/* * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the Apache License 2.0 (the "License"). You may not use * this file except in compliance with the License. You can obtain a copy * in the file LICENSE in the source distribution or at * https://www.openssl.org/source/license.html */ #include #include #include #include #include "internal/cryptlib.h" #include "crypto/modes.h" #include "crypto/ciphermode_platform.h" #define MAXCHUNK ((size_t)1 << (sizeof(long) * 8 - 2)) #define MAXBITCHUNK ((size_t)1 << (sizeof(size_t) * 8 - 4)) #define GENERIC_BLOCK_SIZE 16 #define IV_STATE_UNINITIALISED 0 /* initial state is not initialized */ #define IV_STATE_BUFFERED 1 /* iv has been copied to the iv buffer */ #define IV_STATE_COPIED 2 /* iv has been copied from the iv buffer */ #define IV_STATE_FINISHED 3 /* the iv has been used - so don't reuse it */ #define PROV_CIPHER_FUNC(type, name, args) typedef type (* OSSL_##name##_fn)args typedef struct prov_cipher_hw_st PROV_CIPHER_HW; typedef struct prov_cipher_ctx_st PROV_CIPHER_CTX; typedef int (PROV_CIPHER_HW_FN)(PROV_CIPHER_CTX *dat, unsigned char *out, const unsigned char *in, size_t len); struct prov_cipher_ctx_st { block128_f block; union { cbc128_f cbc; ctr128_f ctr; } stream; unsigned int mode; size_t keylen; /* key size (in bytes) */ size_t ivlen; size_t blocksize; size_t bufsz; /* Number of bytes in buf */ unsigned int pad : 1; /* Whether padding should be used or not */ unsigned int enc : 1; /* Set to 1 for encrypt, or 0 otherwise */ /* * num contains the number of bytes of |iv| which are valid for modes that * manage partial blocks themselves. */ unsigned int num; uint64_t flags; /* Buffer of partial blocks processed via update calls */ unsigned char buf[GENERIC_BLOCK_SIZE]; unsigned char iv[GENERIC_BLOCK_SIZE]; const PROV_CIPHER_HW *hw; /* hardware specific functions */ const void *ks; /* Pointer to algorithm specific key data */ OPENSSL_CTX *libctx; }; struct prov_cipher_hw_st { int (*init)(PROV_CIPHER_CTX *dat, const uint8_t *key, size_t keylen); PROV_CIPHER_HW_FN *cipher; }; OSSL_OP_cipher_encrypt_init_fn cipher_generic_einit; OSSL_OP_cipher_decrypt_init_fn cipher_generic_dinit; OSSL_OP_cipher_update_fn cipher_generic_block_update; OSSL_OP_cipher_final_fn cipher_generic_block_final; OSSL_OP_cipher_update_fn cipher_generic_stream_update; OSSL_OP_cipher_final_fn cipher_generic_stream_final; OSSL_OP_cipher_cipher_fn cipher_generic_cipher; OSSL_OP_cipher_get_ctx_params_fn cipher_generic_get_ctx_params; OSSL_OP_cipher_set_ctx_params_fn cipher_generic_set_ctx_params; OSSL_OP_cipher_gettable_params_fn cipher_generic_gettable_params; OSSL_OP_cipher_gettable_ctx_params_fn cipher_generic_gettable_ctx_params; OSSL_OP_cipher_settable_ctx_params_fn cipher_generic_settable_ctx_params; OSSL_OP_cipher_gettable_ctx_params_fn cipher_aead_gettable_ctx_params; OSSL_OP_cipher_settable_ctx_params_fn cipher_aead_settable_ctx_params; int cipher_generic_get_params(OSSL_PARAM params[], unsigned int md, unsigned long flags, size_t kbits, size_t blkbits, size_t ivbits); void cipher_generic_initkey(void *vctx, size_t kbits, size_t blkbits, size_t