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-rw-r--r--ssl/d1_srvr.c488
1 files changed, 429 insertions, 59 deletions
diff --git a/ssl/d1_srvr.c b/ssl/d1_srvr.c
index 2efaa19..29421da 100644
--- a/ssl/d1_srvr.c
+++ b/ssl/d1_srvr.c
@@ -4,7 +4,7 @@
* (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
*/
/* ====================================================================
- * Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved.
+ * Copyright (c) 1999-2007 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@@ -121,14 +121,15 @@
#include <openssl/evp.h>
#include <openssl/x509.h>
#include <openssl/md5.h>
+#include <openssl/bn.h>
#ifndef OPENSSL_NO_DH
#include <openssl/dh.h>
#endif
-static SSL_METHOD *dtls1_get_server_method(int ver);
+static const SSL_METHOD *dtls1_get_server_method(int ver);
static int dtls1_send_hello_verify_request(SSL *s);
-static SSL_METHOD *dtls1_get_server_method(int ver)
+static const SSL_METHOD *dtls1_get_server_method(int ver)
{
if (ver == DTLS1_VERSION)
return(DTLSv1_server_method());
@@ -144,11 +145,16 @@ IMPLEMENT_dtls1_meth_func(DTLSv1_server_method,
int dtls1_accept(SSL *s)
{
BUF_MEM *buf;
- unsigned long l,Time=(unsigned long)time(NULL);
+ unsigned long Time=(unsigned long)time(NULL);
void (*cb)(const SSL *ssl,int type,int val)=NULL;
+ unsigned long alg_k;
int ret= -1;
int new_state,state,skip=0;
int listen;
+#ifndef OPENSSL_NO_SCTP
+ unsigned char sctpauthkey[64];
+ char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
+#endif
RAND_add(&Time,sizeof(Time),0);
ERR_clear_error();
@@ -166,6 +172,13 @@ int dtls1_accept(SSL *s)
if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
s->d1->listen = listen;
+#ifndef OPENSSL_NO_SCTP
+ /* Notify SCTP BIO socket to enter handshake
+ * mode and prevent stream identifier other
+ * than 0. Will be ignored if no SCTP is used.
+ */
+ BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE, s->in_handshake, NULL);
+#endif
if (s->cert == NULL)
{
@@ -173,6 +186,19 @@ int dtls1_accept(SSL *s)
return(-1);
}
+#ifndef OPENSSL_NO_HEARTBEATS
+ /* If we're awaiting a HeartbeatResponse, pretend we
+ * already got and don't await it anymore, because
+ * Heartbeats don't make sense during handshakes anyway.
+ */
+ if (s->tlsext_hb_pending)
+ {
+ dtls1_stop_timer(s);
+ s->tlsext_hb_pending = 0;
+ s->tlsext_hb_seq++;
+ }
+#endif
+
for (;;)
{
state=s->state;
@@ -180,7 +206,7 @@ int dtls1_accept(SSL *s)
switch (s->state)
{
case SSL_ST_RENEGOTIATE:
- s->new_session=1;
+ s->renegotiate=1;
/* s->state=SSL_ST_ACCEPT; */
case SSL_ST_BEFORE:
@@ -225,8 +251,12 @@ int dtls1_accept(SSL *s)
{
/* Ok, we now need to push on a buffering BIO so that
* the output is sent in a way that TCP likes :-)
+ * ...but not with SCTP :-)
*/
- if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
+#ifndef OPENSSL_NO_SCTP
+ if (!BIO_dgram_is_sctp(SSL_get_wbio(s)))
+#endif
+ if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
ssl3_init_finished_mac(s);
s->state=SSL3_ST_SR_CLNT_HELLO_A;
@@ -306,30 +336,80 @@ int dtls1_accept(SSL *s)
s->state=SSL3_ST_SW_FLUSH;
s->s3->tmp.next_state=SSL3_ST_SR_CLNT_HELLO_A;
- /* HelloVerifyRequests resets Finished MAC */
- if (s->client_version != DTLS1_BAD_VER)
+ /* HelloVerifyRequest resets Finished MAC */
