[thirdparty/openssl.git] / providers / implementations / ciphers / cipher_rc2.c

/*
 * Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

/* Dispatch functions for RC2 cipher modes ecb, cbc, ofb, cfb */

/*
 * RC2 low level APIs are deprecated for public use, but still ok for internal
 * use.
 */
#include "internal/deprecated.h"

#include "cipher_rc2.h"
#include "prov/implementations.h"
#include "prov/providercommonerr.h"

#define RC2_40_MAGIC    0xa0
#define RC2_64_MAGIC    0x78
#define RC2_128_MAGIC   0x3a

static OSSL_FUNC_cipher_freectx_fn rc2_freectx;
static OSSL_FUNC_cipher_dupctx_fn rc2_dupctx;
static OSSL_FUNC_cipher_gettable_ctx_params_fn rc2_gettable_ctx_params;
static OSSL_FUNC_cipher_settable_ctx_params_fn rc2_settable_ctx_params;

static void rc2_freectx(void *vctx)
{
    PROV_RC2_CTX *ctx = (PROV_RC2_CTX *)vctx;

    OPENSSL_clear_free(ctx,  sizeof(*ctx));
}

static void *rc2_dupctx(void *ctx)
{
    PROV_RC2_CTX *in = (PROV_RC2_CTX *)ctx;
    PROV_RC2_CTX *ret = OPENSSL_malloc(sizeof(*ret));

    if (ret == NULL) {
        ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
        return NULL;
    }
    *ret = *in;

    return ret;
}

static int rc2_keybits_to_magic(int keybits)
{
    switch (keybits) {
    case 128:
        return RC2_128_MAGIC;
    case 64:
        return RC2_64_MAGIC;
    case 40:
        return RC2_40_MAGIC;
    }
    ERR_raise(ERR_LIB_PROV, PROV_R_UNSUPPORTED_KEY_SIZE);
    return 0;
}

static int rc2_magic_to_keybits(int magic)
{
    switch (magic) {
    case RC2_128_MAGIC:
        return 128;
    case RC2_64_MAGIC:
        return 64;
    case RC2_40_MAGIC:
        return 40;
    }
    ERR_raise(ERR_LIB_PROV, PROV_R_UNSUPPORTED_KEY_SIZE);
    return 0;
}

static int rc2_get_ctx_params(void *vctx, OSSL_PARAM params[])
{
    PROV_RC2_CTX *ctx = (PROV_RC2_CTX *)vctx;
    OSSL_PARAM *p;

    if (!cipher_generic_get_ctx_params(vctx, params))
        return 0;
    p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_RC2_KEYBITS);
    if (p != NULL && !OSSL_PARAM_set_size_t(p, ctx->key_bits)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }
    p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_ALG_ID);
    if (p != NULL) {
        long num;
        int i;
        ASN1_TYPE *type;
        unsigned char *d = p->data;
        unsigned char **dd = d == NULL ? NULL : &d;

        if (p->data_type != OSSL_PARAM_OCTET_STRING) {
            ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
            return 0;
        }
        if ((type = ASN1_TYPE_new()) == NULL) {
            ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
            return 0;
        }

        /* Is this the original IV or the running IV? */
        num = rc2_keybits_to_magic(ctx->key_bits);
        if (!ASN1_TYPE_set_int_octetstring(type, num,
                                           ctx->base.iv, ctx->base.ivlen)) {
            ASN1_TYPE_free(type);
            ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
            return 0;
        }
        /*
         * IF the caller has a buffer, we pray to the gods they got the
         * size right.  There's no way to tell the i2d functions...
         */
        i = i2d_ASN1_TYPE(type, dd);
        if (i >= 0)
            p->return_size = (size_t)i;

