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M5-ProductExampleCodes/AtomBase/AtomHub/Arduino_LED_Hap/crypto.c
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vany5921 a6bb8ab100 add example
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#include <string.h>
// #include "user_settings.h"
#include <wolfssl.h>
#include <wolfssl/ssl.h>
#include <wolfssl/wolfcrypt/hmac.h>
#include <wolfssl/wolfcrypt/ed25519.h>
#include <wolfssl/wolfcrypt/curve25519.h>
#include <wolfssl/wolfcrypt/sha512.h>
#include <wolfssl/wolfcrypt/chacha20_poly1305.h>
#include <wolfssl/wolfcrypt/srp.h>
#include <wolfssl/wolfcrypt/error-crypt.h>
#include "port_x.h"
#include "port.h"
#include "debug.h"
#ifndef ARDUINO8266_SERVER_X
// 3072-bit group N (per RFC5054, Appendix A)
const byte N[] = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc9, 0x0f, 0xda, 0xa2,
0x21, 0x68, 0xc2, 0x34, 0xc4, 0xc6, 0x62, 0x8b, 0x80, 0xdc, 0x1c, 0xd1,
0x29, 0x02, 0x4e, 0x08, 0x8a, 0x67, 0xcc, 0x74, 0x02, 0x0b, 0xbe, 0xa6,
0x3b, 0x13, 0x9b, 0x22, 0x51, 0x4a, 0x08, 0x79, 0x8e, 0x34, 0x04, 0xdd,
0xef, 0x95, 0x19, 0xb3, 0xcd, 0x3a, 0x43, 0x1b, 0x30, 0x2b, 0x0a, 0x6d,
0xf2, 0x5f, 0x14, 0x37, 0x4f, 0xe1, 0x35, 0x6d, 0x6d, 0x51, 0xc2, 0x45,
0xe4, 0x85, 0xb5, 0x76, 0x62, 0x5e, 0x7e, 0xc6, 0xf4, 0x4c, 0x42, 0xe9,
0xa6, 0x37, 0xed, 0x6b, 0x0b, 0xff, 0x5c, 0xb6, 0xf4, 0x06, 0xb7, 0xed,
0xee, 0x38, 0x6b, 0xfb, 0x5a, 0x89, 0x9f, 0xa5, 0xae, 0x9f, 0x24, 0x11,
0x7c, 0x4b, 0x1f, 0xe6, 0x49, 0x28, 0x66, 0x51, 0xec, 0xe4, 0x5b, 0x3d,
0xc2, 0x00, 0x7c, 0xb8, 0xa1, 0x63, 0xbf, 0x05, 0x98, 0xda, 0x48, 0x36,
0x1c, 0x55, 0xd3, 0x9a, 0x69, 0x16, 0x3f, 0xa8, 0xfd, 0x24, 0xcf, 0x5f,
0x83, 0x65, 0x5d, 0x23, 0xdc, 0xa3, 0xad, 0x96, 0x1c, 0x62, 0xf3, 0x56,
0x20, 0x85, 0x52, 0xbb, 0x9e, 0xd5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6d,
0x67, 0x0c, 0x35, 0x4e, 0x4a, 0xbc, 0x98, 0x04, 0xf1, 0x74, 0x6c, 0x08,
0xca, 0x18, 0x21, 0x7c, 0x32, 0x90, 0x5e, 0x46, 0x2e, 0x36, 0xce, 0x3b,
0xe3, 0x9e, 0x77, 0x2c, 0x18, 0x0e, 0x86, 0x03, 0x9b, 0x27, 0x83, 0xa2,
0xec, 0x07, 0xa2, 0x8f, 0xb5, 0xc5, 0x5d, 0xf0, 0x6f, 0x4c, 0x52, 0xc9,
0xde, 0x2b, 0xcb, 0xf6, 0x95, 0x58, 0x17, 0x18, 0x39, 0x95, 0x49, 0x7c,
0xea, 0x95, 0x6a, 0xe5, 0x15, 0xd2, 0x26, 0x18, 0x98, 0xfa, 0x05, 0x10,
0x15, 0x72, 0x8e, 0x5a, 0x8a, 0xaa, 0xc4, 0x2d, 0xad, 0x33, 0x17, 0x0d,
0x04, 0x50, 0x7a, 0x33, 0xa8, 0x55, 0x21, 0xab, 0xdf, 0x1c, 0xba, 0x64,
0xec, 0xfb, 0x85, 0x04, 0x58, 0xdb, 0xef, 0x0a, 0x8a, 0xea, 0x71, 0x57,
0x5d, 0x06, 0x0c, 0x7d, 0xb3, 0x97, 0x0f, 0x85, 0xa6, 0xe1, 0xe4, 0xc7,
0xab, 0xf5, 0xae, 0x8c, 0xdb, 0x09, 0x33, 0xd7, 0x1e, 0x8c, 0x94, 0xe0,
0x4a, 0x25, 0x61, 0x9d, 0xce, 0xe3, 0xd2, 0x26, 0x1a, 0xd2, 0xee, 0x6b,
0xf1, 0x2f, 0xfa, 0x06, 0xd9, 0x8a, 0x08, 0x64, 0xd8, 0x76, 0x02, 0x73,
