Date: 2025-03-28T21:11:14+00:00

Actual source code: box.c

      1: #include <petscwebclient.h>
      2: PETSC_PRAGMA_DIAGNOSTIC_IGNORED_BEGIN("-Wdeprecated-declarations")

      4: /*
      5:    These variables identify the code as a PETSc application to Box.

      7:    See -   https://stackoverflow.com/questions/4616553/using-oauth-in-free-open-source-software
      8:    Users can get their own application IDs - goto https://developer.box.com

     10: */
     11: #define PETSC_BOX_CLIENT_ID "sse42nygt4zqgrdwi0luv79q1u1f0xza"
     12: #define PETSC_BOX_CLIENT_ST "A0Dy4KgOYLB2JIYZqpbze4EzjeIiX5k4"

     14: #if defined(PETSC_HAVE_SAWS)
     15:   #include <mongoose.h>

     17: static volatile char *result = NULL;

     19: static int PetscBoxWebServer_Private(struct mg_connection *conn)
     20: {
     21:   const struct mg_request_info *request_info = mg_get_request_info(conn);
     22:   result                                     = (char *)request_info->query_string;
     23:   return 1; /* Mongoose will now not handle the request */
     24: }

     26: /*
     27:     Box can only return an authorization code to a Webserver, hence we need to start one up and wait for
     28:     the authorization code to arrive from Box
     29: */
     30: static PetscErrorCode PetscBoxStartWebServer_Private(void)
     31: {
     32:   int                 optionsLen = 5;
     33:   const char         *options[optionsLen];
     34:   struct mg_callbacks callbacks;
     35:   struct mg_context  *ctx;
     36:   char                keyfile[PETSC_MAX_PATH_LEN];
     37:   PetscBool           exists;

     39:   PetscFunctionBegin;
     40:   options[0] = "listening_ports";
     41:   options[1] = "8081s";

     43:   PetscCall(PetscStrncpy(keyfile, "sslclient.pem", sizeof(keyfile)));
     44:   PetscCall(PetscTestFile(keyfile, 'r', &exists));
     45:   if (!exists) {
     46:     PetscCall(PetscGetHomeDirectory(keyfile, PETSC_MAX_PATH_LEN));
     47:     PetscCall(PetscStrlcat(keyfile, "/", sizeof(keyfile)));
     48:     PetscCall(PetscStrlcat(keyfile, "sslclient.pem", sizeof(keyfile)));
     49:     PetscCall(PetscTestFile(keyfile, 'r', &exists));
     50:     PetscCheck(exists, PETSC_COMM_SELF, PETSC_ERR_FILE_OPEN, "Unable to locate sslclient.pem file in current directory or home directory");
     51:   }

     53:   options[2] = "ssl_certificate";
     54:   options[3] = keyfile;
     55:   options[4] = NULL;

     57:   /* Prepare callbacks structure. We have only one callback, the rest are NULL. */
     58:   PetscCall(PetscMemzero(&callbacks, sizeof(callbacks)));
     59:   callbacks.begin_request = PetscBoxWebServer_Private;
     60:   ctx                     = mg_start(&callbacks, NULL, options);
     61:   PetscCheck(ctx, PETSC_COMM_SELF, PETSC_ERR_LIB, "Unable to start up webserver");
     62:   while (!result) { };
     63:   PetscFunctionReturn(PETSC_SUCCESS);
     64: }

     66:   #if defined(PETSC_HAVE_UNISTD_H)
     67:     #include <unistd.h>
     68:   #endif

     70: /*@C
     71:   PetscBoxAuthorize - Get authorization and refresh token for accessing Box drive from PETSc

     73:   Not Collective, only the first rank in `MPI_Comm` does anything

     75:   Input Parameters:
     76: + comm      - the MPI communicator
     77: - tokensize - size of the token arrays

     79:   Output Parameters:
     80: + access_token  - can be used with `PetscBoxUpload()` for this one session
     81: - refresh_token - can be used for ever to obtain new access_tokens with `PetscBoxRefresh()`,
     82:                   guard this like a password  it gives access to your Box Drive

     84:   Level: intermediate

     86:   Notes:
     87:   This call requires `stdout` and `stdin` access from process 0 on the MPI communicator

     89:   You can run src/sys/webclient/tutorials/boxobtainrefreshtoken to get a refresh token and then
     90:   in the future pass it to PETSc programs with `-box_refresh_token XXX`

     92:   This requires PETSc be installed using `--with-saws` or `--download-saws`

     94:   Requires the user have created a self-signed ssl certificate with
     95: .vb
     96:   saws/CA.pl  -newcert  (using the passphrase of password)
     97:   cat newkey.pem newcert.pem > sslclient.pem
     98: .ve
     99:   and put the resulting file in either the current directory (with the application) or in the
    100:   home directory. This seems kind of silly but it was all I could figure out.

