Azure IoT / azure_c_shared_utility

Azure IoT common library

Dependents:   STM32F746_iothub_client_sample_mqtt f767zi_mqtt iothub_client_sample_amqp iothub_client_sample_http ... more

sastoken.c@23:ba126c6eb699, 2017-03-24 (annotated)

Committer:
AzureIoTClient
Date:
Fri Mar 24 16:36:20 2017 -0700
Revision:
23:ba126c6eb699
Parent:
19:2e0811512ceb
Child:
25:8507bf644fdf
1.1.10

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Azure.IoT Build 0:fa2de1b79154 1 // Copyright (c) Microsoft. All rights reserved.
Azure.IoT Build 0:fa2de1b79154 2 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
Azure.IoT Build 0:fa2de1b79154 3
AzureIoTClient 19:2e0811512ceb 4 #include <stdlib.h>
Azure.IoT Build 0:fa2de1b79154 5 #include "azure_c_shared_utility/gballoc.h"
Azure.IoT Build 0:fa2de1b79154 6 #include "azure_c_shared_utility/sastoken.h"
Azure.IoT Build 0:fa2de1b79154 7 #include "azure_c_shared_utility/urlencode.h"
Azure.IoT Build 0:fa2de1b79154 8 #include "azure_c_shared_utility/hmacsha256.h"
Azure.IoT Build 0:fa2de1b79154 9 #include "azure_c_shared_utility/base64.h"
Azure.IoT Build 0:fa2de1b79154 10 #include "azure_c_shared_utility/agenttime.h"
Azure.IoT Build 0:fa2de1b79154 11 #include "azure_c_shared_utility/strings.h"
Azure.IoT Build 0:fa2de1b79154 12 #include "azure_c_shared_utility/buffer_.h"
Azure.IoT Build 6:c55b013dfc2a 13 #include "azure_c_shared_utility/xlogging.h"
AzureIoTClient 15:956c6d205aa7 14 #include "azure_c_shared_utility/crt_abstractions.h"
AzureIoTClient 15:956c6d205aa7 15
AzureIoTClient 15:956c6d205aa7 16 static double getExpiryValue(const char* expiryASCII)
AzureIoTClient 15:956c6d205aa7 17 {
AzureIoTClient 15:956c6d205aa7 18 double value = 0;
AzureIoTClient 15:956c6d205aa7 19 size_t i = 0;
AzureIoTClient 15:956c6d205aa7 20 for (i = 0; expiryASCII[i] != '\0'; i++)
AzureIoTClient 15:956c6d205aa7 21 {
AzureIoTClient 15:956c6d205aa7 22 if (expiryASCII[i] >= '0' && expiryASCII[i] <= '9')
AzureIoTClient 15:956c6d205aa7 23 {
AzureIoTClient 15:956c6d205aa7 24 value = value * 10 + (expiryASCII[i] - '0');
AzureIoTClient 15:956c6d205aa7 25 }
AzureIoTClient 15:956c6d205aa7 26 else
AzureIoTClient 15:956c6d205aa7 27 {
AzureIoTClient 15:956c6d205aa7 28 value = 0;
AzureIoTClient 15:956c6d205aa7 29 break;
AzureIoTClient 15:956c6d205aa7 30 }
AzureIoTClient 15:956c6d205aa7 31 }
AzureIoTClient 15:956c6d205aa7 32 return value;
AzureIoTClient 15:956c6d205aa7 33 }
AzureIoTClient 15:956c6d205aa7 34
AzureIoTClient 15:956c6d205aa7 35 bool SASToken_Validate(STRING_HANDLE sasToken)
AzureIoTClient 15:956c6d205aa7 36 {
AzureIoTClient 15:956c6d205aa7 37 bool result;
AzureIoTClient 15:956c6d205aa7 38 /*Codes_SRS_SASTOKEN_25_025: [**SASToken_Validate shall get the SASToken value by invoking STRING_c_str on the handle.**]***/
AzureIoTClient 15:956c6d205aa7 39 const char* sasTokenArray = STRING_c_str(sasToken);
