Removed old mbedtls, replacing with submodule.

1 files changed, 0 insertions, 1633 deletions

diff --git a/lib/mbedtls-2.27.0/library/cipher.c b/lib/mbedtls-2.27.0/library/cipher.c
deleted file mode 100644
index 457f8f6..0000000
--- a/lib/mbedtls-2.27.0/library/cipher.c
+++ /dev/null
@@ -1,1633 +0,0 @@
-/**
- * \file cipher.c
- *
- * \brief Generic cipher wrapper for mbed TLS
- *
- * \author Adriaan de Jong <dejong@fox-it.com>
- *
- *  Copyright The Mbed TLS Contributors
- *  SPDX-License-Identifier: Apache-2.0
- *
- *  Licensed under the Apache License, Version 2.0 (the "License"); you may
- *  not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *  http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-
-#include "common.h"
-
-#if defined(MBEDTLS_CIPHER_C)
-
-#include "mbedtls/cipher.h"
-#include "mbedtls/cipher_internal.h"
-#include "mbedtls/platform_util.h"
-#include "mbedtls/error.h"
-
-#include <stdlib.h>
-#include <string.h>
-
-#if defined(MBEDTLS_CHACHAPOLY_C)
-#include "mbedtls/chachapoly.h"
-#endif
-
-#if defined(MBEDTLS_GCM_C)
-#include "mbedtls/gcm.h"
-#endif
-
-#if defined(MBEDTLS_CCM_C)
-#include "mbedtls/ccm.h"
-#endif
-
-#if defined(MBEDTLS_CHACHA20_C)
-#include "mbedtls/chacha20.h"
-#endif
-
-#if defined(MBEDTLS_CMAC_C)
-#include "mbedtls/cmac.h"
-#endif
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-#include "psa/crypto.h"
-#include "mbedtls/psa_util.h"
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
-#if defined(MBEDTLS_NIST_KW_C)
-#include "mbedtls/nist_kw.h"
-#endif
-
-#if defined(MBEDTLS_PLATFORM_C)
-#include "mbedtls/platform.h"
-#else
-#define mbedtls_calloc calloc
-#define mbedtls_free   free
-#endif
-
-#define CIPHER_VALIDATE_RET( cond )    \
-    MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA )
-#define CIPHER_VALIDATE( cond )        \
-    MBEDTLS_INTERNAL_VALIDATE( cond )
-
-#if defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CHACHAPOLY_C)
-/* Compare the contents of two buffers in constant time.
- * Returns 0 if the contents are bitwise identical, otherwise returns
- * a non-zero value.
- * This is currently only used by GCM and ChaCha20+Poly1305.
- */
-static int mbedtls_constant_time_memcmp( const void *v1, const void *v2,
-                                         size_t len )
-{
-    const unsigned char *p1 = (const unsigned char*) v1;
-    const unsigned char *p2 = (const unsigned char*) v2;
-    size_t i;
-    unsigned char diff;
-
-    for( diff = 0, i = 0; i < len; i++ )
-        diff |= p1[i] ^ p2[i];
-
-    return( (int)diff );
-}
-#endif /* MBEDTLS_GCM_C || MBEDTLS_CHACHAPOLY_C */
-
-static int supported_init = 0;
-
-const int *mbedtls_cipher_list( void )
-{
-    const mbedtls_cipher_definition_t *def;
-    int *type;
-
-    if( ! supported_init )
-    {
-        def = mbedtls_cipher_definitions;
-        type = mbedtls_cipher_supported;
-
-        while( def->type != 0 )
-            *type++ = (*def++).type;
-
-        *type = 0;
-
-        supported_init = 1;
-    }
-
-    return( mbedtls_cipher_supported );
-}
-
-const mbedtls_cipher_info_t *mbedtls_cipher_info_from_type(
-    const mbedtls_cipher_type_t cipher_type )
-{
-    const mbedtls_cipher_definition_t *def;
-
-    for( def = mbedtls_cipher_definitions; def->info != NULL; def++ )
-        if( def->type == cipher_type )
-            return( def->info );
-
-    return( NULL );
-}
-
-const mbedtls_cipher_info_t *mbedtls_cipher_info_from_string(
-    const char *cipher_name )
-{
-    const mbedtls_cipher_definition_t *def;
-
-    if( NULL == cipher_name )
-        return( NULL );
-
-    for( def = mbedtls_cipher_definitions; def->info != NULL; def++ )
-        if( !  strcmp( def->info->name, cipher_name ) )
-            return( def->info );
-
-    return( NULL );
-}
-
-const mbedtls_cipher_info_t *mbedtls_cipher_info_from_values(
-    const mbedtls_cipher_id_t cipher_id,
-    int key_bitlen,
-    const mbedtls_cipher_mode_t mode )
-{
-    const mbedtls_cipher_definition_t *def;
-
-    for( def = mbedtls_cipher_definitions; def->info != NULL; def++ )
-        if( def->info->base->cipher == cipher_id &&
-            def->info->key_bitlen == (unsigned) key_bitlen &&
-            def->info->mode == mode )
-            return( def->info );
-
-    return( NULL );
-}
-
-void mbedtls_cipher_init( mbedtls_cipher_context_t *ctx )
-{
-    CIPHER_VALIDATE( ctx != NULL );
-    memset( ctx, 0, sizeof( mbedtls_cipher_context_t ) );
-}
-
-void mbedtls_cipher_free( mbedtls_cipher_context_t *ctx )
-{
-    if( ctx == NULL )
-        return;
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
-        if( ctx->cipher_ctx != NULL )
-        {
-            mbedtls_cipher_context_psa * const cipher_psa =
-                (mbedtls_cipher_context_psa *) ctx->cipher_ctx;
-
-            if( cipher_psa->slot_state == MBEDTLS_CIPHER_PSA_KEY_OWNED )
-            {
-                /* xxx_free() doesn't allow to return failures. */
-                (void) psa_destroy_key( cipher_psa->slot );
-            }
-
-            mbedtls_platform_zeroize( cipher_psa, sizeof( *cipher_psa ) );
-            mbedtls_free( cipher_psa );
-        }
-
-        mbedtls_platform_zeroize( ctx, sizeof(mbedtls_cipher_context_t) );
-        return;
-    }
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
-#if defined(MBEDTLS_CMAC_C)
-    if( ctx->cmac_ctx )
-    {
-       mbedtls_platform_zeroize( ctx->cmac_ctx,
-                                 sizeof( mbedtls_cmac_context_t ) );
-       mbedtls_free( ctx->cmac_ctx );
-    }
-#endif
-
-    if( ctx->cipher_ctx )
-        ctx->cipher_info->base->ctx_free_func( ctx->cipher_ctx );
-
-    mbedtls_platform_zeroize( ctx, sizeof(mbedtls_cipher_context_t) );
-}
-
-int mbedtls_cipher_setup( mbedtls_cipher_context_t *ctx,
-                          const mbedtls_cipher_info_t *cipher_info )
-{
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    if( cipher_info == NULL )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-    memset( ctx, 0, sizeof( mbedtls_cipher_context_t ) );
-
-    if( NULL == ( ctx->cipher_ctx = cipher_info->base->ctx_alloc_func() ) )
-        return( MBEDTLS_ERR_CIPHER_ALLOC_FAILED );
-
-    ctx->cipher_info = cipher_info;
-
-#if defined(MBEDTLS_CIPHER_MODE_WITH_PADDING)
-    /*
-     * Ignore possible errors caused by a cipher mode that doesn't use padding
-     */
-#if defined(MBEDTLS_CIPHER_PADDING_PKCS7)
-    (void) mbedtls_cipher_set_padding_mode( ctx, MBEDTLS_PADDING_PKCS7 );
-#else
-    (void) mbedtls_cipher_set_padding_mode( ctx, MBEDTLS_PADDING_NONE );
-#endif
-#endif /* MBEDTLS_CIPHER_MODE_WITH_PADDING */
-
-    return( 0 );
-}
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-int mbedtls_cipher_setup_psa( mbedtls_cipher_context_t *ctx,
-                              const mbedtls_cipher_info_t *cipher_info,
-                              size_t taglen )
