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Add support for arbitrary TLS extensions.

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Contributed by Trevor Perrin.
This commit is contained in:
Trevor
2013-05-12 18:55:27 -07:00
committed by Ben Laurie
parent 6d84daa5d6
commit a398f821fa
17 changed files with 791 additions and 5 deletions
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62
apps/s_client.c
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@@ -365,6 +365,9 @@ static void sc_usage(void)
# ifndef OPENSSL_NO_NEXTPROTONEG
BIO_printf(bio_err," -nextprotoneg arg - enable NPN extension, considering named protocols supported (comma-separated list)\n");
# endif
#ifndef OPENSSL_NO_TLSEXT
BIO_printf(bio_err," -serverinfo types - send empty ClientHello extensions (comma-separated numbers)\n");
#endif
#endif
BIO_printf(bio_err," -legacy_renegotiation - enable use of legacy renegotiation (dangerous)\n");
BIO_printf(bio_err," -use_srtp profiles - Offer SRTP key management with a colon-separated profile list\n");
@@ -542,6 +545,26 @@ static int next_proto_cb(SSL *s, unsigned char **out, unsigned char *outlen, con
return SSL_TLSEXT_ERR_OK;
}
# endif /* ndef OPENSSL_NO_NEXTPROTONEG */
static int serverinfo_cli_cb(SSL* s, unsigned short ext_type,
const unsigned char* in, unsigned short inlen,
int* al, void* arg)
{
char pem_name[100];
unsigned char ext_buf[4 + 65536];
/* Reconstruct the type/len fields prior to extension data */
ext_buf[0] = ext_type >> 8;
ext_buf[1] = ext_type & 0xFF;
ext_buf[2] = inlen >> 8;
ext_buf[3] = inlen & 0xFF;
memcpy(ext_buf+4, in, inlen);
BIO_snprintf(pem_name, sizeof(pem_name), "SERVER_INFO %d", ext_type);
PEM_write_bio(bio_c_out, pem_name, "", ext_buf, 4 + inlen);
return 1;
}
#endif
enum
@@ -614,6 +637,9 @@ int MAIN(int argc, char **argv)
# ifndef OPENSSL_NO_NEXTPROTONEG
const char *next_proto_neg_in = NULL;
# endif
# define MAX_SI_TYPES 100
unsigned short serverinfo_types[MAX_SI_TYPES];
int serverinfo_types_count = 0;
#endif
char *sess_in = NULL;
char *sess_out = NULL;
@@ -968,6 +994,29 @@ static char *jpake_secret = NULL;
next_proto_neg_in = *(++argv);
}
# endif
else if (strcmp(*argv,"-serverinfo") == 0)
{
char *c;
int start = 0;
int len;
if (--argc < 1) goto bad;
c = *(++argv);
serverinfo_types_count = 0;
len = strlen(c);
for (i = 0; i <= len; ++i)
{
if (i == len || c[i] == ',')
{
serverinfo_types[serverinfo_types_count]
= atoi(c+start);
serverinfo_types_count++;
start = i+1;
}
if (serverinfo_types_count == MAX_SI_TYPES)
break;
}
}
#endif
#ifdef FIONBIO
else if (strcmp(*argv,"-nbio") == 0)
@@ -1261,6 +1310,19 @@ bad:
if (next_proto.data)
SSL_CTX_set_next_proto_select_cb(ctx, next_proto_cb, &next_proto);
#endif
#ifndef OPENSSL_NO_TLSEXT
if (serverinfo_types_count)
{
for (i = 0; i < serverinfo_types_count; i++)
{
SSL_CTX_set_custom_cli_ext(ctx,
serverinfo_types[i],
NULL,
serverinfo_cli_cb,
NULL);
}
}
#endif
if (state) SSL_CTX_set_info_callback(ctx,apps_ssl_info_callback);
#if 0