    102: .seealso: `PetscBoxRefresh()`, `PetscBoxUpload()`
    103: @*/
    104: PetscErrorCode PetscBoxAuthorize(MPI_Comm comm, char access_token[], char refresh_token[], size_t tokensize)
    105: {
    106:   SSL_CTX    *ctx;
    107:   SSL        *ssl;
    108:   int         sock;
    109:   char        buff[8 * 1024], body[1024];
    110:   PetscMPIInt rank;
    111:   PetscBool   flg, found;

    113:   PetscFunctionBegin;
    114:   PetscCallMPI(MPI_Comm_rank(comm, &rank));
    115:   if (rank == 0) {
    116:     PetscCheck(isatty(fileno(PETSC_STDOUT)), PETSC_COMM_SELF, PETSC_ERR_USER, "Requires users input/output");
    117:     PetscCall(PetscPrintf(comm, "Cut and paste the following into your browser:\n\n"
    118:                                 "https://www.box.com/api/oauth2/authorize?"
    119:                                 "response_type=code&"
    120:                                 "client_id=" PETSC_BOX_CLIENT_ID "&state=PETScState"
    121:                                 "\n\n"));
    122:     PetscCall(PetscBoxStartWebServer_Private());
    123:     PetscCall(PetscStrbeginswith((const char *)result, "state=PETScState&code=", &flg));
    124:     PetscCheck(flg, PETSC_COMM_SELF, PETSC_ERR_LIB, "Did not get expected string from Box got %s", result);
    125:     PetscCall(PetscStrncpy(buff, (const char *)result + 22, sizeof(buff)));

    127:     PetscCall(PetscSSLInitializeContext(&ctx));
    128:     PetscCall(PetscHTTPSConnect("www.box.com", 443, ctx, &sock, &ssl));
    129:     PetscCall(PetscStrncpy(body, "code=", sizeof(body)));
    130:     PetscCall(PetscStrlcat(body, buff, sizeof(body)));
    131:     PetscCall(PetscStrlcat(body, "&client_id=", sizeof(body)));
    132:     PetscCall(PetscStrlcat(body, PETSC_BOX_CLIENT_ID, sizeof(body)));
    133:     PetscCall(PetscStrlcat(body, "&client_secret=", sizeof(body)));
    134:     PetscCall(PetscStrlcat(body, PETSC_BOX_CLIENT_ST, sizeof(body)));
    135:     PetscCall(PetscStrlcat(body, "&grant_type=authorization_code", sizeof(body)));

    137:     PetscCall(PetscHTTPSRequest("POST", "www.box.com/api/oauth2/token", NULL, "application/x-www-form-urlencoded", body, ssl, buff, sizeof(buff)));
    138:     PetscCall(PetscSSLDestroyContext(ctx));
    139:     close(sock);

    141:     PetscCall(PetscPullJSONValue(buff, "access_token", access_token, tokensize, &found));
    142:     PetscCheck(found, PETSC_COMM_SELF, PETSC_ERR_LIB, "Box did not return access token");
    143:     PetscCall(PetscPullJSONValue(buff, "refresh_token", refresh_token, tokensize, &found));
    144:     PetscCheck(found, PETSC_COMM_SELF, PETSC_ERR_LIB, "Box did not return refresh token");

    146:     PetscCall(PetscPrintf(comm, "Here is your Box refresh token, save it in a save place, in the future you can run PETSc\n"));
    147:     PetscCall(PetscPrintf(comm, "programs with the option -box_refresh_token %s\n", refresh_token));
    148:     PetscCall(PetscPrintf(comm, "to access Box Drive automatically\n"));
    149:   }
    150:   PetscFunctionReturn(PETSC_SUCCESS);
    151: }
    152: #endif

    154: /*@C
    155:   PetscBoxRefresh - Get a new authorization token for accessing Box drive from PETSc from a refresh token

    157:   Not Collective, only the first process in the `MPI_Comm` does anything

    159:   Input Parameters:
    160: + comm          - MPI communicator
    161: . refresh_token - obtained with `PetscBoxAuthorize()`, if `NULL` PETSc will first look for one in the options data
    162:                     if not found it will call `PetscBoxAuthorize()`
    163: - tokensize     - size of the output string access_token

    165:   Output Parameters:
    166: + access_token      - token that can be passed to `PetscBoxUpload()`
    167: - new_refresh_token - the old refresh token is no longer valid, not this is different than Google where the same refresh_token is used forever

