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Blame SOURCES/0034-rpmsign-Adopting-PKCS11-opaque-keys-support-in-libfsverity-for-fsverity-signatures.patch

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From aee5af8e4fe7908df90649eb699c3a1decf06b0c Mon Sep 17 00:00:00 2001
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From: Yu Wu <wuyu@fb.com>
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Date: Wed, 3 Nov 2021 23:13:15 -0700
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Subject: [PATCH 1/2] rpmsign: Adopting PKCS#11 opaque keys support in
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 libfsverity for fsverity signatures
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---
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 rpmsign.c            | 29 ++++++++++++++++++++----
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 sign/rpmgensig.c     | 53 +++++++++++++++++++++++++++++++++++++++-----
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 sign/rpmsignverity.c | 24 +++++++++++++-------
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 sign/rpmsignverity.h |  9 +++++---
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 4 files changed, 94 insertions(+), 21 deletions(-)
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diff --git a/rpmsign.c b/rpmsign.c
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index 12299379ce..63b8616382 100644
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--- a/rpmsign.c
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+++ b/rpmsign.c
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@@ -24,6 +24,9 @@ static int fskpass = 0;
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 static char * fileSigningKey = NULL;
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 #endif
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 #ifdef WITH_FSVERITY
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+static char * pkcs11Engine = NULL;
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+static char * pkcs11Module = NULL;
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+static char * pkcs11KeyId = NULL;
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 static char * fileSigningCert = NULL;
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 static char * verityAlgorithm = NULL;
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 #endif
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@@ -59,6 +62,15 @@ static struct poptOption signOptsTable[] = {
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     { "certpath", '\0', POPT_ARG_STRING, &fileSigningCert, 0,
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 	N_("use file signing cert <cert>"),
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 	N_("<cert>") },
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+    { "pkcs11_engine", '\0', POPT_ARG_STRING, &pkcs11Engine, 0,
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+	N_("use pkcs#11 token for fsverity signing key with openssl engine <pkcs11_engine>"),
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+	N_("<pkcs11_engine>") },
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+    { "pkcs11_module", '\0', POPT_ARG_STRING, &pkcs11Module, 0,
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+	N_("use pkcs#11 token for fsverity signing key with openssl module <pkcs11_module>"),
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+	N_("<pkcs11_module>") },
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+    { "pkcs11_keyid", '\0', POPT_ARG_STRING, &pkcs11KeyId, 0,
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+	N_("use pkcs#11 token for fsverity signing key with keyid <pkcs11_keyid>"),
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+	N_("<pkcs11_keyid>") },
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 #endif
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 #if defined(WITH_IMAEVM) || defined(WITH_FSVERITY)
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     { "fskpath", '\0', POPT_ARG_STRING, &fileSigningKey, 0,
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@@ -139,6 +151,15 @@ static int doSign(poptContext optCon, struct rpmSignArgs *sargs)
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     }
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 #ifdef WITH_FSVERITY
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+    if (pkcs11Engine) {
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+    rpmPushMacro(NULL, "_pkcs11_engine", NULL, pkcs11Engine, RMIL_GLOBAL);
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+    }
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+    if (pkcs11Module) {
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+    rpmPushMacro(NULL, "_pkcs11_module", NULL, pkcs11Module, RMIL_GLOBAL);
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+    }
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+    if (pkcs11KeyId) {
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+    rpmPushMacro(NULL, "_pkcs11_keyid", NULL, pkcs11KeyId, RMIL_GLOBAL);
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+    }
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     if (fileSigningCert) {
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 	rpmPushMacro(NULL, "_file_signing_cert", NULL, fileSigningCert, RMIL_GLOBAL);
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     }
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@@ -149,9 +170,9 @@ static int doSign(poptContext optCon, struct rpmSignArgs *sargs)
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     if (flags_sign_files(sargs->signflags)) {
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 	char *fileSigningKeyPassword = NULL;
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-	char *key = rpmExpand("%{?_file_signing_key}", NULL);
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-	if (rstreq(key, "")) {
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-	    fprintf(stderr, _("You must set \"%%_file_signing_key\" in your macro file or on the command line with --fskpath\n"));
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+	char *cert = rpmExpand("%{?_file_signing_cert}", NULL);
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+	if (rstreq(cert, "")) {
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+	    fprintf(stderr, _("You must set \"%%_file_signing_cert\" in your macro file or on the command line with --certpath\n"));
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 	    goto exit;
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 	}
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@@ -166,7 +187,7 @@ static int doSign(poptContext optCon, struct rpmSignArgs *sargs)
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 	    free(fileSigningKeyPassword);
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 	}
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-	free(key);
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+	free(cert);
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     }
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 #endif
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diff --git a/sign/rpmgensig.c b/sign/rpmgensig.c
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index d8c84e9377..cb264679b6 100644
