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Commit 04ea4da

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author
Lealem Amedie
committed
Parse explicit parameters in StoreEccKey()
1 parent 73d3277 commit 04ea4da

3 files changed

Lines changed: 65 additions & 28 deletions

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‎src/ssl.c‎

Lines changed: 10 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -7627,8 +7627,16 @@ int ProcessBuffer(WOLFSSL_CTX* ctx, const unsigned char* buff,
76277627
keyType = ecc_dsa_sa_algo;
76287628
#endif
76297629
/* Determine ECC key size based on curve */
7630-
keySz = wc_ecc_get_curve_size_from_id(
7631-
wc_ecc_get_oid(cert->pkCurveOID, NULL, NULL));
7630+
#ifdef WOLFSSL_CUSTOM_CURVES
7631+
if (cert->pkCurveOID == 0 && cert->pkCurveSize != 0) {
7632+
keySz = cert->pkCurveSize * 8;
7633+
}
7634+
else
7635+
#endif
7636+
{
7637+
keySz = wc_ecc_get_curve_size_from_id(
7638+
wc_ecc_get_oid(cert->pkCurveOID, NULL, NULL));
7639+
}
76327640

76337641
if (ssl && !ssl->options.verifyNone) {
76347642
if (ssl->options.minEccKeySz < 0 ||

‎wolfcrypt/src/asn.c‎

Lines changed: 52 additions & 26 deletions
Original file line numberDiff line numberDiff line change
@@ -12027,6 +12027,11 @@ enum {
1202712027

1202812028
/* Number of items in ASN.1 template for header before ECC key in cert. */
1202912029
#define eccCertKeyASN_Length (sizeof(eccCertKeyASN) / sizeof(ASNItem))
12030+
12031+
#ifdef WOLFSSL_CUSTOM_CURVES
12032+
static int EccSpecifiedECDomainDecode(const byte* input, word32 inSz,
12033+
ecc_key* key, void* heap, int* curveSz);
12034+
#endif /* WOLFSSL_CUSTOM_CURVES */
1203012035
#endif /* WOLFSSL_ASN_TEMPLATE */
1203112036

1203212037
/* Store public ECC key in certificate object.
@@ -12140,7 +12145,18 @@ static int StoreEccKey(DecodedCert* cert, const byte* source, word32* srcIdx,
1214012145
/* Store curve OID. */
1214112146
cert->pkCurveOID = dataASN[ECCCERTKEYASN_IDX_OID].data.oid.sum;
1214212147
}
12143-
/* Ignore explicit parameters. */
12148+
else {
12149+
#ifdef WOLFSSL_CUSTOM_CURVES
12150+
/* Parse explicit parameters. */
12151+
ret = EccSpecifiedECDomainDecode(
12152+
dataASN[ECCCERTKEYASN_IDX_PARAMS].data.ref.data,
12153+
dataASN[ECCCERTKEYASN_IDX_PARAMS].data.ref.length, NULL,
12154+
NULL, &cert->pkCurveSize);
12155+
#else
12156+
/* Explicit parameters not supported in build configuration. */
12157+
ret = ASN_PARSE_E;
12158+
#endif
12159+
}
1214412160

1214512161
#ifdef WOLFSSL_MAXQ10XX_TLS
1214612162
cert->publicKeyIndex =
@@ -12149,10 +12165,13 @@ static int StoreEccKey(DecodedCert* cert, const byte* source, word32* srcIdx,
1214912165
#endif
1215012166

1215112167
#ifdef HAVE_OCSP
12152-
/* Calculate the hash of the subject public key for OCSP. */
12153-
ret = CalcHashId_ex(dataASN[ECCCERTKEYASN_IDX_SUBJPUBKEY].data.ref.data,
12154-
dataASN[ECCCERTKEYASN_IDX_SUBJPUBKEY].data.ref.length,
12155-
cert->subjectKeyHash, HashIdAlg(cert->signatureOID));
12168+
if (ret == 0) {
12169+
/* Calculate the hash of the subject public key for OCSP. */
12170+
ret = CalcHashId_ex(
12171+
dataASN[ECCCERTKEYASN_IDX_SUBJPUBKEY].data.ref.data,
12172+
dataASN[ECCCERTKEYASN_IDX_SUBJPUBKEY].data.ref.length,
12173+
cert->subjectKeyHash, HashIdAlg(cert->signatureOID));
12174+
}
1215612175
}
1215712176
if (ret == 0) {
1215812177
#endif
@@ -32271,7 +32290,7 @@ static const char ecSetCustomName[] = "Custom";
3227132290