0x3e, 0xc8, 0x6a, 0x64, 0x52, 0x1f, 0x2b, 0x18, 0x17, 0x7b, 0x20, 0x0c,
0xbb, 0xe1, 0x17, 0x57, 0x7a, 0x61, 0x5d, 0x6c, 0x77, 0x09, 0x88, 0xc0,
0xba, 0xd9, 0x46, 0xe2, 0x08, 0xe2, 0x4f, 0xa0, 0x74, 0xe5, 0xab, 0x31,
0x43, 0xdb, 0x5b, 0xfc, 0xe0, 0xfd, 0x10, 0x8e, 0x4b, 0x82, 0xd1, 0x20,
0xa9, 0x3a, 0xd2, 0xca, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
};
// 3072-bit group generator (per RFC5054, Appendix A)
const byte g[] = {0x05};
#else
//1024 - bit Group
const byte N[] = {
0xEE, 0xAF, 0x0A, 0xB9, 0xAD, 0xB3, 0x8D, 0xD6, 0x9C, 0x33, 0xF8, 0x0A, 0xFA, 0x8F,
0xC5, 0xE8, 0x60, 0x72, 0x61, 0x87, 0x75, 0xFF, 0x3C, 0x0B, 0x9E, 0xA2, 0x31, 0x4C,
0x9C, 0x25, 0x65, 0x76, 0xD6, 0x74, 0xDF, 0x74, 0x96, 0xEA, 0x81, 0xD3, 0x38, 0x3B,
0x48, 0x13, 0xD6, 0x92, 0xC6, 0xE0, 0xE0, 0xD5, 0xD8, 0xE2, 0x50, 0xB9, 0x8B, 0xE4,
0x8E, 0x49, 0x5C, 0x1D, 0x60, 0x89, 0xDA, 0xD1, 0x5D, 0xC7, 0xD7, 0xB4, 0x61, 0x54,
0xD6, 0xB6, 0xCE, 0x8E, 0xF4, 0xAD, 0x69, 0xB1, 0x5D, 0x49, 0x82, 0x55, 0x9B, 0x29,
0x7B, 0xCF, 0x18, 0x85, 0xC5, 0x29, 0xF5, 0x66, 0x66, 0x0E, 0x57, 0xEC, 0x68, 0xED,
0xBC, 0x3C, 0x05, 0x72, 0x6C, 0xC0, 0x2F, 0xD4, 0xCB, 0xF4, 0x97, 0x6E, 0xAA, 0x9A,
0xFD, 0x51, 0x38, 0xFE, 0x83, 0x76, 0x43, 0x5B, 0x9F, 0xC6, 0x1D, 0x2F, 0xC0, 0xEB,
0x06, 0xE3 };
// 1024-bit group generator (per RFC5054, Appendix A)
const byte g[]={ 0x02 };
#endif
int wc_SrpSetKeyH(Srp *srp, byte *secret, word32 size) {
SrpHash hash;
int r = BAD_FUNC_ARG;
srp->key = (byte*) XMALLOC(WC_SHA512_DIGEST_SIZE, NULL, DYNAMIC_TYPE_SRP);
if (!srp->key)
return MEMORY_E;
srp->keySz = WC_SHA512_DIGEST_SIZE;
r = wc_InitSha512(&hash.data.sha512);
if (!r) r = wc_Sha512Update(&hash.data.sha512, secret, size);
if (!r) r = wc_Sha512Final(&hash.data.sha512, srp->key);
// clean up hash data from stack for security
memset(&hash, 0, sizeof(hash));
return r;
}
Srp *crypto_srp_new() {
DEBUG("crypto_srp_new");
Srp *srp = malloc(sizeof(Srp));
DEBUG("Initializing SRP");
int r = wc_SrpInit(srp, SRP_TYPE_SHA512, SRP_CLIENT_SIDE);
if (r) {
DEBUG("Failed to initialize SRP (code %d)", r);
return NULL;
}
srp->keyGenFunc_cb = wc_SrpSetKeyH;
return srp;
}
void crypto_srp_free(Srp *srp) {
wc_SrpTerm(srp);
free(srp);
}
int crypto_srp_init(Srp *srp, const char *username, const char *password) {
// INFO("Generating salt");
byte salt[16];
homekit_random_fill(salt, sizeof(salt));
int r;
//INFO("Setting SRP username");
r = wc_SrpSetUsername(srp, (byte*)username, strlen(username));
if (r) {
DEBUG("Failed to set SRP username (code %d)", r);
return r;
}
//INFO("Setting SRP params");
r = wc_SrpSetParams(srp, N, sizeof(N), g, sizeof(g), salt, sizeof(salt));
if (r) {
DEBUG("Failed to set SRP params (code %d)", r);
return r;
