/usr/include/b64/cdecode.h is in libb64-dev 1.2-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | /*
cdecode.h - c header for a base64 decoding algorithm
This is part of the libb64 project, and has been placed in the public domain.
For details, see http://sourceforge.net/projects/libb64
*/
#ifndef BASE64_CDECODE_H
#define BASE64_CDECODE_H
typedef enum
{
step_a, step_b, step_c, step_d
} base64_decodestep;
typedef struct
{
base64_decodestep step;
char plainchar;
} base64_decodestate;
void base64_init_decodestate(base64_decodestate* state_in);
int base64_decode_value(char value_in);
int base64_decode_block(const char* code_in, const int length_in, char* plaintext_out, base64_decodestate* state_in);
#endif /* BASE64_CDECODE_H */
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