/*

 * Copyright 2017-2019 The OpenSSL Project Authors. All Rights Reserved.

 * Copyright (c) 2017, Oracle and/or its affiliates.  All rights reserved.

 *

 * Licensed under the OpenSSL license (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

 */

#include "internal/cryptlib.h"

#ifndef OPENSSL_NO_ARIA

# include <openssl/evp.h>

# include <openssl/modes.h>

# include <openssl/rand.h>

# include <openssl/rand_drbg.h>

# include "crypto/aria.h"

# include "crypto/evp.h"

# include "modes_local.h"

# include "evp_local.h"

/* ARIA subkey Structure */

typedef struct {

    ARIA_KEY ks;

} EVP_ARIA_KEY;

/* ARIA GCM context */

typedef struct {

    union {

        double align;

        ARIA_KEY ks;

    } ks;                       /* ARIA subkey to use */

    int key_set;                /* Set if key initialised */

    int iv_set;                 /* Set if an iv is set */

    GCM128_CONTEXT gcm;

    unsigned char *iv;          /* Temporary IV store */

    int ivlen;                  /* IV length */

    int taglen;

    int iv_gen;                 /* It is OK to generate IVs */

    int tls_aad_len;            /* TLS AAD length */

} EVP_ARIA_GCM_CTX;

/* ARIA CCM context */

typedef struct {

    union {

        double align;

        ARIA_KEY ks;

    } ks;                       /* ARIA key schedule to use */

    int key_set;                /* Set if key initialised */

    int iv_set;                 /* Set if an iv is set */

    int tag_set;                /* Set if tag is valid */

    int len_set;                /* Set if message length set */

    int L, M;                   /* L and M parameters from RFC3610 */

    int tls_aad_len;            /* TLS AAD length */

    CCM128_CONTEXT ccm;

    ccm128_f str;

} EVP_ARIA_CCM_CTX;

/* The subkey for ARIA is generated. */

static int aria_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,

                            const unsigned char *iv, int enc)

{

    int ret;

    int mode = EVP_CIPHER_CTX_mode(ctx);

    if (enc || (mode != EVP_CIPH_ECB_MODE && mode != EVP_CIPH_CBC_MODE))

        ret = aria_set_encrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8,

                                        EVP_CIPHER_CTX_get_cipher_data(ctx));

    else

        ret = aria_set_decrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8,

                                        EVP_CIPHER_CTX_get_cipher_data(ctx));

    if (ret < 0) {

        EVPerr(EVP_F_ARIA_INIT_KEY,EVP_R_ARIA_KEY_SETUP_FAILED);

        return 0;

    }

    return 1;

}

static void aria_cbc_encrypt(const unsigned char *in, unsigned char *out,

                             size_t len, const ARIA_KEY *key,

                             unsigned char *ivec, const int enc)

{

    if (enc)

        CRYPTO_cbc128_encrypt(in, out, len, key, ivec,

                              (block128_f) aria_encrypt);

    else

        CRYPTO_cbc128_decrypt(in, out, len, key, ivec,

                              (block128_f) aria_encrypt);

}

static void aria_cfb128_encrypt(const unsigned char *in, unsigned char *out,

                                size_t length, const ARIA_KEY *key,

                                unsigned char *ivec, int *num, const int enc)

{

    CRYPTO_cfb128_encrypt(in, out, length, key, ivec, num, enc,

                          (block128_f) aria_encrypt);

}

static void aria_cfb1_encrypt(const unsigned char *in, unsigned char *out,

                              size_t length, const ARIA_KEY *key,

                              unsigned char *ivec, int *num, const int enc)

{

    CRYPTO_cfb128_1_encrypt(in, out, length, key, ivec, num, enc,

                            (block128_f) aria_encrypt);

}

static void aria_cfb8_encrypt(const unsigned char *in, unsigned char *out,

                              size_t length, const ARIA_KEY *key,

                              unsigned char *ivec, int *num, const int enc)

