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ima-evm-utils: libimaevm: get key description out of verbose condition

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Key description in keyring is being filled with memory garbage during
import process if the LOG_LEVEL is not satisfied (using '-vv').

Testing in kernels without trusted keyring support, and importing a v1
(RSA) key pair, the kernel fails to find the key since it looks for the
key description, which is not found due to this issue:

    "digsig: key not found, id: DD0558FEB7DDBD26"

Looking at:
    # keyctl show
    Session Keyring
     635748007 --alswrv      0     0  keyring: _ses
     673181018 --alswrv      0 65534   \_ keyring: _uid.0
     360651479 --alswrv      0     0       \_ keyring: _ima
     499360916 --alswrv      0     0       |   \_ user: .N=
     266933436 --alswrv      0     0       |   \_ user: B641632DA94DEE26

Key id 499360916 and 266933436 are both the same key, but the first was added
without '-vv' in the command line, while the second one was using it.

Signed-off-by: Bruno E. O. Meneguele <bmeneg@redhat.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
This commit is contained in:
Bruno E. O. Meneguele
2018-11-30 18:05:47 -02:00
committed by Mimi Zohar
parent 8c8f29e870
commit 15410695c7
1 changed files with 5 additions and 7 deletions
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10
src/libimaevm.c
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@@ -672,12 +672,11 @@ void calc_keyid_v1(uint8_t *keyid, char *str, const unsigned char *pkey, int len
memcpy(keyid, sha1 + 12, 8);
log_debug("keyid: ");
log_debug_dump(keyid, 8);
if (params.verbose > LOG_INFO) {
id = __be64_to_cpup((__be64 *) keyid);
sprintf(str, "%llX", (unsigned long long)id);
if (params.verbose > LOG_INFO)
log_info("keyid-v1: %s\n", str);
}
}
void calc_keyid_v2(uint32_t *keyid, char *str, RSA *key)
@@ -694,11 +693,10 @@ void calc_keyid_v2(uint32_t *keyid, char *str, RSA *key)
memcpy(keyid, sha1 + 16, 4);
log_debug("keyid: ");
log_debug_dump(keyid, 4);
if (params.verbose > LOG_INFO) {
sprintf(str, "%x", __be32_to_cpup(keyid));
if (params.verbose > LOG_INFO)
log_info("keyid: %s\n", str);
}
free(pkey);
}