-{
-    psa_algorithm_t alg;
-    mbedtls_cipher_context_psa *cipher_psa;
-
-    if( NULL == cipher_info || NULL == ctx )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-    /* Check that the underlying cipher mode and cipher type are
-     * supported by the underlying PSA Crypto implementation. */
-    alg = mbedtls_psa_translate_cipher_mode( cipher_info->mode, taglen );
-    if( alg == 0 )
-        return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
-    if( mbedtls_psa_translate_cipher_type( cipher_info->type ) == 0 )
-        return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
-
-    memset( ctx, 0, sizeof( mbedtls_cipher_context_t ) );
-
-    cipher_psa = mbedtls_calloc( 1, sizeof(mbedtls_cipher_context_psa ) );
-    if( cipher_psa == NULL )
-        return( MBEDTLS_ERR_CIPHER_ALLOC_FAILED );
-    cipher_psa->alg  = alg;
-    ctx->cipher_ctx  = cipher_psa;
-    ctx->cipher_info = cipher_info;
-    ctx->psa_enabled = 1;
-    return( 0 );
-}
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
-int mbedtls_cipher_setkey( mbedtls_cipher_context_t *ctx,
-                           const unsigned char *key,
-                           int key_bitlen,
-                           const mbedtls_operation_t operation )
-{
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    CIPHER_VALIDATE_RET( key != NULL );
-    CIPHER_VALIDATE_RET( operation == MBEDTLS_ENCRYPT ||
-                         operation == MBEDTLS_DECRYPT );
-    if( ctx->cipher_info == NULL )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
-        mbedtls_cipher_context_psa * const cipher_psa =
-            (mbedtls_cipher_context_psa *) ctx->cipher_ctx;
-
-        size_t const key_bytelen = ( (size_t) key_bitlen + 7 ) / 8;
-
-        psa_status_t status;
-        psa_key_type_t key_type;
-        psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
-
-        /* PSA Crypto API only accepts byte-aligned keys. */
-        if( key_bitlen % 8 != 0 )
-            return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-        /* Don't allow keys to be set multiple times. */
-        if( cipher_psa->slot_state != MBEDTLS_CIPHER_PSA_KEY_UNSET )
-            return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-        key_type = mbedtls_psa_translate_cipher_type(
-            ctx->cipher_info->type );
-        if( key_type == 0 )
-            return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
-        psa_set_key_type( &attributes, key_type );
-
-        /* Mbed TLS' cipher layer doesn't enforce the mode of operation
-         * (encrypt vs. decrypt): it is possible to setup a key for encryption
-         * and use it for AEAD decryption. Until tests relying on this
-         * are changed, allow any usage in PSA. */
-        psa_set_key_usage_flags( &attributes,
-                                 /* mbedtls_psa_translate_cipher_operation( operation ); */
-                                 PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT );
-        psa_set_key_algorithm( &attributes, cipher_psa->alg );
-
-        status = psa_import_key( &attributes, key, key_bytelen,
-                                 &cipher_psa->slot );
-        switch( status )
-        {
-            case PSA_SUCCESS:
-                break;
-            case PSA_ERROR_INSUFFICIENT_MEMORY:
-                return( MBEDTLS_ERR_CIPHER_ALLOC_FAILED );
-            case PSA_ERROR_NOT_SUPPORTED:
-                return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
-            default:
-                return( MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED );
-        }
-        /* Indicate that we own the key slot and need to
-         * destroy it in mbedtls_cipher_free(). */
-        cipher_psa->slot_state = MBEDTLS_CIPHER_PSA_KEY_OWNED;
-
-        ctx->key_bitlen = key_bitlen;
-        ctx->operation = operation;
-        return( 0 );
-    }
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
-    if( ( ctx->cipher_info->flags & MBEDTLS_CIPHER_VARIABLE_KEY_LEN ) == 0 &&
-        (int) ctx->cipher_info->key_bitlen != key_bitlen )
-    {
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-    }
-
-    ctx->key_bitlen = key_bitlen;
-    ctx->operation = operation;
-
-    /*
-     * For OFB, CFB and CTR mode always use the encryption key schedule
-     */
-    if( MBEDTLS_ENCRYPT == operation ||
-        MBEDTLS_MODE_CFB == ctx->cipher_info->mode ||
-        MBEDTLS_MODE_OFB == ctx->cipher_info->mode ||
-        MBEDTLS_MODE_CTR == ctx->cipher_info->mode )
-    {
-        return( ctx->cipher_info->base->setkey_enc_func( ctx->cipher_ctx, key,
-                                                         ctx->key_bitlen ) );
-    }
-
-    if( MBEDTLS_DECRYPT == operation )
-        return( ctx->cipher_info->base->setkey_dec_func( ctx->cipher_ctx, key,
-                                                         ctx->key_bitlen ) );
-
-    return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-}
-
-int mbedtls_cipher_set_iv( mbedtls_cipher_context_t *ctx,
-                           const unsigned char *iv,
-                           size_t iv_len )
-{
-    size_t actual_iv_size;
-
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    CIPHER_VALIDATE_RET( iv_len == 0 || iv != NULL );
-    if( ctx->cipher_info == NULL )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
-        /* While PSA Crypto has an API for multipart
-         * operations, we currently don't make it
-         * accessible through the cipher layer. */
-        return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
-    }
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
-    /* avoid buffer overflow in ctx->iv */
-    if( iv_len > MBEDTLS_MAX_IV_LENGTH )
-        return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
-
-    if( ( ctx->cipher_info->flags & MBEDTLS_CIPHER_VARIABLE_IV_LEN ) != 0 )
-        actual_iv_size = iv_len;
-    else
-    {
-        actual_iv_size = ctx->cipher_info->iv_size;
-
-        /* avoid reading past the end of input buffer */
-        if( actual_iv_size > iv_len )
-            return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-    }
-
-#if defined(MBEDTLS_CHACHA20_C)
-    if ( ctx->cipher_info->type == MBEDTLS_CIPHER_CHACHA20 )
-    {
-        if ( 0 != mbedtls_chacha20_starts( (mbedtls_chacha20_context*)ctx->cipher_ctx,
-                                           iv,
-                                           0U ) ) /* Initial counter value */
-        {
-            return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-        }
-    }
-#endif
-
-    if ( actual_iv_size != 0 )
-    {
-        memcpy( ctx->iv, iv, actual_iv_size );
-        ctx->iv_size = actual_iv_size;
-    }
-
-    return( 0 );
-}
-
-int mbedtls_cipher_reset( mbedtls_cipher_context_t *ctx )
