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Fix TSP message imprint algorithm/digest length consistency #11153

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9e08288
Fix TSP message imprint algorithm/digest length consistency
yosuke-wolfssl Aug 12, 2026
d2ffa65
Map SHA-512/224 and SHA-512/256 OIDs in wc_OidGetHash
yosuke-wolfssl Aug 12, 2026
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38 changes: 19 additions & 19 deletions doc/dox_comments/header_files/tsp.h
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Original file line number Diff line number Diff line change
Expand Up @@ -18,9 +18,8 @@
// hash the data to be time-stamped into hash

wc_TspRequest_Init(&req);
req.imprint.hashAlgOID = SHA256h;
XMEMCPY(req.imprint.hash, hash, sizeof(hash));
req.imprint.hashSz = (word32)sizeof(hash);
wc_TspRequest_SetHashType(&req, WC_HASH_TYPE_SHA256);
wc_TspRequest_SetHash(&req, hash, (word32)sizeof(hash));
req.certReq = 1;
\endcode

Expand All @@ -33,9 +32,8 @@ int wc_TspRequest_Init(TspRequest* req);
/*!
\ingroup TSP

\brief This function sets the message imprint hash algorithm and hash size
of a TimeStampReq from a hash type. After calling, fill
req->imprint.hash with the digest of the data to be time-stamped.
\brief This function sets the message imprint hash algorithm of a
TimeStampReq from a hash type. Any digest already set is discarded.

\return 0 Returned on successfully setting the hash algorithm.
\return BAD_FUNC_ARG Returned when req is NULL.
Expand All @@ -54,11 +52,12 @@ int wc_TspRequest_Init(TspRequest* req);

wc_TspRequest_Init(&req);
wc_TspRequest_SetHashType(&req, WC_HASH_TYPE_SHA256);
XMEMCPY(req.imprint.hash, hash, sizeof(hash));
wc_TspRequest_SetHash(&req, hash, (word32)sizeof(hash));
req.certReq = 1;
\endcode

\sa wc_TspRequest_Init
\sa wc_TspRequest_SetHash
\sa wc_TspRequest_GetHashType
\sa wc_TspRequest_Encode
*/
Expand Down Expand Up @@ -133,11 +132,15 @@ int wc_TspRequest_GetHash(const TspRequest* req, byte* hash, word32* hashSz);

\brief This function sets the message imprint hash of a TimeStampReq. The
hash and its length are copied into the message imprint. Set the hash
algorithm separately with wc_TspRequest_SetHashType().
algorithm first with wc_TspRequest_SetHashType() - hashSz must be the
digest size of that algorithm.

\return 0 Returned on successfully setting the hash.
\return BAD_FUNC_ARG Returned when req or hash is NULL or hashSz is 0.
\return BUFFER_E Returned when hashSz is too big for the message imprint.
\return HASH_TYPE_E Returned when the hash algorithm is not set or not
available.
\return BUFFER_E Returned when hashSz is not the algorithm's digest size
or is too big for the message imprint.

\param [in,out] req Pointer to the TspRequest structure to update.
\param [in] hash Hash of the data to be time-stamped.
Expand All @@ -151,7 +154,7 @@ int wc_TspRequest_GetHash(const TspRequest* req, byte* hash, word32* hashSz);

wc_TspRequest_Init(&req);
wc_TspRequest_SetHashType(&req, WC_HASH_TYPE_SHA256);
wc_TspRequest_SetHash(&req, hash, sizeof(hash));
wc_TspRequest_SetHash(&req, hash, (word32)sizeof(hash));
\endcode

\sa wc_TspRequest_GetHash
Expand Down Expand Up @@ -374,9 +377,8 @@ void wc_TspRequest_SetCertReq(TspRequest* req, int val);
have a leading zero byte.

