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Renames TLSX_Append to TLSX_Push, adding data param and making sure the list doesn't holds duplicate extensions.

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Adds SecureRenegotiation functions
This commit is contained in:
Moisés Guimarães 2014-09-16 20:33:17 -03:00
parent 89b972d946
commit d80e820654
7 changed files with 100 additions and 41 deletions
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18
configure.ac
View File

@ -1321,7 +1321,7 @@ then
AM_CFLAGS="$AM_CFLAGS -DHAVE_TLS_EXTENSIONS -DHAVE_TRUNCATED_HMAC"
fi
# Renegotiation Indication
# Renegotiation Indication - (FAKE Secure Renegotiation)
AC_ARG_ENABLE([renegotiation-indication],
[ --enable-renegotiation-indication Enable Renegotiation Indication (default: disabled)],
[ ENABLED_RENEGOTIATION_INDICATION=$enableval ],
@ -1333,6 +1333,18 @@ then
AM_CFLAGS="$AM_CFLAGS -DHAVE_RENEGOTIATION_INDICATION"
fi
# Secure Renegotiation
AC_ARG_ENABLE([secure-renegotiation],
[ --enable-secure-renegotiation Enable Secure Renegotiation (default: disabled)],
[ ENABLED_SECURE_RENEGOTIATION=$enableval ],
[ ENABLED_SECURE_RENEGOTIATION=no ]
)
if test "x$ENABLED_SECURE_RENEGOTIATION" = "xyes"
then
AM_CFLAGS="$AM_CFLAGS -DHAVE_TLS_EXTENSIONS -DHAVE_SECURE_RENEGOTIATION"
fi
# Supported Elliptic Curves Extensions
AC_ARG_ENABLE([supportedcurves],
[ --enable-supportedcurves Enable Supported Elliptic Curves (default: disabled)],
@ -1357,9 +1369,8 @@ then
ENABLED_SNI=yes
ENABLED_MAX_FRAGMENT=yes
ENABLED_TRUNCATED_HMAC=yes
ENABLED_RENEGOTIATION_INDICATION=yes
ENABLED_SUPPORTED_CURVES=yes
AM_CFLAGS="$AM_CFLAGS -DHAVE_TLS_EXTENSIONS -DHAVE_SNI -DHAVE_MAX_FRAGMENT -DHAVE_TRUNCATED_HMAC -DHAVE_RENEGOTIATION_INDICATION -DHAVE_SUPPORTED_CURVES"
AM_CFLAGS="$AM_CFLAGS -DHAVE_TLS_EXTENSIONS -DHAVE_SNI -DHAVE_MAX_FRAGMENT -DHAVE_TRUNCATED_HMAC -DHAVE_SUPPORTED_CURVES"
fi
# PKCS7
@ -1860,6 +1871,7 @@ echo " * SNI: $ENABLED_SNI"
echo " * Maximum Fragment Length: $ENABLED_MAX_FRAGMENT"
echo " * Truncated HMAC: $ENABLED_TRUNCATED_HMAC"
echo " * Renegotiation Indication: $ENABLED_RENEGOTIATION_INDICATION"
echo " * Secure Renegotiation: $ENABLED_SECURE_RENEGOTIATION"
echo " * Supported Elliptic Curves: $ENABLED_SUPPORTED_CURVES"
echo " * All TLS Extensions: $ENABLED_TLSX"
echo " * PKCS#7 $ENABLED_PKCS7"

1
cyassl/error-ssl.h
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@ -118,6 +118,7 @@ enum CyaSSL_ErrorCodes {
KEYUSE_ENCIPHER_E = -385, /* KeyUse keyEncipher error */
EXTKEYUSE_AUTH_E = -386, /* ExtKeyUse server|client_auth */
SEND_OOB_READ_E = -387, /* Send Cb out of bounds read */
SECURE_RENEGOTIATION_E = -388, /* Invalid Renegotiation Info */
/* add strings to SetErrorString !!!!! */
/* begin negotiation parameter errors */