{

    CRYPTO_cfb128_8_encrypt(in, out, length, key, ivec, num, enc,

                            (block128_f) aria_encrypt);

}

static void aria_ecb_encrypt(const unsigned char *in, unsigned char *out,

                             const ARIA_KEY *key, const int enc)

{

    aria_encrypt(in, out, key);

}

static void aria_ofb128_encrypt(const unsigned char *in, unsigned char *out,

                             size_t length, const ARIA_KEY *key,

                             unsigned char *ivec, int *num)

{

    CRYPTO_ofb128_encrypt(in, out, length, key, ivec, num,

                         (block128_f) aria_encrypt);

}

IMPLEMENT_BLOCK_CIPHER(aria_128, ks, aria, EVP_ARIA_KEY,

                        NID_aria_128, 16, 16, 16, 128,

                        0, aria_init_key, NULL,

                        EVP_CIPHER_set_asn1_iv,

                        EVP_CIPHER_get_asn1_iv,

                        NULL)

IMPLEMENT_BLOCK_CIPHER(aria_192, ks, aria, EVP_ARIA_KEY,

                        NID_aria_192, 16, 24, 16, 128,

                        0, aria_init_key, NULL,

                        EVP_CIPHER_set_asn1_iv,

                        EVP_CIPHER_get_asn1_iv,

                        NULL)

IMPLEMENT_BLOCK_CIPHER(aria_256, ks, aria, EVP_ARIA_KEY,

                        NID_aria_256, 16, 32, 16, 128,

                        0, aria_init_key, NULL,

                        EVP_CIPHER_set_asn1_iv,

                        EVP_CIPHER_get_asn1_iv,

                        NULL)

# define IMPLEMENT_ARIA_CFBR(ksize,cbits) \

                IMPLEMENT_CFBR(aria,aria,EVP_ARIA_KEY,ks,ksize,cbits,16,0)

IMPLEMENT_ARIA_CFBR(128,1)

IMPLEMENT_ARIA_CFBR(192,1)

IMPLEMENT_ARIA_CFBR(256,1)

IMPLEMENT_ARIA_CFBR(128,8)

IMPLEMENT_ARIA_CFBR(192,8)

IMPLEMENT_ARIA_CFBR(256,8)

# define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \

static const EVP_CIPHER aria_##keylen##_##mode = { \

        nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \

        flags|EVP_CIPH_##MODE##_MODE,   \

        aria_init_key,                  \

        aria_##mode##_cipher,           \

        NULL,                           \

        sizeof(EVP_ARIA_KEY),           \

        NULL,NULL,NULL,NULL };          \

const EVP_CIPHER *EVP_aria_##keylen##_##mode(void) \

{ return &aria_##keylen##_##mode; }

static int aria_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,

                               const unsigned char *in, size_t len)

{

    unsigned int num = EVP_CIPHER_CTX_num(ctx);

    EVP_ARIA_KEY *dat = EVP_C_DATA(EVP_ARIA_KEY,ctx);

    CRYPTO_ctr128_encrypt(in, out, len, &dat->ks,

                          EVP_CIPHER_CTX_iv_noconst(ctx),

                          EVP_CIPHER_CTX_buf_noconst(ctx), &num,

                          (block128_f) aria_encrypt);

    EVP_CIPHER_CTX_set_num(ctx, num);

    return 1;

}

BLOCK_CIPHER_generic(NID_aria, 128, 1, 16, ctr, ctr, CTR, 0)

BLOCK_CIPHER_generic(NID_aria, 192, 1, 16, ctr, ctr, CTR, 0)

BLOCK_CIPHER_generic(NID_aria, 256, 1, 16, ctr, ctr, CTR, 0)

/* Authenticated cipher modes (GCM/CCM) */

/* increment counter (64-bit int) by 1 */

static void ctr64_inc(unsigned char *counter)

{

    int n = 8;

    unsigned char c;

    do {

        --n;

        c = counter[n];