+ if (s->version != DTLS1_BAD_VER)
ssl3_init_finished_mac(s);
break;
+#ifndef OPENSSL_NO_SCTP
+ case DTLS1_SCTP_ST_SR_READ_SOCK:
+
+ if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s)))
+ {
+ s->s3->in_read_app_data=2;
+ s->rwstate=SSL_READING;
+ BIO_clear_retry_flags(SSL_get_rbio(s));
+ BIO_set_retry_read(SSL_get_rbio(s));
+ ret = -1;
+ goto end;
+ }
+
+ s->state=SSL3_ST_SR_FINISHED_A;
+ break;
+
+ case DTLS1_SCTP_ST_SW_WRITE_SOCK:
+ ret = BIO_dgram_sctp_wait_for_dry(SSL_get_wbio(s));
+ if (ret < 0) goto end;
+
+ if (ret == 0)
+ {
+ if (s->d1->next_state != SSL_ST_OK)
+ {
+ s->s3->in_read_app_data=2;
+ s->rwstate=SSL_READING;
+ BIO_clear_retry_flags(SSL_get_rbio(s));
+ BIO_set_retry_read(SSL_get_rbio(s));
+ ret = -1;
+ goto end;
+ }
+ }
+
+ s->state=s->d1->next_state;
+ break;
+#endif
+
case SSL3_ST_SW_SRVR_HELLO_A:
case SSL3_ST_SW_SRVR_HELLO_B:
- s->new_session = 2;
+ s->renegotiate = 2;
dtls1_start_timer(s);
ret=dtls1_send_server_hello(s);
if (ret <= 0) goto end;
-#ifndef OPENSSL_NO_TLSEXT
if (s->hit)
{
+#ifndef OPENSSL_NO_SCTP
+ /* Add new shared key for SCTP-Auth,
+ * will be ignored if no SCTP used.
+ */
+ snprintf((char*) labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
+ DTLS1_SCTP_AUTH_LABEL);
+
+ SSL_export_keying_material(s, sctpauthkey,
+ sizeof(sctpauthkey), labelbuffer,
+ sizeof(labelbuffer), NULL, 0, 0);
+
+ BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
+ sizeof(sctpauthkey), sctpauthkey);
+#endif
+#ifndef OPENSSL_NO_TLSEXT
if (s->tlsext_ticket_expected)
s->state=SSL3_ST_SW_SESSION_TICKET_A;
else
s->state=SSL3_ST_SW_CHANGE_A;
- }
#else
- if (s->hit)
- s->state=SSL3_ST_SW_CHANGE_A;
+ s->state=SSL3_ST_SW_CHANGE_A;
#endif
+ }
else
s->state=SSL3_ST_SW_CERT_A;
s->init_num=0;
@@ -337,8 +417,9 @@ int dtls1_accept(SSL *s)
case SSL3_ST_SW_CERT_A:
case SSL3_ST_SW_CERT_B:
- /* Check if it is anon DH */
- if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
+ /* Check if it is anon DH or normal PSK */
+ if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
+ && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
{
dtls1_start_timer(s);
ret=dtls1_send_server_certificate(s);
@@ -366,13 +447,13 @@ int dtls1_accept(SSL *s)
case SSL3_ST_SW_KEY_EXCH_A:
case SSL3_ST_SW_KEY_EXCH_B:
- l=s->s3->tmp.new_cipher->algorithms;
+ alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
/* clear this, it may get reset by
* send_server_key_exchange */
if ((s->options & SSL_OP_EPHEMERAL_RSA)
#ifndef OPENSSL_NO_KRB5
- && !(l & SSL_KRB5)
+ && !(alg_k & SSL_kKRB5)
#endif /* OPENSSL_NO_KRB5 */
)
/* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key
@@ -383,11 +464,17 @@ int dtls1_accept(SSL *s)
else
s->s3->tmp.use_rsa_tmp=0;
- /* only send if a DH key exchange, fortezza or
+ /* only send if a DH key exchange or
* RSA but we have a sign only certificate */
if (s->s3->tmp.use_rsa_tmp
- || (l & (SSL_DH|SSL_kFZA))
- || ((l & SSL_kRSA)
+ /* PSK: send ServerKeyExchange if PSK identity
+ * hint if provided */
+#ifndef OPENSSL_NO_PSK
+ || ((alg_k & SSL_kPSK) && s->ctx->psk_identity_hint)
+#endif
+ || (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
+ || (alg_k & SSL_kEECDH)
+ || ((alg_k & SSL_kRSA)
&& (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
