int ceph_aes_decrypt(const void *key, int key_len, void *dst, size_t *dst_len, const void *src,  size_t src_len){

    struct scatterlist sg_in[1], sg_out[2];
    struct crypto_blkcipher *tfm = ceph_crypto_alloc_cipher();
    struct blkcipher_desc desc = { .tfm = tfm };
    char pad[16];
    void *iv;
    int ivsize;
    int ret;
    int last_byte;

    if (IS_ERR(tfm))
        return PTR_ERR(tfm);
                                                            
    crypto_blkcipher_setkey((void *)tfm, key, key_len);
    sg_init_table(sg_in, 1);
    sg_init_table(sg_out, 2);
    sg_set_buf(sg_in, src, src_len);
    sg_set_buf(&sg_out[0], dst, *dst_len);
    sg_set_buf(&sg_out[1], pad, sizeof(pad));

    iv = crypto_blkcipher_crt(tfm)->iv;
    ivsize = crypto_blkcipher_ivsize(tfm);
    memcpy(iv, aes_iv, ivsize); 

    ret = crypto_blkcipher_decrypt(&desc, sg_out, sg_in, src_len);
    crypto_free_blkcipher(tfm);
    if (ret < 0) {
        pr_err("ceph_aes_decrypt failed %d\n", ret);
        return ret;
    }
    
    if (src_len <= *dst_len)
        last_byte = ((char*)dst)[src_len - 1];
    else
        last_byte = pad[src_len - *dst_len - 1];

    if (last_byte <= 16 && src_len >= last_byte) {
        *dst_len = src_len - last_byte;
    } 
    else {
        pr_err("ceph_aes_decrypt got bad padding %d on src len %d\n",
        last_byte, (int)src_len);
        return -EPERM;  /* bad padding */
    }
    return 0;
}
Exemplo n.º 2
0
static int ceph_aes_encrypt(const void *key, int key_len,
			    void *dst, size_t *dst_len,
			    const void *src, size_t src_len)
{
	struct scatterlist sg_in[2], sg_out[1];
	struct crypto_blkcipher *tfm = ceph_crypto_alloc_cipher();
	struct blkcipher_desc desc = { .tfm = tfm, .flags = 0 };
	int ret;
	void *iv;
	int ivsize;
	size_t zero_padding = (0x10 - (src_len & 0x0f));
	char pad[16];

	if (IS_ERR(tfm))
		return PTR_ERR(tfm);

	memset(pad, zero_padding, zero_padding);

	*dst_len = src_len + zero_padding;

	crypto_blkcipher_setkey((void *)tfm, key, key_len);
	sg_init_table(sg_in, 2);
	sg_set_buf(&sg_in[0], src, src_len);
	sg_set_buf(&sg_in[1], pad, zero_padding);
	sg_init_table(sg_out, 1);
	sg_set_buf(sg_out, dst, *dst_len);
	iv = crypto_blkcipher_crt(tfm)->iv;
	ivsize = crypto_blkcipher_ivsize(tfm);

	memcpy(iv, aes_iv, ivsize);
	ret = crypto_blkcipher_encrypt(&desc, sg_out, sg_in,
				     src_len + zero_padding);
	crypto_free_blkcipher(tfm);
	if (ret < 0)
		pr_err("ceph_aes_crypt failed %d\n", ret);
	return 0;
}

static int ceph_aes_encrypt2(const void *key, int key_len, void *dst,
			     size_t *dst_len,
			     const void *src1, size_t src1_len,
			     const void *src2, size_t src2_len)
{
	struct scatterlist sg_in[3], sg_out[1];
	struct crypto_blkcipher *tfm = ceph_crypto_alloc_cipher();
	struct blkcipher_desc desc = { .tfm = tfm, .flags = 0 };
	int ret;
	void *iv;
	int ivsize;
	size_t zero_padding = (0x10 - ((src1_len + src2_len) & 0x0f));
	char pad[16];

	if (IS_ERR(tfm))
		return PTR_ERR(tfm);

	memset(pad, zero_padding, zero_padding);