AzureIoTClient 15:956c6d205aa7 40
AzureIoTClient 15:956c6d205aa7 41 /***Codes_SRS_SASTOKEN_25_024: [**If handle is NULL then SASToken_Validate shall return false.**] ***/
AzureIoTClient 15:956c6d205aa7 42 /*Codes_SRS_SASTOKEN_25_026: [**If STRING_c_str on handle return NULL then SASToken_Validate shall return false.**]***/
AzureIoTClient 15:956c6d205aa7 43 if (sasToken == NULL || sasTokenArray == NULL)
AzureIoTClient 15:956c6d205aa7 44 {
AzureIoTClient 15:956c6d205aa7 45 result = false;
AzureIoTClient 15:956c6d205aa7 46 }
AzureIoTClient 15:956c6d205aa7 47 else
AzureIoTClient 15:956c6d205aa7 48 {
AzureIoTClient 15:956c6d205aa7 49 int seStart = -1, seStop = -1;
AzureIoTClient 15:956c6d205aa7 50 int srStart = -1, srStop = -1;
AzureIoTClient 15:956c6d205aa7 51 int sigStart = -1, sigStop = -1;
AzureIoTClient 15:956c6d205aa7 52 int tokenLength = (int) STRING_length(sasToken);
AzureIoTClient 15:956c6d205aa7 53 int i ;
AzureIoTClient 15:956c6d205aa7 54 for (i = 0; i < tokenLength; i++)
AzureIoTClient 15:956c6d205aa7 55 {
AzureIoTClient 15:956c6d205aa7 56 if (sasTokenArray[i] == 's' && sasTokenArray[i + 1] == 'e' && sasTokenArray[i + 2] == '=') // Look for se=
AzureIoTClient 15:956c6d205aa7 57 {
AzureIoTClient 15:956c6d205aa7 58 seStart = i + 3;
AzureIoTClient 15:956c6d205aa7 59 if (srStart > 0 && srStop < 0)
AzureIoTClient 15:956c6d205aa7 60 {
AzureIoTClient 15:956c6d205aa7 61 if (sasTokenArray[i - 1] != '&' && sasTokenArray[i - 1] == ' ') // look for either & or space
AzureIoTClient 15:956c6d205aa7 62 srStop = i - 1;
AzureIoTClient 15:956c6d205aa7 63 else if (sasTokenArray[i - 1] == '&')
AzureIoTClient 15:956c6d205aa7 64 srStop = i - 2;
AzureIoTClient 15:956c6d205aa7 65 else
AzureIoTClient 15:956c6d205aa7 66 seStart = -1; // as the format is not either "&se=" or " se="
AzureIoTClient 15:956c6d205aa7 67 }
AzureIoTClient 15:956c6d205aa7 68 else if (sigStart > 0 && sigStop < 0)
AzureIoTClient 15:956c6d205aa7 69 {
AzureIoTClient 15:956c6d205aa7 70 if (sasTokenArray[i - 1] != '&' && sasTokenArray[i - 1] == ' ')
AzureIoTClient 15:956c6d205aa7 71 sigStop = i - 1;
AzureIoTClient 15:956c6d205aa7 72 else if (sasTokenArray[i - 1] == '&')
AzureIoTClient 15:956c6d205aa7 73 sigStop = i - 2;
AzureIoTClient 15:956c6d205aa7 74 else
AzureIoTClient 15:956c6d205aa7 75 seStart = -1;
AzureIoTClient 15:956c6d205aa7 76 }
AzureIoTClient 15:956c6d205aa7 77 continue;
AzureIoTClient 15:956c6d205aa7 78 }
AzureIoTClient 15:956c6d205aa7 79 if (sasTokenArray[i] == 's' && sasTokenArray[i + 1] == 'r' && sasTokenArray[i + 2] == '=') // Look for sr=
AzureIoTClient 15:956c6d205aa7 80 {
AzureIoTClient 15:956c6d205aa7 81 srStart = i + 3;
AzureIoTClient 15:956c6d205aa7 82 if (seStart > 0 && seStop < 0)
AzureIoTClient 15:956c6d205aa7 83 {
AzureIoTClient 15:956c6d205aa7 84 if (sasTokenArray[i - 1] != '&' && sasTokenArray[i - 1] == ' ')
