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int _gnutls_base64_encode(const uint8 * data, size_t data_size, uint8 ** result);
int _gnutls_fbase64_encode(const char *msg, const uint8 * data, int data_size,
uint8 ** result);
int _gnutls_base64_decode(const uint8 * data, size_t data_size, uint8 ** result);
int _gnutls_fbase64_decode( const opaque* header, const uint8 * data, size_t data_size,
uint8 ** result);
#define B64SIZE( data_size) ((data_size%3==0)?((data_size*4)/3):(4+((data_size*4)/3)))
/* The size for B64 encoding + newlines plus header
*/
#define HEADSIZE( hsize) \
sizeof("-----BEGIN")-1+sizeof("-----\n")-1+ \
sizeof("\n-----END ")-1+sizeof("-----\n")-1+hsize+hsize
#define B64FSIZE( hsize, dsize) \
(B64SIZE(dsize) + HEADSIZE(hsize) + /*newlines*/ \
B64SIZE(dsize)/64 + (B64SIZE(dsize) % 64 > 0 ? 1 : 0))
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