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[base64] Add ability to decode base64 strings

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Inspired-by: Piotr Jaroszyński <p.jaroszynski@gmail.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2010-05-28 12:42:00 +01:00
parent dfcce165a5
commit 97ea628484
3 changed files with 101 additions and 0 deletions
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15
src/include/ipxe/base64.h
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@@ -10,6 +10,7 @@
FILE_LICENCE ( GPL2_OR_LATER );
#include <stdint.h>
#include <string.h>
/**
* Calculate length of base64-encoded data
@@ -21,6 +22,20 @@ static inline size_t base64_encoded_len ( size_t raw_len ) {
return ( ( ( raw_len + 3 - 1 ) / 3 ) * 4 );
}
/**
* Calculate maximum length of base64-decoded string
*
* @v encoded Encoded string
* @v max_raw_len Maximum length of raw data
*
* Note that the exact length of the raw data cannot be known until
* the string is decoded.
*/
static inline size_t base64_decoded_max_len ( const char *encoded ) {
return ( ( ( strlen ( encoded ) + 4 - 1 ) / 4 ) * 3 );
}
extern void base64_encode ( const uint8_t *raw, size_t len, char *encoded );
extern int base64_decode ( const char *encoded, uint8_t *raw );
#endif /* _IPXE_BASE64_H */

1
src/include/ipxe/errfile.h
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@@ -53,6 +53,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
#define ERRFILE_vsprintf ( ERRFILE_CORE | 0x000d0000 )
#define ERRFILE_xfer ( ERRFILE_CORE | 0x000e0000 )
#define ERRFILE_bitmap ( ERRFILE_CORE | 0x000f0000 )
#define ERRFILE_base64 ( ERRFILE_CORE | 0x00100000 )
#define ERRFILE_eisa ( ERRFILE_DRIVER | 0x00000000 )
#define ERRFILE_isa ( ERRFILE_DRIVER | 0x00010000 )