ivbits, unsigned int mode, uint64_t flags, const PROV_CIPHER_HW *hw, void *provctx); #define IMPLEMENT_generic_cipher(alg, UCALG, lcmode, UCMODE, flags, kbits, \ blkbits, ivbits, typ) \ static OSSL_OP_cipher_get_params_fn alg##_##kbits##_##lcmode##_get_params; \ static int alg##_##kbits##_##lcmode##_get_params(OSSL_PARAM params[]) \ { \ return cipher_generic_get_params(params, EVP_CIPH_##UCMODE##_MODE, flags, \ kbits, blkbits, ivbits); \ } \ static OSSL_OP_cipher_newctx_fn alg##_##kbits##_##lcmode##_newctx; \ static void * alg##_##kbits##_##lcmode##_newctx(void *provctx) \ { \ PROV_##UCALG##_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx)); \ if (ctx != NULL) { \ cipher_generic_initkey(ctx, kbits, blkbits, ivbits, \ EVP_CIPH_##UCMODE##_MODE, flags, \ PROV_CIPHER_HW_##alg##_##lcmode(kbits), NULL); \ } \ return ctx; \ } \ const OSSL_DISPATCH alg##kbits##lcmode##_functions[] = { \ { OSSL_FUNC_CIPHER_NEWCTX, \ (void (*)(void)) alg##_##kbits##_##lcmode##_newctx }, \ { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void)) alg##_freectx }, \ { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void)) alg##_dupctx }, \ { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))cipher_generic_einit }, \ { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))cipher_generic_dinit }, \ { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))cipher_generic_##typ##_update },\ { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))cipher_generic_##typ##_final }, \ { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))cipher_generic_cipher }, \ { OSSL_FUNC_CIPHER_GET_PARAMS, \ (void (*)(void)) alg##_##kbits##_##lcmode##_get_params }, \ { OSSL_FUNC_CIPHER_GET_CTX_PARAMS, \ (void (*)(void))cipher_generic_get_ctx_params }, \ { OSSL_FUNC_CIPHER_SET_CTX_PARAMS, \ (void (*)(void))cipher_generic_set_ctx_params }, \ { OSSL_FUNC_CIPHER_GETTABLE_PARAMS, \ (void (*)(void))cipher_generic_gettable_params }, \ { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS, \ (void (*)(void))cipher_generic_gettable_ctx_params }, \ { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS, \ (void (*)(void))cipher_generic_settable_ctx_params }, \ { 0, NULL } \ }; PROV_CIPHER_HW_FN cipher_hw_generic_cbc; PROV_CIPHER_HW_FN cipher_hw_generic_ecb; PROV_CIPHER_HW_FN cipher_hw_generic_ofb128; PROV_CIPHER_HW_FN cipher_hw_generic_cfb128; PROV_CIPHER_HW_FN cipher_hw_generic_cfb8; PROV_CIPHER_HW_FN cipher_hw_generic_cfb1; PROV_CIPHER_HW_FN cipher_hw_generic_ctr; PROV_CIPHER_HW_FN cipher_hw_chunked_cbc; PROV_CIPHER_HW_FN cipher_hw_chunked_cfb8; PROV_CIPHER_HW_FN cipher_hw_chunked_cfb128; PROV_CIPHER_HW_FN cipher_hw_chunked_ofb128; #define cipher_hw_chunked_ecb cipher_hw_generic_ecb #define cipher_hw_chunked_ctr cipher_hw_generic_ctr #define cipher_hw_chunked_cfb1 cipher_hw_generic_cfb1 #define IMPLEMENT_CIPHER_HW_OFB(MODE, NAME, CTX_NAME, KEY_NAME, FUNC_PREFIX) \ static int cipher_hw_##NAME##_##MODE##_cipher(PROV_CIPHER_CTX *ctx, \ unsigned char *out, \ const unsigned char *in, size_t len) \ { \ int num = ctx->num; \ KEY_NAME *key = &(((CTX_NAME *)ctx)->ks.ks); \ \ while (len >= MAXCHUNK) { \ FUNC_PREFIX##_encrypt(in, out, MAXCHUNK, key, ctx->iv, &num); \ len -= MAXCHUNK; \ in += MAXCHUNK; \ out += MAXCHUNK; \ } \ if (len > 0) { \ FUNC_PREFIX##_encrypt(in, out, (long)len, key, ctx->iv, &num); \ } \ ctx->num = num; \ return 1; \ } #define IMPLEMENT_CIPHER_HW_ECB(MODE, NAME, CTX_NAME, KEY_NAME, FUNC_PREFIX) \ static int cipher_hw_##NAME##_##MODE##_cipher(PROV_CIPHER_CTX *ctx, \ unsigned char *out, \ const unsigned char *in, size_t len) \ { \ size_t i, bl = ctx->blocksize; \ KEY_NAME *key = &(((CTX_NAME *)ctx)->ks.ks); \ \ if (len < bl) \ return 1; \ for (i = 0, len -= bl; i <= len; i += bl) \ FUNC_PREFIX##_encrypt(in + i, out + i, key, ctx->enc); \ return 1; \ } #define IMPLEMENT_CIPHER_HW_CBC(MODE, NAME, CTX_NAME, KEY_NAME, FUNC_PREFIX) \ static int cipher_hw_##NAME##_##MODE##_cipher(PROV_CIPHER_CTX *ctx, \ unsigned char *out, \ const unsigned char *in, size_t len) \ { \ KEY_NAME *key = &(((CTX_NAME *)ctx)->ks.ks); \ \ while (len >= MAXCHUNK) { \ FUNC_PREFIX##_encrypt(in, out, MAXCHUNK, key, ctx->iv, ctx->enc); \ len -= MAXCHUNK; \ in += MAXCHUNK; \ out += MAXCHUNK; \ } \ if (len > 0) \ FUNC_PREFIX##_encrypt(in, out, (long)len, key, ctx->iv, ctx->enc); \ return 1; \ } #define IMPLEMENT_CIPHER_HW_CFB(MODE, NAME, CTX_NAME, KEY_NAME, FUNC_PREFIX) \ static int cipher_hw_##NAME##_##MODE##_cipher(PROV_CIPHER_CTX *ctx, \ unsigned char *out, \ const unsigned char *in, size_t len) \ { \ size_t chunk = MAXCHUNK; \ KEY_NAME *key = &(((CTX_NAME *)ctx)->ks.ks); \ int num = ctx->num; \ \ if (len < chunk) \ chunk = len; \ while (len > 0 && len >= chunk) { \ FUNC_PREFIX##_encrypt(in, out, (long)chunk, key, ctx->iv, &num, \ ctx->enc); \ len -= chunk; \ in += chunk; \ out += chunk; \ if (len < chunk) \ chunk = len; \ } \ ctx->num = num; \ return 1; \ } #define CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_START(name) \ static const OSSL_PARAM name##_known_gettable_ctx_params[] = { \ OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL), \ OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_IVLEN, NULL), \ OSSL_PARAM_uint(OSSL_CIPHER_PARAM_PADDING, NULL), \ OSSL_PARAM_uint(OSSL_CIPHER_PARAM_NUM, NULL), \ OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_IV, NULL, 0), #define CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_END(name) \ OSSL_PARAM_END \ }; \ const OSSL_PARAM * name##_gettable_ctx_params(void) \ { \ return name##_known_gettable_ctx_params; \ } #define CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_START(name) \ static const OSSL_PARAM name##_known_settable_ctx_params[] = { \ OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL), \ OSSL_PARAM_uint(OSSL_CIPHER_PARAM_PADDING, NULL), \ OSSL_PARAM_uint(OSSL_CIPHER_PARAM_NUM, NULL), #define CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_END(name) \ OSSL_PARAM_END \ }; \ const OSSL_PARAM * name##_settable_ctx_params(void) \ { \ return name##_known_settable_ctx_params; \ } size_t fillblock(unsigned char *buf, size_t *buflen, size_t blocksize, const unsigned char **in, size_t *inlen); int trailingdata(unsigned char *buf, size_t *buflen, size_t blocksize, const unsigned char **in, size_t *inlen);