rpms/openssl
8
1
Fork 1
Code Issues Pull Requests Releases Activity
1eb7adc383
openssl/0049-Allow-disabling-of-SHA1-signatures.patch
Sahana Prasad 9409bc7044 Rebase to upstream release 3.1.1 
Signed-off-by: Sahana Prasad <sahana@redhat.com>
2023-07-28 15:26:00 +02:00

557 lines
21 KiB
Diff
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

From 51d52096122cc73413d55aac06d5e0641f58ffcb Mon Sep 17 00:00:00 2001
From: Clemens Lang <cllang@redhat.com>
Date: Mon, 21 Feb 2022 17:24:44 +0100
Subject: [PATCH] Allow disabling of SHA1 signatures
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
NOTE: This patch is ported from CentOS 9 / RHEL 9, where it defaults to
denying SHA1 signatures. On Fedora, the default is – for now – to allow
SHA1 signatures.
In order to phase out SHA1 signatures, introduce a new configuration
option in the alg_section named 'rh-allow-sha1-signatures'. This option
defaults to true. If set to false, any signature creation or
verification operations that involve SHA1 as digest will fail.
This also affects TLS, where the signature_algorithms extension of any
ClientHello message sent by OpenSSL will no longer include signatures
with the SHA1 digest if rh-allow-sha1-signatures is false. For servers
that request a client certificate, the same also applies for
CertificateRequest messages sent by them.
For signatures created using the EVP_PKEY API, this is a best-effort
check that will deny signatures in cases where the digest algorithm is
known. This means, for example, that that following steps will still
work:
$> openssl dgst -sha1 -binary -out sha1 infile
$> openssl pkeyutl -inkey key.pem -sign -in sha1 -out sha1sig
$> openssl pkeyutl -inkey key.pem -verify -sigfile sha1sig -in sha1
whereas these will not:
$> openssl dgst -sha1 -binary -out sha1 infile
$> openssl pkeyutl -inkey kem.pem -sign -in sha1 -out sha1sig -pkeyopt digest:sha1
$> openssl pkeyutl -inkey kem.pem -verify -sigfile sha1sig -in sha1 -pkeyopt digest:sha1
This happens because in the first case, OpenSSL's signature
implementation does not know that it is signing a SHA1 hash (it could be
signing arbitrary data).
---
crypto/context.c | 14 ++++
crypto/evp/evp_cnf.c | 13 +++
crypto/evp/m_sigver.c | 79 +++++++++++++++++++
crypto/evp/pmeth_lib.c | 15 ++++
doc/man5/config.pod | 13 +++
include/crypto/context.h | 3 +
include/internal/cryptlib.h | 3 +-
include/internal/sslconf.h | 4 +
providers/common/securitycheck.c | 20 +++++
providers/common/securitycheck_default.c | 9 ++-
providers/implementations/signature/dsa_sig.c | 11 ++-
.../implementations/signature/ecdsa_sig.c | 4 +
providers/implementations/signature/rsa_sig.c | 20 ++++-
ssl/t1_lib.c | 8 ++
util/libcrypto.num | 2 +
15 files changed, 209 insertions(+), 9 deletions(-)
diff --git a/crypto/context.c b/crypto/context.c
index e294ea1512..ab6abf44ab 100644
--- a/crypto/context.c
+++ b/crypto/context.c
@@ -43,6 +43,8 @@ struct ossl_lib_ctx_st {
void *fips_prov;
#endif
+ void *legacy_digest_signatures;
+
unsigned int ischild:1;
};
@@ -171,6 +173,10 @@ static int context_init(OSSL_LIB_CTX *ctx)
goto err;
#endif
+ ctx->legacy_digest_signatures = ossl_ctx_legacy_digest_signatures_new(ctx);
+ if (ctx->legacy_digest_signatures == NULL)
+ goto err;
+
/* Low priority. */
