bool MCCrypt_random_bytes(uint32_t p_bytecount, void *&r_bytes)
{
bool t_success = true;
unsigned char *t_bytes = nil;
t_success = InitSSLCrypt() == True;
if (t_success)
t_success = MCMemoryAllocate(p_bytecount, t_bytes);
if (t_success)
t_success = RAND_bytes(t_bytes, p_bytecount) == 1;
if (t_success)
r_bytes = t_bytes;
return t_success;
}
void MCSecurityEvalRandomBytes(MCExecContext& ctxt, uinteger_t p_byte_count, MCDataRef& r_bytes)
{
if (!InitSSLCrypt())
{
ctxt.LegacyThrow(EE_SECURITY_NOLIBRARY);
return;
}
if (MCSRandomData (p_byte_count, r_bytes))
{
ctxt.SetTheResultToEmpty();
return;
}
ctxt.SetTheResultToCString("error: could not get random bytes");
}
void SSL_ciphernames(MCExecPoint &ep)
{
#ifdef MCSSL
// MW-2004-12-29: Integrate Tuviah's fixes
static char sslcipherlist[] = "bf,128\nbf-cbc,128\nbf-cfb,128\nbf-ecb,128\nbf-ofb,128\nblowfish,128\ncast,128\ncast-cbc,128\ncast5-cbc,128\ncast5-cfb,128\ncast5-ecb,128\ncast5-ofb,128\ndes,64\ndes-cbc,64\ndes-cfb,64\ndes-ecb,64\ndes-ede,128\ndes-ede-cbc,128\ndes-ede-cfb,128\ndes-ede-ofb,128\ndes-ede3,192\ndes-ede3-cbc,192\ndes-ede3-cfb,192\ndes-ede3-ofb,192\ndes-ofb,64\ndes3,192\ndesx,192\ndesx-cbc,192\nrc2,128\nrc2-40-cbc,40\nrc2-64-cbc,64\nrc2-cbc,128\nrc2-cfb,128\nrc2-ecb,128\nrc2-ofb,128\nrc4,128\nrc4-40,40\nrc5,128\nrc5-cbc,128\nrc5-cfb,128\nrc5-ecb,128\nrc5-ofb,128";
isfirstcipher = True;
ep.clear();
if (!InitSSLCrypt())
{
char sslerrbuf[256];
SSLError(sslerrbuf);
MCresult->copysvalue(sslerrbuf);
}
else
OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH, list_ciphers_cb, &ep);
#else
// MW-2013-01-15: [[ Bug 10631 ]] Make sure we clear the return value if no
// SSL!
ep . clear();
#endif
}
//error buf should have a buffer of at least 256 bytes.
unsigned long SSLError(char *errbuf)
{
if (!InitSSLCrypt())
{
strcpy(errbuf,"ssl library not found");
return 0;
}
#ifdef MCSSL
unsigned long ecode = ERR_get_error();
if (errbuf)
{
if (ecode)
ERR_error_string_n(ecode,errbuf,255);
else
errbuf[0] = '\0';
}
return ecode;
#else
return 0;
#endif
}
Exec_stat MCIdeSign::exec(MCExecPoint& ep)
{
Exec_stat t_stat;
t_stat = ES_NORMAL;
// Clear the result as we return an error there
MCresult -> clear();
if (t_stat == ES_NORMAL)
t_stat = m_params -> eval(ep);
MCVariableValue *t_array;
if (t_stat == ES_NORMAL)
{
t_array = ep . getarray();
if (t_array == NULL)
return ES_ERROR;
}
MCExecPoint ep2(ep);
MCDeploySignParameters t_params;
memset(&t_params, 0, sizeof(MCDeploySignParameters));
if (t_stat == ES_NORMAL)
t_stat = fetch_opt_cstring(ep2, t_array, "passphrase", t_params . passphrase);
if (t_stat == ES_NORMAL)
t_stat = fetch_opt_filepath(ep2, t_array, "certificate", t_params . certificate);
if (t_stat == ES_NORMAL)
t_stat = fetch_opt_filepath(ep2, t_array, "privatekey", t_params . privatekey);
if (t_stat == ES_NORMAL)
t_stat = fetch_opt_filepath(ep2, t_array, "certstore", t_params . certstore);
if (t_stat == ES_NORMAL)
t_stat = fetch_opt_cstring(ep2, t_array, "timestamper", t_params . timestamper);
if (t_stat == ES_NORMAL)
t_stat = fetch_opt_cstring(ep2, t_array, "description", t_params . description);
if (t_stat == ES_NORMAL)
t_stat = fetch_opt_cstring(ep2, t_array, "url", t_params . url);
if (t_stat == ES_NORMAL)
t_stat = fetch_filepath(ep2, t_array, "input", t_params . input);
if (t_stat == ES_NORMAL)
t_stat = fetch_filepath(ep2, t_array, "output", t_params . output);
if (t_stat == ES_NORMAL)
if (t_params . certstore != NULL && (t_params . certificate != NULL || t_params . privatekey != NULL))
t_stat = ES_ERROR;
if (t_stat == ES_NORMAL)
