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ntlm: Updated Curl_ntlm_core_mk_ntlmv2_resp() to use local variables 

...until the function is successful when it returns them in the out
parameters.
This commit is contained in:
Steve Holme 2014-01-26 14:04:46 +00:00
parent 07b66cbfa4
commit 914b60c827
1 changed files with 10 additions and 7 deletions
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17
lib/curl_ntlm_core.c
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@ -547,6 +547,7 @@ CURLcode Curl_ntlm_core_mk_ntlmv2_resp(unsigned char *ntlmv2hash,
------------------------------------------------------------------------------
*/
unsigned int len = 0;
unsigned char *ptr = NULL;
unsigned char hmac_output[NTLM_HMAC_MD5_LEN];
long long tw;
@ -556,15 +557,14 @@ CURLcode Curl_ntlm_core_mk_ntlmv2_resp(unsigned char *ntlmv2hash,
tw = ((long long)time(NULL) + 11644473600ULL) * 10000000ULL;
/* Calculate the response len */
*ntresp_len = NTLM_HMAC_MD5_LEN + NTLMv2_BLOB_LEN;
len = NTLM_HMAC_MD5_LEN + NTLMv2_BLOB_LEN;
/* Allocate the response */
*ntresp = malloc(*ntresp_len);
if(!*ntresp)
ptr = malloc(len);
if(!ptr)
return CURLE_OUT_OF_MEMORY;
ptr = *ntresp;
memset(ptr, 0, *ntresp_len);
memset(ptr, 0, len);
/* Create the BLOB structure */
snprintf((char *)ptr + NTLM_HMAC_MD5_LEN, NTLMv2_BLOB_LEN,
@ -581,14 +581,17 @@ CURLcode Curl_ntlm_core_mk_ntlmv2_resp(unsigned char *ntlmv2hash,
res = Curl_hmac_md5(ntlmv2hash, NTLM_HMAC_MD5_LEN, ptr + 8,
NTLMv2_BLOB_LEN + 8, hmac_output);
if(res) {
Curl_safefree(*ntresp);
*ntresp_len = 0;
Curl_safefree(ptr);
return res;
}
/* Concatenate the HMAC MD5 output with the BLOB */
memcpy(ptr, hmac_output, NTLM_HMAC_MD5_LEN);
/* Return the response */
*ntresp = ptr;
*ntresp_len = len;
return res;
}