SHA1_RK (community library)

Summary

Implementation of SHA1 hash algorithm for Particle devices

Example Build Testing

Library Read Me

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SHA1 Library

SHA1 hash implementation for Particle Devices

API

SHA1Init

// PROTOTYPE
void SHA1Init(SHA1_CTX* context);

Initialize the context structure. Call this to initialize or reuse a SHA1_CTX structure.

SHA1Update

// PROTOTYPE
void SHA1Update(SHA1_CTX* context, const unsigned char* data, u_int32_t len);

Updates the hash with additional data. You can call this repeatedly with the same ctx to add more data to the hash if the data arrives in buffers.

SHA1Final

// PROTOTYPE
void SHA1Final(unsigned char digest[20], SHA1_CTX* context);

Finalizes the hash calculation and stores the SHA1 digest in digest. The digest variable must point to a buffer of 20 bytes to hold the hash. It's always 20 bytes (160 bits) for SHA1, other SHA hash algorithms have longer digests.

SHA1_CTX

typedef struct {
u_int32_t state[5];
u_int32_t count[2];
unsigned char buffer[64];
} SHA1_CTX;

This structure (72 bytes) stores the state of the SHA1 has. Initialize it with SHA1Init.

Original Library

SHA-1 in C
By Steve Reid <steve@edmweb.com>
100% Public Domain

Found here: https://gist.github.com/jrabbit/1042021

Revision History

0.0.1 (2020-08-07)

• Initial version

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