Fix minor issues with openssh-8.7p1-evp-fips-compl-dh.patch
- Check return values - Use EVP API to get the size of DH Related: rhbz#2091694 Signed-off-by: Norbert Pocs <npocs@redhat.com>
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Norbert Pocs
parent
587d7b215f
commit
1490ffd3e0
@ -1,6 +1,6 @@
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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
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--- ../../openssh-8.7p1/dh.c 2023-03-01 14:26:52.504445780 +0100
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+++ ./dh.c 2023-03-01 14:20:09.823193384 +0100
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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 openssh-8.7p1-patched/dh.c
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--- openssh-8.7p1/dh.c 2023-05-16 15:38:53.461326047 +0200
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+++ openssh-8.7p1-patched/dh.c 2023-05-16 15:37:14.785260359 +0200
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@@ -37,6 +37,9 @@
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#include <openssl/bn.h>
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#include <openssl/dh.h>
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@ -11,7 +11,7 @@ diff --color -ru -x regress -x autom4te.cache -x '*.o' -x '*.lo' -x Makefile -x
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#include "dh.h"
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#include "pathnames.h"
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@@ -289,10 +292,15 @@
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@@ -290,10 +293,15 @@
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int
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dh_gen_key(DH *dh, int need)
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{
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@ -30,7 +30,7 @@ diff --color -ru -x regress -x autom4te.cache -x '*.o' -x '*.lo' -x Makefile -x
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if (need < 0 || dh_p == NULL ||
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(pbits = BN_num_bits(dh_p)) <= 0 ||
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@@ -300,19 +308,85 @@
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@@ -301,19 +309,85 @@
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return SSH_ERR_INVALID_ARGUMENT;
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if (need < 256)
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need = 256;
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@ -125,10 +125,10 @@ diff --color -ru -x regress -x autom4te.cache -x '*.o' -x '*.lo' -x Makefile -x
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}
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DH *
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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
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--- ../../openssh-8.7p1/kex.c 2023-03-01 14:26:52.508445832 +0100
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+++ ./kex.c 2023-02-28 14:09:27.164743771 +0100
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@@ -1602,3 +1602,47 @@
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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 openssh-8.7p1-patched/kex.c
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--- openssh-8.7p1/kex.c 2023-05-16 15:38:53.465326090 +0200
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+++ openssh-8.7p1-patched/kex.c 2023-05-16 15:37:14.785260359 +0200
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@@ -1603,3 +1603,47 @@
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return r;
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}
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@ -176,20 +176,21 @@ diff --color -ru -x regress -x autom4te.cache -x '*.o' -x '*.lo' -x Makefile -x
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+ return r;
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+}
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+#endif /* WITH_OPENSSL */
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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
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--- ../../openssh-8.7p1/kexdh.c 2023-03-01 14:26:52.448445050 +0100
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+++ ./kexdh.c 2023-02-28 14:05:00.700902124 +0100
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@@ -35,6 +35,9 @@
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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 openssh-8.7p1-patched/kexdh.c
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--- openssh-8.7p1/kexdh.c 2023-05-16 15:38:53.403325420 +0200
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+++ openssh-8.7p1-patched/kexdh.c 2023-05-16 15:37:34.097468928 +0200
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@@ -35,6 +35,10 @@
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#include "openbsd-compat/openssl-compat.h"
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#include <openssl/dh.h>
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+#include <openssl/err.h>
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+#include <openssl/evp.h>
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+#include <openssl/core_names.h>
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+#include <openssl/param_build.h>
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#include "sshkey.h"
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#include "kex.h"
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@@ -83,6 +86,9 @@
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@@ -83,9 +87,12 @@
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kex_dh_compute_key(struct kex *kex, BIGNUM *dh_pub, struct sshbuf *out)
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{
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BIGNUM *shared_secret = NULL;
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@ -198,31 +199,61 @@ diff --color -ru -x regress -x autom4te.cache -x '*.o' -x '*.lo' -x Makefile -x
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+ EVP_PKEY_CTX *ctx = NULL;
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u_char *kbuf = NULL;
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size_t klen = 0;
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int kout, r;
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@@ -106,18 +112,39 @@
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r = SSH_ERR_ALLOC_FAIL;
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- int kout, r;
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+ int kout, r = 0;
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#ifdef DEBUG_KEXDH
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fprintf(stderr, "dh_pub= ");
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@@ -100,24 +107,64 @@
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r = SSH_ERR_MESSAGE_INCOMPLETE;
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goto out;
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}
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- if ((kout = DH_compute_key(kbuf, dh_pub, kex->dh)) < 0 ||
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- BN_bin2bn(kbuf, kout, shared_secret) == NULL) {