|| (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)
&& EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)
@@ -418,17 +505,27 @@ int dtls1_accept(SSL *s)
/* never request cert in anonymous ciphersuites
* (see section "Certificate request" in SSL 3 drafts
* and in RFC 2246): */
- ((s->s3->tmp.new_cipher->algorithms & SSL_aNULL) &&
+ ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
/* ... except when the application insists on verification
* (against the specs, but s3_clnt.c accepts this for SSL 3) */
!(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) ||
- /* never request cert in Kerberos ciphersuites */
- (s->s3->tmp.new_cipher->algorithms & SSL_aKRB5))
+ /* never request cert in Kerberos ciphersuites */
+ (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)
+ /* With normal PSK Certificates and
+ * Certificate Requests are omitted */
+ || (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
{
/* no cert request */
skip=1;
s->s3->tmp.cert_request=0;
s->state=SSL3_ST_SW_SRVR_DONE_A;
+#ifndef OPENSSL_NO_SCTP
+ if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
+ {
+ s->d1->next_state = SSL3_ST_SW_SRVR_DONE_A;
+ s->state = DTLS1_SCTP_ST_SW_WRITE_SOCK;
+ }
+#endif
}
else
{
@@ -438,9 +535,23 @@ int dtls1_accept(SSL *s)
if (ret <= 0) goto end;
#ifndef NETSCAPE_HANG_BUG
s->state=SSL3_ST_SW_SRVR_DONE_A;
+#ifndef OPENSSL_NO_SCTP
+ if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
+ {
+ s->d1->next_state = SSL3_ST_SW_SRVR_DONE_A;
+ s->state = DTLS1_SCTP_ST_SW_WRITE_SOCK;
+ }
+#endif
#else
s->state=SSL3_ST_SW_FLUSH;
s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
+#ifndef OPENSSL_NO_SCTP
+ if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
+ {
+ s->d1->next_state = s->s3->tmp.next_state;
+ s->s3->tmp.next_state=DTLS1_SCTP_ST_SW_WRITE_SOCK;
+ }
+#endif
#endif
s->init_num=0;
}
@@ -460,6 +571,13 @@ int dtls1_accept(SSL *s)
s->rwstate=SSL_WRITING;
if (BIO_flush(s->wbio) <= 0)
{
+ /* If the write error was fatal, stop trying */
+ if (!BIO_should_retry(s->wbio))
+ {
+ s->rwstate=SSL_NOTHING;
+ s->state=s->s3->tmp.next_state;
+ }
+
ret= -1;
goto end;
}
@@ -492,18 +610,48 @@ int dtls1_accept(SSL *s)
case SSL3_ST_SR_KEY_EXCH_B:
ret=ssl3_get_client_key_exchange(s);
if (ret <= 0) goto end;
+#ifndef OPENSSL_NO_SCTP
+ /* Add new shared key for SCTP-Auth,
+ * will be ignored if no SCTP used.
+ */
+ snprintf((char *) labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
+ DTLS1_SCTP_AUTH_LABEL);
+
+ SSL_export_keying_material(s, sctpauthkey,
+ sizeof(sctpauthkey), labelbuffer,
+ sizeof(labelbuffer), NULL, 0, 0);
+
+ BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
+ sizeof(sctpauthkey), sctpauthkey);
+#endif
+
s->state=SSL3_ST_SR_CERT_VRFY_A;
s->init_num=0;
- /* We need to get hashes here so if there is
- * a client cert, it can be verified */
- s->method->ssl3_enc->cert_verify_mac(s,
- &(s->s3->finish_dgst1),
- &(s->s3->tmp.cert_verify_md[0]));
- s->method->ssl3_enc->cert_verify_mac(s,
- &(s->s3->finish_dgst2),
- &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]));
+ if (ret == 2)
+ {
+ /* For the ECDH ciphersuites when
+ * the client sends its ECDH pub key in
+ * a certificate, the CertificateVerify
+ * message is not sent.