	*dst_len = src1_len + src2_len + zero_padding;

	crypto_blkcipher_setkey((void *)tfm, key, key_len);
	sg_init_table(sg_in, 3);
	sg_set_buf(&sg_in[0], src1, src1_len);
	sg_set_buf(&sg_in[1], src2, src2_len);
	sg_set_buf(&sg_in[2], pad, zero_padding);
	sg_init_table(sg_out, 1);
	sg_set_buf(sg_out, dst, *dst_len);
	iv = crypto_blkcipher_crt(tfm)->iv;
	ivsize = crypto_blkcipher_ivsize(tfm);

	memcpy(iv, aes_iv, ivsize);
	ret = crypto_blkcipher_encrypt(&desc, sg_out, sg_in,
				     src1_len + src2_len + zero_padding);
	crypto_free_blkcipher(tfm);
	if (ret < 0)
		pr_err("ceph_aes_crypt2 failed %d\n", ret);
	return 0;
}

static int ceph_aes_decrypt(const void *key, int key_len,
			    void *dst, size_t *dst_len,
			    const void *src, size_t src_len)
{
	struct scatterlist sg_in[1], sg_out[2];
	struct crypto_blkcipher *tfm = ceph_crypto_alloc_cipher();
	struct blkcipher_desc desc = { .tfm = tfm };
	char pad[16];
	void *iv;
	int ivsize;
	int ret;
	int last_byte;

	if (IS_ERR(tfm))
		return PTR_ERR(tfm);

	crypto_blkcipher_setkey((void *)tfm, key, key_len);
	sg_init_table(sg_in, 1);
	sg_init_table(sg_out, 2);
	sg_set_buf(sg_in, src, src_len);
	sg_set_buf(&sg_out[0], dst, *dst_len);
	sg_set_buf(&sg_out[1], pad, sizeof(pad));

	iv = crypto_blkcipher_crt(tfm)->iv;
	ivsize = crypto_blkcipher_ivsize(tfm);

	memcpy(iv, aes_iv, ivsize);


	ret = crypto_blkcipher_decrypt(&desc, sg_out, sg_in, src_len);
	crypto_free_blkcipher(tfm);
	if (ret < 0) {
		pr_err("ceph_aes_decrypt failed %d\n", ret);
		return ret;
	}

	if (src_len <= *dst_len)
		last_byte = ((char *)dst)[src_len - 1];
	else
		last_byte = pad[src_len - *dst_len - 1];
	if (last_byte <= 16 && src_len >= last_byte) {
		*dst_len = src_len - last_byte;
	} else {
		pr_err("ceph_aes_decrypt got bad padding %d on src len %d\n",
		       last_byte, (int)src_len);
		return -EPERM;  
	}
	return 0;
}

static int ceph_aes_decrypt2(const void *key, int key_len,
			     void *dst1, size_t *dst1_len,
			     void *dst2, size_t *dst2_len,
			     const void *src, size_t src_len)
{
	struct scatterlist sg_in[1], sg_out[3];
	struct crypto_blkcipher *tfm = ceph_crypto_alloc_cipher();
	struct blkcipher_desc desc = { .tfm = tfm };
	char pad[16];
	void *iv;
	int ivsize;
	int ret;
	int last_byte;

	if (IS_ERR(tfm))
		return PTR_ERR(tfm);

	sg_init_table(sg_in, 1);
	sg_set_buf(sg_in, src, src_len);
	sg_init_table(sg_out, 3);
	sg_set_buf(&sg_out[0], dst1, *dst1_len);
	sg_set_buf(&sg_out[1], dst2, *dst2_len);
	sg_set_buf(&sg_out[2], pad, sizeof(pad));

	crypto_blkcipher_setkey((void *)tfm, key, key_len);
	iv = crypto_blkcipher_crt(tfm)->iv;
	ivsize = crypto_blkcipher_ivsize(tfm);

	memcpy(iv, aes_iv, ivsize);


	ret = crypto_blkcipher_decrypt(&desc, sg_out, sg_in, src_len);
	crypto_free_blkcipher(tfm);
	if (ret < 0) {
		pr_err("ceph_aes_decrypt failed %d\n", ret);
		return ret;
	}

	if (src_len <= *dst1_len)
		last_byte = ((char *)dst1)[src_len - 1];
	else if (src_len <= *dst1_len + *dst2_len)
		last_byte = ((char *)dst2)[src_len - *dst1_len - 1];
	else
		last_byte = pad[src_len - *dst1_len - *dst2_len - 1];
	if (last_byte <= 16 && src_len >= last_byte) {
		src_len -= last_byte;
	} else {
		pr_err("ceph_aes_decrypt got bad padding %d on src len %d\n",
		       last_byte, (int)src_len);
		return -EPERM;  
	}