#ifndef FIPS_MODULE
ctx->child_provider = ossl_child_prov_ctx_new(ctx);
@@ -299,6 +305,11 @@ static void context_deinit_objs(OSSL_LIB_CTX *ctx)
}
#endif
+ if (ctx->legacy_digest_signatures != NULL) {
+ ossl_ctx_legacy_digest_signatures_free(ctx->legacy_digest_signatures);
+ ctx->legacy_digest_signatures = NULL;
+ }
+
/* Low priority. */
#ifndef FIPS_MODULE
if (ctx->child_provider != NULL) {
@@ -589,6 +600,9 @@ void *ossl_lib_ctx_get_data(OSSL_LIB_CTX *ctx, int index)
return ctx->fips_prov;
#endif
+ case OSSL_LIB_CTX_LEGACY_DIGEST_SIGNATURES_INDEX:
+ return ctx->legacy_digest_signatures;
+
default:
return NULL;
}
diff --git a/crypto/evp/evp_cnf.c b/crypto/evp/evp_cnf.c
index 0e7fe64cf9..b9d3b6d226 100644
--- a/crypto/evp/evp_cnf.c
+++ b/crypto/evp/evp_cnf.c
@@ -10,6 +10,7 @@
#include <stdio.h>
#include <openssl/crypto.h>
#include "internal/cryptlib.h"
+#include "internal/sslconf.h"
#include <openssl/conf.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
@@ -57,6 +58,18 @@ static int alg_module_init(CONF_IMODULE *md, const CONF *cnf)
ERR_raise(ERR_LIB_EVP, EVP_R_SET_DEFAULT_PROPERTY_FAILURE);
return 0;
}
+ } else if (strcmp(oval->name, "rh-allow-sha1-signatures") == 0) {
+ int m;
+
+ /* Detailed error already reported. */
+ if (!X509V3_get_value_bool(oval, &m))
+ return 0;
+
+ if (!ossl_ctx_legacy_digest_signatures_allowed_set(
+ NCONF_get0_libctx((CONF *)cnf), m > 0, 0)) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_SET_DEFAULT_PROPERTY_FAILURE);
+ return 0;
+ }
} else {
ERR_raise_data(ERR_LIB_EVP, EVP_R_UNKNOWN_OPTION,
"name=%s, value=%s", oval->name, oval->value);
diff --git a/crypto/evp/m_sigver.c b/crypto/evp/m_sigver.c
index 630d339c35..6e4e9f5ae7 100644
--- a/crypto/evp/m_sigver.c
+++ b/crypto/evp/m_sigver.c
@@ -15,6 +15,73 @@
#include "internal/provider.h"
#include "internal/numbers.h" /* includes SIZE_MAX */
#include "evp_local.h"
+#include "crypto/context.h"
+
+typedef struct ossl_legacy_digest_signatures_st {
+ int allowed;
+} OSSL_LEGACY_DIGEST_SIGNATURES;
+
+void ossl_ctx_legacy_digest_signatures_free(void *vldsigs)
+{
+ OSSL_LEGACY_DIGEST_SIGNATURES *ldsigs = vldsigs;
+
+ if (ldsigs != NULL) {
+ OPENSSL_free(ldsigs);
+ }
+}
+
+void *ossl_ctx_legacy_digest_signatures_new(OSSL_LIB_CTX *ctx)
+{
+ OSSL_LEGACY_DIGEST_SIGNATURES* ldsigs = OPENSSL_zalloc(sizeof(OSSL_LEGACY_DIGEST_SIGNATURES));
+ /* Warning: This patch differs from the same patch in CentOS and RHEL here,
+ * because the default on Fedora is to allow SHA-1 and support disabling
+ * it, while CentOS/RHEL disable it by default and allow enabling it. */
+ ldsigs->allowed = 1;
+ return ldsigs;
+}
+
+static OSSL_LEGACY_DIGEST_SIGNATURES *ossl_ctx_legacy_digest_signatures(
+ OSSL_LIB_CTX *libctx, int loadconfig)
+{
+#ifndef FIPS_MODULE
+ if (loadconfig && !OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL))
+ return NULL;
+#endif
+
+ return ossl_lib_ctx_get_data(libctx, OSSL_LIB_CTX_LEGACY_DIGEST_SIGNATURES_INDEX);
+}
+
+int ossl_ctx_legacy_digest_signatures_allowed(OSSL_LIB_CTX *libctx, int loadconfig)
+{
+ OSSL_LEGACY_DIGEST_SIGNATURES *ldsigs
+ = ossl_ctx_legacy_digest_signatures(libctx, loadconfig);
+
+#ifndef FIPS_MODULE
+ if (ossl_safe_getenv("OPENSSL_ENABLE_SHA1_SIGNATURES") != NULL)
+ /* used in tests */