+ */
+ s->state=SSL3_ST_SR_FINISHED_A;
+ s->init_num = 0;
+ }
+ else
+ {
+ s->state=SSL3_ST_SR_CERT_VRFY_A;
+ s->init_num=0;
+ /* We need to get hashes here so if there is
+ * a client cert, it can be verified */
+ s->method->ssl3_enc->cert_verify_mac(s,
+ NID_md5,
+ &(s->s3->tmp.cert_verify_md[0]));
+ s->method->ssl3_enc->cert_verify_mac(s,
+ NID_sha1,
+ &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]));
+ }
break;
case SSL3_ST_SR_CERT_VRFY_A:
@@ -513,8 +661,13 @@ int dtls1_accept(SSL *s)
/* we should decide if we expected this one */
ret=ssl3_get_cert_verify(s);
if (ret <= 0) goto end;
-
- s->state=SSL3_ST_SR_FINISHED_A;
+#ifndef OPENSSL_NO_SCTP
+ if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
+ state == SSL_ST_RENEGOTIATE)
+ s->state=DTLS1_SCTP_ST_SR_READ_SOCK;
+ else
+#endif
+ s->state=SSL3_ST_SR_FINISHED_A;
s->init_num=0;
break;
@@ -566,6 +719,14 @@ int dtls1_accept(SSL *s)
SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
if (ret <= 0) goto end;
+
+#ifndef OPENSSL_NO_SCTP
+ /* Change to new shared key of SCTP-Auth,
+ * will be ignored if no SCTP used.
+ */
+ BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, 0, NULL);
+#endif
+
s->state=SSL3_ST_SW_FINISHED_A;
s->init_num=0;
@@ -590,7 +751,16 @@ int dtls1_accept(SSL *s)
if (s->hit)
s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
else
+ {
s->s3->tmp.next_state=SSL_ST_OK;
+#ifndef OPENSSL_NO_SCTP
+ if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
+ {
+ s->d1->next_state = s->s3->tmp.next_state;
+ s->s3->tmp.next_state=DTLS1_SCTP_ST_SW_WRITE_SOCK;
+ }
+#endif
+ }
s->init_num=0;
break;
@@ -608,11 +778,9 @@ int dtls1_accept(SSL *s)
s->init_num=0;
- if (s->new_session == 2) /* skipped if we just sent a HelloRequest */
+ if (s->renegotiate == 2) /* skipped if we just sent a HelloRequest */
{
- /* actually not necessarily a 'new' session unless
- * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */
-
+ s->renegotiate=0;
s->new_session=0;
ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
@@ -664,6 +832,14 @@ end:
/* BIO_flush(s->wbio); */
s->in_handshake--;
+#ifndef OPENSSL_NO_SCTP
+ /* Notify SCTP BIO socket to leave handshake
+ * mode and prevent stream identifier other
+ * than 0. Will be ignored if no SCTP is used.
+ */
+ BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE, s->in_handshake, NULL);
+#endif
+
if (cb != NULL)
cb(s,SSL_CB_ACCEPT_EXIT,ret);
return(ret);
@@ -701,12 +877,8 @@ int dtls1_send_hello_verify_request(SSL *s)
buf = (unsigned char *)s->init_buf->data;
msg = p = &(buf[DTLS1_HM_HEADER_LENGTH]);
- if (s->client_version == DTLS1_BAD_VER)
- *(p++) = DTLS1_BAD_VER>>8,
- *(p++) = DTLS1_BAD_VER&0xff;
- else
- *(p++) = s->version >> 8,
- *(p++) = s->version & 0xFF;
+ *(p++) = s->version >> 8;
+ *(p++) = s->version & 0xFF;
if (s->ctx->app_gen_cookie_cb == NULL ||
s->ctx->app_gen_cookie_cb(s, s->d1->cookie,
@@ -752,12 +924,8 @@ int dtls1_send_server_hello(SSL *s)
/* Do the message type and length last */
d=p= &(buf[DTLS1_HM_HEADER_LENGTH]);
- if (s->client_version == DTLS1_BAD_VER)
- *(p++)=DTLS1_BAD_VER>>8,
- *(p++)=DTLS1_BAD_VER&0xff;
- else
- *(p++)=s->version>>8,
- *(p++)=s->version&0xff;
+ *(p++)=s->version>>8;
+ *(p++)=s->version&0xff;
/* Random stuff */
memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
@@ -863,6 +1031,13 @@ int dtls1_send_server_key_exchange(SSL *s)
#ifndef OPENSSL_NO_DH
