/* Codes_SRS_CONNECTIONSTRINGPARSER_21_022: [connectionstringparser_splitHostName_from_char shall split the provided hostName in name and suffix.]*/
int connectionstringparser_splitHostName_from_char(const char* hostName, STRING_HANDLE nameString, STRING_HANDLE suffixString)
{
int result;
const char* runHostName = hostName;
if ((hostName == NULL) || ((*hostName) == '\0') || ((*hostName) == '.') || (nameString == NULL) || (suffixString == NULL))
{
/* Codes_SRS_CONNECTIONSTRINGPARSER_21_026: [If the hostName is NULL, connectionstringparser_splitHostName_from_char shall return __FAILURE__.]*/
/* Codes_SRS_CONNECTIONSTRINGPARSER_21_027: [If the hostName is an empty string, connectionstringparser_splitHostName_from_char shall return __FAILURE__.]*/
/* Codes_SRS_CONNECTIONSTRINGPARSER_21_028: [If the nameString is NULL, connectionstringparser_splitHostName_from_char shall return __FAILURE__.]*/
/* Codes_SRS_CONNECTIONSTRINGPARSER_21_029: [If the suffixString is NULL, connectionstringparser_splitHostName_from_char shall return __FAILURE__.]*/
/* Codes_SRS_CONNECTIONSTRINGPARSER_21_030: [If the hostName is not a valid host name, connectionstringparser_splitHostName_from_char shall return __FAILURE__.]*/
result = __FAILURE__;
}
else
{
while ((*runHostName) != '\0')
{
if ((*runHostName) == '.')
{
/* Codes_SRS_CONNECTIONSTRINGPARSER_21_023: [connectionstringparser_splitHostName_from_char shall copy all characters, from the beginning of the hostName to the first `.` to the nameString.]*/
/* Codes_SRS_CONNECTIONSTRINGPARSER_21_024: [connectionstringparser_splitHostName_from_char shall copy all characters, from the first `.` to the end of the hostName, to the suffixString.]*/
runHostName++;
break;
}
runHostName++;
}
if ((*runHostName) == '\0')
{
/* Codes_SRS_CONNECTIONSTRINGPARSER_21_030: [If the hostName is not a valid host name, connectionstringparser_splitHostName_from_char shall return __FAILURE__.]*/
result = __FAILURE__;
}
else
{
/* Codes_SRS_CONNECTIONSTRINGPARSER_21_023: [connectionstringparser_splitHostName_from_char shall copy all characters, from the beginning of the hostName to the first `.` to the nameString.]*/
if (STRING_copy_n(nameString, hostName, runHostName - hostName - 1) != 0)
{
/* Codes_SRS_CONNECTIONSTRINGPARSER_21_031: [If connectionstringparser_splitHostName_from_char get error copying the name to the nameString, it shall return __FAILURE__.]*/
result = __FAILURE__;
}
/* Codes_SRS_CONNECTIONSTRINGPARSER_21_024: [connectionstringparser_splitHostName_from_char shall copy all characters, from the first `.` to the end of the hostName, to the suffixString.]*/
else if (STRING_copy(suffixString, runHostName) != 0)
{
/* Codes_SRS_CONNECTIONSTRINGPARSER_21_032: [If connectionstringparser_splitHostName_from_char get error copying the suffix to the suffixString, it shall return __FAILURE__.]*/
result = __FAILURE__;
}
else
{
/* Codes_SRS_CONNECTIONSTRINGPARSER_21_025: [If connectionstringparser_splitHostName_from_char get success splitting the hostName, it shall return 0.]*/
result = 0;
}
}
}
return result;
}
STRING_HANDLE SASToken_Create(STRING_HANDLE key, STRING_HANDLE scope, STRING_HANDLE keyName, size_t expiry)
{
STRING_HANDLE result = NULL;
char tokenExpirationTime[32] = { 0 };
/*Codes_SRS_SASTOKEN_06_001: [If key is NULL then SASToken_Create shall return NULL.]*/
/*Codes_SRS_SASTOKEN_06_003: [If scope is NULL then SASToken_Create shall return NULL.]*/
/*Codes_SRS_SASTOKEN_06_007: [If keyName is NULL then SASToken_Create shall return NULL.]*/
if ((key == NULL) ||
(scope == NULL) ||
(keyName == NULL))
{
LogError("Invalid Parameter to SASToken_Create. handle key: %p, handle scope: %p, handle keyName: %p\r\n", key, scope, keyName);
