sha1.h File Reference

SHA-1 (FIPS 180-4) - one-shot digest. More...

#include <stddef.h>
#include <stdint.h>

Go to the source code of this file.

Macros
#define	PC_SHA1_DIGEST_LEN   20
	SHA-1 digest length in bytes.

Functions
void	pc_sha1 (const uint8_t *data, size_t len, uint8_t digest[PC_SHA1_DIGEST_LEN])
	Compute a SHA-1 digest over an arbitrary byte buffer.

Detailed Description

SHA-1 (FIPS 180-4) - one-shot digest.

The shared SHA-1 primitive. On Arduino (ESP32) delegates to mbedtls_sha1() (hardware SHA accelerator); on native builds a portable software implementation is used. Used for the WebSocket opening handshake (RFC 6455 §4.2.2) and other legacy digest needs. Output is always 20 bytes.

Author

Douglas Quigg (dstroy0)

Date

2026

Definition in file sha1.h.

Macro Definition Documentation

PC_SHA1_DIGEST_LEN

#define PC_SHA1_DIGEST_LEN   20

SHA-1 digest length in bytes.

Definition at line 23 of file sha1.h.

Function Documentation

pc_sha1()

void pc_sha1	(	const uint8_t *	data,
		size_t	len,
		uint8_t	digest[PC_SHA1_DIGEST_LEN]
	)

Compute a SHA-1 digest over an arbitrary byte buffer.

Parameters

data	Input bytes.
len	Number of input bytes.
digest	Output buffer; must be at least PC_SHA1_DIGEST_LEN bytes.

Definition at line 26 of file sha1.cpp.