Provided by: libczmq-dev_4.1.0-2_amd64 bug

NAME

       zarmour - Class for armoured text encoding and decoding

SYNOPSIS

       //  This is a stable class, and may not change except for emergencies. It
       //  is provided in stable builds.
       #define ZARMOUR_MODE_BASE64_STD 0           // Standard base 64
       #define ZARMOUR_MODE_BASE64_URL 1           // URL and filename friendly base 64
       #define ZARMOUR_MODE_BASE32_STD 2           // Standard base 32
       #define ZARMOUR_MODE_BASE32_HEX 3           // Extended hex base 32
       #define ZARMOUR_MODE_BASE16 4               // Standard base 16
       #define ZARMOUR_MODE_Z85 5                  // Z85 from ZeroMQ RFC 32

       //  Create a new zarmour
       CZMQ_EXPORT zarmour_t *
           zarmour_new (void);

       //  Destroy the zarmour
       CZMQ_EXPORT void
           zarmour_destroy (zarmour_t **self_p);

       //  Encode a stream of bytes into an armoured string. Returns the armoured
       //  string, or NULL if there was insufficient memory available to allocate
       //  a new string.
       //  Caller owns return value and must destroy it when done.
       CZMQ_EXPORT char *
           zarmour_encode (zarmour_t *self, const byte *data, size_t size);

       //  Decode an armoured string into a chunk. The decoded output is
       //  null-terminated, so it may be treated as a string, if that's what
       //  it was prior to encoding.
       //  Caller owns return value and must destroy it when done.
       CZMQ_EXPORT zchunk_t *
           zarmour_decode (zarmour_t *self, const char *data);

       //  Get the mode property.
       CZMQ_EXPORT int
           zarmour_mode (zarmour_t *self);

       //  Get printable string for mode.
       CZMQ_EXPORT const char *
           zarmour_mode_str (zarmour_t *self);

       //  Set the mode property.
       CZMQ_EXPORT void
           zarmour_set_mode (zarmour_t *self, int mode);

       //  Return true if padding is turned on.
       CZMQ_EXPORT bool
           zarmour_pad (zarmour_t *self);

       //  Turn padding on or off. Default is on.
       CZMQ_EXPORT void
           zarmour_set_pad (zarmour_t *self, bool pad);

       //  Get the padding character.
       CZMQ_EXPORT char
           zarmour_pad_char (zarmour_t *self);

       //  Set the padding character.
       CZMQ_EXPORT void
           zarmour_set_pad_char (zarmour_t *self, char pad_char);

       //  Return if splitting output into lines is turned on. Default is off.
       CZMQ_EXPORT bool
           zarmour_line_breaks (zarmour_t *self);

       //  Turn splitting output into lines on or off.
       CZMQ_EXPORT void
           zarmour_set_line_breaks (zarmour_t *self, bool line_breaks);

       //  Get the line length used for splitting lines.
       CZMQ_EXPORT size_t
           zarmour_line_length (zarmour_t *self);

       //  Set the line length used for splitting lines.
       CZMQ_EXPORT void
           zarmour_set_line_length (zarmour_t *self, size_t line_length);

       //  Print properties of object
       CZMQ_EXPORT void
           zarmour_print (zarmour_t *self);

       //  Self test of this class.
       CZMQ_EXPORT void
           zarmour_test (bool verbose);

       Please add '@interface' section in './../src/zarmour.c'.

DESCRIPTION

       zarmour - armoured text encoding and decoding

       The zarmour class implements encoding and decoding of armoured text data. The following
       codecs are implemented: * RFC 4648 (http://www.ietf.org/rfc/rfc4648.txt) - base64 -
       base64url - base32 - base32hex - base16 * Z85 (http://rfc.zeromq.org/spec:32) All RFC4648
       base64 and base32 variants support padding the output. The pad character is configurable.
       Default is padding on, with character =. Additionally, in some cases (e.g. MIME),
       splitting the output into lines of a specific length is required. This feature is also
       supported, though turned off by default. The z85 mode does neither padding nor line
       breaks; it is merely a wrapping of the corresponding libzmq methods. Encoding will assert
       if input length is not divisible by 4 and decoding will assert if input length is not
       divisible by 5.