5
cyassl/internal.h
View File

@ -1262,7 +1262,7 @@ CYASSL_LOCAL int TLSX_ValidateEllipticCurves(CYASSL* ssl, byte first,
/* Additional Conection State according to rfc5746 section 3.1 */
typedef struct SecureRenegotiation {
byte secure_renegotation;
byte enabled; /* secure_renegotiation flag from rfc */
byte client_verify_data[TLS_FINISHED_SZ];
byte server_verify_data[TLS_FINISHED_SZ];
} SecureRenegotiation;
@ -1896,7 +1896,7 @@ typedef struct DtlsMsg {
typedef struct SecureR_State {
byte client_verify_data[TLS_FINISHED_SZ]; /* previous handshake value */
byte server_verify_data[TLS_FINISHED_SZ]; /* previous handshake value */
byte secure_renegotation; /* extensions flag */
byte secure_renegotiation; /* extensions flag */
byte previous_handshake_used; /* did previous handshake use secure r */
byte enabled; /* runtime allowed? */
} SecureR_State;
@ -2016,6 +2016,7 @@ struct CYASSL {
#endif
#ifdef HAVE_SECURE_RENEGOTIATION
SecureR_State secureR_state; /* secure renegotiation state */
SecureRenegotiation* secure_renegotiation;
#endif
#endif /* HAVE_TLS_EXTENSIONS */
#ifdef HAVE_NETX

28
cyassl/ssl.h
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@ -1216,6 +1216,7 @@ CYASSL_API int CyaSSL_CTX_UseCavium(CYASSL_CTX*, int devId);
/* Server Name Indication */
#ifdef HAVE_SNI
/* SNI types */
enum {
CYASSL_SNI_HOST_NAME = 0
@ -1227,6 +1228,7 @@ 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_CONTINUE_ON_MISMATCH = 0x01, /* do not abort on mismatch flag */
@ -1249,16 +1251,16 @@ CYASSL_API unsigned char CyaSSL_SNI_Status(CYASSL* ssl, unsigned char type);
CYASSL_API unsigned short CyaSSL_SNI_GetRequest(CYASSL *ssl, unsigned char type,
void** data);
CYASSL_API int CyaSSL_SNI_GetFromBuffer(
const unsigned char* clientHello, unsigned int helloSz,
unsigned char type, unsigned char* sni, unsigned int* inOutSz);
#endif /* NO_CYASSL_SERVER */
#endif /* HAVE_SNI */
#endif
#endif
/* Maximum Fragment Length */
#ifdef HAVE_MAX_FRAGMENT
/* Fragment lengths */
enum {
CYASSL_MFL_2_9 = 1, /* 512 bytes */
@ -1273,8 +1275,8 @@ enum {
CYASSL_API int CyaSSL_UseMaxFragment(CYASSL* ssl, unsigned char mfl);
CYASSL_API int CyaSSL_CTX_UseMaxFragment(CYASSL_CTX* ctx, unsigned char mfl);
#endif /* NO_CYASSL_CLIENT */
#endif /* HAVE_MAX_FRAGMENT */
#endif
#endif
/* Truncated HMAC */
#ifdef HAVE_TRUNCATED_HMAC
@ -1283,8 +1285,8 @@ CYASSL_API int CyaSSL_CTX_UseMaxFragment(CYASSL_CTX* ctx, unsigned char mfl);
CYASSL_API int CyaSSL_UseTruncatedHMAC(CYASSL* ssl);
CYASSL_API int CyaSSL_CTX_UseTruncatedHMAC(CYASSL_CTX* ctx);
#endif /* NO_CYASSL_CLIENT */
#endif /* HAVE_TRUNCATED_HMAC */
#endif
#endif
/* Elliptic Curves */
#ifdef HAVE_SUPPORTED_CURVES
@ -1304,9 +1306,17 @@ CYASSL_API int CyaSSL_UseSupportedCurve(CYASSL* ssl, unsigned short name);
CYASSL_API int CyaSSL_CTX_UseSupportedCurve(CYASSL_CTX* ctx,
unsigned short name);
#endif /* NO_CYASSL_CLIENT */
#endif /* HAVE_SUPPORTED_CURVES */
#endif
#endif
/* Secure Renegotiation */
#ifdef HAVE_SECURE_RENEGOTIATION
#ifndef NO_CYASSL_CLIENT
CYASSL_API int CyaSSL_UseSecureRenegotiation(CYASSL* ssl);
#endif
#endif
#define CYASSL_CRL_MONITOR 0x01 /* monitor this dir flag */
#define CYASSL_CRL_START_MON 0x02 /* start monitoring flag */

5
src/internal.c
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@ -1738,6 +1738,9 @@ int InitSSL(CYASSL* ssl, CYASSL_CTX* ctx)
#ifdef HAVE_TRUNCATED_HMAC
ssl->truncated_hmac = 0;
#endif
#ifdef HAVE_SECURE_RENEGOTIATION
ssl->secure_renegotiation = NULL;
#endif
#endif
ssl->rng = NULL;
@ -1773,7 +1776,7 @@ int InitSSL(CYASSL* ssl, CYASSL_CTX* ctx)
#endif /* HAVE_PK_CALLBACKS */
#if defined(HAVE_SECURE_RENEGOTIATION) && defined(HAVE_TLS_EXTENSIONS)
ssl->secureR_state.secure_renegotation = 0;
ssl->secureR_state.secure_renegotiation = 0;
ssl->secureR_state.previous_handshake_used = 0;
ssl->secureR_state.enabled = 0;
#endif /* HAVE_SECURE_RENEGOTIATION && HAVE_TLS_EXTENSIONS */

