92 lines
1.9 KiB
C
92 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_av_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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access_vector_t requested,
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struct av_decision *avd)
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{
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char path[PATH_MAX];
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char *buf;
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size_t len;
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int fd, ret;
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snprintf(path, sizeof path, "%s/access", 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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len = PAGE_SIZE;
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buf = malloc(len);
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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, len, "%s %s %hu %x", scon, tcon, tclass, requested);
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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, len);
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ret = read(fd, buf, len-1);
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if (ret < 0)
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goto out2;
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if (sscanf(buf, "%x %x %x %x %u", &avd->allowed,
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&avd->decided, &avd->auditallow, &avd->auditdeny,
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&avd->seqno) != 5) {
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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_av_raw)
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int security_compute_av(security_context_t scon,
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security_context_t tcon,
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security_class_t tclass,
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access_vector_t requested,
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struct av_decision *avd)
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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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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_av_raw(rscon, rtcon, tclass, requested, avd);
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if (context_translations) {
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freecon(rscon);
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freecon(rtcon);
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}
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return ret;
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}
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hidden_def(security_compute_av)
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