EXAMPLE

       From zarmour_test method.

           zarmour_t *self = zarmour_new ();
           assert (self);

           int mode = zarmour_mode (self);
           assert (mode == ZARMOUR_MODE_BASE64_STD);

           zarmour_set_mode (self, ZARMOUR_MODE_BASE64_URL);
           mode = zarmour_mode (self);
           assert (mode == ZARMOUR_MODE_BASE64_URL);

           assert (zarmour_pad (self));
           zarmour_set_pad (self, false);
           assert (!zarmour_pad (self));

           assert (zarmour_pad_char (self) == '=');
           zarmour_set_pad_char (self, '!');
           assert (zarmour_pad_char (self) == '!');
           zarmour_set_pad_char (self, '=');
           assert (zarmour_pad_char (self) == '=');

           assert (!zarmour_line_breaks (self));
           zarmour_set_line_breaks (self, true);
           assert (zarmour_line_breaks (self));

           assert (zarmour_line_length (self) == 72);
           zarmour_set_line_length (self, 64);
           assert (zarmour_line_length (self) == 64);

           //  Test against test vectors from RFC4648.
           zarmour_set_mode (self, ZARMOUR_MODE_BASE64_STD);
           if (verbose)
               zarmour_print (self);

           s_armour_test (self, "", "", verbose);
           s_armour_test (self, "f", "Zg", verbose);
           s_armour_test (self, "fo", "Zm8", verbose);
           s_armour_test (self, "foo", "Zm9v", verbose);
           s_armour_test (self, "foob", "Zm9vYg", verbose);
           s_armour_test (self, "fooba", "Zm9vYmE", verbose);
           s_armour_test (self, "foobar", "Zm9vYmFy", verbose);
           zarmour_set_pad (self, true);
           if (verbose)
               zarmour_print (self);

           s_armour_test (self, "", "", verbose);
           s_armour_test (self, "f", "Zg==", verbose);
           s_armour_test (self, "fo", "Zm8=", verbose);
           s_armour_test (self, "foo", "Zm9v", verbose);
           s_armour_test (self, "foob", "Zm9vYg==", verbose);
           s_armour_test (self, "fooba", "Zm9vYmE=", verbose);
           s_armour_test (self, "foobar", "Zm9vYmFy", verbose);

           zarmour_set_pad (self, false);
           zarmour_set_mode (self, ZARMOUR_MODE_BASE64_URL);
           if (verbose)
               zarmour_print (self);

           s_armour_test (self, "", "", verbose);
           s_armour_test (self, "f", "Zg", verbose);
           s_armour_test (self, "fo", "Zm8", verbose);
           s_armour_test (self, "foo", "Zm9v", verbose);
           s_armour_test (self, "foob", "Zm9vYg", verbose);
           s_armour_test (self, "fooba", "Zm9vYmE", verbose);
           s_armour_test (self, "foobar", "Zm9vYmFy", verbose);
           zarmour_set_pad (self, true);
           if (verbose)
               zarmour_print (self);

           s_armour_test (self, "", "", verbose);
           s_armour_test (self, "f", "Zg==", verbose);
           s_armour_test (self, "fo", "Zm8=", verbose);
           s_armour_test (self, "foo", "Zm9v", verbose);
           s_armour_test (self, "foob", "Zm9vYg==", verbose);
           s_armour_test (self, "fooba", "Zm9vYmE=", verbose);
           s_armour_test (self, "foobar", "Zm9vYmFy", verbose);

           zarmour_set_pad (self, false);
           zarmour_set_mode (self, ZARMOUR_MODE_BASE32_STD);
           if (verbose)
               zarmour_print (self);

