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update to ECC key parsing custom curves for Windows

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This commit is contained in:
Jacob Barthelmeh
2020-01-08 14:45:59 -07:00
parent d257003341
commit 41f134ae31
2 changed files with 73 additions and 4 deletions
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75
wolfcrypt/src/asn.c
View File

@ -14373,9 +14373,25 @@ int wc_EccPublicKeyDecode(const byte* input, word32* inOutIdx,
ret = ASN_PARSE_E;
}
if (ret == 0) {
char* p = NULL;
SkipObjectId(input, inOutIdx, inSz);
ret = ASNToHexString(input, inOutIdx, (char**)&curve->prime, inSz,
ret = ASNToHexString(input, inOutIdx, &p, inSz,
key->heap, DYNAMIC_TYPE_ECC_BUFFER);
#ifndef USE_WINDOWS_API
curve->prime = p;
#else
if (ret == 0 && p != NULL) {
length = XSTRLEN(p) + 1;
if (length > MAX_ECC_STRING) {
WOLFSSL_MSG("Prime too large for buffer");
ret = BUFFER_E;
}
else {
XSTRNCPY(curve->prime, p, length);
}
}
XFREE(p, key->heap, DYNAMIC_TYPE_ECC_BUFFER);
#endif
}
if (ret == 0) {
curve->size = (int)XSTRLEN(curve->prime) / 2;
@ -14384,12 +14400,45 @@ int wc_EccPublicKeyDecode(const byte* input, word32* inOutIdx,
ret = ASN_PARSE_E;
}
if (ret == 0) {
ret = ASNToHexString(input, inOutIdx, (char**)&curve->Af, inSz,
char* af = NULL;
ret = ASNToHexString(input, inOutIdx, &af, inSz,
key->heap, DYNAMIC_TYPE_ECC_BUFFER);
#ifndef USE_WINDOWS_API
curve->Af = af;
#else
if (ret == 0 && af != NULL) {
length = XSTRLEN(af) + 1;
if (length > MAX_ECC_STRING) {
WOLFSSL_MSG("Af too large for buffer");
ret = BUFFER_E;
}
else {
XSTRNCPY(curve->Af, af, length);
}
}
XFREE(af, key->heap, DYNAMIC_TYPE_ECC_BUFFER);
#endif
}
if (ret == 0) {
ret = ASNToHexString(input, inOutIdx, (char**)&curve->Bf, inSz,
char* bf = NULL;
ret = ASNToHexString(input, inOutIdx, &bf, inSz,
key->heap, DYNAMIC_TYPE_ECC_BUFFER);
#ifndef USE_WINDOWS_API
curve->Bf = bf;
#else
if (ret == 0 && bf != NULL) {
length = XSTRLEN(bf) + 1;
if (length > MAX_ECC_STRING) {
WOLFSSL_MSG("Bf too large for buffer");
ret = BUFFER_E;
}
else {
XSTRNCPY(curve->Bf, bf, length);
}
}
XFREE(bf, key->heap, DYNAMIC_TYPE_ECC_BUFFER);
#endif
}
if (ret == 0) {
localIdx = *inOutIdx;
@ -14430,14 +14479,32 @@ int wc_EccPublicKeyDecode(const byte* input, word32* inOutIdx,
#endif
}
if (ret == 0) {
char* o = NULL;
XMEMCPY((char*)curve->Gx, point + 2, curve->size * 2);
XMEMCPY((char*)curve->Gy, point + curve->size * 2 + 2,
curve->size * 2);
((char*)curve->Gx)[curve->size * 2] = '\0';
((char*)curve->Gy)[curve->size * 2] = '\0';
XFREE(point, key->heap, DYNAMIC_TYPE_ECC_BUFFER);
ret = ASNToHexString(input, inOutIdx, (char**)&curve->order, inSz,
ret = ASNToHexString(input, inOutIdx, &o, inSz,
key->heap, DYNAMIC_TYPE_ECC_BUFFER);
#ifndef USE_WINDOWS_API
curve->order = o;
#else
if (ret == 0 && o != NULL) {
length = XSTRLEN(o) + 1;
if (length > MAX_ECC_STRING) {
WOLFSSL_MSG("Order too large for buffer");
ret = BUFFER_E;
}
else {
XSTRNCPY(curve->order, o, length);
}
}
XFREE(o, key->heap, DYNAMIC_TYPE_ECC_BUFFER);
#endif
}
if (ret == 0) {
curve->cofactor = GetInteger7Bit(input, inOutIdx, inSz);

2
wolfcrypt/src/ecc.c
View File

@ -5127,6 +5127,7 @@ int wc_ecc_sign_set_k(const byte* k, word32 klen, ecc_key* key)
#ifdef WOLFSSL_CUSTOM_CURVES
void wc_ecc_free_curve(const ecc_set_type* curve, void* heap)
{
#ifndef USE_WINDOWS_API
if (curve->prime != NULL)
XFREE((void*)curve->prime, heap, DYNAMIC_TYPE_ECC_BUFFER);
if (curve->Af != NULL)
@ -5139,6 +5140,7 @@ void wc_ecc_free_curve(const ecc_set_type* curve, void* heap)
XFREE((void*)curve->Gx, heap, DYNAMIC_TYPE_ECC_BUFFER);
if (curve->Gy != NULL)
XFREE((void*)curve->Gy, heap, DYNAMIC_TYPE_ECC_BUFFER);
#endif
XFREE((void*)curve, heap, DYNAMIC_TYPE_ECC_BUFFER);