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Added options to SNI (now it is possible to choose whether or not to abort on a SNI Host Name mismatch) 

Exposed SNI Type at ssl.h
This commit is contained in:
Moisés Guimarães 2013-05-30 15:22:38 -03:00
parent baa012b1d9
commit 5c665fe614
5 changed files with 74 additions and 20 deletions
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18
cyassl/internal.h
View File

@ -1151,19 +1151,23 @@ CYASSL_LOCAL int TLSX_Parse(CYASSL* ssl, byte* input, word16 length,
/* Server Name Indication */
#ifdef HAVE_SNI
typedef enum {
HOST_NAME = 0
} SNI_Type;
typedef struct SNI {
SNI_Type type; /* SNI Type */
union { char* host_name; } data; /* SNI Data */
struct SNI* next; /* List Behavior */
byte type; /* SNI Type */
union { char* host_name; } data; /* SNI Data */
struct SNI* next; /* List Behavior */
#ifndef NO_CYASSL_SERVER
byte options; /* Behaviour options */
#endif
} SNI;
CYASSL_LOCAL int TLSX_UseSNI(TLSX** extensions, byte type, const void* data,
word16 size);
#ifndef NO_CYASSL_SERVER
CYASSL_LOCAL void TLSX_SNI_SetOptions(TLSX* extensions, byte type,
byte options);
#endif
#endif /* HAVE_SNI */
#endif /* HAVE_TLS_EXTENSIONS */

17
cyassl/ssl.h
View File

@ -931,10 +931,27 @@ CYASSL_API int CyaSSL_CTX_UseCavium(CYASSL_CTX*, int devId);
/* tls extensions */
#ifdef HAVE_SNI
/* SNI types */
enum {
CYASSL_SNI_HOST_NAME = 0
};
CYASSL_API int CyaSSL_UseSNI(CYASSL* ssl, unsigned char type, const void* data,
unsigned short size);
CYASSL_API int CyaSSL_CTX_UseSNI(CYASSL_CTX* ctx, unsigned char type,
const void* data, unsigned short size);
#ifndef NO_CYASSL_SERVER
/* SNI options */
enum {
CYASSL_SNI_ABORT_ON_MISMATCH = 0x01
};
CYASSL_API void CyaSSL_SNI_SetOptions(CYASSL* ssl, unsigned char type,
unsigned char options);
CYASSL_API void CyaSSL_CTX_SNI_SetOptions(CYASSL_CTX* ctx, unsigned char type,
unsigned char options);
#endif
#endif
#define CYASSL_CRL_MONITOR 0x01 /* monitor this dir flag */

9
examples/server/server.c
View File

@ -408,9 +408,14 @@ THREAD_RETURN CYASSL_THREAD server_test(void* args)
#endif
#ifdef HAVE_SNI
if (sniHostName)
if (CyaSSL_CTX_UseSNI(ctx, 0, sniHostName, XSTRLEN(sniHostName)))
if (sniHostName) {
if (CyaSSL_CTX_UseSNI(ctx, CYASSL_SNI_HOST_NAME, sniHostName,
XSTRLEN(sniHostName)))
err_sys("UseSNI failed");
else
CyaSSL_CTX_SNI_SetOptions(ctx, CYASSL_SNI_HOST_NAME,
CYASSL_SNI_ABORT_ON_MISMATCH);
}
#endif
ssl = SSL_new(ctx);

15
src/ssl.c
View File

@ -529,6 +529,21 @@ int CyaSSL_CTX_UseSNI(CYASSL_CTX* ctx, unsigned char type, const void* data,
return TLSX_UseSNI(&ctx->extensions, type, data, size);
}
#ifndef NO_CYASSL_SERVER
void CyaSSL_SNI_SetOptions(CYASSL* ssl, unsigned char type,
unsigned char options)
{
if (ssl && ssl->extensions)
TLSX_SNI_SetOptions(ssl->extensions, type, options);
}
void CyaSSL_CTX_SNI_SetOptions(CYASSL_CTX* ctx, unsigned char type,
unsigned char options)
{
if (ctx && ctx->extensions)
TLSX_SNI_SetOptions(ctx->extensions, type, options);
}
#endif
#endif /* HAVE_SNI */
#ifndef CYASSL_LEANPSK

