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      1 /*
      2  * Copyright 2019-2023 The OpenSSL Project Authors. All Rights Reserved.
      3  *
      4  * Licensed under the Apache License 2.0 (the "License").  You may not use
      5  * this file except in compliance with the License.  You can obtain a copy
      6  * in the file LICENSE in the source distribution or at
      7  * https://www.openssl.org/source/license.html
      8  */
      9 
     10 /* AES CCM mode */
     11 
     12 /*
     13  * This file uses the low level AES functions (which are deprecated for
     14  * non-internal use) in order to implement provider AES ciphers.
     15  */
     16 #include "internal/deprecated.h"
     17 
     18 #include "cipher_aes_ccm.h"
     19 
     20 #define AES_HW_CCM_SET_KEY_FN(fn_set_enc_key, fn_blk, fn_ccm_enc, fn_ccm_dec) \
     21     fn_set_enc_key(key, keylen * 8, &actx->ccm.ks.ks);                        \
     22     CRYPTO_ccm128_init(&ctx->ccm_ctx, ctx->m, ctx->l, &actx->ccm.ks.ks,       \
     23         (block128_f)fn_blk);                                                  \
     24     ctx->str = ctx->enc ? (ccm128_f)fn_ccm_enc : (ccm128_f)fn_ccm_dec;        \
     25     ctx->key_set = 1;
     26 
     27 static int ccm_generic_aes_initkey(PROV_CCM_CTX *ctx, const unsigned char *key,
     28     size_t keylen)
     29 {
     30     PROV_AES_CCM_CTX *actx = (PROV_AES_CCM_CTX *)ctx;
     31 
     32 #ifdef HWAES_CAPABLE
     33     if (HWAES_CAPABLE) {
     34         AES_HW_CCM_SET_KEY_FN(HWAES_set_encrypt_key, HWAES_encrypt, NULL, NULL);
     35     } else
     36 #endif /* HWAES_CAPABLE */
     37 
     38 #ifdef VPAES_CAPABLE
     39         if (VPAES_CAPABLE) {
     40         AES_HW_CCM_SET_KEY_FN(vpaes_set_encrypt_key, vpaes_encrypt, NULL, NULL);
     41     } else
     42 #endif
     43     {
     44         AES_HW_CCM_SET_KEY_FN(AES_set_encrypt_key, AES_encrypt, NULL, NULL)
     45     }
     46     return 1;
     47 }
     48 
     49 static const PROV_CCM_HW aes_ccm = {
     50     ccm_generic_aes_initkey,
     51     ossl_ccm_generic_setiv,
     52     ossl_ccm_generic_setaad,
     53     ossl_ccm_generic_auth_encrypt,
     54     ossl_ccm_generic_auth_decrypt,
     55     ossl_ccm_generic_gettag
     56 };
     57 
     58 #if defined(S390X_aes_128_CAPABLE)
     59 #include "cipher_aes_ccm_hw_s390x.inc"
     60 #elif defined(AESNI_CAPABLE)
     61 #include "cipher_aes_ccm_hw_aesni.inc"
     62 #elif defined(SPARC_AES_CAPABLE)
     63 #include "cipher_aes_ccm_hw_t4.inc"
     64 #elif defined(OPENSSL_CPUID_OBJ) && defined(__riscv) && __riscv_xlen == 64
     65 #include "cipher_aes_ccm_hw_rv64i.inc"
     66 #elif defined(OPENSSL_CPUID_OBJ) && defined(__riscv) && __riscv_xlen == 32
     67 #include "cipher_aes_ccm_hw_rv32i.inc"
     68 #else
     69 const PROV_CCM_HW *ossl_prov_aes_hw_ccm(size_t keybits)
     70 {
     71     return &aes_ccm;
     72 }
     73 #endif
     74