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--- a/sign/rpmgensig.c
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+++ b/sign/rpmgensig.c
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@@ -461,15 +461,56 @@ static rpmRC includeVeritySignatures(FD_t fd, Header *sigp, Header *hdrp)
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     rpmRC rc = RPMRC_OK;
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     char *key = rpmExpand("%{?_file_signing_key}", NULL);
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     char *keypass = rpmExpand("%{?_file_signing_key_password}", NULL);
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+    char *pkcs11_engine = rpmExpand("%{?_pkcs11_engine}", NULL);
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+    char *pkcs11_module = rpmExpand("%{?_pkcs11_module}", NULL);
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+    char *pkcs11_keyid = rpmExpand("%{?_pkcs11_keyid}", NULL);
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     char *cert = rpmExpand("%{?_file_signing_cert}", NULL);
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     char *algorithm = rpmExpand("%{?_verity_algorithm}", NULL);
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     uint16_t algo = 0;
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+    if (rstreq(key, "")) {
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+	free(key);
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+	key = NULL;
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+    }
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+
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+    if (rstreq(pkcs11_engine, "")) {
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+	free(pkcs11_engine);
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+	pkcs11_engine = NULL;
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+    }
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+
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+    if (rstreq(pkcs11_module, "")) {
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+	free(pkcs11_module);
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+	pkcs11_module = NULL;
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+    }
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+
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+    if (rstreq(pkcs11_keyid, "")) {
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+	free(pkcs11_keyid);
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+	pkcs11_keyid = NULL;
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+    }
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+
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     if (rstreq(keypass, "")) {
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 	free(keypass);
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 	keypass = NULL;
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     }
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+    if (key) {
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+        if (pkcs11_engine || pkcs11_module || pkcs11_keyid) {
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+            rpmlog(
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+                RPMLOG_ERR,
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+                _("fsverity signatures require a key specified either by file or by PKCS#11 token, not both\n"));
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+            rc = RPMRC_FAIL;
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+            goto out;
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+        }
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+    } else {
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+        if (!pkcs11_engine || !pkcs11_module) {
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+            rpmlog(
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+                RPMLOG_ERR,
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+                _("fsverity signatures require both PKCS#11 engine and module to use PKCS#11 token\n"));
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+            rc = RPMRC_FAIL;
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+            goto out;
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+        }
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+    }
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+
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     if (algorithm && strlen(algorithm) > 0) {
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 	    algo = libfsverity_find_hash_alg_by_name(algorithm);
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 	    rpmlog(RPMLOG_DEBUG, _("Searching for algorithm %s got %i\n"),
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@@ -481,16 +522,16 @@ static rpmRC includeVeritySignatures(FD_t fd, Header *sigp, Header *hdrp)
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 		    goto out;
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 	    }
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     }
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-    if (key && cert) {
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-	    rc = rpmSignVerity(fd, *sigp, *hdrp, key, keypass, cert, algo);
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-    } else {
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-	rpmlog(RPMLOG_ERR, _("fsverity signatures requires a key and a cert\n"));
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-	rc = RPMRC_FAIL;
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-    }
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+
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+    rc = rpmSignVerity(fd, *sigp, *hdrp, key, keypass,
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+                pkcs11_engine, pkcs11_module, pkcs11_keyid, cert, algo);
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  out:
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     free(keypass);
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     free(key);
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+    free(pkcs11_engine);
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+    free(pkcs11_module);
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+    free(pkcs11_keyid);
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     free(cert);
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     return rc;
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 #else
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diff --git a/sign/rpmsignverity.c b/sign/rpmsignverity.c
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index e6c830cdcb..b7924e7ad1 100644
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--- a/sign/rpmsignverity.c
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+++ b/sign/rpmsignverity.c
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@@ -34,8 +34,9 @@ static int rpmVerityRead(void *opaque, void *buf, size_t size)
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 	return retval;
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 }
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-static char *rpmVeritySignFile(rpmfi fi, size_t *sig_size, char *key,
