95 lines
1.9 KiB
C
95 lines
1.9 KiB
C
#include <unistd.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <asm/page.h>
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#include "selinux_internal.h"
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#include "policy.h"
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#include <limits.h>
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int security_compute_member_raw(security_context_t scon,
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security_context_t tcon,
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security_class_t tclass,
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security_context_t *newcon)
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{
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char path[PATH_MAX];
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char *buf;
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size_t size;
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int fd, ret;
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snprintf(path, sizeof path, "%s/member", selinux_mnt);
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fd = open(path, O_RDWR);
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if (fd < 0)
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return -1;
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size = PAGE_SIZE;
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buf = malloc(size);
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if (!buf) {
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ret = -1;
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goto out;
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}
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snprintf(buf, size, "%s %s %hu", scon, tcon, tclass);
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ret = write(fd, buf, strlen(buf));
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if (ret < 0)
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goto out2;
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memset(buf, 0, size);
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ret = read(fd, buf, size-1);
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if (ret < 0)
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goto out2;
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*newcon = strdup(buf);
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if (!(*newcon)) {
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ret = -1;
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goto out2;
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}
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ret = 0;
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out2:
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free(buf);
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out:
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close(fd);
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return ret;
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}
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hidden_def(security_compute_member_raw)
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int security_compute_member(security_context_t scon,
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security_context_t tcon,
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security_class_t tclass,
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security_context_t *newcon)
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{
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int ret;
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security_context_t rscon = scon;
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security_context_t rtcon = tcon;
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security_context_t rnewcon;
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if (context_translations) {
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if (trans_to_raw_context(scon, &rscon))
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return -1;
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if (trans_to_raw_context(tcon, &rtcon)) {
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freecon(rscon);
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return -1;
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}
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}
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ret = security_compute_member_raw(rscon, rtcon, tclass, &rnewcon);
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if (context_translations) {
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freecon(rscon);
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freecon(rtcon);
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if (!ret) {
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if (raw_to_trans_context(rnewcon, newcon)) {
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*newcon = NULL;
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ret = -1;
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}
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freecon(rnewcon);
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}
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} else if (!ret)
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*newcon = rnewcon;
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return ret;
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}
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