e_4758cca.c

mediastreamer2是开源的网络传输媒体流的库

	long returnCode;
	long reasonCode;
	long exitDataLength = 0;
	long ruleArrayLength = 0;
	unsigned char exitData[8];
	unsigned char ruleArray[8];
	unsigned char keyLabel[64];
	unsigned long keyLabelLength = strlen(key_id);
	unsigned char modulus[512];
	long modulusFieldLength = sizeof(modulus);
	long modulusLength = 0;
	unsigned char exponent[512];
	long exponentLength = sizeof(exponent);

	if (keyLabelLength > sizeof(keyLabel))
		{
		CCA4758err(CCA4758_F_IBM_4758_LOAD_PUBKEY,
			CCA4758_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
		return NULL;
		}

	memset(keyLabel,' ', sizeof(keyLabel));
	memcpy(keyLabel, key_id, keyLabelLength);

	keyToken = OPENSSL_malloc(MAX_CCA_PKA_TOKEN_SIZE + sizeof(long));
	if (!keyToken)
		{
		CCA4758err(CCA4758_F_IBM_4758_LOAD_PUBKEY,
				ERR_R_MALLOC_FAILURE);
		goto err;
		}

	keyRecordRead(&returnCode, &reasonCode, &exitDataLength, exitData,
		&ruleArrayLength, ruleArray, keyLabel, &keyTokenLength,
		keyToken+sizeof(long));

	if (returnCode)
		{
		CCA4758err(CCA4758_F_IBM_4758_LOAD_PUBKEY,
				ERR_R_MALLOC_FAILURE);
		goto err;
		}

	if (!getModulusAndExponent(keyToken+sizeof(long), &exponentLength,
			exponent, &modulusLength, &modulusFieldLength, modulus))
		{
		CCA4758err(CCA4758_F_IBM_4758_LOAD_PUBKEY,
			CCA4758_R_FAILED_LOADING_PUBLIC_KEY);
		goto err;
		}

	(*(long*)keyToken) = keyTokenLength;
	rtmp = RSA_new_method(e);
	RSA_set_ex_data(rtmp, hndidx, (char *)keyToken);
	rtmp->e = BN_bin2bn(exponent, exponentLength, NULL);
	rtmp->n = BN_bin2bn(modulus, modulusFieldLength, NULL);
	rtmp->flags |= RSA_FLAG_EXT_PKEY;
	res = EVP_PKEY_new();
	EVP_PKEY_assign_RSA(res, rtmp);

	return res;
err:
	if (keyToken)
		OPENSSL_free(keyToken);
	if (res)
		EVP_PKEY_free(res);
	if (rtmp)
		RSA_free(rtmp);
	return NULL;
	}

static int cca_rsa_pub_enc(int flen, const unsigned char *from,
			unsigned char *to, RSA *rsa,int padding)
	{
	long returnCode;
	long reasonCode;
	long lflen = flen;
	long exitDataLength = 0;
	unsigned char exitData[8];
	long ruleArrayLength = 1;
	unsigned char ruleArray[8] = "PKCS-1.2";
	long dataStructureLength = 0;
	unsigned char dataStructure[8];
	long outputLength = RSA_size(rsa);
	long keyTokenLength;
	unsigned char* keyToken = (unsigned char*)RSA_get_ex_data(rsa, hndidx);

	keyTokenLength = *(long*)keyToken;
	keyToken+=sizeof(long);

	pkaEncrypt(&returnCode, &reasonCode, &exitDataLength, exitData,
		&ruleArrayLength, ruleArray, &lflen, (unsigned char*)from,
		&dataStructureLength, dataStructure, &keyTokenLength,
		keyToken, &outputLength, to);

	if (returnCode || reasonCode)
		return -(returnCode << 16 | reasonCode);
	return outputLength;
	}