-{
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    if( ctx->cipher_info == NULL )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
-        /* We don't support resetting PSA-based
-         * cipher contexts, yet. */
-        return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
-    }
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
-    ctx->unprocessed_len = 0;
-
-    return( 0 );
-}
-
-#if defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CHACHAPOLY_C)
-int mbedtls_cipher_update_ad( mbedtls_cipher_context_t *ctx,
-                      const unsigned char *ad, size_t ad_len )
-{
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    CIPHER_VALIDATE_RET( ad_len == 0 || ad != NULL );
-    if( ctx->cipher_info == NULL )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
-        /* While PSA Crypto has an API for multipart
-         * operations, we currently don't make it
-         * accessible through the cipher layer. */
-        return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
-    }
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
-#if defined(MBEDTLS_GCM_C)
-    if( MBEDTLS_MODE_GCM == ctx->cipher_info->mode )
-    {
-        return( mbedtls_gcm_starts( (mbedtls_gcm_context *) ctx->cipher_ctx, ctx->operation,
-                                    ctx->iv, ctx->iv_size, ad, ad_len ) );
-    }
-#endif
-
-#if defined(MBEDTLS_CHACHAPOLY_C)
-    if (MBEDTLS_CIPHER_CHACHA20_POLY1305 == ctx->cipher_info->type )
-    {
-        int result;
-        mbedtls_chachapoly_mode_t mode;
-
-        mode = ( ctx->operation == MBEDTLS_ENCRYPT )
-                ? MBEDTLS_CHACHAPOLY_ENCRYPT
-                : MBEDTLS_CHACHAPOLY_DECRYPT;
-
-        result = mbedtls_chachapoly_starts( (mbedtls_chachapoly_context*) ctx->cipher_ctx,
-                                                        ctx->iv,
-                                                        mode );
-        if ( result != 0 )
-            return( result );
-
-        return( mbedtls_chachapoly_update_aad( (mbedtls_chachapoly_context*) ctx->cipher_ctx,
-                                               ad, ad_len ) );
-    }
-#endif
-
-    return( 0 );
-}
-#endif /* MBEDTLS_GCM_C || MBEDTLS_CHACHAPOLY_C */
-
-int mbedtls_cipher_update( mbedtls_cipher_context_t *ctx, const unsigned char *input,
-                   size_t ilen, unsigned char *output, size_t *olen )
-{
-    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-    size_t block_size;
-
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    CIPHER_VALIDATE_RET( ilen == 0 || input != NULL );
-    CIPHER_VALIDATE_RET( output != NULL );
-    CIPHER_VALIDATE_RET( olen != NULL );
-    if( ctx->cipher_info == NULL )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
-        /* While PSA Crypto has an API for multipart
-         * operations, we currently don't make it
-         * accessible through the cipher layer. */
-        return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
-    }
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
-    *olen = 0;
-    block_size = mbedtls_cipher_get_block_size( ctx );
-    if ( 0 == block_size )
-    {
-        return( MBEDTLS_ERR_CIPHER_INVALID_CONTEXT );
-    }
-
-    if( ctx->cipher_info->mode == MBEDTLS_MODE_ECB )
-    {
-        if( ilen != block_size )
-            return( MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED );
-
-        *olen = ilen;
-
-        if( 0 != ( ret = ctx->cipher_info->base->ecb_func( ctx->cipher_ctx,
-                    ctx->operation, input, output ) ) )
-        {
-            return( ret );
-        }
-
-        return( 0 );
-    }
-
-#if defined(MBEDTLS_GCM_C)
-    if( ctx->cipher_info->mode == MBEDTLS_MODE_GCM )
-    {
-        *olen = ilen;
-        return( mbedtls_gcm_update( (mbedtls_gcm_context *) ctx->cipher_ctx, ilen, input,
-                                    output ) );
-    }
-#endif
-
-#if defined(MBEDTLS_CHACHAPOLY_C)
-    if ( ctx->cipher_info->type == MBEDTLS_CIPHER_CHACHA20_POLY1305 )
-    {
-        *olen = ilen;
-        return( mbedtls_chachapoly_update( (mbedtls_chachapoly_context*) ctx->cipher_ctx,
-                                           ilen, input, output ) );
-    }
-#endif
-
-    if( input == output &&
-       ( ctx->unprocessed_len != 0 || ilen % block_size ) )
-    {
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-    }
-
-#if defined(MBEDTLS_CIPHER_MODE_CBC)
-    if( ctx->cipher_info->mode == MBEDTLS_MODE_CBC )
-    {
-        size_t copy_len = 0;
-
-        /*
-         * If there is not enough data for a full block, cache it.
-         */
-        if( ( ctx->operation == MBEDTLS_DECRYPT && NULL != ctx->add_padding &&
-                ilen <= block_size - ctx->unprocessed_len ) ||
-            ( ctx->operation == MBEDTLS_DECRYPT && NULL == ctx->add_padding &&
-                ilen < block_size - ctx->unprocessed_len ) ||
-             ( ctx->operation == MBEDTLS_ENCRYPT &&
-                ilen < block_size - ctx->unprocessed_len ) )
-        {
-            memcpy( &( ctx->unprocessed_data[ctx->unprocessed_len] ), input,
-                    ilen );
-
-            ctx->unprocessed_len += ilen;
-            return( 0 );
-        }
-
-        /*
-         * Process cached data first
-         */
-        if( 0 != ctx->unprocessed_len )
-        {
-            copy_len = block_size - ctx->unprocessed_len;
-
-            memcpy( &( ctx->unprocessed_data[ctx->unprocessed_len] ), input,
-                    copy_len );
-
-            if( 0 != ( ret = ctx->cipher_info->base->cbc_func( ctx->cipher_ctx,
-                    ctx->operation, block_size, ctx->iv,
-                    ctx->unprocessed_data, output ) ) )
-            {
-                return( ret );
-            }
-
-            *olen += block_size;
-            output += block_size;
-            ctx->unprocessed_len = 0;
-
-            input += copy_len;
-            ilen -= copy_len;
-        }
-
-        /*
-         * Cache final, incomplete block
-         */
-        if( 0 != ilen )
-        {
-            /* Encryption: only cache partial blocks
-             * Decryption w/ padding: always keep at least one whole block
-             * Decryption w/o padding: only cache partial blocks
-             */
-            copy_len = ilen % block_size;
-            if( copy_len == 0 &&
-                ctx->operation == MBEDTLS_DECRYPT &&
-                NULL != ctx->add_padding)
-            {
-                copy_len = block_size;
-            }
-
-            memcpy( ctx->unprocessed_data, &( input[ilen - copy_len] ),
-                    copy_len );
-
-            ctx->unprocessed_len += copy_len;
-            ilen -= copy_len;
-        }
-
-        /*
-         * Process remaining full blocks
-         */
-        if( ilen )
-        {
