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3 nishi 1 
/* $Id: sha512.c 4 2024-08-20 21:10:25Z nishi $ */
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#include "rv_sha512.h"
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#include <openssl/sha.h>
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#include <stdlib.h>
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#include <string.h>
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char* rv_sha512(const char* string) {
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	const char hex[] = "0123456789abcdef";
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	unsigned char* hash = malloc(SHA512_DIGEST_LENGTH);
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	SHA512((const unsigned char*)string, strlen(string), hash);
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	char* str = malloc(512 / 4 + 1);
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	int i;
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	for(i = 0; i < 512 / 8; i++) {
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		str[2 * i + 0] = hex[(hash[i] >> 4) & 0xf];
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		str[2 * i + 1] = hex[(hash[i] & 0xf)];
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	}
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	free(hash);
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	return str;
3 nishi 22 
}