static int cca_rsa_priv_dec(int flen, const unsigned char *from,
			unsigned char *to, RSA *rsa,int padding)
	{
	long returnCode;
	long reasonCode;
	long lflen = flen;
	long exitDataLength = 0;
	unsigned char exitData[8];
	long ruleArrayLength = 1;
	unsigned char ruleArray[8] = "PKCS-1.2";
	long dataStructureLength = 0;
	unsigned char dataStructure[8];
	long outputLength = RSA_size(rsa);
	long keyTokenLength;
	unsigned char* keyToken = (unsigned char*)RSA_get_ex_data(rsa, hndidx);

	keyTokenLength = *(long*)keyToken;
	keyToken+=sizeof(long);

	pkaDecrypt(&returnCode, &reasonCode, &exitDataLength, exitData,
		&ruleArrayLength, ruleArray, &lflen, (unsigned char*)from,
		&dataStructureLength, dataStructure, &keyTokenLength,
		keyToken, &outputLength, to);

	return (returnCode | reasonCode) ? 0 : 1;
	}

#define SSL_SIG_LEN 36

static int cca_rsa_verify(int type, const unsigned char *m, unsigned int m_len,
		unsigned char *sigbuf, unsigned int siglen, const RSA *rsa)
	{
	long returnCode;
	long reasonCode;
	long lsiglen = siglen;
	long exitDataLength = 0;
	unsigned char exitData[8];
	long ruleArrayLength = 1;
	unsigned char ruleArray[8] = "PKCS-1.1";
	long keyTokenLength;
	unsigned char* keyToken = (unsigned char*)RSA_get_ex_data(rsa, hndidx);
	long length = SSL_SIG_LEN;
	long keyLength ;
	unsigned char *hashBuffer = NULL;
	X509_SIG sig;
	ASN1_TYPE parameter;
	X509_ALGOR algorithm;
	ASN1_OCTET_STRING digest;

	keyTokenLength = *(long*)keyToken;
	keyToken+=sizeof(long);

	if (type == NID_md5 || type == NID_sha1)
		{
		sig.algor = &algorithm;
		algorithm.algorithm = OBJ_nid2obj(type);

		if (!algorithm.algorithm)
			{
			CCA4758err(CCA4758_F_CCA_RSA_VERIFY,
				CCA4758_R_UNKNOWN_ALGORITHM_TYPE);
			return 0;
			}

		if (!algorithm.algorithm->length)
			{
			CCA4758err(CCA4758_F_CCA_RSA_VERIFY,
				CCA4758_R_ASN1_OID_UNKNOWN_FOR_MD);
			return 0;
			}

		parameter.type = V_ASN1_NULL;
		parameter.value.ptr = NULL;
		algorithm.parameter = &parameter;

		sig.digest = &digest;
		sig.digest->data = (unsigned char*)m;
		sig.digest->length = m_len;

		length = i2d_X509_SIG(&sig, NULL);
		}

	keyLength = RSA_size(rsa);

	if (length - RSA_PKCS1_PADDING > keyLength)
		{
		CCA4758err(CCA4758_F_CCA_RSA_VERIFY,
			CCA4758_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
		return 0;
		}

	switch (type)
		{
		case NID_md5_sha1 :
			if (m_len != SSL_SIG_LEN)
				{
				CCA4758err(CCA4758_F_CCA_RSA_VERIFY,
				CCA4758_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
				return 0;
				}

			hashBuffer = (unsigned char *)m;
			length = m_len;
			break;
		case NID_md5 :
			{
			unsigned char *ptr;
			ptr = hashBuffer = OPENSSL_malloc(
					(unsigned int)keyLength+1);
			if (!hashBuffer)
				{
				CCA4758err(CCA4758_F_CCA_RSA_VERIFY,
						ERR_R_MALLOC_FAILURE);
				return 0;
				}

