554 lines
21 KiB
C
Executable File
554 lines
21 KiB
C
Executable File
/*
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*
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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 platform compatibility.
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* And sufficient input validation is performed before 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) 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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*(unsigned char *)(dest) = *(const unsigned char *)(src); \
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break; \
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case 2: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 2); \
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break; \
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case 3: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 3); \
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break; \
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case 4: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 4); \
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break; \
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case 5: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 5); \
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break; \
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case 6: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 6); \
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break; \
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case 7: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 7); \
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break; \
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case 8: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 8); \
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break; \
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case 9: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 9); \
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break; \
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case 10: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 10); \
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break; \
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case 11: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 11); \
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break; \
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case 12: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 12); \
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break; \
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case 13: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 13); \
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break; \
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case 14: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 14); \
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break; \
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case 15: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 15); \
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break; \
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case 16: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 16); \
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break; \
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case 17: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 17); \
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break; \
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case 18: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 18); \
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break; \
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case 19: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 19); \
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break; \
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case 20: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 20); \
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break; \
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case 21: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 21); \
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break; \
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case 22: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 22); \
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break; \
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case 23: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 23); \
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break; \
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case 24: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 24); \
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break; \
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case 25: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 25); \
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break; \
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case 26: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 26); \
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break; \
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case 27: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 27); \
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break; \
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case 28: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 28); \
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break; \
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case 29: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 29); \
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break; \
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case 30: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 30); \
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break; \
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case 31: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 31); \
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break; \
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case 32: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 32); \
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break; \
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case 33: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 33); \
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break; \
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case 34: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 34); \
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break; \
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case 35: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 35); \
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break; \
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case 36: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 36); \
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break; \
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case 37: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 37); \
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break; \
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case 38: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 38); \
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break; \
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case 39: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 39); \
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break; \
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case 40: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 40); \
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break; \
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case 41: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 41); \
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break; \
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case 42: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 42); \
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break; \
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case 43: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 43); \
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break; \
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case 44: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 44); \
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break; \
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case 45: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 45); \
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break; \
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case 46: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 46); \
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break; \
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case 47: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 47); \
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break; \
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case 48: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 48); \
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break; \
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case 49: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 49); \
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break; \
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case 50: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 50); \
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break; \
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case 51: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 51); \
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break; \
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case 52: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 52); \
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break; \
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case 53: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 53); \
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break; \
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case 54: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 54); \
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break; \
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case 55: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 55); \
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break; \
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case 56: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 56); \
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break; \
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case 57: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 57); \
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break; \
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case 58: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 58); \
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break; \
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case 59: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 59); \
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break; \
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case 60: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 60); \
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break; \
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case 61: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 61); \
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break; \
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case 62: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 62); \
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break; \
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case 63: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 63); \
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break; \
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case 64: \
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SECUREC_COPY_VALUE_BY_STRUCT((dest), (src), 64); \
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break; \
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default: \
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/* Do nothing */ \
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break; \
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} /* END switch */ \
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} else { \
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unsigned char *tmpDest_ = (unsigned char *)(dest); \
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const unsigned char *tmpSrc_ = (const unsigned 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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/* Do nothing */ \
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break; \
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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) 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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} 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, const void *src, size_t count)
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{
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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) (SECUREC_LIKELY((count) <= (destMax) && \
|
|
(dest) != NULL && (src) != NULL && \
|
|
(count) > 0 && SECUREC_MEMORY_NO_OVERLAP((dest), (src), (count))))
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|
#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
|
|
|