/*
- * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
#include <openssl/x509v3.h>
#include <openssl/dh.h>
#include <openssl/bn.h>
+#include "internal/nelem.h"
#include "ssl_locl.h"
#include <openssl/ct.h>
TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
tls13_alert_code,
- tls1_export_keying_material,
+ tls13_export_keying_material,
SSL_ENC_FLAG_SIGALGS | SSL_ENC_FLAG_SHA256_PRF,
ssl3_set_handshake_header,
tls_close_construct_packet,
int tls1_new(SSL *s)
{
if (!ssl3_new(s))
- return (0);
- s->method->ssl_clear(s);
- return (1);
+ return 0;
+ if (!s->method->ssl_clear(s))
+ return 0;
+
+ return 1;
}
void tls1_free(SSL *s)
ssl3_free(s);
}
-void tls1_clear(SSL *s)
+int tls1_clear(SSL *s)
{
- ssl3_clear(s);
+ if (!ssl3_clear(s))
+ return 0;
+
if (s->method->version == TLS_ANY_VERSION)
s->version = TLS_MAX_VERSION;
else
s->version = s->method->version;
+
+ return 1;
}
#ifndef OPENSSL_NO_EC
-typedef struct {
- int nid; /* Curve NID */
- int secbits; /* Bits of security (from SP800-57) */
- unsigned int flags; /* Flags: currently just field type */
-} tls_curve_info;
-
/*
* Table of curve information.
* Do not delete entries or reorder this array! It is used as a lookup
* table: the index of each entry is one less than the TLS curve id.
*/
-static const tls_curve_info nid_list[] = {
+static const TLS_GROUP_INFO nid_list[] = {
{NID_sect163k1, 80, TLS_CURVE_CHAR2}, /* sect163k1 (1) */
{NID_sect163r1, 80, TLS_CURVE_CHAR2}, /* sect163r1 (2) */
{NID_sect163r2, 80, TLS_CURVE_CHAR2}, /* sect163r2 (3) */
{NID_brainpoolP256r1, 128, TLS_CURVE_PRIME}, /* brainpoolP256r1 (26) */
{NID_brainpoolP384r1, 192, TLS_CURVE_PRIME}, /* brainpoolP384r1 (27) */
{NID_brainpoolP512r1, 256, TLS_CURVE_PRIME}, /* brainpool512r1 (28) */
- {NID_X25519, 128, TLS_CURVE_CUSTOM}, /* X25519 (29) */
+ {EVP_PKEY_X25519, 128, TLS_CURVE_CUSTOM}, /* X25519 (29) */
};
static const unsigned char ecformats_default[] = {
};
/* The default curves */
-static const unsigned char eccurves_default[] = {
- 0, 29, /* X25519 (29) */
- 0, 23, /* secp256r1 (23) */
- 0, 25, /* secp521r1 (25) */
- 0, 24, /* secp384r1 (24) */
+static const uint16_t eccurves_default[] = {
+ 29, /* X25519 (29) */
+ 23, /* secp256r1 (23) */
+ 25, /* secp521r1 (25) */
+ 24, /* secp384r1 (24) */
};
-static const unsigned char suiteb_curves[] = {
- 0, TLSEXT_curve_P_256,
- 0, TLSEXT_curve_P_384
+static const uint16_t suiteb_curves[] = {
+ TLSEXT_curve_P_256,
+ TLSEXT_curve_P_384
};
-int tls1_ec_curve_id2nid(int curve_id, unsigned int *pflags)
+const TLS_GROUP_INFO *tls1_group_id_lookup(uint16_t group_id)
{
- const tls_curve_info *cinfo;
/* ECC curves from RFC 4492 and RFC 7027 */
- if ((curve_id < 1) || ((unsigned int)curve_id > OSSL_NELEM(nid_list)))
- return 0;
- cinfo = nid_list + curve_id - 1;
- if (pflags)
- *pflags = cinfo->flags;
- return cinfo->nid;
+ if (group_id < 1 || group_id > OSSL_NELEM(nid_list))
+ return NULL;
+ return &nid_list[group_id - 1];
}
-int tls1_ec_nid2curve_id(int nid)
+static uint16_t tls1_nid2group_id(int nid)
{
size_t i;
for (i = 0; i < OSSL_NELEM(nid_list); i++) {
if (nid_list[i].nid == nid)
- return (int)(i + 1);
+ return (uint16_t)(i + 1);
}
return 0;
}
/*
- * Get curves list, if "sess" is set return client curves otherwise
- * preferred list.
- * Sets |num_curves| to the number of curves in the list, i.e.,
- * the length of |pcurves| is 2 * num_curves.
- * Returns 1 on success and 0 if the client curves list has invalid format.
- * The latter indicates an internal error: we should not be accepting such
- * lists in the first place.
- * TODO(emilia): we should really be storing the curves list in explicitly
- * parsed form instead. (However, this would affect binary compatibility
- * so cannot happen in the 1.0.x series.)
+ * Set *pgroups to the supported groups list and *pgroupslen to
+ * the number of groups supported.
*/
-int tls1_get_curvelist(SSL *s, int sess, const unsigned char **pcurves,
- size_t *num_curves)
+void tls1_get_supported_groups(SSL *s, const uint16_t **pgroups,
+ size_t *pgroupslen)
{
- size_t pcurveslen = 0;
- if (sess) {
- *pcurves = s->session->ext.supportedgroups;
- pcurveslen = s->session->ext.supportedgroups_len;
- } else {
- /* For Suite B mode only include P-256, P-384 */
- switch (tls1_suiteb(s)) {
- case SSL_CERT_FLAG_SUITEB_128_LOS:
- *pcurves = suiteb_curves;
- pcurveslen = sizeof(suiteb_curves);
- break;
+ /* For Suite B mode only include P-256, P-384 */
+ switch (tls1_suiteb(s)) {
+ case SSL_CERT_FLAG_SUITEB_128_LOS:
+ *pgroups = suiteb_curves;
+ *pgroupslen = OSSL_NELEM(suiteb_curves);
+ break;
- case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
- *pcurves = suiteb_curves;
- pcurveslen = 2;
- break;
+ case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
+ *pgroups = suiteb_curves;
+ *pgroupslen = 1;
+ break;
- case SSL_CERT_FLAG_SUITEB_192_LOS:
- *pcurves = suiteb_curves + 2;
- pcurveslen = 2;
- break;
- default:
- *pcurves = s->ext.supportedgroups;
- pcurveslen = s->ext.supportedgroups_len;
- }
- if (!*pcurves) {
- *pcurves = eccurves_default;
- pcurveslen = sizeof(eccurves_default);
- }
- }
+ case SSL_CERT_FLAG_SUITEB_192_LOS:
+ *pgroups = suiteb_curves + 1;
+ *pgroupslen = 1;
+ break;
- /* We do not allow odd length arrays to enter the system. */
- if (pcurveslen & 1) {
- SSLerr(SSL_F_TLS1_GET_CURVELIST, ERR_R_INTERNAL_ERROR);
- *num_curves = 0;
- return 0;
+ default:
+ if (s->ext.supportedgroups == NULL) {
+ *pgroups = eccurves_default;
+ *pgroupslen = OSSL_NELEM(eccurves_default);
+ } else {
+ *pgroups = s->ext.supportedgroups;
+ *pgroupslen = s->ext.supportedgroups_len;
+ }
+ break;
}
- *num_curves = pcurveslen / 2;
- return 1;
}
/* See if curve is allowed by security callback */
-int tls_curve_allowed(SSL *s, const unsigned char *curve, int op)
+int tls_curve_allowed(SSL *s, uint16_t curve, int op)
{
- const tls_curve_info *cinfo;
- if (curve[0])
- return 1;
- if ((curve[1] < 1) || ((size_t)curve[1] > OSSL_NELEM(nid_list)))
+ const TLS_GROUP_INFO *cinfo = tls1_group_id_lookup(curve);
+ unsigned char ctmp[2];
+
+ if (cinfo == NULL)
return 0;
- cinfo = &nid_list[curve[1] - 1];
# ifdef OPENSSL_NO_EC2M
if (cinfo->flags & TLS_CURVE_CHAR2)
return 0;
# endif
- return ssl_security(s, op, cinfo->secbits, cinfo->nid, (void *)curve);
+ ctmp[0] = curve >> 8;
+ ctmp[1] = curve & 0xff;
+ return ssl_security(s, op, cinfo->secbits, cinfo->nid, (void *)ctmp);
}
-/* Check a curve is one of our preferences */
-int tls1_check_curve(SSL *s, const unsigned char *p, size_t len)
+/* Return 1 if "id" is in "list" */
+static int tls1_in_list(uint16_t id, const uint16_t *list, size_t listlen)
{
- const unsigned char *curves;
- size_t num_curves, i;
- unsigned int suiteb_flags = tls1_suiteb(s);
- if (len != 3 || p[0] != NAMED_CURVE_TYPE)
- return 0;
- /* Check curve matches Suite B preferences */
- if (suiteb_flags) {
- unsigned long cid = s->s3->tmp.new_cipher->id;
- if (p[1])
- return 0;
- if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256) {
- if (p[2] != TLSEXT_curve_P_256)
- return 0;
- } else if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384) {
- if (p[2] != TLSEXT_curve_P_384)
- return 0;
- } else /* Should never happen */
- return 0;
- }
- if (!tls1_get_curvelist(s, 0, &curves, &num_curves))
- return 0;
- for (i = 0; i < num_curves; i++, curves += 2) {
- if (p[1] == curves[0] && p[2] == curves[1])
- return tls_curve_allowed(s, p + 1, SSL_SECOP_CURVE_CHECK);
- }
+ size_t i;
+ for (i = 0; i < listlen; i++)
+ if (list[i] == id)
+ return 1;
return 0;
}
/*-
- * For nmatch >= 0, return the NID of the |nmatch|th shared group or NID_undef
+ * For nmatch >= 0, return the id of the |nmatch|th shared group or 0
* if there is no match.
* For nmatch == -1, return number of matches
- * For nmatch == -2, return the NID of the group to use for
- * an EC tmp key, or NID_undef if there is no match.
+ * For nmatch == -2, return the id of the group to use for
+ * a tmp key, or 0 if there is no match.
*/
-int tls1_shared_group(SSL *s, int nmatch)
+uint16_t tls1_shared_group(SSL *s, int nmatch)
{
- const unsigned char *pref, *supp;
- size_t num_pref, num_supp, i, j;
+ const uint16_t *pref, *supp;
+ size_t num_pref, num_supp, i;
int k;
/* Can't do anything on client side */
if (s->server == 0)
- return -1;
+ return 0;
if (nmatch == -2) {
if (tls1_suiteb(s)) {
/*
unsigned long cid = s->s3->tmp.new_cipher->id;
if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256)
- return NID_X9_62_prime256v1; /* P-256 */
+ return TLSEXT_curve_P_256;
if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384)
- return NID_secp384r1; /* P-384 */
+ return TLSEXT_curve_P_384;
/* Should never happen */
- return NID_undef;
+ return 0;
}
/* If not Suite B just return first preference shared curve */
nmatch = 0;
}
/*
- * Avoid truncation. tls1_get_curvelist takes an int
- * but s->options is a long...
+ * If server preference set, our groups are the preference order
+ * otherwise peer decides.