-            if( 0 != ( ret = ctx->cipher_info->base->cbc_func( ctx->cipher_ctx,
-                    ctx->operation, ilen, ctx->iv, input, output ) ) )
-            {
-                return( ret );
-            }
-
-            *olen += ilen;
-        }
-
-        return( 0 );
-    }
-#endif /* MBEDTLS_CIPHER_MODE_CBC */
-
-#if defined(MBEDTLS_CIPHER_MODE_CFB)
-    if( ctx->cipher_info->mode == MBEDTLS_MODE_CFB )
-    {
-        if( 0 != ( ret = ctx->cipher_info->base->cfb_func( ctx->cipher_ctx,
-                ctx->operation, ilen, &ctx->unprocessed_len, ctx->iv,
-                input, output ) ) )
-        {
-            return( ret );
-        }
-
-        *olen = ilen;
-
-        return( 0 );
-    }
-#endif /* MBEDTLS_CIPHER_MODE_CFB */
-
-#if defined(MBEDTLS_CIPHER_MODE_OFB)
-    if( ctx->cipher_info->mode == MBEDTLS_MODE_OFB )
-    {
-        if( 0 != ( ret = ctx->cipher_info->base->ofb_func( ctx->cipher_ctx,
-                ilen, &ctx->unprocessed_len, ctx->iv, input, output ) ) )
-        {
-            return( ret );
-        }
-
-        *olen = ilen;
-
-        return( 0 );
-    }
-#endif /* MBEDTLS_CIPHER_MODE_OFB */
-
-#if defined(MBEDTLS_CIPHER_MODE_CTR)
-    if( ctx->cipher_info->mode == MBEDTLS_MODE_CTR )
-    {
-        if( 0 != ( ret = ctx->cipher_info->base->ctr_func( ctx->cipher_ctx,
-                ilen, &ctx->unprocessed_len, ctx->iv,
-                ctx->unprocessed_data, input, output ) ) )
-        {
-            return( ret );
-        }
-
-        *olen = ilen;
-
-        return( 0 );
-    }
-#endif /* MBEDTLS_CIPHER_MODE_CTR */
-
-#if defined(MBEDTLS_CIPHER_MODE_XTS)
-    if( ctx->cipher_info->mode == MBEDTLS_MODE_XTS )
-    {
-        if( ctx->unprocessed_len > 0 ) {
-            /* We can only process an entire data unit at a time. */
-            return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
-        }
-
-        ret = ctx->cipher_info->base->xts_func( ctx->cipher_ctx,
-                ctx->operation, ilen, ctx->iv, input, output );
-        if( ret != 0 )
-        {
-            return( ret );
-        }
-
-        *olen = ilen;
-
-        return( 0 );
-    }
-#endif /* MBEDTLS_CIPHER_MODE_XTS */
-
-#if defined(MBEDTLS_CIPHER_MODE_STREAM)
-    if( ctx->cipher_info->mode == MBEDTLS_MODE_STREAM )
-    {
-        if( 0 != ( ret = ctx->cipher_info->base->stream_func( ctx->cipher_ctx,
-                                                    ilen, input, output ) ) )
-        {
-            return( ret );
-        }
-
-        *olen = ilen;
-
-        return( 0 );
-    }
-#endif /* MBEDTLS_CIPHER_MODE_STREAM */
-
-    return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
-}
-
-#if defined(MBEDTLS_CIPHER_MODE_WITH_PADDING)
-#if defined(MBEDTLS_CIPHER_PADDING_PKCS7)
-/*
- * PKCS7 (and PKCS5) padding: fill with ll bytes, with ll = padding_len
- */
-static void add_pkcs_padding( unsigned char *output, size_t output_len,
-        size_t data_len )
-{
-    size_t padding_len = output_len - data_len;
-    unsigned char i;
-
-    for( i = 0; i < padding_len; i++ )
-        output[data_len + i] = (unsigned char) padding_len;
-}
-
-static int get_pkcs_padding( unsigned char *input, size_t input_len,
-        size_t *data_len )
-{
-    size_t i, pad_idx;
-    unsigned char padding_len, bad = 0;
-
-    if( NULL == input || NULL == data_len )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-    padding_len = input[input_len - 1];
-    *data_len = input_len - padding_len;
-
-    /* Avoid logical || since it results in a branch */
-    bad |= padding_len > input_len;
-    bad |= padding_len == 0;
-
-    /* The number of bytes checked must be independent of padding_len,
-     * so pick input_len, which is usually 8 or 16 (one block) */
-    pad_idx = input_len - padding_len;
-    for( i = 0; i < input_len; i++ )
-        bad |= ( input[i] ^ padding_len ) * ( i >= pad_idx );
-
-    return( MBEDTLS_ERR_CIPHER_INVALID_PADDING * ( bad != 0 ) );
-}
-#endif /* MBEDTLS_CIPHER_PADDING_PKCS7 */
-
-#if defined(MBEDTLS_CIPHER_PADDING_ONE_AND_ZEROS)
-/*
- * One and zeros padding: fill with 80 00 ... 00
- */
-static void add_one_and_zeros_padding( unsigned char *output,
-                                       size_t output_len, size_t data_len )
-{
-    size_t padding_len = output_len - data_len;
-    unsigned char i = 0;
-
-    output[data_len] = 0x80;
-    for( i = 1; i < padding_len; i++ )
-        output[data_len + i] = 0x00;
-}
-
-static int get_one_and_zeros_padding( unsigned char *input, size_t input_len,
-                                      size_t *data_len )
-{
-    size_t i;
-    unsigned char done = 0, prev_done, bad;
-
-    if( NULL == input || NULL == data_len )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-    bad = 0x80;
-    *data_len = 0;
-    for( i = input_len; i > 0; i-- )
-    {
-        prev_done = done;
-        done |= ( input[i - 1] != 0 );
-        *data_len |= ( i - 1 ) * ( done != prev_done );
-        bad ^= input[i - 1] * ( done != prev_done );
-    }
-
-    return( MBEDTLS_ERR_CIPHER_INVALID_PADDING * ( bad != 0 ) );
-
-}
-#endif /* MBEDTLS_CIPHER_PADDING_ONE_AND_ZEROS */
-
-#if defined(MBEDTLS_CIPHER_PADDING_ZEROS_AND_LEN)
-/*
- * Zeros and len padding: fill with 00 ... 00 ll, where ll is padding length
- */
-static void add_zeros_and_len_padding( unsigned char *output,
-                                       size_t output_len, size_t data_len )
-{
-    size_t padding_len = output_len - data_len;
-    unsigned char i = 0;
-
-    for( i = 1; i < padding_len; i++ )
-        output[data_len + i - 1] = 0x00;
-    output[output_len - 1] = (unsigned char) padding_len;
-}
-
-static int get_zeros_and_len_padding( unsigned char *input, size_t input_len,
-                                      size_t *data_len )
-{
-    size_t i, pad_idx;
-    unsigned char padding_len, bad = 0;
-
-    if( NULL == input || NULL == data_len )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-    padding_len = input[input_len - 1];
-    *data_len = input_len - padding_len;
-
-    /* Avoid logical || since it results in a branch */
-    bad |= padding_len > input_len;
-    bad |= padding_len == 0;
-
-    /* The number of bytes checked must be independent of padding_len */
-    pad_idx = input_len - padding_len;
-    for( i = 0; i < input_len - 1; i++ )
-        bad |= input[i] * ( i >= pad_idx );
-
-    return( MBEDTLS_ERR_CIPHER_INVALID_PADDING * ( bad != 0 ) );
-}
-#endif /* MBEDTLS_CIPHER_PADDING_ZEROS_AND_LEN */
-
-#if defined(MBEDTLS_CIPHER_PADDING_ZEROS)
-/*
- * Zero padding: fill with 00 ... 00
- */
-static void add_zeros_padding( unsigned char *output,
-                               size_t output_len, size_t data_len )
-{
-    size_t i;
-
-    for( i = data_len; i < output_len; i++ )
-        output[i] = 0x00;
-}
-
-static int get_zeros_padding( unsigned char *input, size_t input_len,