        ++c;

        counter[n] = c;

        if (c)

            return;

    } while (n);

}

static int aria_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,

                                 const unsigned char *iv, int enc)

{

    int ret;

    EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX,ctx);

    if (!iv && !key)

        return 1;

    if (key) {

        ret = aria_set_encrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8,

                                   &gctx->ks.ks);

        CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks,

                           (block128_f) aria_encrypt);

        if (ret < 0) {

            EVPerr(EVP_F_ARIA_GCM_INIT_KEY,EVP_R_ARIA_KEY_SETUP_FAILED);

            return 0;

        }

        /*

         * If we have an iv can set it directly, otherwise use saved IV.

         */

        if (iv == NULL && gctx->iv_set)

            iv = gctx->iv;

        if (iv) {

            CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);

            gctx->iv_set = 1;

        }

        gctx->key_set = 1;

    } else {

        /* If key set use IV, otherwise copy */

        if (gctx->key_set)

            CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);

        else

            memcpy(gctx->iv, iv, gctx->ivlen);

        gctx->iv_set = 1;

        gctx->iv_gen = 0;

    }

    return 1;

}

static int aria_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)

{

    EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX,c);

    switch (type) {

    case EVP_CTRL_INIT:

        gctx->key_set = 0;

        gctx->iv_set = 0;

        gctx->ivlen = EVP_CIPHER_iv_length(c->cipher);

        gctx->iv = EVP_CIPHER_CTX_iv_noconst(c);

        gctx->taglen = -1;

        gctx->iv_gen = 0;

        gctx->tls_aad_len = -1;

        return 1;

    case EVP_CTRL_AEAD_SET_IVLEN:

        if (arg <= 0)

            return 0;

        /* Allocate memory for IV if needed */

        if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen)) {

            if (gctx->iv != EVP_CIPHER_CTX_iv_noconst(c))

                OPENSSL_free(gctx->iv);

            if ((gctx->iv = OPENSSL_malloc(arg)) == NULL) {

                EVPerr(EVP_F_ARIA_GCM_CTRL, ERR_R_MALLOC_FAILURE);

                return 0;

            }

        }

        gctx->ivlen = arg;

        return 1;

    case EVP_CTRL_GET_IVLEN:

        *(int *)ptr = gctx->ivlen;

        return 1;

    case EVP_CTRL_AEAD_SET_TAG:

        if (arg <= 0 || arg > 16 || EVP_CIPHER_CTX_encrypting(c))

            return 0;

        memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);

        gctx->taglen = arg;

        return 1;

    case EVP_CTRL_AEAD_GET_TAG:

        if (arg <= 0 || arg > 16 || !EVP_CIPHER_CTX_encrypting(c)

            || gctx->taglen < 0)

            return 0;

        memcpy(ptr, EVP_CIPHER_CTX_buf_noconst(c), arg);

        return 1;

    case EVP_CTRL_GCM_SET_IV_FIXED:

        /* Special case: -1 length restores whole IV */

        if (arg == -1) {

            memcpy(gctx->iv, ptr, gctx->ivlen);

            gctx->iv_gen = 1;

            return 1;

        }

        /*

         * Fixed field must be at least 4 bytes and invocation field at least

         * 8.

         */

        if ((arg < 4) || (gctx->ivlen - arg) < 8)

            return 0;

        if (arg)

            memcpy(gctx->iv, ptr, arg);

        if (EVP_CIPHER_CTX_encrypting(c)

            && RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0)

            return 0;

        gctx->iv_gen = 1;

        return 1;

    case EVP_CTRL_GCM_IV_GEN:

        if (gctx->iv_gen == 0 || gctx->key_set == 0)

            return 0;

        CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);

        if (arg <= 0 || arg > gctx->ivlen)

            arg = gctx->ivlen;

        memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg);

        /*

         * Invocation field will be at least 8 bytes in size and so no need

         * to check wrap around or increment more than last 8 bytes.