*/
- if (!tls1_get_curvelist(s,
- (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) != 0,
- &supp, &num_supp))
- /* In practice, NID_undef == 0 but let's be precise. */
- return nmatch == -1 ? 0 : NID_undef;
- if (!tls1_get_curvelist(s,
- (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) == 0,
- &pref, &num_pref))
- return nmatch == -1 ? 0 : NID_undef;
-
- for (k = 0, i = 0; i < num_pref; i++, pref += 2) {
- const unsigned char *tsupp = supp;
-
- for (j = 0; j < num_supp; j++, tsupp += 2) {
- if (pref[0] == tsupp[0] && pref[1] == tsupp[1]) {
- if (!tls_curve_allowed(s, pref, SSL_SECOP_CURVE_SHARED))
- continue;
- if (nmatch == k) {
- int id = (pref[0] << 8) | pref[1];
+ if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) {
+ tls1_get_supported_groups(s, &pref, &num_pref);
+ tls1_get_peer_groups(s, &supp, &num_supp);
+ } else {
+ tls1_get_peer_groups(s, &pref, &num_pref);
+ tls1_get_supported_groups(s, &supp, &num_supp);
+ }
- return tls1_ec_curve_id2nid(id, NULL);
- }
- k++;
- }
- }
+ for (k = 0, i = 0; i < num_pref; i++) {
+ uint16_t id = pref[i];
+
+ if (!tls1_in_list(id, supp, num_supp)
+ || !tls_curve_allowed(s, id, SSL_SECOP_CURVE_SHARED))
+ continue;
+ if (nmatch == k)
+ return id;
+ k++;
}
if (nmatch == -1)
return k;
/* Out of range (nmatch > k). */
- return NID_undef;
+ return 0;
}
-int tls1_set_groups(unsigned char **pext, size_t *pextlen,
+int tls1_set_groups(uint16_t **pext, size_t *pextlen,
int *groups, size_t ngroups)
{
- unsigned char *glist, *p;
+ uint16_t *glist;
size_t i;
/*
* Bitmap of groups included to detect duplicates: only works while group
* ids < 32
*/
unsigned long dup_list = 0;
- glist = OPENSSL_malloc(ngroups * 2);
+ glist = OPENSSL_malloc(ngroups * sizeof(*glist));
if (glist == NULL)
return 0;
- for (i = 0, p = glist; i < ngroups; i++) {
+ for (i = 0; i < ngroups; i++) {
unsigned long idmask;
- int id;
+ uint16_t id;
/* TODO(TLS1.3): Convert for DH groups */
- id = tls1_ec_nid2curve_id(groups[i]);
+ id = tls1_nid2group_id(groups[i]);
idmask = 1L << id;
if (!id || (dup_list & idmask)) {
OPENSSL_free(glist);
return 0;
}
dup_list |= idmask;
- s2n(id, p);
+ glist[i] = id;
}
OPENSSL_free(*pext);
*pext = glist;
- *pextlen = ngroups * 2;
+ *pextlen = ngroups;
return 1;
}
}
/* Set groups based on a colon separate list */
-int tls1_set_groups_list(unsigned char **pext, size_t *pextlen, const char *str)
+int tls1_set_groups_list(uint16_t **pext, size_t *pextlen, const char *str)
{
nid_cb_st ncb;
ncb.nidcnt = 0;
return 1;
return tls1_set_groups(pext, pextlen, ncb.nid_arr, ncb.nidcnt);
}
-
-/* For an EC key set TLS id and required compression based on parameters */
-static int tls1_set_ec_id(unsigned char *curve_id, unsigned char *comp_id,
- EC_KEY *ec)
+/* Return group id of a key */
+static uint16_t tls1_get_group_id(EVP_PKEY *pkey)
{
- int id;
+ EC_KEY *ec = EVP_PKEY_get0_EC_KEY(pkey);
const EC_GROUP *grp;
- if (!ec)
+
+ if (ec == NULL)
return 0;
- /* Determine if it is a prime field */
grp = EC_KEY_get0_group(ec);
- if (!grp)
- return 0;
- /* Determine curve ID */
- id = EC_GROUP_get_curve_name(grp);
- id = tls1_ec_nid2curve_id(id);
- /* If no id return error: we don't support arbitrary explicit curves */
- if (id == 0)
- return 0;
- curve_id[0] = 0;
- curve_id[1] = (unsigned char)id;
- if (comp_id) {
- if (EC_KEY_get0_public_key(ec) == NULL)
- return 0;
- if (EC_KEY_get_conv_form(ec) == POINT_CONVERSION_UNCOMPRESSED) {
- *comp_id = TLSEXT_ECPOINTFORMAT_uncompressed;
- } else {
- if ((nid_list[id - 1].flags & TLS_CURVE_TYPE) == TLS_CURVE_PRIME)
- *comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
- else
- *comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
- }
- }
- return 1;
+ return tls1_nid2group_id(EC_GROUP_get_curve_name(grp));
}
-/* Check an EC key is compatible with extensions */
-static int tls1_check_ec_key(SSL *s,
- unsigned char *curve_id, unsigned char *comp_id)
+/* Check a key is compatible with compression extension */
+static int tls1_check_pkey_comp(SSL *s, EVP_PKEY *pkey)
{
- const unsigned char *pformats, *pcurves;
- size_t num_formats, num_curves, i;
- int j;
+ const EC_KEY *ec;
+ const EC_GROUP *grp;
+ unsigned char comp_id;
+ size_t i;
+
+ /* If not an EC key nothing to check */
+ if (EVP_PKEY_id(pkey) != EVP_PKEY_EC)
+ return 1;
+ ec = EVP_PKEY_get0_EC_KEY(pkey);
+ grp = EC_KEY_get0_group(ec);
+
+ /* Get required compression id */
+ if (EC_KEY_get_conv_form(ec) == POINT_CONVERSION_UNCOMPRESSED) {
+ comp_id = TLSEXT_ECPOINTFORMAT_uncompressed;
+ } else if (SSL_IS_TLS13(s)) {
+ /* Compression not allowed in TLS 1.3 */
+ return 0;
+ } else {
+ int field_type = EC_METHOD_get_field_type(EC_GROUP_method_of(grp));
+
+ if (field_type == NID_X9_62_prime_field)
+ comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
+ else if (field_type == NID_X9_62_characteristic_two_field)
+ comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
+ else
+ return 0;
+ }
/*
* If point formats extension present check it, otherwise everything is
* supported (see RFC4492).
*/
- if (comp_id && s->session->ext.ecpointformats) {
- pformats = s->session->ext.ecpointformats;
- num_formats = s->session->ext.ecpointformats_len;
- for (i = 0; i < num_formats; i++, pformats++) {
- if (*comp_id == *pformats)
- break;
- }
- if (i == num_formats)
- return 0;
- }
- if (!curve_id)
+ if (s->session->ext.ecpointformats == NULL)
return 1;
- /* Check curve is consistent with client and server preferences */
- for (j = 0; j <= 1; j++) {
- if (!tls1_get_curvelist(s, j, &pcurves, &num_curves))
+
+ for (i = 0; i < s->session->ext.ecpointformats_len; i++) {
+ if (s->session->ext.ecpointformats[i] == comp_id)
+ return 1;
+ }
+ return 0;
+}
+
+/* Check a group id matches preferences */
+int tls1_check_group_id(SSL *s, uint16_t group_id)
+ {
+ const uint16_t *groups;
+ size_t groups_len;
+
+ if (group_id == 0)
+ return 0;
+
+ /* Check for Suite B compliance */
+ if (tls1_suiteb(s) && s->s3->tmp.new_cipher != NULL) {
+ unsigned long cid = s->s3->tmp.new_cipher->id;
+
+ if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256) {
+ if (group_id != TLSEXT_curve_P_256)
+ return 0;
+ } else if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384) {
+ if (group_id != TLSEXT_curve_P_384)
+ return 0;
+ } else {
+ /* Should never happen */
return 0;
- if (j == 1 && num_curves == 0) {
- /*
- * If we've not received any curves then skip this check.
- * RFC 4492 does not require the supported elliptic curves extension
- * so if it is not sent we can just choose any curve.
- * It is invalid to send an empty list in the elliptic curves
- * extension, so num_curves == 0 always means no extension.
- */
- break;
- }
- for (i = 0; i < num_curves; i++, pcurves += 2) {
- if (pcurves[0] == curve_id[0] && pcurves[1] == curve_id[1])
- break;
}
- if (i == num_curves)
- return 0;
- /* For clients can only check sent curve list */
- if (!s->server)
- break;
}
- return 1;
+
+ /* Check group is one of our preferences */
+ tls1_get_supported_groups(s, &groups, &groups_len);
+ if (!tls1_in_list(group_id, groups, groups_len))
+ return 0;
+
+ if (!tls_curve_allowed(s, group_id, SSL_SECOP_CURVE_CHECK))
+ return 0;
+
+ /* For clients, nothing more to check */
+ if (!s->server)
+ return 1;
+
+ /* Check group is one of peers preferences */
+ tls1_get_peer_groups(s, &groups, &groups_len);
+
+ /*
+ * RFC 4492 does not require the supported elliptic curves extension
+ * so if it is not sent we can just choose any curve.
+ * It is invalid to send an empty list in the supported groups
+ * extension, so groups_len == 0 always means no extension.
+ */
+ if (groups_len == 0)
+ return 1;
+ return tls1_in_list(group_id, groups, groups_len);
}
void tls1_get_formatlist(SSL *s, const unsigned char **pformats,
* Check cert parameters compatible with extensions: currently just checks EC
* certificates have compatible curves and compression.
*/
-static int tls1_check_cert_param(SSL *s, X509 *x, int set_ee_md)
+static int tls1_check_cert_param(SSL *s, X509 *x, int check_ee_md)
{
- unsigned char comp_id, curve_id[2];
+ uint16_t group_id;
EVP_PKEY *pkey;
- int rv;
pkey = X509_get0_pubkey(x);
- if (!pkey)
+ if (pkey == NULL)
return 0;
/* If not EC nothing to do */
if (EVP_PKEY_id(pkey) != EVP_PKEY_EC)
return 1;
- rv = tls1_set_ec_id(curve_id, &comp_id, EVP_PKEY_get0_EC_KEY(pkey));
- if (!rv)
+ /* Check compression */
+ if (!tls1_check_pkey_comp(s, pkey))
return 0;
- /*
- * Can't check curve_id for client certs as we don't have a supported
- * curves extension.
- */
- rv = tls1_check_ec_key(s, s->server ? curve_id : NULL, &comp_id);
- if (!rv)
+ group_id = tls1_get_group_id(pkey);
+ if (!tls1_check_group_id(s, group_id))
return 0;
/*
* Special case for suite B. We *MUST* sign using SHA256+P-256 or
- * SHA384+P-384, adjust digest if necessary.
+ * SHA384+P-384.
*/
- if (set_ee_md && tls1_suiteb(s)) {
+ if (check_ee_md && tls1_suiteb(s)) {
int check_md;
size_t i;
CERT *c = s->cert;
- if (curve_id[0])
- return 0;
+
/* Check to see we have necessary signing algorithm */
- if (curve_id[1] == TLSEXT_curve_P_256)
+ if (group_id == TLSEXT_curve_P_256)
check_md = NID_ecdsa_with_SHA256;
- else if (curve_id[1] == TLSEXT_curve_P_384)
+ else if (group_id == TLSEXT_curve_P_384)
check_md = NID_ecdsa_with_SHA384;
else
return 0; /* Should never happen */
- for (i = 0; i < c->shared_sigalgslen; i++)
- if (check_md == c->shared_sigalgs[i].signandhash_nid)
- break;
- if (i == c->shared_sigalgslen)
- return 0;
- if (set_ee_md == 2) {
- if (check_md == NID_ecdsa_with_SHA256)
- s->s3->tmp.md[SSL_PKEY_ECC] = EVP_sha256();
- else
- s->s3->tmp.md[SSL_PKEY_ECC] = EVP_sha384();
+ for (i = 0; i < c->shared_sigalgslen; i++) {
+ if (check_md == c->shared_sigalgs[i]->sigandhash)
+ return 1;;
}
+ return 0;
}
- return rv;
+ return 1;
}
-# ifndef OPENSSL_NO_EC
/*
* tls1_check_ec_tmp_key - Check EC temporary key compatibility
* @s: SSL connection
*/
int tls1_check_ec_tmp_key(SSL *s, unsigned long cid)
{
+ /* If not Suite B just need a shared group */
+ if (!tls1_suiteb(s))
+ return tls1_shared_group(s, 0) != 0;
/*
* If Suite B, AES128 MUST use P-256 and AES256 MUST use P-384, no other
* curves permitted.
