xref: /petsc/src/sys/webclient/globus.c (revision 20f4b53cbb5e9bd9ef12b76a8697d60d197cda17)

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

/*
    Encodes and decodes from MIME Base64
*/
static char encoding_table[] = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
                                'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/'};

static PetscErrorCode base64_encode(const unsigned char *data, unsigned char *encoded_data, size_t len)
{
  static size_t mod_table[] = {0, 2, 1};
  size_t        i, j;
  size_t        input_length, output_length;

  PetscFunctionBegin;
  PetscCall(PetscStrlen((const char *)data, &input_length));
  output_length = 4 * ((input_length + 2) / 3);
  PetscCheck(output_length <= len, PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Output length not large enough");

  for (i = 0, j = 0; i < input_length;) {
    uint32_t octet_a = i < input_length ? (unsigned char)data[i++] : 0;
    uint32_t octet_b = i < input_length ? (unsigned char)data[i++] : 0;
    uint32_t octet_c = i < input_length ? (unsigned char)data[i++] : 0;
    uint32_t triple  = (octet_a << 0x10) + (octet_b << 0x08) + octet_c;

    encoded_data[j++] = encoding_table[(triple >> 3 * 6) & 0x3F];
    encoded_data[j++] = encoding_table[(triple >> 2 * 6) & 0x3F];
    encoded_data[j++] = encoding_table[(triple >> 1 * 6) & 0x3F];
    encoded_data[j++] = encoding_table[(triple >> 0 * 6) & 0x3F];
  }
  encoded_data[j] = 0;
  for (i = 0; i < mod_table[input_length % 3]; i++) encoded_data[output_length - 1 - i] = '=';
  PetscFunctionReturn(PETSC_SUCCESS);
}

PETSC_UNUSED static PetscErrorCode base64_decode(const unsigned char *data, unsigned char *decoded_data, size_t length)
{
  static char decoding_table[257];
  static int  decode_table_built = 0;
  size_t      i, j;
  size_t      input_length, output_length;

  PetscFunctionBegin;
  if (!decode_table_built) {
    for (i = 0; i < 64; i++) decoding_table[(unsigned char)encoding_table[i]] = i;
    decode_table_built = 1;
  }

  PetscCall(PetscStrlen((const char *)data, &input_length));
  PetscCheck(input_length % 4 == 0, PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Input length must be divisible by 4");

  output_length = input_length / 4 * 3;
  if (data[input_length - 1] == '=') (output_length)--;
  if (data[input_length - 2] == '=') (output_length)--;
  PetscCheck(output_length <= length, PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Output length too shore");

  for (i = 0, j = 0; i < input_length;) {
    uint32_t sextet_a = data[i] == '=' ? 0 & i++ : decoding_table[(int)data[i++]];
    uint32_t sextet_b = data[i] == '=' ? 0 & i++ : decoding_table[(int)data[i++]];
    uint32_t sextet_c = data[i] == '=' ? 0 & i++ : decoding_table[(int)data[i++]];
    uint32_t sextet_d = data[i] == '=' ? 0 & i++ : decoding_table[(int)data[i++]];
    uint32_t triple   = (sextet_a << 3 * 6) + (sextet_b << 2 * 6) + (sextet_c << 1 * 6) + (sextet_d << 0 * 6);

    if (j < output_length) decoded_data[j++] = (triple >> 2 * 8) & 0xFF;
    if (j < output_length) decoded_data[j++] = (triple >> 1 * 8) & 0xFF;
    if (j < output_length) decoded_data[j++] = (triple >> 0 * 8) & 0xFF;
  }
  decoded_data[j] = 0;
  PetscFunctionReturn(PETSC_SUCCESS);
}

#if defined(PETSC_HAVE_UNISTD_H)
  #include <unistd.h>
#endif

/*@C
     PetscGlobusAuthorize - Get an access token allowing PETSc applications to make Globus file transfer requests

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

   Input Parameters:
+  comm - the MPI communicator
-  tokensize - size of the token array

   Output Parameters:
.  access_token - can be used with `PetscGlobusUpLoad()` for 30 days

   Level: intermediate

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

   You can run src/sys/webclient/tutorials/globusobtainaccesstoken to get an access token

.seealso: `PetscGoogleDriveRefresh()`, `PetscGoogleDriveUpload()`, `PetscURLShorten()`, `PetscGlobusUpload()`
@*/
PetscErrorCode PetscGlobusAuthorize(MPI_Comm comm, char access_token[], size_t tokensize)
{
  SSL_CTX    *ctx;
  SSL        *ssl;
  int         sock;
  char        buff[8 * 1024], *ptr, head[1024];
  PetscMPIInt rank;
  size_t      len;
  PetscBool   found;

  PetscFunctionBegin;
  PetscCallMPI(MPI_Comm_rank(comm, &rank));
  if (rank == 0) {
    PetscCheck(isatty(fileno(PETSC_STDOUT)), PETSC_COMM_SELF, PETSC_ERR_USER, "Requires users input/output");
    PetscCall(PetscPrintf(comm, "Enter globus username:"));
    ptr = fgets(buff, 1024, stdin);
    PetscCheck(ptr, PETSC_COMM_SELF, PETSC_ERR_FILE_READ, "Error reading from stdin: %d", errno);
    PetscCall(PetscStrlen(buff, &len));
    buff[len - 1] = ':'; /* remove carriage return at end of line */

