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Diffstat (limited to 'lib/mbedtls-2.27.0/library/psa_crypto_aead.c')
-rw-r--r--lib/mbedtls-2.27.0/library/psa_crypto_aead.c367
1 files changed, 0 insertions, 367 deletions
diff --git a/lib/mbedtls-2.27.0/library/psa_crypto_aead.c b/lib/mbedtls-2.27.0/library/psa_crypto_aead.c
deleted file mode 100644
index 356679c..0000000
--- a/lib/mbedtls-2.27.0/library/psa_crypto_aead.c
+++ /dev/null
@@ -1,367 +0,0 @@
-/*
- * PSA AEAD entry points
- */
-/*
- * 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_PSA_CRYPTO_C)
-
-#include "psa_crypto_aead.h"
-#include "psa_crypto_core.h"
-
-#include "mbedtls/ccm.h"
-#include "mbedtls/chachapoly.h"
-#include "mbedtls/cipher.h"
-#include "mbedtls/gcm.h"
-
-typedef struct
-{
- union
- {
- unsigned dummy; /* Make the union non-empty even with no supported algorithms. */
-#if defined(MBEDTLS_PSA_BUILTIN_ALG_CCM)
- mbedtls_ccm_context ccm;
-#endif /* MBEDTLS_PSA_BUILTIN_ALG_CCM */
-#if defined(MBEDTLS_PSA_BUILTIN_ALG_GCM)
- mbedtls_gcm_context gcm;
-#endif /* MBEDTLS_PSA_BUILTIN_ALG_GCM */
-#if defined(MBEDTLS_PSA_BUILTIN_ALG_CHACHA20_POLY1305)
- mbedtls_chachapoly_context chachapoly;
-#endif /* MBEDTLS_PSA_BUILTIN_ALG_CHACHA20_POLY1305 */
- } ctx;
- psa_algorithm_t core_alg;
- uint8_t tag_length;
-} aead_operation_t;
-
-#define AEAD_OPERATION_INIT {{0}, 0, 0}
-
-static void psa_aead_abort_internal( aead_operation_t *operation )
-{
- switch( operation->core_alg )
- {
-#if defined(MBEDTLS_PSA_BUILTIN_ALG_CCM)
- case PSA_ALG_CCM:
- mbedtls_ccm_free( &operation->ctx.ccm );
- break;
-#endif /* MBEDTLS_PSA_BUILTIN_ALG_CCM */
-#if defined(MBEDTLS_PSA_BUILTIN_ALG_GCM)
- case PSA_ALG_GCM:
- mbedtls_gcm_free( &operation->ctx.gcm );
- break;
-#endif /* MBEDTLS_PSA_BUILTIN_ALG_GCM */
-#if defined(MBEDTLS_PSA_BUILTIN_ALG_CHACHA20_POLY1305)
- case PSA_ALG_CHACHA20_POLY1305:
- mbedtls_chachapoly_free( &operation->ctx.chachapoly );
- break;
-#endif /* MBEDTLS_PSA_BUILTIN_ALG_CHACHA20_POLY1305 */
- }
-}
-
-static psa_status_t psa_aead_setup(
- aead_operation_t *operation,
- const psa_key_attributes_t *attributes,
- const uint8_t *key_buffer,
- psa_algorithm_t alg )
-{
- psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
- size_t key_bits;
- const mbedtls_cipher_info_t *cipher_info;
- mbedtls_cipher_id_t cipher_id;
- size_t full_tag_length = 0;
-
- key_bits = attributes->core.bits;
-
- cipher_info = mbedtls_cipher_info_from_psa( alg,
- attributes->core.type, key_bits,
- &cipher_id );
- if( cipher_info == NULL )
- return( PSA_ERROR_NOT_SUPPORTED );
-
- switch( PSA_ALG_AEAD_WITH_SHORTENED_TAG( alg, 0 ) )
- {
-#if defined(MBEDTLS_PSA_BUILTIN_ALG_CCM)
- case PSA_ALG_AEAD_WITH_SHORTENED_TAG( PSA_ALG_CCM, 0 ):
- operation->core_alg = PSA_ALG_CCM;
- full_tag_length = 16;
- /* CCM allows the following tag lengths: 4, 6, 8, 10, 12, 14, 16.
- * The call to mbedtls_ccm_encrypt_and_tag or
- * mbedtls_ccm_auth_decrypt will validate the tag length. */
- if( PSA_BLOCK_CIPHER_BLOCK_LENGTH( attributes->core.type ) != 16 )
- return( PSA_ERROR_INVALID_ARGUMENT );
-
- mbedtls_ccm_init( &operation->ctx.ccm );
- status = mbedtls_to_psa_error(
- mbedtls_ccm_setkey( &operation->ctx.ccm, cipher_id,
- key_buffer, (unsigned int) key_bits ) );
- if( status != PSA_SUCCESS )
- return( status );
- break;
-#endif /* MBEDTLS_PSA_BUILTIN_ALG_CCM */
-
-#if defined(MBEDTLS_PSA_BUILTIN_ALG_GCM)
- case PSA_ALG_AEAD_WITH_SHORTENED_TAG( PSA_ALG_GCM, 0 ):
- operation->core_alg = PSA_ALG_GCM;
- full_tag_length = 16;
- /* GCM allows the following tag lengths: 4, 8, 12, 13, 14, 15, 16.