if (t_params . certstore == NULL && (t_params . certificate == NULL || t_params . privatekey == NULL))
t_stat = ES_ERROR;
bool t_can_sign;
t_can_sign = true;
if (t_stat == ES_NORMAL && !InitSSLCrypt())
{
MCresult -> sets("could not initialize SSL");
t_can_sign = false;
}
if (t_can_sign && t_stat == ES_NORMAL)
{
if (m_platform == PLATFORM_WINDOWS)
MCDeploySignWindows(t_params);
MCDeployError t_error;
t_error = MCDeployCatch();
if (t_error != kMCDeployErrorNone)
MCresult -> sets(MCDeployErrorToString(t_error));
}
delete t_params . passphrase;
delete t_params . certificate;
delete t_params . privatekey;
delete t_params . certstore;
delete t_params . timestamper;
delete t_params . description;
delete t_params . url;
delete t_params . input;
delete t_params . output;
return t_stat;
}
char *SSL_encode(Boolean isdecrypt, char *ciphername,
const char *data, uint4 inlen,uint4 &outlen, //data to decrypt, length of that data, and pointer to descypted data length
const char *keystr, int4 keystrlen, Boolean ispassword, uint2 keylen,
const char *saltstr, uint2 saltlen, const char *ivstr, uint2 ivlen)
{ //password or key, optional key length
if (!InitSSLCrypt())
return NULL;
#ifdef MCSSL
// MW-2011-05-24: [[ Bug 9536 ]] The key length is a function of 'keylen' and for some ciphers
// can be larger than 32 bytes. For now, increase the buffer to 256 bytes given a maximum
// theoretical key length of 2048.
uint1 iv[EVP_MAX_IV_LENGTH], key[256];
if (keylen > 2048)
return NULL;
const EVP_CIPHER *cipher=EVP_get_cipherbyname(ciphername);
uint1 operation = isdecrypt ? 0: 1;
//get cipher object
if (!cipher)
{
outlen = 789;
return NULL;
}
static const char magic[]="Salted__";
int4 res = 0;
//set up cipher context
EVP_CIPHER_CTX ctx;
EVP_CIPHER_CTX_init(&ctx);
//init context with cipher and specify operation
if (EVP_CipherInit(&ctx, cipher,NULL, NULL, operation) == 0)
return NULL;
//try setting keylength if specified. This will fail for some ciphers.
if (keylen && EVP_CIPHER_CTX_set_key_length(&ctx, keylen/8) == 0)
return NULL;
//get new keylength in bytes
int4 curkeylength = EVP_CIPHER_CTX_key_length(&ctx);
//zero key and iv
memset(key,0,EVP_MAX_KEY_LENGTH);
memset(iv,0,EVP_MAX_IV_LENGTH);
//if password combine with salt value to generate key
unsigned char saltbuf[PKCS5_SALT_LEN];
memset(saltbuf,0,sizeof(saltbuf));
char *tend = (char *)data + inlen;
// MW-2004-12-02: Fix bug 2411 - a NULL salt should result in a random one being
// generated, if saltstr is NULL and saltlen is zero then the salt should
// be taken as being the empty string.
if (ispassword)
{
if (saltstr == NULL)
RAND_bytes(saltbuf, sizeof(saltbuf));
else
memcpy(saltbuf,saltstr,MCU_min(saltlen,PKCS5_SALT_LEN));
// MW-2004-12-02: We should only do this if we are decrypting
if (isdecrypt && inlen > sizeof(magic) && memcmp(data,magic,sizeof(magic)-1) == 0)
{
data += sizeof(magic) - 1;
if (saltstr == NULL || saltlen == 0)
memcpy(saltbuf,data,sizeof(saltbuf));
data += sizeof(saltbuf);
}
curkeylength = EVP_BytesToKey(cipher,EVP_md5(),(const unsigned char *)saltbuf,(unsigned char *)keystr,
keystrlen,1,key,iv);
}
else
{//otherwise copy to key
if (keystrlen != curkeylength)
{ //sanity check then passed wrong size for key
outlen = 790;
return NULL;
}
else
memcpy(key,keystr,curkeylength);
}
if (ivstr != NULL && ivlen > 0)
{
memset(iv,0,EVP_MAX_IV_LENGTH);
memcpy(iv,ivstr,MCU_min(ivlen,EVP_MAX_IV_LENGTH));
}
if (EVP_CipherInit(&ctx, NULL, key, iv, operation) == 0)
return NULL;
int4 tmp, ol;
ol = 0;
//allocate memory to hold encrypted/decrypted data + an extra block + null terminator for block ciphers.
