562 lines
37 KiB
C
562 lines
37 KiB
C
/*
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* Copyright (c) Huawei Technologies Co., Ltd. 2014-2018. All rights reserved.
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* Description: memcpy_s function
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* Author: lishunda
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* Create: 2014-02-25
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*/
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/*
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* [Standardize-exceptions] Use unsafe function: Portability
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* [reason] Use unsafe function to implement security function to maintain
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* platform compatibility. And sufficient input validation is performed before
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* calling
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*/
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#include "securecutil.h"
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#ifndef SECUREC_MEMCOPY_WITH_PERFORMANCE
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#define SECUREC_MEMCOPY_WITH_PERFORMANCE 0
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#endif
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#if SECUREC_WITH_PERFORMANCE_ADDONS || SECUREC_MEMCOPY_WITH_PERFORMANCE
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#ifndef SECUREC_MEMCOPY_THRESHOLD_SIZE
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#define SECUREC_MEMCOPY_THRESHOLD_SIZE 64UL
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#endif
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#define SECUREC_SMALL_MEM_COPY(dest, src, count) \
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do { \
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if (SECUREC_ADDR_ALIGNED_8(dest) && SECUREC_ADDR_ALIGNED_8(src)) { \
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/* Use struct assignment */ \
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switch (count) { \
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case 1: \
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*(SecStrBuf1 *)(dest) = *(const SecStrBuf1 *)(src); \
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break; \
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case 2: \
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*(SecStrBuf2 *)(dest) = *(const SecStrBuf2 *)(src); \
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break; \
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case 3: \
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*(SecStrBuf3 *)(dest) = *(const SecStrBuf3 *)(src); \
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break; \
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case 4: \
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*(SecStrBuf4 *)(dest) = *(const SecStrBuf4 *)(src); \
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break; \
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case 5: \
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*(SecStrBuf5 *)(dest) = *(const SecStrBuf5 *)(src); \
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break; \
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case 6: \
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*(SecStrBuf6 *)(dest) = *(const SecStrBuf6 *)(src); \
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break; \
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case 7: \
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*(SecStrBuf7 *)(dest) = *(const SecStrBuf7 *)(src); \
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break; \
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case 8: \
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*(SecStrBuf8 *)(dest) = *(const SecStrBuf8 *)(src); \
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break; \
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case 9: \
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*(SecStrBuf9 *)(dest) = *(const SecStrBuf9 *)(src); \
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break; \
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case 10: \
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*(SecStrBuf10 *)(dest) = *(const SecStrBuf10 *)(src); \
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break; \
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case 11: \
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*(SecStrBuf11 *)(dest) = *(const SecStrBuf11 *)(src); \
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break; \
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case 12: \
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*(SecStrBuf12 *)(dest) = *(const SecStrBuf12 *)(src); \
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break; \
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case 13: \
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*(SecStrBuf13 *)(dest) = *(const SecStrBuf13 *)(src); \
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break; \
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case 14: \
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*(SecStrBuf14 *)(dest) = *(const SecStrBuf14 *)(src); \
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break; \
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case 15: \
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*(SecStrBuf15 *)(dest) = *(const SecStrBuf15 *)(src); \
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break; \
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case 16: \
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*(SecStrBuf16 *)(dest) = *(const SecStrBuf16 *)(src); \
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break; \
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case 17: \
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*(SecStrBuf17 *)(dest) = *(const SecStrBuf17 *)(src); \
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break; \
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case 18: \
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*(SecStrBuf18 *)(dest) = *(const SecStrBuf18 *)(src); \
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break; \
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case 19: \
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*(SecStrBuf19 *)(dest) = *(const SecStrBuf19 *)(src); \
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break; \
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case 20: \
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*(SecStrBuf20 *)(dest) = *(const SecStrBuf20 *)(src); \
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break; \
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case 21: \
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*(SecStrBuf21 *)(dest) = *(const SecStrBuf21 *)(src); \
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break; \
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case 22: \
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*(SecStrBuf22 *)(dest) = *(const SecStrBuf22 *)(src); \
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break; \
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case 23: \
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*(SecStrBuf23 *)(dest) = *(const SecStrBuf23 *)(src); \
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break; \
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case 24: \
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*(SecStrBuf24 *)(dest) = *(const SecStrBuf24 *)(src); \
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break; \
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case 25: \
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*(SecStrBuf25 *)(dest) = *(const SecStrBuf25 *)(src); \
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break; \
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case 26: \
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*(SecStrBuf26 *)(dest) = *(const SecStrBuf26 *)(src); \
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break; \
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case 27: \
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*(SecStrBuf27 *)(dest) = *(const SecStrBuf27 *)(src); \
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break; \
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case 28: \