-                              size_t *data_len )
-{
-    size_t i;
-    unsigned char done = 0, prev_done;
-
-    if( NULL == input || NULL == data_len )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-    *data_len = 0;
-    for( i = input_len; i > 0; i-- )
-    {
-        prev_done = done;
-        done |= ( input[i-1] != 0 );
-        *data_len |= i * ( done != prev_done );
-    }
-
-    return( 0 );
-}
-#endif /* MBEDTLS_CIPHER_PADDING_ZEROS */
-
-/*
- * No padding: don't pad :)
- *
- * There is no add_padding function (check for NULL in mbedtls_cipher_finish)
- * but a trivial get_padding function
- */
-static int get_no_padding( unsigned char *input, size_t input_len,
-                              size_t *data_len )
-{
-    if( NULL == input || NULL == data_len )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-    *data_len = input_len;
-
-    return( 0 );
-}
-#endif /* MBEDTLS_CIPHER_MODE_WITH_PADDING */
-
-int mbedtls_cipher_finish( mbedtls_cipher_context_t *ctx,
-                   unsigned char *output, size_t *olen )
-{
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    CIPHER_VALIDATE_RET( output != NULL );
-    CIPHER_VALIDATE_RET( olen != NULL );
-    if( ctx->cipher_info == NULL )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
-        /* While PSA Crypto has an API for multipart
-         * operations, we currently don't make it
-         * accessible through the cipher layer. */
-        return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
-    }
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
-    *olen = 0;
-
-    if( MBEDTLS_MODE_CFB == ctx->cipher_info->mode ||
-        MBEDTLS_MODE_OFB == ctx->cipher_info->mode ||
-        MBEDTLS_MODE_CTR == ctx->cipher_info->mode ||
-        MBEDTLS_MODE_GCM == ctx->cipher_info->mode ||
-        MBEDTLS_MODE_XTS == ctx->cipher_info->mode ||
-        MBEDTLS_MODE_STREAM == ctx->cipher_info->mode )
-    {
-        return( 0 );
-    }
-
-    if ( ( MBEDTLS_CIPHER_CHACHA20          == ctx->cipher_info->type ) ||
-         ( MBEDTLS_CIPHER_CHACHA20_POLY1305 == ctx->cipher_info->type ) )
-    {
-        return( 0 );
-    }
-
-    if( MBEDTLS_MODE_ECB == ctx->cipher_info->mode )
-    {
-        if( ctx->unprocessed_len != 0 )
-            return( MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED );
-
-        return( 0 );
-    }
-
-#if defined(MBEDTLS_CIPHER_MODE_CBC)
-    if( MBEDTLS_MODE_CBC == ctx->cipher_info->mode )
-    {
-        int ret = 0;
-
-        if( MBEDTLS_ENCRYPT == ctx->operation )
-        {
-            /* check for 'no padding' mode */
-            if( NULL == ctx->add_padding )
-            {
-                if( 0 != ctx->unprocessed_len )
-                    return( MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED );
-
-                return( 0 );
-            }
-
-            ctx->add_padding( ctx->unprocessed_data, mbedtls_cipher_get_iv_size( ctx ),
-                    ctx->unprocessed_len );
-        }
-        else if( mbedtls_cipher_get_block_size( ctx ) != ctx->unprocessed_len )
-        {
-            /*
-             * For decrypt operations, expect a full block,
-             * or an empty block if no padding
-             */
-            if( NULL == ctx->add_padding && 0 == ctx->unprocessed_len )
-                return( 0 );
-
-            return( MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED );
-        }
-
-        /* cipher block */
-        if( 0 != ( ret = ctx->cipher_info->base->cbc_func( ctx->cipher_ctx,
-                ctx->operation, mbedtls_cipher_get_block_size( ctx ), ctx->iv,
-                ctx->unprocessed_data, output ) ) )
-        {
-            return( ret );
-        }
-
-        /* Set output size for decryption */
-        if( MBEDTLS_DECRYPT == ctx->operation )
-            return( ctx->get_padding( output, mbedtls_cipher_get_block_size( ctx ),
-                                      olen ) );
-
-        /* Set output size for encryption */
-        *olen = mbedtls_cipher_get_block_size( ctx );
-        return( 0 );
-    }
-#else
-    ((void) output);
-#endif /* MBEDTLS_CIPHER_MODE_CBC */
-
-    return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
-}
-
-#if defined(MBEDTLS_CIPHER_MODE_WITH_PADDING)
-int mbedtls_cipher_set_padding_mode( mbedtls_cipher_context_t *ctx,
-                                     mbedtls_cipher_padding_t mode )
-{
-    CIPHER_VALIDATE_RET( ctx != NULL );
-
-    if( NULL == ctx->cipher_info || MBEDTLS_MODE_CBC != ctx->cipher_info->mode )
-    {
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-    }
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
-        /* While PSA Crypto knows about CBC padding
-         * schemes, we currently don't make them
-         * accessible through the cipher layer. */
-        if( mode != MBEDTLS_PADDING_NONE )
-            return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
-
-        return( 0 );
-    }
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
-    switch( mode )
-    {
-#if defined(MBEDTLS_CIPHER_PADDING_PKCS7)
-    case MBEDTLS_PADDING_PKCS7:
-        ctx->add_padding = add_pkcs_padding;
-        ctx->get_padding = get_pkcs_padding;
-        break;
-#endif
-#if defined(MBEDTLS_CIPHER_PADDING_ONE_AND_ZEROS)
-    case MBEDTLS_PADDING_ONE_AND_ZEROS:
-        ctx->add_padding = add_one_and_zeros_padding;
-        ctx->get_padding = get_one_and_zeros_padding;
-        break;
-#endif
-#if defined(MBEDTLS_CIPHER_PADDING_ZEROS_AND_LEN)
-    case MBEDTLS_PADDING_ZEROS_AND_LEN:
-        ctx->add_padding = add_zeros_and_len_padding;
-        ctx->get_padding = get_zeros_and_len_padding;
-        break;
-#endif
-#if defined(MBEDTLS_CIPHER_PADDING_ZEROS)
-    case MBEDTLS_PADDING_ZEROS:
-        ctx->add_padding = add_zeros_padding;
-        ctx->get_padding = get_zeros_padding;
-        break;
-#endif
-    case MBEDTLS_PADDING_NONE:
-        ctx->add_padding = NULL;
-        ctx->get_padding = get_no_padding;
-        break;
-
-    default:
-        return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
-    }
-
-    return( 0 );
-}
-#endif /* MBEDTLS_CIPHER_MODE_WITH_PADDING */
-
-#if defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CHACHAPOLY_C)
-int mbedtls_cipher_write_tag( mbedtls_cipher_context_t *ctx,
-                      unsigned char *tag, size_t tag_len )
-{
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    CIPHER_VALIDATE_RET( tag_len == 0 || tag != NULL );
-    if( ctx->cipher_info == NULL )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-    if( MBEDTLS_ENCRYPT != ctx->operation )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
-        /* While PSA Crypto has an API for multipart
-         * operations, we currently don't make it
-         * accessible through the cipher layer. */
