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41 lines
983 B
41 lines
983 B
#define _POSIX_C_SOURCE 200809L
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#include "util/token.h"
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#include "wlr/util/log.h"
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#include <fcntl.h>
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#include <inttypes.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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bool generate_token(char out[static TOKEN_STRLEN]) {
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static FILE *urandom = NULL;
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uint64_t data[2];
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if (!urandom) {
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int fd = open("/dev/urandom", O_RDONLY | O_CLOEXEC);
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if (fd < 0) {
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wlr_log_errno(WLR_ERROR, "Failed to open random device");
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return false;
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}
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if (!(urandom = fdopen(fd, "r"))) {
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wlr_log_errno(WLR_ERROR, "fdopen failed");
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close(fd);
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return false;
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}
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}
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if (fread(data, sizeof(data), 1, urandom) != 1) {
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wlr_log_errno(WLR_ERROR, "Failed to read from random device");
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return false;
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}
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if (snprintf(out, TOKEN_STRLEN, "%016" PRIx64 "%016" PRIx64, data[0], data[1]) != TOKEN_STRLEN - 1) {
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wlr_log_errno(WLR_ERROR, "Failed to format hex string token");
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return false;
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}
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return true;
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}
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