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ASN X509 subject directory attribute: fix ASN template parsing

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Support multiple attributes.
When Country of Citizenship, pull out PRINTABLE_STRING explicitly.
Each type of attribute has a different format.
This commit is contained in:
Sean Parkinson
2022-11-03 09:24:59 +10:00
parent 502a395723
commit 336bef666a
1 changed files with 29 additions and 18 deletions
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47
wolfcrypt/src/asn.c
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@ -19302,18 +19302,14 @@ exit:
* X.509: RFC 5280, 4.2.1.8 - Subject Directory Attributes.
*/
static const ASNItem subjDirAttrASN[] = {
/* SEQ */ { 0, ASN_SEQUENCE, 1, 1, 0 },
/* SEQ */ { 1, ASN_SEQUENCE, 1, 1, 0 },
/* OID */ { 2, ASN_OBJECT_ID, 0, 0, 0 },
/* PLEN */ { 2, ASN_SET, 1, 1, 0 },
/* BIT_STR */ { 2, ASN_PRINTABLE_STRING, 0, 0, 0 }
/* PLEN */ { 2, ASN_SET, 1, 0, 0 },
};
enum {
SUBJDIRATTRASN_IDX_SEQ = 0,
SUBJDIRATTRASN_IDX_SEQ2,
SUBJDIRATTRASN_IDX_OID,
SUBJDIRATTRASN_IDX_SET,
SUBJDIRATTRASN_IDX_STRING,
};
/* Number of items in ASN.1 template for BasicContraints. */
@ -19394,28 +19390,43 @@ static int DecodeSubjDirAttr(const byte* input, int sz, DecodedCert* cert)
DECL_ASNGETDATA(dataASN, subjDirAttrASN_Length);
int ret = 0;
word32 idx = 0;
int length;
WOLFSSL_ENTER("DecodeSubjDirAttr");
CALLOC_ASNGETDATA(dataASN, subjDirAttrASN_Length, ret, cert->heap);
if (ret == 0) {
/* Strip outer SEQUENCE. */
if ((ret == 0) && (GetSequence(input, &idx, &length, sz) < 0)) {
ret = ASN_PARSE_E;
}
/* Handle each inner SEQUENCE. */
while ((ret == 0) && (idx < (word32)sz)) {
ret = GetASN_Items(subjDirAttrASN, dataASN, subjDirAttrASN_Length, 1,
input, &idx, sz);
}
/* There may be more than one countryOfCitizenship, but save the
* first one for now. */
if (dataASN[SUBJDIRATTRASN_IDX_OID].data.oid.sum == SDA_COC_OID) {
word32 cuLen;
/* There may be more than one countryOfCitizenship, but save the
* first one for now. */
if ((ret == 0) &&
(dataASN[SUBJDIRATTRASN_IDX_OID].data.oid.sum == SDA_COC_OID)) {
int cuLen;
word32 setIdx = 0;
byte* setData;
word32 setLen;
cuLen = dataASN[SUBJDIRATTRASN_IDX_STRING].data.ref.length;
if (cuLen != COUNTRY_CODE_LEN)
return ASN_PARSE_E;
XMEMCPY(cert->countryOfCitizenship,
dataASN[SUBJDIRATTRASN_IDX_STRING].data.ref.data, cuLen);
cert->countryOfCitizenship[COUNTRY_CODE_LEN] = 0;
GetASN_GetRef(&dataASN[SUBJDIRATTRASN_IDX_SET], &setData, &setLen);
if (GetASNHeader(setData, ASN_PRINTABLE_STRING, &setIdx, &cuLen,
setLen) < 0) {
ret = ASN_PARSE_E;
}
if ((ret == 0) && (cuLen != COUNTRY_CODE_LEN)) {
ret = ASN_PARSE_E;
}
if (ret == 0) {
XMEMCPY(cert->countryOfCitizenship, setData + setIdx, cuLen);
cert->countryOfCitizenship[COUNTRY_CODE_LEN] = 0;
}
}
}
FREE_ASNGETDATA(dataASN, cert->heap);
return ret;