           s_armour_test (self, "", "", verbose);
           s_armour_test (self, "f", "MY", verbose);
           s_armour_test (self, "fo", "MZXQ", verbose);
           s_armour_test (self, "foo", "MZXW6", verbose);
           s_armour_test (self, "foob", "MZXW6YQ", verbose);
           s_armour_test (self, "fooba", "MZXW6YTB", verbose);
           s_armour_test (self, "foobar", "MZXW6YTBOI", verbose);
           s_armour_decode (self, "my", "f", verbose);
           s_armour_decode (self, "mzxq", "fo", verbose);
           s_armour_decode (self, "mzxw6", "foo", verbose);
           s_armour_decode (self, "mzxw6yq", "foob", verbose);
           s_armour_decode (self, "mzxw6ytb", "fooba", verbose);
           s_armour_decode (self, "mzxw6ytboi", "foobar", verbose);
           zarmour_set_pad (self, true);
           if (verbose)
               zarmour_print (self);

           s_armour_test (self, "", "", verbose);
           s_armour_test (self, "f", "MY======", verbose);
           s_armour_test (self, "fo", "MZXQ====", verbose);
           s_armour_test (self, "foo", "MZXW6===", verbose);
           s_armour_test (self, "foob", "MZXW6YQ=", verbose);
           s_armour_test (self, "fooba", "MZXW6YTB", verbose);
           s_armour_test (self, "foobar", "MZXW6YTBOI======", verbose);
           s_armour_decode (self, "my======", "f", verbose);
           s_armour_decode (self, "mzxq====", "fo", verbose);
           s_armour_decode (self, "mzxw6===", "foo", verbose);
           s_armour_decode (self, "mzxw6yq=", "foob", verbose);
           s_armour_decode (self, "mzxw6ytb", "fooba", verbose);
           s_armour_decode (self, "mzxw6ytboi======", "foobar", verbose);

           zarmour_set_pad (self, false);
           zarmour_set_mode (self, ZARMOUR_MODE_BASE32_HEX);
           if (verbose)
               zarmour_print (self);

           s_armour_test (self, "", "", verbose);
           s_armour_test (self, "f", "CO", verbose);
           s_armour_test (self, "fo", "CPNG", verbose);
           s_armour_test (self, "foo", "CPNMU", verbose);
           s_armour_test (self, "foob", "CPNMUOG", verbose);
           s_armour_test (self, "fooba", "CPNMUOJ1", verbose);
           s_armour_test (self, "foobar", "CPNMUOJ1E8", verbose);
           s_armour_decode (self, "co", "f", verbose);
           s_armour_decode (self, "cpng", "fo", verbose);
           s_armour_decode (self, "cpnmu", "foo", verbose);
           s_armour_decode (self, "cpnmuog", "foob", verbose);
           s_armour_decode (self, "cpnmuoj1", "fooba", verbose);
           s_armour_decode (self, "cpnmuoj1e8", "foobar", verbose);
           zarmour_set_pad (self, true);
           if (verbose)
               zarmour_print (self);

           s_armour_test (self, "", "", verbose);
           s_armour_test (self, "f", "CO======", verbose);
           s_armour_test (self, "fo", "CPNG====", verbose);
           s_armour_test (self, "foo", "CPNMU===", verbose);
           s_armour_test (self, "foob", "CPNMUOG=", verbose);
           s_armour_test (self, "fooba", "CPNMUOJ1", verbose);
           s_armour_test (self, "foobar", "CPNMUOJ1E8======", verbose);
           s_armour_decode (self, "co======", "f", verbose);
           s_armour_decode (self, "cpng====", "fo", verbose);
           s_armour_decode (self, "cpnmu===", "foo", verbose);
           s_armour_decode (self, "cpnmuog=", "foob", verbose);
           s_armour_decode (self, "cpnmuoj1", "fooba", verbose);
           s_armour_decode (self, "cpnmuoj1e8======", "foobar", verbose);
           zarmour_set_pad (self, true);

           zarmour_set_mode (self, ZARMOUR_MODE_BASE16);
           if (verbose)
               zarmour_print (self);

