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AES reject-no-key guard and RSA-PSS hash-binding test (F-6151, F-6157) #10762

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8c60e8b
AES: reject mode operations when no key has been set (F-6151)
julek-wolfssl Jun 23, 2026
7f3fb69
RSA-PSS: test signature-to-message hash binding (F-6157)
julek-wolfssl Jun 23, 2026
8f6f7d4
AES: track key-set state with a dedicated flag (F-6151)
julek-wolfssl Jun 23, 2026
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96 changes: 95 additions & 1 deletion wolfcrypt/src/aes.c
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Original file line number Diff line number Diff line change
Expand Up @@ -4871,7 +4871,10 @@ static WARN_UNUSED_RESULT int wc_AesDecrypt(Aes* aes, const byte* inBlock,
int wc_AesSetKey(Aes* aes, const byte* userKey, word32 keylen,
const byte* iv, int dir)
{
return wc_Psoc6_Aes_SetKey(aes, userKey, keylen, iv, dir);
int ret = wc_Psoc6_Aes_SetKey(aes, userKey, keylen, iv, dir);
if (ret == 0 && aes != NULL)
aes->keySet = 1;
return ret;
}

#if defined(WOLFSSL_AES_DIRECT)
Expand Down Expand Up @@ -5188,6 +5191,7 @@ static void AesSetKey_C(Aes* aes, const byte* key, word32 keySz, int dir)
if (ret == 0) {
/* Callback succeeded - SE owns the key */
aes->keylen = (int)keylen;
aes->keySet = 1;
if (iv != NULL)
XMEMCPY(aes->reg, iv, WC_AES_BLOCK_SIZE);
else
Expand Down Expand Up @@ -5304,6 +5308,7 @@ static void AesSetKey_C(Aes* aes, const byte* key, word32 keySz, int dir)
* reads it as the source of truth for the configured key size. */
aes->keylen = (int)keylen;
aes->rounds = (keylen / 4) + 6;
aes->keySet = 1;
#if defined(WOLFSSL_AES_COUNTER) || defined(WOLFSSL_AES_CFB) || \
defined(WOLFSSL_AES_OFB) || defined(WOLFSSL_AES_XTS) || \
defined(WOLFSSL_AES_CTS)
Expand Down Expand Up @@ -5333,6 +5338,7 @@ static void AesSetKey_C(Aes* aes, const byte* key, word32 keySz, int dir)

aes->keylen = (int)keylen;
aes->rounds = (keylen/4) + 6;
aes->keySet = 1;
ret = wc_AesSetIV(aes, iv);
if (ret != 0)
return ret;
Expand Down Expand Up @@ -6699,12 +6705,20 @@ int wc_AesSetIV(Aes* aes, const byte* iv)

int wc_AesCbcEncrypt(Aes* aes, byte* out, const byte* in, word32 sz)
{
if (aes == NULL || aes->keySet == 0) {
WOLFSSL_MSG("AES key not set");
return BAD_FUNC_ARG;
}
return wc_Psoc6_Aes_CbcEncrypt(aes, out, in, sz);
}

#if defined(HAVE_AES_DECRYPT)
int wc_AesCbcDecrypt(Aes* aes, byte* out, const byte* in, word32 sz)
{
if (aes == NULL || aes->keySet == 0) {
WOLFSSL_MSG("AES key not set");
return BAD_FUNC_ARG;
}
return wc_Psoc6_Aes_CbcDecrypt(aes, out, in, sz);
}
#endif /* HAVE_AES_DECRYPT */
Expand Down Expand Up @@ -6760,6 +6774,13 @@ int wc_AesCbcEncrypt(Aes* aes, byte* out, const byte* in, word32 sz)
/* fall-through when unavailable */
}
#endif

/* Software/HW key schedule required from here on. */
if (aes->keySet == 0) {
WOLFSSL_MSG("AES key not set");
return BAD_FUNC_ARG;
}
Comment thread
julek-wolfssl marked this conversation as resolved.
Comment on lines +6778 to +6782

#if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_AES)
/* if async and byte count above threshold */
if (aes->asyncDev.marker == WOLFSSL_ASYNC_MARKER_AES &&
Expand Down Expand Up @@ -6970,6 +6991,13 @@ int wc_AesCbcEncrypt(Aes* aes, byte* out, const byte* in, word32 sz)
/* fall-through when unavailable */
}
#endif

/* Software/HW key schedule required from here on. */
if (aes->keySet == 0) {
WOLFSSL_MSG("AES key not set");
return BAD_FUNC_ARG;
}

#if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_AES)
/* if async and byte count above threshold */
if (aes->asyncDev.marker == WOLFSSL_ASYNC_MARKER_AES &&
Expand Down Expand Up @@ -7425,6 +7453,12 @@ int wc_AesCbcEncrypt(Aes* aes, byte* out, const byte* in, word32 sz)
}
#endif

/* Software/HW key schedule required from here on. */
if (aes->keySet == 0) {
WOLFSSL_MSG("AES key not set");
return BAD_FUNC_ARG;
}

/* consume any unused bytes left in aes->tmp */
processed = min(aes->left, sz);
xorbufout(out, in, (byte*)aes->tmp + WC_AES_BLOCK_SIZE - aes->left,
Expand Down Expand Up @@ -10423,6 +10457,12 @@ int wc_AesGcmEncrypt(Aes* aes, byte* out, const byte* in, word32 sz,
}
#endif

/* Software/HW key schedule (and hash subkey H) required from here on. */
if (aes->keySet == 0) {
WOLFSSL_MSG("AES key not set");
return BAD_FUNC_ARG;
}

