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       1                 :            : /*
       2                 :            :  * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
       3                 :            :  *
       4                 :            :  * Licensed under the Apache License, Version 2.0 (the "License").
       5                 :            :  * You may not use this file except in compliance with the License.
       6                 :            :  * A copy of the License is located at
       7                 :            :  *
       8                 :            :  *  http://aws.amazon.com/apache2.0
       9                 :            :  *
      10                 :            :  * or in the "license" file accompanying this file. This file is distributed
      11                 :            :  * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
      12                 :            :  * express or implied. See the License for the specific language governing
      13                 :            :  * permissions and limitations under the License.
      14                 :            :  */
      15                 :            : 
      16                 :            : #include "tls/s2n_handshake_hashes.h"
      17                 :            : 
      18                 :            : #include "crypto/s2n_fips.h"
      19                 :            : #include "tls/s2n_connection.h"
      20                 :            : #include "utils/s2n_blob.h"
      21                 :            : #include "utils/s2n_mem.h"
      22                 :            : #include "utils/s2n_safety.h"
      23                 :            : 
      24                 :            : static S2N_RESULT s2n_handshake_hashes_new_hashes(struct s2n_handshake_hashes *hashes)
      25                 :     125496 : {
      26 [ -  + ][ #  # ]:     125496 :     RESULT_ENSURE_REF(hashes);
      27         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_hash_new(&hashes->md5));
      28         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_hash_new(&hashes->sha1));
      29         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_hash_new(&hashes->sha224));
      30         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_hash_new(&hashes->sha256));
      31         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_hash_new(&hashes->sha384));
      32         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_hash_new(&hashes->sha512));
      33         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_hash_new(&hashes->md5_sha1));
      34         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_hash_new(&hashes->hash_workspace));
      35                 :     125496 :     return S2N_RESULT_OK;
      36                 :     125496 : }
      37                 :            : 
      38                 :            : static S2N_RESULT s2n_handshake_hashes_reset_hashes(struct s2n_handshake_hashes *hashes)
      39                 :    3420594 : {
      40 [ +  + ][ +  - ]:    3420594 :     RESULT_ENSURE_REF(hashes);
      41         [ -  + ]:    3420593 :     RESULT_GUARD_POSIX(s2n_hash_reset(&hashes->md5));
      42         [ -  + ]:    3420593 :     RESULT_GUARD_POSIX(s2n_hash_reset(&hashes->sha1));
      43         [ -  + ]:    3420593 :     RESULT_GUARD_POSIX(s2n_hash_reset(&hashes->sha224));
      44         [ -  + ]:    3420593 :     RESULT_GUARD_POSIX(s2n_hash_reset(&hashes->sha256));
      45         [ -  + ]:    3420593 :     RESULT_GUARD_POSIX(s2n_hash_reset(&hashes->sha384));
      46         [ -  + ]:    3420593 :     RESULT_GUARD_POSIX(s2n_hash_reset(&hashes->sha512));
      47         [ -  + ]:    3420593 :     RESULT_GUARD_POSIX(s2n_hash_reset(&hashes->md5_sha1));
      48         [ -  + ]:    3420593 :     RESULT_GUARD_POSIX(s2n_hash_reset(&hashes->hash_workspace));
      49                 :    3420593 :     return S2N_RESULT_OK;
      50                 :    3420593 : }
      51                 :            : 
      52                 :            : static S2N_RESULT s2n_handshake_hashes_free_hashes(struct s2n_handshake_hashes *hashes)
      53                 :     125522 : {
      54         [ +  + ]:     125522 :     if (!hashes) {
      55                 :         26 :         return S2N_RESULT_OK;
      56                 :         26 :     }
      57         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_hash_free(&hashes->md5));
      58         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_hash_free(&hashes->sha1));
      59         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_hash_free(&hashes->sha224));
      60         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_hash_free(&hashes->sha256));
      61         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_hash_free(&hashes->sha384));
      62         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_hash_free(&hashes->sha512));
      63         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_hash_free(&hashes->md5_sha1));
      64         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_hash_free(&hashes->hash_workspace));
      65                 :     125496 :     return S2N_RESULT_OK;
      66                 :     125496 : }
      67                 :            : 
      68                 :            : static S2N_RESULT s2n_handshake_hashes_init_hashes(struct s2n_handshake_hashes *hashes)
      69                 :     125496 : {
      70         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_hash_init(&hashes->md5, S2N_HASH_MD5));
      71         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_hash_init(&hashes->sha1, S2N_HASH_SHA1));
      72         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_hash_init(&hashes->sha224, S2N_HASH_SHA224));
      73         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_hash_init(&hashes->sha256, S2N_HASH_SHA256));
      74         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_hash_init(&hashes->sha384, S2N_HASH_SHA384));
      75         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_hash_init(&hashes->sha512, S2N_HASH_SHA512));
      76         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_hash_init(&hashes->md5_sha1, S2N_HASH_MD5_SHA1));
      77         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_hash_init(&hashes->hash_workspace, S2N_HASH_NONE));
      78                 :            : 
      79                 :     125496 :     return S2N_RESULT_OK;
      80                 :     125496 : }
      81                 :            : 
      82                 :            : S2N_RESULT s2n_handshake_hashes_new(struct s2n_handshake_hashes **hashes)
      83                 :     125497 : {
      84 [ +  + ][ +  - ]:     125497 :     RESULT_ENSURE_REF(hashes);
      85 [ -  + ][ #  # ]:     125496 :     RESULT_ENSURE_EQ(*hashes, NULL);
      86                 :            : 
      87                 :     125496 :     DEFER_CLEANUP(struct s2n_blob data = { 0 }, s2n_free);
      88         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_realloc(&data, sizeof(struct s2n_handshake_hashes)));
      89         [ -  + ]:     125496 :     RESULT_GUARD_POSIX(s2n_blob_zero(&data));
      90                 :     125496 :     *hashes = (struct s2n_handshake_hashes *) (void *) data.data;
      91                 :     125496 :     ZERO_TO_DISABLE_DEFER_CLEANUP(data);
      92                 :            : 
      93         [ -  + ]:     125496 :     RESULT_GUARD(s2n_handshake_hashes_new_hashes(*hashes));
      94         [ -  + ]:     125496 :     RESULT_GUARD(s2n_handshake_hashes_init_hashes(*hashes));
      95                 :            : 
      96                 :     125496 :     return S2N_RESULT_OK;
      97                 :     125496 : }
      98                 :            : 
      99                 :            : S2N_RESULT s2n_handshake_hashes_wipe(struct s2n_handshake_hashes *hashes)
     100                 :    3420594 : {
     101         [ +  + ]:    3420594 :     RESULT_GUARD(s2n_handshake_hashes_reset_hashes(hashes));
     102                 :    3420593 :     return S2N_RESULT_OK;
     103                 :    3420594 : }
     104                 :            : 
     105                 :            : S2N_CLEANUP_RESULT s2n_handshake_hashes_free(struct s2n_handshake_hashes **hashes)
     106                 :     125523 : {
     107 [ +  + ][ +  - ]:     125523 :     RESULT_ENSURE_REF(hashes);
     108         [ -  + ]:     125522 :     RESULT_GUARD(s2n_handshake_hashes_free_hashes(*hashes));
     109         [ -  + ]:     125522 :     RESULT_GUARD_POSIX(s2n_free_object((uint8_t **) hashes, sizeof(struct s2n_handshake_hashes)));
     110                 :     125522 :     return S2N_RESULT_OK;
     111                 :     125522 : }