}
//INFO("Setting SRP password");
r = wc_SrpSetPassword(srp, (byte *)password, strlen(password));
if (r) {
INFO("Failed to set SRP password (code %d)", r);
return r;
}
//INFO("Getting SRP verifier");
word32 verifierLen = 1024;
byte *verifier = malloc(verifierLen);
//INFO("Getting SRP verifier allocated %d",(int)verifier);
INFO_HEAP();
r = wc_SrpGetVerifier(srp, verifier, &verifierLen);
//INFO("Getting SRP verifier done");
if (r) {
DEBUG("Failed to get SRP verifier (code %d)", r);
free(verifier);
return r;
}
srp->side = SRP_SERVER_SIDE;
//INFO("Setting SRP verifier");
r = wc_SrpSetVerifier(srp, verifier, verifierLen);
if (r) {
INFO("Failed to set SRP verifier (code %d)", r);
free(verifier);
return r;
}
free(verifier);
return 0;
}
int crypto_srp_get_salt(Srp *srp, byte *buffer, size_t *buffer_size) {
if (buffer_size == NULL)
return -1;
if (*buffer_size < srp->saltSz) {
*buffer_size = srp->saltSz;
return -2;
}
memcpy(buffer, srp->salt, srp->saltSz);
*buffer_size = srp->saltSz;
return 0;
}
int crypto_srp_get_public_key(Srp *srp, byte *buffer, size_t *buffer_size) {
if (buffer_size == NULL)
return -1;
//INFO("crypto_srp_get_public_key buffer_size=%d", *buffer_size);
// TODO: Fix hardcoded public key size
#ifdef ARDUINO8266_SERVER_X
if (*buffer_size < 128) {
*buffer_size = 128;
return -2;
}
#else
if (*buffer_size < 384) {
*buffer_size = 384;
return -2;
}
#endif
word32 len = *buffer_size;
INFO("Calculating public key len=%d",len);
int r = wc_SrpGetPublic(srp, buffer, &len);
INFO("Calculating public key result %d",r);
*buffer_size = len;
return r;
}
int crypto_srp_compute_key(
Srp *srp,
const byte *client_public_key, size_t client_public_key_size,
const byte *server_public_key, size_t server_public_key_size
) {
int r = wc_SrpComputeKey(
srp,
(byte *)client_public_key, client_public_key_size,
(byte *)server_public_key, server_public_key_size
);
if (r) {
DEBUG("Failed to generate SRP shared secret key (code %d)", r);
return r;
}
return 0;
}
int crypto_srp_verify(Srp *srp, const byte *proof, size_t proof_size) {
int r = wc_SrpVerifyPeersProof(srp, (byte *)proof, proof_size);
if (r) {
DEBUG("Failed to verify client SRP proof (code %d)", r);
return r;
}
return 0;
}
int crypto_srp_get_proof(Srp *srp, byte *proof, size_t *proof_size) {
if (proof_size == NULL)
return -1;
if (*proof_size < WC_SHA512_DIGEST_SIZE) {
*proof_size = WC_SHA512_DIGEST_SIZE;
return -2;
}
word32 proof_len = *proof_size;
int r = wc_SrpGetProof(srp, proof, &proof_len);
*proof_size = proof_len;
return r;
}
int crypto_hkdf(
const byte *key, size_t key_size,
const byte *salt, size_t salt_size,
const byte *info, size_t info_size,
byte *output, size_t *output_size
) {
if (output_size == NULL)
return -1;
if (*output_size < 32) {
