#include <openssl/ocsp.h>
#include "../ssl_locl.h"
+#include "internal/cryptlib.h"
#include "statem_locl.h"
EXT_RETURN tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt,
}
/*
- * Construct a psk_kex_modes extension. We only have two modes we know about
- * at this stage, so we send both.
+ * Construct a psk_kex_modes extension.
*/
EXT_RETURN tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt,
unsigned int context, X509 *x,
size_t chainidx, int *al)
{
#ifndef OPENSSL_NO_TLS1_3
- /*
- * TODO(TLS1.3): Do we want this list to be configurable? For now we always
- * just send both supported modes
- */
+ int nodhe = s->options & SSL_OP_ALLOW_NO_DHE_KEX;
+
if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk_kex_modes)
|| !WPACKET_start_sub_packet_u16(pkt)
|| !WPACKET_start_sub_packet_u8(pkt)
|| !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE_DHE)
- || !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE)
+ || (nodhe && !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE))
|| !WPACKET_close(pkt)
|| !WPACKET_close(pkt)) {
SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK_KEX_MODES, ERR_R_INTERNAL_ERROR);
return EXT_RETURN_FAIL;
}
- s->ext.psk_kex_mode = TLSEXT_KEX_MODE_FLAG_KE | TLSEXT_KEX_MODE_FLAG_KE_DHE;
+ s->ext.psk_kex_mode = TLSEXT_KEX_MODE_FLAG_KE_DHE;
+ if (nodhe)
+ s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE;
#endif
return EXT_RETURN_SENT;
X509 *x, size_t chainidx, int *al)
{
#ifndef OPENSSL_NO_TLS1_3
- uint32_t now, agesec, agems;
- size_t hashsize, binderoffset, msglen;
- unsigned char *binder = NULL, *msgstart = NULL;
- const EVP_MD *md;
+ uint32_t now, agesec, agems = 0;
+ size_t reshashsize = 0, pskhashsize = 0, binderoffset, msglen, idlen = 0;
+ unsigned char *resbinder = NULL, *pskbinder = NULL, *msgstart = NULL;
+ const unsigned char *id = 0;
+ const EVP_MD *handmd = NULL, *mdres = NULL, *mdpsk = NULL;
EXT_RETURN ret = EXT_RETURN_FAIL;
+ SSL_SESSION *psksess = NULL;
+ int dores = 0;
s->session->ext.tick_identity = TLSEXT_PSK_BAD_IDENTITY;
* so don't add this extension.
*/
if (s->session->ssl_version != TLS1_3_VERSION
- || s->session->ext.ticklen == 0)
+ || (s->session->ext.ticklen == 0 && s->psk_use_session_cb == NULL))
return EXT_RETURN_NOT_SENT;
- if (s->session->cipher == NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR);
+ if (s->hello_retry_request)
+ handmd = ssl_handshake_md(s);
+
+ if (s->psk_use_session_cb != NULL
+ && !s->psk_use_session_cb(s, handmd, &id, &idlen, &psksess)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, SSL_R_BAD_PSK);
goto err;
}
- md = ssl_md(s->session->cipher->algorithm2);
- if (md == NULL) {
- /* Don't recognize this cipher so we can't use the session. Ignore it */
- return EXT_RETURN_NOT_SENT;
- }
+ if (s->session->ext.ticklen != 0) {
+ /* Get the digest associated with the ciphersuite in the session */
+ if (s->session->cipher == NULL) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+ mdres = ssl_md(s->session->cipher->algorithm2);
+ if (mdres == NULL) {
+ /*
+ * Don't recognize this cipher so we can't use the session.
+ * Ignore it
+ */
+ goto dopsksess;
+ }
+
+ if (s->hello_retry_request && mdres != handmd) {
+ /*
+ * Selected ciphersuite hash does not match the hash for the session
+ * so we can't use it.
+ */
+ goto dopsksess;
+ }
- if (s->hello_retry_request && md != ssl_handshake_md(s)) {
/*
- * Selected ciphersuite hash does not match the hash for the session so
- * we can't use it.
+ * Technically the C standard just says time() returns a time_t and says
+ * nothing about the encoding of that type. In practice most
+ * implementations follow POSIX which holds it as an integral type in
+ * seconds since epoch. We've already made the assumption that we can do
+ * this in multiple places in the code, so portability shouldn't be an
+ * issue.
*/
- return EXT_RETURN_NOT_SENT;
- }
+ now = (uint32_t)time(NULL);
+ agesec = now - (uint32_t)s->session->time;
- /*
- * Technically the C standard just says time() returns a time_t and says
- * nothing about the encoding of that type. In practice most implementations
- * follow POSIX which holds it as an integral type in seconds since epoch.
- * We've already made the assumption that we can do this in multiple places
- * in the code, so portability shouldn't be an issue.
- */
- now = (uint32_t)time(NULL);
- agesec = now - (uint32_t)s->session->time;
+ if (s->session->ext.tick_lifetime_hint < agesec) {
+ /* Ticket is too old. Ignore it. */
+ goto dopsksess;
+ }
- if (s->session->ext.tick_lifetime_hint < agesec) {
- /* Ticket is too old. Ignore it. */
- return EXT_RETURN_NOT_SENT;
- }
+ /*
+ * Calculate age in ms. We're just doing it to nearest second. Should be
+ * good enough.
