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/* Find the first instance of a character in `subject` which is not in the
* base32 alphabet.
* Returns the offset into `subject` of the first such character, or -1
* if no such character exists in the string
*/
int check_base32(char *);
/* Simple and reliable base32 algorithm - "old trusty"
* Note: This is not a general base32 algorithm; it outputs only the
* first 16 base32 symbols of the input buffer, using only the first
* 20 bytes of that buffer.
*/
void onion_base32(char [16], unsigned char (*));
/* Simple algorithm to decode a 16-byte base32 sequence to the 10 bytes
* it represents, placing the result in dec */
void onion_base32_dec(unsigned char [10], char[16]);
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