- * The call to mbedtls_gcm_crypt_and_tag or
- * mbedtls_gcm_auth_decrypt will validate the tag length. */
- if( PSA_BLOCK_CIPHER_BLOCK_LENGTH( attributes->core.type ) != 16 )
- return( PSA_ERROR_INVALID_ARGUMENT );
-
- mbedtls_gcm_init( &operation->ctx.gcm );
- status = mbedtls_to_psa_error(
- mbedtls_gcm_setkey( &operation->ctx.gcm, cipher_id,
- key_buffer, (unsigned int) key_bits ) );
- if( status != PSA_SUCCESS )
- return( status );
- break;
-#endif /* MBEDTLS_PSA_BUILTIN_ALG_GCM */
-
-#if defined(MBEDTLS_PSA_BUILTIN_ALG_CHACHA20_POLY1305)
- case PSA_ALG_AEAD_WITH_SHORTENED_TAG( PSA_ALG_CHACHA20_POLY1305, 0 ):
- operation->core_alg = PSA_ALG_CHACHA20_POLY1305;
- full_tag_length = 16;
- /* We only support the default tag length. */
- if( alg != PSA_ALG_CHACHA20_POLY1305 )
- return( PSA_ERROR_NOT_SUPPORTED );
-
- mbedtls_chachapoly_init( &operation->ctx.chachapoly );
- status = mbedtls_to_psa_error(
- mbedtls_chachapoly_setkey( &operation->ctx.chachapoly,
- key_buffer ) );
- if( status != PSA_SUCCESS )
- return( status );
- break;
-#endif /* MBEDTLS_PSA_BUILTIN_ALG_CHACHA20_POLY1305 */
-
- default:
- return( PSA_ERROR_NOT_SUPPORTED );
- }
-
- if( PSA_AEAD_TAG_LENGTH( attributes->core.type,
- key_bits, alg )
- > full_tag_length )
- return( PSA_ERROR_INVALID_ARGUMENT );
-
- operation->tag_length = PSA_AEAD_TAG_LENGTH( attributes->core.type,
- key_bits,
- alg );
-
- return( PSA_SUCCESS );
-}
-
-psa_status_t mbedtls_psa_aead_encrypt(
- const psa_key_attributes_t *attributes,
- const uint8_t *key_buffer, size_t key_buffer_size,
- psa_algorithm_t alg,
- const uint8_t *nonce, size_t nonce_length,
- const uint8_t *additional_data, size_t additional_data_length,
- const uint8_t *plaintext, size_t plaintext_length,
- uint8_t *ciphertext, size_t ciphertext_size, size_t *ciphertext_length )
-{
- psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
- aead_operation_t operation = AEAD_OPERATION_INIT;
- uint8_t *tag;
- (void) key_buffer_size;
-
- status = psa_aead_setup( &operation, attributes, key_buffer, alg );
- if( status != PSA_SUCCESS )
- goto exit;
-
- /* For all currently supported modes, the tag is at the end of the
- * ciphertext. */
- if( ciphertext_size < ( plaintext_length + operation.tag_length ) )
- {
- status = PSA_ERROR_BUFFER_TOO_SMALL;
- goto exit;
- }
- tag = ciphertext + plaintext_length;
-
-#if defined(MBEDTLS_PSA_BUILTIN_ALG_CCM)
- if( operation.core_alg == PSA_ALG_CCM )
- {
- status = mbedtls_to_psa_error(
- mbedtls_ccm_encrypt_and_tag( &operation.ctx.ccm,
- plaintext_length,
- nonce, nonce_length,
- additional_data,
- additional_data_length,
- plaintext, ciphertext,
- tag, operation.tag_length ) );
- }
- else
-#endif /* MBEDTLS_PSA_BUILTIN_ALG_CCM */
-#if defined(MBEDTLS_PSA_BUILTIN_ALG_GCM)
- if( operation.core_alg == PSA_ALG_GCM )
- {
- status = mbedtls_to_psa_error(
- mbedtls_gcm_crypt_and_tag( &operation.ctx.gcm,
- MBEDTLS_GCM_ENCRYPT,
- plaintext_length,
- nonce, nonce_length,
- additional_data, additional_data_length,
- plaintext, ciphertext,
- operation.tag_length, tag ) );
- }
- else
-#endif /* MBEDTLS_PSA_BUILTIN_ALG_GCM */
-#if defined(MBEDTLS_PSA_BUILTIN_ALG_CHACHA20_POLY1305)
- if( operation.core_alg == PSA_ALG_CHACHA20_POLY1305 )
- {
- if( nonce_length != 12 || operation.tag_length != 16 )
- {
- status = PSA_ERROR_NOT_SUPPORTED;
- goto exit;
- }
- status = mbedtls_to_psa_error(
- mbedtls_chachapoly_encrypt_and_tag( &operation.ctx.chachapoly,
- plaintext_length,
- nonce,
- additional_data,
- additional_data_length,
- plaintext,
- ciphertext,
- tag ) );
- }
- else
-#endif /* MBEDTLS_PSA_BUILTIN_ALG_CHACHA20_POLY1305 */
