From 97ea628484be522734d074995555ffcf3884a0e0 Mon Sep 17 00:00:00 2001 From: Michael Brown Date: Fri, 28 May 2010 12:42:00 +0100 Subject: [base64] Add ability to decode base64 strings Inspired-by: Piotr Jaroszyński Signed-off-by: Michael Brown --- src/include/ipxe/base64.h | 15 +++++++++++++++ src/include/ipxe/errfile.h | 1 + 2 files changed, 16 insertions(+) (limited to 'src/include') diff --git a/src/include/ipxe/base64.h b/src/include/ipxe/base64.h index 88c91563e..5fe134dc8 100644 --- a/src/include/ipxe/base64.h +++ b/src/include/ipxe/base64.h @@ -10,6 +10,7 @@ FILE_LICENCE ( GPL2_OR_LATER ); #include +#include /** * 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 */ diff --git a/src/include/ipxe/errfile.h b/src/include/ipxe/errfile.h index 286481362..c62a5b7d3 100644 --- a/src/include/ipxe/errfile.h +++ b/src/include/ipxe/errfile.h @@ -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 ) -- cgit v1.2.3-55-g7522