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From 2b0dce163a119f5f62eb4428b485f7575f321d6f Mon Sep 17 00:00:00 2001
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From: Petr Mensik <pemensik@redhat.com>
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Date: Mon, 5 Aug 2019 11:54:03 +0200
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Subject: [PATCH] Allow explicit disabling of autodisabled MD5
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Default security policy might include explicitly disabled RSAMD5
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algorithm. Current FIPS code automatically disables in FIPS mode. But if
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RSAMD5 is included in security policy, it fails to start, because that
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algorithm is not recognized. Allow it disabled, but fail on any
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other usage.
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---
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bin/named/server.c | 4 ++--
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lib/bind9/check.c | 4 ++++
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lib/dns/rcode.c | 1 +
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3 files changed, 7 insertions(+), 2 deletions(-)
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diff --git a/bin/named/server.c b/bin/named/server.c
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index ee23f10..22a5c01 100644
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--- a/bin/named/server.c
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+++ b/bin/named/server.c
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@@ -1689,12 +1689,12 @@ disable_algorithms(const cfg_obj_t *disabled, dns_resolver_t *resolver) {
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r.length = strlen(r.base);
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result = dns_secalg_fromtext(&alg, &r);
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- if (result != ISC_R_SUCCESS) {
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+ if (result != ISC_R_SUCCESS && result != ISC_R_DISABLED) {
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uint8_t ui;
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result = isc_parse_uint8(&ui, r.base, 10);
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alg = ui;
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}
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- if (result != ISC_R_SUCCESS) {
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+ if (result != ISC_R_SUCCESS && result != ISC_R_DISABLED) {
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cfg_obj_log(cfg_listelt_value(element), named_g_lctx,
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ISC_LOG_ERROR, "invalid algorithm");
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CHECK(result);
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diff --git a/lib/bind9/check.c b/lib/bind9/check.c
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index f49a346..dbf9ddb 100644
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--- a/lib/bind9/check.c
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+++ b/lib/bind9/check.c
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@@ -317,6 +317,10 @@ disabled_algorithms(const cfg_obj_t *disabled, isc_log_t *logctx) {
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r.length = strlen(r.base);
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tresult = dns_secalg_fromtext(&alg, &r);
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+ if (tresult == ISC_R_DISABLED) {
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+ // Recognize disabled algorithms, disable it explicitly
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+ tresult = ISC_R_SUCCESS;
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+ }
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if (tresult != ISC_R_SUCCESS) {
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cfg_obj_log(cfg_listelt_value(element), logctx,
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ISC_LOG_ERROR, "invalid algorithm '%s'",
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diff --git a/lib/dns/rcode.c b/lib/dns/rcode.c
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index 327248e..78adf63 100644
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--- a/lib/dns/rcode.c
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+++ b/lib/dns/rcode.c
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@@ -152,6 +152,7 @@ static struct tbl rcodes[] = { RCODENAMES ERCODENAMES };
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static struct tbl tsigrcodes[] = { RCODENAMES TSIGRCODENAMES };
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static struct tbl certs[] = { CERTNAMES };
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static struct tbl secalgs[] = { SECALGNAMES };
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+static struct tbl md5_secalgs[] = { MD5_SECALGNAMES };
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static struct tbl secprotos[] = { SECPROTONAMES };
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static struct tbl hashalgs[] = { HASHALGNAMES };
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static struct tbl dsdigests[] = { DSDIGESTNAMES };
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--
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2.21.1
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