author Ryan C. Gordon <>
Sun, 18 Jun 2017 19:40:30 -0400
changeset 56 a573346e6f7b
parent 53 ea43dbad123b
permissions -rw-r--r--
Added One Time Password support.

This is only for time-based OTP for now ("TOPT" algorithm), but that's more
or less what one expects to see in the wild anyhow.

This is sort of a placeholder UI until I replace the entire existing UI with
something better.
/*	$OpenBSD: sha1.h,v 1.5 2007/09/10 22:19:42 henric Exp $	*/

 * SHA-1 in C
 * By Steve Reid <>
 * 100% Public Domain

#ifndef _SHA1_H_
#define _SHA1_H_

#define	SHA1_BLOCK_LENGTH		64
#define	SHA1_DIGEST_LENGTH		20

#include <stdint.h>

typedef struct {
	uint32_t	state[5];
	uint64_t	count;
	uint8_t	buffer[SHA1_BLOCK_LENGTH];
void SHA1Init(SHA1_CTX * context);
void SHA1Transform(uint32_t state[5], const uint8_t buffer[SHA1_BLOCK_LENGTH]);
void SHA1Update(SHA1_CTX *context, const uint8_t *data, const uint32_t len);
void SHA1Final(uint8_t digest[SHA1_DIGEST_LENGTH], SHA1_CTX *context);

void SHA1Hmac(const uint8_t *key, const uint32_t keylen, const uint8_t *msg, const uint32_t msglen, uint8_t digest[SHA1_DIGEST_LENGTH]);

#endif /* _SHA1_H_ */