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add function wolfSSL_CTX_get_max_proto_version and handling for edge cases

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This commit is contained in:
JacobBarthelmeh
2021-09-16 01:01:38 -07:00
parent 1acf64a782
commit f2bce42bbd
4 changed files with 139 additions and 40 deletions
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147
src/ssl.c
View File

@ -16947,33 +16947,57 @@ static int Set_CTX_min_proto_version(WOLFSSL_CTX* ctx, int version)
int wolfSSL_CTX_set_min_proto_version(WOLFSSL_CTX* ctx, int version)
{
const int verTbl[] = {SSL3_VERSION, TLS1_VERSION, TLS1_1_VERSION,
TLS1_2_VERSION, TLS1_3_VERSION,DTLS1_VERSION,
TLS1_2_VERSION, TLS1_3_VERSION, DTLS1_VERSION,
DTLS1_2_VERSION};
int tblSz = sizeof(verTbl);
int i;
int ret;
int proto;
int maxProto;
int i;
int idx = 0;
WOLFSSL_ENTER("wolfSSL_CTX_set_min_proto_version");
(void)verTbl;
(void)tblSz;
(void)i;
(void)ret;
if (ctx == NULL) {
return WOLFSSL_FAILURE;
}
if (version != 0) {
return Set_CTX_min_proto_version(ctx, version);
}
/* when 0 is specified as version, try to find out the min version */
for (i= 0; i < tblSz; i++) {
ret = Set_CTX_min_proto_version(ctx, verTbl[i]);
if (ret == WOLFSSL_SUCCESS)
proto = version;
wolfSSL_CTX_clear_options(ctx, WOLFSSL_OP_MIN_PROTO);
for (i = 0; i < tblSz; i++) {
if (verTbl[i] == version) {
break;
}
}
}
else {
/* when 0 is specified as version, try to find out the min version */
for (i = 0; i < tblSz; i++) {
ret = Set_CTX_min_proto_version(ctx, verTbl[i]);
if (ret == WOLFSSL_SUCCESS) {
proto = verTbl[i];
wolfSSL_CTX_set_options(ctx, WOLFSSL_OP_MIN_PROTO);
break;
}
}
}
/* check case where max > min , if so then clear the NO_* options
* i is the index into the table for proto version used, see if the max
* proto version index found is smaller */
maxProto = wolfSSL_CTX_get_max_proto_version(ctx);
for (idx = 0; idx < tblSz; idx++) {
if (verTbl[idx] == maxProto) {
break;
}
}
if (idx < i) {
wolfSSL_CTX_clear_options(ctx, WOLFSSL_OP_NO_TLSv1 |
WOLFSSL_OP_NO_TLSv1_1 | WOLFSSL_OP_NO_TLSv1_2 |
WOLFSSL_OP_NO_TLSv1_3);
}
ret = Set_CTX_min_proto_version(ctx, proto);
return ret;
}
@ -17050,18 +17074,22 @@ int wolfSSL_CTX_set_max_proto_version(WOLFSSL_CTX* ctx, int version)
int tblSz = sizeof(verTbl);
int i;
int ret;
int minProto;
WOLFSSL_ENTER("wolfSSL_CTX_set_max_proto_version");
(void)verTbl;
(void)tblSz;
(void)i;
(void)ret;
if (ctx == NULL) {
return WOLFSSL_FAILURE;
}
/* clear out flags and reset min protocol version */
minProto = wolfSSL_CTX_get_min_proto_version(ctx);
wolfSSL_CTX_clear_options(ctx,
WOLFSSL_OP_NO_TLSv1 | WOLFSSL_OP_NO_TLSv1_1 |
WOLFSSL_OP_NO_TLSv1_2 | WOLFSSL_OP_NO_TLSv1_3);
wolfSSL_CTX_set_min_proto_version(ctx, minProto);
if (version != 0) {
wolfSSL_CTX_clear_options(ctx, WOLFSSL_OP_MAX_PROTO);
return Set_CTX_max_proto_version(ctx, version);
}
@ -17069,6 +17097,7 @@ int wolfSSL_CTX_set_max_proto_version(WOLFSSL_CTX* ctx, int version)