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-			       char *keypass, char *cert, uint16_t algo)
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+static char *rpmVeritySignFile(rpmfi fi, size_t *sig_size, char *key, char *keypass,
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+			    char *pkcs11_engine, char *pkcs11_module, char *pkcs11_keyid,
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+			    char *cert, uint16_t algo)
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 {
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     struct libfsverity_merkle_tree_params params;
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     struct libfsverity_signature_params sig_params;
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@@ -76,6 +77,9 @@ static char *rpmVeritySignFile(rpmfi fi, size_t *sig_size, char *key,
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     memset(&sig_params, 0, sizeof(struct libfsverity_signature_params));
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     sig_params.keyfile = key;
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+    sig_params.pkcs11_engine = pkcs11_engine;
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+    sig_params.pkcs11_module = pkcs11_module;
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+    sig_params.pkcs11_keyid = pkcs11_keyid;
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     sig_params.certfile = cert;
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     if (libfsverity_sign_digest(digest, &sig_params, &sig, sig_size)) {
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 	rpmlog(RPMLOG_DEBUG, _("failed to sign digest\n"));
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@@ -94,8 +98,9 @@ static char *rpmVeritySignFile(rpmfi fi, size_t *sig_size, char *key,
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     return sig_base64;
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 }
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-rpmRC rpmSignVerity(FD_t fd, Header sigh, Header h, char *key,
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-		    char *keypass, char *cert, uint16_t algo)
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+rpmRC rpmSignVerity(FD_t fd, Header sigh, Header h, char *key, char *keypass,
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+	        char *pkcs11_engine, char *pkcs11_module, char *pkcs11_keyid,
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+	        char *cert, uint16_t algo)
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 {
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     int rc;
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     FD_t gzdi;
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@@ -125,6 +130,9 @@ rpmRC rpmSignVerity(FD_t fd, Header sigh, Header h, char *key,
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     }
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     rpmlog(RPMLOG_DEBUG, _("key: %s\n"), key);
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+    rpmlog(RPMLOG_DEBUG, _("pkcs11_engine: %s\n"), pkcs11_engine);
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+    rpmlog(RPMLOG_DEBUG, _("pkcs11_module: %s\n"), pkcs11_module);
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+    rpmlog(RPMLOG_DEBUG, _("pkcs11_keyid: %s\n"), pkcs11_keyid);
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     rpmlog(RPMLOG_DEBUG, _("cert: %s\n"), cert);
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     compr = headerGetString(h, RPMTAG_PAYLOADCOMPRESSOR);
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@@ -164,16 +172,16 @@ rpmRC rpmSignVerity(FD_t fd, Header sigh, Header h, char *key,
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     while (rpmfiNext(fi) >= 0) {
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 	idx = rpmfiFX(fi);
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-	signatures[idx] = rpmVeritySignFile(fi, &sig_size, key, keypass, cert,
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-					    algo);
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+	signatures[idx] = rpmVeritySignFile(fi, &sig_size, key, keypass, pkcs11_engine,
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+					    pkcs11_module, pkcs11_keyid, cert, algo);
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     }
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     while (rpmfiNext(hfi) >= 0) {
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 	idx = rpmfiFX(hfi);
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 	if (signatures[idx])
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 	    continue;
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-	signatures[idx] = rpmVeritySignFile(hfi, &sig_size, key, keypass, cert,
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-					    algo);
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+	signatures[idx] = rpmVeritySignFile(fi, &sig_size, key, keypass, pkcs11_engine,
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+					    pkcs11_module, pkcs11_keyid, cert, algo);
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     }
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     rpmtdReset(&td);
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diff --git a/sign/rpmsignverity.h b/sign/rpmsignverity.h
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index d869e8d8e8..32d2d6359a 100644
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--- a/sign/rpmsignverity.h
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+++ b/sign/rpmsignverity.h
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@@ -22,12 +22,15 @@ extern "C" {
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  * @param h		package header
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  * @param key		signing key
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  * @param keypass	signing key password
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+ * @param pkcs11_engine		PKCS#11 engine to use PKCS#11 token support for signing key
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+ * @param pkcs11_module		PKCS#11 module to use PKCS#11 token support for signing key
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+ * @param pkcs11_keyid		PKCS#11 key identifier
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  * @param cert		signing cert
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  * @return		RPMRC_OK on success
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  */
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-RPM_GNUC_INTERNAL
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-rpmRC rpmSignVerity(FD_t fd, Header sigh, Header h, char *key,
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-		    char *keypass, char *cert, uint16_t algo);
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+rpmRC rpmSignVerity(FD_t fd, Header sigh, Header h, char *key, char *keypass,
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+		    char *pkcs11_engine, char *pkcs11_module, char *pkcs11_keyid,
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+		    char *cert, uint16_t algo);
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 #ifdef _cplusplus
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 }