From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="Hg8F9RKi" Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 47564D59 for ; Wed, 6 Dec 2023 11:28:22 -0800 (PST) Received: from pps.filterd (m0353726.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3B6IBO5b032325 for ; Wed, 6 Dec 2023 19:28:22 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=qBos7qAdicQFU7iHX6j0/jVV7BvvC/RF1NT2N3+y26Y=; b=Hg8F9RKim3Bp2TqJXxTv3zNdrfkY27BJHXSe1GebTWtXEA9sFs9sX1ZWkI11vFwB6BG1 fT0He8A31Kg9+W5s7bn8F92+/kV6py71ra6IUsaIDvn1AgXRyaSpfB9gS1b8nqFYSyYX 60wucE8VVdRO6/Sgw6y5R0RW2A3jAQGja8AWz85tihZ/pOKtlhtjBBGIKK7zZmzHpM2n w2gSFsMw2LJqi6DOIJhmxw1fC+54bXfm6DNnQbEnhGvLvcEAcJcViPu9D8tkTJqXvkCl caAu+r1UAq90Ej4qKsHa0+jfugco8B0WIHD6epiJ1OwXucoJCMlVkLcsn7QIkGFvMMWY /Q== Received: from ppma23.wdc07v.mail.ibm.com (5d.69.3da9.ip4.static.sl-reverse.com [169.61.105.93]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3utv6qwmea-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 06 Dec 2023 19:28:22 +0000 Received: from pps.filterd (ppma23.wdc07v.mail.ibm.com [127.0.0.1]) by ppma23.wdc07v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 3B6ITDVY013743 for ; Wed, 6 Dec 2023 19:28:21 GMT Received: from smtprelay01.fra02v.mail.ibm.com ([9.218.2.227]) by ppma23.wdc07v.mail.ibm.com (PPS) with ESMTPS id 3utau46jus-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 06 Dec 2023 19:28:20 +0000 Received: from smtpav05.fra02v.mail.ibm.com (smtpav05.fra02v.mail.ibm.com [10.20.54.104]) by smtprelay01.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 3B6JSHK518022948 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 6 Dec 2023 19:28:18 GMT Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C91C72004F; Wed, 6 Dec 2023 19:28:17 +0000 (GMT) Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EE2CB2004D; Wed, 6 Dec 2023 19:28:16 +0000 (GMT) Received: from li-f45666cc-3089-11b2-a85c-c57d1a57929f.ibm.com.com (unknown [9.61.99.183]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 6 Dec 2023 19:28:16 +0000 (GMT) From: Mimi Zohar To: linux-integrity@vger.kernel.org Cc: Stefan Berger , Mimi Zohar Subject: [ima-evm-utils PATCH v2 11/13] Use a file specific hash algorithm variable for signing files Date: Wed, 6 Dec 2023 14:27:32 -0500 Message-Id: <20231206192734.339999-12-zohar@linux.ibm.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20231206192734.339999-1-zohar@linux.ibm.com> References: <20231206192734.339999-1-zohar@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-integrity@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 7bv66lT7UAEjVBrC7X4yFXjg7KYbgnI1 X-Proofpoint-ORIG-GUID: 7bv66lT7UAEjVBrC7X4yFXjg7KYbgnI1 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-06_16,2023-12-06_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 spamscore=0 mlxscore=0 adultscore=0 lowpriorityscore=0 mlxlogscore=999 clxscore=1015 impostorscore=0 priorityscore=1501 bulkscore=0 suspectscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2312060141 Instead of relying on the library "imaevm_params.algo" global variable, which is not concurrency-safe, define and use an evmctl file specific hash algorithm variable. Propagate using the file specific hash algorithm variable in sign_evm(), sign_ima(), hash_ima(), and sign_hash() function. Replace using the library function ima_calc_hash() with ima_calc_hash2(). Signed-off-by: Mimi Zohar --- src/evmctl.c | 34 +++++++++++++++++----------------- 1 file changed, 17 insertions(+), 17 deletions(-) diff --git a/src/evmctl.c b/src/evmctl.c index 9e1f4e33bc01..8eb2c46fbff0 100644 --- a/src/evmctl.c +++ b/src/evmctl.c @@ -140,6 +140,7 @@ static bool evm_immutable; static bool evm_portable; static bool veritysig; static bool hwtpm; +static char *g_hash_algo = DEFAULT_HASH_ALGO; #define HMAC_FLAG_NO_UUID 0x0001 #define HMAC_FLAG_CAPS_SET 0x0002 @@ -564,18 +565,18 @@ out: return err; } -static int sign_evm(const char *file, const char *key) +static int sign_evm(const char *file, char *hash_algo, const char *key) { unsigned char hash[MAX_DIGEST_SIZE]; unsigned char sig[MAX_SIGNATURE_SIZE]; int len, err; - len = calc_evm_hash(file, imaevm_params.hash_algo, hash); + len = calc_evm_hash(file, hash_algo, hash); if (len <= 1) return len; assert(len <= sizeof(hash)); - len = sign_hash(imaevm_params.hash_algo, hash, len, key, NULL, sig + 1); + len = sign_hash(hash_algo, hash, len, key, NULL, sig + 1); if (len <= 1) return len; assert(len < sizeof(sig)); @@ -609,10 +610,10 @@ static int hash_ima(const char *file) { unsigned char hash[MAX_DIGEST_SIZE + 2]; /* +2 byte xattr header */ int len, err, offset; - int algo = imaevm_get_hash_algo(imaevm_params.hash_algo); + int algo = imaevm_get_hash_algo(g_hash_algo); if (algo < 0) { - log_err("Unknown hash algo: %s\n", imaevm_params.hash_algo); + log_err("Unknown hash algo: %s\n", g_hash_algo); return -1; } if (algo > PKEY_HASH_SHA1) { @@ -624,7 +625,7 @@ static int hash_ima(const char *file) offset = 1; } - len = ima_calc_hash(file, hash + offset); + len = ima_calc_hash2(file, g_hash_algo, hash + offset); if (len <= 1) return len; assert(len + offset <= sizeof(hash)); @@ -632,7 +633,7 @@ static int hash_ima(const char *file) len += offset; if (imaevm_params.verbose >= LOG_INFO) - log_info("hash(%s): ", imaevm_params.hash_algo); + log_info("hash(%s): ", g_hash_algo); if (sigdump || imaevm_params.verbose >= LOG_INFO) imaevm_hexdump(hash, len); @@ -650,18 +651,18 @@ static int hash_ima(const char *file) return 0; } -static int sign_ima(const char *file, const char *key) +static int sign_ima(const char *file, char *hash_algo, const char *key) { unsigned char hash[MAX_DIGEST_SIZE]; unsigned char sig[MAX_SIGNATURE_SIZE]; int len, err; - len = ima_calc_hash(file, hash); + len = ima_calc_hash2(file, hash_algo, hash); if (len <= 1) return len; assert(len <= sizeof(hash)); - len = sign_hash(imaevm_params.hash_algo, hash, len, key, NULL, sig + 1); + len = sign_hash(hash_algo, hash, len, key, NULL, sig + 1); if (len <= 1) return len; assert(len < sizeof(sig)); @@ -751,7 +752,7 @@ static int sign_ima_file(const char *file) key = imaevm_params.keyfile ? : "/etc/keys/privkey_evm.pem"; - return sign_ima(file, key); + return sign_ima(file, g_hash_algo, key); } static int cmd_sign_ima(struct command *cmd) @@ -854,7 +855,7 @@ static int cmd_sign_hash(struct command *cmd) assert(hashlen / 2 <= sizeof(hash)); hex2bin(hash, line, hashlen / 2); - siglen = sign_hash(imaevm_params.hash_algo, hash, + siglen = sign_hash(g_hash_algo, hash, hashlen / 2, key, NULL, sig + 1); sig[0] = EVM_IMA_XATTR_DIGSIG; } @@ -874,7 +875,6 @@ static int cmd_sign_hash(struct command *cmd) print_usage(cmd); return -1; } - return 0; } @@ -886,7 +886,7 @@ static int sign_evm_path(const char *file) key = imaevm_params.keyfile ? : "/etc/keys/privkey_evm.pem"; if (digsig) { - err = sign_ima(file, key); + err = sign_ima(file, g_hash_algo, key); if (err) return err; } @@ -897,7 +897,7 @@ static int sign_evm_path(const char *file) return err; } - return sign_evm(file, key); + return sign_evm(file, g_hash_algo, key); } static int cmd_sign_evm(struct command *cmd) @@ -1426,7 +1426,7 @@ static int cmd_hmac_evm(struct command *cmd) key = imaevm_params.keyfile ? : "/etc/keys/privkey_evm.pem"; if (digsig) { - err = sign_ima(file, key); + err = sign_ima(file, g_hash_algo, key); if (err) return err; } @@ -3087,7 +3087,7 @@ int main(int argc, char *argv[]) sigdump = 1; break; case 'a': - imaevm_params.hash_algo = optarg; + g_hash_algo = optarg; break; case 'p': if (optarg) -- 2.39.3