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Make the sign, dh, ecdh processes FIPS compliant

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FIPS compliancy can be stated by using only compliant crypto
functions. This is achieved by using EVP API from openssl 3.0
version. The solution uses a non-intrusive approach - instead
of rewriting everything to use EVP API it converts the data
to it at the critical places.

Signed-off-by: Norbert Pocs <npocs@redhat.com>
This commit is contained in:
Norbert Pocs 2023-04-13 15:12:10 +02:00
parent 745da74ea2
commit b63272d9eb
4 changed files with 954 additions and 1 deletions
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266
openssh-9.0p1-evp-fips-dh.patch Normal file
View File

@ -0,0 +1,266 @@
diff --color -ru -x regress -x autom4te.cache -x '*.o' -x '*.lo' -x Makefile -x config.status -x configure~ -x configure.ac ../../openssh-8.7p1/dh.c ./dh.c
--- ../../openssh-8.7p1/dh.c 2023-03-01 14:26:52.504445780 +0100
+++ ./dh.c 2023-03-01 14:20:09.823193384 +0100
@@ -37,6 +37,9 @@
#include <openssl/bn.h>
#include <openssl/dh.h>
#include <openssl/fips.h>
+#include <openssl/evp.h>
+#include <openssl/core_names.h>
+#include <openssl/param_build.h>
#include "dh.h"
#include "pathnames.h"
@@ -289,10 +292,15 @@
int
dh_gen_key(DH *dh, int need)
{
- int pbits;
- const BIGNUM *dh_p, *pub_key;
+ const BIGNUM *dh_p, *dh_g;
+ BIGNUM *pub_key = NULL, *priv_key = NULL;
+ EVP_PKEY *pkey = NULL;
+ EVP_PKEY_CTX *ctx = NULL;
+ OSSL_PARAM_BLD *param_bld = NULL;
+ OSSL_PARAM *params = NULL;
+ int pbits, r = 0;
- DH_get0_pqg(dh, &dh_p, NULL, NULL);
+ DH_get0_pqg(dh, &dh_p, NULL, &dh_g);
if (need < 0 || dh_p == NULL ||
(pbits = BN_num_bits(dh_p)) <= 0 ||
@@ -300,19 +308,85 @@
return SSH_ERR_INVALID_ARGUMENT;
if (need < 256)
need = 256;
+
+ if ((param_bld = OSSL_PARAM_BLD_new()) == NULL ||
+ (ctx = EVP_PKEY_CTX_new_from_name(NULL, "DH", NULL)) == NULL) {
+ OSSL_PARAM_BLD_free(param_bld);
+ return SSH_ERR_ALLOC_FAIL;
+ }
+
+ if (OSSL_PARAM_BLD_push_BN(param_bld,
+ OSSL_PKEY_PARAM_FFC_P, dh_p) != 1 ||
+ OSSL_PARAM_BLD_push_BN(param_bld,
+ OSSL_PKEY_PARAM_FFC_G, dh_g) != 1) {
+ error_f("Could not set p,q,g parameters");
+ r = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
/*
* Pollard Rho, Big step/Little Step attacks are O(sqrt(n)),
* so double requested need here.
*/
- if (!DH_set_length(dh, MINIMUM(need * 2, pbits - 1)))
- return SSH_ERR_LIBCRYPTO_ERROR;
-
- if (DH_generate_key(dh) == 0)
- return SSH_ERR_LIBCRYPTO_ERROR;
- DH_get0_key(dh, &pub_key, NULL);
- if (!dh_pub_is_valid(dh, pub_key))
- return SSH_ERR_INVALID_FORMAT;
- return 0;
+ if (OSSL_PARAM_BLD_push_int(param_bld,
+ OSSL_PKEY_PARAM_DH_PRIV_LEN,
+ MINIMUM(need * 2, pbits - 1)) != 1 ||
+ (params = OSSL_PARAM_BLD_to_param(param_bld)) == NULL) {
+ r = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+ if (EVP_PKEY_fromdata_init(ctx) != 1) {
+ r = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+ if (EVP_PKEY_fromdata(ctx, &pkey,
+ EVP_PKEY_KEY_PARAMETERS, params) != 1) {
+ error_f("Failed key generation");
+ r = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+
+ /* reuse context for key generation */
+ EVP_PKEY_CTX_free(ctx);
+ ctx = NULL;
+
+ if ((ctx = EVP_PKEY_CTX_new_from_pkey(NULL, pkey, NULL)) == NULL ||
+ EVP_PKEY_keygen_init(ctx) != 1) {
+ error_f("Could not create or init context");
+ r = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+ if (EVP_PKEY_generate(ctx, &pkey) != 1) {
+ error_f("Could not generate keys");
+ r = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+ if (EVP_PKEY_public_check(ctx) != 1) {
+ error_f("The public key is incorrect");
+ r = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+
+ if (EVP_PKEY_get_bn_param(pkey, OSSL_PKEY_PARAM_PUB_KEY,
+ &pub_key) != 1 ||
+ EVP_PKEY_get_bn_param(pkey, OSSL_PKEY_PARAM_PRIV_KEY,
+ &priv_key) != 1 ||
+ DH_set0_key(dh, pub_key, priv_key) != 1) {
+ error_f("Could not set pub/priv keys to DH struct");
+ r = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+
+ /* transferred */
+ pub_key = NULL;
+ priv_key = NULL;
+out:
+ OSSL_PARAM_free(params);
+ OSSL_PARAM_BLD_free(param_bld);
+ EVP_PKEY_CTX_free(ctx);
+ EVP_PKEY_free(pkey);
+ BN_clear_free(pub_key);
+ BN_clear_free(priv_key);
+ return r;
}
DH *
diff --color -ru -x regress -x autom4te.cache -x '*.o' -x '*.lo' -x Makefile -x config.status -x configure~ -x configure.ac ../../openssh-8.7p1/kex.c ./kex.c
--- ../../openssh-8.7p1/kex.c 2023-03-01 14:26:52.508445832 +0100
+++ ./kex.c 2023-02-28 14:09:27.164743771 +0100
@@ -1602,3 +1602,47 @@
return r;
}
+#ifdef WITH_OPENSSL
+/*
+ * Creates an EVP_PKEY from the given parameters and keys.
