196 lines
4.0 KiB
C
196 lines
4.0 KiB
C
/*
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* Copyright (C) 2019 Sean Parkinson, wolfSSL Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "wolfssl_common.h"
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#include "wolfssl_util.h"
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#include <utils/debug.h>
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#include <wolfssl/wolfcrypt/hash.h>
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#include <wolfssl/wolfcrypt/rsa.h>
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/**
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* Described in header.
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*/
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bool wolfssl_hash_chunk(int hash_type, chunk_t data, chunk_t *hash)
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{
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int ret;
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*hash = chunk_alloc(wc_HashGetDigestSize(hash_type));
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ret = wc_Hash(hash_type, data.ptr, data.len, hash->ptr, hash->len);
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if (ret < 0)
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{
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chunk_free(hash);
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return FALSE;
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}
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return TRUE;
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}
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/**
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* Described in header.
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*/
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bool wolfssl_mp2chunk(mp_int *mp, chunk_t *chunk)
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{
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*chunk = chunk_alloc(mp_unsigned_bin_size(mp));
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if (mp_to_unsigned_bin(mp, chunk->ptr) == 0)
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{
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if (chunk->len && chunk->ptr[0] & 0x80)
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{ /* if MSB is set, prepend a zero to make it non-negative */
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*chunk = chunk_cat("cm", chunk_from_chars(0x00), *chunk);
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}
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return TRUE;
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}
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chunk_free(chunk);
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return FALSE;
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}
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/**
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* Described in header.
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*/
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bool wolfssl_mp_split(chunk_t chunk, mp_int *a, mp_int *b)
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{
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int ret;
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int len;
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if ((chunk.len % 2) == 1)
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{
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return FALSE;
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}
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len = chunk.len / 2;
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ret = mp_read_unsigned_bin(a, chunk.ptr, len);
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if (ret == 0)
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{
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ret = mp_read_unsigned_bin(b, chunk.ptr + len, len);
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}
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return ret == 0;
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}
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/**
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* Described in header.
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*/
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bool wolfssl_mp_cat(int len, mp_int *a, mp_int *b, chunk_t *chunk)
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{
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int ret;
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int sz;
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*chunk = chunk_alloc(len);
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if (b != NULL)
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{
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len /= 2;
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}
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sz = mp_unsigned_bin_size(a);
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memset(chunk->ptr, 0, len - sz);
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ret = mp_to_unsigned_bin(a, chunk->ptr + len - sz);
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if (ret == 0 && b != NULL)
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{
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sz = mp_unsigned_bin_size(b);
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memset(chunk->ptr + len, 0, len - sz);
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ret = mp_to_unsigned_bin(b, chunk->ptr + 2 * len - sz);
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}
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return ret == 0;
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}
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/**
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* Described in header.
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*/
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bool wolfssl_hash2type(hash_algorithm_t hash, enum wc_HashType *type)
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{
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switch (hash)
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{
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#ifndef NO_MD5
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case HASH_MD5:
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*type = WC_HASH_TYPE_MD5;
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break;
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#endif
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#ifndef NO_SHA
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case HASH_SHA1:
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*type = WC_HASH_TYPE_SHA;
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break;
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#endif
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#ifdef WOLFSSL_SHA224
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case HASH_SHA224:
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*type = WC_HASH_TYPE_SHA224;
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break;
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#endif
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#ifndef NO_SHA256
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case HASH_SHA256:
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*type = WC_HASH_TYPE_SHA256;
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break;
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#endif
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#ifdef WOLFSSL_SHA384
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case HASH_SHA384:
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*type = WC_HASH_TYPE_SHA384;
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break;
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#endif
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#ifdef WOLFSSL_SHA512
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case HASH_SHA512:
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*type = WC_HASH_TYPE_SHA512;
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break;
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#endif
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default:
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return FALSE;
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}
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return TRUE;
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}
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/**
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* Described in header.
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*/
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bool wolfssl_hash2mgf1(hash_algorithm_t hash, int *mgf1)
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{
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switch (hash)
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{
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#ifndef NO_SHA
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case HASH_SHA1:
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*mgf1 = WC_MGF1SHA1;
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break;
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#endif
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#ifdef WOLFSSL_SHA224
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case HASH_SHA224:
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*mgf1 = WC_MGF1SHA224;
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break;
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#endif
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#ifndef NO_SHA256
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case HASH_SHA256:
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*mgf1 = WC_MGF1SHA256;
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break;
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#endif
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#ifdef WOLFSSL_SHA384
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case HASH_SHA384:
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*mgf1 = WC_MGF1SHA384;
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break;
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#endif
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#ifdef WOLFSSL_SHA512
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case HASH_SHA512:
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*mgf1 = WC_MGF1SHA512;
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break;
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#endif
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default:
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return FALSE;
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}
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return TRUE;
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}
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