        ASN1_TYPE_free(type);
        if (i < 0) {
            ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
            return 0;
        }
    }
    return 1;
}

static int rc2_set_ctx_params(void *vctx, OSSL_PARAM params[])
{
    PROV_RC2_CTX *ctx = (PROV_RC2_CTX *)vctx;
    const OSSL_PARAM *p;

    if (!cipher_var_keylen_set_ctx_params(vctx, params))
        return 0;
    p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_RC2_KEYBITS);
    if (p != NULL) {
         if (!OSSL_PARAM_get_size_t(p, &ctx->key_bits)) {
            ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
            return 0;
        }
    }
    p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_ALG_ID);
    if (p != NULL) {
        ASN1_TYPE *type = NULL;
        long num = 0;
        const unsigned char *d = p->data;
        int ret = 1;
        unsigned char iv[16];

        if (p->data_type != OSSL_PARAM_OCTET_STRING
            || ctx->base.ivlen > sizeof(iv)
            || (type = d2i_ASN1_TYPE(NULL, &d, p->data_size)) == NULL
            || ((size_t)ASN1_TYPE_get_int_octetstring(type, &num, iv,
                                                      ctx->base.ivlen)
                != ctx->base.ivlen)
            || !cipher_generic_initiv(&ctx->base, iv, ctx->base.ivlen)
            || (ctx->key_bits = rc2_magic_to_keybits(num)) == 0) {
            ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
            ret = 0;
        }
        ASN1_TYPE_free(type);
        if (ret == 0)
            return 0;
        /*
         * This code assumes that the caller will call
         * EVP_CipherInit_ex() with a non NULL key in order to setup a key that
         * uses the keylen and keybits that were set here.
         */
        ctx->base.keylen = ctx->key_bits / 8;
    }
    return 1;
}

CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_START(rc2)
OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, NULL),
CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_END(rc2)

CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_START(rc2)
OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, NULL),
CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_END(rc2)

#define IMPLEMENT_cipher(alg, UCALG, lcmode, UCMODE, flags, kbits, blkbits,    \
                         ivbits, typ)                                          \
static OSSL_FUNC_cipher_get_params_fn alg##_##kbits##_##lcmode##_get_params;   \
static int alg##_##kbits##_##lcmode##_get_params(OSSL_PARAM params[])          \
{                                                                              \
    return cipher_generic_get_params(params, EVP_CIPH_##UCMODE##_MODE, flags,  \
                                     kbits, blkbits, ivbits);                  \
}                                                                              \
static OSSL_FUNC_cipher_newctx_fn alg##_##kbits##_##lcmode##_newctx;           \
static void * alg##_##kbits##_##lcmode##_newctx(void *provctx)                 \
{                                                                              \
     PROV_##UCALG##_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx));                   \
     if (ctx != NULL) {                                                        \
         cipher_generic_initkey(ctx, kbits, blkbits, ivbits,                   \
                                EVP_CIPH_##UCMODE##_MODE, flags,               \
                                PROV_CIPHER_HW_##alg##_##lcmode(kbits), NULL); \
         ctx->key_bits = kbits;                                                \
     }                                                                         \
     return ctx;                                                               \
}                                                                              \
const OSSL_DISPATCH alg##kbits##lcmode##_functions[] = {                       \
    { OSSL_FUNC_CIPHER_NEWCTX,                                                 \
      (void (*)(void)) alg##_##kbits##_##lcmode##_newctx },                    \
    { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void)) alg##_freectx },              \
    { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void)) alg##_dupctx },                \
    { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))cipher_generic_einit },   \
    { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))cipher_generic_dinit },   \
    { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))cipher_generic_##typ##_update },\
    { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))cipher_generic_##typ##_final },  \
    { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))cipher_generic_cipher },        \
    { OSSL_FUNC_CIPHER_GET_PARAMS,                                             \
      (void (*)(void)) alg##_##kbits##_##lcmode##_get_params },                \
    { OSSL_FUNC_CIPHER_GETTABLE_PARAMS,                                        \
      (void (*)(void))cipher_generic_gettable_params },                        \
    { OSSL_FUNC_CIPHER_GET_CTX_PARAMS,                                         \
      (void (*)(void))rc2_get_ctx_params },                                    \
    { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS,                                    \
      (void (*)(void))rc2_gettable_ctx_params },                               \
    { OSSL_FUNC_CIPHER_SET_CTX_PARAMS,                                         \
      (void (*)(void))rc2_set_ctx_params },                                    \
    { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS,                                    \
     (void (*)(void))rc2_settable_ctx_params },                                \
    { 0, NULL }                                                                \
};