*output_size = 32;
return -2;
}
*output_size = 32;
int r = wc_HKDF(
SHA512,
key, key_size,
salt, salt_size,
info, info_size,
output, *output_size
);
return r;
}
int crypto_srp_hkdf(
Srp *srp,
const byte *salt, size_t salt_size,
const byte *info, size_t info_size,
byte *output, size_t *output_size
) {
return crypto_hkdf(
srp->key, srp->keySz,
salt, salt_size,
info, info_size,
output, output_size
);
}
int crypto_chacha20poly1305_decrypt(
const byte *key, const byte *nonce, const byte *aad, size_t aad_size,
const byte *message, size_t message_size,
byte *decrypted, size_t *decrypted_size
) {
if (message_size <= CHACHA20_POLY1305_AEAD_AUTHTAG_SIZE) {
DEBUG("Decrypted message is too small");
return -2;
}
if (decrypted_size == NULL)
return -1;
size_t len = message_size - CHACHA20_POLY1305_AEAD_AUTHTAG_SIZE;
if (*decrypted_size < len) {
*decrypted_size = len;
return -2;
}
*decrypted_size = len;
int r = wc_ChaCha20Poly1305_Decrypt(
key, nonce, aad, aad_size,
message, len, &message[len],
decrypted
);
return r;
}
int crypto_chacha20poly1305_encrypt(
const byte *key, const byte *nonce, const byte *aad, size_t aad_size,
const byte *message, size_t message_size,
byte *encrypted, size_t *encrypted_size
) {
if (encrypted_size == NULL)
return -1;
size_t len = message_size + CHACHA20_POLY1305_AEAD_AUTHTAG_SIZE;
if (*encrypted_size < len) {
*encrypted_size = len;
return -1;
}
*encrypted_size = len;
int r = wc_ChaCha20Poly1305_Encrypt(
key, nonce, aad, aad_size,
message, message_size,
encrypted, encrypted+message_size
);
return r;
}
ed25519_key *crypto_ed25519_new() {
ed25519_key *key = malloc(sizeof(ed25519_key));
int r = wc_ed25519_init(key);
if (r) {
free(key);
return NULL;
}
return key;
}
void crypto_ed25519_free(ed25519_key *key) {
if (key)
free(key);
}
ed25519_key *crypto_ed25519_generate() {
ed25519_key *key = crypto_ed25519_new();
DEBUG("crypto_ed25519_generate (keysize %d)", ED25519_KEY_SIZE);
if(!key)
DEBUG("FAILED to init key");
WC_RNG rng;
int r = wc_ed25519_make_key(&rng, ED25519_KEY_SIZE, key);
if (r) {
DEBUG("Failed to generate key (code %d)", r);
crypto_ed25519_free(key);
return NULL;
}
return key;
}
int crypto_ed25519_import_key(ed25519_key *key, const byte *data, size_t size) {
return wc_ed25519_import_private_key(
data, ED25519_KEY_SIZE,
data + ED25519_KEY_SIZE, ED25519_PUB_KEY_SIZE,
key
);
}
int crypto_ed25519_export_key(const ed25519_key *key, byte *buffer, size_t *size) {
if (size == NULL)
return -1;
if (*size < ED25519_KEY_SIZE + ED25519_PUB_KEY_SIZE) {
*size = ED25519_KEY_SIZE + ED25519_PUB_KEY_SIZE;
return -2;
}
word32 key_size = *size;
int r = wc_ed25519_export_private((ed25519_key *)key, buffer, &key_size);
*size = key_size;
return r;
}