+ return 1;
+#endif
+
+ /* Warning: This patch differs from the same patch in CentOS and RHEL here,
+ * because the default on Fedora is to allow SHA-1 and support disabling
+ * it, while CentOS/RHEL disable it by default and allow enabling it. */
+ return ldsigs != NULL ? ldsigs->allowed : 1;
+}
+
+int ossl_ctx_legacy_digest_signatures_allowed_set(OSSL_LIB_CTX *libctx, int allow,
+ int loadconfig)
+{
+ OSSL_LEGACY_DIGEST_SIGNATURES *ldsigs
+ = ossl_ctx_legacy_digest_signatures(libctx, loadconfig);
+
+ if (ldsigs == NULL) {
+ ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ ldsigs->allowed = allow;
+ return 1;
+}
#ifndef FIPS_MODULE
@@ -251,6 +318,18 @@ static int do_sigver_init(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
}
}
+ if (ctx->reqdigest != NULL
+ && !EVP_PKEY_is_a(locpctx->pkey, SN_hmac)
+ && !EVP_PKEY_is_a(locpctx->pkey, SN_tls1_prf)
+ && !EVP_PKEY_is_a(locpctx->pkey, SN_hkdf)) {
+ int mdnid = EVP_MD_nid(ctx->reqdigest);
+ if (!ossl_ctx_legacy_digest_signatures_allowed(locpctx->libctx, 0)
+ && (mdnid == NID_sha1 || mdnid == NID_md5_sha1)) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_DIGEST);
+ goto err;
+ }
+ }
+
if (ver) {
if (signature->digest_verify_init == NULL) {
ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
diff --git a/crypto/evp/pmeth_lib.c b/crypto/evp/pmeth_lib.c
index ce6e1a1ccb..003926247b 100644
--- a/crypto/evp/pmeth_lib.c
+++ b/crypto/evp/pmeth_lib.c
@@ -33,6 +33,7 @@
#include "internal/ffc.h"
#include "internal/numbers.h"
#include "internal/provider.h"
+#include "internal/sslconf.h"
#include "evp_local.h"
#ifndef FIPS_MODULE
@@ -958,6 +959,20 @@ static int evp_pkey_ctx_set_md(EVP_PKEY_CTX *ctx, const EVP_MD *md,
return -2;
}
+ if (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
+ && md != NULL
+ && ctx->pkey != NULL
+ && !EVP_PKEY_is_a(ctx->pkey, SN_hmac)
+ && !EVP_PKEY_is_a(ctx->pkey, SN_tls1_prf)
+ && !EVP_PKEY_is_a(ctx->pkey, SN_hkdf)) {
+ int mdnid = EVP_MD_nid(md);
+ if ((mdnid == NID_sha1 || mdnid == NID_md5_sha1)
+ && !ossl_ctx_legacy_digest_signatures_allowed(ctx->libctx, 0)) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_DIGEST);
+ return -1;
+ }
+ }
+
if (fallback)
return EVP_PKEY_CTX_ctrl(ctx, -1, op, ctrl, 0, (void *)(md));
diff --git a/doc/man5/config.pod b/doc/man5/config.pod
index 8d312c661f..979683e0a5 100644
--- a/doc/man5/config.pod
+++ b/doc/man5/config.pod
@@ -296,6 +296,19 @@ Within the algorithm properties section, the following names have meaning:
The value may be anything that is acceptable as a property query
string for EVP_set_default_properties().
+=item B<rh-allow-sha1-signatures>
+
+The value is a boolean that can be B<yes> or B<no>. If the value is not set,
+it behaves as if it was set to B<yes>.
+
+When set to B<no>, any attempt to create or verify a signature with a SHA1
+digest will fail. To test whether your software will work with future versions
+of OpenSSL, set this option to B<no>. This setting also affects TLS, where
+signature algorithms that use SHA1 as digest will no longer be supported if
+this option is set to B<no>. Because TLS 1.1 or lower use MD5-SHA1 as
+pseudorandom function (PRF) to derive key material, disabling
+B<rh-allow-sha1-signatures> requires the use of TLS 1.2 or newer.
