httpapiexsas.c

00001 // Copyright (c) Microsoft. All rights reserved.
00002 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
00003 
00004 #include <stdlib.h>
00005 #include "azure_c_shared_utility/gballoc.h"
00006 #include <stddef.h>
00007 #include <time.h>
00008 #include "azure_c_shared_utility/agenttime.h"
00009 #include "azure_c_shared_utility/strings.h"
00010 #include "azure_c_shared_utility/buffer_.h"
00011 #include "azure_c_shared_utility/sastoken.h"
00012 #include "azure_c_shared_utility/httpheaders.h"
00013 #include "azure_c_shared_utility/httpapiex.h"
00014 #include "azure_c_shared_utility/httpapiexsas.h"
00015 #include "azure_c_shared_utility/xlogging.h"
00016 #include "azure_c_shared_utility/crt_abstractions.h"
00017 
00018 typedef struct HTTPAPIEX_SAS_STATE_TAG
00019 {
00020     char* key;
00021     char* uriResource;
00022     char* keyName;
00023 } HTTPAPIEX_SAS_STATE;
00024 
00025 static HTTPAPIEX_SAS_STATE* construct_httpex_sas(const char* key, const char* uriResource, const char* keyName)
00026 {
00027     HTTPAPIEX_SAS_STATE* result;
00028 
00029     result = (HTTPAPIEX_SAS_STATE*)malloc(sizeof(HTTPAPIEX_SAS_STATE));
00030     if (result == NULL)
00031     {
00032         LogError("Failure allocating HTTPAPIEX_SAS_Create.");
00033     }
00034     else
00035     {
00036         (void)memset(result, 0, sizeof(HTTPAPIEX_SAS_STATE));
00037         if (mallocAndStrcpy_s(&result->key, key) != 0)
00038         {
00039             /*Codes_SRS_HTTPAPIEXSAS_06_004: [If there are any other errors in the instantiation of this handle then HTTPAPIEX_SAS_Create shall return NULL.]*/
00040             LogError("Failure allocating sas key.");
00041             HTTPAPIEX_SAS_Destroy(result);
00042             result = NULL;
00043         }
00044         else if (mallocAndStrcpy_s(&result->uriResource, uriResource) != 0)
00045         {
00046             /*Codes_SRS_HTTPAPIEXSAS_06_004: [If there are any other errors in the instantiation of this handle then HTTPAPIEX_SAS_Create shall return NULL.]*/
00047             LogError("Failure allocating sas uriResource.");
00048             HTTPAPIEX_SAS_Destroy(result);
00049             result = NULL;
00050         }
00051         else if (keyName != NULL && mallocAndStrcpy_s(&result->keyName, keyName) != 0)
00052         {
00053             /*Codes_SRS_HTTPAPIEXSAS_06_004: [If there are any other errors in the instantiation of this handle then HTTPAPIEX_SAS_Create shall return NULL.]*/
00054             LogError("Failure allocating sas keyName.");
00055             HTTPAPIEX_SAS_Destroy(result);
00056             result = NULL;
00057         }
00058     }
00059     return result;
00060 }
00061 
00062 HTTPAPIEX_SAS_HANDLE HTTPAPIEX_SAS_Create_From_String(const char* key, const char* uriResource, const char* keyName)
00063 {
00064     HTTPAPIEX_SAS_HANDLE result = NULL;
00065     if (key == NULL || uriResource == NULL)
00066     {
00067         /* Codes_SRS_HTTPAPIEXSAS_07_001: [ If the parameter key or uriResource is NULL then HTTPAPIEX_SAS_Create_From_String shall return NULL. ] */
00068         LogError("Invalid parameter key: %p, uriResource: %p", key, uriResource);
00069         result = NULL;
00070     }
00071     else
00072     {
00073         /* Codes_SRS_HTTPAPIEXSAS_07_002: [ If there are any other errors in the instantiation of this handle then HTTPAPIEX_SAS_Create_From_String shall return NULL. ] */
00074         result = construct_httpex_sas(key, uriResource, keyName);
00075     }
00076     /* Codes_SRS_HTTPAPIEXSAS_07_003: [ HTTPAPIEX_SAS_Create_From_String shall create a new instance of HTTPAPIEX_SAS and return a non-NULL handle to it ] */
00077     return result;
00078 }
00079 
00080 HTTPAPIEX_SAS_HANDLE HTTPAPIEX_SAS_Create(STRING_HANDLE key, STRING_HANDLE uriResource, STRING_HANDLE keyName)
00081 {
00082     HTTPAPIEX_SAS_HANDLE result = NULL;
00083     if (key == NULL)
00084     {
00085         /*Codes_SRS_HTTPAPIEXSAS_06_001: [If the parameter key is NULL then HTTPAPIEX_SAS_Create shall return NULL.]*/
00086         LogError("No key passed to HTTPAPIEX_SAS_Create.");
00087     }
00088     else if (uriResource == NULL)
00089     {
00090         /*Codes_SRS_HTTPAPIEXSAS_06_002: [If the parameter uriResource is NULL then HTTPAPIEX_SAS_Create shall return NULL.]*/
00091         LogError("No uri resource passed to HTTPAPIEX_SAS_Create.");
00092     }
00093     else
00094     {
00095         /*Codes_SRS_HTTPAPIEXSAS_06_003: [The parameter keyName for HTTPAPIEX_SAS_Create is optional and can be NULL.]*/
00096         /*Codes_SRS_HTTPAPIEXSAS_01_001: [ HTTPAPIEX_SAS_Create shall create a new instance of HTTPAPIEX_SAS and return a non-NULL handle to it. ]*/
00097         result = construct_httpex_sas(STRING_c_str(key), STRING_c_str(uriResource), STRING_c_str(keyName) );
00098     }
00099     return result;
00100 }
00101 
00102 void HTTPAPIEX_SAS_Destroy(HTTPAPIEX_SAS_HANDLE handle)