3227232291
/* Explicit EC parameter values. */
3227332292
static int EccSpecifiedECDomainDecode(const byte* input, word32 inSz,
32274-
ecc_key* key)
32293+
ecc_key* key, void* heap, int* curveSz)
3227532294
{
3227632295
DECL_ASNGETDATA(dataASN, eccSpecifiedASN_Length);
3227732296
int ret = 0;
@@ -32283,8 +32302,8 @@ static int EccSpecifiedECDomainDecode(const byte* input, word32 inSz,
3228332302
word32 baseLen;
3228432303

3228532304
/* Allocate a new parameter set. */
32286-
curve = (ecc_set_type*)XMALLOC(sizeof(*curve), key->heap,
32287-
DYNAMIC_TYPE_ECC_BUFFER);
32305+
curve = (ecc_set_type*)XMALLOC(sizeof(*curve), heap,
32306+
DYNAMIC_TYPE_ECC_BUFFER);
3228832307
if (curve == NULL) {
3228932308
ret = MEMORY_E;
3229032309
}
@@ -32293,7 +32312,7 @@ static int EccSpecifiedECDomainDecode(const byte* input, word32 inSz,
3229332312
XMEMSET(curve, 0, sizeof(*curve));
3229432313
}
3229532314

32296-
CALLOC_ASNGETDATA(dataASN, eccSpecifiedASN_Length, ret, key->heap);
32315+
CALLOC_ASNGETDATA(dataASN, eccSpecifiedASN_Length, ret, heap);
3229732316

3229832317
if (ret == 0) {
3229932318
/* Set name to be: "Custom" */
@@ -32356,42 +32375,42 @@ static int EccSpecifiedECDomainDecode(const byte* input, word32 inSz,
3235632375
if (ret == 0) {
3235732376
/* Base X-ordinate */
3235832377
ret = DataToHexStringAlloc(base + 1, (word32)curve->size,
32359-
(char**)&curve->Gx, key->heap,
32378+
(char**)&curve->Gx, heap,
3236032379
DYNAMIC_TYPE_ECC_BUFFER);
3236132380
}
3236232381
if (ret == 0) {
3236332382
/* Base Y-ordinate */
3236432383
ret = DataToHexStringAlloc(base + 1 + curve->size, (word32)curve->size,
32365-
(char**)&curve->Gy, key->heap,
32384+
(char**)&curve->Gy, heap,
3236632385
DYNAMIC_TYPE_ECC_BUFFER);
3236732386
}
3236832387
if (ret == 0) {
3236932388
/* Prime */
3237032389
ret = DataToHexStringAlloc(
3237132390
dataASN[ECCSPECIFIEDASN_IDX_PRIME_P].data.ref.data,
3237232391
dataASN[ECCSPECIFIEDASN_IDX_PRIME_P].data.ref.length,
32373-
(char**)&curve->prime, key->heap, DYNAMIC_TYPE_ECC_BUFFER);
32392+
(char**)&curve->prime, heap, DYNAMIC_TYPE_ECC_BUFFER);
3237432393
}
3237532394
if (ret == 0) {
3237632395
/* Parameter A */
3237732396
ret = DataToHexStringAlloc(
3237832397
dataASN[ECCSPECIFIEDASN_IDX_PARAM_A].data.ref.data,
3237932398
dataASN[ECCSPECIFIEDASN_IDX_PARAM_A].data.ref.length,
32380-
(char**)&curve->Af, key->heap, DYNAMIC_TYPE_ECC_BUFFER);
32399+
(char**)&curve->Af, heap, DYNAMIC_TYPE_ECC_BUFFER);
3238132400
}
3238232401
if (ret == 0) {
3238332402
/* Parameter B */
3238432403
ret = DataToHexStringAlloc(
3238532404
dataASN[ECCSPECIFIEDASN_IDX_PARAM_B].data.ref.data,
3238632405
dataASN[ECCSPECIFIEDASN_IDX_PARAM_B].data.ref.length,
32387-
(char**)&curve->Bf, key->heap, DYNAMIC_TYPE_ECC_BUFFER);
32406+
(char**)&curve->Bf, heap, DYNAMIC_TYPE_ECC_BUFFER);
3238832407
}
3238932408
if (ret == 0) {
3239032409
/* Order of curve */
3239132410
ret = DataToHexStringAlloc(
3239232411
dataASN[ECCSPECIFIEDASN_IDX_ORDER].data.ref.data,
3239332412
dataASN[ECCSPECIFIEDASN_IDX_ORDER].data.ref.length,
32394-
(char**)&curve->order, key->heap, DYNAMIC_TYPE_ECC_BUFFER);
32413+
(char**)&curve->order, heap, DYNAMIC_TYPE_ECC_BUFFER);
3239532414
}
3239632415
#else
3239732416
if (ret == 0) {
@@ -32418,26 +32437,31 @@ static int EccSpecifiedECDomainDecode(const byte* input, word32 inSz,
3241832437
}
3241932438
#endif /* WOLFSSL_ECC_CURVE_STATIC */
3242032439