AzureIoTClient 15:956c6d205aa7 85 seStop = i - 1;
AzureIoTClient 15:956c6d205aa7 86 else if (sasTokenArray[i - 1] == '&')
AzureIoTClient 15:956c6d205aa7 87 seStop = i - 2;
AzureIoTClient 15:956c6d205aa7 88 else
AzureIoTClient 15:956c6d205aa7 89 srStart = -1;
AzureIoTClient 15:956c6d205aa7 90 }
AzureIoTClient 15:956c6d205aa7 91 else if (sigStart > 0 && sigStop < 0)
AzureIoTClient 15:956c6d205aa7 92 {
AzureIoTClient 15:956c6d205aa7 93 if (sasTokenArray[i - 1] != '&' && sasTokenArray[i - 1] == ' ')
AzureIoTClient 15:956c6d205aa7 94 sigStop = i - 1;
AzureIoTClient 15:956c6d205aa7 95 else if (sasTokenArray[i - 1] == '&')
AzureIoTClient 15:956c6d205aa7 96 sigStop = i - 2;
AzureIoTClient 15:956c6d205aa7 97 else
AzureIoTClient 15:956c6d205aa7 98 srStart = -1;
AzureIoTClient 15:956c6d205aa7 99 }
AzureIoTClient 15:956c6d205aa7 100 continue;
AzureIoTClient 15:956c6d205aa7 101 }
AzureIoTClient 15:956c6d205aa7 102 if (sasTokenArray[i] == 's' && sasTokenArray[i + 1] == 'i' && sasTokenArray[i + 2] == 'g' && sasTokenArray[i + 3] == '=') // Look for sig=
AzureIoTClient 15:956c6d205aa7 103 {
AzureIoTClient 15:956c6d205aa7 104 sigStart = i + 4;
AzureIoTClient 15:956c6d205aa7 105 if (srStart > 0 && srStop < 0)
AzureIoTClient 15:956c6d205aa7 106 {
AzureIoTClient 15:956c6d205aa7 107 if (sasTokenArray[i - 1] != '&' && sasTokenArray[i - 1] == ' ')
AzureIoTClient 15:956c6d205aa7 108 srStop = i - 1;
AzureIoTClient 15:956c6d205aa7 109 else if (sasTokenArray[i - 1] == '&')
AzureIoTClient 15:956c6d205aa7 110 srStop = i - 2;
AzureIoTClient 15:956c6d205aa7 111 else
AzureIoTClient 15:956c6d205aa7 112 sigStart = -1;
AzureIoTClient 15:956c6d205aa7 113 }
AzureIoTClient 15:956c6d205aa7 114 else if (seStart > 0 && seStop < 0)
AzureIoTClient 15:956c6d205aa7 115 {
AzureIoTClient 15:956c6d205aa7 116 if (sasTokenArray[i - 1] != '&' && sasTokenArray[i - 1] == ' ')
AzureIoTClient 15:956c6d205aa7 117 seStop = i - 1;
AzureIoTClient 15:956c6d205aa7 118 else if (sasTokenArray[i - 1] == '&')
AzureIoTClient 15:956c6d205aa7 119 seStop = i - 2;
AzureIoTClient 15:956c6d205aa7 120 else
AzureIoTClient 15:956c6d205aa7 121 sigStart = -1;
AzureIoTClient 15:956c6d205aa7 122 }
AzureIoTClient 15:956c6d205aa7 123 continue;
AzureIoTClient 15:956c6d205aa7 124 }
AzureIoTClient 15:956c6d205aa7 125 }
AzureIoTClient 15:956c6d205aa7 126 /*Codes_SRS_SASTOKEN_25_027: [**If SASTOKEN does not obey the SASToken format then SASToken_Validate shall return false.**]***/
AzureIoTClient 15:956c6d205aa7 127 /*Codes_SRS_SASTOKEN_25_028: [**SASToken_validate shall check for the presence of sr, se and sig from the token and return false if not found**]***/
AzureIoTClient 15:956c6d205aa7 128 if (seStart < 0 || srStart < 0 || sigStart < 0)
AzureIoTClient 15:956c6d205aa7 129 {
AzureIoTClient 15:956c6d205aa7 130 result = false;
