wolfSSL/wolfssl
1
0
Fork 1
mirror of https://github.com/wolfSSL/wolfssl.git synced 2025-07-29 18:27:29 +02:00
Code Issues Packages Projects Releases Wiki Activity

TLS 1.3 extension fixes

Browse Source 
When major version is TLS Draft then this is now ignored.
If version negotitation occurs but none matched then send an alert and
return an error.
Store the rsa_pss_pss_* signature algorithms in the bit mask.
KeyShare Entry parsing returns INVALID_PARAMETER when length is 0 and
results in a different alert being sent.
Check negotiated protocol version is not TLS 1.3 when determing whether
to parse point formats.
This commit is contained in:
Sean Parkinson
2019-07-01 12:20:37 +10:00
parent f51a8fffde
commit 1d05503d20
2 changed files with 36 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
src/tls.c
View File

@ -5711,6 +5711,7 @@ static int TLSX_SupportedVersions_Parse(WOLFSSL* ssl, byte* input,
int len;
byte major, minor;
int newMinor = 0;
int set = 0;
if (msgType == client_hello) {
/* Must contain a length and at least one version. */
@ -5735,6 +5736,9 @@ static int TLSX_SupportedVersions_Parse(WOLFSSL* ssl, byte* input,
major = SSLv3_MAJOR;
minor = TLSv1_3_MINOR;
}
#else
if (major == TLS_DRAFT_MAJOR)
continue;
#endif
if (major != pv.major)
@ -5773,6 +5777,12 @@ static int TLSX_SupportedVersions_Parse(WOLFSSL* ssl, byte* input,
}
else if (minor > ssl->options.oldMinor)
ssl->options.oldMinor = minor;
set = 1;
}
if (!set) {
SendAlert(ssl, alert_fatal, protocol_version);
return VERSION_ERROR;
}
}
#ifndef WOLFSSL_TLS13_DRAFT_18
@ -6061,6 +6071,12 @@ static int TLSX_SignatureAlgorithms_MapPss(WOLFSSL *ssl, byte* input,
for (i = 0; i < length; i += 2) {
if (input[i] == rsa_pss_sa_algo && input[i + 1] <= sha512_mac)
ssl->pssAlgo |= 1 << input[i + 1];
#ifdef WOLFSSL_TLS13
if (input[i] == rsa_pss_sa_algo && input[i + 1] >= pss_sha256 &&
input[i + 1] <= pss_sha512) {
ssl->pssAlgo |= 1 << input[i + 1];
}
#endif
}
return 0;
@ -7076,7 +7092,9 @@ static int TLSX_KeyShareEntry_Parse(WOLFSSL* ssl, byte* input, word16 length,
/* Key exchange data - public key. */
ato16(&input[offset], &keLen);
offset += OPAQUE16_LEN;
if (keLen < 1 || keLen > length - offset)
if (keLen == 0)
return INVALID_PARAMETER;
if (keLen > length - offset)
return BUFFER_ERROR;
/* Store a copy in the key share object. */
@ -10353,7 +10371,7 @@ int TLSX_Parse(WOLFSSL* ssl, byte* input, word16 length, byte msgType,
WOLFSSL_MSG("Point Formats extension received");
#ifdef WOLFSSL_TLS13
if (IsAtLeastTLSv1_3(ssl->ctx->method->version))
if (IsAtLeastTLSv1_3(ssl->version))
break;
#endif
ret = PF_PARSE(ssl, input + offset, size, isRequest);

18
wolfssl/internal.h
View File

@ -1151,8 +1151,8 @@ enum Misc {
TLSv1_1_MINOR = 2, /* TLSv1_1 minor version number */
TLSv1_2_MINOR = 3, /* TLSv1_2 minor version number */
TLSv1_3_MINOR = 4, /* TLSv1_3 minor version number */
#ifdef WOLFSSL_TLS13_DRAFT
TLS_DRAFT_MAJOR = 0x7f, /* Draft TLS major version number */
#ifdef WOLFSSL_TLS13_DRAFT
#ifdef WOLFSSL_TLS13_DRAFT_18
TLS_DRAFT_MINOR = 0x12, /* Minor version number of TLS draft */
#elif defined(WOLFSSL_TLS13_DRAFT_22)
@ -2825,6 +2825,20 @@ enum SignatureAlgorithm {
ed25519_sa_algo = 9
};
#ifdef WOLFSSL_TLS13
#define PSS_RSAE_TO_PSS_PSS(macAlgo) \
(macAlgo + (pss_sha256 - sha256_mac))
#define PSS_PSS_HASH_TO_MAC(macAlgo) \
(macAlgo - (pss_sha256 - sha256_mac))
enum SigAlgRsaPss {
pss_sha256 = 0x09,
pss_sha384 = 0x0a,
pss_sha512 = 0x0b,
};
#endif
/* Supprted ECC Curve Types */
enum EccCurves {
@ -3737,7 +3751,7 @@ struct WOLFSSL {
word16 group[WOLFSSL_MAX_GROUP_COUNT];
byte numGroups;
#endif
byte pssAlgo;
word16 pssAlgo;
#ifdef WOLFSSL_TLS13
#if !defined(WOLFSSL_TLS13_DRAFT_18) && !defined(WOLFSSL_TLS13_DRAFT_22)
word16 certHashSigAlgoSz; /* SigAlgoCert ext length in bytes */