-        return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
-    }
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
-#if defined(MBEDTLS_GCM_C)
-    if( MBEDTLS_MODE_GCM == ctx->cipher_info->mode )
-        return( mbedtls_gcm_finish( (mbedtls_gcm_context *) ctx->cipher_ctx,
-                                    tag, tag_len ) );
-#endif
-
-#if defined(MBEDTLS_CHACHAPOLY_C)
-    if ( MBEDTLS_CIPHER_CHACHA20_POLY1305 == ctx->cipher_info->type )
-    {
-        /* Don't allow truncated MAC for Poly1305 */
-        if ( tag_len != 16U )
-            return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-        return( mbedtls_chachapoly_finish(
-                    (mbedtls_chachapoly_context*) ctx->cipher_ctx, tag ) );
-    }
-#endif
-
-    return( 0 );
-}
-
-int mbedtls_cipher_check_tag( mbedtls_cipher_context_t *ctx,
-                      const unsigned char *tag, size_t tag_len )
-{
-    unsigned char check_tag[16];
-    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    CIPHER_VALIDATE_RET( tag_len == 0 || tag != NULL );
-    if( ctx->cipher_info == NULL )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-    if( MBEDTLS_DECRYPT != ctx->operation )
-    {
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-    }
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
-        /* While PSA Crypto has an API for multipart
-         * operations, we currently don't make it
-         * accessible through the cipher layer. */
-        return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
-    }
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
-#if defined(MBEDTLS_GCM_C)
-    if( MBEDTLS_MODE_GCM == ctx->cipher_info->mode )
-    {
-        if( tag_len > sizeof( check_tag ) )
-            return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-        if( 0 != ( ret = mbedtls_gcm_finish(
-                       (mbedtls_gcm_context *) ctx->cipher_ctx,
-                       check_tag, tag_len ) ) )
-        {
-            return( ret );
-        }
-
-        /* Check the tag in "constant-time" */
-        if( mbedtls_constant_time_memcmp( tag, check_tag, tag_len ) != 0 )
-            return( MBEDTLS_ERR_CIPHER_AUTH_FAILED );
-
-        return( 0 );
-    }
-#endif /* MBEDTLS_GCM_C */
-
-#if defined(MBEDTLS_CHACHAPOLY_C)
-    if ( MBEDTLS_CIPHER_CHACHA20_POLY1305 == ctx->cipher_info->type )
-    {
-        /* Don't allow truncated MAC for Poly1305 */
-        if ( tag_len != sizeof( check_tag ) )
-            return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-        ret = mbedtls_chachapoly_finish(
-            (mbedtls_chachapoly_context*) ctx->cipher_ctx, check_tag );
-        if ( ret != 0 )
-        {
-            return( ret );
-        }
-
-        /* Check the tag in "constant-time" */
-        if( mbedtls_constant_time_memcmp( tag, check_tag, tag_len ) != 0 )
-            return( MBEDTLS_ERR_CIPHER_AUTH_FAILED );
-
-        return( 0 );
-    }
-#endif /* MBEDTLS_CHACHAPOLY_C */
-
-    return( 0 );
-}
-#endif /* MBEDTLS_GCM_C || MBEDTLS_CHACHAPOLY_C */
-
-/*
- * Packet-oriented wrapper for non-AEAD modes
- */
-int mbedtls_cipher_crypt( mbedtls_cipher_context_t *ctx,
-                  const unsigned char *iv, size_t iv_len,
-                  const unsigned char *input, size_t ilen,
-                  unsigned char *output, size_t *olen )
-{
-    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-    size_t finish_olen;
-
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    CIPHER_VALIDATE_RET( iv_len == 0 || iv != NULL );
-    CIPHER_VALIDATE_RET( ilen == 0 || input != NULL );
-    CIPHER_VALIDATE_RET( output != NULL );
-    CIPHER_VALIDATE_RET( olen != NULL );
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
-        /* As in the non-PSA case, we don't check that
-         * a key has been set. If not, the key slot will
-         * still be in its default state of 0, which is
-         * guaranteed to be invalid, hence the PSA-call
-         * below will gracefully fail. */
-        mbedtls_cipher_context_psa * const cipher_psa =
-            (mbedtls_cipher_context_psa *) ctx->cipher_ctx;
-
-        psa_status_t status;
-        psa_cipher_operation_t cipher_op = PSA_CIPHER_OPERATION_INIT;
-        size_t part_len;
-
-        if( ctx->operation == MBEDTLS_DECRYPT )
-        {
-            status = psa_cipher_decrypt_setup( &cipher_op,
-                                               cipher_psa->slot,
-                                               cipher_psa->alg );
-        }
-        else if( ctx->operation == MBEDTLS_ENCRYPT )
-        {
-            status = psa_cipher_encrypt_setup( &cipher_op,
-                                               cipher_psa->slot,
-                                               cipher_psa->alg );
-        }
-        else
-            return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-        /* In the following, we can immediately return on an error,
-         * because the PSA Crypto API guarantees that cipher operations
-         * are terminated by unsuccessful calls to psa_cipher_update(),
-         * and by any call to psa_cipher_finish(). */
-        if( status != PSA_SUCCESS )
-            return( MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED );
-
-        status = psa_cipher_set_iv( &cipher_op, iv, iv_len );
-        if( status != PSA_SUCCESS )
-            return( MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED );
-
-        status = psa_cipher_update( &cipher_op,
-                                    input, ilen,
-                                    output, ilen, olen );
-        if( status != PSA_SUCCESS )
-            return( MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED );
-
-        status = psa_cipher_finish( &cipher_op,
-                                    output + *olen, ilen - *olen,
-                                    &part_len );
-        if( status != PSA_SUCCESS )
-            return( MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED );
-
-        *olen += part_len;
-        return( 0 );
-    }
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
-    if( ( ret = mbedtls_cipher_set_iv( ctx, iv, iv_len ) ) != 0 )
-        return( ret );
-
-    if( ( ret = mbedtls_cipher_reset( ctx ) ) != 0 )
-        return( ret );
-
-    if( ( ret = mbedtls_cipher_update( ctx, input, ilen,
-                                       output, olen ) ) != 0 )
-        return( ret );
-
-    if( ( ret = mbedtls_cipher_finish( ctx, output + *olen,
-                                       &finish_olen ) ) != 0 )
-        return( ret );
-
-    *olen += finish_olen;
-
-    return( 0 );
-}
-
-#if defined(MBEDTLS_CIPHER_MODE_AEAD)
-/*
- * Packet-oriented encryption for AEAD modes: internal function shared by
- * mbedtls_cipher_auth_encrypt() and mbedtls_cipher_auth_encrypt_ext().