AzureIoTClient 15:956c6d205aa7 131 }
AzureIoTClient 15:956c6d205aa7 132 else
AzureIoTClient 15:956c6d205aa7 133 {
AzureIoTClient 15:956c6d205aa7 134 if (seStop < 0)
AzureIoTClient 15:956c6d205aa7 135 {
AzureIoTClient 15:956c6d205aa7 136 seStop = tokenLength;
AzureIoTClient 15:956c6d205aa7 137 }
AzureIoTClient 15:956c6d205aa7 138 else if (srStop < 0)
AzureIoTClient 15:956c6d205aa7 139 {
AzureIoTClient 15:956c6d205aa7 140 srStop = tokenLength;
AzureIoTClient 15:956c6d205aa7 141 }
AzureIoTClient 15:956c6d205aa7 142 else if (sigStop < 0)
AzureIoTClient 15:956c6d205aa7 143 {
AzureIoTClient 15:956c6d205aa7 144 sigStop = tokenLength;
AzureIoTClient 15:956c6d205aa7 145 }
AzureIoTClient 15:956c6d205aa7 146
AzureIoTClient 15:956c6d205aa7 147 if ((seStop <= seStart) ||
AzureIoTClient 15:956c6d205aa7 148 (srStop <= srStart) ||
AzureIoTClient 15:956c6d205aa7 149 (sigStop <= sigStart))
AzureIoTClient 15:956c6d205aa7 150 {
AzureIoTClient 15:956c6d205aa7 151 result = false;
AzureIoTClient 15:956c6d205aa7 152 }
AzureIoTClient 15:956c6d205aa7 153 else
AzureIoTClient 15:956c6d205aa7 154 {
AzureIoTClient 15:956c6d205aa7 155 char* expiryASCII = malloc(seStop - seStart + 1);
AzureIoTClient 15:956c6d205aa7 156 /*Codes_SRS_SASTOKEN_25_031: [**If malloc fails during validation then SASToken_Validate shall return false.**]***/
AzureIoTClient 15:956c6d205aa7 157 if (expiryASCII == NULL)
AzureIoTClient 15:956c6d205aa7 158 {
AzureIoTClient 15:956c6d205aa7 159 result = false;
AzureIoTClient 15:956c6d205aa7 160 }
AzureIoTClient 15:956c6d205aa7 161 else
AzureIoTClient 15:956c6d205aa7 162 {
AzureIoTClient 15:956c6d205aa7 163 double expiry;
AzureIoTClient 15:956c6d205aa7 164 for (i = seStart; i < seStop; i++)
AzureIoTClient 15:956c6d205aa7 165 {
AzureIoTClient 15:956c6d205aa7 166 expiryASCII[i - seStart] = sasTokenArray[i];
AzureIoTClient 15:956c6d205aa7 167 }
AzureIoTClient 15:956c6d205aa7 168 expiryASCII[seStop - seStart] = '\0';
AzureIoTClient 15:956c6d205aa7 169
AzureIoTClient 15:956c6d205aa7 170 expiry = getExpiryValue(expiryASCII);
AzureIoTClient 15:956c6d205aa7 171 /*Codes_SRS_SASTOKEN_25_029: [**SASToken_validate shall check for expiry time from token and if token has expired then would return false **]***/
AzureIoTClient 15:956c6d205aa7 172 if (expiry <= 0)
AzureIoTClient 15:956c6d205aa7 173 {
AzureIoTClient 15:956c6d205aa7 174 result = false;
AzureIoTClient 15:956c6d205aa7 175 }
AzureIoTClient 15:956c6d205aa7 176 else
AzureIoTClient 15:956c6d205aa7 177 {
AzureIoTClient 15:956c6d205aa7 178 double secSinceEpoch = get_difftime(get_time(NULL), (time_t)0);
AzureIoTClient 15:956c6d205aa7 179 if (expiry < secSinceEpoch)
AzureIoTClient 15:956c6d205aa7 180 {
AzureIoTClient 15:956c6d205aa7 181 /*Codes_SRS_SASTOKEN_25_029: [**SASToken_validate shall check for expiry time from token and if token has expired then would return false **]***/
