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Remove do/while(0) loop in wc_PKCS7_DecodeEncryptedKeyPackage(); use if-else if chain

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Josh Holtrop
2025-07-10 15:25:57 -04:00
parent 6d51b73626
commit f776c95e54
1 changed files with 38 additions and 50 deletions
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22
wolfcrypt/src/pkcs7.c
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@@ -14888,41 +14888,30 @@ WOLFSSL_API int wc_PKCS7_DecodeEncryptedKeyPackage(wc_PKCS7 * pkcs7,
word32 contentType = 0; word32 contentType = 0;
int length = 0; int length = 0;
do {
if (pkiMsg == NULL) { if (pkiMsg == NULL) {
ret = BAD_FUNC_ARG; ret = BAD_FUNC_ARG;
break;
} }
/* Expect a SEQUENCE header to start the EncryptedKeyPackage /* Expect a SEQUENCE header to start the EncryptedKeyPackage
* ContentInfo. */ * ContentInfo. */
if (GetSequence_ex(pkiMsg, &pkiIndex, &length, pkiMsgSz, 1) < 0) { else if (GetSequence_ex(pkiMsg, &pkiIndex, &length, pkiMsgSz, 1) < 0) {
ret = ASN_PARSE_E; ret = ASN_PARSE_E;
break;
} }
/* Validate the EncryptedKeyPackage OBJECT IDENTIFIER. */ /* Validate the EncryptedKeyPackage OBJECT IDENTIFIER. */
if (wc_GetContentType(pkiMsg, &pkiIndex, &contentType, pkiMsgSz) < 0) { else if (wc_GetContentType(pkiMsg, &pkiIndex, &contentType, pkiMsgSz) < 0) {
ret = ASN_PARSE_E; ret = ASN_PARSE_E;
break;
} }
else if (contentType != ENCRYPTED_KEY_PACKAGE) {
if (contentType != ENCRYPTED_KEY_PACKAGE) {
WOLFSSL_MSG("PKCS#7 input not of type EncryptedKeyPackage"); WOLFSSL_MSG("PKCS#7 input not of type EncryptedKeyPackage");
ret = PKCS7_OID_E; ret = PKCS7_OID_E;
break;
} }
/* Expect content [0] tag */ /* Expect content [0] tag */
if (GetASNHeader(pkiMsg, ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED, else if (GetASNHeader(pkiMsg, ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED,
&pkiIndex, &length, pkiMsgSz) < 0) { &pkiIndex, &length, pkiMsgSz) < 0) {
ret = ASN_PARSE_E; ret = ASN_PARSE_E;
break;
} }
/* Check for an EncryptedKeyPackage explicit CHOICE [0] tag, indicating /* Check for an EncryptedKeyPackage explicit CHOICE [0] tag, indicating
* an EnvelopedData subtype. */ * an EnvelopedData subtype. */
if (GetASNHeader(pkiMsg, ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED, else if (GetASNHeader(pkiMsg, ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED,
&pkiIndex, &length, pkiMsgSz) >= 0) { &pkiIndex, &length, pkiMsgSz) >= 0) {
/* An explicit CHOICE [0] tag was found. pkiIndex now should point /* An explicit CHOICE [0] tag was found. pkiIndex now should point
* to the EnvelopedData ContentInfo object within the * to the EnvelopedData ContentInfo object within the
@@ -14940,7 +14929,6 @@ WOLFSSL_API int wc_PKCS7_DecodeEncryptedKeyPackage(wc_PKCS7 * pkcs7,
ret = ASN_PARSE_E; ret = ASN_PARSE_E;
#endif #endif
} }
} while(0);
return ret; return ret;
} }