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pki_crypto: Use getters and setters for opaque keys and signatures

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This is for OpenSSL 1.1.0 support.

Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This commit is contained in:
Jakub Jelen
2016-11-02 17:02:58 +01:00
committed by Andreas Schneider
parent 5d2e9ee66e
commit 3341f49a49
1 changed files with 206 additions and 95 deletions
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301
src/pki_crypto.c
View File

@@ -31,6 +31,7 @@
#include <openssl/dsa.h>
#include <openssl/err.h>
#include <openssl/rsa.h>
#include "libcrypto-compat.h"
#ifdef HAVE_OPENSSL_EC_H
#include <openssl/ec.h>
@@ -230,7 +231,10 @@ ssh_key pki_key_dup(const ssh_key key, int demote)
}
switch (key->type) {
case SSH_KEYTYPE_DSS:
case SSH_KEYTYPE_DSS: {
const BIGNUM *p = NULL, *q = NULL, *g = NULL,
*pub_key = NULL, *priv_key = NULL;
BIGNUM *np, *nq, *ng, *npub_key, *npriv_key;
new->dsa = DSA_new();
if (new->dsa == NULL) {
goto fail;
@@ -243,36 +247,54 @@ ssh_key pki_key_dup(const ssh_key key, int demote)
* pub_key = public key y = g^x
* priv_key = private key x
*/
new->dsa->p = BN_dup(key->dsa->p);
if (new->dsa->p == NULL) {
DSA_get0_pqg(key->dsa, &p, &q, &g);
np = BN_dup(p);
nq = BN_dup(q);
ng = BN_dup(g);
if (np == NULL || nq == NULL || ng == NULL) {
BN_free(np);
BN_free(nq);
BN_free(ng);
goto fail;
}
new->dsa->q = BN_dup(key->dsa->q);
if (new->dsa->q == NULL) {
rc = DSA_set0_pqg(new->dsa, np, nq, ng);
if (rc == 0) {
BN_free(np);
BN_free(nq);
BN_free(ng);
goto fail;
}
new->dsa->g = BN_dup(key->dsa->g);
if (new->dsa->g == NULL) {
DSA_get0_key(key->dsa, &pub_key, &priv_key);
npub_key = BN_dup(pub_key);
if (npub_key == NULL) {
goto fail;
}
new->dsa->pub_key = BN_dup(key->dsa->pub_key);
if (new->dsa->pub_key == NULL) {
rc = DSA_set0_key(new->dsa, npub_key, NULL);
if (rc == 0) {
goto fail;
}
if (!demote && (key->flags & SSH_KEY_FLAG_PRIVATE)) {
new->dsa->priv_key = BN_dup(key->dsa->priv_key);
if (new->dsa->priv_key == NULL) {
npriv_key = BN_dup(priv_key);
if (npriv_key == NULL) {
goto fail;
}
rc = DSA_set0_key(new->dsa, NULL, npriv_key);
if (rc == 0) {
goto fail;
}
}
break;
}
case SSH_KEYTYPE_RSA:
case SSH_KEYTYPE_RSA1:
case SSH_KEYTYPE_RSA1: {
const BIGNUM *n = NULL, *e = NULL, *d = NULL;
BIGNUM *nn, *ne, *nd;
new->rsa = RSA_new();
if (new->rsa == NULL) {
goto fail;
@@ -288,62 +310,82 @@ ssh_key pki_key_dup(const ssh_key key, int demote)
* dmq1 = d mod (q-1)
* iqmp = q^-1 mod p
*/
new->rsa->n = BN_dup(key->rsa->n);
if (new->rsa->n == NULL) {
RSA_get0_key(key->rsa, &n, &e, &d);
nn = BN_dup(n);
ne = BN_dup(e);
if (nn == NULL || ne == NULL) {
BN_free(nn);
BN_free(ne);
goto fail;
}
new->rsa->e = BN_dup(key->rsa->e);
if (new->rsa->e == NULL) {
rc = RSA_set0_key(new->rsa, nn, ne, NULL);
if (rc == 0) {
BN_free(nn);
BN_free(ne);
goto fail;
}
if (!demote && (key->flags & SSH_KEY_FLAG_PRIVATE)) {
new->rsa->d = BN_dup(key->rsa->d);
if (new->rsa->d == NULL) {
const BIGNUM *p = NULL, *q = NULL, *dmp1 = NULL,
*dmq1 = NULL, *iqmp = NULL;
BIGNUM *np, *nq, *ndmp1, *ndmq1, *niqmp;
nd = BN_dup(d);
if (nd == NULL) {
goto fail;
}
rc = RSA_set0_key(new->rsa, NULL, NULL, nd);
if (rc == 0) {
goto fail;
}
/* p, q, dmp1, dmq1 and iqmp may be NULL in private keys, but the
* RSA operations are much faster when these values are available.