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- klen = DH_size(kex->dh);
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+
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+ DH_get0_key(kex->dh, &pub, &priv);
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+ DH_get0_pqg(kex->dh, &p, &q, &g);
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+ /* import key */
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+ kex_create_evp_dh(&pkey, p, q, g, pub, priv);
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+ r = kex_create_evp_dh(&pkey, p, q, g, pub, priv);
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+ if (r != 0) {
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+ error_f("Could not create EVP_PKEY for dh");
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+ ERR_print_errors_fp(stderr);
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+ goto out;
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+ }
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+ /* import peer key
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+ * the parameters should be the same as with pkey
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+ */
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+ kex_create_evp_dh(&dh_pkey, p, q, g, dh_pub, NULL);
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+ debug_f("import peer key to evp");
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+ r = kex_create_evp_dh(&dh_pkey, p, q, g, dh_pub, NULL);
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+ if (r != 0) {
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+ error_f("Could not import peer key for dh");
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+ ERR_print_errors_fp(stderr);
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+ goto out;
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+ }
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+
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+ debug_f("creating EVP_PKEY_CTX");
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+ if ((ctx = EVP_PKEY_CTX_new_from_pkey(NULL, pkey, NULL)) == NULL) {
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+ error_f("Could not init EVP_PKEY_CTX for dh");
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+ r = SSH_ERR_ALLOC_FAIL;
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+ goto out;
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+ }
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+ debug_f("Deriving - init context");
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+ if (EVP_PKEY_derive_init(ctx) != 1 ||
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+ EVP_PKEY_derive_set_peer(ctx, dh_pkey) != 1 ||
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+ EVP_PKEY_derive(ctx, kbuf, &klen) != 1 ||
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+ EVP_PKEY_derive(ctx, NULL, &klen) != 1) {
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+ error_f("Could not get key size");
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+ r = SSH_ERR_LIBCRYPTO_ERROR;
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+ goto out;
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+ }
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+ debug_f("Deriving - buffer size is %d", (int)klen);
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if ((kbuf = malloc(klen)) == NULL ||
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(shared_secret = BN_new()) == NULL) {
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r = SSH_ERR_ALLOC_FAIL;
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goto out;
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}
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- if ((kout = DH_compute_key(kbuf, dh_pub, kex->dh)) < 0 ||
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- BN_bin2bn(kbuf, kout, shared_secret) == NULL) {
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+ debug_f("Deriving - using real buffer");
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+ if (EVP_PKEY_derive(ctx, kbuf, &klen) != 1 ||
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+ BN_bin2bn(kbuf, klen, shared_secret) == NULL) {
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+ error_f("Could not derive key");
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r = SSH_ERR_LIBCRYPTO_ERROR;
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@ -242,9 +273,9 @@ diff --color -ru -x regress -x autom4te.cache -x '*.o' -x '*.lo' -x Makefile -x
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return r;
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}
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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
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--- ../../openssh-8.7p1/kex.h 2023-03-01 14:26:52.508445832 +0100
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+++ ./kex.h 2023-02-28 13:16:49.811047554 +0100
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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 openssh-8.7p1-patched/kex.h
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--- openssh-8.7p1/kex.h 2023-05-16 15:38:53.465326090 +0200
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+++ openssh-8.7p1-patched/kex.h 2023-05-16 15:37:14.786260370 +0200
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@@ -33,6 +33,9 @@
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# include <openssl/bn.h>
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# include <openssl/dh.h>
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@ -51,7 +51,7 @@
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# Do not forget to bump pam_ssh_agent_auth release if you rewind the main package release to 1
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%global openssh_ver 8.7p1
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%global openssh_rel 30
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%global openssh_rel 31
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%global pam_ssh_agent_ver 0.10.4
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%global pam_ssh_agent_rel 5
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@ -770,6 +770,13 @@ test -f %{sysconfig_anaconda} && \
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%endif
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%changelog
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* Tue May 16 2023 Norbert Pocs <npocs@redhat.com> - 8.7p1-31
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- Fix minor issues with openssh-8.7p1-evp-fips-compl-dh.patch:
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- Check return values
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- Use EVP API to get the size of DH
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- Add some log debug lines
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- Related: rhbz#2091694
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* Thu Apr 20 2023 Dmitry Belyavskiy <dbelyavs@redhat.com> - 8.7p1-30
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- Some non-terminating processes were listening on ports.
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Resolves: rhbz#2177768
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