+
=item B<fips_mode> (deprecated)
The value is a boolean that can be B<yes> or B<no>. If the value is
diff --git a/include/crypto/context.h b/include/crypto/context.h
index cc06c71be8..e9f74a414d 100644
--- a/include/crypto/context.h
+++ b/include/crypto/context.h
@@ -39,3 +39,6 @@ void ossl_rand_crng_ctx_free(void *);
void ossl_thread_event_ctx_free(void *);
void ossl_fips_prov_ossl_ctx_free(void *);
void ossl_release_default_drbg_ctx(void);
+
+void *ossl_ctx_legacy_digest_signatures_new(OSSL_LIB_CTX *);
+void ossl_ctx_legacy_digest_signatures_free(void *);
diff --git a/include/internal/cryptlib.h b/include/internal/cryptlib.h
index ac50eb3bbd..3b115cc7df 100644
--- a/include/internal/cryptlib.h
+++ b/include/internal/cryptlib.h
@@ -168,7 +168,8 @@ typedef struct ossl_ex_data_global_st {
# define OSSL_LIB_CTX_PROVIDER_CONF_INDEX 16
# define OSSL_LIB_CTX_BIO_CORE_INDEX 17
# define OSSL_LIB_CTX_CHILD_PROVIDER_INDEX 18
-# define OSSL_LIB_CTX_MAX_INDEXES 19
+# define OSSL_LIB_CTX_LEGACY_DIGEST_SIGNATURES_INDEX 19
+# define OSSL_LIB_CTX_MAX_INDEXES 20
OSSL_LIB_CTX *ossl_lib_ctx_get_concrete(OSSL_LIB_CTX *ctx);
int ossl_lib_ctx_is_default(OSSL_LIB_CTX *ctx);
diff --git a/include/internal/sslconf.h b/include/internal/sslconf.h
index fd7f7e3331..05464b0655 100644
--- a/include/internal/sslconf.h
+++ b/include/internal/sslconf.h
@@ -18,4 +18,8 @@ int conf_ssl_name_find(const char *name, size_t *idx);
void conf_ssl_get_cmd(const SSL_CONF_CMD *cmd, size_t idx, char **cmdstr,
char **arg);
+/* Methods to support disabling all signatures with legacy digests */
+int ossl_ctx_legacy_digest_signatures_allowed(OSSL_LIB_CTX *libctx, int loadconfig);
+int ossl_ctx_legacy_digest_signatures_allowed_set(OSSL_LIB_CTX *libctx, int allow,
+ int loadconfig);
#endif
diff --git a/providers/common/securitycheck.c b/providers/common/securitycheck.c
index 699ada7c52..e534ad0a5f 100644
--- a/providers/common/securitycheck.c
+++ b/providers/common/securitycheck.c
@@ -19,6 +19,7 @@
#include <openssl/core_names.h>
#include <openssl/obj_mac.h>
#include "prov/securitycheck.h"
+#include "internal/sslconf.h"
/*
* FIPS requires a minimum security strength of 112 bits (for encryption or
@@ -235,6 +236,15 @@ int ossl_digest_get_approved_nid_with_sha1(OSSL_LIB_CTX *ctx, const EVP_MD *md,
mdnid = -1; /* disallowed by security checks */
}
# endif /* OPENSSL_NO_FIPS_SECURITYCHECKS */
+
+#ifndef FIPS_MODULE
+ if (!ossl_ctx_legacy_digest_signatures_allowed(ctx, 0))
+ /* SHA1 is globally disabled, check whether we want to locally allow
+ * it. */
+ if (mdnid == NID_sha1 && !sha1_allowed)
+ mdnid = -1;
+#endif
+
return mdnid;
}
@@ -244,5 +254,15 @@ int ossl_digest_is_allowed(OSSL_LIB_CTX *ctx, const EVP_MD *md)
if (ossl_securitycheck_enabled(ctx))
return ossl_digest_get_approved_nid(md) != NID_undef;
# endif /* OPENSSL_NO_FIPS_SECURITYCHECKS */
+
+#ifndef FIPS_MODULE
+ {
+ int mdnid = EVP_MD_nid(md);
+ if ((mdnid == NID_sha1 || mdnid == NID_md5_sha1)
+ && !ossl_ctx_legacy_digest_signatures_allowed(ctx, 0))
+ return 0;
+ }
+#endif
+
return 1;
}