for (i= 0; i < tblSz; i++) {
ret = Set_CTX_max_proto_version(ctx, verTbl[i]);
if (ret == WOLFSSL_SUCCESS) {
wolfSSL_CTX_set_options(ctx, WOLFSSL_OP_MAX_PROTO);
break;
}
}
@ -17171,11 +17200,6 @@ int wolfSSL_set_min_proto_version(WOLFSSL* ssl, int version)
WOLFSSL_ENTER("wolfSSL_set_min_proto_version");
(void)verTbl;
(void)tblSz;
(void)i;
(void)ret;
if (ssl == NULL) {
return WOLFSSL_FAILURE;
}
@ -17248,11 +17272,6 @@ int wolfSSL_set_max_proto_version(WOLFSSL* ssl, int version)
WOLFSSL_ENTER("wolfSSL_set_max_proto_version");
(void)verTbl;
(void)tblSz;
(void)i;
(void)ret;
if (ssl == NULL) {
return WOLFSSL_FAILURE;
}
@ -17315,9 +17334,14 @@ WOLFSSL_API int wolfSSL_CTX_get_min_proto_version(WOLFSSL_CTX* ctx)
WOLFSSL_ENTER("wolfSSL_CTX_get_min_proto_version");
if (ctx != NULL) {
if (wolfSSL_CTX_get_options(ctx) & WOLFSSL_OP_MIN_PROTO) {
ret = 0;
}
else {
ret = GetMinProtoVersion(ctx->minDowngrade);
}
if (ret == 0) {
}
else {
ret = GetMinProtoVersion(WOLFSSL_MIN_DOWNGRADE);
}
@ -17326,6 +17350,63 @@ WOLFSSL_API int wolfSSL_CTX_get_min_proto_version(WOLFSSL_CTX* ctx)
return ret;
}
/* returns the maximum allowed protocol version given the 'options' used
* returns WOLFSSL_FATAL_ERROR on no match */
static int GetMaxProtoVersion(long options)
{
#ifdef WOLFSSL_TLS13
if (!(options & WOLFSSL_OP_NO_TLSv1_3))
return TLS1_3_VERSION;
#endif
#ifndef WOLFSSL_NO_TLS12
if (!(options & WOLFSSL_OP_NO_TLSv1_2))
return TLS1_2_VERSION;
#endif
#ifndef NO_OLD_TLS
if (!(options & WOLFSSL_OP_NO_TLSv1_1))
return TLS1_1_VERSION;
#ifdef WOLFSSL_ALLOW_TLSV10
if (!(options & WOLFSSL_OP_NO_TLSv1))
return TLS1_VERSION;
#endif
#ifdef WOLFSSL_ALLOW_SSLV3
if (!(options & WOLFSSL_OP_NO_SSLv3))
return SSL3_VERSION;
#endif
#endif
return WOLFSSL_FATAL_ERROR;
}
/* returns the maximum protocol version for 'ctx' */
int wolfSSL_CTX_get_max_proto_version(WOLFSSL_CTX* ctx)
{
int ret = 0;
long options = 0; /* default to nothing set */
WOLFSSL_ENTER("wolfSSL_CTX_get_max_proto_version");
if (ctx != NULL) {
options = wolfSSL_CTX_get_options(ctx);
}
if (options & WOLFSSL_OP_MAX_PROTO) {
ret = 0;
}
else {
ret = GetMaxProtoVersion(options);
}
WOLFSSL_LEAVE("wolfSSL_CTX_get_max_proto_version", ret);
if (ret == WOLFSSL_FATAL_ERROR) {
WOLFSSL_MSG("Error getting max proto version");
ret = 0; /* setting ret to 0 to match compat return */
}
return ret;
}
#endif /* OPENSSL_EXTRA */
#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL) || \
@ -44009,6 +44090,12 @@ long wolfSSL_CTX_ctrl(WOLFSSL_CTX* ctx, int cmd, long opt, void* pt)
case SSL_CTRL_SET_MAX_PROTO_VERSION:
WOLFSSL_MSG("set max proto version");
return wolfSSL_CTX_set_max_proto_version(ctx, (int)opt);
case SSL_CTRL_GET_MIN_PROTO_VERSION:
WOLFSSL_MSG("get min proto version");
return wolfSSL_CTX_get_min_proto_version(ctx);
case SSL_CTRL_GET_MAX_PROTO_VERSION:
WOLFSSL_MSG("get max proto version");
return wolfSSL_CTX_get_max_proto_version(ctx);
default:
WOLFSSL_MSG("CTX_ctrl cmd not implemented");
ret = WOLFSSL_FAILURE;