+ */
+ agems = agesec * (uint32_t)1000;
- /*
- * Calculate age in ms. We're just doing it to nearest second. Should be
- * good enough.
- */
- agems = agesec * (uint32_t)1000;
+ if (agesec != 0 && agems / (uint32_t)1000 != agesec) {
+ /*
+ * Overflow. Shouldn't happen unless this is a *really* old session.
+ * If so we just ignore it.
+ */
+ goto dopsksess;
+ }
- if (agesec != 0 && agems / (uint32_t)1000 != agesec) {
/*
- * Overflow. Shouldn't happen unless this is a *really* old session. If
- * so we just ignore it.
+ * Obfuscate the age. Overflow here is fine, this addition is supposed
+ * to be mod 2^32.
*/
- return EXT_RETURN_NOT_SENT;
+ agems += s->session->ext.tick_age_add;
+
+ reshashsize = EVP_MD_size(mdres);
+ dores = 1;
}
- /*
- * Obfuscate the age. Overflow here is fine, this addition is supposed to
- * be mod 2^32.
- */
- agems += s->session->ext.tick_age_add;
+ dopsksess:
+ if (!dores && psksess == NULL)
+ return EXT_RETURN_NOT_SENT;
+
+ if (psksess != NULL) {
+ mdpsk = ssl_md(psksess->cipher->algorithm2);
+ if (mdpsk == NULL) {
+ /*
+ * Don't recognize this cipher so we can't use the session.
+ * If this happens it's an application bug.
+ */
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, SSL_R_BAD_PSK);
+ goto err;
+ }
+
+ if (s->hello_retry_request && mdpsk != handmd) {
+ /*
+ * Selected ciphersuite hash does not match the hash for the PSK
+ * session. This is an application bug.
+ */
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, SSL_R_BAD_PSK);
+ goto err;
+ }
- hashsize = EVP_MD_size(md);
+ pskhashsize = EVP_MD_size(mdpsk);
+ }
/* Create the extension, but skip over the binder for now */
if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk)
|| !WPACKET_start_sub_packet_u16(pkt)
- || !WPACKET_start_sub_packet_u16(pkt)
- || !WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick,
- s->session->ext.ticklen)
- || !WPACKET_put_bytes_u32(pkt, agems)
- || !WPACKET_close(pkt)
+ || !WPACKET_start_sub_packet_u16(pkt)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+ if (dores) {
+ if (!WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick,
+ s->session->ext.ticklen)
+ || !WPACKET_put_bytes_u32(pkt, agems)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+ }
+
+ if (psksess != NULL) {
+ if (!WPACKET_sub_memcpy_u16(pkt, id, idlen)
+ || !WPACKET_put_bytes_u32(pkt, 0)) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+ }
+
+ if (!WPACKET_close(pkt)
|| !WPACKET_get_total_written(pkt, &binderoffset)
|| !WPACKET_start_sub_packet_u16(pkt)
- || !WPACKET_sub_allocate_bytes_u8(pkt, hashsize, &binder)
+ || (dores
+ && !WPACKET_sub_allocate_bytes_u8(pkt, reshashsize, &resbinder))
+ || (psksess != NULL
+ && !WPACKET_sub_allocate_bytes_u8(pkt, pskhashsize, &pskbinder))
|| !WPACKET_close(pkt)
|| !WPACKET_close(pkt)
|| !WPACKET_get_total_written(pkt, &msglen)
msgstart = WPACKET_get_curr(pkt) - msglen;
- if (tls_psk_do_binder(s, md, msgstart, binderoffset, NULL, binder,
- s->session, 1, 0) != 1) {
+ if (dores
+ && tls_psk_do_binder(s, mdres, msgstart, binderoffset, NULL,
+ resbinder, s->session, 1, 0) != 1) {
+ SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+ if (psksess != NULL
+ && tls_psk_do_binder(s, mdpsk, msgstart, binderoffset, NULL,
+ pskbinder, psksess, 1, 1) != 1) {
SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR);
goto err;
}
- s->session->ext.tick_identity = 0;
+ if (dores)
+ s->session->ext.tick_identity = 0;
+ SSL_SESSION_free(s->psksession);
+ s->psksession = psksess;
+ if (psksess != NULL)
+ s->psksession->ext.tick_identity = (dores ? 1 : 0);
+ psksess = NULL;
ret = EXT_RETURN_SENT;
err:
+ SSL_SESSION_free(psksess);
return ret;
#else
return 1;
return 0;
}
- if (s->session->ext.tick_identity != (int)identity) {
+ if (s->session->ext.tick_identity == (int)identity) {
+ s->hit = 1;
+ SSL_SESSION_free(s->psksession);
+ s->psksession = NULL;
+ return 1;
+ }
+
+ if (s->psksession == NULL
+ || s->psksession->ext.tick_identity != (int)identity) {
*al = SSL_AD_ILLEGAL_PARAMETER;
SSLerr(SSL_F_TLS_PARSE_STOC_PSK, SSL_R_BAD_PSK_IDENTITY);
return 0;
}
+ SSL_SESSION_free(s->session);
+ s->session = s->psksession;
+ s->psksession = NULL;
+ memcpy(s->early_secret, s->session->early_secret, EVP_MAX_MD_SIZE);
s->hit = 1;
#endif
projects / openssl.git / blobdiff