AzureIoTClient 15:956c6d205aa7 182 result = false;
AzureIoTClient 15:956c6d205aa7 183 }
AzureIoTClient 15:956c6d205aa7 184 else
AzureIoTClient 15:956c6d205aa7 185 {
AzureIoTClient 15:956c6d205aa7 186 /*Codes_SRS_SASTOKEN_25_030: [**SASToken_validate shall return true only if the format is obeyed and the token has not yet expired **]***/
AzureIoTClient 15:956c6d205aa7 187 result = true;
AzureIoTClient 15:956c6d205aa7 188 }
AzureIoTClient 15:956c6d205aa7 189 }
AzureIoTClient 15:956c6d205aa7 190 free(expiryASCII);
AzureIoTClient 15:956c6d205aa7 191 }
AzureIoTClient 15:956c6d205aa7 192 }
AzureIoTClient 15:956c6d205aa7 193 }
AzureIoTClient 15:956c6d205aa7 194 }
AzureIoTClient 15:956c6d205aa7 195
AzureIoTClient 15:956c6d205aa7 196 return result;
AzureIoTClient 15:956c6d205aa7 197 }
Azure.IoT Build 0:fa2de1b79154 198
AzureIoTClient 23:ba126c6eb699 199 static STRING_HANDLE construct_sas_token(const char* key, const char* scope, const char* keyname, size_t expiry)
AzureIoTClient 23:ba126c6eb699 200 {
AzureIoTClient 23:ba126c6eb699 201 STRING_HANDLE result;
AzureIoTClient 23:ba126c6eb699 202
AzureIoTClient 23:ba126c6eb699 203 char tokenExpirationTime[32] = { 0 };
AzureIoTClient 23:ba126c6eb699 204
AzureIoTClient 23:ba126c6eb699 205 BUFFER_HANDLE decodedKey;
AzureIoTClient 23:ba126c6eb699 206
AzureIoTClient 23:ba126c6eb699 207 /*Codes_SRS_SASTOKEN_06_029: [The key parameter is decoded from base64.]*/
AzureIoTClient 23:ba126c6eb699 208 if ((decodedKey = Base64_Decoder(key)) == NULL)
AzureIoTClient 23:ba126c6eb699 209 {
AzureIoTClient 23:ba126c6eb699 210 /*Codes_SRS_SASTOKEN_06_030: [If there is an error in the decoding then SASToken_Create shall return NULL.]*/
AzureIoTClient 23:ba126c6eb699 211 LogError("Unable to decode the key for generating the SAS.");
AzureIoTClient 23:ba126c6eb699 212 result = NULL;
AzureIoTClient 23:ba126c6eb699 213 }
AzureIoTClient 23:ba126c6eb699 214 else
AzureIoTClient 23:ba126c6eb699 215 {
AzureIoTClient 23:ba126c6eb699 216 /*Codes_SRS_SASTOKEN_06_026: [If the conversion to string form fails for any reason then SASToken_Create shall return NULL.]*/
AzureIoTClient 23:ba126c6eb699 217 if (size_tToString(tokenExpirationTime, sizeof(tokenExpirationTime), expiry) != 0)
AzureIoTClient 23:ba126c6eb699 218 {
AzureIoTClient 23:ba126c6eb699 219 LogError("For some reason converting seconds to a string failed. No SAS can be generated.");
AzureIoTClient 23:ba126c6eb699 220 result = NULL;
AzureIoTClient 23:ba126c6eb699 221 }
AzureIoTClient 23:ba126c6eb699 222 else
AzureIoTClient 23:ba126c6eb699 223 {
AzureIoTClient 23:ba126c6eb699 224 STRING_HANDLE toBeHashed = NULL;
AzureIoTClient 23:ba126c6eb699 225 BUFFER_HANDLE hash = NULL;
AzureIoTClient 23:ba126c6eb699 226 if (((hash = BUFFER_new()) == NULL) ||
AzureIoTClient 23:ba126c6eb699 227 ((toBeHashed = STRING_new()) == NULL) ||