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*(SecStrBuf28 *)(dest) = *(const SecStrBuf28 *)(src); \
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break; \
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case 29: \
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*(SecStrBuf29 *)(dest) = *(const SecStrBuf29 *)(src); \
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break; \
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case 30: \
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*(SecStrBuf30 *)(dest) = *(const SecStrBuf30 *)(src); \
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break; \
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case 31: \
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*(SecStrBuf31 *)(dest) = *(const SecStrBuf31 *)(src); \
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break; \
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case 32: \
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*(SecStrBuf32 *)(dest) = *(const SecStrBuf32 *)(src); \
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break; \
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case 33: \
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*(SecStrBuf33 *)(dest) = *(const SecStrBuf33 *)(src); \
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break; \
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case 34: \
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*(SecStrBuf34 *)(dest) = *(const SecStrBuf34 *)(src); \
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break; \
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case 35: \
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*(SecStrBuf35 *)(dest) = *(const SecStrBuf35 *)(src); \
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break; \
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case 36: \
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*(SecStrBuf36 *)(dest) = *(const SecStrBuf36 *)(src); \
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break; \
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case 37: \
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*(SecStrBuf37 *)(dest) = *(const SecStrBuf37 *)(src); \
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break; \
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case 38: \
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*(SecStrBuf38 *)(dest) = *(const SecStrBuf38 *)(src); \
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break; \
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case 39: \
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*(SecStrBuf39 *)(dest) = *(const SecStrBuf39 *)(src); \
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break; \
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case 40: \
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*(SecStrBuf40 *)(dest) = *(const SecStrBuf40 *)(src); \
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break; \
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case 41: \
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*(SecStrBuf41 *)(dest) = *(const SecStrBuf41 *)(src); \
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break; \
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case 42: \
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*(SecStrBuf42 *)(dest) = *(const SecStrBuf42 *)(src); \
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break; \
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case 43: \
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*(SecStrBuf43 *)(dest) = *(const SecStrBuf43 *)(src); \
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break; \
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case 44: \
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*(SecStrBuf44 *)(dest) = *(const SecStrBuf44 *)(src); \
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break; \
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case 45: \
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*(SecStrBuf45 *)(dest) = *(const SecStrBuf45 *)(src); \
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break; \
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case 46: \
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*(SecStrBuf46 *)(dest) = *(const SecStrBuf46 *)(src); \
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break; \
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case 47: \
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*(SecStrBuf47 *)(dest) = *(const SecStrBuf47 *)(src); \
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break; \
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case 48: \
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*(SecStrBuf48 *)(dest) = *(const SecStrBuf48 *)(src); \
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break; \
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case 49: \
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*(SecStrBuf49 *)(dest) = *(const SecStrBuf49 *)(src); \
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break; \
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case 50: \
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*(SecStrBuf50 *)(dest) = *(const SecStrBuf50 *)(src); \
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break; \
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case 51: \
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*(SecStrBuf51 *)(dest) = *(const SecStrBuf51 *)(src); \
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break; \
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case 52: \
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*(SecStrBuf52 *)(dest) = *(const SecStrBuf52 *)(src); \
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break; \
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case 53: \
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*(SecStrBuf53 *)(dest) = *(const SecStrBuf53 *)(src); \
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break; \
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case 54: \
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*(SecStrBuf54 *)(dest) = *(const SecStrBuf54 *)(src); \
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break; \
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case 55: \
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*(SecStrBuf55 *)(dest) = *(const SecStrBuf55 *)(src); \
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break; \
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case 56: \
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*(SecStrBuf56 *)(dest) = *(const SecStrBuf56 *)(src); \
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break; \
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case 57: \
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*(SecStrBuf57 *)(dest) = *(const SecStrBuf57 *)(src); \
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break; \
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case 58: \
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*(SecStrBuf58 *)(dest) = *(const SecStrBuf58 *)(src); \
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break; \
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case 59: \
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*(SecStrBuf59 *)(dest) = *(const SecStrBuf59 *)(src); \
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break; \
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case 60: \
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*(SecStrBuf60 *)(dest) = *(const SecStrBuf60 *)(src); \
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break; \
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case 61: \
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*(SecStrBuf61 *)(dest) = *(const SecStrBuf61 *)(src); \
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break; \
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case 62: \
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*(SecStrBuf62 *)(dest) = *(const SecStrBuf62 *)(src); \
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break; \
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case 63: \
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*(SecStrBuf63 *)(dest) = *(const SecStrBuf63 *)(src); \
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break; \
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case 64: \
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*(SecStrBuf64 *)(dest) = *(const SecStrBuf64 *)(src); \