+ * The private key can be omitted.
+ */
+int
+kex_create_evp_dh(EVP_PKEY **pkey, const BIGNUM *p, const BIGNUM *q,
+ const BIGNUM *g, const BIGNUM *pub, const BIGNUM *priv)
+{
+ OSSL_PARAM_BLD *param_bld = NULL;
+ EVP_PKEY_CTX *ctx = NULL;
+ int r = 0;
+
+ /* create EVP_PKEY-DH key */
+ if ((ctx = EVP_PKEY_CTX_new_from_name(NULL, "DH", NULL)) == NULL ||
+ (param_bld = OSSL_PARAM_BLD_new()) == NULL) {
+ error_f("EVP_PKEY_CTX or PARAM_BLD init failed");
+ r = SSH_ERR_ALLOC_FAIL;
+ goto out;
+ }
+ if (OSSL_PARAM_BLD_push_BN(param_bld, OSSL_PKEY_PARAM_FFC_P, p) != 1 ||
+ OSSL_PARAM_BLD_push_BN(param_bld, OSSL_PKEY_PARAM_FFC_Q, q) != 1 ||
+ OSSL_PARAM_BLD_push_BN(param_bld, OSSL_PKEY_PARAM_FFC_G, g) != 1 ||
+ OSSL_PARAM_BLD_push_BN(param_bld,
+ OSSL_PKEY_PARAM_PUB_KEY, pub) != 1) {
+ error_f("Failed pushing params to OSSL_PARAM_BLD");
+ r = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+ if (priv != NULL &&
+ OSSL_PARAM_BLD_push_BN(param_bld,
+ OSSL_PKEY_PARAM_PRIV_KEY, priv) != 1) {
+ error_f("Failed pushing private key to OSSL_PARAM_BLD");
+ r = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+ if ((*pkey = sshkey_create_evp(param_bld, ctx)) == NULL)
+ r = SSH_ERR_LIBCRYPTO_ERROR;
+out:
+ OSSL_PARAM_BLD_free(param_bld);
+ EVP_PKEY_CTX_free(ctx);
+ return r;
+}
+#endif /* WITH_OPENSSL */
diff --color -ru -x regress -x autom4te.cache -x '*.o' -x '*.lo' -x Makefile -x config.status -x configure~ -x configure.ac ../../openssh-8.7p1/kexdh.c ./kexdh.c
--- ../../openssh-8.7p1/kexdh.c 2023-03-01 14:26:52.448445050 +0100
+++ ./kexdh.c 2023-02-28 14:05:00.700902124 +0100
@@ -35,6 +35,9 @@
#include "openbsd-compat/openssl-compat.h"
#include <openssl/dh.h>
+#include <openssl/evp.h>
+#include <openssl/core_names.h>
+#include <openssl/param_build.h>
#include "sshkey.h"
#include "kex.h"
@@ -83,6 +86,9 @@
kex_dh_compute_key(struct kex *kex, BIGNUM *dh_pub, struct sshbuf *out)
{
BIGNUM *shared_secret = NULL;
+ const BIGNUM *pub, *priv, *p, *q, *g;
+ EVP_PKEY *pkey = NULL, *dh_pkey = NULL;
+ EVP_PKEY_CTX *ctx = NULL;
u_char *kbuf = NULL;
size_t klen = 0;
int kout, r;
@@ -106,18 +112,39 @@
r = SSH_ERR_ALLOC_FAIL;
goto out;
}
- if ((kout = DH_compute_key(kbuf, dh_pub, kex->dh)) < 0 ||
- BN_bin2bn(kbuf, kout, shared_secret) == NULL) {
+
+ DH_get0_key(kex->dh, &pub, &priv);
+ DH_get0_pqg(kex->dh, &p, &q, &g);
+ /* import key */
+ kex_create_evp_dh(&pkey, p, q, g, pub, priv);
+ /* import peer key
+ * the parameters should be the same as with pkey
+ */
+ kex_create_evp_dh(&dh_pkey, p, q, g, dh_pub, NULL);
+
+ if ((ctx = EVP_PKEY_CTX_new_from_pkey(NULL, pkey, NULL)) == NULL) {
+ error_f("Could not init EVP_PKEY_CTX for dh");
+ r = SSH_ERR_ALLOC_FAIL;
+ goto out;
+ }
+ if (EVP_PKEY_derive_init(ctx) != 1 ||
+ EVP_PKEY_derive_set_peer(ctx, dh_pkey) != 1 ||
+ EVP_PKEY_derive(ctx, kbuf, &klen) != 1 ||
+ BN_bin2bn(kbuf, klen, shared_secret) == NULL) {
+ error_f("Could not derive key");
r = SSH_ERR_LIBCRYPTO_ERROR;
goto out;
}
#ifdef DEBUG_KEXDH
- dump_digest("shared secret", kbuf, kout);
+ dump_digest("shared secret", kbuf, klen);
#endif
r = sshbuf_put_bignum2(out, shared_secret);
out:
freezero(kbuf, klen);
BN_clear_free(shared_secret);
+ EVP_PKEY_free(pkey);
+ EVP_PKEY_free(dh_pkey);
+ EVP_PKEY_CTX_free(ctx);
return r;
}
diff --color -ru -x regress -x autom4te.cache -x '*.o' -x '*.lo' -x Makefile -x config.status -x configure~ -x configure.ac ../../openssh-8.7p1/kex.h ./kex.h
--- ../../openssh-8.7p1/kex.h 2023-03-01 14:26:52.508445832 +0100
+++ ./kex.h 2023-02-28 13:16:49.811047554 +0100
