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Convert NextProto message construction to WPACKET

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Reviewed-by: Rich Salz <rsalz@openssl.org>
This commit is contained in:
Matt Caswell 2016-09-14 12:10:33 +01:00
parent c49e191230
commit 15e6be6c5c
3 changed files with 33 additions and 11 deletions
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1
include/openssl/ssl.h
View File

@ -2232,6 +2232,7 @@ int ERR_load_SSL_strings(void);
# define SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY 358
# define SSL_F_TLS_CONSTRUCT_FINISHED 359
# define SSL_F_TLS_CONSTRUCT_HELLO_REQUEST 373
# define SSL_F_TLS_CONSTRUCT_NEXT_PROTO 426
# define SSL_F_TLS_CONSTRUCT_SERVER_CERTIFICATE 374
# define SSL_F_TLS_CONSTRUCT_SERVER_DONE 375
# define SSL_F_TLS_CONSTRUCT_SERVER_HELLO 376

1
ssl/ssl_err.c
View File

@ -257,6 +257,7 @@ static ERR_STRING_DATA SSL_str_functs[] = {
{ERR_FUNC(SSL_F_TLS_CONSTRUCT_FINISHED), "tls_construct_finished"},
{ERR_FUNC(SSL_F_TLS_CONSTRUCT_HELLO_REQUEST),
"tls_construct_hello_request"},
{ERR_FUNC(SSL_F_TLS_CONSTRUCT_NEXT_PROTO), "tls_construct_next_proto"},
{ERR_FUNC(SSL_F_TLS_CONSTRUCT_SERVER_CERTIFICATE),
"tls_construct_server_certificate"},
{ERR_FUNC(SSL_F_TLS_CONSTRUCT_SERVER_DONE), "tls_construct_server_done"},

42
ssl/statem/statem_clnt.c
View File

@ -2895,22 +2895,42 @@ int ssl3_check_cert_and_algorithm(SSL *s)
#ifndef OPENSSL_NO_NEXTPROTONEG
int tls_construct_next_proto(SSL *s)
{
unsigned int len, padding_len;
unsigned char *d;
size_t len, padding_len;
unsigned char *padding = NULL;
WPACKET pkt;
if (!WPACKET_init(&pkt, s->init_buf)) {
/* Should not happen */
SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR);
goto err;
}
if (!ssl_set_handshake_header2(s, &pkt, SSL3_MT_NEXT_PROTO)) {
SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR);
goto err;
}
len = s->next_proto_negotiated_len;
padding_len = 32 - ((len + 2) % 32);
d = (unsigned char *)s->init_buf->data;
d[4] = len;
memcpy(d + 5, s->next_proto_negotiated, len);
d[5 + len] = padding_len;
memset(d + 6 + len, 0, padding_len);
*(d++) = SSL3_MT_NEXT_PROTO;
l2n3(2 + len + padding_len, d);
s->init_num = 4 + 2 + len + padding_len;
s->init_off = 0;
if (!WPACKET_sub_memcpy_u8(&pkt, s->next_proto_negotiated, len)
|| !WPACKET_sub_allocate_bytes_u8(&pkt, padding_len, &padding)) {
SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR);
goto err;
}
memset(padding, 0, padding_len);
if (!ssl_close_construct_packet(s, &pkt)) {
SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR);
goto err;
}
return 1;
err:
WPACKET_cleanup(&pkt);
ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
return 0;
}
#endif