\return 0 Returned on successfully encoding the request.
\return BAD_FUNC_ARG Returned when req or outSz is NULL, the message
imprint hash is not set, a field is too long for its array or the nonce
has a leading zero byte.
\return BAD_FUNC_ARG Returned when req or outSz is NULL, or a field is
unset, the wrong length or not encodable as given.
\return BUFFER_E Returned when out is not NULL and the encoding is
longer than outSz.
\return ASN_UNKNOWN_OID_E Returned when the hash algorithm is not
Expand Down Expand Up @@ -636,7 +638,8 @@ int wc_TspTstInfo_GetMsgImprint(const TspTstInfo* tstInfo, word32* hashOID,

\return 0 Returned on successfully setting the message imprint.
\return BAD_FUNC_ARG Returned when tstInfo or hash is NULL or hashSz is 0.
\return BUFFER_E Returned when hashSz is too big for the message imprint.
\return BUFFER_E Returned when hashSz is too big for the message imprint
or not the digest size of hashOID.

\param [in,out] tstInfo Pointer to the TspTstInfo structure to update.
\param [in] hashOID Hash algorithm OID sum: SHA256h, etc.
Expand Down Expand Up @@ -897,11 +900,8 @@ int wc_TspTstInfo_SetFromRequest(TspTstInfo* tstInfo, const TspRequest* req,
wc_TspTstInfo_SignWithPkcs7() which encodes and signs in one call.

\return 0 Returned on successfully encoding the TSTInfo.
\return BAD_FUNC_ARG Returned when tstInfo or outSz is NULL, a required
field is not set or empty, the hash is too long, the genTime is not a
valid GeneralizedTime, the tsa is empty, the serial number or nonce is
empty or has a leading zero byte or accuracy millis or micros is out of
range.
\return BAD_FUNC_ARG Returned when tstInfo or outSz is NULL, or a field
is unset, the wrong length or not encodable as given.
\return BUFFER_E Returned when out is not NULL and the encoding is
longer than outSz.
\return ASN_UNKNOWN_OID_E Returned when the hash algorithm is not
Expand Down
21 changes: 16 additions & 5 deletions tests/api/test_hash.c
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Original file line number Diff line number Diff line change
Expand Up @@ -780,6 +780,12 @@ int test_wc_OidGetHash(void)
#endif
#ifdef WOLFSSL_SHA512
SHA512h,
#ifndef WOLFSSL_NOSHA512_224
SHA512_224h,
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#endif
#ifndef WOLFSSL_NOSHA512_256
SHA512_256h,
#endif
#endif
#ifdef WOLFSSL_SHA3
SHA3_224h,
Expand Down Expand Up @@ -813,6 +819,15 @@ int test_wc_OidGetHash(void)
#endif
#ifndef WOLFSSL_SHA512
SHA512h,
SHA512_224h,
SHA512_256h,
#else
#ifdef WOLFSSL_NOSHA512_224
SHA512_224h,
#endif
#ifdef WOLFSSL_NOSHA512_256
SHA512_256h,
#endif
#endif
#ifndef WOLFSSL_SHA3
SHA3_224h,
Expand Down Expand Up @@ -1088,11 +1103,7 @@ int test_wc_HashFeatureCoverage(void)
{
int oid = wc_HashGetOID(supportedHash[i]);
ExpectIntGT(oid, 0);
/* wc_OidGetHash() has no case for SHA512_224h/SHA512_256h (no
* OID assigned upstream for those two truncated variants), so
* the round trip only holds for the other digests. */
if (oid > 0 && supportedHash[i] != WC_HASH_TYPE_SHA512_224 &&
supportedHash[i] != WC_HASH_TYPE_SHA512_256) {
if (oid > 0) {
enum wc_HashType rtType = wc_OidGetHash(oid);
ExpectIntEQ((int)rtType, (int)supportedHash[i]);
}
Expand Down
71 changes: 65 additions & 6 deletions tests/api/test_tsp.c
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Original file line number Diff line number Diff line change
Expand Up @@ -117,7 +117,9 @@ int test_wc_TspRequest_SetHashType(void)
#if defined(WOLFSSL_TSP) && !defined(NO_SHA256) && \
defined(WOLFSSL_TSP_REQUESTER)
TspRequest req;
byte zeros[WC_SHA256_DIGEST_SIZE];

XMEMSET(zeros, 0, sizeof(zeros));
ExpectIntEQ(wc_TspRequest_Init(&req), 0);

