Signature verification on device files is not supported by IMA in the
kernel, so remove calculation of digests over devices files.
Signed-off-by: Stefan Berger <stefanb@xxxxxxxxxxxxx>
Reviewed-by: Mimi Zohar <zohar@xxxxxxxxxxxxx>
---
src/libimaevm.c | 14 --------------
1 file changed, 14 deletions(-)
diff --git a/src/libimaevm.c b/src/libimaevm.c
index 2856270..4d51901 100644
--- a/src/libimaevm.c
+++ b/src/libimaevm.c
@@ -225,16 +225,6 @@ static int add_link_hash(const char *path, EVP_MD_CTX *ctx)
return !EVP_DigestUpdate(ctx, buf, len);
}
-static int add_dev_hash(struct stat *st, EVP_MD_CTX *ctx)
-{
- uint32_t dev = st->st_rdev;
- unsigned major = (dev & 0xfff00) >> 8;
- unsigned minor = (dev & 0xff) | ((dev >> 12) & 0xfff00);
-
- log_info("device: %u:%u\n", major, minor);
- return !EVP_DigestUpdate(ctx, &dev, sizeof(dev));
-}
-
int ima_calc_hash(const char *file, uint8_t *hash)
{
const EVP_MD *md;
@@ -281,10 +271,6 @@ int ima_calc_hash(const char *file, uint8_t *hash)
case S_IFLNK:
err = add_link_hash(file, pctx);
break;
- case S_IFIFO: case S_IFSOCK:
- case S_IFCHR: case S_IFBLK:
- err = add_dev_hash(&st, pctx);
- break;
default:
log_err("Unsupported file type (0x%x)", st.st_mode & S_IFMT);
err = -1;
--
2.31.1