@@ -33,6 +33,9 @@
# include <openssl/bn.h>
# include <openssl/dh.h>
# include <openssl/ecdsa.h>
+# include <openssl/evp.h>
+# include <openssl/core_names.h>
+# include <openssl/param_build.h>
# ifdef OPENSSL_HAS_ECC
# include <openssl/ec.h>
# else /* OPENSSL_HAS_ECC */
@@ -278,6 +281,8 @@
const u_char pub[CURVE25519_SIZE], struct sshbuf *out, int)
__attribute__((__bounded__(__minbytes__, 1, CURVE25519_SIZE)))
__attribute__((__bounded__(__minbytes__, 2, CURVE25519_SIZE)));
+int kex_create_evp_dh(EVP_PKEY **, const BIGNUM *, const BIGNUM *,
+ const BIGNUM *, const BIGNUM *, const BIGNUM *);
#if defined(DEBUG_KEX) || defined(DEBUG_KEXDH) || defined(DEBUG_KEXECDH)
void dump_digest(const char *, const u_char *, int);

207
openssh-9.0p1-evp-fips-ecdh.patch Normal file
View File

@ -0,0 +1,207 @@
diff --color -ru -x regress -x autom4te.cache -x '*.o' -x '*.lo' -x Makefile -x config.status -x configure~ -x configure.ac ../openssh-8.7p1/kexecdh.c ./kexecdh.c
--- ../openssh-8.7p1/kexecdh.c 2021-08-20 06:03:49.000000000 +0200
+++ ./kexecdh.c 2023-04-13 14:30:14.882449593 +0200
@@ -35,17 +35,57 @@
#include <signal.h>
#include <openssl/ecdh.h>
+#include <openssl/evp.h>
+#include <openssl/core_names.h>
+#include <openssl/param_build.h>
+#include <openssl/err.h>
#include "sshkey.h"
#include "kex.h"
#include "sshbuf.h"
#include "digest.h"
#include "ssherr.h"
+#include "log.h"
static int
kex_ecdh_dec_key_group(struct kex *, const struct sshbuf *, EC_KEY *key,
const EC_GROUP *, struct sshbuf **);
+static EC_KEY *
+generate_ec_keys(int ec_nid)
+{
+ EC_KEY *client_key = NULL;
+ EVP_PKEY *pkey = NULL;
+ EVP_PKEY_CTX *ctx = NULL;
+ OSSL_PARAM_BLD *param_bld = NULL;
+ OSSL_PARAM *params = NULL;
+ const char *group_name;
+
+ if ((ctx = EVP_PKEY_CTX_new_from_name(NULL, "EC", NULL)) == NULL ||
+ (param_bld = OSSL_PARAM_BLD_new()) == NULL)
+ goto out;
+ if ((group_name = OSSL_EC_curve_nid2name(ec_nid)) == NULL ||
+ OSSL_PARAM_BLD_push_utf8_string(param_bld,
+ OSSL_PKEY_PARAM_GROUP_NAME, group_name, 0) != 1 ||
+ (params = OSSL_PARAM_BLD_to_param(param_bld)) == NULL) {
+ error_f("Could not create OSSL_PARAM");
+ goto out;
+ }
+ if (EVP_PKEY_keygen_init(ctx) != 1 ||
+ EVP_PKEY_CTX_set_params(ctx, params) != 1 ||
+ EVP_PKEY_generate(ctx, &pkey) != 1 ||
+ (client_key = EVP_PKEY_get1_EC_KEY(pkey)) == NULL) {
+ error_f("Could not generate ec keys");
+ goto out;
+ }
+out:
+ EVP_PKEY_free(pkey);
+ EVP_PKEY_CTX_free(ctx);
+ OSSL_PARAM_BLD_free(param_bld);
+ OSSL_PARAM_free(params);
+ return client_key;
+}
+
int
kex_ecdh_keypair(struct kex *kex)
{
@@ -55,11 +95,7 @@
struct sshbuf *buf = NULL;
int r;
- if ((client_key = EC_KEY_new_by_curve_name(kex->ec_nid)) == NULL) {
- r = SSH_ERR_ALLOC_FAIL;
- goto out;
- }
- if (EC_KEY_generate_key(client_key) != 1) {
+ if ((client_key = generate_ec_keys(kex->ec_nid)) == NULL) {
r = SSH_ERR_LIBCRYPTO_ERROR;
goto out;
}
@@ -101,11 +137,7 @@
*server_blobp = NULL;
*shared_secretp = NULL;
- if ((server_key = EC_KEY_new_by_curve_name(kex->ec_nid)) == NULL) {
- r = SSH_ERR_ALLOC_FAIL;
- goto out;
- }
- if (EC_KEY_generate_key(server_key) != 1) {
+ if ((server_key = generate_ec_keys(kex->ec_nid)) == NULL) {
r = SSH_ERR_LIBCRYPTO_ERROR;
goto out;
}
@@ -140,11 +172,21 @@
{
struct sshbuf *buf = NULL;
BIGNUM *shared_secret = NULL;
- EC_POINT *dh_pub = NULL;
- u_char *kbuf = NULL;
- size_t klen = 0;
+ EVP_PKEY_CTX *ctx = NULL;
+ EVP_PKEY *pkey = NULL, *dh_pkey = NULL;
+ OSSL_PARAM_BLD *param_bld = NULL;
+ OSSL_PARAM *params = NULL;
+ u_char *kbuf = NULL, *pub = NULL;
