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Allow manual setting keyid from a cert file

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Allow user to specify `--keyid-from-cert cert.pem' to extract keyid from
SKID of the certificate file. PEM or DER format is auto-detected.

This commit creates ABI change for libimaevm, due to adding new function
ima_read_keyid(). Newer clients cannot work with older libimaevm.
Together with previous commit it creates backward-incompatible ABI
change, thus soname should be incremented on release.

Signed-off-by: Vitaly Chikunov <vt@altlinux.org>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
This commit is contained in:
Vitaly Chikunov
2021-07-16 18:16:01 +03:00
committed by Mimi Zohar
parent 51b694bfea
commit 0e7a00e26b
5 changed files with 132 additions and 0 deletions
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14
src/evmctl.c
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@ -42,6 +42,7 @@
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <arpa/inet.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
@ -57,12 +58,14 @@
#include <termios.h>
#include <assert.h>
#include <openssl/asn1.h>
#include <openssl/sha.h>
#include <openssl/pem.h>
#include <openssl/hmac.h>
#include <openssl/err.h>
#include <openssl/rsa.h>
#include <openssl/engine.h>
#include <openssl/x509v3.h>
#include "hash_info.h"
#include "pcr.h"
#include "utils.h"
@ -2501,6 +2504,8 @@ static void usage(void)
" --rsa use RSA key type and signing scheme v1\n"
" -k, --key path to signing key (default: /etc/keys/{privkey,pubkey}_evm.pem)\n"
" --keyid n overwrite signature keyid with a 32-bit value in hex (for signing)\n"
" --keyid-from-cert file\n"
" read keyid value from SKID of a x509 cert file\n"
" -o, --portable generate portable EVM signatures\n"
" -p, --pass password for encrypted signing key\n"
" -r, --recursive recurse into directories (sign)\n"
@ -2582,6 +2587,7 @@ static struct option opts[] = {
{"pcrs", 1, 0, 142},
{"verify-bank", 2, 0, 143},
{"keyid", 1, 0, 144},
{"keyid-from-cert", 1, 0, 145},
{}
};
@ -2791,6 +2797,14 @@ int main(int argc, char *argv[])
}
imaevm_params.keyid = keyid;
break;
case 145:
keyid = imaevm_read_keyid(optarg);
if (keyid == 0) {
log_err("Error reading keyid.\n");
exit(1);
}
imaevm_params.keyid = keyid;
break;
case '?':
exit(1);
break;