1 files changed, 83 insertions, 0 deletions
diff --git a/include/crypto/ctype.h b/include/crypto/ctype.h
new file mode 100644
index 00000000..a35c137e
--- /dev/null
+++ b/include/crypto/ctype.h
@@ -0,0 +1,83 @@
+/*
+ * Copyright 2017-2021 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+/*
+ * This version of ctype.h provides a standardised and platform
+ * independent implementation that supports seven bit ASCII characters.
+ * The specific intent is to not pass extended ASCII characters (> 127)
+ * even if the host operating system would.
+ *
+ * There is EBCDIC support included for machines which use this.  However,
+ * there are a number of concerns about how well EBCDIC is supported
+ * throughout the rest of the source code.  Refer to issue #4154 for
+ * details.
+ */
+#ifndef OSSL_CRYPTO_CTYPE_H
+# define OSSL_CRYPTO_CTYPE_H
+# pragma once
+
+# define CTYPE_MASK_lower       0x1
+# define CTYPE_MASK_upper       0x2
+# define CTYPE_MASK_digit       0x4
+# define CTYPE_MASK_space       0x8
+# define CTYPE_MASK_xdigit      0x10
+# define CTYPE_MASK_blank       0x20
+# define CTYPE_MASK_cntrl       0x40
+# define CTYPE_MASK_graph       0x80
+# define CTYPE_MASK_print       0x100
+# define CTYPE_MASK_punct       0x200
+# define CTYPE_MASK_base64      0x400
+# define CTYPE_MASK_asn1print   0x800
+
+# define CTYPE_MASK_alpha   (CTYPE_MASK_lower | CTYPE_MASK_upper)
+# define CTYPE_MASK_alnum   (CTYPE_MASK_alpha | CTYPE_MASK_digit)
+
+/*
+ * The ascii mask assumes that any other classification implies that
+ * the character is ASCII and that there are no ASCII characters
+ * that aren't in any of the classifications.
+ *
+ * This assumption holds at the moment, but it might not in the future.
+ */
+# define CTYPE_MASK_ascii   (~0)
+
+# ifdef CHARSET_EBCDIC
+int ossl_toascii(int c);
+int ossl_fromascii(int c);
+# else
+#  define ossl_toascii(c)       (c)
+#  define ossl_fromascii(c)     (c)
+# endif
+int ossl_ctype_check(int c, unsigned int mask);
+int ossl_tolower(int c);
+int ossl_toupper(int c);
+
+int ossl_ascii_isdigit(const char inchar);
+
+# define ossl_isalnum(c)        (ossl_ctype_check((c), CTYPE_MASK_alnum))
+# define ossl_isalpha(c)        (ossl_ctype_check((c), CTYPE_MASK_alpha))
+# ifdef CHARSET_EBCDIC
+# define ossl_isascii(c)        (ossl_ctype_check((c), CTYPE_MASK_ascii))
+# else
+# define ossl_isascii(c)        (((c) & ~127) == 0)
+# endif
+# define ossl_isblank(c)        (ossl_ctype_check((c), CTYPE_MASK_blank))
+# define ossl_iscntrl(c)        (ossl_ctype_check((c), CTYPE_MASK_cntrl))
+# define ossl_isdigit(c)        (ossl_ctype_check((c), CTYPE_MASK_digit))
+# define ossl_isgraph(c)        (ossl_ctype_check((c), CTYPE_MASK_graph))
+# define ossl_islower(c)        (ossl_ctype_check((c), CTYPE_MASK_lower))
+# define ossl_isprint(c)        (ossl_ctype_check((c), CTYPE_MASK_print))
+# define ossl_ispunct(c)        (ossl_ctype_check((c), CTYPE_MASK_punct))
+# define ossl_isspace(c)        (ossl_ctype_check((c), CTYPE_MASK_space))
+# define ossl_isupper(c)        (ossl_ctype_check((c), CTYPE_MASK_upper))
+# 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))
+
+#endif