+ size_t klen = 0, publen;
+ const char *group_name;
int r;
+ /* import EC_KEY to EVP_PKEY */
+ if ((r = ssh_create_evp_ec(key, kex->ec_nid, &pkey)) != 0) {
+ error_f("Could not create EVP_PKEY");
+ goto out;
+ }
+
*shared_secretp = NULL;
if ((buf = sshbuf_new()) == NULL) {
@@ -153,45 +195,82 @@
}
if ((r = sshbuf_put_stringb(buf, ec_blob)) != 0)
goto out;
- if ((dh_pub = EC_POINT_new(group)) == NULL) {
+
+ /* the public key is in the buffer in octet string UNCOMPRESSED
+ * format. See sshbuf_put_ec */
+ if ((r = sshbuf_get_string(buf, &pub, &publen)) != 0)
+ goto out;
+ sshbuf_reset(buf);
+ if ((ctx = EVP_PKEY_CTX_new_from_pkey(NULL, pkey, NULL)) == NULL ||
+ (param_bld = OSSL_PARAM_BLD_new()) == NULL) {
r = SSH_ERR_ALLOC_FAIL;
goto out;
}
- if ((r = sshbuf_get_ec(buf, dh_pub, group)) != 0) {
+ if ((group_name = OSSL_EC_curve_nid2name(kex->ec_nid)) == NULL) {
+ r = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+ if (OSSL_PARAM_BLD_push_octet_string(param_bld,
+ OSSL_PKEY_PARAM_PUB_KEY, pub, publen) != 1 ||
+ OSSL_PARAM_BLD_push_utf8_string(param_bld,
+ OSSL_PKEY_PARAM_GROUP_NAME, group_name, 0) != 1 ||
+ (params = OSSL_PARAM_BLD_to_param(param_bld)) == NULL) {
+ error_f("Failed to set params for dh_pkey");
+ r = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+ if (EVP_PKEY_fromdata_init(ctx) != 1 ||
+ EVP_PKEY_fromdata(ctx, &dh_pkey,
+ EVP_PKEY_PUBLIC_KEY, params) != 1 ||
+ EVP_PKEY_public_check(ctx) != 1) {
+ error_f("Peer public key import failed");
+ r = SSH_ERR_LIBCRYPTO_ERROR;
goto out;
}
- sshbuf_reset(buf);
#ifdef DEBUG_KEXECDH
fputs("public key:\n", stderr);
- sshkey_dump_ec_point(group, dh_pub);
+ EVP_PKEY_print_public_fp(stderr, dh_pkey, 0, NULL);
#endif
- if (sshkey_ec_validate_public(group, dh_pub) != 0) {
- r = SSH_ERR_MESSAGE_INCOMPLETE;
+ EVP_PKEY_CTX_free(ctx);
+ ctx = NULL;
+ if ((ctx = EVP_PKEY_CTX_new_from_pkey(NULL, pkey, NULL)) == NULL ||
+ EVP_PKEY_derive_init(ctx) != 1 ||
+ EVP_PKEY_derive_set_peer(ctx, dh_pkey) != 1 ||
+ EVP_PKEY_derive(ctx, NULL, &klen) != 1) {
+ error_f("Failed to get derive information");
+ r = SSH_ERR_LIBCRYPTO_ERROR;
goto out;
}
- klen = (EC_GROUP_get_degree(group) + 7) / 8;
- if ((kbuf = malloc(klen)) == NULL ||
- (shared_secret = BN_new()) == NULL) {
+ if ((kbuf = malloc(klen)) == NULL) {
r = SSH_ERR_ALLOC_FAIL;
goto out;
}
- if (ECDH_compute_key(kbuf, klen, dh_pub, key, NULL) != (int)klen ||
- BN_bin2bn(kbuf, klen, shared_secret) == NULL) {
+ if (EVP_PKEY_derive(ctx, kbuf, &klen) != 1) {
r = SSH_ERR_LIBCRYPTO_ERROR;
goto out;
}
#ifdef DEBUG_KEXECDH
dump_digest("shared secret", kbuf, klen);
#endif
+ if ((shared_secret = BN_new()) == NULL ||
+ (BN_bin2bn(kbuf, klen, shared_secret) == NULL)) {
+ r = SSH_ERR_ALLOC_FAIL;
+ goto out;
+ }
if ((r = sshbuf_put_bignum2(buf, shared_secret)) != 0)
goto out;
*shared_secretp = buf;
buf = NULL;
out:
- EC_POINT_clear_free(dh_pub);
+ EVP_PKEY_CTX_free(ctx);
+ EVP_PKEY_free(pkey);
+ EVP_PKEY_free(dh_pkey);
+ OSSL_PARAM_BLD_free(param_bld);
+ OSSL_PARAM_free(params);
BN_clear_free(shared_secret);
freezero(kbuf, klen);
+ freezero(pub, publen);
sshbuf_free(buf);
return r;
}

468
openssh-9.0p1-evp-fips-sign.patch Normal file
View File

@ -0,0 +1,468 @@
diff --color -ru -x regress -x autom4te.cache -x '*.o' -x '*.lo' -x Makefile -x config.status -x configure~ -x configure.ac ../../openssh-8.7p1/ssh-dss.c ./ssh-dss.c
--- ../../openssh-8.7p1/ssh-dss.c 2023-03-08 15:35:14.669943335 +0100
+++ ./ssh-dss.c 2023-03-08 15:34:33.508578129 +0100
@@ -32,6 +32,8 @@
#include <openssl/bn.h>