	if (src_len < *dst1_len) {
		*dst1_len = src_len;
		*dst2_len = 0;
	} else {
		*dst2_len = src_len - *dst1_len;
	}

	return 0;
}


int ceph_decrypt(struct ceph_crypto_key *secret, void *dst, size_t *dst_len,
		 const void *src, size_t src_len)
{
	switch (secret->type) {
	case CEPH_CRYPTO_NONE:
		if (*dst_len < src_len)
			return -ERANGE;
		memcpy(dst, src, src_len);
		*dst_len = src_len;
		return 0;

	case CEPH_CRYPTO_AES:
		return ceph_aes_decrypt(secret->key, secret->len, dst,
					dst_len, src, src_len);

	default:
		return -EINVAL;
	}
}

int ceph_decrypt2(struct ceph_crypto_key *secret,
			void *dst1, size_t *dst1_len,
			void *dst2, size_t *dst2_len,
			const void *src, size_t src_len)
{
	size_t t;

	switch (secret->type) {
	case CEPH_CRYPTO_NONE:
		if (*dst1_len + *dst2_len < src_len)
			return -ERANGE;
		t = min(*dst1_len, src_len);
		memcpy(dst1, src, t);
		*dst1_len = t;
		src += t;
		src_len -= t;
		if (src_len) {
			t = min(*dst2_len, src_len);
			memcpy(dst2, src, t);
			*dst2_len = t;
		}
		return 0;

	case CEPH_CRYPTO_AES:
		return ceph_aes_decrypt2(secret->key, secret->len,
					 dst1, dst1_len, dst2, dst2_len,
					 src, src_len);

	default:
		return -EINVAL;
	}
}

int ceph_encrypt(struct ceph_crypto_key *secret, void *dst, size_t *dst_len,
		 const void *src, size_t src_len)
{
	switch (secret->type) {
	case CEPH_CRYPTO_NONE:
		if (*dst_len < src_len)
			return -ERANGE;
		memcpy(dst, src, src_len);
		*dst_len = src_len;
		return 0;

	case CEPH_CRYPTO_AES:
		return ceph_aes_encrypt(secret->key, secret->len, dst,
					dst_len, src, src_len);

	default:
		return -EINVAL;
	}
}

int ceph_encrypt2(struct ceph_crypto_key *secret, void *dst, size_t *dst_len,
		  const void *src1, size_t src1_len,
		  const void *src2, size_t src2_len)
{
	switch (secret->type) {
	case CEPH_CRYPTO_NONE:
		if (*dst_len < src1_len + src2_len)
			return -ERANGE;
		memcpy(dst, src1, src1_len);
		memcpy(dst + src1_len, src2, src2_len);
		*dst_len = src1_len + src2_len;
		return 0;

	case CEPH_CRYPTO_AES:
		return ceph_aes_encrypt2(secret->key, secret->len, dst, dst_len,
					 src1, src1_len, src2, src2_len);

	default:
		return -EINVAL;
	}
}

int ceph_key_instantiate(struct key *key, const void *data, size_t datalen)
{
	struct ceph_crypto_key *ckey;
	int ret;
	void *p;

	ret = -EINVAL;
	if (datalen <= 0 || datalen > 32767 || !data)
		goto err;

	ret = key_payload_reserve(key, datalen);
	if (ret < 0)
		goto err;

	ret = -ENOMEM;
	ckey = kmalloc(sizeof(*ckey), GFP_KERNEL);
	if (!ckey)
		goto err;

	
	p = (void *)data;
	ret = ceph_crypto_key_decode(ckey, &p, (char*)data+datalen);
	if (ret < 0)
		goto err_ckey;

	key->payload.data = ckey;
	return 0;

err_ckey:
	kfree(ckey);
err:
	return ret;
}

int ceph_key_match(const struct key *key, const void *description)
{
	return strcmp(key->description, description) == 0;
}

void ceph_key_destroy(struct key *key) {
	struct ceph_crypto_key *ckey = key->payload.data;

