diff options
Diffstat (limited to 'qemu/roms/ipxe/src/include/ipxe/base64.h')
-rw-r--r-- | qemu/roms/ipxe/src/include/ipxe/base64.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/include/ipxe/base64.h b/qemu/roms/ipxe/src/include/ipxe/base64.h new file mode 100644 index 000000000..5fe134dc8 --- /dev/null +++ b/qemu/roms/ipxe/src/include/ipxe/base64.h @@ -0,0 +1,41 @@ +#ifndef _IPXE_BASE64_H +#define _IPXE_BASE64_H + +/** @file + * + * Base64 encoding + * + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +#include <stdint.h> +#include <string.h> + +/** + * Calculate length of base64-encoded data + * + * @v raw_len Raw data length + * @ret encoded_len Encoded string length (excluding NUL) + */ +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 */ |