*/
- if (tls1_suiteb(s)) {
- unsigned char curve_id[2];
- /* Curve to check determined by ciphersuite */
- if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256)
- curve_id[1] = TLSEXT_curve_P_256;
- else if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384)
- curve_id[1] = TLSEXT_curve_P_384;
- else
- return 0;
- curve_id[0] = 0;
- /* Check this curve is acceptable */
- if (!tls1_check_ec_key(s, curve_id, NULL))
- return 0;
- return 1;
- }
- /* Need a shared curve */
- if (tls1_shared_group(s, 0))
- return 1;
+ if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256)
+ return tls1_check_group_id(s, TLSEXT_curve_P_256);
+ if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384)
+ return tls1_check_group_id(s, TLSEXT_curve_P_384);
+
return 0;
}
-# endif /* OPENSSL_NO_EC */
#else
#endif /* OPENSSL_NO_EC */
/* Default sigalg schemes */
-static const unsigned int tls12_sigalgs[] = {
+static const uint16_t tls12_sigalgs[] = {
#ifndef OPENSSL_NO_EC
TLSEXT_SIGALG_ecdsa_secp256r1_sha256,
TLSEXT_SIGALG_ecdsa_secp384r1_sha384,
TLSEXT_SIGALG_ecdsa_secp521r1_sha512,
+ TLSEXT_SIGALG_ed25519,
#endif
TLSEXT_SIGALG_rsa_pss_sha256,
TLSEXT_SIGALG_rsa_pkcs1_sha512,
#ifndef OPENSSL_NO_EC
+ TLSEXT_SIGALG_ecdsa_sha224,
TLSEXT_SIGALG_ecdsa_sha1,
#endif
+ TLSEXT_SIGALG_rsa_pkcs1_sha224,
TLSEXT_SIGALG_rsa_pkcs1_sha1,
#ifndef OPENSSL_NO_DSA
+ TLSEXT_SIGALG_dsa_sha224,
TLSEXT_SIGALG_dsa_sha1,
TLSEXT_SIGALG_dsa_sha256,
};
#ifndef OPENSSL_NO_EC
-static const unsigned int suiteb_sigalgs[] = {
+static const uint16_t suiteb_sigalgs[] = {
TLSEXT_SIGALG_ecdsa_secp256r1_sha256,
TLSEXT_SIGALG_ecdsa_secp384r1_sha384
};
#endif
-typedef struct sigalg_lookup_st {
- unsigned int sigalg;
- int hash;
- int sig;
-} SIGALG_LOOKUP;
-
static const SIGALG_LOOKUP sigalg_lookup_tbl[] = {
#ifndef OPENSSL_NO_EC
- {TLSEXT_SIGALG_ecdsa_secp256r1_sha256, NID_sha256, EVP_PKEY_EC},
- {TLSEXT_SIGALG_ecdsa_secp384r1_sha384, NID_sha384, EVP_PKEY_EC},
- {TLSEXT_SIGALG_ecdsa_secp521r1_sha512, NID_sha512, EVP_PKEY_EC},
- {TLSEXT_SIGALG_ecdsa_sha1, NID_sha1, EVP_PKEY_EC},
+ {"ecdsa_secp256r1_sha256", TLSEXT_SIGALG_ecdsa_secp256r1_sha256,
+ NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
+ NID_ecdsa_with_SHA256, NID_X9_62_prime256v1},
+ {"ecdsa_secp384r1_sha384", TLSEXT_SIGALG_ecdsa_secp384r1_sha384,
+ NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
+ NID_ecdsa_with_SHA384, NID_secp384r1},
+ {"ecdsa_secp521r1_sha512", TLSEXT_SIGALG_ecdsa_secp521r1_sha512,
+ NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
+ NID_ecdsa_with_SHA512, NID_secp521r1},
+ {"ed25519", TLSEXT_SIGALG_ed25519,
+ NID_undef, -1, EVP_PKEY_ED25519, SSL_PKEY_ED25519,
+ NID_undef, NID_undef},
+ {NULL, TLSEXT_SIGALG_ecdsa_sha224,
+ NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
+ NID_ecdsa_with_SHA224, NID_undef},
+ {NULL, TLSEXT_SIGALG_ecdsa_sha1,
+ NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
+ NID_ecdsa_with_SHA1, NID_undef},
#endif
- /*
- * PSS must appear before PKCS1 so that we prefer that when signing where
- * possible
- */
- {TLSEXT_SIGALG_rsa_pss_sha256, NID_sha256, EVP_PKEY_RSA},
- {TLSEXT_SIGALG_rsa_pss_sha384, NID_sha384, EVP_PKEY_RSA},
- {TLSEXT_SIGALG_rsa_pss_sha512, NID_sha512, EVP_PKEY_RSA},
- {TLSEXT_SIGALG_rsa_pkcs1_sha256, NID_sha256, EVP_PKEY_RSA},
- {TLSEXT_SIGALG_rsa_pkcs1_sha384, NID_sha384, EVP_PKEY_RSA},
- {TLSEXT_SIGALG_rsa_pkcs1_sha512, NID_sha512, EVP_PKEY_RSA},
- {TLSEXT_SIGALG_rsa_pkcs1_sha1, NID_sha1, EVP_PKEY_RSA},
+ {"rsa_pss_sha256", TLSEXT_SIGALG_rsa_pss_sha256,
+ NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN,
+ NID_undef, NID_undef},
+ {"rsa_pss_sha384", TLSEXT_SIGALG_rsa_pss_sha384,
+ NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN,
+ NID_undef, NID_undef},
+ {"rsa_pss_sha512", TLSEXT_SIGALG_rsa_pss_sha512,
+ NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN,
+ NID_undef, NID_undef},
+ {"rsa_pkcs1_sha256", TLSEXT_SIGALG_rsa_pkcs1_sha256,
+ NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA,
+ NID_sha256WithRSAEncryption, NID_undef},
+ {"rsa_pkcs1_sha384", TLSEXT_SIGALG_rsa_pkcs1_sha384,
+ NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA,
+ NID_sha384WithRSAEncryption, NID_undef},
+ {"rsa_pkcs1_sha512", TLSEXT_SIGALG_rsa_pkcs1_sha512,
+ NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA,
+ NID_sha512WithRSAEncryption, NID_undef},
+ {"rsa_pkcs1_sha224", TLSEXT_SIGALG_rsa_pkcs1_sha224,
+ NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA,
+ NID_sha224WithRSAEncryption, NID_undef},
+ {"rsa_pkcs1_sha1", TLSEXT_SIGALG_rsa_pkcs1_sha1,
+ NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA,
+ NID_sha1WithRSAEncryption, NID_undef},
#ifndef OPENSSL_NO_DSA
- {TLSEXT_SIGALG_dsa_sha256, NID_sha256, EVP_PKEY_DSA},
- {TLSEXT_SIGALG_dsa_sha384, NID_sha384, EVP_PKEY_DSA},
- {TLSEXT_SIGALG_dsa_sha512, NID_sha512, EVP_PKEY_DSA},
- {TLSEXT_SIGALG_dsa_sha1, NID_sha1, EVP_PKEY_DSA},
+ {NULL, TLSEXT_SIGALG_dsa_sha256,
+ NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN,
+ NID_dsa_with_SHA256, NID_undef},
+ {NULL, TLSEXT_SIGALG_dsa_sha384,
+ NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN,
+ NID_undef, NID_undef},
+ {NULL, TLSEXT_SIGALG_dsa_sha512,
+ NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN,
+ NID_undef, NID_undef},
+ {NULL, TLSEXT_SIGALG_dsa_sha224,
+ NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN,
+ NID_undef, NID_undef},
+ {NULL, TLSEXT_SIGALG_dsa_sha1,
+ NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN,
+ NID_dsaWithSHA1, NID_undef},
#endif
#ifndef OPENSSL_NO_GOST
- {TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256, NID_id_GostR3411_2012_256, NID_id_GostR3410_2012_256},
- {TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512, NID_id_GostR3411_2012_512, NID_id_GostR3410_2012_512},
- {TLSEXT_SIGALG_gostr34102001_gostr3411, NID_id_GostR3411_94, NID_id_GostR3410_2001}
+ {NULL, TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256,
+ NID_id_GostR3411_2012_256, SSL_MD_GOST12_256_IDX,
+ NID_id_GostR3410_2012_256, SSL_PKEY_GOST12_256,
+ NID_undef, NID_undef},
+ {NULL, TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512,
+ NID_id_GostR3411_2012_512, SSL_MD_GOST12_512_IDX,
+ NID_id_GostR3410_2012_512, SSL_PKEY_GOST12_512,
+ NID_undef, NID_undef},
+ {NULL, TLSEXT_SIGALG_gostr34102001_gostr3411,
+ NID_id_GostR3411_94, SSL_MD_GOST94_IDX,
+ NID_id_GostR3410_2001, SSL_PKEY_GOST01,
+ NID_undef, NID_undef}
#endif
};
+/* Legacy sigalgs for TLS < 1.2 RSA TLS signatures */
+static const SIGALG_LOOKUP legacy_rsa_sigalg = {
+ "rsa_pkcs1_md5_sha1", 0,
+ NID_md5_sha1, SSL_MD_MD5_SHA1_IDX,
+ EVP_PKEY_RSA, SSL_PKEY_RSA,
+ NID_undef, NID_undef
+};
+
+/*
+ * Default signature algorithm values used if signature algorithms not present.
+ * From RFC5246. Note: order must match certificate index order.
+ */
+static const uint16_t tls_default_sigalg[] = {
+ TLSEXT_SIGALG_rsa_pkcs1_sha1, /* SSL_PKEY_RSA */
+ 0, /* SSL_PKEY_RSA_PSS_SIGN */
+ TLSEXT_SIGALG_dsa_sha1, /* SSL_PKEY_DSA_SIGN */
+ TLSEXT_SIGALG_ecdsa_sha1, /* SSL_PKEY_ECC */
+ TLSEXT_SIGALG_gostr34102001_gostr3411, /* SSL_PKEY_GOST01 */
+ TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256, /* SSL_PKEY_GOST12_256 */
+ TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512, /* SSL_PKEY_GOST12_512 */
+ 0 /* SSL_PKEY_ED25519 */
+};
-static int tls_sigalg_get_hash(unsigned int sigalg)
+/* Lookup TLS signature algorithm */
+static const SIGALG_LOOKUP *tls1_lookup_sigalg(uint16_t sigalg)
{
size_t i;
- const SIGALG_LOOKUP *curr;
+ const SIGALG_LOOKUP *s;
- for (i = 0, curr = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl);
- i++, curr++) {
- if (curr->sigalg == sigalg)
- return curr->hash;
+ for (i = 0, s = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl);
+ i++, s++) {
+ if (s->sigalg == sigalg)
+ return s;
+ }
+ return NULL;
+}
+/* Lookup hash: return 0 if invalid or not enabled */
+int tls1_lookup_md(const SIGALG_LOOKUP *lu, const EVP_MD **pmd)
+{
+ const EVP_MD *md;
+ if (lu == NULL)
+ return 0;
+ /* lu->hash == NID_undef means no associated digest */
+ if (lu->hash == NID_undef) {
+ md = NULL;
+ } else {
+ md = ssl_md(lu->hash_idx);
+ if (md == NULL)
+ return 0;
}
+ if (pmd)
+ *pmd = md;
+ return 1;
+}
- return 0;
+/*
+ * Check if key is large enough to generate RSA-PSS signature.
+ *
+ * The key must greater than or equal to 2 * hash length + 2.
+ * SHA512 has a hash length of 64 bytes, which is incompatible
+ * with a 128 byte (1024 bit) key.
+ */
+#define RSA_PSS_MINIMUM_KEY_SIZE(md) (2 * EVP_MD_size(md) + 2)
+static int rsa_pss_check_min_key_size(const RSA *rsa, const SIGALG_LOOKUP *lu)
+{
+ const EVP_MD *md;
+
+ if (rsa == NULL)
+ return 0;
+ if (!tls1_lookup_md(lu, &md) || md == NULL)
+ return 0;
+ if (RSA_size(rsa) < RSA_PSS_MINIMUM_KEY_SIZE(md))
+ return 0;
+ return 1;
}
-static int tls_sigalg_get_sig(unsigned int sigalg)
+/*
+ * Return a signature algorithm for TLS < 1.2 where the signature type
+ * is fixed by the certificate type.