/* Bad argument. */
Expand All @@ -127,17 +129,25 @@ int test_wc_TspRequest_SetHashType(void)
ExpectIntEQ(wc_TspRequest_SetHashType(&req, WC_HASH_TYPE_NONE),
WC_NO_ERR_TRACE(HASH_TYPE_E));

/* SHA-256 sets the algorithm OID and the digest size. */
/* SHA-256 sets the algorithm OID - the digest is set separately. */
ExpectIntEQ(wc_TspRequest_SetHashType(&req, WC_HASH_TYPE_SHA256), 0);
ExpectIntEQ(req.imprint.hashAlgOID, SHA256h);
ExpectIntEQ(req.imprint.hashSz, WC_SHA256_DIGEST_SIZE);
ExpectIntEQ(req.imprint.hashSz, 0);

#ifdef WOLFSSL_SHA384
/* A different algorithm sets a different OID and size. */
/* A different algorithm sets a different OID. */
ExpectIntEQ(wc_TspRequest_SetHashType(&req, WC_HASH_TYPE_SHA384), 0);
ExpectIntEQ(req.imprint.hashAlgOID, SHA384h);
ExpectIntEQ(req.imprint.hashSz, WC_SHA384_DIGEST_SIZE);
ExpectIntEQ(req.imprint.hashSz, 0);
#endif

/* Setting the algorithm discards a digest already set. */
ExpectIntEQ(wc_TspRequest_SetHashType(&req, WC_HASH_TYPE_SHA256), 0);
ExpectIntEQ(wc_TspRequest_SetHash(&req, tsHashedMsg,
(word32)sizeof(tsHashedMsg)), 0);
ExpectIntEQ(wc_TspRequest_SetHashType(&req, WC_HASH_TYPE_SHA256), 0);
ExpectIntEQ(req.imprint.hashSz, 0);
ExpectBufEQ(req.imprint.hash, zeros, (int)sizeof(zeros));
#endif
return EXPECT_RESULT();
}
Expand Down Expand Up @@ -200,6 +210,14 @@ int test_wc_TspRequest_GetSetHash(void)
/* Hash too big for the message imprint. */
ExpectIntEQ(wc_TspRequest_SetHash(&req, hash, WC_TSP_MAX_HASH_SZ + 1),
WC_NO_ERR_TRACE(BUFFER_E));
/* Hash algorithm not set yet. */
ExpectIntEQ(wc_TspRequest_SetHash(&req, hash, (word32)sizeof(hash)),
WC_NO_ERR_TRACE(HASH_TYPE_E));

ExpectIntEQ(wc_TspRequest_SetHashType(&req, WC_HASH_TYPE_SHA256), 0);
/* One byte short of the algorithm's digest size. */
ExpectIntEQ(wc_TspRequest_SetHash(&req, hash, (word32)sizeof(hash) - 1),
WC_NO_ERR_TRACE(BUFFER_E));

/* Set the hash and length. */
ExpectIntEQ(wc_TspRequest_SetHash(&req, hash, (word32)sizeof(hash)), 0);
Expand Down Expand Up @@ -434,7 +452,22 @@ int test_wc_TspRequest_Encode(void)
req.imprint.hashSz = WC_TSP_MAX_HASH_SZ + 1;
ExpectIntEQ(wc_TspRequest_Encode(&req, enc, &encSz),
WC_NO_ERR_TRACE(BAD_FUNC_ARG));
req.imprint.hashSz = (word32)sizeof(tsHashedMsg);
/* Hash length that is not the algorithm's digest size. */
req.imprint.hashSz = (word32)sizeof(tsHashedMsg) - 1;
ExpectIntEQ(wc_TspRequest_Encode(&req, enc, &encSz),
WC_NO_ERR_TRACE(BAD_FUNC_ARG));
/* Algorithm set but the digest never supplied - not encoded. */
ExpectIntEQ(wc_TspRequest_Init(&req), 0);
ExpectIntEQ(wc_TspRequest_SetHashType(&req, WC_HASH_TYPE_SHA256), 0);
ExpectIntEQ(wc_TspRequest_Encode(&req, enc, &encSz),
WC_NO_ERR_TRACE(BAD_FUNC_ARG));
/* Setting the algorithm after the digest discards the digest. */
ExpectIntEQ(wc_TspRequest_SetHash(&req, tsHashedMsg,
(word32)sizeof(tsHashedMsg)), 0);
ExpectIntEQ(wc_TspRequest_SetHashType(&req, WC_HASH_TYPE_SHA256), 0);
ExpectIntEQ(wc_TspRequest_Encode(&req, enc, &encSz),
WC_NO_ERR_TRACE(BAD_FUNC_ARG));
test_tsp_set_hash(&req.imprint);
/* Policy too long. */
req.policySz = MAX_OID_SZ + 1;
ExpectIntEQ(wc_TspRequest_Encode(&req, enc, &encSz),
Expand Down Expand Up @@ -483,6 +516,19 @@ int test_wc_TspRequest_Encode(void)
sz = (word32)sizeof(enc);
ExpectIntEQ(wc_TspRequest_Encode(&req, enc, &sz), 0);
ExpectIntGT(sz, (word32)sizeof(tsMinReqDer));