unsigned char *outdata = (unsigned char *)malloc(inlen + EVP_CIPHER_CTX_block_size(&ctx) + 1 + sizeof(magic) + sizeof(saltbuf));
//do encryption/decryption
if (outdata == NULL)
{
outlen = 791;
return NULL;
}
// MW-2004-12-02: Only prepend the salt if we generated the key (i.e. password mode)
if (!isdecrypt && ispassword)
{
memcpy(&outdata[ol],magic,sizeof(magic)-1);
ol += sizeof(magic)-1;
memcpy(&outdata[ol],saltbuf,sizeof(saltbuf));
ol += sizeof(saltbuf);
}
// MW-2007-02-13: [[Bug 4258]] - SSL now fails an assertion if datalen == 0
if (tend - data > 0)
{
if (EVP_CipherUpdate(&ctx,&outdata[ol],&tmp,(unsigned char *)data,tend-data) == 0)
{
delete outdata;
return NULL;
}
ol += tmp;
}
//for padding
if (EVP_CipherFinal(&ctx,&outdata[ol],&tmp) == 0)
{
delete outdata;
return NULL;
}
outlen = ol + tmp;
//cleam up context and return data
EVP_CIPHER_CTX_cleanup(&ctx);
outdata[outlen] = 0; //null terminate data
return (char *)outdata;
#else
return NULL;
#endif
}
bool MCCrypt_rsa_op(bool p_encrypt, RSA_KEYTYPE p_key_type, const char *p_message_in, uint32_t p_message_in_length,
const char *p_key, uint32_t p_key_length, const char *p_passphrase,
char *&r_message_out, uint32_t &r_message_out_length, char *&r_result, uint32_t &r_error)
{
bool t_success = true;
EVP_PKEY *t_key = NULL;
RSA *t_rsa = NULL;
int32_t t_rsa_size;
uint8_t *t_output_buffer = NULL;
int32_t t_output_length;
if (!InitSSLCrypt())
{
t_success = false;
MCCStringClone("error: ssl library initialization failed", r_result);
}
if (t_success)
{
if (!load_pem_key(p_key, p_key_length, p_key_type, p_passphrase, t_key))
{
t_success = false;
MCCStringClone("error: invalid key", r_result);
}
}
if (t_success)
{
t_rsa = EVP_PKEY_get1_RSA(t_key);
if (t_rsa == NULL)
{
t_success = false;
MCCStringClone("error: not an RSA key", r_result);
}
}
if (t_success)
{
t_rsa_size = RSA_size(t_rsa);
if (!MCMemoryAllocate(t_rsa_size, t_output_buffer))
{
t_success = false;
r_error = EE_NO_MEMORY;
}
}
int (*t_rsa_func)(int, const unsigned char*, unsigned char*, RSA*, int) = NULL;
if (t_success)
{
if (p_encrypt)
{
if (p_key_type == RSAKEY_PRIVKEY)
t_rsa_func = RSA_private_encrypt;
else
t_rsa_func = RSA_public_encrypt;
if (p_message_in_length >= unsigned(t_rsa_size - 11))
{
t_success = false;
MCCStringClone("error: message too large", r_result);
}
}
else
{
if (p_key_type == RSAKEY_PRIVKEY)
t_rsa_func = RSA_private_decrypt;
else
t_rsa_func = RSA_public_decrypt;
if (p_message_in_length != t_rsa_size)
{
t_success = false;
MCCStringClone("error: invalid message size", r_result);
}
}
}
if (t_success)
{
t_output_length = t_rsa_func(p_message_in_length, (const uint8_t*)p_message_in, t_output_buffer, t_rsa, RSA_PKCS1_PADDING);
if (t_output_length < 0)
{
t_success = false;
MCCStringClone("error: SSL operation failed", r_result);
}
}
if (t_rsa != NULL)
RSA_free(t_rsa);
if (t_key != NULL)
EVP_PKEY_free(t_key);
if (t_success)
{
r_message_out = (char*)t_output_buffer;
r_message_out_length = t_output_length;
}
else
{
uint32_t t_err;
t_err = ERR_get_error();
if (t_err)
{
const char *t_ssl_error = ERR_reason_error_string(t_err);
MCCStringAppendFormat(r_result, " (SSL error: %s)", t_ssl_error);
}
MCMemoryDeallocate(t_output_buffer);
}
return t_success;
}