	ceph_crypto_key_destroy(ckey);
	kfree(ckey);
}

struct key_type key_type_ceph = {
	.name		= "ceph",
	.instantiate	= ceph_key_instantiate,
	.match		= ceph_key_match,
	.destroy	= ceph_key_destroy,
};

int ceph_crypto_init(void) {
	return register_key_type(&key_type_ceph);
}

void ceph_crypto_shutdown(void) {
	unregister_key_type(&key_type_ceph);
}
Exemplo n.º 3
0
static int ceph_aes_encrypt(const void *key, int key_len,
			    void *dst, size_t *dst_len,
			    const void *src, size_t src_len)
{
	struct scatterlist sg_in[2], sg_out[1];
	struct crypto_blkcipher *tfm = ceph_crypto_alloc_cipher();
	struct blkcipher_desc desc = { .tfm = tfm, .flags = 0 };
	int ret;
	void *iv;
	int ivsize;
	size_t zero_padding = (0x10 - (src_len & 0x0f));
	char pad[16];

	if (IS_ERR(tfm))
		return PTR_ERR(tfm);

	memset(pad, zero_padding, zero_padding);

	*dst_len = src_len + zero_padding;

	crypto_blkcipher_setkey((void *)tfm, key, key_len);
	sg_init_table(sg_in, 2);
	sg_set_buf(&sg_in[0], src, src_len);
	sg_set_buf(&sg_in[1], pad, zero_padding);
	sg_init_table(sg_out, 1);
	sg_set_buf(sg_out, dst, *dst_len);
	iv = crypto_blkcipher_crt(tfm)->iv;
	ivsize = crypto_blkcipher_ivsize(tfm);

	memcpy(iv, aes_iv, ivsize);
	/*
	print_hex_dump(KERN_ERR, "enc key: ", DUMP_PREFIX_NONE, 16, 1,
		       key, key_len, 1);
	print_hex_dump(KERN_ERR, "enc src: ", DUMP_PREFIX_NONE, 16, 1,
			src, src_len, 1);
	print_hex_dump(KERN_ERR, "enc pad: ", DUMP_PREFIX_NONE, 16, 1,
			pad, zero_padding, 1);
	*/
	ret = crypto_blkcipher_encrypt(&desc, sg_out, sg_in,
				     src_len + zero_padding);
	crypto_free_blkcipher(tfm);
	if (ret < 0)
		pr_err("ceph_aes_crypt failed %d\n", ret);
	/*
	print_hex_dump(KERN_ERR, "enc out: ", DUMP_PREFIX_NONE, 16, 1,
		       dst, *dst_len, 1);
	*/
	return 0;
}

static int ceph_aes_encrypt2(const void *key, int key_len, void *dst,
			     size_t *dst_len,
			     const void *src1, size_t src1_len,
			     const void *src2, size_t src2_len)
{
	struct scatterlist sg_in[3], sg_out[1];
	struct crypto_blkcipher *tfm = ceph_crypto_alloc_cipher();
	struct blkcipher_desc desc = { .tfm = tfm, .flags = 0 };
	int ret;
	void *iv;
	int ivsize;
	size_t zero_padding = (0x10 - ((src1_len + src2_len) & 0x0f));
	char pad[16];

	if (IS_ERR(tfm))
		return PTR_ERR(tfm);

	memset(pad, zero_padding, zero_padding);

	*dst_len = src1_len + src2_len + zero_padding;

	crypto_blkcipher_setkey((void *)tfm, key, key_len);
	sg_init_table(sg_in, 3);
	sg_set_buf(&sg_in[0], src1, src1_len);
	sg_set_buf(&sg_in[1], src2, src2_len);
	sg_set_buf(&sg_in[2], pad, zero_padding);
	sg_init_table(sg_out, 1);
	sg_set_buf(sg_out, dst, *dst_len);
	iv = crypto_blkcipher_crt(tfm)->iv;
	ivsize = crypto_blkcipher_ivsize(tfm);