- */
-static int mbedtls_cipher_aead_encrypt( mbedtls_cipher_context_t *ctx,
-                         const unsigned char *iv, size_t iv_len,
-                         const unsigned char *ad, size_t ad_len,
-                         const unsigned char *input, size_t ilen,
-                         unsigned char *output, size_t *olen,
-                         unsigned char *tag, size_t tag_len )
-{
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
-        /* As in the non-PSA case, we don't check that
-         * a key has been set. If not, the key slot will
-         * still be in its default state of 0, which is
-         * guaranteed to be invalid, hence the PSA-call
-         * below will gracefully fail. */
-        mbedtls_cipher_context_psa * const cipher_psa =
-            (mbedtls_cipher_context_psa *) ctx->cipher_ctx;
-
-        psa_status_t status;
-
-        /* PSA Crypto API always writes the authentication tag
-         * at the end of the encrypted message. */
-        if( output == NULL || tag != output + ilen )
-            return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
-
-        status = psa_aead_encrypt( cipher_psa->slot,
-                                   cipher_psa->alg,
-                                   iv, iv_len,
-                                   ad, ad_len,
-                                   input, ilen,
-                                   output, ilen + tag_len, olen );
-        if( status != PSA_SUCCESS )
-            return( MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED );
-
-        *olen -= tag_len;
-        return( 0 );
-    }
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
-#if defined(MBEDTLS_GCM_C)
-    if( MBEDTLS_MODE_GCM == ctx->cipher_info->mode )
-    {
-        *olen = ilen;
-        return( mbedtls_gcm_crypt_and_tag( ctx->cipher_ctx, MBEDTLS_GCM_ENCRYPT,
-                                           ilen, iv, iv_len, ad, ad_len,
-                                           input, output, tag_len, tag ) );
-    }
-#endif /* MBEDTLS_GCM_C */
-#if defined(MBEDTLS_CCM_C)
-    if( MBEDTLS_MODE_CCM == ctx->cipher_info->mode )
-    {
-        *olen = ilen;
-        return( mbedtls_ccm_encrypt_and_tag( ctx->cipher_ctx, ilen,
-                                     iv, iv_len, ad, ad_len, input, output,
-                                     tag, tag_len ) );
-    }
-#endif /* MBEDTLS_CCM_C */
-#if defined(MBEDTLS_CHACHAPOLY_C)
-    if ( MBEDTLS_CIPHER_CHACHA20_POLY1305 == ctx->cipher_info->type )
-    {
-        /* ChachaPoly has fixed length nonce and MAC (tag) */
-        if ( ( iv_len != ctx->cipher_info->iv_size ) ||
-             ( tag_len != 16U ) )
-        {
-            return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-        }
-
-        *olen = ilen;
-        return( mbedtls_chachapoly_encrypt_and_tag( ctx->cipher_ctx,
-                                ilen, iv, ad, ad_len, input, output, tag ) );
-    }
-#endif /* MBEDTLS_CHACHAPOLY_C */
-
-    return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
-}
-
-/*
- * Packet-oriented encryption for AEAD modes: internal function shared by
- * mbedtls_cipher_auth_encrypt() and mbedtls_cipher_auth_encrypt_ext().
- */
-static int mbedtls_cipher_aead_decrypt( mbedtls_cipher_context_t *ctx,
-                         const unsigned char *iv, size_t iv_len,
-                         const unsigned char *ad, size_t ad_len,
-                         const unsigned char *input, size_t ilen,
-                         unsigned char *output, size_t *olen,
-                         const unsigned char *tag, size_t tag_len )
-{
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-    if( ctx->psa_enabled == 1 )
-    {
-        /* As in the non-PSA case, we don't check that
-         * a key has been set. If not, the key slot will
-         * still be in its default state of 0, which is
-         * guaranteed to be invalid, hence the PSA-call
-         * below will gracefully fail. */
-        mbedtls_cipher_context_psa * const cipher_psa =
-            (mbedtls_cipher_context_psa *) ctx->cipher_ctx;
-
-        psa_status_t status;
-
-        /* PSA Crypto API always writes the authentication tag
-         * at the end of the encrypted message. */
-        if( input == NULL || tag != input + ilen )
-            return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
-
-        status = psa_aead_decrypt( cipher_psa->slot,
-                                   cipher_psa->alg,
-                                   iv, iv_len,
-                                   ad, ad_len,
-                                   input, ilen + tag_len,
-                                   output, ilen, olen );
-        if( status == PSA_ERROR_INVALID_SIGNATURE )
-            return( MBEDTLS_ERR_CIPHER_AUTH_FAILED );
-        else if( status != PSA_SUCCESS )
-            return( MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED );
-
-        return( 0 );
-    }
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
-#if defined(MBEDTLS_GCM_C)
-    if( MBEDTLS_MODE_GCM == ctx->cipher_info->mode )
-    {
-        int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
-        *olen = ilen;
-        ret = mbedtls_gcm_auth_decrypt( ctx->cipher_ctx, ilen,
-                                iv, iv_len, ad, ad_len,
-                                tag, tag_len, input, output );
-
-        if( ret == MBEDTLS_ERR_GCM_AUTH_FAILED )
-            ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED;
-
-        return( ret );
-    }
-#endif /* MBEDTLS_GCM_C */
-#if defined(MBEDTLS_CCM_C)
-    if( MBEDTLS_MODE_CCM == ctx->cipher_info->mode )
-    {
-        int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
-        *olen = ilen;
-        ret = mbedtls_ccm_auth_decrypt( ctx->cipher_ctx, ilen,
-                                iv, iv_len, ad, ad_len,
-                                input, output, tag, tag_len );
-
-        if( ret == MBEDTLS_ERR_CCM_AUTH_FAILED )
-            ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED;
-
-        return( ret );
-    }
-#endif /* MBEDTLS_CCM_C */
-#if defined(MBEDTLS_CHACHAPOLY_C)
-    if ( MBEDTLS_CIPHER_CHACHA20_POLY1305 == ctx->cipher_info->type )
-    {
-        int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
-        /* ChachaPoly has fixed length nonce and MAC (tag) */
-        if ( ( iv_len != ctx->cipher_info->iv_size ) ||
-             ( tag_len != 16U ) )
-        {
-            return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-        }
-
-        *olen = ilen;
-        ret = mbedtls_chachapoly_auth_decrypt( ctx->cipher_ctx, ilen,
-                                iv, ad, ad_len, tag, input, output );
-
-        if( ret == MBEDTLS_ERR_CHACHAPOLY_AUTH_FAILED )
-            ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED;
-
-        return( ret );
-    }
-#endif /* MBEDTLS_CHACHAPOLY_C */
-
-    return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
-}
-
-#if !defined(MBEDTLS_DEPRECATED_REMOVED)
-/*
- * Packet-oriented encryption for AEAD modes: public legacy function.
