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75 lines
2.3 KiB
75 lines
2.3 KiB
#include "cache.h" |
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const signed char hexval_table[256] = { |
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-1, -1, -1, -1, -1, -1, -1, -1, /* 00-07 */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* 08-0f */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* 10-17 */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* 18-1f */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* 20-27 */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* 28-2f */ |
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0, 1, 2, 3, 4, 5, 6, 7, /* 30-37 */ |
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8, 9, -1, -1, -1, -1, -1, -1, /* 38-3f */ |
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-1, 10, 11, 12, 13, 14, 15, -1, /* 40-47 */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* 48-4f */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* 50-57 */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* 58-5f */ |
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-1, 10, 11, 12, 13, 14, 15, -1, /* 60-67 */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* 68-67 */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* 70-77 */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* 78-7f */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* 80-87 */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* 88-8f */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* 90-97 */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* 98-9f */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* a0-a7 */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* a8-af */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* b0-b7 */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* b8-bf */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* c0-c7 */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* c8-cf */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* d0-d7 */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* d8-df */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* e0-e7 */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* e8-ef */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* f0-f7 */ |
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-1, -1, -1, -1, -1, -1, -1, -1, /* f8-ff */ |
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}; |
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int get_sha1_hex(const char *hex, unsigned char *sha1) |
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{ |
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int i; |
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for (i = 0; i < 20; i++) { |
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unsigned int val; |
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/* |
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* hex[1]=='\0' is caught when val is checked below, |
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* but if hex[0] is NUL we have to avoid reading |
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* past the end of the string: |
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*/ |
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if (!hex[0]) |
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return -1; |
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val = (hexval(hex[0]) << 4) | hexval(hex[1]); |
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if (val & ~0xff) |
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return -1; |
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*sha1++ = val; |
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hex += 2; |
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} |
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return 0; |
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} |
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char *sha1_to_hex(const unsigned char *sha1) |
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{ |
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static int bufno; |
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static char hexbuffer[4][50]; |
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static const char hex[] = "0123456789abcdef"; |
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char *buffer = hexbuffer[3 & ++bufno], *buf = buffer; |
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int i; |
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for (i = 0; i < 20; i++) { |
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unsigned int val = *sha1++; |
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*buf++ = hex[val >> 4]; |
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*buf++ = hex[val & 0xf]; |
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} |
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*buf = '\0'; |
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return buffer; |
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}
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