           s_armour_test (self, "", "", verbose);
           s_armour_test (self, "f", "66", verbose);
           s_armour_test (self, "fo", "666F", verbose);
           s_armour_test (self, "foo", "666F6F", verbose);
           s_armour_test (self, "foob", "666F6F62", verbose);
           s_armour_test (self, "fooba", "666F6F6261", verbose);
           s_armour_test (self, "foobar", "666F6F626172", verbose);
           s_armour_decode (self, "666f", "fo", verbose);
           s_armour_decode (self, "666f6f", "foo", verbose);
           s_armour_decode (self, "666f6f62", "foob", verbose);
           s_armour_decode (self, "666f6f6261", "fooba", verbose);
           s_armour_decode (self, "666f6f626172", "foobar", verbose);

           #ifdef _INCLUDE_Z85
           //  Z85 test is homemade; using 0, 4 and 8 bytes, with precalculated
           //  test vectors created with a libzmq test.
           //  ----------------------------------------------------------------

           //  Make a fake curve key from hex (base16) string, making sure
           //  there are no null bytes inside, so we can use our test utility
           zarmour_set_mode (self, ZARMOUR_MODE_BASE16);
           zarmour_set_line_breaks (self, false);

           zchunk_t *chunk = zarmour_decode (self,
               "4E6F87E2FB6EB22A1EF5E257B75D79124949565F0B8B36A878A4F03111C96E0B");
           assert (chunk);

           zarmour_set_mode (self, ZARMOUR_MODE_Z85);  //  Z85 mode does not support padding or line breaks
           zarmour_set_pad (self, false);              //  so these two are superfluous;
           zarmour_set_line_breaks (self, false);      //  just for consistency
           if (verbose)
               zarmour_print (self);

           s_armour_test (self, "", "", verbose);
           s_armour_test (self, "foob", "w]zP%", verbose);
           s_armour_test (self, "foobar!!", "w]zP%vr9Im", verbose);
           s_armour_test (self, (char *) zchunk_data (chunk),
                          "ph+{E}!&X?9}!I]W{sm(nL8@&3Yu{wC+<*-5Y[[#", verbose);
           zchunk_destroy (&chunk);
           #endif

           //  Armouring longer byte array to test line breaks
           zarmour_set_pad (self, true);
           zarmour_set_line_breaks (self, true);
           byte test_data [256];
           int index;
           for (index = 0; index < 256; index++)
               test_data [index] = index;

           zarmour_set_mode (self, ZARMOUR_MODE_BASE64_STD);
           s_armour_test_long (self, test_data, 256, verbose);
           zarmour_set_mode (self, ZARMOUR_MODE_BASE64_URL);
           s_armour_test_long (self, test_data, 256, verbose);
           zarmour_set_mode (self, ZARMOUR_MODE_BASE32_STD);
           s_armour_test_long (self, test_data, 256, verbose);
           zarmour_set_mode (self, ZARMOUR_MODE_BASE32_HEX);
           s_armour_test_long (self, test_data, 256, verbose);
           zarmour_set_mode (self, ZARMOUR_MODE_BASE16);
           s_armour_test_long (self, test_data, 256, verbose);
           #ifdef _INCLUDE_Z85
           zarmour_set_mode (self, ZARMOUR_MODE_Z85);
           s_armour_test_long (self, test_data, 256, verbose);
           #endif

           zarmour_destroy (&self);

           #if defined (__WINDOWS__)
           zsys_shutdown();
           #endif

AUTHORS

       The czmq manual was written by the authors in the AUTHORS file.

RESOURCES

       Main web site:

       Report bugs to the email <zeromq-dev@lists.zeromq.org[1]>

COPYRIGHT

       Copyright (c) the Contributors as noted in the AUTHORS file. This file is part of CZMQ,
       the high-level C binding for 0MQ: http://czmq.zeromq.org. This Source Code Form is subject
       to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not
       distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/. LICENSE
       included with the czmq distribution.

NOTES

        1. zeromq-dev@lists.zeromq.org
           mailto:zeromq-dev@lists.zeromq.org