    169:   Level: intermediate

    171: .seealso: `PetscBoxAuthorize()`, `PetscBoxUpload()`
    172: @*/
    173: PetscErrorCode PetscBoxRefresh(MPI_Comm comm, const char refresh_token[], char access_token[], char new_refresh_token[], size_t tokensize)
    174: {
    175:   SSL_CTX    *ctx;
    176:   SSL        *ssl;
    177:   int         sock;
    178:   char        buff[8 * 1024], body[1024];
    179:   PetscMPIInt rank;
    180:   char       *refreshtoken = (char *)refresh_token;
    181:   PetscBool   found;

    183:   PetscFunctionBegin;
    184:   PetscCallMPI(MPI_Comm_rank(comm, &rank));
    185:   if (rank == 0) {
    186:     if (!refresh_token) {
    187:       PetscBool set;
    188:       PetscCall(PetscMalloc1(512, &refreshtoken));
    189:       PetscCall(PetscOptionsGetString(NULL, NULL, "-box_refresh_token", refreshtoken, sizeof(refreshtoken), &set));
    190: #if defined(PETSC_HAVE_SAWS)
    191:       if (!set) {
    192:         PetscCall(PetscBoxAuthorize(comm, access_token, new_refresh_token, 512 * sizeof(char)));
    193:         PetscCall(PetscFree(refreshtoken));
    194:         PetscFunctionReturn(PETSC_SUCCESS);
    195:       }
    196: #else
    197:       PetscCheck(set, PETSC_COMM_SELF, PETSC_ERR_LIB, "Must provide refresh token with -box_refresh_token XXX");
    198: #endif
    199:     }
    200:     PetscCall(PetscSSLInitializeContext(&ctx));
    201:     PetscCall(PetscHTTPSConnect("www.box.com", 443, ctx, &sock, &ssl));
    202:     PetscCall(PetscStrncpy(body, "client_id=", sizeof(body)));
    203:     PetscCall(PetscStrlcat(body, PETSC_BOX_CLIENT_ID, sizeof(body)));
    204:     PetscCall(PetscStrlcat(body, "&client_secret=", sizeof(body)));
    205:     PetscCall(PetscStrlcat(body, PETSC_BOX_CLIENT_ST, sizeof(body)));
    206:     PetscCall(PetscStrlcat(body, "&refresh_token=", sizeof(body)));
    207:     PetscCall(PetscStrlcat(body, refreshtoken, sizeof(body)));
    208:     if (!refresh_token) PetscCall(PetscFree(refreshtoken));
    209:     PetscCall(PetscStrlcat(body, "&grant_type=refresh_token", sizeof(body)));

    211:     PetscCall(PetscHTTPSRequest("POST", "www.box.com/api/oauth2/token", NULL, "application/x-www-form-urlencoded", body, ssl, buff, sizeof(buff)));
    212:     PetscCall(PetscSSLDestroyContext(ctx));
    213:     close(sock);

    215:     PetscCall(PetscPullJSONValue(buff, "access_token", access_token, tokensize, &found));
    216:     PetscCheck(found, PETSC_COMM_SELF, PETSC_ERR_LIB, "Box did not return access token");
    217:     PetscCall(PetscPullJSONValue(buff, "refresh_token", new_refresh_token, tokensize, &found));
    218:     PetscCheck(found, PETSC_COMM_SELF, PETSC_ERR_LIB, "Box did not return refresh token");

    220:     PetscCall(PetscPrintf(comm, "Here is your new Box refresh token, save it in a save place, in the future you can run PETSc\n"));
    221:     PetscCall(PetscPrintf(comm, "programs with the option -box_refresh_token %s\n", new_refresh_token));
    222:     PetscCall(PetscPrintf(comm, "to access Box Drive automatically\n"));
    223:   }
    224:   PetscFunctionReturn(PETSC_SUCCESS);
    225: }

    227: #include <sys/stat.h>

    229: /*@C
    230:   PetscBoxUpload - Loads a file to the Box Drive

    232:   This routine has not yet been written; it is just copied from Google Drive

    234:   Not collective, only the first process in the `MPI_Comm` uploads the file

    236:   Input Parameters:
    237: + comm         - MPI communicator
    238: . access_token - obtained with `PetscBoxRefresh()`, pass `NULL` to have PETSc generate one
    239: - filename     - file to upload; if you upload multiple times it will have different names each time on Box Drive

    241:   Options Database Key:
    242: . -box_refresh_token XXX - the token value

    244:   Example Usage:
    245: .vb
    246:     With PETSc option -box_refresh_token XXX given
    247:     PetscBoxUpload(comm,NULL,filename);        will upload file with no user interaction

    249:     Without PETSc option -box_refresh_token XXX given
    250:     PetscBoxUpload(comm,NULL,filename);        for first use will prompt user to authorize access to Box Drive with their processor