- {
- (void) tag;
- return( PSA_ERROR_NOT_SUPPORTED );
- }
-
- if( status == PSA_SUCCESS )
- *ciphertext_length = plaintext_length + operation.tag_length;
-
-exit:
- psa_aead_abort_internal( &operation );
-
- return( status );
-}
-
-/* Locate the tag in a ciphertext buffer containing the encrypted data
- * followed by the tag. Return the length of the part preceding the tag in
- * *plaintext_length. This is the size of the plaintext in modes where
- * the encrypted data has the same size as the plaintext, such as
- * CCM and GCM. */
-static psa_status_t psa_aead_unpadded_locate_tag( size_t tag_length,
- const uint8_t *ciphertext,
- size_t ciphertext_length,
- size_t plaintext_size,
- const uint8_t **p_tag )
-{
- size_t payload_length;
- if( tag_length > ciphertext_length )
- return( PSA_ERROR_INVALID_ARGUMENT );
- payload_length = ciphertext_length - tag_length;
- if( payload_length > plaintext_size )
- return( PSA_ERROR_BUFFER_TOO_SMALL );
- *p_tag = ciphertext + payload_length;
- return( PSA_SUCCESS );
-}
-
-psa_status_t mbedtls_psa_aead_decrypt(
- const psa_key_attributes_t *attributes,
- const uint8_t *key_buffer, size_t key_buffer_size,
- psa_algorithm_t alg,
- const uint8_t *nonce, size_t nonce_length,
- const uint8_t *additional_data, size_t additional_data_length,
- const uint8_t *ciphertext, size_t ciphertext_length,
- uint8_t *plaintext, size_t plaintext_size, size_t *plaintext_length )
-{
- psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
- aead_operation_t operation = AEAD_OPERATION_INIT;
- const uint8_t *tag = NULL;
- (void) key_buffer_size;
-
- status = psa_aead_setup( &operation, attributes, key_buffer, alg );
- if( status != PSA_SUCCESS )
- goto exit;
-
- status = psa_aead_unpadded_locate_tag( operation.tag_length,
- ciphertext, ciphertext_length,
- plaintext_size, &tag );
- if( status != PSA_SUCCESS )
- goto exit;
-
-#if defined(MBEDTLS_PSA_BUILTIN_ALG_CCM)
- if( operation.core_alg == PSA_ALG_CCM )
- {
- status = mbedtls_to_psa_error(
- mbedtls_ccm_auth_decrypt( &operation.ctx.ccm,
- ciphertext_length - operation.tag_length,
- nonce, nonce_length,
- additional_data,
- additional_data_length,
- ciphertext, plaintext,
- tag, operation.tag_length ) );
- }
- else
-#endif /* MBEDTLS_PSA_BUILTIN_ALG_CCM */
-#if defined(MBEDTLS_PSA_BUILTIN_ALG_GCM)
- if( operation.core_alg == PSA_ALG_GCM )
- {
- status = mbedtls_to_psa_error(
- mbedtls_gcm_auth_decrypt( &operation.ctx.gcm,
- ciphertext_length - operation.tag_length,
- nonce, nonce_length,
- additional_data,
- additional_data_length,
- tag, operation.tag_length,
- ciphertext, plaintext ) );
- }
- else
-#endif /* MBEDTLS_PSA_BUILTIN_ALG_GCM */
-#if defined(MBEDTLS_PSA_BUILTIN_ALG_CHACHA20_POLY1305)
- if( operation.core_alg == PSA_ALG_CHACHA20_POLY1305 )
- {
- if( nonce_length != 12 || operation.tag_length != 16 )
- {
- status = PSA_ERROR_NOT_SUPPORTED;
- goto exit;
- }
- status = mbedtls_to_psa_error(
- mbedtls_chachapoly_auth_decrypt( &operation.ctx.chachapoly,
- ciphertext_length - operation.tag_length,
- nonce,
- additional_data,
- additional_data_length,
- tag,
- ciphertext,
- plaintext ) );
- }
- else
-#endif /* MBEDTLS_PSA_BUILTIN_ALG_CHACHA20_POLY1305 */
- {
- return( PSA_ERROR_NOT_SUPPORTED );
- }
-
- if( status == PSA_SUCCESS )
- *plaintext_length = ciphertext_length - operation.tag_length;
-
-exit:
- psa_aead_abort_internal( &operation );
-
- if( status == PSA_SUCCESS )
- *plaintext_length = ciphertext_length - operation.tag_length;
- return( status );
-}
-
-#endif /* MBEDTLS_PSA_CRYPTO_C */
-
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