DH *dh=NULL,*dhp;
#endif
+#ifndef OPENSSL_NO_ECDH
+ EC_KEY *ecdh=NULL, *ecdhp;
+ unsigned char *encodedPoint = NULL;
+ int encodedlen = 0;
+ int curve_id = 0;
+ BN_CTX *bn_ctx = NULL;
+#endif
EVP_PKEY *pkey;
unsigned char *p,*d;
int al,i;
@@ -877,7 +1052,7 @@ int dtls1_send_server_key_exchange(SSL *s)
EVP_MD_CTX_init(&md_ctx);
if (s->state == SSL3_ST_SW_KEY_EXCH_A)
{
- type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
+ type=s->s3->tmp.new_cipher->algorithm_mkey;
cert=s->cert;
buf=s->init_buf;
@@ -971,6 +1146,141 @@ int dtls1_send_server_key_exchange(SSL *s)
}
else
#endif
+#ifndef OPENSSL_NO_ECDH
+ if (type & SSL_kEECDH)
+ {
+ const EC_GROUP *group;
+
+ ecdhp=cert->ecdh_tmp;
+ if ((ecdhp == NULL) && (s->cert->ecdh_tmp_cb != NULL))
+ {
+ ecdhp=s->cert->ecdh_tmp_cb(s,
+ SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
+ SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
+ }
+ if (ecdhp == NULL)
+ {
+ al=SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY);
+ goto f_err;
+ }
+
+ if (s->s3->tmp.ecdh != NULL)
+ {
+ EC_KEY_free(s->s3->tmp.ecdh);
+ SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+ /* Duplicate the ECDH structure. */
+ if (ecdhp == NULL)
+ {
+ SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
+ goto err;
+ }
+ if ((ecdh = EC_KEY_dup(ecdhp)) == NULL)
+ {
+ SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
+ goto err;
+ }
+
+ s->s3->tmp.ecdh=ecdh;
+ if ((EC_KEY_get0_public_key(ecdh) == NULL) ||
+ (EC_KEY_get0_private_key(ecdh) == NULL) ||
+ (s->options & SSL_OP_SINGLE_ECDH_USE))
+ {
+ if(!EC_KEY_generate_key(ecdh))
+ {
+ SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
+ goto err;
+ }
+ }
+
+ if (((group = EC_KEY_get0_group(ecdh)) == NULL) ||
+ (EC_KEY_get0_public_key(ecdh) == NULL) ||
+ (EC_KEY_get0_private_key(ecdh) == NULL))
+ {
+ SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
+ goto err;
+ }
+
+ if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
+ (EC_GROUP_get_degree(group) > 163))
+ {
+ SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
+ goto err;
+ }
+
+ /* XXX: For now, we only support ephemeral ECDH
+ * keys over named (not generic) curves. For
+ * supported named curves, curve_id is non-zero.
+ */
+ if ((curve_id =
+ tls1_ec_nid2curve_id(EC_GROUP_get_curve_name(group)))
+ == 0)
+ {
+ SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNSUPPORTED_ELLIPTIC_CURVE);
+ goto err;
+ }
+
+ /* Encode the public key.
+ * First check the size of encoding and
+ * allocate memory accordingly.
+ */
+ encodedlen = EC_POINT_point2oct(group,
+ EC_KEY_get0_public_key(ecdh),
+ POINT_CONVERSION_UNCOMPRESSED,
+ NULL, 0, NULL);
+
+ encodedPoint = (unsigned char *)
+ OPENSSL_malloc(encodedlen*sizeof(unsigned char));
+ bn_ctx = BN_CTX_new();
+ if ((encodedPoint == NULL) || (bn_ctx == NULL))
+ {
+ SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+
+ encodedlen = EC_POINT_point2oct(group,
+ EC_KEY_get0_public_key(ecdh),
+ POINT_CONVERSION_UNCOMPRESSED,
+ encodedPoint, encodedlen, bn_ctx);
+
+ if (encodedlen == 0)
+ {
+ SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
+ goto err;
+ }
+
+ BN_CTX_free(bn_ctx); bn_ctx=NULL;
+
+ /* XXX: For now, we only support named (not
+ * generic) curves in ECDH ephemeral key exchanges.
+ * In this situation, we need four additional bytes
+ * to encode the entire ServerECDHParams
+ * structure.