*/
if (key->rsa->p != NULL) {
new->rsa->p = BN_dup(key->rsa->p);
if (new->rsa->p == NULL) {
RSA_get0_factors(key->rsa, &p, &q);
if (p != NULL && q != NULL) { /* need to set both of them */
np = BN_dup(p);
nq = BN_dup(q);
if (np == NULL || nq == NULL) {
BN_free(np);
BN_free(nq);
goto fail;
}
rc = RSA_set0_factors(new->rsa, np, nq);
if (rc == 0) {
BN_free(np);
BN_free(nq);
goto fail;
}
}
if (key->rsa->q != NULL) {
new->rsa->q = BN_dup(key->rsa->q);
if (new->rsa->q == NULL) {
RSA_get0_crt_params(key->rsa, &dmp1, &dmq1, &iqmp);
if (dmp1 != NULL || dmq1 != NULL || iqmp != NULL) {
ndmp1 = BN_dup(dmp1);
ndmq1 = BN_dup(dmq1);
niqmp = BN_dup(iqmp);
if (ndmp1 == NULL || ndmq1 == NULL || niqmp == NULL) {
BN_free(ndmp1);
BN_free(ndmq1);
BN_free(niqmp);
goto fail;
}
}
if (key->rsa->dmp1 != NULL) {
new->rsa->dmp1 = BN_dup(key->rsa->dmp1);
if (new->rsa->dmp1 == NULL) {
goto fail;
}
}
if (key->rsa->dmq1 != NULL) {
new->rsa->dmq1 = BN_dup(key->rsa->dmq1);
if (new->rsa->dmq1 == NULL) {
goto fail;
}
}
if (key->rsa->iqmp != NULL) {
new->rsa->iqmp = BN_dup(key->rsa->iqmp);
if (new->rsa->iqmp == NULL) {
rc = RSA_set0_crt_params(new->rsa, ndmp1, ndmq1, niqmp);
if (rc == 0) {
BN_free(ndmp1);
BN_free(ndmq1);
BN_free(niqmp);
goto fail;
}
}
}
break;
}
case SSH_KEYTYPE_ECDSA:
#ifdef HAVE_OPENSSL_ECC
new->ecdsa_nid = key->ecdsa_nid;
@@ -466,51 +508,64 @@ int pki_key_compare(const ssh_key k1,
enum ssh_keycmp_e what)
{
switch (k1->type) {
case SSH_KEYTYPE_DSS:
case SSH_KEYTYPE_DSS: {
const BIGNUM *p1, *p2, *q1, *q2, *g1, *g2,
*pub_key1, *pub_key2, *priv_key1, *priv_key2;
if (DSA_size(k1->dsa) != DSA_size(k2->dsa)) {
return 1;
}
if (bignum_cmp(k1->dsa->p, k2->dsa->p) != 0) {
DSA_get0_pqg(k1->dsa, &p1, &q1, &g1);
DSA_get0_pqg(k2->dsa, &p2, &q2, &g2);
if (bignum_cmp(p1, p2) != 0) {
return 1;
}
if (bignum_cmp(k1->dsa->q, k2->dsa->q) != 0) {
if (bignum_cmp(q1, q2) != 0) {
return 1;
}
if (bignum_cmp(k1->dsa->g, k2->dsa->g) != 0) {
if (bignum_cmp(g1, g2) != 0) {
return 1;
}
if (bignum_cmp(k1->dsa->pub_key, k2->dsa->pub_key) != 0) {
DSA_get0_key(k1->dsa, &pub_key1, &priv_key1);
DSA_get0_key(k2->dsa, &pub_key2, &priv_key2);
if (bignum_cmp(pub_key1, pub_key2) != 0) {
return 1;
}
if (what == SSH_KEY_CMP_PRIVATE) {
if (bignum_cmp(k1->dsa->priv_key, k2->dsa->priv_key) != 0) {
if (bignum_cmp(priv_key1, priv_key2) != 0) {
return 1;
}
}
break;
}
case SSH_KEYTYPE_RSA:
case SSH_KEYTYPE_RSA1:
case SSH_KEYTYPE_RSA1: {
const BIGNUM *e1, *e2, *n1, *n2, *p1, *p2, *q1, *q2;
if (RSA_size(k1->rsa) != RSA_size(k2->rsa)) {
return 1;
}
