28 lines
636 B
C
28 lines
636 B
C
#include <fcntl.h>
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#include <stdint.h>
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#include <unistd.h>
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#include "siphash/siphash.h"
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#include "hash_data.h"
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uint8_t siphash_key[16];
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uint8_t empty_siphash_key[16];
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void generate_siphash_key(uint8_t hash_key[16]) {
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int fd = open("/dev/urandom", O_RDONLY);
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if (fd < 0 || read(fd, hash_key, 16) != 16) {
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// Fallback or abort
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}
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close(fd);
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}
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uint64_t siphash64_bytes(const void *data, size_t len,uint8_t hash_key[16]) {
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uint8_t out[8];
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if (siphash(data, len, hash_key, out, sizeof(out)) != 0)
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return 0;
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uint64_t hash = 0;
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for (int i = 0; i < 8; ++i)
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hash |= ((uint64_t)out[i]) << (8 * i);
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return hash;
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} |