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Merge pull request #2851 from JacobBarthelmeh/SanityChecks

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add space for null terminator and check on header pointer
This commit is contained in:
toddouska
2020-03-19 16:00:57 -07:00
committed by GitHub
parent 00630baa53 aff80ab0d3
commit f4a8430115
2 changed files with 5 additions and 8 deletions
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6
tests/api.c
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@ -5046,13 +5046,9 @@ static void test_wolfSSL_PKCS8(void)
AssertIntEQ(wolfSSL_CTX_use_PrivateKey_buffer(ctx, buffer, bytes,
WOLFSSL_FILETYPE_ASN1), WOLFSSL_SUCCESS);
#else
#ifdef OPENSSL_EXTRA
AssertIntGT((bytes = wc_KeyPemToDer(buffer, bytes, der,
(word32)sizeof(der), NULL)), 0);
#else
/* if HAVE_ECC is not defined then BEGIN EC PRIVATE KEY is not found */
AssertIntEQ((bytes = wc_KeyPemToDer(buffer, bytes, der,
(word32)sizeof(der), NULL)), ASN_NO_PEM_HEADER);
#endif
#endif /* HAVE_ECC */
wolfSSL_CTX_free(ctx);

7
wolfcrypt/src/asn.c
View File

@ -10434,8 +10434,8 @@ int PemToDer(const unsigned char* buff, long longSz, int type,
#endif
#endif
#ifdef OPENSSL_EXTRA
char beginBuf[PEM_LINE_LEN];
char endBuf[PEM_LINE_LEN];
char beginBuf[PEM_LINE_LEN + 1]; /* add 1 for null terminator */
char endBuf[PEM_LINE_LEN + 1]; /* add 1 for null terminator */
#endif
WOLFSSL_ENTER("PemToDer");
@ -10506,7 +10506,8 @@ int PemToDer(const unsigned char* buff, long longSz, int type,
XSTR_SIZEOF(BEGIN_PRIV_KEY_PREFIX)) != 0) {
headerEnd--;
}
if (XSTRNCMP(headerEnd, BEGIN_PRIV_KEY_PREFIX,
if (headerEnd <= (char*)buff ||
XSTRNCMP(headerEnd, BEGIN_PRIV_KEY_PREFIX,
XSTR_SIZEOF(BEGIN_PRIV_KEY_PREFIX)) != 0 ||
beginEnd - headerEnd > PEM_LINE_LEN) {
WOLFSSL_MSG("Couldn't find PEM header");