	memcpy(iv, aes_iv, ivsize);
	/*
	print_hex_dump(KERN_ERR, "enc  key: ", DUMP_PREFIX_NONE, 16, 1,
		       key, key_len, 1);
	print_hex_dump(KERN_ERR, "enc src1: ", DUMP_PREFIX_NONE, 16, 1,
			src1, src1_len, 1);
	print_hex_dump(KERN_ERR, "enc src2: ", DUMP_PREFIX_NONE, 16, 1,
			src2, src2_len, 1);
	print_hex_dump(KERN_ERR, "enc  pad: ", DUMP_PREFIX_NONE, 16, 1,
			pad, zero_padding, 1);
	*/
	ret = crypto_blkcipher_encrypt(&desc, sg_out, sg_in,
				     src1_len + src2_len + zero_padding);
	crypto_free_blkcipher(tfm);
	if (ret < 0)
		pr_err("ceph_aes_crypt2 failed %d\n", ret);
	/*
	print_hex_dump(KERN_ERR, "enc  out: ", DUMP_PREFIX_NONE, 16, 1,
		       dst, *dst_len, 1);
	*/
	return 0;
}

static int ceph_aes_decrypt(const void *key, int key_len,
			    void *dst, size_t *dst_len,
			    const void *src, size_t src_len)
{
	struct scatterlist sg_in[1], sg_out[2];
	struct crypto_blkcipher *tfm = ceph_crypto_alloc_cipher();
	struct blkcipher_desc desc = { .tfm = tfm };
	char pad[16];
	void *iv;
	int ivsize;
	int ret;
	int last_byte;

	if (IS_ERR(tfm))
		return PTR_ERR(tfm);

	crypto_blkcipher_setkey((void *)tfm, key, key_len);
	sg_init_table(sg_in, 1);
	sg_init_table(sg_out, 2);
	sg_set_buf(sg_in, src, src_len);
	sg_set_buf(&sg_out[0], dst, *dst_len);
	sg_set_buf(&sg_out[1], pad, sizeof(pad));

	iv = crypto_blkcipher_crt(tfm)->iv;
	ivsize = crypto_blkcipher_ivsize(tfm);

	memcpy(iv, aes_iv, ivsize);

	/*
	print_hex_dump(KERN_ERR, "dec key: ", DUMP_PREFIX_NONE, 16, 1,
		       key, key_len, 1);
	print_hex_dump(KERN_ERR, "dec  in: ", DUMP_PREFIX_NONE, 16, 1,
		       src, src_len, 1);
	*/

	ret = crypto_blkcipher_decrypt(&desc, sg_out, sg_in, src_len);
	crypto_free_blkcipher(tfm);
	if (ret < 0) {
		pr_err("ceph_aes_decrypt failed %d\n", ret);
		return ret;
	}

	if (src_len <= *dst_len)
		last_byte = ((char *)dst)[src_len - 1];
	else
		last_byte = pad[src_len - *dst_len - 1];
	if (last_byte <= 16 && src_len >= last_byte) {
		*dst_len = src_len - last_byte;
	} else {
		pr_err("ceph_aes_decrypt got bad padding %d on src len %d\n",
		       last_byte, (int)src_len);
		return -EPERM;  /* bad padding */
	}
	/*
	print_hex_dump(KERN_ERR, "dec out: ", DUMP_PREFIX_NONE, 16, 1,
		       dst, *dst_len, 1);
	*/
	return 0;
}

static int ceph_aes_decrypt2(const void *key, int key_len,
			     void *dst1, size_t *dst1_len,
			     void *dst2, size_t *dst2_len,
			     const void *src, size_t src_len)
{
	struct scatterlist sg_in[1], sg_out[3];
	struct crypto_blkcipher *tfm = ceph_crypto_alloc_cipher();
	struct blkcipher_desc desc = { .tfm = tfm };
	char pad[16];
	void *iv;
	int ivsize;
	int ret;
	int last_byte;

	if (IS_ERR(tfm))
		return PTR_ERR(tfm);

	sg_init_table(sg_in, 1);
	sg_set_buf(sg_in, src, src_len);
	sg_init_table(sg_out, 3);
	sg_set_buf(&sg_out[0], dst1, *dst1_len);
	sg_set_buf(&sg_out[1], dst2, *dst2_len);
	sg_set_buf(&sg_out[2], pad, sizeof(pad));

	crypto_blkcipher_setkey((void *)tfm, key, key_len);
	iv = crypto_blkcipher_crt(tfm)->iv;
	ivsize = crypto_blkcipher_ivsize(tfm);

	memcpy(iv, aes_iv, ivsize);