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break; \
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default: \
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break; \
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} /* END switch */ \
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} else { \
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char *tmpDest = (char *)(dest); \
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const char *tmpSrc = (const char *)(src); \
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switch (count) { \
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case 64: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 63: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 62: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 61: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 60: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 59: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 58: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 57: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 56: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 55: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 54: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 53: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 52: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 51: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 50: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 49: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 48: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 47: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 46: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 45: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 44: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 43: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 42: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 41: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 40: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 39: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 38: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 37: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 36: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 35: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 34: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 33: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 32: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 31: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 30: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 29: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 28: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 27: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 26: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 25: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 24: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 23: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 22: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 21: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 20: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 19: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 18: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 17: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 16: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 15: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 14: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 13: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 12: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 11: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 10: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 9: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 8: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 7: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 6: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 5: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 4: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 3: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 2: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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case 1: \
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*(tmpDest++) = *(tmpSrc++); \
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/* fall-through */ /* FALLTHRU */ \
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default: \
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break; \
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} \
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} \
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} \
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SECUREC_WHILE_ZERO
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/*
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* Performance optimization
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*/
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#define SECUREC_MEMCPY_OPT(dest, src, count) \
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do { \
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if ((count) > SECUREC_MEMCOPY_THRESHOLD_SIZE) { \
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SECUREC_MEMCPY_WARP_OPT((dest), (src), (count)); \
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} else { \
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SECUREC_SMALL_MEM_COPY((dest), (src), (count)); \
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} \
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} \
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SECUREC_WHILE_ZERO
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#endif
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/*
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* Handling errors
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*/
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SECUREC_INLINE errno_t SecMemcpyError(void *dest, size_t destMax,
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const void *src, size_t count) {
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if (destMax == 0 || destMax > SECUREC_MEM_MAX_LEN) {
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SECUREC_ERROR_INVALID_RANGE("memcpy_s");
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return ERANGE;
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}
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if (dest == NULL || src == NULL) {
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SECUREC_ERROR_INVALID_PARAMTER("memcpy_s");
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if (dest != NULL) {
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(void)memset(dest, 0, destMax);
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return EINVAL_AND_RESET;
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}
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return EINVAL;
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}
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if (count > destMax) {
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(void)memset(dest, 0, destMax);
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SECUREC_ERROR_INVALID_RANGE("memcpy_s");
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return ERANGE_AND_RESET;
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}
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if (SECUREC_MEMORY_IS_OVERLAP(dest, src, count)) {
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(void)memset(dest, 0, destMax);
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SECUREC_ERROR_BUFFER_OVERLAP("memcpy_s");
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return EOVERLAP_AND_RESET;
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}
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/* Count is 0 or dest equal src also ret EOK */
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return EOK;
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}
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#if defined(SECUREC_COMPATIBLE_WIN_FORMAT)
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/*
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* The fread API in windows will call memcpy_s and pass 0xffffffff to destMax.
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* To avoid the failure of fread, we don't check desMax limit.