+ */
+static const SIGALG_LOOKUP *tls1_get_legacy_sigalg(const SSL *s, int idx)
{
- size_t i;
- const SIGALG_LOOKUP *curr;
+ if (idx == -1) {
+ if (s->server) {
+ size_t i;
+
+ /* Work out index corresponding to ciphersuite */
+ for (i = 0; i < SSL_PKEY_NUM; i++) {
+ const SSL_CERT_LOOKUP *clu = ssl_cert_lookup_by_idx(i);
+
+ if (clu->amask & s->s3->tmp.new_cipher->algorithm_auth) {
+ idx = i;
+ break;
+ }
+ }
+ } else {
+ idx = s->cert->key - s->cert->pkeys;
+ }
+ }
+ if (idx < 0 || idx >= (int)OSSL_NELEM(tls_default_sigalg))
+ return NULL;
+ if (SSL_USE_SIGALGS(s) || idx != SSL_PKEY_RSA) {
+ const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(tls_default_sigalg[idx]);
- for (i = 0, curr = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl);
- i++, curr++) {
- if (curr->sigalg == sigalg)
- return curr->sig;
+ if (!tls1_lookup_md(lu, NULL))
+ return NULL;
+ return lu;
}
+ return &legacy_rsa_sigalg;
+}
+/* Set peer sigalg based key type */
+int tls1_set_peer_legacy_sigalg(SSL *s, const EVP_PKEY *pkey)
+{
+ size_t idx;
+ const SIGALG_LOOKUP *lu;
- return 0;
+ if (ssl_cert_lookup_by_pkey(pkey, &idx) == NULL)
+ return 0;
+ lu = tls1_get_legacy_sigalg(s, idx);
+ if (lu == NULL)
+ return 0;
+ s->s3->tmp.peer_sigalg = lu;
+ return 1;
}
-size_t tls12_get_psigalgs(SSL *s, int sent, const unsigned int **psigs)
+
+size_t tls12_get_psigalgs(SSL *s, int sent, const uint16_t **psigs)
{
/*
* If Suite B mode use Suite B sigalgs only, ignore any other
/*
* Check signature algorithm is consistent with sent supported signature
- * algorithms and if so return relevant digest.
+ * algorithms and if so set relevant digest and signature scheme in
+ * s.
*/
-int tls12_check_peer_sigalg(const EVP_MD **pmd, SSL *s, unsigned int sig,
- EVP_PKEY *pkey)
+int tls12_check_peer_sigalg(SSL *s, uint16_t sig, EVP_PKEY *pkey)
{
- const unsigned int *sent_sigs;
+ const uint16_t *sent_sigs;
+ const EVP_MD *md = NULL;
char sigalgstr[2];
size_t sent_sigslen, i;
int pkeyid = EVP_PKEY_id(pkey);
+ const SIGALG_LOOKUP *lu;
+
/* Should never happen */
if (pkeyid == -1)
return -1;
- /* Check key type is consistent with signature */
- if (pkeyid != tls_sigalg_get_sig(sig)) {
- SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_WRONG_SIGNATURE_TYPE);
+ if (SSL_IS_TLS13(s)) {
+ /* Disallow DSA for TLS 1.3 */
+ if (pkeyid == EVP_PKEY_DSA) {
+ SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS12_CHECK_PEER_SIGALG,
+ SSL_R_WRONG_SIGNATURE_TYPE);
+ return 0;
+ }
+ /* Only allow PSS for TLS 1.3 */
+ if (pkeyid == EVP_PKEY_RSA)
+ pkeyid = EVP_PKEY_RSA_PSS;
+ }
+ lu = tls1_lookup_sigalg(sig);
+ /*
+ * Check sigalgs is known. Disallow SHA1/SHA224 with TLS 1.3. Check key type
+ * is consistent with signature: RSA keys can be used for RSA-PSS
+ */
+ if (lu == NULL
+ || (SSL_IS_TLS13(s) && (lu->hash == NID_sha1 || lu->hash == NID_sha224))
+ || (pkeyid != lu->sig
+ && (lu->sig != EVP_PKEY_RSA_PSS || pkeyid != EVP_PKEY_RSA))) {
+ SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS12_CHECK_PEER_SIGALG,
+ SSL_R_WRONG_SIGNATURE_TYPE);
return 0;
}
#ifndef OPENSSL_NO_EC
if (pkeyid == EVP_PKEY_EC) {
- unsigned char curve_id[2], comp_id;
- /* Check compression and curve matches extensions */
- if (!tls1_set_ec_id(curve_id, &comp_id, EVP_PKEY_get0_EC_KEY(pkey)))
- return 0;
- if (!s->server && !tls1_check_ec_key(s, curve_id, &comp_id)) {
- SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_WRONG_CURVE);
+
+ /* Check point compression is permitted */
+ if (!tls1_check_pkey_comp(s, pkey)) {
+ SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
+ SSL_F_TLS12_CHECK_PEER_SIGALG,
+ SSL_R_ILLEGAL_POINT_COMPRESSION);
return 0;
}
- /* If Suite B only P-384+SHA384 or P-256+SHA-256 allowed */
- if (tls1_suiteb(s)) {
- if (curve_id[0])
+
+ /* For TLS 1.3 or Suite B check curve matches signature algorithm */
+ if (SSL_IS_TLS13(s) || tls1_suiteb(s)) {
+ EC_KEY *ec = EVP_PKEY_get0_EC_KEY(pkey);
+ int curve = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec));
+
+ if (lu->curve != NID_undef && curve != lu->curve) {
+ SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
+ SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_WRONG_CURVE);
return 0;
- if (curve_id[1] == TLSEXT_curve_P_256) {
- if (tls_sigalg_get_hash(sig) != NID_sha256) {
- SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG,
- SSL_R_ILLEGAL_SUITEB_DIGEST);
- return 0;
- }
- } else if (curve_id[1] == TLSEXT_curve_P_384) {
- if (tls_sigalg_get_hash(sig) != NID_sha384) {
- SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG,
- SSL_R_ILLEGAL_SUITEB_DIGEST);
+ }
+ }
+ if (!SSL_IS_TLS13(s)) {
+ /* Check curve matches extensions */
+ if (!tls1_check_group_id(s, tls1_get_group_id(pkey))) {
+ SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
+ SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_WRONG_CURVE);
+ return 0;
+ }
+ if (tls1_suiteb(s)) {
+ /* Check sigalg matches a permissible Suite B value */
+ if (sig != TLSEXT_SIGALG_ecdsa_secp256r1_sha256
+ && sig != TLSEXT_SIGALG_ecdsa_secp384r1_sha384) {
+ SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
+ SSL_F_TLS12_CHECK_PEER_SIGALG,
+ SSL_R_WRONG_SIGNATURE_TYPE);
return 0;
}
- } else
- return 0;
+ }
}
- } else if (tls1_suiteb(s))
+ } else if (tls1_suiteb(s)) {
+ SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS12_CHECK_PEER_SIGALG,
+ SSL_R_WRONG_SIGNATURE_TYPE);
return 0;
+ }
#endif
/* Check signature matches a type we sent */
break;
}
/* Allow fallback to SHA1 if not strict mode */
- if (i == sent_sigslen
- && (tls_sigalg_get_hash(sig) != NID_sha1
- || s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT)) {
- SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_WRONG_SIGNATURE_TYPE);
+ if (i == sent_sigslen && (lu->hash != NID_sha1
+ || s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT)) {
+ SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS12_CHECK_PEER_SIGALG,
+ SSL_R_WRONG_SIGNATURE_TYPE);
return 0;
}
- *pmd = tls12_get_hash(tls_sigalg_get_hash(sig));
- if (*pmd == NULL) {
- SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_UNKNOWN_DIGEST);
+ if (!tls1_lookup_md(lu, &md)) {
+ SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS12_CHECK_PEER_SIGALG,
+ SSL_R_UNKNOWN_DIGEST);
return 0;
}
- /*
- * Make sure security callback allows algorithm. For historical reasons we
- * have to pass the sigalg as a two byte char array.
- */
- sigalgstr[0] = (sig >> 8) & 0xff;
- sigalgstr[1] = sig & 0xff;
- if (!ssl_security(s, SSL_SECOP_SIGALG_CHECK,
- EVP_MD_size(*pmd) * 4, EVP_MD_type(*pmd),
- (void *)sigalgstr)) {
- SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_WRONG_SIGNATURE_TYPE);
- return 0;
+ if (md != NULL) {
+ /*
+ * Make sure security callback allows algorithm. For historical
+ * reasons we have to pass the sigalg as a two byte char array.
+ */
+ sigalgstr[0] = (sig >> 8) & 0xff;
+ sigalgstr[1] = sig & 0xff;
+ if (!ssl_security(s, SSL_SECOP_SIGALG_CHECK,
+ EVP_MD_size(md) * 4, EVP_MD_type(md),
+ (void *)sigalgstr)) {
+ SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS12_CHECK_PEER_SIGALG,
+ SSL_R_WRONG_SIGNATURE_TYPE);
+ return 0;
+ }
}
- /*
- * Store the digest used so applications can retrieve it if they wish.
- */
- s->s3->tmp.peer_md = *pmd;
+ /* Store the sigalg the peer uses */
+ s->s3->tmp.peer_sigalg = lu;
+ return 1;
+}
+
+int SSL_get_peer_signature_type_nid(const SSL *s, int *pnid)
+{
+ if (s->s3->tmp.peer_sigalg == NULL)
+ return 0;
+ *pnid = s->s3->tmp.peer_sigalg->sig;
return 1;
}
s->s3->tmp.mask_a = 0;
s->s3->tmp.mask_k = 0;
ssl_set_sig_mask(&s->s3->tmp.mask_a, s, SSL_SECOP_SIGALG_MASK);
- ssl_get_client_min_max_version(s, &s->s3->tmp.min_ver, &s->s3->tmp.max_ver);
+ ssl_get_min_max_version(s, &s->s3->tmp.min_ver, &s->s3->tmp.max_ver);
#ifndef OPENSSL_NO_PSK
/* with PSK there must be client callback set */
if (!s->psk_client_callback) {
* @s: SSL connection that you want to use the cipher on
* @c: cipher to check
* @op: Security check that you want to do
+ * @ecdhe: If set to 1 then TLSv1 ECDHE ciphers are also allowed in SSLv3
*
* Returns 1 when it's disabled, 0 when enabled.
