Adding runHash method

[luigigubello]

Cryptography is cool, but it is hard. I have added the method runHash() because I hope this is a user-friendly way to calculate a hash value. The user needs just to allocate memory for the output, give the input to runHash() and the method returns the output.

How to use

SHA256

runHash()

Giving the input text, this method returns the SHA256 hash.

Sintax

SHA256.runHash(input, inputLength, output);

Parameters

• input: the plain text. The variable type is uint8_t;
• inputLength: the plain text's length. The variable type is size_t;
• output: the SHA256 hash. It is always 32 bytes long. The variable type is size_t;

Example

#include <ArduinoBearSSL.h>
uint8_t input[8] = "Arduino";
uint8_t output[32];
void setup() {
  SHA256.runHash(input, 8, output);
}
void loop() {}

(similar for MD5 and SHA1)

[aentinger]

Hi @luigigubello :wave: I know you are probably busy but let's finish this PR up so it can be merged ;)

[aentinger]

Closing this PR due to lack of feedback.