Remove un-necessarry HMAC implementation, use SDK provided implementation
This commit is contained in:
Rick Watson
parent
079f134aa9
commit
a4220d631d
@ -6,13 +6,35 @@ void ArduinoJsonJWT::setSecret(String secret){
|
|||||||
_secret = secret;
|
_secret = secret;
|
||||||
}
|
}
|
||||||
|
|
||||||
String ArduinoJsonJWT::sign(String &value) {
|
/*
|
||||||
// create signature
|
* ESP32 uses mbedtls, ESP2866 uses bearssl.
|
||||||
Sha256.initHmac((uint8_t*) _secret.c_str(), _secret.length());
|
*
|
||||||
Sha256.print(value);
|
* Both come with decent HMAC implmentations supporting sha256, as well as others.
|
||||||
|
*
|
||||||
// trim and return
|
* No need to pull in additional crypto libraries - lets use what we already have.
|
||||||
return encode(Sha256.resultHmac(), 32);
|
*/
|
||||||
|
String ArduinoJsonJWT::sign(String &payload) {
|
||||||
|
unsigned char hmacResult[32];
|
||||||
|
{
|
||||||
|
#if defined(ESP_PLATFORM)
|
||||||
|
mbedtls_md_context_t ctx;
|
||||||
|
mbedtls_md_type_t md_type = MBEDTLS_MD_SHA256;
|
||||||
|
mbedtls_md_init(&ctx);
|
||||||
|
mbedtls_md_setup(&ctx, mbedtls_md_info_from_type(md_type), 1);
|
||||||
|
mbedtls_md_hmac_starts(&ctx, (unsigned char *) _secret.c_str(), _secret.length());
|
||||||
|
mbedtls_md_hmac_update(&ctx, (unsigned char *) payload.c_str(), payload.length());
|
||||||
|
mbedtls_md_hmac_finish(&ctx, hmacResult);
|
||||||
|
mbedtls_md_free(&ctx);
|
||||||
|
#else
|
||||||
|
br_hmac_key_context keyCtx;
|
||||||
|
br_hmac_key_init(&keyCtx, &br_sha256_vtable, _secret.c_str(), _secret.length());
|
||||||
|
br_hmac_context hmacCtx;
|
||||||
|
br_hmac_init(&hmacCtx, &keyCtx, 0);
|
||||||
|
br_hmac_update(&hmacCtx, payload.c_str(), payload.length());
|
||||||
|
br_hmac_out(&hmacCtx, hmacResult);
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
return encode(hmacResult, 32);
|
||||||
}
|
}
|
||||||
|
|
||||||
String ArduinoJsonJWT::decode(unsigned char * value) {
|
String ArduinoJsonJWT::decode(unsigned char * value) {
|
||||||
|
|||||||
@ -1,12 +1,17 @@
|
|||||||
#ifndef ArduinoJsonJWT_H
|
#ifndef ArduinoJsonJWT_H
|
||||||
#define ArduinoJsonJWT_H
|
#define ArduinoJsonJWT_H
|
||||||
|
|
||||||
#include "sha256.h"
|
|
||||||
#include "base64.h"
|
#include "base64.h"
|
||||||
|
|
||||||
#include <Arduino.h>
|
#include <Arduino.h>
|
||||||
#include <ArduinoJson.h>
|
#include <ArduinoJson.h>
|
||||||
|
|
||||||
|
#if defined(ESP_PLATFORM)
|
||||||
|
#include <mbedtls/md.h>
|
||||||
|
#else
|
||||||
|
#include <bearssl/bearssl_hmac.h>
|
||||||
|
#endif
|
||||||
|
|
||||||
#define JWT_HEADER_SIZE 36
|
#define JWT_HEADER_SIZE 36
|
||||||
#define JWT_SIG_SIZE 43
|
#define JWT_SIG_SIZE 43
|
||||||
|
|
||||||
|
|||||||
168
src/sha256.cpp
168
src/sha256.cpp
@ -1,168 +0,0 @@
|
|||||||
#include "sha256.h"
|
|
||||||
|
|
||||||
#include <string.h>
|
|
||||||
|
|
||||||
uint32_t sha256K[] PROGMEM = {
|
|
||||||
0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5,0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5,
|
|
||||||
0xd807aa98,0x12835b01,0x243185be,0x550c7dc3,0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174,
|
|
||||||
0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc,0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da,
|
|
||||||
0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7,0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967,
|
|
||||||
0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13,0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85,
|
|
||||||
0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3,0xd192e819,0xd6990624,0xf40e3585,0x106aa070,