diff --git a/providers/common/securitycheck_default.c b/providers/common/securitycheck_default.c
index 246323493e..2ca7a59f39 100644
--- a/providers/common/securitycheck_default.c
+++ b/providers/common/securitycheck_default.c
@@ -15,6 +15,7 @@
#include <openssl/obj_mac.h>
#include "prov/securitycheck.h"
#include "internal/nelem.h"
+#include "internal/sslconf.h"
/* Disable the security checks in the default provider */
int ossl_securitycheck_enabled(OSSL_LIB_CTX *libctx)
@@ -29,9 +30,10 @@ int ossl_tls1_prf_ems_check_enabled(OSSL_LIB_CTX *libctx)
}
int ossl_digest_rsa_sign_get_md_nid(OSSL_LIB_CTX *ctx, const EVP_MD *md,
- ossl_unused int sha1_allowed)
+ int sha1_allowed)
{
int mdnid;
+ int ldsigs_allowed;
static const OSSL_ITEM name_to_nid[] = {
{ NID_md5, OSSL_DIGEST_NAME_MD5 },
@@ -42,8 +44,11 @@ int ossl_digest_rsa_sign_get_md_nid(OSSL_LIB_CTX *ctx, const EVP_MD *md,
{ NID_ripemd160, OSSL_DIGEST_NAME_RIPEMD160 },
};
- mdnid = ossl_digest_get_approved_nid_with_sha1(ctx, md, 1);
+ ldsigs_allowed = ossl_ctx_legacy_digest_signatures_allowed(ctx, 0);
+ mdnid = ossl_digest_get_approved_nid_with_sha1(ctx, md, sha1_allowed || ldsigs_allowed);
if (mdnid == NID_undef)
mdnid = ossl_digest_md_to_nid(md, name_to_nid, OSSL_NELEM(name_to_nid));
+ if (mdnid == NID_md5_sha1 && !ldsigs_allowed)
+ mdnid = -1;
return mdnid;
}
diff --git a/providers/implementations/signature/dsa_sig.c b/providers/implementations/signature/dsa_sig.c
index 70d0ea5d24..3c482e0181 100644
--- a/providers/implementations/signature/dsa_sig.c
+++ b/providers/implementations/signature/dsa_sig.c
@@ -123,12 +123,17 @@ static int dsa_setup_md(PROV_DSA_CTX *ctx,
mdprops = ctx->propq;
if (mdname != NULL) {
- int sha1_allowed = (ctx->operation != EVP_PKEY_OP_SIGN);
WPACKET pkt;
EVP_MD *md = EVP_MD_fetch(ctx->libctx, mdname, mdprops);
- int md_nid = ossl_digest_get_approved_nid_with_sha1(ctx->libctx, md,
- sha1_allowed);
+ int md_nid;
size_t mdname_len = strlen(mdname);
+#ifdef FIPS_MODULE
+ int sha1_allowed = (ctx->operation != EVP_PKEY_OP_SIGN);
+#else
+ int sha1_allowed = 0;
+#endif
+ md_nid = ossl_digest_get_approved_nid_with_sha1(ctx->libctx, md,
+ sha1_allowed);
if (md == NULL || md_nid < 0) {
if (md == NULL)
diff --git a/providers/implementations/signature/ecdsa_sig.c b/providers/implementations/signature/ecdsa_sig.c
index 865d49d100..99b228e82c 100644
--- a/providers/implementations/signature/ecdsa_sig.c
+++ b/providers/implementations/signature/ecdsa_sig.c
@@ -237,7 +237,11 @@ static int ecdsa_setup_md(PROV_ECDSA_CTX *ctx, const char *mdname,
"%s could not be fetched", mdname);
return 0;
}
+#ifdef FIPS_MODULE
sha1_allowed = (ctx->operation != EVP_PKEY_OP_SIGN);
+#else
+ sha1_allowed = 0;
+#endif
md_nid = ossl_digest_get_approved_nid_with_sha1(ctx->libctx, md,
sha1_allowed);
if (md_nid < 0) {
diff --git a/providers/implementations/signature/rsa_sig.c b/providers/implementations/signature/rsa_sig.c
index cd5de6bd51..25a51df878 100644
--- a/providers/implementations/signature/rsa_sig.c
+++ b/providers/implementations/signature/rsa_sig.c
@@ -25,6 +25,7 @@
#include "internal/cryptlib.h"
#include "internal/nelem.h"