			i2d_X509_SIG(&sig, &ptr);
			}
			break;
		case NID_sha1 :
			{
			unsigned char *ptr;
			ptr = hashBuffer = OPENSSL_malloc(
					(unsigned int)keyLength+1);
			if (!hashBuffer)
				{
				CCA4758err(CCA4758_F_CCA_RSA_VERIFY,
						ERR_R_MALLOC_FAILURE);
				return 0;
				}
			i2d_X509_SIG(&sig, &ptr);
			}
			break;
		default:
			return 0;
		}

	digitalSignatureVerify(&returnCode, &reasonCode, &exitDataLength,
		exitData, &ruleArrayLength, ruleArray, &keyTokenLength,
		keyToken, &length, hashBuffer, &lsiglen, sigbuf);

	if (type == NID_sha1 || type == NID_md5)
		{
		OPENSSL_cleanse(hashBuffer, keyLength+1);
		OPENSSL_free(hashBuffer);
		}

	return ((returnCode || reasonCode) ? 0 : 1);
	}

#define SSL_SIG_LEN 36

static int cca_rsa_sign(int type, const unsigned char *m, unsigned int m_len,
		unsigned char *sigret, unsigned int *siglen, const RSA *rsa)
	{
	long returnCode;
	long reasonCode;
	long exitDataLength = 0;
	unsigned char exitData[8];
	long ruleArrayLength = 1;
	unsigned char ruleArray[8] = "PKCS-1.1";
	long outputLength=256;
	long outputBitLength;
	long keyTokenLength;
	unsigned char *hashBuffer = NULL;
	unsigned char* keyToken = (unsigned char*)RSA_get_ex_data(rsa, hndidx);
	long length = SSL_SIG_LEN;
	long keyLength ;
	X509_SIG sig;
	ASN1_TYPE parameter;
	X509_ALGOR algorithm;
	ASN1_OCTET_STRING digest;

	keyTokenLength = *(long*)keyToken;
	keyToken+=sizeof(long);

	if (type == NID_md5 || type == NID_sha1)
		{
		sig.algor = &algorithm;
		algorithm.algorithm = OBJ_nid2obj(type);

		if (!algorithm.algorithm)
			{
			CCA4758err(CCA4758_F_CCA_RSA_SIGN,
				CCA4758_R_UNKNOWN_ALGORITHM_TYPE);
			return 0;
			}

		if (!algorithm.algorithm->length)
			{
			CCA4758err(CCA4758_F_CCA_RSA_SIGN,
				CCA4758_R_ASN1_OID_UNKNOWN_FOR_MD);
			return 0;
			}

		parameter.type = V_ASN1_NULL;
		parameter.value.ptr = NULL;
		algorithm.parameter = &parameter;

		sig.digest = &digest;
		sig.digest->data = (unsigned char*)m;
		sig.digest->length = m_len;

		length = i2d_X509_SIG(&sig, NULL);
		}

	keyLength = RSA_size(rsa);

	if (length - RSA_PKCS1_PADDING > keyLength)
		{
		CCA4758err(CCA4758_F_CCA_RSA_SIGN,
			CCA4758_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
		return 0;
		}

	switch (type)
		{
		case NID_md5_sha1 :
			if (m_len != SSL_SIG_LEN)
				{
				CCA4758err(CCA4758_F_CCA_RSA_SIGN,
				CCA4758_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
				return 0;
				}
			hashBuffer = (unsigned char*)m;
			length = m_len;
			break;
		case NID_md5 :
			{
			unsigned char *ptr;
			ptr = hashBuffer = OPENSSL_malloc(
					(unsigned int)keyLength+1);
			if (!hashBuffer)
				{
				CCA4758err(CCA4758_F_CCA_RSA_SIGN,
						ERR_R_MALLOC_FAILURE);
				return 0;
				}
			i2d_X509_SIG(&sig, &ptr);
			}
			break;
		case NID_sha1 :
			{
			unsigned char *ptr;
			ptr = hashBuffer = OPENSSL_malloc(
					(unsigned int)keyLength+1);
			if (!hashBuffer)
				{
				CCA4758err(CCA4758_F_CCA_RSA_SIGN,
						ERR_R_MALLOC_FAILURE);
				return 0;
				}
			i2d_X509_SIG(&sig, &ptr);
			}
			break;
		default:
			return 0;
		}