*/
-int ssl_cipher_disabled(SSL *s, const SSL_CIPHER *c, int op)
+int ssl_cipher_disabled(SSL *s, const SSL_CIPHER *c, int op, int ecdhe)
{
if (c->algorithm_mkey & s->s3->tmp.mask_k
|| c->algorithm_auth & s->s3->tmp.mask_a)
return 1;
if (s->s3->tmp.max_ver == 0)
return 1;
- if (!SSL_IS_DTLS(s) && ((c->min_tls > s->s3->tmp.max_ver)
- || (c->max_tls < s->s3->tmp.min_ver)))
- return 1;
+ if (!SSL_IS_DTLS(s)) {
+ int min_tls = c->min_tls;
+
+ /*
+ * For historical reasons we will allow ECHDE to be selected by a server
+ * in SSLv3 if we are a client
+ */
+ if (min_tls == TLS1_VERSION && ecdhe
+ && (c->algorithm_mkey & (SSL_kECDHE | SSL_kECDHEPSK)) != 0)
+ min_tls = SSL3_VERSION;
+
+ if ((min_tls > s->s3->tmp.max_ver) || (c->max_tls < s->s3->tmp.min_ver))
+ return 1;
+ }
if (SSL_IS_DTLS(s) && (DTLS_VERSION_GT(c->min_dtls, s->s3->tmp.max_ver)
|| DTLS_VERSION_LT(c->max_dtls, s->s3->tmp.min_ver)))
return 1;
return ssl_security(s, SSL_SECOP_TICKET, 0, 0, NULL);
}
-/* Initialise digests to default values */
-void ssl_set_default_md(SSL *s)
-{
- const EVP_MD **pmd = s->s3->tmp.md;
-#ifndef OPENSSL_NO_DSA
- pmd[SSL_PKEY_DSA_SIGN] = ssl_md(SSL_MD_SHA1_IDX);
-#endif
-#ifndef OPENSSL_NO_RSA
- if (SSL_USE_SIGALGS(s))
- pmd[SSL_PKEY_RSA_SIGN] = ssl_md(SSL_MD_SHA1_IDX);
- else
- pmd[SSL_PKEY_RSA_SIGN] = ssl_md(SSL_MD_MD5_SHA1_IDX);
- pmd[SSL_PKEY_RSA_ENC] = pmd[SSL_PKEY_RSA_SIGN];
-#endif
-#ifndef OPENSSL_NO_EC
- pmd[SSL_PKEY_ECC] = ssl_md(SSL_MD_SHA1_IDX);
-#endif
-#ifndef OPENSSL_NO_GOST
- pmd[SSL_PKEY_GOST01] = ssl_md(SSL_MD_GOST94_IDX);
- pmd[SSL_PKEY_GOST12_256] = ssl_md(SSL_MD_GOST12_256_IDX);
- pmd[SSL_PKEY_GOST12_512] = ssl_md(SSL_MD_GOST12_512_IDX);
-#endif
-}
-
int tls1_set_server_sigalgs(SSL *s)
{
- int al;
size_t i;
/* Clear any shared signature algorithms */
OPENSSL_free(s->cert->shared_sigalgs);
s->cert->shared_sigalgs = NULL;
s->cert->shared_sigalgslen = 0;
- /* Clear certificate digests and validity flags */
- for (i = 0; i < SSL_PKEY_NUM; i++) {
- s->s3->tmp.md[i] = NULL;
+ /* Clear certificate validity flags */
+ for (i = 0; i < SSL_PKEY_NUM; i++)
s->s3->tmp.valid_flags[i] = 0;
- }
+ /*
+ * If peer sent no signature algorithms check to see if we support
+ * the default algorithm for each certificate type
+ */
+ if (s->s3->tmp.peer_sigalgs == NULL) {
+ const uint16_t *sent_sigs;
+ size_t sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs);
- /* If sigalgs received process it. */
- if (s->s3->tmp.peer_sigalgs) {
- if (!tls1_process_sigalgs(s)) {
- SSLerr(SSL_F_TLS1_SET_SERVER_SIGALGS, ERR_R_MALLOC_FAILURE);
- al = SSL_AD_INTERNAL_ERROR;
- goto err;
- }
- /* Fatal error is no shared signature algorithms */
- if (!s->cert->shared_sigalgs) {
- SSLerr(SSL_F_TLS1_SET_SERVER_SIGALGS,
- SSL_R_NO_SHARED_SIGNATURE_ALGORITHMS);
- al = SSL_AD_ILLEGAL_PARAMETER;
- goto err;
+ for (i = 0; i < SSL_PKEY_NUM; i++) {
+ const SIGALG_LOOKUP *lu = tls1_get_legacy_sigalg(s, i);
+ size_t j;
+
+ if (lu == NULL)
+ continue;
+ /* Check default matches a type we sent */
+ for (j = 0; j < sent_sigslen; j++) {
+ if (lu->sigalg == sent_sigs[j]) {
+ s->s3->tmp.valid_flags[i] = CERT_PKEY_SIGN;
+ break;
+ }
+ }
}
- } else {
- ssl_set_default_md(s);
+ return 1;
}
- return 1;
- err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
+
+ if (!tls1_process_sigalgs(s)) {
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+ SSL_F_TLS1_SET_SERVER_SIGALGS, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ if (s->cert->shared_sigalgs != NULL)
+ return 1;
+
+ /* Fatal error if no shared signature algorithms */
+ SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS1_SET_SERVER_SIGALGS,
+ SSL_R_NO_SHARED_SIGNATURE_ALGORITHMS);
return 0;
}
* sesslen: the length of the session ID.
* psess: (output) on return, if a ticket was decrypted, then this is set to
* point to the resulting session.
- *
- * Returns:
- * TICKET_FATAL_ERR_MALLOC: fatal error, malloc failure.
- * TICKET_FATAL_ERR_OTHER: fatal error, either from parsing or decrypting the
- * ticket.
- * TICKET_NO_DECRYPT: the ticket couldn't be decrypted.
- * TICKET_SUCCESS: a ticket was successfully decrypted and *psess was
- * set.
- * TICKET_SUCCESS_RENEW: same as 3, but the ticket needs to be renewed
*/
TICKET_RETURN tls_decrypt_ticket(SSL *s, const unsigned char *etick,
size_t eticklen, const unsigned char *sess_id,
unsigned char tick_hmac[EVP_MAX_MD_SIZE];
HMAC_CTX *hctx = NULL;
EVP_CIPHER_CTX *ctx;
- SSL_CTX *tctx = s->initial_ctx;
+ SSL_CTX *tctx = s->session_ctx;
/* Initialize session ticket encryption and HMAC contexts */
hctx = HMAC_CTX_new();
}
/* Attempt to decrypt session data */
/* Move p after IV to start of encrypted ticket, update length */
- p = etick + 16 + EVP_CIPHER_CTX_iv_length(ctx);
- eticklen -= 16 + EVP_CIPHER_CTX_iv_length(ctx);
+ p = etick + TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_iv_length(ctx);
+ eticklen -= TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_iv_length(ctx);
sdec = OPENSSL_malloc(eticklen);
if (sdec == NULL || EVP_DecryptUpdate(ctx, sdec, &slen, p,
(int)eticklen) <= 0) {
p = sdec;
sess = d2i_SSL_SESSION(NULL, &p, slen);
+ slen -= p - sdec;
OPENSSL_free(sdec);
if (sess) {
+ /* Some additional consistency checks */
+ if (slen != 0 || sess->session_id_length != 0) {
+ SSL_SESSION_free(sess);
+ return TICKET_NO_DECRYPT;
+ }
/*
* The session ID, if non-empty, is used by some clients to detect
* that the ticket has been accepted. So we copy it to the session
return ret;
}
-int tls12_get_sigandhash(SSL *s, WPACKET *pkt, const EVP_PKEY *pk,
- const EVP_MD *md, int *ispss)
-{
- int md_id, sig_id, tmpispss = 0;
- size_t i;
- const SIGALG_LOOKUP *curr;
-
- if (md == NULL)
- return 0;
- md_id = EVP_MD_type(md);
- sig_id = EVP_PKEY_id(pk);
- if (md_id == NID_undef)
- return 0;
-
- for (i = 0, curr = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl);
- i++, curr++) {
- if (curr->hash == md_id && curr->sig == sig_id) {
- if (sig_id == EVP_PKEY_RSA) {
- tmpispss = SIGID_IS_PSS(curr->sigalg);
- if (!SSL_IS_TLS13(s) && tmpispss) {
- size_t j;
-
- /*
- * Check peer actually sent a PSS sig id - it could have
- * been a PKCS1 sig id instead.
- */
- for (j = 0; j < s->cert->shared_sigalgslen; j++)
- if (s->cert->shared_sigalgs[j].rsigalg == curr->sigalg)
- break;
-
- if (j == s->cert->shared_sigalgslen)
- continue;
- }
- }
- if (!WPACKET_put_bytes_u16(pkt, curr->sigalg))
- return 0;
- *ispss = tmpispss;
- return 1;
- }
- }
-
- return 0;
-}
-
-typedef struct {
- int nid;
- int secbits;
- int md_idx;
-} tls12_hash_info;
-
-static const tls12_hash_info tls12_md_info[] = {
- {NID_md5, 64, SSL_MD_MD5_IDX},
- {NID_sha1, 80, SSL_MD_SHA1_IDX},
- {NID_sha224, 112, SSL_MD_SHA224_IDX},
- {NID_sha256, 128, SSL_MD_SHA256_IDX},
- {NID_sha384, 192, SSL_MD_SHA384_IDX},
- {NID_sha512, 256, SSL_MD_SHA512_IDX},
- {NID_id_GostR3411_94, 128, SSL_MD_GOST94_IDX},
- {NID_id_GostR3411_2012_256, 128, SSL_MD_GOST12_256_IDX},
- {NID_id_GostR3411_2012_512, 256, SSL_MD_GOST12_512_IDX},
-};
-
-static const tls12_hash_info *tls12_get_hash_info(int hash_nid)
-{
- unsigned int i;
- if (hash_nid == NID_undef)
- return NULL;
-
- for (i = 0; i < OSSL_NELEM(tls12_md_info); i++) {
- if (tls12_md_info[i].nid == hash_nid)
- return tls12_md_info + i;
- }
-
- return NULL;
-}
-
-const EVP_MD *tls12_get_hash(int hash_nid)
-{
- const tls12_hash_info *inf;
- if (hash_nid == NID_md5 && FIPS_mode())
- return NULL;
- inf = tls12_get_hash_info(hash_nid);
- if (!inf)
- return NULL;
- return ssl_md(inf->md_idx);
-}
-
-static int tls12_get_pkey_idx(int sig_nid)
-{
- switch (sig_nid) {
-#ifndef OPENSSL_NO_RSA
- case EVP_PKEY_RSA:
- return SSL_PKEY_RSA_SIGN;
-#endif
-#ifndef OPENSSL_NO_DSA
- case EVP_PKEY_DSA:
- return SSL_PKEY_DSA_SIGN;
-#endif
-#ifndef OPENSSL_NO_EC
- case EVP_PKEY_EC:
- return SSL_PKEY_ECC;
-#endif
-#ifndef OPENSSL_NO_GOST
- case NID_id_GostR3410_2001:
- return SSL_PKEY_GOST01;
-
- case NID_id_GostR3410_2012_256:
- return SSL_PKEY_GOST12_256;
-
- case NID_id_GostR3410_2012_512:
- return SSL_PKEY_GOST12_512;
-#endif
- }
- return -1;
-}
-
-/* Convert TLS 1.2 signature algorithm extension values into NIDs */
-static void tls1_lookup_sigalg(int *phash_nid, int *psign_nid,
- int *psignhash_nid, unsigned int data)
-{
- int sign_nid = NID_undef, hash_nid = NID_undef;
- if (!phash_nid && !psign_nid && !psignhash_nid)
- return;
- if (phash_nid || psignhash_nid) {
- hash_nid = tls_sigalg_get_hash(data);
- if (phash_nid)
- *phash_nid = hash_nid;
- }
- if (psign_nid || psignhash_nid) {
- sign_nid = tls_sigalg_get_sig(data);
- if (psign_nid)
- *psign_nid = sign_nid;
- }
- if (psignhash_nid) {
- if (sign_nid == NID_undef || hash_nid == NID_undef
- || OBJ_find_sigid_by_algs(psignhash_nid, hash_nid, sign_nid) <= 0)
- *psignhash_nid = NID_undef;
- }
-}
-
/* Check to see if a signature algorithm is allowed */
-static int tls12_sigalg_allowed(SSL *s, int op, unsigned int ptmp)
+static int tls12_sigalg_allowed(SSL *s, int op, const SIGALG_LOOKUP *lu)
{
- /* See if we have an entry in the hash table and it is enabled */
- const tls12_hash_info *hinf
- = tls12_get_hash_info(tls_sigalg_get_hash(ptmp));
unsigned char sigalgstr[2];
+ int secbits;
- if (hinf == NULL || ssl_md(hinf->md_idx) == NULL)
+ /* See if sigalgs is recognised and if hash is enabled */
+ if (!tls1_lookup_md(lu, NULL))
+ return 0;
+ /* DSA is not allowed in TLS 1.3 */
+ if (SSL_IS_TLS13(s) && lu->sig == EVP_PKEY_DSA)
+ return 0;
+ /* TODO(OpenSSL1.2) fully axe DSA/etc. in ClientHello per TLS 1.3 spec */
+ if (!s->server && !SSL_IS_DTLS(s) && s->s3->tmp.min_ver >= TLS1_3_VERSION
+ && (lu->sig == EVP_PKEY_DSA || lu->hash_idx == SSL_MD_SHA1_IDX
+ || lu->hash_idx == SSL_MD_MD5_IDX
+ || lu->hash_idx == SSL_MD_SHA224_IDX))
return 0;
/* See if public key algorithm allowed */
- if (tls12_get_pkey_idx(tls_sigalg_get_sig(ptmp)) == -1)
+ if (ssl_cert_is_disabled(lu->sig_idx))
return 0;
+ if (lu->hash == NID_undef)
+ return 1;
+ /* Security bits: half digest bits */
+ secbits = EVP_MD_size(ssl_md(lu->hash_idx)) * 4;
/* Finally see if security callback allows it */
- sigalgstr[0] = (ptmp >> 8) & 0xff;
- sigalgstr[1] = ptmp & 0xff;
- return ssl_security(s, op, hinf->secbits, hinf->nid, (void *)sigalgstr);
+ sigalgstr[0] = (lu->sigalg >> 8) & 0xff;
+ sigalgstr[1] = lu->sigalg & 0xff;
+ return ssl_security(s, op, secbits, lu->hash, (void *)sigalgstr);
}
/*
void ssl_set_sig_mask(uint32_t *pmask_a, SSL *s, int op)
{
- const unsigned int *sigalgs;
+ const uint16_t *sigalgs;
size_t i, sigalgslen;
- int have_rsa = 0, have_dsa = 0, have_ecdsa = 0;
+ uint32_t disabled_mask = SSL_aRSA | SSL_aDSS | SSL_aECDSA;
/*
- * Now go through all signature algorithms seeing if we support any for
- * RSA, DSA, ECDSA. Do this for all versions not just TLS 1.2. To keep
- * down calls to security callback only check if we have to.