#if (!defined(HAVE_FIPS) || FIPS_VERSION3_GE(7,0,0)) && \
!defined(HAVE_SELFTEST) && defined(WOLFSSL_SHA512) && \
!defined(WOLFSSL_NOSHA512_224)
/* SHA-512/224 imprint - the OID maps back to the algorithm. */
ExpectIntEQ(wc_TspRequest_Init(&req), 0);
ExpectIntEQ(wc_TspRequest_SetHashType(&req, WC_HASH_TYPE_SHA512_224), 0);
ExpectIntEQ(req.imprint.hashAlgOID, SHA512_224h);
ExpectIntEQ(wc_TspRequest_SetHash(&req, tsHashedMsg,
WC_SHA512_224_DIGEST_SIZE), 0);
sz = (word32)sizeof(enc);
ExpectIntEQ(wc_TspRequest_Encode(&req, enc, &sz), 0);
#endif
#endif
return EXPECT_RESULT();
}
Expand Down Expand Up @@ -867,7 +913,8 @@ int test_wc_TspTstInfo_Setters(void)
static const byte policy[] = {
0x2b, 0x06, 0x01, 0x04, 0x01, 0x87, 0x67, 0x01
};
static const byte hash[] = { 0xde, 0xad, 0xbe, 0xef };
/* SHA-256 sized hash - the length must match the algorithm. */
static const byte hash[32] = { 0xde, 0xad, 0xbe, 0xef };
static const byte genTime[] = "20260610120000Z";
static const byte nonce[] = { 0x12, 0x34 };
/* Name of TSA: dNSName GeneralName. */
Expand Down Expand Up @@ -906,6 +953,14 @@ int test_wc_TspTstInfo_Setters(void)
WC_NO_ERR_TRACE(BAD_FUNC_ARG));
ExpectIntEQ(wc_TspTstInfo_SetMsgImprint(&tst, SHA256h, bigHash,
(word32)sizeof(bigHash)), WC_NO_ERR_TRACE(BUFFER_E));
#ifndef NO_SHA256
/* One byte short of the digest size of the algorithm. */
ExpectIntEQ(wc_TspTstInfo_SetMsgImprint(&tst, SHA256h, hash,
(word32)sizeof(hash) - 1), WC_NO_ERR_TRACE(BUFFER_E));
#endif
/* An unknown algorithm has no digest size - any length accepted. */
ExpectIntEQ(wc_TspTstInfo_SetMsgImprint(&tst, 1, hash,
(word32)sizeof(hash) - 1), 0);
ExpectIntEQ(wc_TspTstInfo_SetMsgImprint(&tst, SHA256h, hash,
(word32)sizeof(hash)), 0);
ExpectIntEQ(wc_TspTstInfo_GetMsgImprint(&tst, &hashOID, &out, &outSz), 0);
Expand Down Expand Up @@ -1033,6 +1088,10 @@ int test_wc_TspTstInfo_Encode(void)
WC_NO_ERR_TRACE(BAD_FUNC_ARG));
/* Hash too long. */
tst.imprint.hashSz = WC_TSP_MAX_HASH_SZ + 1;
ExpectIntEQ(wc_TspTstInfo_Encode(&tst, enc, &encSz),
WC_NO_ERR_TRACE(BAD_FUNC_ARG));
/* Hash length that is not the algorithm's digest size. */
tst.imprint.hashSz = (word32)sizeof(tsHashedMsg) - 1;
ExpectIntEQ(wc_TspTstInfo_Encode(&tst, enc, &encSz),
WC_NO_ERR_TRACE(BAD_FUNC_ARG));
tst.imprint.hashSz = (word32)sizeof(tsHashedMsg);
Expand Down
38 changes: 26 additions & 12 deletions wolfcrypt/src/asn_tsp.c
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Expand Up @@ -112,9 +112,8 @@ enum {
* @param [in, out] outSz On in, length of buffer in bytes.
* On out, length of encoding in bytes.
* @return 0 on success.
* @return BAD_FUNC_ARG when req or outSz is NULL, the message imprint hash
* is not set, a field is too long for its array or the nonce has a
* leading zero byte.
* @return BAD_FUNC_ARG when req or outSz is NULL, or a field is unset, the
* wrong length or not encodable as given.
* @return BUFFER_E when out is not NULL and encoding is longer than outSz.
* @return ASN_UNKNOWN_OID_E when the hash algorithm is not recognized.
* @return MEMORY_E on dynamic memory allocation failure.
Expand All @@ -124,17 +123,25 @@ int wc_TspRequest_Encode(const TspRequest* req, byte* out, word32* outSz)
DECL_ASNSETDATA(dataASN, tspReqASN_Length);
int ret = 0;
word32 sz = 0;
int digestSz = 0;