    252:     With PETSc option -box_refresh_token  XXX given
    253:     PetscBoxRefresh(comm,NULL,access_token,sizeof(access_token));
    254:     PetscBoxUpload(comm,access_token,filename);

    256:     With refresh token entered in some way by the user
    257:     PetscBoxRefresh(comm,refresh_token,access_token,sizeof(access_token));
    258:     PetscBoxUpload(comm,access_token,filename);

    260:     PetscBoxAuthorize(comm,access_token,refresh_token,sizeof(access_token));
    261:     PetscBoxUpload(comm,access_token,filename);
    262: .ve

    264:   Level: intermediate

    266: .seealso: `PetscBoxAuthorize()`, `PetscBoxRefresh()`
    267: @*/
    268: PetscErrorCode PetscBoxUpload(MPI_Comm comm, const char access_token[], const char filename[])
    269: {
    270:   SSL_CTX    *ctx;
    271:   SSL        *ssl;
    272:   int         sock;
    273:   char        head[1024], buff[8 * 1024], *body, *title;
    274:   PetscMPIInt rank;
    275:   struct stat sb;
    276:   size_t      len, blen, rd;
    277:   FILE       *fd;
    278:   int         err;

    280:   PetscFunctionBegin;
    281:   PetscCallMPI(MPI_Comm_rank(comm, &rank));
    282:   if (rank == 0) {
    283:     PetscCall(PetscStrncpy(head, "Authorization: Bearer ", sizeof(head)));
    284:     PetscCall(PetscStrlcat(head, access_token, sizeof(head)));
    285:     PetscCall(PetscStrlcat(head, "\r\n", sizeof(head)));
    286:     PetscCall(PetscStrlcat(head, "uploadType: multipart\r\n", sizeof(head)));

    288:     err = stat(filename, &sb);
    289:     PetscCheck(!err, PETSC_COMM_SELF, PETSC_ERR_FILE_OPEN, "Unable to stat file: %s", filename);
    290:     len = 1024 + sb.st_size;
    291:     PetscCall(PetscMalloc1(len, &body));
    292:     PetscCall(PetscStrncpy(body,
    293:                            "--foo_bar_baz\r\n"
    294:                            "Content-Type: application/json\r\n\r\n"
    295:                            "{",
    296:                            len));
    297:     PetscCall(PetscPushJSONValue(body, "title", filename, len));
    298:     PetscCall(PetscStrlcat(body, ",", len));
    299:     PetscCall(PetscPushJSONValue(body, "mimeType", "text.html", len));
    300:     PetscCall(PetscStrlcat(body, ",", len));
    301:     PetscCall(PetscPushJSONValue(body, "description", "a file", len));
    302:     PetscCall(PetscStrlcat(body,
    303:                            "}\r\n\r\n"
    304:                            "--foo_bar_baz\r\n"
    305:                            "Content-Type: text/html\r\n\r\n",
    306:                            len));
    307:     PetscCall(PetscStrlen(body, &blen));
    308:     fd = fopen(filename, "r");
    309:     PetscCheck(fd, PETSC_COMM_SELF, PETSC_ERR_FILE_OPEN, "Unable to open file: %s", filename);
    310:     rd = fread(body + blen, sizeof(unsigned char), sb.st_size, fd);
    311:     PetscCheck(rd == (size_t)sb.st_size, PETSC_COMM_SELF, PETSC_ERR_FILE_OPEN, "Unable to read entire file: %s %d %d", filename, (int)rd, (int)sb.st_size);
    312:     fclose(fd);
    313:     body[blen + rd] = 0;
    314:     PetscCall(PetscStrlcat(body,
    315:                            "\r\n\r\n"
    316:                            "--foo_bar_baz\r\n",
    317:                            len));
    318:     PetscCall(PetscSSLInitializeContext(&ctx));
    319:     PetscCall(PetscHTTPSConnect("www.boxapis.com", 443, ctx, &sock, &ssl));
    320:     PetscCall(PetscHTTPSRequest("POST", "www.boxapis.com/upload/drive/v2/files/", head, "multipart/related; boundary=\"foo_bar_baz\"", body, ssl, buff, sizeof(buff)));
    321:     PetscCall(PetscFree(body));
    322:     PetscCall(PetscSSLDestroyContext(ctx));
    323:     close(sock);
    324:     PetscCall(PetscStrstr(buff, "\"title\"", &title));
    325:     PetscCheck(title, PETSC_COMM_SELF, PETSC_ERR_LIB, "Upload of file %s failed", filename);
    326:   }
    327:   PetscFunctionReturn(PETSC_SUCCESS);
    328: }