32421-
/* Store parameter set in key. */
32422-
if ((ret == 0) && (wc_ecc_set_custom_curve(key, curve) < 0)) {
32423-
ret = ASN_PARSE_E;
32440+
if (key) {
32441+
/* Store parameter set in key. */
32442+
if ((ret == 0) && (wc_ecc_set_custom_curve(key, curve) < 0)) {
32443+
ret = ASN_PARSE_E;
32444+
}
32445+
if (ret == 0) {
32446+
/* The parameter set was allocated.. */
32447+
key->deallocSet = 1;
32448+
}
3242432449
}
32425-
if (ret == 0) {
32426-
/* The parameter set was allocated.. */
32427-
key->deallocSet = 1;
32450+
32451+
if (curveSz) {
32452+
*curveSz = curve->size;
3242832453
}
3242932454

3243032455
if ((ret != 0) && (curve != NULL)) {
3243132456
/* Failed to set parameters so free parameter set. */
32432-
wc_ecc_free_curve(curve, key->heap);
32457+
wc_ecc_free_curve(curve, heap);
3243332458
}
3243432459

32435-
FREE_ASNGETDATA(dataASN, key->heap);
32460+
FREE_ASNGETDATA(dataASN, heap);
3243632461
return ret;
3243732462
}
3243832463
#endif /* WOLFSSL_CUSTOM_CURVES */
3243932464
#endif /* WOLFSSL_ASN_TEMPLATE */
32440-
3244132465
#ifdef HAVE_ECC
3244232466

3244332467
#ifdef WOLFSSL_ASN_TEMPLATE
@@ -32665,7 +32689,8 @@ int wc_EccPrivateKeyDecode(const byte* input, word32* inOutIdx, ecc_key* key,
3266532689
/* Parse explicit parameters. */
3266632690
ret = EccSpecifiedECDomainDecode(
3266732691
dataASN[ECCKEYASN_IDX_CURVEPARAMS].data.ref.data,
32668-
dataASN[ECCKEYASN_IDX_CURVEPARAMS].data.ref.length, key);
32692+
dataASN[ECCKEYASN_IDX_CURVEPARAMS].data.ref.length, key,
32693+
key->heap, NULL);
3266932694
#else
3267032695
/* Explicit parameters not supported in build configuration. */
3267132696
ret = ASN_PARSE_E;
@@ -33100,7 +33125,8 @@ int wc_EccPublicKeyDecode(const byte* input, word32* inOutIdx,
3310033125
#ifdef WOLFSSL_CUSTOM_CURVES
3310133126
/* Parse explicit parameters. */
3310233127
ret = EccSpecifiedECDomainDecode(dataASN[specIdx].data.ref.data,
33103-
dataASN[specIdx].data.ref.length, key);
33128+
dataASN[specIdx].data.ref.length, key,
33129+
key->heap, NULL);
3310433130
#else
3310533131
/* Explicit parameters not supported in build configuration. */
3310633132
ret = ASN_PARSE_E;

‎wolfssl/wolfcrypt/asn.h‎

Lines changed: 3 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1717,6 +1717,9 @@ struct DecodedCert {
17171717

17181718
#if defined(HAVE_ECC) || defined(HAVE_ED25519) || defined(HAVE_ED448)
17191719
word32 pkCurveOID; /* Public Key's curve OID */
1720+
#ifdef WOLFSSL_CUSTOM_CURVES
1721+
int pkCurveSize; /* Public Key's curve size */
1722+
#endif
17201723
#endif /* HAVE_ECC */
17211724
const byte* beforeDate;
17221725
int beforeDateLen;

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