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Further improvement to the null termination and newline logic in `wc_DerToPemEx`.

This commit is contained in:
David Garske 2018-03-19 22:58:18 -07:00
parent 87c70e76a9
commit 764aec071c
1 changed files with 13 additions and 34 deletions
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47
wolfcrypt/src/asn.c
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@ -7351,76 +7351,51 @@ int wc_DerToPemEx(const byte* der, word32 derSz, byte* output, word32 outSz,
}
#endif
/* null term and leave room for \n */
header[--headerLen] = '\0';
footer[--footerLen] = '\0';
/* null term and leave room for newline */
header[--headerLen] = '\0'; header[--headerLen] = '\0';
footer[--footerLen] = '\0'; footer[--footerLen] = '\0';
/* build header and footer based on type */
if (type == CERT_TYPE) {
XSTRNCPY(header, BEGIN_CERT, headerLen);
XSTRNCAT(header, "\n", 1);
XSTRNCPY(footer, END_CERT, footerLen);
XSTRNCAT(footer, "\n", 1);
}
else if (type == PRIVATEKEY_TYPE) {
XSTRNCPY(header, BEGIN_RSA_PRIV, headerLen);
XSTRNCAT(header, "\n", 1);
XSTRNCPY(footer, END_RSA_PRIV, footerLen);
XSTRNCAT(footer, "\n", 1);
}
else if (type == PUBLICKEY_TYPE) {
XSTRNCPY(header, BEGIN_PUB_KEY, headerLen);
XSTRNCAT(header, "\n", 1);
XSTRNCPY(footer, END_PUB_KEY, footerLen);
XSTRNCAT(footer, "\n", 1);
}
#ifndef NO_DSA
else if (type == DSA_PRIVATEKEY_TYPE) {
XSTRNCPY(header, BEGIN_DSA_PRIV, headerLen);
XSTRNCAT(header, "\n", 1);
XSTRNCPY(footer, END_DSA_PRIV, footerLen);
XSTRNCAT(footer, "\n", 1);
}
#endif
#ifdef HAVE_ECC
else if (type == ECC_PRIVATEKEY_TYPE) {
XSTRNCPY(header, BEGIN_EC_PRIV, headerLen);
XSTRNCAT(header, "\n", 1);
XSTRNCPY(footer, END_EC_PRIV, footerLen);
XSTRNCAT(footer, "\n", 1);
}
#endif
#ifdef HAVE_ED25519
else if (type == EDDSA_PRIVATEKEY_TYPE) {
XSTRNCPY(header, BEGIN_EDDSA_PRIV, headerLen);
XSTRNCAT(header, "\n", 1);
XSTRNCPY(footer, END_EDDSA_PRIV, footerLen);
XSTRNCAT(footer, "\n", 1);
}
#endif
#ifdef WOLFSSL_CERT_REQ
else if (type == CERTREQ_TYPE)
{
else if (type == CERTREQ_TYPE) {
XSTRNCPY(header, BEGIN_CERT_REQ, headerLen);
XSTRNCAT(header, "\n", 1);
XSTRNCPY(footer, END_CERT_REQ, footerLen);
XSTRNCAT(footer, "\n", 1);
}
#endif
#ifdef HAVE_CRL
else if (type == CRL_TYPE)
{
else if (type == CRL_TYPE) {
XSTRNCPY(header, BEGIN_X509_CRL, headerLen);
XSTRNCAT(header, "\n", 1);
XSTRNCPY(footer, END_X509_CRL, footerLen);
XSTRNCAT(footer, "\n", 1);
}
#endif
else {
@ -7431,16 +7406,20 @@ int wc_DerToPemEx(const byte* der, word32 derSz, byte* output, word32 outSz,
return BAD_FUNC_ARG;
}
/* add new line to end */
XSTRNCAT(header, "\n", 2);
XSTRNCAT(footer, "\n", 2);
/* extra header information for encrypted key */
if (cipher_info != NULL) {
size_t cipherInfoStrLen = XSTRLEN((char*)cipher_info);
if (cipherInfoStrLen > HEADER_ENCRYPTED_KEY_SIZE - (23+10+2))
cipherInfoStrLen = HEADER_ENCRYPTED_KEY_SIZE - (23+10+2);
if (cipherInfoStrLen > HEADER_ENCRYPTED_KEY_SIZE - (23+10+3))
cipherInfoStrLen = HEADER_ENCRYPTED_KEY_SIZE - (23+10+3);
XSTRNCAT(header, "Proc-Type: 4,ENCRYPTED\n", 23);
XSTRNCAT(header, "DEK-Info: ", 10);
XSTRNCAT(header, (char*)cipher_info, cipherInfoStrLen);
XSTRNCAT(header, "\n\n", 2);
XSTRNCAT(header, "\n\n", 3);
}
headerLen = (int)XSTRLEN(header);