base64.h File Reference

#include <freeradius-devel/missing.h>
#include <freeradius-devel/util/sbuff.h>
#include <freeradius-devel/util/dbuff.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <sys/types.h>

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Macros
#define	FR_BASE64_DEC_LENGTH(_inlen)   ((3 * ((_inlen) / 4)) + 2)
#define	fr_base64_decode(_out, _in, _expect_padding, _no_trailing)    fr_base64_decode_nstd(NULL, _out, _in, _expect_padding, _no_trailing, fr_base64_alphabet_decode)
#define	FR_BASE64_ENC_LENGTH(_inlen)   ((((_inlen) + 2) / 3) * 4)
	Encode/decode binary data using printable characters (base64 format)
#define	fr_base64_encode(_out, _in, _add_padding)    fr_base64_encode_nstd(_out, _in, _add_padding, fr_base64_alphabet_encode)
#define	fr_is_base64(_c)   fr_is_base64_nstd(_c, fr_base64_alphabet_decode)

Functions
ssize_t	fr_base64_decode_nstd (fr_sbuff_parse_error_t *err, fr_dbuff_t *out, fr_sbuff_t *in, bool expect_padding, bool no_trailing, uint8_t const alphabet[static UINT8_MAX]))
size_t	fr_base64_encode (char *restrict out, size_t outlen, uint8_t const *restrict in, size_t inlen)
ssize_t	fr_base64_encode_nstd (fr_sbuff_t *out, fr_dbuff_t *in, bool add_padding, char const alphabet[static UINT8_MAX])
	Base 64 encode binary data.
static bool	fr_is_base64_nstd (char c, uint8_t const alphabet[static UINT8_MAX])
	Check if char is in Base64 alphabet.

Variables
uint8_t const	fr_base64_alphabet_decode [UINT8_MAX]
char const	fr_base64_alphabet_encode [UINT8_MAX]
uint8_t const	fr_base64_url_alphabet_decode [UINT8_MAX]
char const	fr_base64_url_alphabet_encode [UINT8_MAX]

Macro Definition Documentation

FR_BASE64_DEC_LENGTH

#define FR_BASE64_DEC_LENGTH

(

_inlen

)

((3 * ((_inlen) / 4)) + 2)

Definition at line 44 of file base64.h.

fr_base64_decode

#define fr_base64_decode	(		_out,
			_in,
			_expect_padding,
			_no_trailing
	)		fr_base64_decode_nstd(NULL, _out, _in, _expect_padding, _no_trailing, fr_base64_alphabet_decode)

Definition at line 81 of file base64.h.

FR_BASE64_ENC_LENGTH

#define FR_BASE64_ENC_LENGTH

(

_inlen

)

((((_inlen) + 2) / 3) * 4)

Encode/decode binary data using printable characters (base64 format)

See also

RFC 4648 http://www.ietf.org/rfc/rfc4648.txt.

Copyright

2021 Arran Cudbard-Bell (a.cud.nosp@m.bard.nosp@m.b@fre.nosp@m.erad.nosp@m.ius.o.nosp@m.rg)

Definition at line 43 of file base64.h.

fr_base64_encode

#define fr_base64_encode	(		_out,
			_in,
			_add_padding
	)		fr_base64_encode_nstd(_out, _in, _add_padding, fr_base64_alphabet_encode)

Definition at line 74 of file base64.h.

fr_is_base64

#define fr_is_base64

(

_c

)

fr_is_base64_nstd(_c, fr_base64_alphabet_decode)

Definition at line 67 of file base64.h.

Function Documentation

fr_base64_decode_nstd()

ssize_t fr_base64_decode_nstd	(	fr_sbuff_parse_error_t *	err,
		fr_dbuff_t *	out,
		fr_sbuff_t *	in,
		bool	expect_padding,
		bool	no_trailing,
		uint8_t const	alphabet[static UINT8_MAX]
	)

Definition at line 401 of file base64.c.

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fr_base64_encode()

size_t fr_base64_encode	(	char *restrict	out,
		size_t	outlen,
		uint8_t const *restrict	in,
		size_t	inlen
	)

fr_base64_encode_nstd()

ssize_t fr_base64_encode_nstd	(	fr_sbuff_t *	out,
		fr_dbuff_t *	in,
		bool	add_padding,
		char const	alphabet[static UINT8_MAX]
	)

Base 64 encode binary data.

Base64 encode in bytes to base64, writing to out.

Parameters

[out]	out	Where to write Base64 string.
[in]	in	Data to encode.
[in]	add_padding	Add padding bytes.
[in]	alphabet	to use for encoding.

Returns

• Amount of data we wrote to the buffer.
• <0 the number of bytes we would have needed in the ouput buffer.

Definition at line 326 of file base64.c.

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fr_is_base64_nstd()

static bool fr_is_base64_nstd ( char  c, uint8_t const  alphabet[static UINT8_MAX]  )

inlinestatic

Check if char is in Base64 alphabet.

Note that '=' is padding and not considered to be part of the alphabet.

Parameters

[in]	c	char to check.
[in]	alphabet	to use.

Returns

• true if c is a character from the Base64 alphabet.
• false if character is not in the Base64 alphabet.

Definition at line 61 of file base64.h.

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Variable Documentation

fr_base64_alphabet_decode

uint8_t const fr_base64_alphabet_decode[UINT8_MAX]

extern

Definition at line 99 of file base64.c.

fr_base64_alphabet_encode

char const fr_base64_alphabet_encode[UINT8_MAX]

extern

Definition at line 32 of file base64.c.

fr_base64_url_alphabet_decode

uint8_t const fr_base64_url_alphabet_decode[UINT8_MAX]

extern

Definition at line 240 of file base64.c.

fr_base64_url_alphabet_encode

char const fr_base64_url_alphabet_encode[UINT8_MAX]

extern

Definition at line 173 of file base64.c.