/* rc2128ecb_functions */
IMPLEMENT_cipher(rc2, RC2, ecb, ECB, EVP_CIPH_VARIABLE_LENGTH, 128, 64, 0, block)
/* rc2128cbc_functions */
IMPLEMENT_cipher(rc2, RC2, cbc, CBC, EVP_CIPH_VARIABLE_LENGTH, 128, 64, 64, block)
/* rc240cbc_functions */
IMPLEMENT_cipher(rc2, RC2, cbc, CBC, EVP_CIPH_VARIABLE_LENGTH, 40, 64, 64, block)
/* rc264cbc_functions */
IMPLEMENT_cipher(rc2, RC2, cbc, CBC, EVP_CIPH_VARIABLE_LENGTH, 64, 64, 64, block)

/* rc2128ofb128_functions */
IMPLEMENT_cipher(rc2, RC2, ofb128, OFB, EVP_CIPH_VARIABLE_LENGTH, 128, 8, 64, stream)
/* rc2128cfb128_functions */
IMPLEMENT_cipher(rc2, RC2, cfb128, CFB, EVP_CIPH_VARIABLE_LENGTH, 128, 8, 64, stream)
Commit	Line	Data
f816aa47	1	/*
33388b44	2	* Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved.
f816aa47 SL	3	*
	4	* Licensed under the Apache License 2.0 (the "License"). You may not use
	5	* this file except in compliance with the License. You can obtain a copy
	6	* in the file LICENSE in the source distribution or at
	7	* https://www.openssl.org/source/license.html
	8	*/
	9
	10	/* Dispatch functions for RC2 cipher modes ecb, cbc, ofb, cfb */
	11
ee2993ab P	12	/*
	13	* RC2 low level APIs are deprecated for public use, but still ok for internal
	14	* use.
	15	*/
	16	#include "internal/deprecated.h"
	17
f816aa47	18	#include "cipher_rc2.h"
af3e7e1b	19	#include "prov/implementations.h"
ddd21319	20	#include "prov/providercommonerr.h"
f816aa47 SL	21
	22	#define RC2_40_MAGIC 0xa0
	23	#define RC2_64_MAGIC 0x78
	24	#define RC2_128_MAGIC 0x3a
	25
363b1e5d DMSP	26	static OSSL_FUNC_cipher_freectx_fn rc2_freectx;
	27	static OSSL_FUNC_cipher_dupctx_fn rc2_dupctx;
	28	static OSSL_FUNC_cipher_gettable_ctx_params_fn rc2_gettable_ctx_params;
	29	static OSSL_FUNC_cipher_settable_ctx_params_fn rc2_settable_ctx_params;
f816aa47 SL	30
	31	static void rc2_freectx(void *vctx)
	32	{
	33	PROV_RC2_CTX ctx = (PROV_RC2_CTX )vctx;
	34
	35	OPENSSL_clear_free(ctx, sizeof(*ctx));
	36	}
	37
	38	static void rc2_dupctx(void ctx)
	39	{
	40	PROV_RC2_CTX in = (PROV_RC2_CTX )ctx;
	41	PROV_RC2_CTX ret = OPENSSL_malloc(sizeof(ret));
	42
	43	if (ret == NULL) {
	44	ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
	45	return NULL;
	46	}
	47	ret = in;
	48
	49	return ret;
	50	}
	51
	52	static int rc2_keybits_to_magic(int keybits)
	53	{
	54	switch (keybits) {
	55	case 128:
	56	return RC2_128_MAGIC;
	57	case 64:
	58	return RC2_64_MAGIC;
	59	case 40:
	60	return RC2_40_MAGIC;
	61	}
	62	ERR_raise(ERR_LIB_PROV, PROV_R_UNSUPPORTED_KEY_SIZE);
	63	return 0;
	64	}
	65
	66	static int rc2_magic_to_keybits(int magic)
	67	{
	68	switch (magic) {
	69	case RC2_128_MAGIC:
	70	return 128;
	71	case RC2_64_MAGIC:
	72	return 64;
	73	case RC2_40_MAGIC:
	74	return 40;
	75	}
	76	ERR_raise(ERR_LIB_PROV, PROV_R_UNSUPPORTED_KEY_SIZE);
	77	return 0;
	78	}
	79
	80	static int rc2_get_ctx_params(void *vctx, OSSL_PARAM params[])
	81	{
	82	PROV_RC2_CTX ctx = (PROV_RC2_CTX )vctx;
	83	OSSL_PARAM *p;
	84
	85	if (!cipher_generic_get_ctx_params(vctx, params))
	86	return 0;
	87	p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_RC2_KEYBITS);
	88	if (p != NULL && !OSSL_PARAM_set_size_t(p, ctx->key_bits)) {