#if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_AES)
/* if async and byte count above threshold */
/* only 12-byte IV is supported in HW */
Expand Down Expand Up @@ -11173,6 +11213,12 @@ int wc_AesGcmDecrypt(Aes* aes, byte* out, const byte* in, word32 sz,
}
#endif

/* Software/HW key schedule (and hash subkey H) required from here on. */
if (aes->keySet == 0) {
WOLFSSL_MSG("AES key not set");
return BAD_FUNC_ARG;
}

#if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_AES)
/* if async and byte count above threshold */
/* only 12-byte IV is supported in HW */
Expand Down Expand Up @@ -14449,6 +14495,10 @@ int wc_AesEcbEncrypt(Aes* aes, byte* out, const byte* in, word32 sz)
{
if ((in == NULL) || (out == NULL) || (aes == NULL))
return BAD_FUNC_ARG;
if (aes->keySet == 0) {
WOLFSSL_MSG("AES key not set");
return BAD_FUNC_ARG;
}

return wc_Psoc6_Aes_EcbEncrypt(aes, out, in, sz);
}
Expand All @@ -14460,6 +14510,10 @@ int wc_AesEcbDecrypt(Aes* aes, byte* out, const byte* in, word32 sz)
{
if ((in == NULL) || (out == NULL) || (aes == NULL))
return BAD_FUNC_ARG;
if (aes->keySet == 0) {
WOLFSSL_MSG("AES key not set");
return BAD_FUNC_ARG;
}

return wc_Psoc6_Aes_EcbDecrypt(aes, out, in, sz);
}
Expand Down Expand Up @@ -14497,6 +14551,12 @@ static WARN_UNUSED_RESULT int _AesEcbEncrypt(
return DCPAesEcbEncrypt(aes, out, in, sz);
#endif

/* Software key schedule required from here on. */
if (aes->keySet == 0) {
WOLFSSL_MSG("AES key not set");
return BAD_FUNC_ARG;
}

VECTOR_REGISTERS_PUSH;

#if !defined(__aarch64__) && defined(WOLFSSL_ARMASM)
Expand Down Expand Up @@ -14592,6 +14652,12 @@ static WARN_UNUSED_RESULT int _AesEcbDecrypt(
return DCPAesEcbDecrypt(aes, out, in, sz);
#endif

/* Software key schedule required from here on. */
if (aes->keySet == 0) {
WOLFSSL_MSG("AES key not set");
return BAD_FUNC_ARG;
}

VECTOR_REGISTERS_PUSH;

#if !defined(__aarch64__) && defined(WOLFSSL_ARMASM)
Expand Down Expand Up @@ -14694,12 +14760,20 @@ int wc_AesEcbDecrypt(Aes* aes, byte* out, const byte* in, word32 sz)

int wc_AesCfbEncrypt(Aes* aes, byte* out, const byte* in, word32 sz)
{
if (aes == NULL || aes->keySet == 0) {
WOLFSSL_MSG("AES key not set");
return BAD_FUNC_ARG;
}
return wc_Psoc6_Aes_CfbEncrypt(aes, out, in, sz);
}

#ifdef HAVE_AES_DECRYPT
int wc_AesCfbDecrypt(Aes* aes, byte* out, const byte* in, word32 sz)
{
if (aes == NULL || aes->keySet == 0) {
WOLFSSL_MSG("AES key not set");
return BAD_FUNC_ARG;
}
return wc_Psoc6_Aes_CfbDecrypt(aes, out, in, sz);
}
#endif /* HAVE_AES_DECRYPT */
Expand Down Expand Up @@ -14732,6 +14806,10 @@ static WARN_UNUSED_RESULT int AesCfbEncrypt_C(Aes* aes, byte* out,
if (sz == 0) {
return 0;
}
if (aes->keySet == 0) {
WOLFSSL_MSG("AES key not set");
return BAD_FUNC_ARG;
}

if (aes->left > 0) {
/* consume any unused bytes left in aes->tmp */
Expand Down Expand Up @@ -14807,6 +14885,10 @@ static WARN_UNUSED_RESULT int AesCfbDecrypt_C(Aes* aes, byte* out,
if (sz == 0) {
return 0;
}
if (aes->keySet == 0) {
WOLFSSL_MSG("AES key not set");
return BAD_FUNC_ARG;
}

if (aes->left > 0) {
/* consume any unused bytes left in aes->tmp */
Expand Down Expand Up @@ -14951,6 +15033,10 @@ static WARN_UNUSED_RESULT int wc_AesFeedbackCFB8(
if (sz == 0) {
return 0;
}
if (aes->keySet == 0) {
WOLFSSL_MSG("AES key not set");
return BAD_FUNC_ARG;
}

VECTOR_REGISTERS_PUSH;

Expand Down Expand Up @@ -15011,6 +15097,10 @@ static WARN_UNUSED_RESULT int wc_AesFeedbackCFB1(
if (sz == 0) {
return 0;
}
if (aes->keySet == 0) {
WOLFSSL_MSG("AES key not set");
return BAD_FUNC_ARG;
}

VECTOR_REGISTERS_PUSH;

Expand Down Expand Up @@ -15169,6 +15259,10 @@ static WARN_UNUSED_RESULT int AesOfbCrypt_C(Aes* aes, byte* out, const byte* in,
if (sz == 0) {
return 0;
}
if (aes->keySet == 0) {
WOLFSSL_MSG("AES key not set");
return BAD_FUNC_ARG;
}

if (aes->left > 0) {
/* consume any unused bytes left in aes->tmp */
Expand Down
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