WOLFSSL_ENTER("wc_TspRequest_Encode");

/* Validate parameters. */
if ((req == NULL) || (outSz == NULL)) {
ret = BAD_FUNC_ARG;
}
/* The message imprint is the only required field. */
if ((ret == 0) && ((req->imprint.hashSz == 0) ||
(req->imprint.hashSz > sizeof(req->imprint.hash)))) {
ret = BAD_FUNC_ARG;
/* The message imprint is the only required field. Its length is checked
* against the hash algorithm when the algorithm is known and available. */
if (ret == 0) {
digestSz = wc_HashGetDigestSize(
wc_OidGetHash((int)req->imprint.hashAlgOID));
if ((req->imprint.hashSz == 0) ||
(req->imprint.hashSz > sizeof(req->imprint.hash)) ||
((digestSz > 0) &&
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(req->imprint.hashSz != (word32)digestSz))) {
ret = BAD_FUNC_ARG;
}
}
/* Policy, when set, must fit. */
if ((ret == 0) && (req->policySz > sizeof(req->policy))) {
Expand Down Expand Up @@ -447,11 +454,8 @@ enum {
* @param [in, out] outSz On in, length of buffer in bytes.
* On out, length of encoding in bytes.
* @return 0 on success.
* @return BAD_FUNC_ARG when tstInfo or outSz is NULL, a required field of
* tstInfo is not set or empty, the hash is too long, the genTime
* is not a valid GeneralizedTime, the tsa is empty, the serial
* number or nonce is empty or has a leading zero byte or accuracy
* millis or micros is out of range.
* @return BAD_FUNC_ARG when tstInfo or outSz is NULL, or a field is unset,
* the wrong length or not encodable as given.
* @return BUFFER_E when out is not NULL and encoding is longer than outSz.
* @return ASN_UNKNOWN_OID_E when the hash algorithm is not recognized.
* @return ASN_TIME_E when getting the current time failed.
Expand All @@ -462,6 +466,7 @@ int wc_TspTstInfo_Encode(const TspTstInfo* tstInfo, byte* out, word32* outSz)
DECL_ASNSETDATA(dataASN, tspTstInfoASN_Length);
int ret = 0;
word32 sz = 0;
int digestSz = 0;
#if !defined(NO_ASN_TIME) && !defined(USER_TIME) && !defined(TIME_OVERRIDES)
byte timeBuf[ASN_GENERALIZED_TIME_SIZE];
#endif
Expand All @@ -480,6 +485,15 @@ int wc_TspTstInfo_Encode(const TspTstInfo* tstInfo, byte* out, word32* outSz)
(tstInfo->serial == NULL))) {
ret = BAD_FUNC_ARG;
}
/* The imprint length must match the hash algorithm when the algorithm is
* known and available. */
if (ret == 0) {
digestSz = wc_HashGetDigestSize(
wc_OidGetHash((int)tstInfo->imprint.hashAlgOID));
if ((digestSz > 0) && (tstInfo->imprint.hashSz != (word32)digestSz)) {
ret = BAD_FUNC_ARG;
}
}
/* genTime, when set, must be a valid GeneralizedTime of RFC 3161. */
if ((ret == 0) && (tstInfo->genTime != NULL) &&
(TspCheckGenTimeSyntax(tstInfo->genTime, tstInfo->genTimeSz)
Expand Down
14 changes: 14 additions & 0 deletions wolfcrypt/src/hash.c
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Expand Up @@ -325,6 +325,20 @@ enum wc_HashType wc_OidGetHash(int oid)
hash_type = WC_ERR_TRACE(WC_HASH_TYPE_NONE);
#endif
break;
case SHA512_224h:
#if defined(WOLFSSL_SHA512) && !defined(WOLFSSL_NOSHA512_224)
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🔵 [Low] New wc_OidGetHash() SHA-512/224 and SHA-512/256 cases use guards that do not match wc_HashGetDigestSize() · Preprocessor-conditional security bypass