#include <openssl/dsa.h>
#include <openssl/evp.h>
+#include <openssl/core_names.h>
+#include <openssl/param_build.h>
#include <stdarg.h>
#include <string.h>
@@ -72,9 +74,8 @@
sshkey_type_plain(key->type) != KEY_DSA)
return SSH_ERR_INVALID_ARGUMENT;
- if ((pkey = EVP_PKEY_new()) == NULL ||
- EVP_PKEY_set1_DSA(pkey, key->dsa) != 1)
- return SSH_ERR_ALLOC_FAIL;
+ if ((ret = ssh_create_evp_dss(key, &pkey)) != 0)
+ return ret;
ret = sshkey_calculate_signature(pkey, SSH_DIGEST_SHA1, &sigb, &len,
data, datalen);
EVP_PKEY_free(pkey);
@@ -201,11 +202,8 @@
goto out;
}
- if ((pkey = EVP_PKEY_new()) == NULL ||
- EVP_PKEY_set1_DSA(pkey, key->dsa) != 1) {
- ret = SSH_ERR_ALLOC_FAIL;
+ if ((ret = ssh_create_evp_dss(key, &pkey)) != 0)
goto out;
- }
ret = sshkey_verify_signature(pkey, SSH_DIGEST_SHA1, data, datalen,
sigb, slen);
EVP_PKEY_free(pkey);
@@ -221,4 +219,63 @@
freezero(sigblob, len);
return ret;
}
+
+int
+ssh_create_evp_dss(const struct sshkey *k, EVP_PKEY **pkey)
+{
+ OSSL_PARAM_BLD *param_bld = NULL;
+ EVP_PKEY_CTX *ctx = NULL;
+ const BIGNUM *p = NULL, *q = NULL, *g = NULL, *pub = NULL, *priv = NULL;
+ int ret = 0;
+
+ if (k == NULL)
+ return SSH_ERR_INVALID_ARGUMENT;
+ if ((ctx = EVP_PKEY_CTX_new_from_name(NULL, "DSA", NULL)) == NULL ||
+ (param_bld = OSSL_PARAM_BLD_new()) == NULL) {
+ ret = SSH_ERR_ALLOC_FAIL;
+ goto out;
+ }
+
+ DSA_get0_pqg(k->dsa, &p, &q, &g);
+ DSA_get0_key(k->dsa, &pub, &priv);
+
+ if (p != NULL &&
+ OSSL_PARAM_BLD_push_BN(param_bld, OSSL_PKEY_PARAM_FFC_P, p) != 1) {
+ ret = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+ if (q != NULL &&
+ OSSL_PARAM_BLD_push_BN(param_bld, OSSL_PKEY_PARAM_FFC_Q, q) != 1) {
+ ret = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+ if (g != NULL &&
+ OSSL_PARAM_BLD_push_BN(param_bld, OSSL_PKEY_PARAM_FFC_G, g) != 1) {
+ ret = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+ if (pub != NULL &&
+ OSSL_PARAM_BLD_push_BN(param_bld,
+ OSSL_PKEY_PARAM_PUB_KEY,
+ pub) != 1) {
+ ret = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+ if (priv != NULL &&
+ OSSL_PARAM_BLD_push_BN(param_bld,
+ OSSL_PKEY_PARAM_PRIV_KEY,
+ priv) != 1) {
+ ret = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+ if ((*pkey = sshkey_create_evp(param_bld, ctx)) == NULL) {
+ ret = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+
+out:
+ OSSL_PARAM_BLD_free(param_bld);
+ EVP_PKEY_CTX_free(ctx);
+ return ret;
+}
#endif /* WITH_OPENSSL */
diff --color -ru -x regress -x autom4te.cache -x '*.o' -x '*.lo' -x Makefile -x config.status -x configure~ -x configure.ac ../../openssh-8.7p1/ssh-ecdsa.c ./ssh-ecdsa.c
--- ../../openssh-8.7p1/ssh-ecdsa.c 2023-03-08 15:35:14.669943335 +0100
+++ ./ssh-ecdsa.c 2023-03-08 15:40:52.628201267 +0100
@@ -34,6 +34,8 @@
#include <openssl/ec.h>
#include <openssl/ecdsa.h>
#include <openssl/evp.h>
+#include <openssl/core_names.h>
+#include <openssl/param_build.h>
#include <string.h>
@@ -72,9 +74,8 @@
if ((hash_alg = sshkey_ec_nid_to_hash_alg(key->ecdsa_nid)) == -1)
return SSH_ERR_INTERNAL_ERROR;
- if ((pkey = EVP_PKEY_new()) == NULL ||
- EVP_PKEY_set1_EC_KEY(pkey, key->ecdsa) != 1)
- return SSH_ERR_ALLOC_FAIL;
+ if ((ret = ssh_create_evp_ec(key->ecdsa, key->ecdsa_nid, &pkey)) != 0)
+ return ret;
ret = sshkey_calculate_signature(pkey, hash_alg, &sigb, &len, data,
datalen);
EVP_PKEY_free(pkey);
@@ -193,11 +194,8 @@
goto out;
}
- if ((pkey = EVP_PKEY_new()) == NULL ||
- EVP_PKEY_set1_EC_KEY(pkey, key->ecdsa) != 1) {
- ret = SSH_ERR_ALLOC_FAIL;
+ if (ssh_create_evp_ec(key->ecdsa, key->ecdsa_nid, &pkey) != 0)