}
else
{
BUFFER_HANDLE decodedKey;
/*Codes_SRS_SASTOKEN_06_029: [The key parameter is decoded from base64.]*/
if ((decodedKey = Base64_Decoder(STRING_c_str(key))) == NULL)
{
/*Codes_SRS_SASTOKEN_06_030: [If there is an error in the decoding then SASToken_Create shall return NULL.]*/
LogError("Unable to decode the key for generating the SAS.\r\n");
}
else
{
/*Codes_SRS_SASTOKEN_06_026: [If the conversion to string form fails for any reason then SASToken_Create shall return NULL.]*/
if (size_tToString(tokenExpirationTime, sizeof(tokenExpirationTime), expiry) != 0)
{
LogError("For some reason converting seconds to a string failed. No SAS can be generated.\r\n");
}
else
{
STRING_HANDLE toBeHashed = NULL;
BUFFER_HANDLE hash = NULL;
if (((hash = BUFFER_new()) == NULL) ||
((toBeHashed = STRING_new()) == NULL) ||
((result = STRING_new()) == NULL))
{
LogError("Unable to allocate memory to prepare SAS token.\r\n")
}
else
{
/*Codes_SRS_SASTOKEN_06_009: [The scope is the basis for creating a STRING_HANDLE.]*/
/*Codes_SRS_SASTOKEN_06_010: [A "\n" is appended to that string.]*/
/*Codes_SRS_SASTOKEN_06_011: [tokenExpirationTime is appended to that string.]*/
if ((STRING_concat_with_STRING(toBeHashed, scope) != 0) ||
(STRING_concat(toBeHashed, "\n") != 0) ||
(STRING_concat(toBeHashed, tokenExpirationTime) != 0))
{
LogError("Unable to build the input to the HMAC to prepare SAS token.\r\n");
STRING_delete(result);
result = NULL;
}
else
{
STRING_HANDLE base64Signature = NULL;
STRING_HANDLE urlEncodedSignature = NULL;
/*Codes_SRS_SASTOKEN_06_013: [If an error is returned from the HMAC256 function then NULL is returned from SASToken_Create.]*/
/*Codes_SRS_SASTOKEN_06_012: [An HMAC256 hash is calculated using the decodedKey, over toBeHashed.]*/
/*Codes_SRS_SASTOKEN_06_014: [If there are any errors from the following operations then NULL shall be returned.]*/
/*Codes_SRS_SASTOKEN_06_015: [The hash is base 64 encoded.]*/
/*Codes_SRS_SASTOKEN_06_028: [base64Signature shall be url encoded.]*/
/*Codes_SRS_SASTOKEN_06_016: [The string "SharedAccessSignature sr=" is the first part of the result of SASToken_Create.]*/
/*Codes_SRS_SASTOKEN_06_017: [The scope parameter is appended to result.]*/
/*Codes_SRS_SASTOKEN_06_018: [The string "&sig=" is appended to result.]*/
/*Codes_SRS_SASTOKEN_06_019: [The string urlEncodedSignature shall be appended to result.]*/
/*Codes_SRS_SASTOKEN_06_020: [The string "&se=" shall be appended to result.]*/
/*Codes_SRS_SASTOKEN_06_021: [tokenExpirationTime is appended to result.]*/
/*Codes_SRS_SASTOKEN_06_022: [The string "&skn=" is appended to result.]*/
/*Codes_SRS_SASTOKEN_06_023: [The argument keyName is appended to result.]*/
if ((HMACSHA256_ComputeHash(BUFFER_u_char(decodedKey), BUFFER_length(decodedKey), (const unsigned char*)STRING_c_str(toBeHashed), STRING_length(toBeHashed), hash) != HMACSHA256_OK) ||
((base64Signature = Base64_Encode(hash)) == NULL) ||
((urlEncodedSignature = URL_Encode(base64Signature)) == NULL) ||
(STRING_copy(result, "SharedAccessSignature sr=") != 0) ||
(STRING_concat_with_STRING(result, scope) != 0) ||
(STRING_concat(result, "&sig=") != 0) ||
(STRING_concat_with_STRING(result, urlEncodedSignature) != 0) ||
(STRING_concat(result, "&se=") != 0) ||
(STRING_concat(result, tokenExpirationTime) != 0) ||
(STRING_concat(result, "&skn=") != 0) ||
(STRING_concat_with_STRING(result, keyName) != 0))
{
LogError("Unable to build the SAS token.\r\n");
STRING_delete(result);
result = NULL;
}
else
{
/* everything OK */
}
STRING_delete(base64Signature);
STRING_delete(urlEncodedSignature);
}
}
STRING_delete(toBeHashed);
BUFFER_delete(hash);
}
BUFFER_delete(decodedKey);
}
}
return result;
}