Use EVP functions for RSA and EC key generation
Related: rhbz#2087121
This commit is contained in:
Dmitry Belyavskiy
parent
4b21ae5fcb
commit
d0bf0e31d9
@ -409,9 +409,9 @@ diff -up openssh-8.6p1/sshkey.c.fips openssh-8.6p1/sshkey.c
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#ifdef WITH_XMSS
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@@ -1705,6 +1707,8 @@ rsa_generate_private_key(u_int bits, RSA
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}
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if (!BN_set_word(f4, RSA_F4) ||
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!RSA_generate_key_ex(private, bits, f4, NULL)) {
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goto out;
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if (EVP_PKEY_keygen(ctx, &res) <= 0) {
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+ if (FIPS_mode())
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+ logit_f("the key length might be unsupported by FIPS mode approved key generation method");
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ret = SSH_ERR_LIBCRYPTO_ERROR;
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110
openssh-8.7p1-evpgenkey.patch
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110
openssh-8.7p1-evpgenkey.patch
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@ -0,0 +1,110 @@
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diff -up openssh-8.7p1/sshkey.c.evpgenrsa openssh-8.7p1/sshkey.c
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--- openssh-8.7p1/sshkey.c.evpgenrsa 2022-06-30 15:14:58.200518353 +0200
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+++ openssh-8.7p1/sshkey.c 2022-06-30 15:24:31.499641196 +0200
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@@ -1657,7 +1657,8 @@ sshkey_cert_type(const struct sshkey *k)
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static int
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rsa_generate_private_key(u_int bits, RSA **rsap)
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{
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- RSA *private = NULL;
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+ EVP_PKEY_CTX *ctx = NULL;
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+ EVP_PKEY *res = NULL;
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BIGNUM *f4 = NULL;
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int ret = SSH_ERR_INTERNAL_ERROR;
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@@ -1667,20 +1668,42 @@ rsa_generate_private_key(u_int bits, RSA
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bits > SSHBUF_MAX_BIGNUM * 8)
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return SSH_ERR_KEY_LENGTH;
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*rsap = NULL;
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- if ((private = RSA_new()) == NULL || (f4 = BN_new()) == NULL) {
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+
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+ if ((ctx = EVP_PKEY_CTX_new_from_name(NULL, "RSA", NULL)) == NULL
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+ || (f4 = BN_new()) == NULL || !BN_set_word(f4, RSA_F4)) {
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ret = SSH_ERR_ALLOC_FAIL;
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goto out;
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}
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- if (!BN_set_word(f4, RSA_F4) ||
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- !RSA_generate_key_ex(private, bits, f4, NULL)) {
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+
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+ if (EVP_PKEY_keygen_init(ctx) <= 0) {
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+ ret = SSH_ERR_LIBCRYPTO_ERROR;
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+ goto out;
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+ }
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+
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+ if (EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, bits) <= 0) {
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+ ret = SSH_ERR_KEY_LENGTH;
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+ goto out;
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+ }
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+
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+ if (EVP_PKEY_CTX_set1_rsa_keygen_pubexp(ctx, f4) <= 0)
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+ goto out;
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+
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+ if (EVP_PKEY_keygen(ctx, &res) <= 0) {
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+ ret = SSH_ERR_LIBCRYPTO_ERROR;
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+ goto out;
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+ }
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+
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+ /* This function is deprecated in OpenSSL 3.0 but OpenSSH doesn't worry about it*/
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+ *rsap = EVP_PKEY_get1_RSA(res);
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+ if (*rsap) {
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+ ret = 0;
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+ } else {
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ret = SSH_ERR_LIBCRYPTO_ERROR;
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goto out;
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}
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- *rsap = private;
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- private = NULL;
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- ret = 0;
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out:
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- RSA_free(private);
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+ EVP_PKEY_CTX_free(ctx);
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+ EVP_PKEY_free(res);
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BN_free(f4);
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return ret;
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}
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@@ -1820,7 +1820,8 @@ sshkey_ecdsa_key_to_nid(EC_KEY *k)
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static int
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ecdsa_generate_private_key(u_int bits, int *nid, EC_KEY **ecdsap)
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{
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- EC_KEY *private;
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+ EVP_PKEY_CTX *ctx = NULL;
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+ EVP_PKEY *res = NULL;
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int ret = SSH_ERR_INTERNAL_ERROR;
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if (nid == NULL || ecdsap == NULL)
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@@ -1828,20 +1829,29 @@ ecdsa_generate_private_key(u_int bits, i
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if ((*nid = sshkey_ecdsa_bits_to_nid(bits)) == -1)
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return SSH_ERR_KEY_LENGTH;
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*ecdsap = NULL;
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- if ((private = EC_KEY_new_by_curve_name(*nid)) == NULL) {
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+
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+ if ((ctx = EVP_PKEY_CTX_new_from_name(NULL, "EC", NULL)) == NULL) {
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ret = SSH_ERR_ALLOC_FAIL;
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goto out;
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}
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- if (EC_KEY_generate_key(private) != 1) {
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+
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+ if (EVP_PKEY_keygen_init(ctx) <= 0 || EVP_PKEY_CTX_set_group_name(ctx, OBJ_nid2sn(*nid)) <= 0
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+ || EVP_PKEY_keygen(ctx, &res) <= 0) {
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+ ret = SSH_ERR_LIBCRYPTO_ERROR;
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+ goto out;
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+ }
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+ /* This function is deprecated in OpenSSL 3.0 but OpenSSH doesn't worry about it*/
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+ *ecdsap = EVP_PKEY_get1_EC_KEY(res);
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+ if (*ecdsap) {
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+ EC_KEY_set_asn1_flag(*ecdsap, OPENSSL_EC_NAMED_CURVE);
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+ ret = 0;
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+ } else {
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ret = SSH_ERR_LIBCRYPTO_ERROR;
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goto out;
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}
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- EC_KEY_set_asn1_flag(private, OPENSSL_EC_NAMED_CURVE);
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- *ecdsap = private;
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- private = NULL;
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- ret = 0;
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out:
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- EC_KEY_free(private);
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+ EVP_PKEY_CTX_free(ctx);
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+ EVP_PKEY_free(res);
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return ret;
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}
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# endif /* OPENSSL_HAS_ECC */
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@ -214,6 +214,8 @@ Patch980: openssh-8.7p1-sftpscp-dir-create.patch
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Patch981: openssh-8.7p1-recursive-scp.patch
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# https://github.com/djmdjm/openssh-wip/pull/13
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Patch982: openssh-8.7p1-minrsabits.patch
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# downstream only
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Patch983: openssh-8.7p1-evpgenkey.patch
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# Minimize the use of SHA1 as a proof of possession for RSA key (#2031868)
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# upstream commits:
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@ -402,6 +404,7 @@ popd
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%patch980 -p1 -b .sftpdirs
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%patch981 -p1 -b .scp-sftpdirs
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%patch982 -p1 -b .minrsabits
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%patch983 -p1 -b .evpgenrsa
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%patch200 -p1 -b .audit
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%patch201 -p1 -b .audit-race
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@ -691,6 +694,8 @@ test -f %{sysconfig_anaconda} && \
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* Wed Jun 29 2022 Dmitry Belyavskiy <dbelyavs@redhat.com> - 8.7p1-10
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- Set minimal value of RSA key length via configuration option
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Related: rhbz#2066882
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- Use EVP functions for RSA key generation
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Related: rhbz#2087121
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* Wed Jun 29 2022 Zoltan Fridrich <zfridric@redhat.com> - 8.7p1-9
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- Update minimize-sha1-use.patch to use upstream code
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