1 2 /* 3 * Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved. 4 * 5 * Licensed under the Apache License 2.0 (the "License"). You may not use 6 * this file except in compliance with the License. You can obtain a copy 7 * in the file LICENSE in the source distribution or at 8 * https://www.openssl.org/source/license.html 9 */ 10 11 #include <openssl/aes.h> 12 #include "ciphercommon_aead.h" 13 14 typedef struct prov_gcm_hw_st PROV_GCM_HW; 15 16 #define GCM_IV_DEFAULT_SIZE 12 /* IV's for AES_GCM should normally be 12 bytes */ 17 #define GCM_IV_MAX_SIZE (1024 / 8) 18 #define GCM_TAG_MAX_SIZE 16 19 20 #if defined(OPENSSL_CPUID_OBJ) && defined(__s390__) 21 /*- 22 * KMA-GCM-AES parameter block - begin 23 * (see z/Architecture Principles of Operation >= SA22-7832-11) 24 */ 25 typedef struct S390X_kma_params_st { 26 unsigned char reserved[12]; 27 union { 28 unsigned int w; 29 unsigned char b[4]; 30 } cv; /* 32 bit counter value */ 31 union { 32 unsigned long long g[2]; 33 unsigned char b[16]; 34 } t; /* tag */ 35 unsigned char h[16]; /* hash subkey */ 36 unsigned long long taadl; /* total AAD length */ 37 unsigned long long tpcl; /* total plaintxt/ciphertxt len */ 38 union { 39 unsigned long long g[2]; 40 unsigned int w[4]; 41 } j0; /* initial counter value */ 42 unsigned char k[32]; /* key */ 43 } S390X_KMA_PARAMS; 44 45 #endif 46 47 typedef struct prov_gcm_ctx_st { 48 unsigned int mode; /* The mode that we are using */ 49 size_t keylen; 50 size_t ivlen; 51 size_t taglen; 52 size_t tls_aad_pad_sz; 53 size_t tls_aad_len; /* TLS AAD length */ 54 uint64_t tls_enc_records; /* Number of TLS records encrypted */ 55 56 /* 57 * num contains the number of bytes of |iv| which are valid for modes that 58 * manage partial blocks themselves. 59 */ 60 size_t num; 61 size_t bufsz; /* Number of bytes in buf */ 62 uint64_t flags; 63 64 unsigned int iv_state; /* set to one of IV_STATE_XXX */ 65 unsigned int enc:1; /* Set to 1 if we are encrypting or 0 otherwise */ 66 unsigned int pad:1; /* Whether padding should be used or not */ 67 unsigned int key_set:1; /* Set if key initialised */ 68 unsigned int iv_gen_rand:1; /* No IV was specified, so generate a rand IV */ 69 unsigned int iv_gen:1; /* It is OK to generate IVs */ 70 71 unsigned char iv[GCM_IV_MAX_SIZE]; /* Buffer to use for IV's */ 72 unsigned char buf[AES_BLOCK_SIZE]; /* Buffer of partial blocks processed via update calls */ 73 74 OSSL_LIB_CTX *libctx; /* needed for rand calls */ 75 const PROV_GCM_HW *hw; /* hardware specific methods */ 76 GCM128_CONTEXT gcm; 77 ctr128_f ctr; 78 const void *ks; 79 } PROV_GCM_CTX; 80 81 PROV_CIPHER_FUNC(int, GCM_setkey, (PROV_GCM_CTX *ctx, const unsigned char *key, 82 size_t keylen)); 83 PROV_CIPHER_FUNC(int, GCM_setiv, (PROV_GCM_CTX *dat, const unsigned char *iv, 84 size_t ivlen)); 85 PROV_CIPHER_FUNC(int, GCM_aadupdate, (PROV_GCM_CTX *ctx, 86 const unsigned char *aad, size_t aadlen)); 87 PROV_CIPHER_FUNC(int, GCM_cipherupdate, (PROV_GCM_CTX *ctx, 88 const unsigned char *in, size_t len, 89 unsigned char *out)); 90 PROV_CIPHER_FUNC(int, GCM_cipherfinal, (PROV_GCM_CTX *ctx, unsigned char *tag)); 91 PROV_CIPHER_FUNC(int, GCM_oneshot, (PROV_GCM_CTX *ctx, unsigned char *aad, 92 size_t aad_len, const unsigned char *in, 93 size_t in_len, unsigned char *out, 94 unsigned char *tag, size_t taglen)); 95 struct prov_gcm_hw_st { 96 OSSL_GCM_setkey_fn setkey; 97 OSSL_GCM_setiv_fn setiv; 98 OSSL_GCM_aadupdate_fn aadupdate; 99 OSSL_GCM_cipherupdate_fn cipherupdate; 100 OSSL_GCM_cipherfinal_fn cipherfinal; 101 OSSL_GCM_oneshot_fn oneshot; 102 }; 103 104 OSSL_FUNC_cipher_encrypt_init_fn ossl_gcm_einit; 105 OSSL_FUNC_cipher_decrypt_init_fn ossl_gcm_dinit; 106 OSSL_FUNC_cipher_get_ctx_params_fn ossl_gcm_get_ctx_params; 107 OSSL_FUNC_cipher_set_ctx_params_fn ossl_gcm_set_ctx_params; 108 OSSL_FUNC_cipher_cipher_fn ossl_gcm_cipher; 109 OSSL_FUNC_cipher_update_fn ossl_gcm_stream_update; 110 OSSL_FUNC_cipher_final_fn ossl_gcm_stream_final; 111 void ossl_gcm_initctx(void *provctx, PROV_GCM_CTX *ctx, size_t keybits, 112 const PROV_GCM_HW *hw); 113 114 int ossl_gcm_setiv(PROV_GCM_CTX *ctx, const unsigned char *iv, size_t ivlen); 115 int ossl_gcm_aad_update(PROV_GCM_CTX *ctx, const unsigned char *aad, 116 size_t aad_len); 117 int ossl_gcm_cipher_final(PROV_GCM_CTX *ctx, unsigned char *tag); 118 int ossl_gcm_one_shot(PROV_GCM_CTX *ctx, unsigned char *aad, size_t aad_len, 119 const unsigned char *in, size_t in_len, 120 unsigned char *out, unsigned char *tag, size_t tag_len); 121 int ossl_gcm_cipher_update(PROV_GCM_CTX *ctx, const unsigned char *in, 122 size_t len, unsigned char *out); 123 124 #define GCM_HW_SET_KEY_CTR_FN(ks, fn_set_enc_key, fn_block, fn_ctr) \ 125 ctx->ks = ks; \ 126 fn_set_enc_key(key, keylen * 8, ks); \ 127 CRYPTO_gcm128_init(&ctx->gcm, ks, (block128_f)fn_block); \ 128 ctx->ctr = (ctr128_f)fn_ctr; \ 129 ctx->key_set = 1; 130
Indexes created Sat Feb 28 05:31:39 UTC 2026