AzureIoTClient 23:ba126c6eb699 228 ((result = STRING_new()) == NULL))
AzureIoTClient 23:ba126c6eb699 229 {
AzureIoTClient 23:ba126c6eb699 230 LogError("Unable to allocate memory to prepare SAS token.");
AzureIoTClient 23:ba126c6eb699 231 result = NULL;
AzureIoTClient 23:ba126c6eb699 232 }
AzureIoTClient 23:ba126c6eb699 233 else
AzureIoTClient 23:ba126c6eb699 234 {
AzureIoTClient 23:ba126c6eb699 235 /*Codes_SRS_SASTOKEN_06_009: [The scope is the basis for creating a STRING_HANDLE.]*/
AzureIoTClient 23:ba126c6eb699 236 /*Codes_SRS_SASTOKEN_06_010: [A "\n" is appended to that string.]*/
AzureIoTClient 23:ba126c6eb699 237 /*Codes_SRS_SASTOKEN_06_011: [tokenExpirationTime is appended to that string.]*/
AzureIoTClient 23:ba126c6eb699 238 if ((STRING_concat(toBeHashed, scope) != 0) ||
AzureIoTClient 23:ba126c6eb699 239 (STRING_concat(toBeHashed, "\n") != 0) ||
AzureIoTClient 23:ba126c6eb699 240 (STRING_concat(toBeHashed, tokenExpirationTime) != 0))
AzureIoTClient 23:ba126c6eb699 241 {
AzureIoTClient 23:ba126c6eb699 242 LogError("Unable to build the input to the HMAC to prepare SAS token.");
AzureIoTClient 23:ba126c6eb699 243 STRING_delete(result);
AzureIoTClient 23:ba126c6eb699 244 result = NULL;
AzureIoTClient 23:ba126c6eb699 245 }
AzureIoTClient 23:ba126c6eb699 246 else
AzureIoTClient 23:ba126c6eb699 247 {
AzureIoTClient 23:ba126c6eb699 248 STRING_HANDLE base64Signature = NULL;
AzureIoTClient 23:ba126c6eb699 249 STRING_HANDLE urlEncodedSignature = NULL;
AzureIoTClient 23:ba126c6eb699 250 size_t inLen = STRING_length(toBeHashed);
AzureIoTClient 23:ba126c6eb699 251 const unsigned char* inBuf = (const unsigned char*)STRING_c_str(toBeHashed);
AzureIoTClient 23:ba126c6eb699 252 size_t outLen = BUFFER_length(decodedKey);
AzureIoTClient 23:ba126c6eb699 253 unsigned char* outBuf = BUFFER_u_char(decodedKey);
AzureIoTClient 23:ba126c6eb699 254 /*Codes_SRS_SASTOKEN_06_013: [If an error is returned from the HMAC256 function then NULL is returned from SASToken_Create.]*/
AzureIoTClient 23:ba126c6eb699 255 /*Codes_SRS_SASTOKEN_06_012: [An HMAC256 hash is calculated using the decodedKey, over toBeHashed.]*/
AzureIoTClient 23:ba126c6eb699 256 /*Codes_SRS_SASTOKEN_06_014: [If there are any errors from the following operations then NULL shall be returned.]*/
AzureIoTClient 23:ba126c6eb699 257 /*Codes_SRS_SASTOKEN_06_015: [The hash is base 64 encoded.]*/
AzureIoTClient 23:ba126c6eb699 258 /*Codes_SRS_SASTOKEN_06_028: [base64Signature shall be url encoded.]*/
AzureIoTClient 23:ba126c6eb699 259 /*Codes_SRS_SASTOKEN_06_016: [The string "SharedAccessSignature sr=" is the first part of the result of SASToken_Create.]*/
AzureIoTClient 23:ba126c6eb699 260 /*Codes_SRS_SASTOKEN_06_017: [The scope parameter is appended to result.]*/
AzureIoTClient 23:ba126c6eb699 261 /*Codes_SRS_SASTOKEN_06_018: [The string "&sig=" is appended to result.]*/