+ * Go through all signature algorithms seeing if we support any
+ * in disabled_mask.
*/
sigalgslen = tls12_get_psigalgs(s, 1, &sigalgs);
- for (i = 0; i < sigalgslen; i ++, sigalgs++) {
- switch (tls_sigalg_get_sig(*sigalgs)) {
-#ifndef OPENSSL_NO_RSA
- case EVP_PKEY_RSA:
- if (!have_rsa && tls12_sigalg_allowed(s, op, *sigalgs))
- have_rsa = 1;
- break;
-#endif
-#ifndef OPENSSL_NO_DSA
- case EVP_PKEY_DSA:
- if (!have_dsa && tls12_sigalg_allowed(s, op, *sigalgs))
- have_dsa = 1;
- break;
-#endif
-#ifndef OPENSSL_NO_EC
- case EVP_PKEY_EC:
- if (!have_ecdsa && tls12_sigalg_allowed(s, op, *sigalgs))
- have_ecdsa = 1;
- break;
-#endif
- }
+ for (i = 0; i < sigalgslen; i++, sigalgs++) {
+ const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(*sigalgs);
+ const SSL_CERT_LOOKUP *clu;
+
+ if (lu == NULL)
+ continue;
+
+ clu = ssl_cert_lookup_by_idx(lu->sig_idx);
+ if (clu == NULL)
+ continue;
+
+ /* If algorithm is disabled see if we can enable it */
+ if ((clu->amask & disabled_mask) != 0
+ && tls12_sigalg_allowed(s, op, lu))
+ disabled_mask &= ~clu->amask;
}
- if (!have_rsa)
- *pmask_a |= SSL_aRSA;
- if (!have_dsa)
- *pmask_a |= SSL_aDSS;
- if (!have_ecdsa)
- *pmask_a |= SSL_aECDSA;
+ *pmask_a |= disabled_mask;
}
int tls12_copy_sigalgs(SSL *s, WPACKET *pkt,
- const unsigned int *psig, size_t psiglen)
+ const uint16_t *psig, size_t psiglen)
{
size_t i;
+ int rv = 0;
for (i = 0; i < psiglen; i++, psig++) {
- if (tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, *psig)) {
- if (!WPACKET_put_bytes_u16(pkt, *psig))
- return 0;
- }
- }
- return 1;
+ const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(*psig);
+
+ if (!tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, lu))
+ continue;
+ if (!WPACKET_put_bytes_u16(pkt, *psig))
+ return 0;
+ /*
+ * If TLS 1.3 must have at least one valid TLS 1.3 message
+ * signing algorithm: i.e. neither RSA nor SHA1/SHA224
+ */
+ if (rv == 0 && (!SSL_IS_TLS13(s)
+ || (lu->sig != EVP_PKEY_RSA
+ && lu->hash != NID_sha1
+ && lu->hash != NID_sha224)))
+ rv = 1;
+ }
+ if (rv == 0)
+ SSLerr(SSL_F_TLS12_COPY_SIGALGS, SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
+ return rv;
}
/* Given preference and allowed sigalgs set shared sigalgs */
-static size_t tls12_shared_sigalgs(SSL *s, TLS_SIGALGS *shsig,
- const unsigned int *pref, size_t preflen,
- const unsigned int *allow, size_t allowlen)
+static size_t tls12_shared_sigalgs(SSL *s, const SIGALG_LOOKUP **shsig,
+ const uint16_t *pref, size_t preflen,
+ const uint16_t *allow, size_t allowlen)
{
- const unsigned int *ptmp, *atmp;
+ const uint16_t *ptmp, *atmp;
size_t i, j, nmatch = 0;
for (i = 0, ptmp = pref; i < preflen; i++, ptmp++) {
+ const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(*ptmp);
+
/* Skip disabled hashes or signature algorithms */
- if (!tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SHARED, *ptmp))
+ if (!tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SHARED, lu))
continue;
for (j = 0, atmp = allow; j < allowlen; j++, atmp++) {
if (*ptmp == *atmp) {
nmatch++;
- if (shsig) {
- shsig->rsigalg = *ptmp;
- tls1_lookup_sigalg(&shsig->hash_nid,
- &shsig->sign_nid,
- &shsig->signandhash_nid, *ptmp);
- shsig++;
- }
+ if (shsig)
+ *shsig++ = lu;
break;
}
}
/* Set shared signature algorithms for SSL structures */
static int tls1_set_shared_sigalgs(SSL *s)
{
- const unsigned int *pref, *allow, *conf;
+ const uint16_t *pref, *allow, *conf;
size_t preflen, allowlen, conflen;
size_t nmatch;
- TLS_SIGALGS *salgs = NULL;
+ const SIGALG_LOOKUP **salgs = NULL;
CERT *c = s->cert;
unsigned int is_suiteb = tls1_suiteb(s);
}
nmatch = tls12_shared_sigalgs(s, NULL, pref, preflen, allow, allowlen);
if (nmatch) {
- salgs = OPENSSL_malloc(nmatch * sizeof(TLS_SIGALGS));
+ salgs = OPENSSL_malloc(nmatch * sizeof(*salgs));
if (salgs == NULL)
return 0;
nmatch = tls12_shared_sigalgs(s, salgs, pref, preflen, allow, allowlen);
return 1;
}
-/* Set preferred digest for each key type */
-
-int tls1_save_sigalgs(SSL *s, PACKET *pkt)
+int tls1_save_u16(PACKET *pkt, uint16_t **pdest, size_t *pdestlen)
{
- CERT *c = s->cert;
+ unsigned int stmp;
size_t size, i;
-
- /* Extension ignored for inappropriate versions */
- if (!SSL_USE_SIGALGS(s))
- return 1;
- /* Should never happen */
- if (!c)
- return 0;
+ uint16_t *buf;
size = PACKET_remaining(pkt);
/* Invalid data length */
- if ((size & 1) != 0)
+ if (size == 0 || (size & 1) != 0)
return 0;
size >>= 1;
- OPENSSL_free(s->s3->tmp.peer_sigalgs);
- s->s3->tmp.peer_sigalgs = OPENSSL_malloc(size
- * sizeof(*s->s3->tmp.peer_sigalgs));
- if (s->s3->tmp.peer_sigalgs == NULL)
+ buf = OPENSSL_malloc(size * sizeof(*buf));
+ if (buf == NULL)
return 0;
- s->s3->tmp.peer_sigalgslen = size;
- for (i = 0; i < size && PACKET_get_net_2(pkt, &s->s3->tmp.peer_sigalgs[i]);
- i++)
- continue;
+ for (i = 0; i < size && PACKET_get_net_2(pkt, &stmp); i++)
+ buf[i] = stmp;
- if (i != size)
+ if (i != size) {
+ OPENSSL_free(buf);
return 0;
+ }
+
+ OPENSSL_free(*pdest);
+ *pdest = buf;
+ *pdestlen = size;
return 1;
}
+int tls1_save_sigalgs(SSL *s, PACKET *pkt)
+{
+ /* Extension ignored for inappropriate versions */
+ if (!SSL_USE_SIGALGS(s))
+ return 1;
+ /* Should never happen */
+ if (s->cert == NULL)
+ return 0;
+
+ return tls1_save_u16(pkt, &s->s3->tmp.peer_sigalgs,
+ &s->s3->tmp.peer_sigalgslen);
+
+ return 1;
+}
+
+/* Set preferred digest for each key type */
+
int tls1_process_sigalgs(SSL *s)
{
- int idx;
size_t i;
- const EVP_MD *md;
- const EVP_MD **pmd = s->s3->tmp.md;
uint32_t *pvalid = s->s3->tmp.valid_flags;
CERT *c = s->cert;
- TLS_SIGALGS *sigptr;
+
if (!tls1_set_shared_sigalgs(s))
return 0;
- for (i = 0, sigptr = c->shared_sigalgs;
- i < c->shared_sigalgslen; i++, sigptr++) {
+ for (i = 0; i < SSL_PKEY_NUM; i++)
+ pvalid[i] = 0;
+
+ for (i = 0; i < c->shared_sigalgslen; i++) {
+ const SIGALG_LOOKUP *sigptr = c->shared_sigalgs[i];
+ int idx = sigptr->sig_idx;
+
/* Ignore PKCS1 based sig algs in TLSv1.3 */
- if (SSL_IS_TLS13(s)
- && (sigptr->rsigalg == TLSEXT_SIGALG_rsa_pkcs1_sha1
- || sigptr->rsigalg == TLSEXT_SIGALG_rsa_pkcs1_sha256
- || sigptr->rsigalg == TLSEXT_SIGALG_rsa_pkcs1_sha384
- || sigptr->rsigalg == TLSEXT_SIGALG_rsa_pkcs1_sha512))
+ if (SSL_IS_TLS13(s) && sigptr->sig == EVP_PKEY_RSA)
continue;
- idx = tls12_get_pkey_idx(sigptr->sign_nid);
- if (idx > 0 && pmd[idx] == NULL) {
- md = tls12_get_hash(sigptr->hash_nid);
- pmd[idx] = md;
- pvalid[idx] = CERT_PKEY_EXPLICIT_SIGN;
- if (idx == SSL_PKEY_RSA_SIGN) {
- pvalid[SSL_PKEY_RSA_ENC] = CERT_PKEY_EXPLICIT_SIGN;
- pmd[SSL_PKEY_RSA_ENC] = md;
- }
- }
-
- }
- /*
- * In strict mode or TLS1.3 leave unset digests as NULL to indicate we can't
- * use the certificate for signing.
- */
- if (!(s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT)
- && !SSL_IS_TLS13(s)) {
- /*
- * Set any remaining keys to default values. NOTE: if alg is not
- * supported it stays as NULL.
