/* Copyright, License, & Warranty Disclaimer {{{ */ /* S3FS - Linux VFS Module for Amazon S3 * Copyright (C) 2006 Jay Freeman (saurik) */ /* * Redistribution and use in source and binary * forms, with or without modification, are permitted * provided that the following conditions are met: * * 1. Redistributions of source code must retain the * above copyright notice, this list of conditions * and the following disclaimer. * 2. Redistributions in binary form must reproduce the * above copyright notice, this list of conditions * and the following disclaimer in the documentation * and/or other materials provided with the * distribution. * 3. The name of the author may not be used to endorse * or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* }}} */ /* Include Directives {{{ */ #ifdef __KERNEL__ #include #include #else #include #include #endif #include #include "base64.h" /* }}} */ static const char Characters_[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; void base64_encode(char *output, const uint8_t *data, size_t size) { size_t k; while (size != 0) { size_t remain = size < 3 ? size : 3; uint8_t next[3] = { 0, 0, 0 }; for (k = 0; k != remain; ++k) next[k] = *(data++); size -= remain; *(output++) = Characters_[next[0] >> 2]; *(output++) = Characters_[(next[0] & 0x03) << 4 | next[1] >> 4]; if (remain == 1) { *(output++) = '='; *(output++) = '='; break; } else { *(output++) = Characters_[(next[1] & 0x0f) << 2 | next[2] >> 6]; if (remain == 3) *(output++) = Characters_[next[2] & 0x3f]; else { *(output++) = '='; break; } } } }