if (bignum_cmp(k1->rsa->e, k2->rsa->e) != 0) {
RSA_get0_key(k1->rsa, &n1, &e1, NULL);
RSA_get0_key(k2->rsa, &n2, &e2, NULL);
if (bignum_cmp(e1, e2) != 0) {
return 1;
}
if (bignum_cmp(k1->rsa->n, k2->rsa->n) != 0) {
if (bignum_cmp(n1, n2) != 0) {
return 1;
}
if (what == SSH_KEY_CMP_PRIVATE) {
if (bignum_cmp(k1->rsa->p, k2->rsa->p) != 0) {
RSA_get0_factors(k1->rsa, &p1, &q1);
RSA_get0_factors(k2->rsa, &p2, &q2);
if (bignum_cmp(p1, p2) != 0) {
return 1;
}
if (bignum_cmp(k1->rsa->q, k2->rsa->q) != 0) {
if (bignum_cmp(q1, q2) != 0) {
return 1;
}
}
break;
}
case SSH_KEYTYPE_ECDSA:
#ifdef HAVE_OPENSSL_ECC
{
@@ -826,43 +881,65 @@ int pki_pubkey_build_dss(ssh_key key,
ssh_string q,
ssh_string g,
ssh_string pubkey) {
int rc;
BIGNUM *bp, *bq, *bg, *bpub_key;
key->dsa = DSA_new();
if (key->dsa == NULL) {
return SSH_ERROR;
}
key->dsa->p = ssh_make_string_bn(p);
key->dsa->q = ssh_make_string_bn(q);
key->dsa->g = ssh_make_string_bn(g);
key->dsa->pub_key = ssh_make_string_bn(pubkey);
if (key->dsa->p == NULL ||
key->dsa->q == NULL ||
key->dsa->g == NULL ||
key->dsa->pub_key == NULL) {
DSA_free(key->dsa);
return SSH_ERROR;
bp = ssh_make_string_bn(p);
bq = ssh_make_string_bn(q);
bg = ssh_make_string_bn(g);
bpub_key = ssh_make_string_bn(pubkey);
if (bp == NULL || bq == NULL ||
bg == NULL || bpub_key == NULL) {
goto fail;
}
rc = DSA_set0_pqg(key->dsa, bp, bq, bg);
if (rc == 0) {
goto fail;
}
rc = DSA_set0_key(key->dsa, bpub_key, NULL);
if (rc == 0) {
goto fail;
}
return SSH_OK;
fail:
DSA_free(key->dsa);
return SSH_ERROR;
}
int pki_pubkey_build_rsa(ssh_key key,
ssh_string e,
ssh_string n) {
int rc;
BIGNUM *be, *bn;
key->rsa = RSA_new();
if (key->rsa == NULL) {
return SSH_ERROR;
}
key->rsa->e = ssh_make_string_bn(e);
key->rsa->n = ssh_make_string_bn(n);
if (key->rsa->e == NULL ||
key->rsa->n == NULL) {
RSA_free(key->rsa);
return SSH_ERROR;
be = ssh_make_string_bn(e);
bn = ssh_make_string_bn(n);
if (be == NULL || bn == NULL) {
goto fail;
}
rc = RSA_set0_key(key->rsa, bn, be, NULL);
if (rc == 0) {
goto fail;
}
return SSH_OK;
fail:
RSA_free(key->rsa);
return SSH_ERROR;
}
ssh_string pki_publickey_to_blob(const ssh_key key)
@@ -905,23 +982,26 @@ ssh_string pki_publickey_to_blob(const ssh_key key)
}
switch (key->type) {
case SSH_KEYTYPE_DSS:
p = ssh_make_bignum_string(key->dsa->p);
case SSH_KEYTYPE_DSS: {
const BIGNUM *bp, *bq, *bg, *bpub_key;
DSA_get0_pqg(key->dsa, &bp, &bq, &bg);
p = ssh_make_bignum_string((BIGNUM *)bp);
if (p == NULL) {
goto fail;
}
q = ssh_make_bignum_string(key->dsa->q);
q = ssh_make_bignum_string((BIGNUM *)bq);