- */
-#ifndef OPENSSL_NO_DSA
- if (pmd[SSL_PKEY_DSA_SIGN] == NULL)
- pmd[SSL_PKEY_DSA_SIGN] = EVP_sha1();
-#endif
-#ifndef OPENSSL_NO_RSA
- if (pmd[SSL_PKEY_RSA_SIGN] == NULL) {
- pmd[SSL_PKEY_RSA_SIGN] = EVP_sha1();
- pmd[SSL_PKEY_RSA_ENC] = EVP_sha1();
- }
-#endif
-#ifndef OPENSSL_NO_EC
- if (pmd[SSL_PKEY_ECC] == NULL)
- pmd[SSL_PKEY_ECC] = EVP_sha1();
-#endif
-#ifndef OPENSSL_NO_GOST
- if (pmd[SSL_PKEY_GOST01] == NULL)
- pmd[SSL_PKEY_GOST01] = EVP_get_digestbynid(NID_id_GostR3411_94);
- if (pmd[SSL_PKEY_GOST12_256] == NULL)
- pmd[SSL_PKEY_GOST12_256] =
- EVP_get_digestbynid(NID_id_GostR3411_2012_256);
- if (pmd[SSL_PKEY_GOST12_512] == NULL)
- pmd[SSL_PKEY_GOST12_512] =
- EVP_get_digestbynid(NID_id_GostR3411_2012_512);
-#endif
+ /* If not disabled indicate we can explicitly sign */
+ if (pvalid[idx] == 0 && !ssl_cert_is_disabled(idx))
+ pvalid[idx] = CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN;
}
return 1;
}
int *psign, int *phash, int *psignhash,
unsigned char *rsig, unsigned char *rhash)
{
- unsigned int *psig = s->s3->tmp.peer_sigalgs;
+ uint16_t *psig = s->s3->tmp.peer_sigalgs;
size_t numsigalgs = s->s3->tmp.peer_sigalgslen;
if (psig == NULL || numsigalgs > INT_MAX)
return 0;
if (idx >= 0) {
+ const SIGALG_LOOKUP *lu;
+
if (idx >= (int)numsigalgs)
return 0;
psig += idx;
- if (rhash)
+ if (rhash != NULL)
*rhash = (unsigned char)((*psig >> 8) & 0xff);
- if (rsig)
+ if (rsig != NULL)
*rsig = (unsigned char)(*psig & 0xff);
- tls1_lookup_sigalg(phash, psign, psignhash, *psig);
+ lu = tls1_lookup_sigalg(*psig);
+ if (psign != NULL)
+ *psign = lu != NULL ? lu->sig : NID_undef;
+ if (phash != NULL)
+ *phash = lu != NULL ? lu->hash : NID_undef;
+ if (psignhash != NULL)
+ *psignhash = lu != NULL ? lu->sigandhash : NID_undef;
}
return (int)numsigalgs;
}
int *psign, int *phash, int *psignhash,
unsigned char *rsig, unsigned char *rhash)
{
- TLS_SIGALGS *shsigalgs = s->cert->shared_sigalgs;
- if (!shsigalgs || idx >= (int)s->cert->shared_sigalgslen
- || s->cert->shared_sigalgslen > INT_MAX)
+ const SIGALG_LOOKUP *shsigalgs;
+ if (s->cert->shared_sigalgs == NULL
+ || idx < 0
+ || idx >= (int)s->cert->shared_sigalgslen
+ || s->cert->shared_sigalgslen > INT_MAX)
return 0;
- shsigalgs += idx;
- if (phash)
- *phash = shsigalgs->hash_nid;
- if (psign)
- *psign = shsigalgs->sign_nid;
- if (psignhash)
- *psignhash = shsigalgs->signandhash_nid;
- if (rsig)
- *rsig = (unsigned char)(shsigalgs->rsigalg & 0xff);
- if (rhash)
- *rhash = (unsigned char)((shsigalgs->rsigalg >> 8) & 0xff);
+ shsigalgs = s->cert->shared_sigalgs[idx];
+ if (phash != NULL)
+ *phash = shsigalgs->hash;
+ if (psign != NULL)
+ *psign = shsigalgs->sig;
+ if (psignhash != NULL)
+ *psignhash = shsigalgs->sigandhash;
+ if (rsig != NULL)
+ *rsig = (unsigned char)(shsigalgs->sigalg & 0xff);
+ if (rhash != NULL)
+ *rhash = (unsigned char)((shsigalgs->sigalg >> 8) & 0xff);
return (int)s->cert->shared_sigalgslen;
}
-#define MAX_SIGALGLEN (TLSEXT_hash_num * TLSEXT_signature_num * 2)
+/* Maximum possible number of unique entries in sigalgs array */
+#define TLS_MAX_SIGALGCNT (OSSL_NELEM(sigalg_lookup_tbl) * 2)
typedef struct {
size_t sigalgcnt;
- int sigalgs[MAX_SIGALGLEN];
+ int sigalgs[TLS_MAX_SIGALGCNT];
} sig_cb_st;
static void get_sigorhash(int *psig, int *phash, const char *str)
{
if (strcmp(str, "RSA") == 0) {
*psig = EVP_PKEY_RSA;
+ } else if (strcmp(str, "RSA-PSS") == 0 || strcmp(str, "PSS") == 0) {
+ *psig = EVP_PKEY_RSA_PSS;
} else if (strcmp(str, "DSA") == 0) {
*psig = EVP_PKEY_DSA;
} else if (strcmp(str, "ECDSA") == 0) {
*phash = OBJ_ln2nid(str);
}
}
+/* Maximum length of a signature algorithm string component */
+#define TLS_MAX_SIGSTRING_LEN 40
static int sig_cb(const char *elem, int len, void *arg)
{
sig_cb_st *sarg = arg;
size_t i;
- char etmp[20], *p;
+ char etmp[TLS_MAX_SIGSTRING_LEN], *p;
int sig_alg = NID_undef, hash_alg = NID_undef;
if (elem == NULL)
return 0;
- if (sarg->sigalgcnt == MAX_SIGALGLEN)
+ if (sarg->sigalgcnt == TLS_MAX_SIGALGCNT)
return 0;
if (len > (int)(sizeof(etmp) - 1))
return 0;
memcpy(etmp, elem, len);
etmp[len] = 0;
p = strchr(etmp, '+');
- if (!p)
- return 0;
- *p = 0;
- p++;
- if (!*p)
- return 0;
-
- get_sigorhash(&sig_alg, &hash_alg, etmp);
- get_sigorhash(&sig_alg, &hash_alg, p);
+ /* See if we have a match for TLS 1.3 names */
+ if (p == NULL) {
+ const SIGALG_LOOKUP *s;
+
+ for (i = 0, s = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl);
+ i++, s++) {
+ if (s->name != NULL && strcmp(etmp, s->name) == 0) {
+ sig_alg = s->sig;
+ hash_alg = s->hash;
+ break;
+ }
+ }
+ } else {
+ *p = 0;
+ p++;
+ if (*p == 0)
+ return 0;
+ get_sigorhash(&sig_alg, &hash_alg, etmp);
+ get_sigorhash(&sig_alg, &hash_alg, p);
+ }
- if (sig_alg == NID_undef || hash_alg == NID_undef)
+ if (sig_alg == NID_undef || (p != NULL && hash_alg == NID_undef))
return 0;
for (i = 0; i < sarg->sigalgcnt; i += 2) {
return tls1_set_sigalgs(c, sig.sigalgs, sig.sigalgcnt, client);
}
-/* TODO(TLS1.3): Needs updating to allow setting of TLS1.3 sig algs */
int tls1_set_sigalgs(CERT *c, const int *psig_nids, size_t salglen, int client)
{
- unsigned int *sigalgs, *sptr;
+ uint16_t *sigalgs, *sptr;
size_t i;
if (salglen & 1)
sigalgs = OPENSSL_malloc((salglen / 2) * sizeof(*sigalgs));
if (sigalgs == NULL)
return 0;
- /*
- * TODO(TLS1.3): Somehow we need to be able to set RSA-PSS as well as
- * RSA-PKCS1. For now we only allow setting of RSA-PKCS1
- */
for (i = 0, sptr = sigalgs; i < salglen; i += 2) {
size_t j;
const SIGALG_LOOKUP *curr;
for (j = 0, curr = sigalg_lookup_tbl; j < OSSL_NELEM(sigalg_lookup_tbl);
j++, curr++) {
- /* Skip setting PSS so we get PKCS1 by default */
- if (SIGID_IS_PSS(curr->sigalg))
- continue;
if (curr->hash == md_id && curr->sig == sig_id) {
*sptr++ = curr->sigalg;
break;
if (default_nid)
return sig_nid == default_nid ? 1 : 0;
for (i = 0; i < c->shared_sigalgslen; i++)
- if (sig_nid == c->shared_sigalgs[i].signandhash_nid)
+ if (sig_nid == c->shared_sigalgs[i]->sigandhash)
return 1;
return 0;
}
* attempting to use them.
*/
-/* Flags which need to be set for a certificate when stict mode not set */
+/* Flags which need to be set for a certificate when strict mode not set */
#define CERT_PKEY_VALID_FLAGS \
(CERT_PKEY_EE_SIGNATURE|CERT_PKEY_EE_PARAM)
if (!x || !pk)
goto end;
} else {
+ size_t certidx;
+
if (!x || !pk)
return 0;
- idx = ssl_cert_type(x, pk);
- if (idx == -1)
+
+ if (ssl_cert_lookup_by_pkey(pk, &certidx) == NULL)
return 0;
+ idx = certidx;
pvalid = s->s3->tmp.valid_flags + idx;
if (c->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT)
/* If no sigalgs extension use defaults from RFC5246 */
else {
switch (idx) {
- case SSL_PKEY_RSA_ENC:
- case SSL_PKEY_RSA_SIGN:
+ case SSL_PKEY_RSA:
rsign = EVP_PKEY_RSA;
default_nid = NID_sha1WithRSAEncryption;
break;
*/
if (default_nid > 0 && c->conf_sigalgs) {
size_t j;
- const unsigned int *p = c->conf_sigalgs;
+ const uint16_t *p = c->conf_sigalgs;
for (j = 0; j < c->conf_sigalgslen; j++, p++) {
- if (tls_sigalg_get_hash(*p) == NID_sha1
- && tls_sigalg_get_sig(*p) == rsign)
+ const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(*p);
+
+ if (lu != NULL && lu->hash == NID_sha1 && lu->sig == rsign)
break;
}
if (j == c->conf_sigalgslen) {
rv |= CERT_PKEY_EE_SIGNATURE | CERT_PKEY_CA_SIGNATURE;
skip_sigs:
/* Check cert parameters are consistent */
- if (tls1_check_cert_param(s, x, check_flags ? 1 : 2))
+ if (tls1_check_cert_param(s, x, 1))
rv |= CERT_PKEY_EE_PARAM;
else if (!check_flags)
goto end;
break;
}
if (check_type) {
- const unsigned char *ctypes;
- int ctypelen;
- if (c->ctypes) {
- ctypes = c->ctypes;
- ctypelen = (int)c->ctype_num;
- } else {
- ctypes = (unsigned char *)s->s3->tmp.ctype;
- ctypelen = s->s3->tmp.ctype_num;
- }
- for (i = 0; i < ctypelen; i++) {
- if (ctypes[i] == check_type) {
+ const uint8_t *ctypes = s->s3->tmp.ctype;
+ size_t j;
+
+ for (j = 0; j < s->s3->tmp.ctype_len; j++, ctypes++) {
+ if (*ctypes == check_type) {
rv |= CERT_PKEY_CERT_TYPE;
break;
}
}
if (!(rv & CERT_PKEY_CERT_TYPE) && !check_flags)
goto end;
- } else
+ } else {
rv |= CERT_PKEY_CERT_TYPE;
+ }
- ca_dn = s->s3->tmp.ca_names;
+ ca_dn = s->s3->tmp.peer_ca_names;
if (!sk_X509_NAME_num(ca_dn))
rv |= CERT_PKEY_ISSUER_NAME;
end:
- if (TLS1_get_version(s) >= TLS1_2_VERSION) {
- if (*pvalid & CERT_PKEY_EXPLICIT_SIGN)
- rv |= CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN;
- else if (s->s3->tmp.md[idx] != NULL)
- rv |= CERT_PKEY_SIGN;
- } else
+ if (TLS1_get_version(s) >= TLS1_2_VERSION)
+ rv |= *pvalid & (CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN);
+ else
rv |= CERT_PKEY_SIGN | CERT_PKEY_EXPLICIT_SIGN;
/*
* chain is invalid.