	/*
	print_hex_dump(KERN_ERR, "dec  key: ", DUMP_PREFIX_NONE, 16, 1,
		       key, key_len, 1);
	print_hex_dump(KERN_ERR, "dec   in: ", DUMP_PREFIX_NONE, 16, 1,
		       src, src_len, 1);
	*/

	ret = crypto_blkcipher_decrypt(&desc, sg_out, sg_in, src_len);
	crypto_free_blkcipher(tfm);
	if (ret < 0) {
		pr_err("ceph_aes_decrypt failed %d\n", ret);
		return ret;
	}

	if (src_len <= *dst1_len)
		last_byte = ((char *)dst1)[src_len - 1];
	else if (src_len <= *dst1_len + *dst2_len)
		last_byte = ((char *)dst2)[src_len - *dst1_len - 1];
	else
		last_byte = pad[src_len - *dst1_len - *dst2_len - 1];
	if (last_byte <= 16 && src_len >= last_byte) {
		src_len -= last_byte;
	} else {
		pr_err("ceph_aes_decrypt got bad padding %d on src len %d\n",
		       last_byte, (int)src_len);
		return -EPERM;  /* bad padding */
	}

	if (src_len < *dst1_len) {
		*dst1_len = src_len;
		*dst2_len = 0;
	} else {
		*dst2_len = src_len - *dst1_len;
	}
	/*
	print_hex_dump(KERN_ERR, "dec  out1: ", DUMP_PREFIX_NONE, 16, 1,
		       dst1, *dst1_len, 1);
	print_hex_dump(KERN_ERR, "dec  out2: ", DUMP_PREFIX_NONE, 16, 1,
		       dst2, *dst2_len, 1);
	*/

	return 0;
}


int ceph_decrypt(struct ceph_crypto_key *secret, void *dst, size_t *dst_len,
		 const void *src, size_t src_len)
{
	switch (secret->type) {
	case CEPH_CRYPTO_NONE:
		if (*dst_len < src_len)
			return -ERANGE;
		memcpy(dst, src, src_len);
		*dst_len = src_len;
		return 0;

	case CEPH_CRYPTO_AES:
		return ceph_aes_decrypt(secret->key, secret->len, dst,
					dst_len, src, src_len);

	default:
		return -EINVAL;
	}
}

int ceph_decrypt2(struct ceph_crypto_key *secret,
			void *dst1, size_t *dst1_len,
			void *dst2, size_t *dst2_len,
			const void *src, size_t src_len)
{
	size_t t;

	switch (secret->type) {
	case CEPH_CRYPTO_NONE:
		if (*dst1_len + *dst2_len < src_len)
			return -ERANGE;
		t = min(*dst1_len, src_len);
		memcpy(dst1, src, t);
		*dst1_len = t;
		src += t;
		src_len -= t;
		if (src_len) {
			t = min(*dst2_len, src_len);
			memcpy(dst2, src, t);
			*dst2_len = t;
		}
		return 0;

	case CEPH_CRYPTO_AES:
		return ceph_aes_decrypt2(secret->key, secret->len,
					 dst1, dst1_len, dst2, dst2_len,
					 src, src_len);

	default:
		return -EINVAL;
	}
}

int ceph_encrypt(struct ceph_crypto_key *secret, void *dst, size_t *dst_len,
		 const void *src, size_t src_len)
{
	switch (secret->type) {
	case CEPH_CRYPTO_NONE:
		if (*dst_len < src_len)
			return -ERANGE;
		memcpy(dst, src, src_len);
		*dst_len = src_len;
		return 0;

	case CEPH_CRYPTO_AES:
		return ceph_aes_encrypt(secret->key, secret->len, dst,
					dst_len, src, src_len);

	default:
		return -EINVAL;
	}
}

int ceph_encrypt2(struct ceph_crypto_key *secret, void *dst, size_t *dst_len,
		  const void *src1, size_t src1_len,
		  const void *src2, size_t src2_len)
{
	switch (secret->type) {
	case CEPH_CRYPTO_NONE:
		if (*dst_len < src1_len + src2_len)
			return -ERANGE;
		memcpy(dst, src1, src1_len);
		memcpy(dst + src1_len, src2, src2_len);
		*dst_len = src1_len + src2_len;
		return 0;

	case CEPH_CRYPTO_AES:
		return ceph_aes_encrypt2(secret->key, secret->len, dst, dst_len,
					 src1, src1_len, src2, src2_len);

	default:
		return -EINVAL;
	}
}