if (q == NULL) {
goto fail;
}
g = ssh_make_bignum_string(key->dsa->g);
g = ssh_make_bignum_string((BIGNUM *)bg);
if (g == NULL) {
goto fail;
}
n = ssh_make_bignum_string(key->dsa->pub_key);
DSA_get0_key(key->dsa, &bpub_key, NULL);
n = ssh_make_bignum_string((BIGNUM *)bpub_key);
if (n == NULL) {
goto fail;
}
@@ -953,14 +1033,17 @@ ssh_string pki_publickey_to_blob(const ssh_key key)
n = NULL;
break;
}
case SSH_KEYTYPE_RSA:
case SSH_KEYTYPE_RSA1:
e = ssh_make_bignum_string(key->rsa->e);
case SSH_KEYTYPE_RSA1: {
const BIGNUM *be, *bn;
RSA_get0_key(key->rsa, &bn, &be, NULL);
e = ssh_make_bignum_string((BIGNUM *)be);
if (e == NULL) {
goto fail;
}
n = ssh_make_bignum_string(key->rsa->n);
n = ssh_make_bignum_string((BIGNUM *)bn);
if (n == NULL) {
goto fail;
}
@@ -980,6 +1063,7 @@ ssh_string pki_publickey_to_blob(const ssh_key key)
n = NULL;
break;
}
case SSH_KEYTYPE_ECDSA:
#ifdef HAVE_OPENSSL_ECC
rc = ssh_buffer_reinit(buffer);
@@ -1082,13 +1166,15 @@ int pki_export_pubkey_rsa1(const ssh_key key,
char *e;
char *n;
int rsa_size = RSA_size(key->rsa);
const BIGNUM *be, *bn;
e = bignum_bn2dec(key->rsa->e);
RSA_get0_key(key->rsa, &bn, &be, NULL);
e = bignum_bn2dec(be);
if (e == NULL) {
return SSH_ERROR;
}
n = bignum_bn2dec(key->rsa->n);
n = bignum_bn2dec(bn);
if (n == NULL) {
OPENSSL_free(e);
return SSH_ERROR;
@@ -1153,6 +1239,7 @@ static ssh_string pki_dsa_signature_to_blob(const ssh_signature sig)
{
char buffer[40] = { 0 };
ssh_string sig_blob = NULL;
const BIGNUM *pr, *ps;
ssh_string r;
int r_len, r_offset_in, r_offset_out;
@@ -1160,12 +1247,13 @@ static ssh_string pki_dsa_signature_to_blob(const ssh_signature sig)
ssh_string s;
int s_len, s_offset_in, s_offset_out;
r = ssh_make_bignum_string(sig->dsa_sig->r);
DSA_SIG_get0(sig->dsa_sig, &pr, &ps);
r = ssh_make_bignum_string((BIGNUM *)pr);
if (r == NULL) {
return NULL;
}
s = ssh_make_bignum_string(sig->dsa_sig->s);
s = ssh_make_bignum_string((BIGNUM *)ps);
if (s == NULL) {
ssh_string_free(r);
return NULL;
@@ -1218,13 +1306,15 @@ ssh_string pki_signature_to_blob(const ssh_signature sig)
ssh_string s;
ssh_buffer b;
int rc;
const BIGNUM *pr, *ps;
b = ssh_buffer_new();
if (b == NULL) {
return NULL;
}
r = ssh_make_bignum_string(sig->ecdsa_sig->r);
ECDSA_SIG_get0(sig->ecdsa_sig, &pr, &ps);
r = ssh_make_bignum_string((BIGNUM *)pr);
if (r == NULL) {
ssh_buffer_free(b);
return NULL;
@@ -1236,7 +1326,7 @@ ssh_string pki_signature_to_blob(const ssh_signature sig)
return NULL;
}
s = ssh_make_bignum_string(sig->ecdsa_sig->s);