AzureIoTClient 23:ba126c6eb699 262 /*Codes_SRS_SASTOKEN_06_019: [The string urlEncodedSignature shall be appended to result.]*/
AzureIoTClient 23:ba126c6eb699 263 /*Codes_SRS_SASTOKEN_06_020: [The string "&se=" shall be appended to result.]*/
AzureIoTClient 23:ba126c6eb699 264 /*Codes_SRS_SASTOKEN_06_021: [tokenExpirationTime is appended to result.]*/
AzureIoTClient 23:ba126c6eb699 265 /*Codes_SRS_SASTOKEN_06_022: [The string "&skn=" is appended to result.]*/
AzureIoTClient 23:ba126c6eb699 266 /*Codes_SRS_SASTOKEN_06_023: [The argument keyName is appended to result.]*/
AzureIoTClient 23:ba126c6eb699 267 if ((HMACSHA256_ComputeHash(outBuf, outLen, inBuf, inLen, hash) != HMACSHA256_OK) ||
AzureIoTClient 23:ba126c6eb699 268 ((base64Signature = Base64_Encode(hash)) == NULL) ||
AzureIoTClient 23:ba126c6eb699 269 ((urlEncodedSignature = URL_Encode(base64Signature)) == NULL) ||
AzureIoTClient 23:ba126c6eb699 270 (STRING_copy(result, "SharedAccessSignature sr=") != 0) ||
AzureIoTClient 23:ba126c6eb699 271 (STRING_concat(result, scope) != 0) ||
AzureIoTClient 23:ba126c6eb699 272 (STRING_concat(result, "&sig=") != 0) ||
AzureIoTClient 23:ba126c6eb699 273 (STRING_concat_with_STRING(result, urlEncodedSignature) != 0) ||
AzureIoTClient 23:ba126c6eb699 274 (STRING_concat(result, "&se=") != 0) ||
AzureIoTClient 23:ba126c6eb699 275 (STRING_concat(result, tokenExpirationTime) != 0) ||
AzureIoTClient 23:ba126c6eb699 276 (STRING_concat(result, "&skn=") != 0) ||
AzureIoTClient 23:ba126c6eb699 277 (STRING_concat(result, keyname) != 0))
AzureIoTClient 23:ba126c6eb699 278 {
AzureIoTClient 23:ba126c6eb699 279 LogError("Unable to build the SAS token.");
AzureIoTClient 23:ba126c6eb699 280 STRING_delete(result);
AzureIoTClient 23:ba126c6eb699 281 result = NULL;
AzureIoTClient 23:ba126c6eb699 282 }
AzureIoTClient 23:ba126c6eb699 283 else
AzureIoTClient 23:ba126c6eb699 284 {
AzureIoTClient 23:ba126c6eb699 285 /* everything OK */
AzureIoTClient 23:ba126c6eb699 286 }
AzureIoTClient 23:ba126c6eb699 287 STRING_delete(base64Signature);
AzureIoTClient 23:ba126c6eb699 288 STRING_delete(urlEncodedSignature);
AzureIoTClient 23:ba126c6eb699 289 }
AzureIoTClient 23:ba126c6eb699 290 }
AzureIoTClient 23:ba126c6eb699 291 STRING_delete(toBeHashed);
AzureIoTClient 23:ba126c6eb699 292 BUFFER_delete(hash);
AzureIoTClient 23:ba126c6eb699 293 }
AzureIoTClient 23:ba126c6eb699 294 BUFFER_delete(decodedKey);
AzureIoTClient 23:ba126c6eb699 295 }
AzureIoTClient 23:ba126c6eb699 296 return result;
AzureIoTClient 23:ba126c6eb699 297 }
AzureIoTClient 23:ba126c6eb699 298
Azure.IoT Build 0:fa2de1b79154 299 STRING_HANDLE SASToken_Create(STRING_HANDLE key, STRING_HANDLE scope, STRING_HANDLE keyName, size_t expiry)
Azure.IoT Build 0:fa2de1b79154 300 {
AzureIoTClient 23:ba126c6eb699 301 STRING_HANDLE result;