goto out;
- }
ret = sshkey_verify_signature(pkey, hash_alg, data, datalen, sigb, len);
EVP_PKEY_free(pkey);
@@ -212,4 +210,76 @@
return ret;
}
+int
+ssh_create_evp_ec(EC_KEY *k, int ecdsa_nid, EVP_PKEY **pkey)
+{
+ OSSL_PARAM_BLD *param_bld = NULL;
+ EVP_PKEY_CTX *ctx = NULL;
+ BN_CTX *bn_ctx = NULL;
+ uint8_t *pub_ser = NULL;
+ const char *group_name;
+ const EC_POINT *pub = NULL;
+ const BIGNUM *priv = NULL;
+ int ret = 0;
+
+ if (k == NULL)
+ return SSH_ERR_INVALID_ARGUMENT;
+ if ((ctx = EVP_PKEY_CTX_new_from_name(NULL, "EC", NULL)) == NULL ||
+ (param_bld = OSSL_PARAM_BLD_new()) == NULL ||
+ (bn_ctx = BN_CTX_new()) == NULL) {
+ ret = SSH_ERR_ALLOC_FAIL;
+ goto out;
+ }
+
+ if ((group_name = OSSL_EC_curve_nid2name(ecdsa_nid)) == NULL ||
+ OSSL_PARAM_BLD_push_utf8_string(param_bld,
+ OSSL_PKEY_PARAM_GROUP_NAME,
+ group_name,
+ strlen(group_name)) != 1) {
+ ret = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+ if ((pub = EC_KEY_get0_public_key(k)) != NULL) {
+ const EC_GROUP *group;
+ size_t len;
+
+ group = EC_KEY_get0_group(k);
+ len = EC_POINT_point2oct(group, pub,
+ POINT_CONVERSION_UNCOMPRESSED, NULL, 0, NULL);
+ if ((pub_ser = malloc(len)) == NULL) {
+ ret = SSH_ERR_ALLOC_FAIL;
+ goto out;
+ }
+ EC_POINT_point2oct(group,
+ pub,
+ POINT_CONVERSION_UNCOMPRESSED,
+ pub_ser,
+ len,
+ bn_ctx);
+ if (OSSL_PARAM_BLD_push_octet_string(param_bld,
+ OSSL_PKEY_PARAM_PUB_KEY,
+ pub_ser,
+ len) != 1) {
+ ret = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+ }
+ if ((priv = EC_KEY_get0_private_key(k)) != NULL &&
+ OSSL_PARAM_BLD_push_BN(param_bld,
+ OSSL_PKEY_PARAM_PRIV_KEY, priv) != 1) {
+ ret = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+ if ((*pkey = sshkey_create_evp(param_bld, ctx)) == NULL) {
+ ret = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+
+out:
+ OSSL_PARAM_BLD_free(param_bld);
+ EVP_PKEY_CTX_free(ctx);
+ BN_CTX_free(bn_ctx);
+ free(pub_ser);
+ return ret;
+}
#endif /* WITH_OPENSSL && OPENSSL_HAS_ECC */
diff --color -ru -x regress -x autom4te.cache -x '*.o' -x '*.lo' -x Makefile -x config.status -x configure~ -x configure.ac ../../openssh-8.7p1/sshkey.c ./sshkey.c
--- ../../openssh-8.7p1/sshkey.c 2023-03-08 15:35:14.702943628 +0100
+++ ./sshkey.c 2023-03-08 15:39:03.354082015 +0100
@@ -35,6 +35,8 @@
#include <openssl/err.h>
#include <openssl/pem.h>
#include <openssl/fips.h>
+#include <openssl/core_names.h>
+#include <openssl/param_build.h>
#endif
#include "crypto_api.h"
@@ -492,13 +494,14 @@
{
EVP_MD_CTX *ctx = NULL;
u_char *sig = NULL;
- int ret, slen, len;
+ int ret, slen;
+ size_t len;
if (sigp == NULL || lenp == NULL) {
return SSH_ERR_INVALID_ARGUMENT;
}
- slen = EVP_PKEY_size(pkey);
+ slen = EVP_PKEY_get_size(pkey);
if (slen <= 0 || slen > SSHBUF_MAX_BIGNUM)
return SSH_ERR_INVALID_ARGUMENT;
@@ -511,9 +514,10 @@
ret = SSH_ERR_ALLOC_FAIL;
goto error;
}
- if (EVP_SignInit_ex(ctx, ssh_digest_to_md(hash_alg), NULL) <= 0 ||
- EVP_SignUpdate(ctx, data, datalen) <= 0 ||
- EVP_SignFinal(ctx, sig, &len, pkey) <= 0) {
+ if (EVP_DigestSignInit(ctx, NULL, ssh_digest_to_md(hash_alg),
+ NULL, pkey) != 1 ||
+ EVP_DigestSignUpdate(ctx, data, datalen) != 1 ||
+ EVP_DigestSignFinal(ctx, sig, &len) != 1) {
ret = SSH_ERR_LIBCRYPTO_ERROR;
goto error;
}
@@ -540,12 +544,13 @@
if ((ctx = EVP_MD_CTX_new()) == NULL) {
return SSH_ERR_ALLOC_FAIL;
}
- if (EVP_VerifyInit_ex(ctx, ssh_digest_to_md(hash_alg), NULL) <= 0 ||
- EVP_VerifyUpdate(ctx, data, datalen) <= 0) {
+ if (EVP_DigestVerifyInit(ctx, NULL, ssh_digest_to_md(hash_alg),
+ NULL, pkey) != 1 ||