#include "internal/sizes.h"
+#include "internal/sslconf.h"
#include "crypto/rsa.h"
#include "prov/providercommon.h"
#include "prov/implementations.h"
@@ -33,6 +34,7 @@
#include "prov/securitycheck.h"
#define RSA_DEFAULT_DIGEST_NAME OSSL_DIGEST_NAME_SHA1
+#define RSA_DEFAULT_DIGEST_NAME_NONLEGACY OSSL_DIGEST_NAME_SHA2_256
static OSSL_FUNC_signature_newctx_fn rsa_newctx;
static OSSL_FUNC_signature_sign_init_fn rsa_sign_init;
@@ -302,10 +304,15 @@ static int rsa_setup_md(PROV_RSA_CTX *ctx, const char *mdname,
if (mdname != NULL) {
EVP_MD *md = EVP_MD_fetch(ctx->libctx, mdname, mdprops);
+ int md_nid;
+ size_t mdname_len = strlen(mdname);
+#ifdef FIPS_MODULE
int sha1_allowed = (ctx->operation != EVP_PKEY_OP_SIGN);
- int md_nid = ossl_digest_rsa_sign_get_md_nid(ctx->libctx, md,
+#else
+ int sha1_allowed = 0;
+#endif
+ md_nid = ossl_digest_rsa_sign_get_md_nid(ctx->libctx, md,
sha1_allowed);
- size_t mdname_len = strlen(mdname);
if (md == NULL
|| md_nid <= 0
@@ -1370,8 +1377,15 @@ static int rsa_set_ctx_params(void *vprsactx, const OSSL_PARAM params[])
prsactx->pad_mode = pad_mode;
if (prsactx->md == NULL && pmdname == NULL
- && pad_mode == RSA_PKCS1_PSS_PADDING)
+ && pad_mode == RSA_PKCS1_PSS_PADDING) {
pmdname = RSA_DEFAULT_DIGEST_NAME;
+#ifndef FIPS_MODULE
+ if (!ossl_ctx_legacy_digest_signatures_allowed(prsactx->libctx, 0)) {
+ pmdname = RSA_DEFAULT_DIGEST_NAME_NONLEGACY;
+ }
+#endif
+ }
+
if (pmgf1mdname != NULL
&& !rsa_setup_mgf1_md(prsactx, pmgf1mdname, pmgf1mdprops))
diff --git a/ssl/t1_lib.c b/ssl/t1_lib.c
index e6f4bcc045..8bc550ea5b 100644
--- a/ssl/t1_lib.c
+++ b/ssl/t1_lib.c
@@ -20,6 +20,7 @@
#include <openssl/bn.h>
#include <openssl/provider.h>
#include <openssl/param_build.h>
+#include "internal/sslconf.h"
#include "internal/nelem.h"
#include "internal/sizes.h"
#include "internal/tlsgroups.h"
@@ -1151,11 +1152,13 @@ int ssl_setup_sig_algs(SSL_CTX *ctx)
= OPENSSL_malloc(sizeof(*lu) * OSSL_NELEM(sigalg_lookup_tbl));
EVP_PKEY *tmpkey = EVP_PKEY_new();
int ret = 0;
+ int ldsigs_allowed;
if (cache == NULL || tmpkey == NULL)
goto err;
ERR_set_mark();
+ ldsigs_allowed = ossl_ctx_legacy_digest_signatures_allowed(ctx->libctx, 0);
for (i = 0, lu = sigalg_lookup_tbl;
i < OSSL_NELEM(sigalg_lookup_tbl); lu++, i++) {
EVP_PKEY_CTX *pctx;
@@ -1175,6 +1178,11 @@ int ssl_setup_sig_algs(SSL_CTX *ctx)
cache[i].enabled = 0;
continue;
}
+ if ((lu->hash == NID_sha1 || lu->hash == NID_md5_sha1)
+ && !ldsigs_allowed) {
+ cache[i].enabled = 0;
+ continue;
+ }
if (!EVP_PKEY_set_type(tmpkey, lu->sig)) {
cache[i].enabled = 0;
diff --git a/util/libcrypto.num b/util/libcrypto.num
index 9cb8a4dda2..feb660d030 100644
--- a/util/libcrypto.num
+++ b/util/libcrypto.num
@@ -5436,3 +5436,5 @@ EVP_CIPHER_CTX_dup 5563 3_1_0 EXIST::FUNCTION:
BN_are_coprime 5564 3_1_0 EXIST::FUNCTION:
OSSL_CMP_MSG_update_recipNonce 5565 3_0_9 EXIST::FUNCTION:CMP
ossl_safe_getenv ? 3_0_0 EXIST::FUNCTION:
+ossl_ctx_legacy_digest_signatures_allowed ? 3_0_1 EXIST::FUNCTION:
+ossl_ctx_legacy_digest_signatures_allowed_set ? 3_0_1 EXIST::FUNCTION:
--
2.40.1
Reference in New Issue View Git Blame Copy Permalink