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fecb3aae22
Reviewed-by: Tomas Mraz <tomas@openssl.org> Release: yes
136 lines
5.4 KiB
C
136 lines
5.4 KiB
C
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/*
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* Copyright 2019-2022 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#ifndef OSSL_PROV_CIPHERCOMMON_GCM_H
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# define OSSL_PROV_CIPHERCOMMON_GCM_H
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# pragma once
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# include <openssl/aes.h>
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# include "ciphercommon_aead.h"
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typedef struct prov_gcm_hw_st PROV_GCM_HW;
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# define GCM_IV_DEFAULT_SIZE 12 /* IV's for AES_GCM should normally be 12 bytes */
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# define GCM_IV_MAX_SIZE (1024 / 8)
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# define GCM_TAG_MAX_SIZE 16
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# if defined(OPENSSL_CPUID_OBJ) && defined(__s390__)
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/*-
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* KMA-GCM-AES parameter block - begin
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* (see z/Architecture Principles of Operation >= SA22-7832-11)
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*/
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typedef struct S390X_kma_params_st {
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unsigned char reserved[12];
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union {
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unsigned int w;
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unsigned char b[4];
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} cv; /* 32 bit counter value */
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union {
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unsigned long long g[2];
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unsigned char b[16];
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} t; /* tag */
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unsigned char h[16]; /* hash subkey */
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unsigned long long taadl; /* total AAD length */
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unsigned long long tpcl; /* total plaintxt/ciphertxt len */
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union {
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unsigned long long g[2];
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unsigned int w[4];
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} j0; /* initial counter value */
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unsigned char k[32]; /* key */
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} S390X_KMA_PARAMS;
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# endif
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typedef struct prov_gcm_ctx_st {
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unsigned int mode; /* The mode that we are using */
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size_t keylen;
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size_t ivlen;
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size_t taglen;
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size_t tls_aad_pad_sz;
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size_t tls_aad_len; /* TLS AAD length */
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uint64_t tls_enc_records; /* Number of TLS records encrypted */
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/*
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* num contains the number of bytes of |iv| which are valid for modes that
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* manage partial blocks themselves.
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*/
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size_t num;
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size_t bufsz; /* Number of bytes in buf */
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uint64_t flags;
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unsigned int iv_state; /* set to one of IV_STATE_XXX */
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unsigned int enc:1; /* Set to 1 if we are encrypting or 0 otherwise */
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unsigned int pad:1; /* Whether padding should be used or not */
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unsigned int key_set:1; /* Set if key initialised */
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unsigned int iv_gen_rand:1; /* No IV was specified, so generate a rand IV */
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unsigned int iv_gen:1; /* It is OK to generate IVs */
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unsigned char iv[GCM_IV_MAX_SIZE]; /* Buffer to use for IV's */
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unsigned char buf[AES_BLOCK_SIZE]; /* Buffer of partial blocks processed via update calls */
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OSSL_LIB_CTX *libctx; /* needed for rand calls */
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const PROV_GCM_HW *hw; /* hardware specific methods */
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GCM128_CONTEXT gcm;
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ctr128_f ctr;
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const void *ks;
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} PROV_GCM_CTX;
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PROV_CIPHER_FUNC(int, GCM_setkey, (PROV_GCM_CTX *ctx, const unsigned char *key,
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size_t keylen));
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PROV_CIPHER_FUNC(int, GCM_setiv, (PROV_GCM_CTX *dat, const unsigned char *iv,
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size_t ivlen));
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PROV_CIPHER_FUNC(int, GCM_aadupdate, (PROV_GCM_CTX *ctx,
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const unsigned char *aad, size_t aadlen));
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PROV_CIPHER_FUNC(int, GCM_cipherupdate, (PROV_GCM_CTX *ctx,
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const unsigned char *in, size_t len,
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unsigned char *out));
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PROV_CIPHER_FUNC(int, GCM_cipherfinal, (PROV_GCM_CTX *ctx, unsigned char *tag));
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PROV_CIPHER_FUNC(int, GCM_oneshot, (PROV_GCM_CTX *ctx, unsigned char *aad,
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size_t aad_len, const unsigned char *in,
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size_t in_len, unsigned char *out,
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unsigned char *tag, size_t taglen));
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struct prov_gcm_hw_st {
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OSSL_GCM_setkey_fn setkey;
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OSSL_GCM_setiv_fn setiv;
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OSSL_GCM_aadupdate_fn aadupdate;
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OSSL_GCM_cipherupdate_fn cipherupdate;
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OSSL_GCM_cipherfinal_fn cipherfinal;
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OSSL_GCM_oneshot_fn oneshot;
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};
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OSSL_FUNC_cipher_encrypt_init_fn ossl_gcm_einit;
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OSSL_FUNC_cipher_decrypt_init_fn ossl_gcm_dinit;
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OSSL_FUNC_cipher_get_ctx_params_fn ossl_gcm_get_ctx_params;
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OSSL_FUNC_cipher_set_ctx_params_fn ossl_gcm_set_ctx_params;
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OSSL_FUNC_cipher_cipher_fn ossl_gcm_cipher;
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OSSL_FUNC_cipher_update_fn ossl_gcm_stream_update;
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OSSL_FUNC_cipher_final_fn ossl_gcm_stream_final;
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void ossl_gcm_initctx(void *provctx, PROV_GCM_CTX *ctx, size_t keybits,
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const PROV_GCM_HW *hw);
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int ossl_gcm_setiv(PROV_GCM_CTX *ctx, const unsigned char *iv, size_t ivlen);
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int ossl_gcm_aad_update(PROV_GCM_CTX *ctx, const unsigned char *aad,
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size_t aad_len);
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int ossl_gcm_cipher_final(PROV_GCM_CTX *ctx, unsigned char *tag);
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int ossl_gcm_one_shot(PROV_GCM_CTX *ctx, unsigned char *aad, size_t aad_len,
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const unsigned char *in, size_t in_len,
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unsigned char *out, unsigned char *tag, size_t tag_len);
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int ossl_gcm_cipher_update(PROV_GCM_CTX *ctx, const unsigned char *in,
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size_t len, unsigned char *out);
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# define GCM_HW_SET_KEY_CTR_FN(ks, fn_set_enc_key, fn_block, fn_ctr) \
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ctx->ks = ks; \
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fn_set_enc_key(key, keylen * 8, ks); \
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CRYPTO_gcm128_init(&ctx->gcm, ks, (block128_f)fn_block); \
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ctx->ctr = (ctr128_f)fn_ctr; \
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ctx->key_set = 1;
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#endif
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