         */

        ctr64_inc(gctx->iv + gctx->ivlen - 8);

        gctx->iv_set = 1;

        return 1;

    case EVP_CTRL_GCM_SET_IV_INV:

        if (gctx->iv_gen == 0 || gctx->key_set == 0

            || EVP_CIPHER_CTX_encrypting(c))

            return 0;

        memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg);

        CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);

        gctx->iv_set = 1;

        return 1;

    case EVP_CTRL_AEAD_TLS1_AAD:

        /* Save the AAD for later use */

        if (arg != EVP_AEAD_TLS1_AAD_LEN)

            return 0;

        memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);

        gctx->tls_aad_len = arg;

        {

            unsigned int len =

                EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] << 8

                | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1];

            /* Correct length for explicit IV */

            if (len < EVP_GCM_TLS_EXPLICIT_IV_LEN)

                return 0;

            len -= EVP_GCM_TLS_EXPLICIT_IV_LEN;

            /* If decrypting correct for tag too */

            if (!EVP_CIPHER_CTX_encrypting(c)) {

                if (len < EVP_GCM_TLS_TAG_LEN)

                    return 0;

                len -= EVP_GCM_TLS_TAG_LEN;

            }

            EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] = len >> 8;

            EVP_CIPHER_CTX_buf_noconst(c)[arg - 1] = len & 0xff;

        }

        /* Extra padding: tag appended to record */

        return EVP_GCM_TLS_TAG_LEN;

    case EVP_CTRL_COPY:

        {

            EVP_CIPHER_CTX *out = ptr;

            EVP_ARIA_GCM_CTX *gctx_out = EVP_C_DATA(EVP_ARIA_GCM_CTX,out);

            if (gctx->gcm.key) {

                if (gctx->gcm.key != &gctx->ks)

                    return 0;

                gctx_out->gcm.key = &gctx_out->ks;

            }

            if (gctx->iv == EVP_CIPHER_CTX_iv_noconst(c))

                gctx_out->iv = EVP_CIPHER_CTX_iv_noconst(out);

            else {

                if ((gctx_out->iv = OPENSSL_malloc(gctx->ivlen)) == NULL) {

                    EVPerr(EVP_F_ARIA_GCM_CTRL, ERR_R_MALLOC_FAILURE);

                    return 0;

                }

                memcpy(gctx_out->iv, gctx->iv, gctx->ivlen);

            }

            return 1;

        }

    default:

        return -1;

    }

}

static int aria_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,

                              const unsigned char *in, size_t len)

{

    EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX,ctx);

    int rv = -1;

    /* Encrypt/decrypt must be performed in place */

    if (out != in

        || len < (EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN))

        return -1;

    /*

     * Set IV from start of buffer or generate IV and write to start of

     * buffer.

     */

    if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CIPHER_CTX_encrypting(ctx) ?

                            EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV,

                            EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0)

        goto err;

    /* Use saved AAD */

    if (CRYPTO_gcm128_aad(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx),

                          gctx->tls_aad_len))

        goto err;

    /* Fix buffer and length to point to payload */

    in += EVP_GCM_TLS_EXPLICIT_IV_LEN;

    out += EVP_GCM_TLS_EXPLICIT_IV_LEN;

    len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;

    if (EVP_CIPHER_CTX_encrypting(ctx)) {

        /* Encrypt payload */

        if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))

            goto err;

        out += len;

        /* Finally write tag */

        CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN);

        rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;

    } else {

        /* Decrypt */

        if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))

            goto err;

        /* Retrieve tag */

        CRYPTO_gcm128_tag(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx),

                          EVP_GCM_TLS_TAG_LEN);

        /* If tag mismatch wipe buffer */

        if (CRYPTO_memcmp(EVP_CIPHER_CTX_buf_noconst(ctx), in + len,

                          EVP_GCM_TLS_TAG_LEN)) {

            OPENSSL_cleanse(out, len);

            goto err;

        }

        rv = len;