	digitalSignatureGenerate(&returnCode, &reasonCode, &exitDataLength,
		exitData, &ruleArrayLength, ruleArray, &keyTokenLength,
		keyToken, &length, hashBuffer, &outputLength, &outputBitLength,
		sigret);

	if (type == NID_sha1 || type == NID_md5)
		{
		OPENSSL_cleanse(hashBuffer, keyLength+1);
		OPENSSL_free(hashBuffer);
		}

	*siglen = outputLength;

	return ((returnCode || reasonCode) ? 0 : 1);
	}

static int getModulusAndExponent(const unsigned char*token, long *exponentLength,
		unsigned char *exponent, long *modulusLength, long *modulusFieldLength,
		unsigned char *modulus)
	{
	unsigned long len;

	if (*token++ != (char)0x1E) /* internal PKA token? */
		return 0;

	if (*token++) /* token version must be zero */
		return 0;

	len = *token++;
	len = len << 8;
	len |= (unsigned char)*token++;

	token += 4; /* skip reserved bytes */

	if (*token++ == (char)0x04)
		{
		if (*token++) /* token version must be zero */
			return 0;

		len = *token++;
		len = len << 8;
		len |= (unsigned char)*token++;

		token+=2; /* skip reserved section */

		len = *token++;
		len = len << 8;
		len |= (unsigned char)*token++;

		*exponentLength = len;

		len = *token++;
		len = len << 8;
		len |= (unsigned char)*token++;

		*modulusLength = len;

		len = *token++;
		len = len << 8;
		len |= (unsigned char)*token++;

		*modulusFieldLength = len;

		memcpy(exponent, token, *exponentLength);
		token+= *exponentLength;

		memcpy(modulus, token, *modulusFieldLength);
		return 1;
		}
	return 0;
	}

#endif /* OPENSSL_NO_RSA */

static int cca_random_status(void)
	{
	return 1;
	}

static int cca_get_random_bytes(unsigned char* buf, int num)
	{
	long ret_code;
	long reason_code;
	long exit_data_length;
	unsigned char exit_data[4];
	unsigned char form[] = "RANDOM  ";
	unsigned char rand_buf[8];

	while(num >= (int)sizeof(rand_buf))
		{
		randomNumberGenerate(&ret_code, &reason_code, &exit_data_length,
			exit_data, form, rand_buf);
		if (ret_code)
			return 0;
		num -= sizeof(rand_buf);
		memcpy(buf, rand_buf, sizeof(rand_buf));
		buf += sizeof(rand_buf);
		}

	if (num)
		{
		randomNumberGenerate(&ret_code, &reason_code, NULL, NULL,
			form, rand_buf);
		if (ret_code)
			return 0;
		memcpy(buf, rand_buf, num);
		}

	return 1;
	}

#ifndef OPENSSL_NO_RSA
static void cca_ex_free(void *obj, void *item, CRYPTO_EX_DATA *ad, int idx,
		long argl, void *argp)
	{
	if (item)
		OPENSSL_free(item);
	}
#endif

/* Goo to handle building as a dynamic engine */
#ifndef OPENSSL_NO_DYNAMIC_ENGINE 
static int bind_fn(ENGINE *e, const char *id)
	{
	if(id && (strcmp(id, engine_4758_cca_id) != 0) &&
			(strcmp(id, engine_4758_cca_id_alt) != 0))
		return 0;
	if(!bind_helper(e))
		return 0;
	return 1;
	}       
IMPLEMENT_DYNAMIC_CHECK_FN()
IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
#endif /* OPENSSL_NO_DYNAMIC_ENGINE */

#endif /* !OPENSSL_NO_HW_4758_CCA */
#endif /* !OPENSSL_NO_HW */