl_init_casecmp_int() {
+# ifdef OPENSSL_SYS_WINDOWS
+    loc = _create_locale(LC_COLLATE, "C");
+# else
+    loc = newlocale(LC_COLLATE_MASK, "C", (locale_t) 0);
+# endif
+    return (loc == (locale_t) 0) ? 0 : 1;
+}
+
+void ossl_deinit_casecmp() {
+    freelocale(loc);
+}
+# endif
+
+int OPENSSL_strcasecmp(const char *s1, const char *s2)
+{
+    return strcasecmp_l(s1, s2, (locale_t)ossl_c_locale());
+}
+
+int OPENSSL_strncasecmp(const char *s1, const char *s2, size_t n)
+{
+    return strncasecmp_l(s1, s2, n, (locale_t)ossl_c_locale());
+}
+#else
+# ifndef FIPS_MODULE
+void *ossl_c_locale() {
+    return NULL;
+}
+# endif
+
+int ossl_init_casecmp_int() {
+    return 1;
+}
+
+void ossl_deinit_casecmp() {
+}
+
+int OPENSSL_strcasecmp(const char *s1, const char *s2)
+{
+    return strcasecmp(s1, s2);
+}
+
+int OPENSSL_strncasecmp(const char *s1, const char *s2, size_t n)
+{
+    return strncasecmp(s1, s2, n);
+}
+#endif

include/crypto/ctype.h

@@ -79,7 +79,4 @@ int ossl_ascii_isdigit(const char inchar);
 # define ossl_isxdigit(c)       (ossl_ctype_check((c), CTYPE_MASK_xdigit))
 # define ossl_isbase64(c)       (ossl_ctype_check((c), CTYPE_MASK_base64))
 # define ossl_isasn1print(c)    (ossl_ctype_check((c), CTYPE_MASK_asn1print))
-
-int ossl_init_casecmp_int(void);
-void ossl_deinit_casecmp(void);
 #endif

include/internal/cryptlib.h

@@ -157,5 +157,6 @@ char *ossl_ipaddr_to_asc(unsigned char *p, int len);
 char *ossl_buf2hexstr_sep(const unsigned char *buf, long buflen, char sep);
 unsigned char *ossl_hexstr2buf_sep(const char *str, long *buflen,
                                    const char sep);
-
+int ossl_init_casecmp_int(void);
+void ossl_deinit_casecmp(void);
 #endif