    PetscCall(PetscPrintf(comm, "Enter globus password:"));
    ptr = fgets(buff + len, 1024 - len, stdin);
    PetscCheck(ptr, PETSC_COMM_SELF, PETSC_ERR_FILE_READ, "Error reading from stdin: %d", errno);
    PetscCall(PetscStrlen(buff, &len));
    buff[len - 1] = '\0'; /* remove carriage return at end of line */
    PetscCall(PetscStrncpy(head, "Authorization: Basic ", sizeof(head)));
    PetscCall(base64_encode((const unsigned char *)buff, (unsigned char *)(head + 21), sizeof(head) - 21));
    PetscCall(PetscStrlcat(head, "\r\n", sizeof(head)));

    PetscCall(PetscSSLInitializeContext(&ctx));
    PetscCall(PetscHTTPSConnect("nexus.api.globusonline.org", 443, ctx, &sock, &ssl));
    PetscCall(PetscHTTPSRequest("GET", "nexus.api.globusonline.org/goauth/token?grant_type=client_credentials", head, "application/x-www-form-urlencoded", NULL, ssl, buff, sizeof(buff)));
    PetscCall(PetscSSLDestroyContext(ctx));
    close(sock);

    PetscCall(PetscPullJSONValue(buff, "access_token", access_token, tokensize, &found));
    PetscCheck(found, PETSC_COMM_SELF, PETSC_ERR_LIB, "Globus did not return access token");

    PetscCall(PetscPrintf(comm, "Here is your Globus access token, save it in a save place, in the future you can run PETSc\n"));
    PetscCall(PetscPrintf(comm, "programs with the option -globus_access_token %s\n", access_token));
    PetscCall(PetscPrintf(comm, "to access Globus automatically\n"));
  }
  PetscFunctionReturn(PETSC_SUCCESS);
}

/*@C
     PetscGlobusGetTransfers - Get a record of current transfers requested from Globus

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

   Input Parameters:
+  comm - the MPI communicator
.  access_token - Globus access token, if `NULL` will check in options database for -globus_access_token XXX otherwise
                  will call `PetscGlobusAuthorize()`.
-  buffsize - size of the buffer

   Output Parameters:
.  buff - location to put Globus information

   Level: intermediate

.seealso: `PetscGoogleDriveRefresh()`, `PetscGoogleDriveUpload()`, `PetscURLShorten()`, `PetscGlobusUpload()`, `PetscGlobusAuthorize()`
@*/
PetscErrorCode PetscGlobusGetTransfers(MPI_Comm comm, const char access_token[], char buff[], size_t buffsize)
{
  SSL_CTX    *ctx;
  SSL        *ssl;
  int         sock;
  char        head[4096];
  PetscMPIInt rank;

  PetscFunctionBegin;
  PetscCallMPI(MPI_Comm_rank(comm, &rank));
  if (rank == 0) {
    PetscCall(PetscStrncpy(head, "Authorization : Globus-Goauthtoken ", sizeof(head)));
    if (access_token) {
      PetscCall(PetscStrlcat(head, access_token, sizeof(head)));
    } else {
      PetscBool set;
      char      accesstoken[4096];
      PetscCall(PetscOptionsGetString(NULL, NULL, "-globus_access_token", accesstoken, sizeof(accesstoken), &set));
      PetscCheck(set, PETSC_COMM_SELF, PETSC_ERR_USER, "Pass in Globus accesstoken or use -globus_access_token XXX");
      PetscCall(PetscStrlcat(head, accesstoken, sizeof(head)));
    }
    PetscCall(PetscStrlcat(head, "\r\n", sizeof(head)));

    PetscCall(PetscSSLInitializeContext(&ctx));
    PetscCall(PetscHTTPSConnect("transfer.api.globusonline.org", 443, ctx, &sock, &ssl));
    PetscCall(PetscHTTPSRequest("GET", "transfer.api.globusonline.org/v0.10/tasksummary", head, "application/json", NULL, ssl, buff, buffsize));
    PetscCall(PetscSSLDestroyContext(ctx));
    close(sock);
  }
  PetscFunctionReturn(PETSC_SUCCESS);
}

/*@C
     PetscGlobusUpload - Loads a file to Globus

     Not Collective, only the first process in the `MPI_Comm` uploads the file

  Input Parameters:
+   comm - MPI communicator
.   access_token - obtained with `PetscGlobusAuthorize()`, pass `NULL` to use `-globus_access_token XXX` from the PETSc database
-   filename - file to upload

  Options Database Key:
.  -globus_access_token XXX - the Globus token

   Level: intermediate

.seealso: `PetscURLShorten()`, `PetscGoogleDriveAuthorize()`, `PetscGoogleDriveRefresh()`, `PetscGlobusAuthorize()`
@*/
PetscErrorCode PetscGlobusUpload(MPI_Comm comm, const char access_token[], const char filename[])
{
  SSL_CTX    *ctx;
  SSL        *ssl;
  int         sock;
  char        head[4096], buff[8 * 1024], body[4096], submission_id[4096];
  PetscMPIInt rank;
  PetscBool   flg, found;

