8406115834
Access to the gpxe.org and etherboot.org domains and associated resources has been revoked by the registrant of the domain. Work around this problem by renaming project from gPXE to iPXE, and updating URLs to match. Also update README, LOG and COPYRIGHTS to remove obsolete information. Signed-off-by: Michael Brown <mcb30@ipxe.org>
69 lines
2.0 KiB
C
69 lines
2.0 KiB
C
/*
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* Copyright (C) 2009 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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FILE_LICENCE ( GPL2_OR_LATER );
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#include <stdint.h>
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#include <string.h>
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#include <assert.h>
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#include <ipxe/base64.h>
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/** @file
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*
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* Base64 encoding
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*
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*/
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static const char base64[64] =
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"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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/**
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* Base64-encode a string
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*
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* @v raw Raw string
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* @v encoded Buffer for encoded string
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*
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* The buffer must be the correct length for the encoded string. Use
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* something like
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*
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* char buf[ base64_encoded_len ( strlen ( raw ) ) + 1 ];
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*
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* (the +1 is for the terminating NUL) to provide a buffer of the
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* correct size.
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*/
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void base64_encode ( const char *raw, char *encoded ) {
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const uint8_t *raw_bytes = ( ( const uint8_t * ) raw );
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uint8_t *encoded_bytes = ( ( uint8_t * ) encoded );
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size_t raw_bit_len = ( 8 * strlen ( raw ) );
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unsigned int bit;
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unsigned int tmp;
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for ( bit = 0 ; bit < raw_bit_len ; bit += 6 ) {
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tmp = ( ( raw_bytes[ bit / 8 ] << ( bit % 8 ) ) |
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( raw_bytes[ bit / 8 + 1 ] >> ( 8 - ( bit % 8 ) ) ) );
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tmp = ( ( tmp >> 2 ) & 0x3f );
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*(encoded_bytes++) = base64[tmp];
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}
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for ( ; ( bit % 8 ) != 0 ; bit += 6 )
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*(encoded_bytes++) = '=';
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*(encoded_bytes++) = '\0';
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DBG ( "Base64-encoded \"%s\" as \"%s\"\n", raw, encoded );
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assert ( strlen ( encoded ) == base64_encoded_len ( strlen ( raw ) ) );
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}
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