Azure.IoT Build 0:fa2de1b79154 302
Azure.IoT Build 0:fa2de1b79154 303 /*Codes_SRS_SASTOKEN_06_001: [If key is NULL then SASToken_Create shall return NULL.]*/
Azure.IoT Build 0:fa2de1b79154 304 /*Codes_SRS_SASTOKEN_06_003: [If scope is NULL then SASToken_Create shall return NULL.]*/
Azure.IoT Build 0:fa2de1b79154 305 /*Codes_SRS_SASTOKEN_06_007: [If keyName is NULL then SASToken_Create shall return NULL.]*/
Azure.IoT Build 0:fa2de1b79154 306 if ((key == NULL) ||
Azure.IoT Build 0:fa2de1b79154 307 (scope == NULL) ||
Azure.IoT Build 0:fa2de1b79154 308 (keyName == NULL))
Azure.IoT Build 0:fa2de1b79154 309 {
AzureIoTClient 1:9190c0f4d23a 310 LogError("Invalid Parameter to SASToken_Create. handle key: %p, handle scope: %p, handle keyName: %p", key, scope, keyName);
AzureIoTClient 23:ba126c6eb699 311 result = NULL;
Azure.IoT Build 0:fa2de1b79154 312 }
Azure.IoT Build 0:fa2de1b79154 313 else
Azure.IoT Build 0:fa2de1b79154 314 {
AzureIoTClient 23:ba126c6eb699 315 const char* string_key = STRING_c_str(key);
AzureIoTClient 23:ba126c6eb699 316 const char* string_scope = STRING_c_str(scope);
AzureIoTClient 23:ba126c6eb699 317 const char* string_name = STRING_c_str(keyName);
AzureIoTClient 23:ba126c6eb699 318 result = construct_sas_token(string_key, string_scope, string_name, expiry);
Azure.IoT Build 0:fa2de1b79154 319 }
Azure.IoT Build 0:fa2de1b79154 320 return result;
Azure.IoT Build 0:fa2de1b79154 321 }
Azure.IoT Build 0:fa2de1b79154 322
AzureIoTClient 23:ba126c6eb699 323 STRING_HANDLE SASToken_CreateString(const char* key, const char* scope, const char* keyName, size_t expiry)
AzureIoTClient 23:ba126c6eb699 324 {
AzureIoTClient 23:ba126c6eb699 325 STRING_HANDLE result;
AzureIoTClient 23:ba126c6eb699 326
AzureIoTClient 23:ba126c6eb699 327 /*Codes_SRS_SASTOKEN_06_001: [If key is NULL then SASToken_Create shall return NULL.]*/
AzureIoTClient 23:ba126c6eb699 328 /*Codes_SRS_SASTOKEN_06_003: [If scope is NULL then SASToken_Create shall return NULL.]*/
AzureIoTClient 23:ba126c6eb699 329 /*Codes_SRS_SASTOKEN_06_007: [If keyName is NULL then SASToken_Create shall return NULL.]*/
AzureIoTClient 23:ba126c6eb699 330 if ((key == NULL) ||
AzureIoTClient 23:ba126c6eb699 331 (scope == NULL) ||
AzureIoTClient 23:ba126c6eb699 332 (keyName == NULL))
AzureIoTClient 23:ba126c6eb699 333 {
AzureIoTClient 23:ba126c6eb699 334 LogError("Invalid Parameter to SASToken_Create. handle key: %p, handle scope: %p, handle keyName: %p", key, scope, keyName);
AzureIoTClient 23:ba126c6eb699 335 result = NULL;
AzureIoTClient 23:ba126c6eb699 336 }
AzureIoTClient 23:ba126c6eb699 337 else
AzureIoTClient 23:ba126c6eb699 338 {
AzureIoTClient 23:ba126c6eb699 339 result = construct_sas_token(key, scope, keyName, expiry);
AzureIoTClient 23:ba126c6eb699 340 }
AzureIoTClient 23:ba126c6eb699 341 return result;
AzureIoTClient 23:ba126c6eb699 342 }