|
|
||||||
0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5,0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3,
|
|
||||||
0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208,0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
|
|
||||||
};
|
|
||||||
|
|
||||||
#define BUFFER_SIZE 64
|
|
||||||
|
|
||||||
uint8_t sha256InitState[] PROGMEM = {
|
|
||||||
0x67,0xe6,0x09,0x6a, // H0
|
|
||||||
0x85,0xae,0x67,0xbb, // H1
|
|
||||||
0x72,0xf3,0x6e,0x3c, // H2
|
|
||||||
0x3a,0xf5,0x4f,0xa5, // H3
|
|
||||||
0x7f,0x52,0x0e,0x51, // H4
|
|
||||||
0x8c,0x68,0x05,0x9b, // H5
|
|
||||||
0xab,0xd9,0x83,0x1f, // H6
|
|
||||||
0x19,0xcd,0xe0,0x5b // H7
|
|
||||||
};
|
|
||||||
|
|
||||||
void Sha256Class::init(void) {
|
|
||||||
memcpy_P(state.b,sha256InitState,32);
|
|
||||||
byteCount = 0;
|
|
||||||
bufferOffset = 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
uint32_t Sha256Class::ror32(uint32_t number, uint8_t bits) {
|
|
||||||
return ((number << (32-bits)) | (number >> bits));
|
|
||||||
}
|
|
||||||
|
|
||||||
void Sha256Class::hashBlock() {
|
|
||||||
uint8_t i;
|
|
||||||
uint32_t a,b,c,d,e,f,g,h,t1,t2;
|
|
||||||
|
|
||||||
a=state.w[0];
|
|
||||||
b=state.w[1];
|
|
||||||
c=state.w[2];
|
|
||||||
d=state.w[3];
|
|
||||||
e=state.w[4];
|
|
||||||
f=state.w[5];
|
|
||||||
g=state.w[6];
|
|
||||||
h=state.w[7];
|
|
||||||
|
|
||||||
for (i=0; i<64; i++) {
|
|
||||||
if (i>=16) {
|
|
||||||
t1 = buffer.w[i&15] + buffer.w[(i-7)&15];
|
|
||||||
t2 = buffer.w[(i-2)&15];
|
|
||||||
t1 += ror32(t2,17) ^ ror32(t2,19) ^ (t2>>10);
|
|
||||||
t2 = buffer.w[(i-15)&15];
|
|
||||||
t1 += ror32(t2,7) ^ ror32(t2,18) ^ (t2>>3);
|
|
||||||
buffer.w[i&15] = t1;
|
|
||||||
}
|
|
||||||
t1 = h;
|
|
||||||
t1 += ror32(e,6) ^ ror32(e,11) ^ ror32(e,25); // ∑1(e)
|
|
||||||
t1 += g ^ (e & (g ^ f)); // Ch(e,f,g)
|
|
||||||
t1 += pgm_read_dword(sha256K+i); // Ki
|
|
||||||
t1 += buffer.w[i&15]; // Wi
|
|
||||||
t2 = ror32(a,2) ^ ror32(a,13) ^ ror32(a,22); // ∑0(a)
|
|
||||||
t2 += ((b & c) | (a & (b | c))); // Maj(a,b,c)
|
|
||||||
h=g; g=f; f=e; e=d+t1; d=c; c=b; b=a; a=t1+t2;
|
|
||||||
}
|
|
||||||
state.w[0] += a;
|
|
||||||
state.w[1] += b;
|
|
||||||
state.w[2] += c;
|
|
||||||
state.w[3] += d;
|
|
||||||
state.w[4] += e;
|
|
||||||
state.w[5] += f;
|
|
||||||
state.w[6] += g;
|
|
||||||
state.w[7] += h;
|
|
||||||
}
|
|
||||||
|
|
||||||
void Sha256Class::addUncounted(uint8_t data) {
|
|
||||||
buffer.b[bufferOffset ^ 3] = data;
|
|
||||||
bufferOffset++;
|
|
||||||
if (bufferOffset == BUFFER_SIZE) {
|
|
||||||
hashBlock();
|
|
||||||
bufferOffset = 0;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
size_t Sha256Class::write(uint8_t data) {
|
|
||||||
++byteCount;
|
|
||||||
addUncounted(data);
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
void Sha256Class::pad() {
|
|
||||||
// Implement SHA-256 padding (fips180-2 §5.1.1)
|
|
||||||
|
|
||||||
// Pad with 0x80 followed by 0x00 until the end of the block
|
|
||||||
addUncounted(0x80);
|
|
||||||
while (bufferOffset != 56) addUncounted(0x00);
|
|
||||||
|
|
||||||
// Append length in the last 8 bytes
|
|
||||||
addUncounted(0); // We're only using 32 bit lengths
|
|
||||||
addUncounted(0); // But SHA-1 supports 64 bit lengths
|
|
||||||
addUncounted(0); // So zero pad the top bits
|
|
||||||
addUncounted(byteCount >> 29); // Shifting to multiply by 8
|
|
||||||
addUncounted(byteCount >> 21); // as SHA-1 supports bitstreams as well as
|
|
||||||
addUncounted(byteCount >> 13); // byte.