    }

 err:

    gctx->iv_set = 0;

    gctx->tls_aad_len = -1;

    return rv;

}

static int aria_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,

                          const unsigned char *in, size_t len)

{

    EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX,ctx);

    /* If not set up, return error */

    if (!gctx->key_set)

        return -1;

    if (gctx->tls_aad_len >= 0)

        return aria_gcm_tls_cipher(ctx, out, in, len);

    if (!gctx->iv_set)

        return -1;

    if (in) {

        if (out == NULL) {

            if (CRYPTO_gcm128_aad(&gctx->gcm, in, len))

                return -1;

        } else if (EVP_CIPHER_CTX_encrypting(ctx)) {

            if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))

                return -1;

        } else {

            if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))

                return -1;

        }

        return len;

    }

    if (!EVP_CIPHER_CTX_encrypting(ctx)) {

        if (gctx->taglen < 0)

            return -1;

        if (CRYPTO_gcm128_finish(&gctx->gcm,

                                 EVP_CIPHER_CTX_buf_noconst(ctx),

                                 gctx->taglen) != 0)

            return -1;

        gctx->iv_set = 0;

        return 0;

    }

    CRYPTO_gcm128_tag(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx), 16);

    gctx->taglen = 16;

    /* Don't reuse the IV */

    gctx->iv_set = 0;

    return 0;

}

static int aria_gcm_cleanup(EVP_CIPHER_CTX *ctx)

{

    EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX, ctx);

    if (gctx->iv != EVP_CIPHER_CTX_iv_noconst(ctx))

        OPENSSL_free(gctx->iv);

    return 1;

}

static int aria_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,

                            const unsigned char *iv, int enc)

{

    int ret;

    EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX,ctx);

    if (!iv && !key)

        return 1;

    if (key) {

        ret = aria_set_encrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8,

                                   &cctx->ks.ks);

        CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,

                           &cctx->ks, (block128_f) aria_encrypt);

        if (ret < 0) {

            EVPerr(EVP_F_ARIA_CCM_INIT_KEY,EVP_R_ARIA_KEY_SETUP_FAILED);

            return 0;

        }

        cctx->str = NULL;

        cctx->key_set = 1;

    }

    if (iv) {

        memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), iv, 15 - cctx->L);

        cctx->iv_set = 1;

    }

    return 1;

}

static int aria_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)

{

    EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX,c);

    switch (type) {

    case EVP_CTRL_INIT:

        cctx->key_set = 0;

        cctx->iv_set = 0;

        cctx->L = 8;

        cctx->M = 12;

        cctx->tag_set = 0;

        cctx->len_set = 0;

        cctx->tls_aad_len = -1;

        return 1;

    case EVP_CTRL_AEAD_TLS1_AAD:

        /* Save the AAD for later use */

        if (arg != EVP_AEAD_TLS1_AAD_LEN)

            return 0;

        memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);

        cctx->tls_aad_len = arg;

        {

            uint16_t len =

                EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] << 8

                | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1];

            /* Correct length for explicit IV */

            if (len < EVP_CCM_TLS_EXPLICIT_IV_LEN)

                return 0;

            len -= EVP_CCM_TLS_EXPLICIT_IV_LEN;

            /* If decrypting correct for tag too */

            if (!EVP_CIPHER_CTX_encrypting(c)) {

                if (len < cctx->M)

                    return 0;

                len -= cctx->M;

            }

            EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] = len >> 8;

            EVP_CIPHER_CTX_buf_noconst(c)[arg - 1] = len & 0xff;

        }

        /* Extra padding: tag appended to record */

        return cctx->M;

    case EVP_CTRL_CCM_SET_IV_FIXED:

        /* Sanity check length */

        if (arg != EVP_CCM_TLS_FIXED_IV_LEN)

            return 0;

        /* Just copy to first part of IV */

        memcpy(EVP_CIPHER_CTX_iv_noconst(c), ptr, arg);

        return 1;

    case EVP_CTRL_GET_IVLEN:

        *(int *)ptr = 15 - cctx->L;

        return 1;

    case EVP_CTRL_AEAD_SET_IVLEN:

        arg = 15 - arg;

        /* fall thru */

    case EVP_CTRL_CCM_SET_L:

        if (arg < 2 || arg > 8)

            return 0;

        cctx->L = arg;

        return 1;

    case EVP_CTRL_AEAD_SET_TAG:

        if ((arg & 1) || arg < 4 || arg > 16)

            return 0;

        if (EVP_CIPHER_CTX_encrypting(c) && ptr)

            return 0;

        if (ptr) {

            cctx->tag_set = 1;

            memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);

        }

        cctx->M = arg;

        return 1;

    case EVP_CTRL_AEAD_GET_TAG:

        if (!EVP_CIPHER_CTX_encrypting(c) || !cctx->tag_set)

            return 0;

        if (!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg))

            return 0;

        cctx->tag_set = 0;

        cctx->iv_set = 0;

        cctx->len_set = 0;

        return 1;

    case EVP_CTRL_COPY:

        {

            EVP_CIPHER_CTX *out = ptr;

            EVP_ARIA_CCM_CTX *cctx_out = EVP_C_DATA(EVP_ARIA_CCM_CTX,out);

            if (cctx->ccm.key) {

                if (cctx->ccm.key != &cctx->ks)

                    return 0;

                cctx_out->ccm.key = &cctx_out->ks;

            }

            return 1;

        }

    default:

        return -1;

    }

}

static int aria_ccm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,

                              const unsigned char *in, size_t len)

{

    EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX,ctx);

    CCM128_CONTEXT *ccm = &cctx->ccm;

    /* Encrypt/decrypt must be performed in place */

    if (out != in || len < (EVP_CCM_TLS_EXPLICIT_IV_LEN + (size_t)cctx->M))

        return -1;

    /* If encrypting set explicit IV from sequence number (start of AAD) */

    if (EVP_CIPHER_CTX_encrypting(ctx))

        memcpy(out, EVP_CIPHER_CTX_buf_noconst(ctx),

               EVP_CCM_TLS_EXPLICIT_IV_LEN);

    /* Get rest of IV from explicit IV */

    memcpy(EVP_CIPHER_CTX_iv_noconst(ctx) + EVP_CCM_TLS_FIXED_IV_LEN, in,

           EVP_CCM_TLS_EXPLICIT_IV_LEN);

    /* Correct length value */

    len -= EVP_CCM_TLS_EXPLICIT_IV_LEN + cctx->M;

    if (CRYPTO_ccm128_setiv(ccm, EVP_CIPHER_CTX_iv_noconst(ctx), 15 - cctx->L,

                            len))

            return -1;

    /* Use saved AAD */

    CRYPTO_ccm128_aad(ccm, EVP_CIPHER_CTX_buf_noconst(ctx), cctx->tls_aad_len);

    /* Fix buffer to point to payload */

    in += EVP_CCM_TLS_EXPLICIT_IV_LEN;

    out += EVP_CCM_TLS_EXPLICIT_IV_LEN;

    if (EVP_CIPHER_CTX_encrypting(ctx)) {

        if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len, cctx->str)

                      : CRYPTO_ccm128_encrypt(ccm, in, out, len))

            return -1;

        if (!CRYPTO_ccm128_tag(ccm, out + len, cctx->M))

            return -1;

        return len + EVP_CCM_TLS_EXPLICIT_IV_LEN + cctx->M;

    } else {

        if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len, cctx->str)

                      : !CRYPTO_ccm128_decrypt(ccm, in, out, len)) {

            unsigned char tag[16];

            if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) {

                if (!CRYPTO_memcmp(tag, in + len, cctx->M))

                    return len;

            }

        }

        OPENSSL_cleanse(out, len);

        return -1;

    }

}

static int aria_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,

                          const unsigned char *in, size_t len)

{

    EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX,ctx);