+ EVP_DigestVerifyUpdate(ctx, data, datalen) != 1) {
ret = SSH_ERR_LIBCRYPTO_ERROR;
goto done;
}
- ret = EVP_VerifyFinal(ctx, sigbuf, siglen, pkey);
+ ret = EVP_DigestVerifyFinal(ctx, sigbuf, siglen);
switch (ret) {
case 1:
ret = 0;
@@ -5038,3 +5043,27 @@
return 0;
}
#endif /* WITH_XMSS */
+
+#ifdef WITH_OPENSSL
+EVP_PKEY *
+sshkey_create_evp(OSSL_PARAM_BLD *param_bld, EVP_PKEY_CTX *ctx)
+{
+ EVP_PKEY *ret = NULL;
+ OSSL_PARAM *params = NULL;
+ if (param_bld == NULL || ctx == NULL) {
+ debug2_f("param_bld or ctx is NULL");
+ return NULL;
+ }
+ if ((params = OSSL_PARAM_BLD_to_param(param_bld)) == NULL) {
+ debug2_f("Could not build param list");
+ return NULL;
+ }
+ if (EVP_PKEY_fromdata_init(ctx) != 1 ||
+ EVP_PKEY_fromdata(ctx, &ret, EVP_PKEY_KEYPAIR, params) != 1) {
+ debug2_f("EVP_PKEY_fromdata failed");
+ OSSL_PARAM_free(params);
+ return NULL;
+ }
+ return ret;
+}
+#endif /* WITH_OPENSSL */
diff --color -ru -x regress -x autom4te.cache -x '*.o' -x '*.lo' -x Makefile -x config.status -x configure~ -x configure.ac ../../openssh-8.7p1/sshkey.h ./sshkey.h
--- ../../openssh-8.7p1/sshkey.h 2023-03-08 15:35:14.702943628 +0100
+++ ./sshkey.h 2023-03-08 15:34:33.509578138 +0100
@@ -31,6 +31,9 @@
#ifdef WITH_OPENSSL
#include <openssl/rsa.h>
#include <openssl/dsa.h>
+#include <openssl/evp.h>
+#include <openssl/param_build.h>
+#include <openssl/core_names.h>
# ifdef OPENSSL_HAS_ECC
# include <openssl/ec.h>
# include <openssl/ecdsa.h>
@@ -293,6 +295,13 @@
void sshkey_sig_details_free(struct sshkey_sig_details *);
+#ifdef WITH_OPENSSL
+EVP_PKEY *sshkey_create_evp(OSSL_PARAM_BLD *, EVP_PKEY_CTX *);
+int ssh_create_evp_dss(const struct sshkey *, EVP_PKEY **);
+int ssh_create_evp_rsa(const struct sshkey *, EVP_PKEY **);
+int ssh_create_evp_ec(EC_KEY *, int, EVP_PKEY **);
+#endif /* WITH_OPENSSL */
+
#ifdef SSHKEY_INTERNAL
int ssh_rsa_sign(const struct sshkey *key,
u_char **sigp, size_t *lenp, const u_char *data, size_t datalen,
diff --color -ru -x regress -x autom4te.cache -x '*.o' -x '*.lo' -x Makefile -x config.status -x configure~ -x configure.ac ../../openssh-8.7p1/ssh-rsa.c ./ssh-rsa.c
--- ../../openssh-8.7p1/ssh-rsa.c 2023-03-08 15:35:14.669943335 +0100
+++ ./ssh-rsa.c 2023-03-08 15:34:33.509578138 +0100
@@ -23,6 +23,8 @@
#include <openssl/evp.h>
#include <openssl/err.h>
+#include <openssl/core_names.h>
+#include <openssl/param_build.h>
#include <stdarg.h>
#include <string.h>
@@ -172,9 +174,8 @@
if (RSA_bits(key->rsa) < SSH_RSA_MINIMUM_MODULUS_SIZE)
return SSH_ERR_KEY_LENGTH;
- if ((pkey = EVP_PKEY_new()) == NULL ||
- EVP_PKEY_set1_RSA(pkey, key->rsa) != 1)
- return SSH_ERR_ALLOC_FAIL;
+ if ((ret = ssh_create_evp_rsa(key, &pkey)) != 0)
+ return ret;
ret = sshkey_calculate_signature(pkey, hash_alg, &sig, &len, data,
datalen);
EVP_PKEY_free(pkey);
@@ -285,11 +286,8 @@
len = modlen;
}
- if ((pkey = EVP_PKEY_new()) == NULL ||
- EVP_PKEY_set1_RSA(pkey, key->rsa) != 1) {
- ret = SSH_ERR_ALLOC_FAIL;
+ if ((ret = ssh_create_evp_rsa(key, &pkey)) != 0)
goto out;
- }
ret = openssh_RSA_verify(hash_alg, data, datalen, sigblob, len, pkey);
EVP_PKEY_free(pkey);
@@ -306,11 +304,9 @@
u_char *sigbuf, size_t siglen, EVP_PKEY *pkey)
{
size_t rsasize = 0;
- const RSA *rsa;
int ret;
- rsa = EVP_PKEY_get0_RSA(pkey);
- rsasize = RSA_size(rsa);
+ rsasize = EVP_PKEY_get_size(pkey);
if (rsasize <= 0 || rsasize > SSHBUF_MAX_BIGNUM ||
siglen == 0 || siglen > rsasize) {
ret = SSH_ERR_INVALID_ARGUMENT;
@@ -323,4 +319,87 @@
done:
return ret;
}
+
+int
+ssh_create_evp_rsa(const struct sshkey *k, EVP_PKEY **pkey)