|
|
||||||
addUncounted(byteCount >> 5);
|
|
||||||
addUncounted(byteCount << 3);
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
uint8_t* Sha256Class::result(void) {
|
|
||||||
// Pad to complete the last block
|
|
||||||
pad();
|
|
||||||
|
|
||||||
// Swap byte order back
|
|
||||||
for (int i=0; i<8; i++) {
|
|
||||||
uint32_t a,b;
|
|
||||||
a=state.w[i];
|
|
||||||
b=a<<24;
|
|
||||||
b|=(a<<8) & 0x00ff0000;
|
|
||||||
b|=(a>>8) & 0x0000ff00;
|
|
||||||
b|=a>>24;
|
|
||||||
state.w[i]=b;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Return pointer to hash (20 characters)
|
|
||||||
return state.b;
|
|
||||||
}
|
|
||||||
|
|
||||||
#define HMAC_IPAD 0x36
|
|
||||||
#define HMAC_OPAD 0x5c
|
|
||||||
|
|
||||||
uint8_t keyBuffer[BLOCK_LENGTH]; // K0 in FIPS-198a
|
|
||||||
uint8_t innerHash[HASH_LENGTH];
|
|
||||||
|
|
||||||
void Sha256Class::initHmac(const uint8_t* key, int keyLength) {
|
|
||||||
uint8_t i;
|
|
||||||
memset(keyBuffer,0,BLOCK_LENGTH);
|
|
||||||
if (keyLength > BLOCK_LENGTH) {
|
|
||||||
// Hash long keys
|
|
||||||
init();
|
|
||||||
for (;keyLength--;) write(*key++);
|
|
||||||
memcpy(keyBuffer,result(),HASH_LENGTH);
|
|
||||||
} else {
|
|
||||||
// Block length keys are used as is
|
|
||||||
memcpy(keyBuffer,key,keyLength);
|
|
||||||
}
|
|
||||||
// Start inner hash
|
|
||||||
init();
|
|
||||||
for (i=0; i<BLOCK_LENGTH; i++) {
|
|
||||||
write(keyBuffer[i] ^ HMAC_IPAD);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
uint8_t* Sha256Class::resultHmac(void) {
|
|
||||||
uint8_t i;
|
|
||||||
// Complete inner hash
|
|
||||||
memcpy(innerHash,result(),HASH_LENGTH);
|
|
||||||
// Calculate outer hash
|
|
||||||
init();
|
|
||||||
for (i=0; i<BLOCK_LENGTH; i++) write(keyBuffer[i] ^ HMAC_OPAD);
|
|
||||||
for (i=0; i<HASH_LENGTH; i++) write(innerHash[i]);
|
|
||||||
return result();
|
|
||||||
}
|
|
||||||
Sha256Class Sha256;
|
|
||||||
42
src/sha256.h
42
src/sha256.h
@ -1,42 +0,0 @@
|
|||||||
#ifndef Sha256_h
|
|
||||||
#define Sha256_h
|
|
||||||
|
|
||||||
#include <inttypes.h>
|
|
||||||
#include "Print.h"
|
|
||||||
|
|
||||||
#define HASH_LENGTH 32
|
|
||||||
#define BLOCK_LENGTH 64
|
|
||||||
|
|
||||||
union _buffer {
|
|
||||||
uint8_t b[BLOCK_LENGTH];
|
|
||||||
uint32_t w[BLOCK_LENGTH/4];
|
|
||||||
};
|
|
||||||
union _state {
|
|
||||||
uint8_t b[HASH_LENGTH];
|
|
||||||
uint32_t w[HASH_LENGTH/4];
|
|
||||||
};
|
|
||||||
|
|
||||||
class Sha256Class : public Print
|
|
||||||
{
|
|
||||||
public:
|
|
||||||
void init(void);
|
|
||||||
void initHmac(const uint8_t* secret, int secretLength);
|
|
||||||
uint8_t* result(void);
|
|
||||||
uint8_t* resultHmac(void);
|
|
||||||
virtual size_t write(uint8_t);
|
|
||||||
using Print::write;
|
|
||||||
private:
|
|
||||||
void pad();
|
|
||||||
void addUncounted(uint8_t data);
|
|
||||||
void hashBlock();
|
|
||||||
uint32_t ror32(uint32_t number, uint8_t bits);
|
|
||||||
_buffer buffer;
|
|
||||||
uint8_t bufferOffset;
|
|
||||||
_state state;
|
|
||||||
uint32_t byteCount;
|
|
||||||
uint8_t keyBuffer[BLOCK_LENGTH];
|
|
||||||
uint8_t innerHash[HASH_LENGTH];
|
|
||||||
};
|
|
||||||
extern Sha256Class Sha256;
|
|
||||||
|
|
||||||
#endif
|
|
||||||
Loading…
Reference in New Issue
Block a user