+ */
+ n = 4 + encodedlen;
+
+ /* We'll generate the serverKeyExchange message
+ * explicitly so we can set these to NULLs
+ */
+ r[0]=NULL;
+ r[1]=NULL;
+ r[2]=NULL;
+ r[3]=NULL;
+ }
+ else
+#endif /* !OPENSSL_NO_ECDH */
+#ifndef OPENSSL_NO_PSK
+ if (type & SSL_kPSK)
+ {
+ /* reserve size for record length and PSK identity hint*/
+ n+=2+strlen(s->ctx->psk_identity_hint);
+ }
+ else
+#endif /* !OPENSSL_NO_PSK */
{
al=SSL_AD_HANDSHAKE_FAILURE;
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
@@ -982,9 +1292,10 @@ int dtls1_send_server_key_exchange(SSL *s)
n+=2+nr[i];
}
- if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
+ if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
+ && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
{
- if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
+ if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher, NULL))
== NULL)
{
al=SSL_AD_DECODE_ERROR;
@@ -1013,6 +1324,41 @@ int dtls1_send_server_key_exchange(SSL *s)
p+=nr[i];
}
+#ifndef OPENSSL_NO_ECDH
+ if (type & SSL_kEECDH)
+ {
+ /* XXX: For now, we only support named (not generic) curves.
+ * In this situation, the serverKeyExchange message has:
+ * [1 byte CurveType], [2 byte CurveName]
+ * [1 byte length of encoded point], followed by
+ * the actual encoded point itself
+ */
+ *p = NAMED_CURVE_TYPE;
+ p += 1;
+ *p = 0;
+ p += 1;
+ *p = curve_id;
+ p += 1;
+ *p = encodedlen;
+ p += 1;
+ memcpy((unsigned char*)p,
+ (unsigned char *)encodedPoint,
+ encodedlen);
+ OPENSSL_free(encodedPoint);
+ p += encodedlen;
+ }
+#endif
+
+#ifndef OPENSSL_NO_PSK
+ if (type & SSL_kPSK)
+ {
+ /* copy PSK identity hint */
+ s2n(strlen(s->ctx->psk_identity_hint), p);
+ strncpy((char *)p, s->ctx->psk_identity_hint, strlen(s->ctx->psk_identity_hint));
+ p+=strlen(s->ctx->psk_identity_hint);
+ }
+#endif
+
/* not anonymous */
if (pkey != NULL)
{
@@ -1066,6 +1412,25 @@ int dtls1_send_server_key_exchange(SSL *s)
}
else
#endif
+#if !defined(OPENSSL_NO_ECDSA)
+ if (pkey->type == EVP_PKEY_EC)
+ {
+ /* let's do ECDSA */
+ EVP_SignInit_ex(&md_ctx,EVP_ecdsa(), NULL);
+ EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
+ EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
+ EVP_SignUpdate(&md_ctx,&(d[DTLS1_HM_HEADER_LENGTH]),n);
+ if (!EVP_SignFinal(&md_ctx,&(p[2]),
+ (unsigned int *)&i,pkey))
+ {
+ SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_ECDSA);
+ goto err;
+ }
+ s2n(i,p);
+ n+=i+2;
+ }
+ else
+#endif
{
/* Is this error check actually needed? */
al=SSL_AD_HANDSHAKE_FAILURE;
@@ -1092,6 +1457,10 @@ int dtls1_send_server_key_exchange(SSL *s)
f_err:
ssl3_send_alert(s,SSL3_AL_FATAL,al);
err:
+#ifndef OPENSSL_NO_ECDH
+ if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
+ BN_CTX_free(bn_ctx);
+#endif
EVP_MD_CTX_cleanup(&md_ctx);
return(-1);
}
@@ -1205,14 +1574,15 @@ int dtls1_send_server_certificate(SSL *s)
if (s->state == SSL3_ST_SW_CERT_A)
{
x=ssl_get_server_send_cert(s);
- if (x == NULL &&
- /* VRS: allow null cert if auth == KRB5 */
- (s->s3->tmp.new_cipher->algorithms
- & (SSL_MKEY_MASK|SSL_AUTH_MASK))
- != (SSL_aKRB5|SSL_kKRB5))
+ if (x == NULL)
{
- SSLerr(SSL_F_DTLS1_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR);
- return(0);
+ /* VRS: allow null cert if auth == KRB5 */
+ if ((s->s3->tmp.new_cipher->algorithm_mkey != SSL_kKRB5) ||
+ (s->s3->tmp.new_cipher->algorithm_auth != SSL_aKRB5))
+ {
+ SSLerr(SSL_F_DTLS1_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR);
+ return(0);
+ }
}
l=dtls1_output_cert_chain(s,x);
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