*/
if (!check_flags) {
- if (rv & CERT_PKEY_VALID)
+ if (rv & CERT_PKEY_VALID) {
*pvalid = rv;
- else {
- /* Preserve explicit sign flag, clear rest */
- *pvalid &= CERT_PKEY_EXPLICIT_SIGN;
+ } else {
+ /* Preserve sign and explicit sign flag, clear rest */
+ *pvalid &= CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN;
return 0;
}
}
/* Set validity of certificates in an SSL structure */
void tls1_set_cert_validity(SSL *s)
{
- tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA_ENC);
- tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA_SIGN);
+ tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA);
+ tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA_PSS_SIGN);
tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_DSA_SIGN);
tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ECC);
tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST01);
tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST12_256);
tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST12_512);
+ tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ED25519);
}
-/* User level utiity function to check a chain is suitable */
+/* User level utility function to check a chain is suitable */
int SSL_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain)
{
return tls1_check_chain(s, x, pk, chain, -1);
else
dh_secbits = 80;
} else {
- CERT_PKEY *cpk = ssl_get_server_send_pkey(s);
- dh_secbits = EVP_PKEY_security_bits(cpk->privatekey);
+ if (s->s3->tmp.cert == NULL)
+ return NULL;
+ dh_secbits = EVP_PKEY_security_bits(s->s3->tmp.cert->privatekey);
}
if (dh_secbits >= 128) {
static int ssl_security_cert_sig(SSL *s, SSL_CTX *ctx, X509 *x, int op)
{
/* Lookup signature algorithm digest */
- int secbits = -1, md_nid = NID_undef, sig_nid;
+ int secbits, nid, pknid;
/* Don't check signature if self signed */
if ((X509_get_extension_flags(x) & EXFLAG_SS) != 0)
return 1;
- sig_nid = X509_get_signature_nid(x);
- if (sig_nid && OBJ_find_sigid_algs(sig_nid, &md_nid, NULL)) {
- const EVP_MD *md;
- if (md_nid && (md = EVP_get_digestbynid(md_nid)))
- secbits = EVP_MD_size(md) * 4;
- }
+ if (!X509_get_signature_info(x, &nid, &pknid, &secbits, NULL))
+ secbits = -1;
+ /* If digest NID not defined use signature NID */
+ if (nid == NID_undef)
+ nid = pknid;
if (s)
- return ssl_security(s, op, secbits, md_nid, x);
+ return ssl_security(s, op, secbits, nid, x);
else
- return ssl_ctx_security(ctx, op, secbits, md_nid, x);
+ return ssl_ctx_security(ctx, op, secbits, nid, x);
}
int ssl_security_cert(SSL *s, SSL_CTX *ctx, X509 *x, int vfy, int is_ee)
}
/*
- * Check security of a chain, if sk includes the end entity certificate then
- * x is NULL. If vfy is 1 then we are verifying a peer chain and not sending
+ * Check security of a chain, if |sk| includes the end entity certificate then
+ * |x| is NULL. If |vfy| is 1 then we are verifying a peer chain and not sending
* one to the peer. Return values: 1 if ok otherwise error code to use
*/
}
return 1;
}
+
+/*
+ * For TLS 1.2 servers check if we have a certificate which can be used
+ * with the signature algorithm "lu" and return index of certificate.
+ */
+
+static int tls12_get_cert_sigalg_idx(const SSL *s, const SIGALG_LOOKUP *lu)
+{
+ int sig_idx = lu->sig_idx;
+ const SSL_CERT_LOOKUP *clu = ssl_cert_lookup_by_idx(sig_idx);
+
+ /* If not recognised or not supported by cipher mask it is not suitable */
+ if (clu == NULL || !(clu->amask & s->s3->tmp.new_cipher->algorithm_auth))
+ return -1;
+
+ /* If PSS and we have no PSS cert use RSA */
+ if (sig_idx == SSL_PKEY_RSA_PSS_SIGN && !ssl_has_cert(s, sig_idx))
+ sig_idx = SSL_PKEY_RSA;
+
+ return s->s3->tmp.valid_flags[sig_idx] & CERT_PKEY_VALID ? sig_idx : -1;
+}
+
+/*
+ * Choose an appropriate signature algorithm based on available certificates
+ * Sets chosen certificate and signature algorithm.
+ *
+ * For servers if we fail to find a required certificate it is a fatal error,
+ * an appropriate error code is set and a TLS alert is sent.
+ *
+ * For clients fatalerrs is set to 0. If a certificate is not suitable it is not
+ * a fatal error: we will either try another certificate or not present one
+ * to the server. In this case no error is set.
+ */
+int tls_choose_sigalg(SSL *s, int fatalerrs)
+{
+ const SIGALG_LOOKUP *lu = NULL;
+ int sig_idx = -1;
+
+ s->s3->tmp.cert = NULL;
+ s->s3->tmp.sigalg = NULL;
+
+ if (SSL_IS_TLS13(s)) {
+ size_t i;
+#ifndef OPENSSL_NO_EC
+ int curve = -1, skip_ec = 0;
+#endif
+
+ /* Look for a certificate matching shared sigalgs */
+ for (i = 0; i < s->cert->shared_sigalgslen; i++) {
+ lu = s->cert->shared_sigalgs[i];
+
+ /* Skip SHA1, SHA224, DSA and RSA if not PSS */
+ if (lu->hash == NID_sha1
+ || lu->hash == NID_sha224
+ || lu->sig == EVP_PKEY_DSA
+ || lu->sig == EVP_PKEY_RSA)
+ continue;
+ if (!tls1_lookup_md(lu, NULL))
+ continue;
+ if (!ssl_has_cert(s, lu->sig_idx)) {
+ if (lu->sig_idx != SSL_PKEY_RSA_PSS_SIGN
+ || !ssl_has_cert(s, SSL_PKEY_RSA))
+ continue;
+ sig_idx = SSL_PKEY_RSA;
+ }
+ if (lu->sig == EVP_PKEY_EC) {
+#ifndef OPENSSL_NO_EC
+ if (curve == -1) {
+ EC_KEY *ec = EVP_PKEY_get0_EC_KEY(s->cert->pkeys[SSL_PKEY_ECC].privatekey);
+
+ curve = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec));
+ if (EC_KEY_get_conv_form(ec)
+ != POINT_CONVERSION_UNCOMPRESSED)
+ skip_ec = 1;
+ }
+ if (skip_ec || (lu->curve != NID_undef && curve != lu->curve))
+ continue;
+#else
+ continue;
+#endif
+ } else if (lu->sig == EVP_PKEY_RSA_PSS) {
+ /* validate that key is large enough for the signature algorithm */
+ const RSA *rsa = EVP_PKEY_get0_RSA(s->cert->pkeys[SSL_PKEY_RSA_PSS_SIGN].privatekey);
+
+ if (!rsa_pss_check_min_key_size(rsa, lu))
+ continue;
+ }
+ break;
+ }
+ if (i == s->cert->shared_sigalgslen) {
+ if (!fatalerrs)
+ return 1;
+ SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_CHOOSE_SIGALG,
+ SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
+ return 0;
+ }
+ } else {
+ /* If ciphersuite doesn't require a cert nothing to do */
+ if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aCERT))
+ return 1;
+ if (!s->server && !ssl_has_cert(s, s->cert->key - s->cert->pkeys))
+ return 1;
+
+ if (SSL_USE_SIGALGS(s)) {
+ if (s->s3->tmp.peer_sigalgs != NULL) {
+ size_t i;
+#ifndef OPENSSL_NO_EC
+ int curve;
+
+ /* For Suite B need to match signature algorithm to curve */
+ if (tls1_suiteb(s)) {
+ EC_KEY *ec = EVP_PKEY_get0_EC_KEY(s->cert->pkeys[SSL_PKEY_ECC].privatekey);
+ curve = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec));
+ } else {
+ curve = -1;
+ }
+#endif
+
+ /*
+ * Find highest preference signature algorithm matching
+ * cert type
+ */
+ for (i = 0; i < s->cert->shared_sigalgslen; i++) {
+ lu = s->cert->shared_sigalgs[i];
+
+ if (s->server) {
+ if ((sig_idx = tls12_get_cert_sigalg_idx(s, lu)) == -1)
+ continue;
+ } else {
+ int cc_idx = s->cert->key - s->cert->pkeys;
+
+ sig_idx = lu->sig_idx;
+ if (cc_idx != sig_idx) {
+ if (sig_idx != SSL_PKEY_RSA_PSS_SIGN
+ || cc_idx != SSL_PKEY_RSA)
+ continue;
+ sig_idx = SSL_PKEY_RSA;
+ }
+ }
+ if (lu->sig == EVP_PKEY_RSA_PSS) {
+ /* validate that key is large enough for the signature algorithm */
+ const RSA *rsa = EVP_PKEY_get0_RSA(s->cert->pkeys[SSL_PKEY_RSA_PSS_SIGN].privatekey);
+
+ if (!rsa_pss_check_min_key_size(rsa, lu))
+ continue;
+ }
+#ifndef OPENSSL_NO_EC
+ if (curve == -1 || lu->curve == curve)
+#endif
+ break;
+ }
+ if (i == s->cert->shared_sigalgslen) {
+ if (!fatalerrs)
+ return 1;
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CHOOSE_SIGALG,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ } else {
+ /*
+ * If we have no sigalg use defaults
+ */
+ const uint16_t *sent_sigs;
+ size_t sent_sigslen, i;
+
+ if ((lu = tls1_get_legacy_sigalg(s, -1)) == NULL) {
+ if (!fatalerrs)
+ return 1;
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CHOOSE_SIGALG,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ /* Check signature matches a type we sent */
+ sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs);
+ for (i = 0; i < sent_sigslen; i++, sent_sigs++) {
+ if (lu->sigalg == *sent_sigs)
+ break;
+ }
+ if (i == sent_sigslen) {
+ if (!fatalerrs)
+ return 1;
+ SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
+ SSL_F_TLS_CHOOSE_SIGALG,
+ SSL_R_WRONG_SIGNATURE_TYPE);
+ return 0;
+ }
+ }
+ } else {
+ if ((lu = tls1_get_legacy_sigalg(s, -1)) == NULL) {
+ if (!fatalerrs)
+ return 1;
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CHOOSE_SIGALG,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ }
+ }
+ if (sig_idx == -1)
+ sig_idx = lu->sig_idx;
+ s->s3->tmp.cert = &s->cert->pkeys[sig_idx];
+ s->cert->key = s->s3->tmp.cert;
+ s->s3->tmp.sigalg = lu;
+ return 1;
+}
+
+int SSL_CTX_set_tlsext_max_fragment_length(SSL_CTX *ctx, uint8_t mode)
+{
+ if (mode != TLSEXT_max_fragment_length_DISABLED
+ && !IS_MAX_FRAGMENT_LENGTH_EXT_VALID(mode)) {
+ SSLerr(SSL_F_SSL_CTX_SET_TLSEXT_MAX_FRAGMENT_LENGTH,
+ SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH);
+ return 0;
+ }
+
+ ctx->ext.max_fragment_len_mode = mode;
+ return 1;
+}
+
+int SSL_set_tlsext_max_fragment_length(SSL *ssl, uint8_t mode)
+{
+ if (mode != TLSEXT_max_fragment_length_DISABLED
+ && !IS_MAX_FRAGMENT_LENGTH_EXT_VALID(mode)) {
+ SSLerr(SSL_F_SSL_SET_TLSEXT_MAX_FRAGMENT_LENGTH,
+ SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH);
+ return 0;
+ }
+
+ ssl->ext.max_fragment_len_mode = mode;
+ return 1;
+}
+
+uint8_t SSL_SESSION_get_max_fragment_length(const SSL_SESSION *session)
+{
+ return session->ext.max_fragment_len_mode;
+}
projects / openssl.git / blobdiff