	89	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
	90	return 0;
	91	}
	92	p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_ALG_ID);
	93	if (p != NULL) {
94	long num;
95	int i;
96	ASN1_TYPE *type;
97	unsigned char *d = p->data;
98	unsigned char **dd = d == NULL ? NULL : &d;
99
100	if (p->data_type != OSSL_PARAM_OCTET_STRING) {
101	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
102	return 0;
103	}
104	if ((type = ASN1_TYPE_new()) == NULL) {
105	ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
106	return 0;
107	}
108
109	/* Is this the original IV or the running IV? */
110	num = rc2_keybits_to_magic(ctx->key_bits);
111	if (!ASN1_TYPE_set_int_octetstring(type, num,
112	ctx->base.iv, ctx->base.ivlen)) {
113	ASN1_TYPE_free(type);
114	ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
115	return 0;
116	}
117	/*
118	* IF the caller has a buffer, we pray to the gods they got the
119	* size right. There's no way to tell the i2d functions...
120	*/
121	i = i2d_ASN1_TYPE(type, dd);
122	if (i >= 0)
123	p->return_size = (size_t)i;
124
125	ASN1_TYPE_free(type);
126	if (i < 0) {
127	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
128	return 0;
129	}
130	}
131	return 1;
132	}
133
134	static int rc2_set_ctx_params(void *vctx, OSSL_PARAM params[])
135	{
136	PROV_RC2_CTX ctx = (PROV_RC2_CTX )vctx;
137	const OSSL_PARAM *p;
138
d23adad1	139	if (!cipher_var_keylen_set_ctx_params(vctx, params))
f816aa47 SL	140	return 0;
	141	p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_RC2_KEYBITS);
	142	if (p != NULL) {
	143	if (!OSSL_PARAM_get_size_t(p, &ctx->key_bits)) {
	144	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
	145	return 0;
	146	}
	147	}
	148	p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_ALG_ID);
	149	if (p != NULL) {
	150	ASN1_TYPE *type = NULL;
	151	long num = 0;
	152	const unsigned char *d = p->data;
	153	int ret = 1;
	154	unsigned char iv[16];
	155
	156	if (p->data_type != OSSL_PARAM_OCTET_STRING
	157	\|\| ctx->base.ivlen > sizeof(iv)
	158	\|\| (type = d2i_ASN1_TYPE(NULL, &d, p->data_size)) == NULL
	159	\|\| ((size_t)ASN1_TYPE_get_int_octetstring(type, &num, iv,
	160	ctx->base.ivlen)
	161	!= ctx->base.ivlen)
	162	\|\| !cipher_generic_initiv(&ctx->base, iv, ctx->base.ivlen)
	163	\|\| (ctx->key_bits = rc2_magic_to_keybits(num)) == 0) {
	164	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
	165	ret = 0;
	166	}
	167	ASN1_TYPE_free(type);
	168	if (ret == 0)
	169	return 0;
	170	/*
	171	* This code assumes that the caller will call
	172	* EVP_CipherInit_ex() with a non NULL key in order to setup a key that
	173	* uses the keylen and keybits that were set here.
	174	*/
	175	ctx->base.keylen = ctx->key_bits / 8;
	176	}
	177	return 1;
	178	}
	179
	180	CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_START(rc2)
	181	OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, NULL),
	182	CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_END(rc2)
	183
	184	CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_START(rc2)
d23adad1	185	OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
f816aa47 SL	186	OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, NULL),
