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RogueMaster
42 lines
959 B
C
42 lines
959 B
C
#pragma once
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#include <stdlib.h>
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#include <stdint.h>
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#define OTP_ERROR (0)
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/*
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Must compute HMAC using passed arguments,
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output as char array through output.
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key is secret key.
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input is input number.
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output is an output buffer of the resulting HMAC operation.
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Must return 0 if error, or the length in bytes of the HMAC operation.
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*/
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typedef int (*TOTP_ALGO)(const uint8_t* key, uint8_t key_length, const uint8_t* input, uint8_t input_length, uint8_t* output);
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/*
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Computes HMAC using SHA1
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*/
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extern const TOTP_ALGO TOTP_ALGO_SHA1;
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/*
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Computes HMAC using SHA256
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*/
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extern const TOTP_ALGO TOTP_ALGO_SHA256;
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/*
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Computes HMAC using SHA512
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*/
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extern const TOTP_ALGO TOTP_ALGO_SHA512;
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/*
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Computes TOTP token
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Returns:
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TOTP token on success
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0 otherwise
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*/
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uint32_t totp_at(TOTP_ALGO algo, uint8_t digits, const uint8_t* plain_secret, uint8_t plain_secret_length, uint64_t for_time, float timezone, uint8_t interval);
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