wc_HashGetDigestSize() additionally requires (!defined(HAVE_FIPS) || FIPS_VERSION3_GE(7,0,0)) && !defined(HAVE_SELFTEST) for these two types (hash.c:463-479). On FIPS builds with HAVE_FIPS_VERSION 3-5 the new cases return a type whose digest size is HASH_TYPE_E, so the PR's imprint-length checks, gated on digestSz > 0, stay disabled for SHA512_224h/SHA512_256h imprints and a TSA still signs a TSTInfo whose imprint length contradicts its algorithm ID.

Fix: Add (!defined(HAVE_FIPS) || FIPS_VERSION3_GE(7,0,0)) && !defined(HAVE_SELFTEST) to both new cases so the mapping matches hash-operation availability.

@wolfSSL-Fenrir-bot wolfSSL-Fenrir-bot Aug 19, 2026

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🔵 [Low] New wc_OidGetHash SHA-512/224 and SHA-512/256 cases omit the FIPS/SELFTEST guard used by the rest of hash.c · Copy-paste errors

The two new cases guard only on WOLFSSL_SHA512/WOLFSSL_NOSHA512_*, while wc_HashGetDigestSize, wc_HashGetBlockSize, wc_HashInit_ex, wc_HashUpdate, wc_HashFinal and wc_Hash_ex all add (!HAVE_FIPS || FIPS_VERSION3_GE(7,0,0)) && !HAVE_SELFTEST. In FIPS<7/selftest builds these OIDs now report a supported hash type that every hash operation then rejects with HASH_TYPE_E, so WC_HASH_TYPE_NONE gates (e.g. wc_PKCS12_create_mac at pkcs12.c:591, wc_TspRequest_GetHashType) stop catching the unavailable algorithm.

Fix: Add (!defined(HAVE_FIPS) || FIPS_VERSION3_GE(7,0,0)) && !defined(HAVE_SELFTEST) to both new case guards, and mirror it in the corresponding test lists.

hash_type = WC_HASH_TYPE_SHA512_224;
#else
hash_type = WC_ERR_TRACE(WC_HASH_TYPE_NONE);
#endif
break;
case SHA512_256h:
#if defined(WOLFSSL_SHA512) && !defined(WOLFSSL_NOSHA512_256)
hash_type = WC_HASH_TYPE_SHA512_256;
#else
hash_type = WC_ERR_TRACE(WC_HASH_TYPE_NONE);
#endif
break;
case SHA3_224h:
#ifdef WOLFSSL_SHA3
hash_type = WC_HASH_TYPE_SHA3_224;
Expand Down
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