+{
+ OSSL_PARAM_BLD *param_bld = NULL;
+ EVP_PKEY_CTX *ctx = NULL;
+ int ret = 0;
+ const BIGNUM *n = NULL, *e = NULL, *d = NULL, *p = NULL, *q = NULL;
+ const BIGNUM *dmp1 = NULL, *dmq1 = NULL, *iqmp = NULL;
+
+ if (k == NULL)
+ return SSH_ERR_INVALID_ARGUMENT;
+ if ((ctx = EVP_PKEY_CTX_new_from_name(NULL, "RSA", NULL)) == NULL ||
+ (param_bld = OSSL_PARAM_BLD_new()) == NULL) {
+ ret = SSH_ERR_ALLOC_FAIL;
+ goto out;
+ }
+
+ RSA_get0_key(k->rsa, &n, &e, &d);
+ RSA_get0_factors(k->rsa, &p, &q);
+ RSA_get0_crt_params(k->rsa, &dmp1, &dmq1, &iqmp);
+
+ if (n != NULL &&
+ OSSL_PARAM_BLD_push_BN(param_bld, OSSL_PKEY_PARAM_RSA_N, n) != 1) {
+ ret = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+ if (e != NULL &&
+ OSSL_PARAM_BLD_push_BN(param_bld, OSSL_PKEY_PARAM_RSA_E, e) != 1) {
+ ret = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+ if (d != NULL &&
+ OSSL_PARAM_BLD_push_BN(param_bld, OSSL_PKEY_PARAM_RSA_D, d) != 1) {
+ ret = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+
+ if ((*pkey = sshkey_create_evp(param_bld, ctx)) == NULL) {
+ ret = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+
+ /* setting this to param_build makes the creation process fail */
+ if (p != NULL &&
+ EVP_PKEY_set_bn_param(*pkey, OSSL_PKEY_PARAM_RSA_FACTOR1, p) != 1) {
+ debug2_f("failed to add 'p' param");
+ ret = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+ if (q != NULL &&
+ EVP_PKEY_set_bn_param(*pkey, OSSL_PKEY_PARAM_RSA_FACTOR2, q) != 1) {
+ debug2_f("failed to add 'q' param");
+ ret = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+ if (dmp1 != NULL &&
+ EVP_PKEY_set_bn_param(*pkey,
+ OSSL_PKEY_PARAM_RSA_EXPONENT1, dmp1) != 1) {
+ debug2_f("failed to add 'dmp1' param");
+ ret = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+ if (dmq1 != NULL &&
+ EVP_PKEY_set_bn_param(*pkey,
+ OSSL_PKEY_PARAM_RSA_EXPONENT2, dmq1) != 1) {
+ debug2_f("failed to add 'dmq1' param");
+ ret = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+ if (iqmp != NULL &&
+ EVP_PKEY_set_bn_param(*pkey,
+ OSSL_PKEY_PARAM_RSA_COEFFICIENT1, iqmp) != 1) {
+ debug2_f("failed to add 'iqmp' param");
+ ret = SSH_ERR_LIBCRYPTO_ERROR;
+ goto out;
+ }
+
+out:
+ OSSL_PARAM_BLD_free(param_bld);
+ EVP_PKEY_CTX_free(ctx);
+ return ret;
+}
#endif /* WITH_OPENSSL */

14
openssh.spec
View File

@ -47,7 +47,7 @@
# Do not forget to bump pam_ssh_agent_auth release if you rewind the main package release to 1
%global openssh_ver 9.0p1
%global openssh_rel 15
%global openssh_rel 16
%global pam_ssh_agent_ver 0.10.4
%global pam_ssh_agent_rel 8
@ -243,6 +243,10 @@ Patch1009: openssh-configure-c99-3.patch
Patch1010: openssh-8.7p1-CVE-2023-25136.patch
Patch1011: openssh-9.0p1-evp-fips-sign.patch
Patch1012: openssh-9.0p1-evp-fips-dh.patch
Patch1013: openssh-9.0p1-evp-fips-ecdh.patch
# downstream only
# we skip some ssh-rsa/ssh-dss tests to make native test suite pass
#Patch1100: openssh-8.8p1-skip-some-tests.patch
@ -454,6 +458,10 @@ popd
%patch1009 -p1 -b .configure-c99-3
%patch1010 -p1 -b .cve-2023-25136
%patch1011 -p1 -b .evp-fips-sign
%patch1012 -p1 -b .evp-fips-dh
%patch1013 -p1 -b .evp-fips-ecdh
#%patch1100 -p1 -b .skipsshrsadsstests
%patch100 -p1 -b .coverity
@ -762,6 +770,10 @@ test -f %{sysconfig_anaconda} && \
%endif
%changelog
* Thu Apr 13 2023 Norbert Pocs <npocs@redhat.com> - 9.0p1-16
- Make the sign, dh, ecdh processes FIPS compliant by adopting to
openssl 3.0
* Thu Apr 13 2023 Dmitry Belyavskiy <dbelyavs@redhat.com> - 9.0p1-15
- Fix self-DoS
Resolves: CVE-2023-25136