s = ssh_make_bignum_string((BIGNUM *)ps);
if (s == NULL) {
ssh_buffer_free(b);
return NULL;
@@ -1345,6 +1435,7 @@ ssh_signature pki_signature_from_blob(const ssh_key pubkey,
ssh_string s;
size_t len;
int rc;
BIGNUM *pr = NULL, *ps = NULL;
sig = ssh_signature_new();
if (sig == NULL) {
@@ -1385,9 +1476,9 @@ ssh_signature pki_signature_from_blob(const ssh_key pubkey,
}
ssh_string_fill(r, ssh_string_data(sig_blob), 20);
sig->dsa_sig->r = ssh_make_string_bn(r);
pr = ssh_make_string_bn(r);
ssh_string_free(r);
if (sig->dsa_sig->r == NULL) {
if (pr == NULL) {
ssh_signature_free(sig);
return NULL;
}
@@ -1399,9 +1490,15 @@ ssh_signature pki_signature_from_blob(const ssh_key pubkey,
}
ssh_string_fill(s, (char *)ssh_string_data(sig_blob) + 20, 20);
sig->dsa_sig->s = ssh_make_string_bn(s);
ps = ssh_make_string_bn(s);
ssh_string_free(s);
if (sig->dsa_sig->s == NULL) {
if (ps == NULL) {
ssh_signature_free(sig);
return NULL;
}
rc = DSA_SIG_set0(sig->dsa_sig, pr, ps);
if (rc == 0) {
ssh_signature_free(sig);
return NULL;
}
@@ -1449,10 +1546,10 @@ ssh_signature pki_signature_from_blob(const ssh_key pubkey,
ssh_print_hexa("r", ssh_string_data(r), ssh_string_len(r));
#endif
ssh_make_string_bn_inplace(r, sig->ecdsa_sig->r);
pr = ssh_make_string_bn(r);
ssh_string_burn(r);
ssh_string_free(r);
if (sig->ecdsa_sig->r == NULL) {
if (pr == NULL) {
ssh_buffer_free(b);
ssh_signature_free(sig);
return NULL;
@@ -1470,10 +1567,16 @@ ssh_signature pki_signature_from_blob(const ssh_key pubkey,
ssh_print_hexa("s", ssh_string_data(s), ssh_string_len(s));
#endif
ssh_make_string_bn_inplace(s, sig->ecdsa_sig->s);
ps = ssh_make_string_bn(s);
ssh_string_burn(s);
ssh_string_free(s);
if (sig->ecdsa_sig->s == NULL) {
if (ps == NULL) {
ssh_signature_free(sig);
return NULL;
}
rc = ECDSA_SIG_set0(sig->ecdsa_sig, pr, ps);
if (rc == 0) {
ssh_signature_free(sig);
return NULL;
}
@@ -1601,8 +1704,12 @@ ssh_signature pki_do_sign(const ssh_key privkey,
}
#ifdef DEBUG_CRYPTO
ssh_print_bignum("r", sig->dsa_sig->r);
ssh_print_bignum("s", sig->dsa_sig->s);
{
const BIGNUM *pr, *ps;
DSA_SIG_get0(sig->dsa_sig, &pr, &ps);
ssh_print_bignum("r", (BIGNUM *) pr);
ssh_print_bignum("s", (BIGNUM *) ps);
}
#endif
break;
@@ -1624,8 +1731,12 @@ ssh_signature pki_do_sign(const ssh_key privkey,
}
# ifdef DEBUG_CRYPTO
ssh_print_bignum("r", sig->ecdsa_sig->r);
ssh_print_bignum("s", sig->ecdsa_sig->s);
{
const BIGNUM *pr, *ps;
ECDSA_SIG_get0(sig->ecdsa_sig, &pr, &ps);
ssh_print_bignum("r", (BIGNUM *) pr);
ssh_print_bignum("s", (BIGNUM *) ps);
}
# endif /* DEBUG_CRYPTO */
break;