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*/
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#define SECUREC_MEMCPY_PARAM_OK(dest, destMax, src, count) \
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(SECUREC_LIKELY((count) <= (destMax) && (dest) != NULL && (src) != NULL && \
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(count) > 0 && \
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SECUREC_MEMORY_NO_OVERLAP((dest), (src), (count))))
|
|
#else
|
|
#define SECUREC_MEMCPY_PARAM_OK(dest, destMax, src, count) \
|
|
(SECUREC_LIKELY((count) <= (destMax) && (dest) != NULL && (src) != NULL && \
|
|
(destMax) <= SECUREC_MEM_MAX_LEN && (count) > 0 && \
|
|
SECUREC_MEMORY_NO_OVERLAP((dest), (src), (count))))
|
|
#endif
|
|
|
|
/*
|
|
* <FUNCTION DESCRIPTION>
|
|
* The memcpy_s function copies n characters from the object pointed to by
|
|
* src into the object pointed to by dest
|
|
*
|
|
* <INPUT PARAMETERS>
|
|
* dest Destination buffer.
|
|
* destMax Size of the destination buffer.
|
|
* src Buffer to copy from.
|
|
* count Number of characters to copy
|
|
*
|
|
* <OUTPUT PARAMETERS>
|
|
* dest buffer is updated.
|
|
*
|
|
* <RETURN VALUE>
|
|
* EOK Success
|
|
* EINVAL dest is NULL and destMax != 0 and destMax <=
|
|
* SECUREC_MEM_MAX_LEN EINVAL_AND_RESET dest != NULL and src is NULLL
|
|
* and destMax != 0 and destMax <= SECUREC_MEM_MAX_LEN ERANGE destMax >
|
|
* SECUREC_MEM_MAX_LEN or destMax is 0 ERANGE_AND_RESET count > destMax
|
|
* and destMax != 0 and destMax <= SECUREC_MEM_MAX_LEN and dest != NULL and
|
|
* src != NULL EOVERLAP_AND_RESET dest buffer and source buffer are
|
|
* overlapped and count <= destMax destMax != 0 and destMax <=
|
|
* SECUREC_MEM_MAX_LEN and dest != NULL and src != NULL and dest != src
|
|
*
|
|
* if an error occured, dest will be filled with 0.
|
|
* If the source and destination overlap, the behavior of memcpy_s is
|
|
* undefined. Use memmove_s to handle overlapping regions.
|
|
*/
|
|
errno_t memcpy_s(void *dest, size_t destMax, const void *src, size_t count) {
|
|
if (SECUREC_MEMCPY_PARAM_OK(dest, destMax, src, count)) {
|
|
#if SECUREC_MEMCOPY_WITH_PERFORMANCE
|
|
SECUREC_MEMCPY_OPT(dest, src, count);
|
|
#else
|
|
SECUREC_MEMCPY_WARP_OPT(dest, src, count);
|
|
#endif
|
|
return EOK;
|
|
}
|
|
/* Meet some runtime violation, return error code */
|
|
return SecMemcpyError(dest, destMax, src, count);
|
|
}
|
|
|
|
#if SECUREC_IN_KERNEL
|
|
EXPORT_SYMBOL(memcpy_s);
|
|
#endif
|
|
|
|
#if SECUREC_WITH_PERFORMANCE_ADDONS
|
|
/*
|
|
* Performance optimization
|
|
*/
|
|
errno_t memcpy_sOptAsm(void *dest, size_t destMax, const void *src,
|
|
size_t count) {
|
|
if (SECUREC_MEMCPY_PARAM_OK(dest, destMax, src, count)) {
|
|
SECUREC_MEMCPY_OPT(dest, src, count);
|
|
return EOK;
|
|
}
|
|
/* Meet some runtime violation, return error code */
|
|
return SecMemcpyError(dest, destMax, src, count);
|
|
}
|
|
|
|
/* Trim judgement on "destMax <= SECUREC_MEM_MAX_LEN" */
|
|
errno_t memcpy_sOptTc(void *dest, size_t destMax, const void *src,
|
|
size_t count) {
|
|
if (SECUREC_LIKELY(count <= destMax && dest != NULL && src != NULL &&
|
|
count > 0 &&
|
|
SECUREC_MEMORY_NO_OVERLAP((dest), (src), (count)))) {
|
|
SECUREC_MEMCPY_OPT(dest, src, count);
|
|
return EOK;
|
|
}
|
|
/* Meet some runtime violation, return error code */
|
|
return SecMemcpyError(dest, destMax, src, count);
|
|
}
|
|
#endif
|