00103 {
00104     /*Codes_SRS_HTTPAPIEXSAS_06_005: [If the parameter handle is NULL then HTTAPIEX_SAS_Destroy shall do nothing and return.]*/
00105     if (handle)
00106     {
00107         HTTPAPIEX_SAS_STATE* state = (HTTPAPIEX_SAS_STATE*)handle;
00108         /*Codes_SRS_HTTPAPIEXSAS_06_006: [HTTAPIEX_SAS_Destroy shall deallocate any structures denoted by the parameter handle.]*/
00109         if (state->key)
00110         {
00111             free(state->key);
00112         }
00113         if (state->uriResource)
00114         {
00115             free(state->uriResource);
00116         }
00117         if (state->keyName)
00118         {
00119             free(state->keyName);
00120         }
00121         free(state);
00122     }
00123 }
00124 
00125 HTTPAPIEX_RESULT HTTPAPIEX_SAS_ExecuteRequest(HTTPAPIEX_SAS_HANDLE sasHandle, HTTPAPIEX_HANDLE handle, HTTPAPI_REQUEST_TYPE requestType, const char* relativePath, HTTP_HEADERS_HANDLE requestHttpHeadersHandle, BUFFER_HANDLE requestContent, unsigned int* statusCode, HTTP_HEADERS_HANDLE responseHeadersHandle, BUFFER_HANDLE responseContent)
00126 {
00127     /*Codes_SRS_HTTPAPIEXSAS_06_007: [If the parameter sasHandle is NULL then HTTPAPIEX_SAS_ExecuteRequest shall simply invoke HTTPAPIEX_ExecuteRequest with the remaining parameters (following sasHandle) as its arguments and shall return immediately with the result of that call as the result of HTTPAPIEX_SAS_ExecuteRequest.]*/
00128     if (sasHandle != NULL)
00129     {
00130         /*Codes_SRS_HTTPAPIEXSAS_06_008: [if the parameter requestHttpHeadersHandle is NULL then fallthrough.]*/
00131         if (requestHttpHeadersHandle != NULL)
00132         {
00133             /*Codes_SRS_HTTPAPIEXSAS_06_009: [HTTPHeaders_FindHeaderValue shall be invoked with the requestHttpHeadersHandle as its first argument and the string "Authorization" as its second argument.]*/
00134             /*Codes_SRS_HTTPAPIEXSAS_06_010: [If the return result of the invocation of HTTPHeaders_FindHeaderValue is NULL then fallthrough.]*/
00135             if (HTTPHeaders_FindHeaderValue(requestHttpHeadersHandle, "Authorization") != NULL)
00136             {
00137                 HTTPAPIEX_SAS_STATE* state = (HTTPAPIEX_SAS_STATE*)sasHandle;
00138                 /*Codes_SRS_HTTPAPIEXSAS_06_018: [A value of type time_t that shall be known as currentTime is obtained from calling get_time.]*/
00139                 time_t currentTime = get_time(NULL);
00140                 /*Codes_SRS_HTTPAPIEXSAS_06_019: [If the value of currentTime is (time_t)-1 is then fallthrough.]*/
00141                 if (currentTime == (time_t)-1)
00142                 {
00143                     LogError("Time does not appear to be working.");
00144                 }
00145                 else
00146                 {
00147                     /*Codes_SRS_HTTPAPIEXSAS_06_011: [SASToken_Create shall be invoked.]*/
00148                     /*Codes_SRS_HTTPAPIEXSAS_06_012: [If the return result of SASToken_Create is NULL then fallthrough.]*/
00149                     size_t expiry = (size_t)(difftime(currentTime, 0) + 3600);
00150                     STRING_HANDLE newSASToken = SASToken_CreateString(state->key, state->uriResource, state->keyName, expiry);
00151                     if (newSASToken != NULL)
00152                     {
00153                         /*Codes_SRS_HTTPAPIEXSAS_06_013: [HTTPHeaders_ReplaceHeaderNameValuePair shall be invoked with "Authorization" as its second argument and STRING_c_str (newSASToken) as its third argument.]*/
00154                         if (HTTPHeaders_ReplaceHeaderNameValuePair(requestHttpHeadersHandle, "Authorization", STRING_c_str(newSASToken)) != HTTP_HEADERS_OK)
00155                         {
00156                             /*Codes_SRS_HTTPAPIEXSAS_06_014: [If the result of the invocation of HTTPHeaders_ReplaceHeaderNameValuePair is NOT HTTP_HEADERS_OK then fallthrough.]*/
00157                             LogError("Unable to replace the old SAS Token.");
00158                         }
00159                         /*Codes_SRS_HTTPAPIEXSAS_06_015: [STRING_delete(newSASToken) will be invoked.]*/
00160                         STRING_delete(newSASToken);
00161                     }
00162                     else
00163                     {
00164                         LogError("Unable to create a new SAS token.");
00165                     }
00166                 }
00167             }
00168         }
00169     }
00170     /*Codes_SRS_HTTPAPIEXSAS_06_016: [HTTPAPIEX_ExecuteRequest with the remaining parameters (following sasHandle) as its arguments will be invoked and the result of that call is the result of HTTPAPIEX_SAS_ExecuteRequest.]*/
00171     return HTTPAPIEX_ExecuteRequest(handle,requestType,relativePath,requestHttpHeadersHandle,requestContent,statusCode,responseHeadersHandle,responseContent);
00172 }