    CCM128_CONTEXT *ccm = &cctx->ccm;

    /* If not set up, return error */

    if (!cctx->key_set)

        return -1;

    if (cctx->tls_aad_len >= 0)

        return aria_ccm_tls_cipher(ctx, out, in, len);

    /* EVP_*Final() doesn't return any data */

    if (in == NULL && out != NULL)

        return 0;

    if (!cctx->iv_set)

        return -1;

    if (!out) {

        if (!in) {

            if (CRYPTO_ccm128_setiv(ccm, EVP_CIPHER_CTX_iv_noconst(ctx),

                                    15 - cctx->L, len))

                return -1;

            cctx->len_set = 1;

            return len;

        }

        /* If have AAD need message length */

        if (!cctx->len_set && len)

            return -1;

        CRYPTO_ccm128_aad(ccm, in, len);

        return len;

    }

    /* The tag must be set before actually decrypting data */

    if (!EVP_CIPHER_CTX_encrypting(ctx) && !cctx->tag_set)

        return -1;

    /* If not set length yet do it */

    if (!cctx->len_set) {

        if (CRYPTO_ccm128_setiv(ccm, EVP_CIPHER_CTX_iv_noconst(ctx),

                                15 - cctx->L, len))

            return -1;

        cctx->len_set = 1;

    }

    if (EVP_CIPHER_CTX_encrypting(ctx)) {

        if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len, cctx->str)

                      : CRYPTO_ccm128_encrypt(ccm, in, out, len))

            return -1;

        cctx->tag_set = 1;

        return len;

    } else {

        int rv = -1;

        if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len,

                                                     cctx->str) :

            !CRYPTO_ccm128_decrypt(ccm, in, out, len)) {

            unsigned char tag[16];

            if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) {

                if (!CRYPTO_memcmp(tag, EVP_CIPHER_CTX_buf_noconst(ctx),

                                   cctx->M))

                    rv = len;

            }

        }

        if (rv == -1)

            OPENSSL_cleanse(out, len);

        cctx->iv_set = 0;

        cctx->tag_set = 0;

        cctx->len_set = 0;

        return rv;

    }

}

#define aria_ccm_cleanup    NULL

#define ARIA_AUTH_FLAGS  (EVP_CIPH_FLAG_DEFAULT_ASN1 \

                          | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \

                          | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \

                          | EVP_CIPH_CUSTOM_COPY | EVP_CIPH_FLAG_AEAD_CIPHER \

                          | EVP_CIPH_CUSTOM_IV_LENGTH)

#define BLOCK_CIPHER_aead(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \

static const EVP_CIPHER aria_##keylen##_##mode = { \

        nid##_##keylen##_##nmode,                  \

        blocksize, keylen/8, ivlen,                \

        ARIA_AUTH_FLAGS|EVP_CIPH_##MODE##_MODE,    \

        aria_##mode##_init_key,                    \

        aria_##mode##_cipher,                      \

        aria_##mode##_cleanup,                     \

        sizeof(EVP_ARIA_##MODE##_CTX),             \

        NULL,NULL,aria_##mode##_ctrl,NULL };       \

const EVP_CIPHER *EVP_aria_##keylen##_##mode(void) \

{ return (EVP_CIPHER*)&aria_##keylen##_##mode; }

BLOCK_CIPHER_aead(NID_aria, 128, 1, 12, gcm, gcm, GCM, 0)

BLOCK_CIPHER_aead(NID_aria, 192, 1, 12, gcm, gcm, GCM, 0)

BLOCK_CIPHER_aead(NID_aria, 256, 1, 12, gcm, gcm, GCM, 0)

BLOCK_CIPHER_aead(NID_aria, 128, 1, 12, ccm, ccm, CCM, 0)

BLOCK_CIPHER_aead(NID_aria, 192, 1, 12, ccm, ccm, CCM, 0)

BLOCK_CIPHER_aead(NID_aria, 256, 1, 12, ccm, ccm, CCM, 0)

#endif