- */
-int mbedtls_cipher_auth_encrypt( mbedtls_cipher_context_t *ctx,
-                         const unsigned char *iv, size_t iv_len,
-                         const unsigned char *ad, size_t ad_len,
-                         const unsigned char *input, size_t ilen,
-                         unsigned char *output, size_t *olen,
-                         unsigned char *tag, size_t tag_len )
-{
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    CIPHER_VALIDATE_RET( iv_len == 0 || iv != NULL );
-    CIPHER_VALIDATE_RET( ad_len == 0 || ad != NULL );
-    CIPHER_VALIDATE_RET( ilen == 0 || input != NULL );
-    CIPHER_VALIDATE_RET( ilen == 0 || output != NULL );
-    CIPHER_VALIDATE_RET( olen != NULL );
-    CIPHER_VALIDATE_RET( tag_len == 0 || tag != NULL );
-
-    return( mbedtls_cipher_aead_encrypt( ctx, iv, iv_len, ad, ad_len,
-                                         input, ilen, output, olen,
-                                         tag, tag_len ) );
-}
-
-/*
- * Packet-oriented decryption for AEAD modes: public legacy function.
- */
-int mbedtls_cipher_auth_decrypt( mbedtls_cipher_context_t *ctx,
-                         const unsigned char *iv, size_t iv_len,
-                         const unsigned char *ad, size_t ad_len,
-                         const unsigned char *input, size_t ilen,
-                         unsigned char *output, size_t *olen,
-                         const unsigned char *tag, size_t tag_len )
-{
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    CIPHER_VALIDATE_RET( iv_len == 0 || iv != NULL );
-    CIPHER_VALIDATE_RET( ad_len == 0 || ad != NULL );
-    CIPHER_VALIDATE_RET( ilen == 0 || input != NULL );
-    CIPHER_VALIDATE_RET( ilen == 0 || output != NULL );
-    CIPHER_VALIDATE_RET( olen != NULL );
-    CIPHER_VALIDATE_RET( tag_len == 0 || tag != NULL );
-
-    return( mbedtls_cipher_aead_decrypt( ctx, iv, iv_len, ad, ad_len,
-                                         input, ilen, output, olen,
-                                         tag, tag_len ) );
-}
-#endif /* !MBEDTLS_DEPRECATED_REMOVED */
-#endif /* MBEDTLS_CIPHER_MODE_AEAD */
-
-#if defined(MBEDTLS_CIPHER_MODE_AEAD) || defined(MBEDTLS_NIST_KW_C)
-/*
- * Packet-oriented encryption for AEAD/NIST_KW: public function.
- */
-int mbedtls_cipher_auth_encrypt_ext( mbedtls_cipher_context_t *ctx,
-                         const unsigned char *iv, size_t iv_len,
-                         const unsigned char *ad, size_t ad_len,
-                         const unsigned char *input, size_t ilen,
-                         unsigned char *output, size_t output_len,
-                         size_t *olen, size_t tag_len )
-{
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    CIPHER_VALIDATE_RET( iv_len == 0 || iv != NULL );
-    CIPHER_VALIDATE_RET( ad_len == 0 || ad != NULL );
-    CIPHER_VALIDATE_RET( ilen == 0 || input != NULL );
-    CIPHER_VALIDATE_RET( output != NULL );
-    CIPHER_VALIDATE_RET( olen != NULL );
-
-#if defined(MBEDTLS_NIST_KW_C)
-    if(
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-        ctx->psa_enabled == 0 &&
-#endif
-        ( MBEDTLS_MODE_KW == ctx->cipher_info->mode ||
-          MBEDTLS_MODE_KWP == ctx->cipher_info->mode ) )
-    {
-        mbedtls_nist_kw_mode_t mode = ( MBEDTLS_MODE_KW == ctx->cipher_info->mode ) ?
-                                        MBEDTLS_KW_MODE_KW : MBEDTLS_KW_MODE_KWP;
-
-        /* There is no iv, tag or ad associated with KW and KWP,
-         * so these length should be 0 as documented. */
-        if( iv_len != 0 || tag_len != 0 || ad_len != 0 )
-            return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-        (void) iv;
-        (void) ad;
-
-        return( mbedtls_nist_kw_wrap( ctx->cipher_ctx, mode, input, ilen,
-                                      output, olen, output_len ) );
-    }
-#endif /* MBEDTLS_NIST_KW_C */
-
-#if defined(MBEDTLS_CIPHER_MODE_AEAD)
-    /* AEAD case: check length before passing on to shared function */
-    if( output_len < ilen + tag_len )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-    int ret = mbedtls_cipher_aead_encrypt( ctx, iv, iv_len, ad, ad_len,
-                                       input, ilen, output, olen,
-                                       output + ilen, tag_len );
-    *olen += tag_len;
-    return( ret );
-#else
-    return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
-#endif /* MBEDTLS_CIPHER_MODE_AEAD */
-}
-
-/*
- * Packet-oriented decryption for AEAD/NIST_KW: public function.
- */
-int mbedtls_cipher_auth_decrypt_ext( mbedtls_cipher_context_t *ctx,
-                         const unsigned char *iv, size_t iv_len,
-                         const unsigned char *ad, size_t ad_len,
-                         const unsigned char *input, size_t ilen,
-                         unsigned char *output, size_t output_len,
-                         size_t *olen, size_t tag_len )
-{
-    CIPHER_VALIDATE_RET( ctx != NULL );
-    CIPHER_VALIDATE_RET( iv_len == 0 || iv != NULL );
-    CIPHER_VALIDATE_RET( ad_len == 0 || ad != NULL );
-    CIPHER_VALIDATE_RET( ilen == 0 || input != NULL );
-    CIPHER_VALIDATE_RET( output_len == 0 || output != NULL );
-    CIPHER_VALIDATE_RET( olen != NULL );
-
-#if defined(MBEDTLS_NIST_KW_C)
-    if(
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-        ctx->psa_enabled == 0 &&
-#endif
-        ( MBEDTLS_MODE_KW == ctx->cipher_info->mode ||
-          MBEDTLS_MODE_KWP == ctx->cipher_info->mode ) )
-    {
-        mbedtls_nist_kw_mode_t mode = ( MBEDTLS_MODE_KW == ctx->cipher_info->mode ) ?
-                                        MBEDTLS_KW_MODE_KW : MBEDTLS_KW_MODE_KWP;
-
-        /* There is no iv, tag or ad associated with KW and KWP,
-         * so these length should be 0 as documented. */
-        if( iv_len != 0 || tag_len != 0 || ad_len != 0 )
-            return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-        (void) iv;
-        (void) ad;
-
-        return( mbedtls_nist_kw_unwrap( ctx->cipher_ctx, mode, input, ilen,
-                                        output, olen, output_len ) );
-    }
-#endif /* MBEDTLS_NIST_KW_C */
-
-#if defined(MBEDTLS_CIPHER_MODE_AEAD)
-    /* AEAD case: check length before passing on to shared function */
-    if( ilen < tag_len || output_len < ilen - tag_len )
-        return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
-
-    return( mbedtls_cipher_aead_decrypt( ctx, iv, iv_len, ad, ad_len,
-                                         input, ilen - tag_len, output, olen,
-                                         input + ilen - tag_len, tag_len ) );
-#else
-    return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
-#endif /* MBEDTLS_CIPHER_MODE_AEAD */
-}
-#endif /* MBEDTLS_CIPHER_MODE_AEAD || MBEDTLS_NIST_KW_C */
-
-#endif /* MBEDTLS_CIPHER_C */