6
tests/api.c
View File

@ -38962,6 +38962,12 @@ static void test_wolfSSL_CTX_ctrl(void)
AssertIntEQ((int)wolfSSL_CTX_ctrl(ctx, SSL_CTRL_SET_MAX_PROTO_VERSION,
TLS1_3_VERSION, NULL), SSL_SUCCESS);
AssertIntEQ(wolfSSL_CTX_get_max_proto_version(ctx), TLS1_3_VERSION);
#ifndef WOLFSSL_NO_TLS12
AssertIntEQ((int)wolfSSL_CTX_ctrl(ctx, SSL_CTRL_SET_MAX_PROTO_VERSION,
TLS1_2_VERSION, NULL), SSL_SUCCESS);
AssertIntEQ(wolfSSL_CTX_get_max_proto_version(ctx), TLS1_2_VERSION);
#endif
#endif
/* Cleanup and Pass */
#if !defined(NO_DH) && !defined(NO_DSA)

3
wolfssl/openssl/ssl.h
View File

@ -1128,6 +1128,7 @@ wolfSSL_X509_STORE_set_verify_cb((WOLFSSL_X509_STORE *)(s), (WOLFSSL_X509_STORE_
#define SSL_set_min_proto_version wolfSSL_set_min_proto_version
#define SSL_set_max_proto_version wolfSSL_set_max_proto_version
#define SSL_CTX_get_min_proto_version wolfSSL_CTX_get_min_proto_version
#define SSL_CTX_get_max_proto_version wolfSSL_CTX_get_max_proto_version
#define SSL_get_tlsext_status_exts wolfSSL_get_tlsext_status_exts
@ -1154,6 +1155,8 @@ wolfSSL_X509_STORE_set_verify_cb((WOLFSSL_X509_STORE *)(s), (WOLFSSL_X509_STORE_
#define SSL_CTRL_GET_SERVER_TMP_KEY SSL_CTRL_GET_PEER_TMP_KEY
#define SSL_CTRL_SET_MIN_PROTO_VERSION 123
#define SSL_CTRL_SET_MAX_PROTO_VERSION 124
#define SSL_CTRL_GET_MIN_PROTO_VERSION 125
#define SSL_CTRL_GET_MAX_PROTO_VERSION 126
#define SSL_CTRL_SET_CURVES SSL_CTRL_SET_GROUPS
#define SSL_CTRL_EXTRA_CHAIN_CERT 14

3
wolfssl/ssl.h
View File

@ -1955,6 +1955,8 @@ enum {
SSL_OP_NO_COMPRESSION = 0x10000000,
WOLFSSL_OP_NO_TLSv1_3 = 0x20000000,
WOLFSSL_OP_NO_SSLv2 = 0x40000000,
WOLFSSL_OP_MAX_PROTO = 0x80000000,
WOLFSSL_OP_MIN_PROTO = 0x100000000,
SSL_OP_ALL =
(SSL_OP_MICROSOFT_SESS_ID_BUG
| SSL_OP_NETSCAPE_CHALLENGE_BUG
@ -3854,6 +3856,7 @@ WOLFSSL_API int wolfSSL_CTX_set_max_proto_version(WOLFSSL_CTX*, int);
WOLFSSL_API int wolfSSL_set_min_proto_version(WOLFSSL*, int);
WOLFSSL_API int wolfSSL_set_max_proto_version(WOLFSSL*, int);
WOLFSSL_API int wolfSSL_CTX_get_min_proto_version(WOLFSSL_CTX*);
WOLFSSL_API int wolfSSL_CTX_get_max_proto_version(WOLFSSL_CTX*);
WOLFSSL_API int wolfSSL_CTX_use_PrivateKey(WOLFSSL_CTX *ctx, WOLFSSL_EVP_PKEY *pkey);
WOLFSSL_API WOLFSSL_X509 *wolfSSL_PEM_read_bio_X509(WOLFSSL_BIO *bp, WOLFSSL_X509 **x, pem_password_cb *cb, void *u);