35
src/tls.c
View File

@ -531,7 +531,7 @@ static void TLSX_SNI_Free(SNI* sni)
{
if (sni) {
switch (sni->type) {
case HOST_NAME:
case CYASSL_SNI_HOST_NAME:
XFREE(sni->data.host_name, 0, DYNAMIC_TYPE_TLSX);
break;
}
@ -550,8 +550,7 @@ static void TLSX_SNI_FreeAll(SNI* list)
}
}
static int TLSX_SNI_Append(SNI** list, SNI_Type type, const void* data,
word16 size)
static int TLSX_SNI_Append(SNI** list, byte type, const void* data, word16 size)
{
SNI* sni;
@ -562,7 +561,7 @@ static int TLSX_SNI_Append(SNI** list, SNI_Type type, const void* data,
return MEMORY_E;
switch (type) {
case HOST_NAME: {
case CYASSL_SNI_HOST_NAME: {
sni->data.host_name = XMALLOC(size + 1, 0, DYNAMIC_TYPE_TLSX);
if (sni->data.host_name) {
@ -583,6 +582,7 @@ static int TLSX_SNI_Append(SNI** list, SNI_Type type, const void* data,
sni->type = type;
sni->next = *list;
sni->options = 0;
*list = sni;
return 0;
@ -599,7 +599,7 @@ static word16 TLSX_SNI_GetSize(SNI* list)
length += ENUM_LEN + OPAQUE16_LEN; /* sni type + sni length */
switch (sni->type) {
case HOST_NAME:
case CYASSL_SNI_HOST_NAME:
length += XSTRLEN((char*) sni->data.host_name);
break;
}
@ -620,7 +620,7 @@ static word16 TLSX_SNI_Write(SNI* list, byte* output)
output[offset++] = sni->type; /* sni type */
switch (sni->type) {
case HOST_NAME:
case CYASSL_SNI_HOST_NAME:
length = XSTRLEN((char*) sni->data.host_name);
c16toa(length, output + offset); /* sni length */
@ -638,7 +638,7 @@ static word16 TLSX_SNI_Write(SNI* list, byte* output)
return offset;
}
static SNI* TLSX_SNI_Find(SNI *list, SNI_Type type)
static SNI* TLSX_SNI_Find(SNI *list, byte type)
{
SNI *sni = list;
@ -691,7 +691,7 @@ static int TLSX_SNI_Parse(CYASSL* ssl, byte* input, word16 length,
for (size = 0; offset < length; offset += size) {
SNI *sni;
SNI_Type type = input[offset++];
byte type = input[offset++];
if (offset + OPAQUE16_LEN > length)
return INCOMPLETE_DATA;
@ -707,9 +707,11 @@ static int TLSX_SNI_Parse(CYASSL* ssl, byte* input, word16 length,
}
switch(type) {
case HOST_NAME:
if (XSTRNCMP(sni->data.host_name,
(const char *) input + offset, size)) {
case CYASSL_SNI_HOST_NAME:
if ((sni->options & CYASSL_SNI_ABORT_ON_MISMATCH)
&& ((XSTRLEN(sni->data.host_name) != size)
|| XSTRNCMP(sni->data.host_name,
(const char *) input + offset, size))) {
SendAlert(ssl, alert_fatal, unrecognized_name);
return UNKNOWN_SNI_HOST_NAME_E;
@ -776,6 +778,17 @@ int TLSX_UseSNI(TLSX** extensions, byte type, const void* data, word16 size)
return 0;
}
#ifndef NO_CYASSL_SERVER
void TLSX_SNI_SetOptions(TLSX* extensions, byte type, byte options)
{
TLSX* extension = TLSX_Find(extensions, SERVER_NAME_INDICATION);
SNI* sni = TLSX_SNI_Find(extension ? extension->data : NULL, type);
if (sni)
sni->options = options;
}
#endif
#define SNI_FREE_ALL TLSX_SNI_FreeAll
#define SNI_GET_SIZE TLSX_SNI_GetSize
#define SNI_WRITE TLSX_SNI_Write