	187	CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_END(rc2)
	188
	189	#define IMPLEMENT_cipher(alg, UCALG, lcmode, UCMODE, flags, kbits, blkbits, \
	190	ivbits, typ) \
363b1e5d	191	static OSSL_FUNC_cipher_get_params_fn alg##_##kbits##_##lcmode##_get_params; \
f816aa47 SL	192	static int alg##_##kbits##_##lcmode##_get_params(OSSL_PARAM params[]) \
	193	{ \
	194	return cipher_generic_get_params(params, EVP_CIPH_##UCMODE##_MODE, flags, \
	195	kbits, blkbits, ivbits); \
	196	} \
363b1e5d	197	static OSSL_FUNC_cipher_newctx_fn alg##_##kbits##_##lcmode##_newctx; \
f816aa47 SL	198	static void * alg##_##kbits##_##lcmode##_newctx(void *provctx) \
	199	{ \
	200	PROV_##UCALG##_CTX ctx = OPENSSL_zalloc(sizeof(ctx)); \
	201	if (ctx != NULL) { \
	202	cipher_generic_initkey(ctx, kbits, blkbits, ivbits, \
	203	EVP_CIPH_##UCMODE##_MODE, flags, \
	204	PROV_CIPHER_HW_##alg##_##lcmode(kbits), NULL); \
	205	ctx->key_bits = kbits; \
	206	} \
	207	return ctx; \
	208	} \
	209	const OSSL_DISPATCH alg##kbits##lcmode##_functions[] = { \
	210	{ OSSL_FUNC_CIPHER_NEWCTX, \
	211	(void (*)(void)) alg##_##kbits##_##lcmode##_newctx }, \
	212	{ OSSL_FUNC_CIPHER_FREECTX, (void (*)(void)) alg##_freectx }, \
	213	{ OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void)) alg##_dupctx }, \
	214	{ OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))cipher_generic_einit }, \
	215	{ OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))cipher_generic_dinit }, \
	216	{ OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))cipher_generic_##typ##_update },\
	217	{ OSSL_FUNC_CIPHER_FINAL, (void (*)(void))cipher_generic_##typ##_final }, \
	218	{ OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))cipher_generic_cipher }, \
	219	{ OSSL_FUNC_CIPHER_GET_PARAMS, \
	220	(void (*)(void)) alg##_##kbits##_##lcmode##_get_params }, \
	221	{ OSSL_FUNC_CIPHER_GETTABLE_PARAMS, \
	222	(void (*)(void))cipher_generic_gettable_params }, \
	223	{ OSSL_FUNC_CIPHER_GET_CTX_PARAMS, \
	224	(void (*)(void))rc2_get_ctx_params }, \
	225	{ OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS, \
	226	(void (*)(void))rc2_gettable_ctx_params }, \
	227	{ OSSL_FUNC_CIPHER_SET_CTX_PARAMS, \
	228	(void (*)(void))rc2_set_ctx_params }, \
	229	{ OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS, \
	230	(void (*)(void))rc2_settable_ctx_params }, \
	231	{ 0, NULL } \
	232	};
	233
	234	/* rc2128ecb_functions */
	235	IMPLEMENT_cipher(rc2, RC2, ecb, ECB, EVP_CIPH_VARIABLE_LENGTH, 128, 64, 0, block)
	236	/* rc2128cbc_functions */
	237	IMPLEMENT_cipher(rc2, RC2, cbc, CBC, EVP_CIPH_VARIABLE_LENGTH, 128, 64, 64, block)
	238	/* rc240cbc_functions */
	239	IMPLEMENT_cipher(rc2, RC2, cbc, CBC, EVP_CIPH_VARIABLE_LENGTH, 40, 64, 64, block)
	240	/* rc264cbc_functions */
	241	IMPLEMENT_cipher(rc2, RC2, cbc, CBC, EVP_CIPH_VARIABLE_LENGTH, 64, 64, 64, block)
	242
	243	/* rc2128ofb128_functions */
	244	IMPLEMENT_cipher(rc2, RC2, ofb128, OFB, EVP_CIPH_VARIABLE_LENGTH, 128, 8, 64, stream)
	245	/* rc2128cfb128_functions */
	246	IMPLEMENT_cipher(rc2, RC2, cfb128, CFB, EVP_CIPH_VARIABLE_LENGTH, 128, 8, 64, stream)