63 lines
983 B
C
63 lines
983 B
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "sha2.h"
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#define BUF_SIZE 16384
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int main(int argc, char *argv[])
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{ FILE *inf;
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sha256_ctx ctx[1];
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unsigned char buf[BUF_SIZE], hval[SHA256_DIGEST_SIZE];
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int i, len, is_console;
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if(argc != 2)
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{
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printf("\nusage: shasum filename\n");
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exit(0);
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}
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if(is_console = (!strcmp(argv[1], "con") || !strcmp(argv[1], "CON")))
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{
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if(!(inf = fopen(argv[1], "r")))
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{
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printf("\n%s not found\n", argv[1]);
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exit(0);
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}
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}
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else if(!(inf = fopen(argv[1], "rb")))
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{
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printf("\n%s not found\n", argv[1]);
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exit(0);
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}
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sha256_begin(ctx);
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do
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{
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len = (int)fread(buf, 1, BUF_SIZE, inf);
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i = len;
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if(is_console)
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{
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i = 0;
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while(i < len && buf[i] != '\x1a')
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++i;
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}
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if(i)
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sha256_hash(buf, i, ctx);
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}
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while
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(len && i == len);
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fclose(inf);
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sha256_end(hval, ctx);
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printf("\n");
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for(i = 0; i < SHA256_DIGEST_SIZE; ++i)
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printf("%02x", hval[i]);
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printf("\n");
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return 0;
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}
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