int crypto_ed25519_import_public_key(ed25519_key *key, const byte *data, size_t size) {
return wc_ed25519_import_public(data, size, key);
}
int crypto_ed25519_export_public_key(const ed25519_key *key, byte *buffer, size_t *size) {
if (size == NULL) {
return -1;
}
if (*size < ED25519_PUB_KEY_SIZE) {
*size = ED25519_PUB_KEY_SIZE;
return -2;
}
word32 len = *size;
int r = wc_ed25519_export_public((ed25519_key *)key, buffer, &len);
*size = len;
return r;
}
int crypto_ed25519_sign(
const ed25519_key *key,
const byte *message, size_t message_size,
byte *signature, size_t *signature_size
) {
if (signature_size == NULL) {
return -1;
}
if (*signature_size < ED25519_SIG_SIZE) {
*signature_size = ED25519_SIG_SIZE;
return -2;
}
word32 len = *signature_size;
int r = wc_ed25519_sign_msg(
message, message_size,
signature, &len,
(ed25519_key *)key
);
*signature_size = len;
return r;
}
int crypto_ed25519_verify(
const ed25519_key *key,
const byte *message, size_t message_size,
const byte *signature, size_t signature_size
) {
int verified;
int r = wc_ed25519_verify_msg(
signature, signature_size,
message, message_size,
&verified, (ed25519_key *)key
);
return !r && !verified;
}
curve25519_key *crypto_curve25519_new() {
curve25519_key *key = malloc(sizeof(curve25519_key));
int r = wc_curve25519_init(key);
if (r) {
free(key);
return NULL;
}
return key;
}
void crypto_curve25519_free(curve25519_key *key) {
if (!key)
return;
wc_curve25519_free(key);
free(key);
}
curve25519_key *crypto_curve25519_generate() {
curve25519_key *key = crypto_curve25519_new();
if (!key)
return NULL;
WC_RNG rng;
int r = wc_curve25519_make_key(&rng, 32, key);
if (r) {
crypto_curve25519_free(key);
return NULL;
}
return key;
}
int crypto_curve25519_import_public(curve25519_key *key, const byte *data, size_t size) {
return wc_curve25519_import_public_ex(data, size, key, EC25519_LITTLE_ENDIAN);
}
int crypto_curve25519_export_public(const curve25519_key *key, byte *buffer, size_t *size) {
if (*size == 0) {
word32 len = 0;
int r = wc_curve25519_export_public_ex(
(curve25519_key *)key,
(byte *)&len, &len,
EC25519_LITTLE_ENDIAN
);
*size = len;
return r;
}
word32 len = *size;
int r = wc_curve25519_export_public_ex(
(curve25519_key *)key,
buffer, &len,
EC25519_LITTLE_ENDIAN
);
*size = len;
return r;
}
int crypto_curve25519_shared_secret(const curve25519_key *private_key, const curve25519_key *public_key, byte *buffer, size_t *size) {
if (*size < CURVE25519_KEYSIZE) {
*size = CURVE25519_KEYSIZE;
return -2;
}
word32 len = *size;
int r = wc_curve25519_shared_secret_ex(
(curve25519_key *)private_key,
(curve25519_key *)public_key,
buffer, &len, EC25519_LITTLE_ENDIAN
);
*size = len;
return r;
}
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