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Michael Brown
97ea628484
Inspired-by: Piotr Jaroszyński <p.jaroszynski@gmail.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
42 lines
948 B
C
42 lines
948 B
C
#ifndef _IPXE_BASE64_H
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#define _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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FILE_LICENCE ( GPL2_OR_LATER );
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#include <stdint.h>
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#include <string.h>
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/**
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* Calculate length of base64-encoded data
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*
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* @v raw_len Raw data length
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* @ret encoded_len Encoded string length (excluding NUL)
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*/
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static inline size_t base64_encoded_len ( size_t raw_len ) {
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return ( ( ( raw_len + 3 - 1 ) / 3 ) * 4 );
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}
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/**
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* Calculate maximum length of base64-decoded string
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*
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* @v encoded Encoded string
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* @v max_raw_len Maximum length of raw data
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*
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* Note that the exact length of the raw data cannot be known until
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* the string is decoded.
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*/
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static inline size_t base64_decoded_max_len ( const char *encoded ) {
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return ( ( ( strlen ( encoded ) + 4 - 1 ) / 4 ) * 3 );
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}
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extern void base64_encode ( const uint8_t *raw, size_t len, char *encoded );
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extern int base64_decode ( const char *encoded, uint8_t *raw );
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#endif /* _IPXE_BASE64_H */
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