21
src/ssl.c
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@ -714,6 +714,27 @@ int CyaSSL_CTX_UseSupportedCurve(CYASSL_CTX* ctx, word16 name)
#endif /* NO_CYASSL_CLIENT */
#endif /* HAVE_SUPPORTED_CURVES */
/* Secure Renegotiation */
#ifdef HAVE_SECURE_RENEGOTIATION
int CyaSSL_UseSecureRenegotiation(CYASSL* ssl)
{
int ret = BAD_FUNC_ARG;
if (ssl)
ret = TLSX_UseSecureRenegotiation(&ssl->extensions);
if (ret == SSL_SUCCESS) {
TLSX* extension = TLSX_Find(ssl->extensions, SECURE_RENEGOTIATION);
if (extension)
ssl->secure_renegotiation = (SecureRenegotiation*)extension->data;
}
return ret;
}
#endif
#ifndef CYASSL_LEANPSK
int CyaSSL_send(CYASSL* ssl, const void* data, int sz, int flags)

59
src/tls.c
View File

@ -1617,7 +1617,7 @@ static byte TLSX_SCR_GetSize(SecureRenegotiation* data, int isRequest)
{
byte length = OPAQUE8_LEN; /* RenegotiationInfo length */
if (data->secure_renegotiation) {
if (data->enabled) {
/* client sends client_verify_data only */
length += TLS_FINISHED_SZ;
@ -1636,7 +1636,7 @@ static word16 TLSX_SCR_Write(SecureRenegotiation* data, byte* output,
output[0] = TLSX_SCR_GetSize(data, isRequest);
if (data->secure_renegotiation) {
if (data->enabled) {
/* client sends client_verify_data only */
XMEMCPY(output + offset, data->client_verify_data, TLS_FINISHED_SZ);
offset += TLS_FINISHED_SZ;
@ -1654,33 +1654,44 @@ static word16 TLSX_SCR_Write(SecureRenegotiation* data, byte* output,
static int TLSX_SCR_Parse(CYASSL* ssl, byte* input, word16 length,
byte isRequest)
{
if (length != ENUM_LEN)
return BUFFER_ERROR;
switch (*input) {
case CYASSL_MFL_2_9 : ssl->max_fragment = 512; break;
case CYASSL_MFL_2_10: ssl->max_fragment = 1024; break;
case CYASSL_MFL_2_11: ssl->max_fragment = 2048; break;
case CYASSL_MFL_2_12: ssl->max_fragment = 4096; break;
case CYASSL_MFL_2_13: ssl->max_fragment = 8192; break;
default:
SendAlert(ssl, alert_fatal, illegal_parameter);
return UNKNOWN_MAX_FRAG_LEN_E;
}
int ret = SECURE_RENEGOTIATION_E;
if (length >= OPAQUE8_LEN && *input == (length - OPAQUE8_LEN)) {
if (ssl->secure_renegotiation == NULL) {
#ifndef NO_CYASSL_SERVER
if (isRequest) {
int r = TLSX_UseMaxFragment(&ssl->extensions, *input);
if (r != SSL_SUCCESS) return r; /* throw error */
TLSX_SetResponse(ssl, MAX_FRAGMENT_LENGTH);
if (isRequest && *input == 0) {
ret = CyaSSL_UseSecureRenegotiation(ssl);
}
#endif
}
else if (isRequest) {
#ifndef NO_CYASSL_SERVER
if (*input == TLS_FINISHED_SZ) {
/* TODO compare client_verify_data */
ret = 0;
}
#endif
}
else {
#ifndef NO_CYASSL_CLIENT
if (!ssl->secure_renegotiation->enabled) {
if (*input == 0) {
ssl->secure_renegotiation->enabled = 1;
ret = 0;
}
}
else if (*input == 2 * TLS_FINISHED_SZ) {
/* TODO compare client_verify_data and server_verify_data */
ret = 0;
}
#endif
}
}
return 0;
if (ret != 0)
SendAlert(ssl, alert_fatal, handshake_failure);
return ret;
}
int TLSX_UseSecureRenegotiation(TLSX** extensions)