  PetscFunctionBegin;
  PetscCallMPI(MPI_Comm_rank(comm, &rank));
  if (rank == 0) {
    PetscCall(PetscTestFile(filename, 'r', &flg));
    PetscCheck(flg, PETSC_COMM_SELF, PETSC_ERR_FILE_OPEN, "Unable to find file: %s", filename);

    PetscCall(PetscStrncpy(head, "Authorization : Globus-Goauthtoken ", sizeof(head)));
    if (access_token) {
      PetscCall(PetscStrlcat(head, access_token, sizeof(head)));
    } else {
      PetscBool set;
      char      accesstoken[4096];
      PetscCall(PetscOptionsGetString(NULL, NULL, "-globus_access_token", accesstoken, sizeof(accesstoken), &set));
      PetscCheck(set, PETSC_COMM_SELF, PETSC_ERR_USER, "Pass in Globus accesstoken or use -globus_access_token XXX");
      PetscCall(PetscStrlcat(head, accesstoken, sizeof(head)));
    }
    PetscCall(PetscStrlcat(head, "\r\n", sizeof(head)));

    /* Get Globus submission id */
    PetscCall(PetscSSLInitializeContext(&ctx));
    PetscCall(PetscHTTPSConnect("transfer.api.globusonline.org", 443, ctx, &sock, &ssl));
    PetscCall(PetscHTTPSRequest("GET", "transfer.api.globusonline.org/v0.10/submission_id", head, "application/json", NULL, ssl, buff, sizeof(buff)));
    PetscCall(PetscSSLDestroyContext(ctx));
    close(sock);
    PetscCall(PetscPullJSONValue(buff, "value", submission_id, sizeof(submission_id), &found));
    PetscCheck(found, PETSC_COMM_SELF, PETSC_ERR_LIB, "Globus did not return submission id");

    /* build JSON body of transfer request */
    PetscCall(PetscStrncpy(body, "{", sizeof(body)));
    PetscCall(PetscPushJSONValue(body, "submission_id", submission_id, sizeof(body)));
    PetscCall(PetscStrlcat(body, ",", sizeof(body)));
    PetscCall(PetscPushJSONValue(body, "DATA_TYPE", "transfer", sizeof(body)));
    PetscCall(PetscStrlcat(body, ",", sizeof(body)));
    PetscCall(PetscPushJSONValue(body, "sync_level", "null", sizeof(body)));
    PetscCall(PetscStrlcat(body, ",", sizeof(body)));
    PetscCall(PetscPushJSONValue(body, "source_endpoint", "barryfsmith#MacBookPro", sizeof(body)));
    PetscCall(PetscStrlcat(body, ",", sizeof(body)));
    PetscCall(PetscPushJSONValue(body, "label", "PETSc transfer label", sizeof(body)));
    PetscCall(PetscStrlcat(body, ",", sizeof(body)));
    PetscCall(PetscPushJSONValue(body, "length", "1", sizeof(body)));
    PetscCall(PetscStrlcat(body, ",", sizeof(body)));
    PetscCall(PetscPushJSONValue(body, "destination_endpoint", "mcs#home", sizeof(body)));
    PetscCall(PetscStrlcat(body, ",", sizeof(body)));

    PetscCall(PetscStrlcat(body, "\"DATA\": [ {", sizeof(body)));
    PetscCall(PetscPushJSONValue(body, "source_path", "/~/FEM_GPU.pdf", sizeof(body)));
    PetscCall(PetscStrlcat(body, ",", sizeof(body)));
    PetscCall(PetscPushJSONValue(body, "destination_path", "/~/FEM_GPU.pdf", sizeof(body)));
    PetscCall(PetscStrlcat(body, ",", sizeof(body)));
    PetscCall(PetscPushJSONValue(body, "verify_size", "null", sizeof(body)));
    PetscCall(PetscStrlcat(body, ",", sizeof(body)));
    PetscCall(PetscPushJSONValue(body, "recursive", "false", sizeof(body)));
    PetscCall(PetscStrlcat(body, ",", sizeof(body)));
    PetscCall(PetscPushJSONValue(body, "DATA_TYPE", "transfer_item", sizeof(body)));
    PetscCall(PetscStrlcat(body, "} ] }", sizeof(body)));

    PetscCall(PetscSSLInitializeContext(&ctx));
    PetscCall(PetscHTTPSConnect("transfer.api.globusonline.org", 443, ctx, &sock, &ssl));
    PetscCall(PetscHTTPSRequest("POST", "transfer.api.globusonline.org/v0.10/transfer", head, "application/json", body, ssl, buff, sizeof(buff)));
    PetscCall(PetscSSLDestroyContext(ctx));
    close(sock);
    PetscCall(PetscPullJSONValue(buff, "code", submission_id, sizeof(submission_id), &found));
    PetscCheck(found, PETSC_COMM_SELF, PETSC_ERR_LIB, "Globus did not return code on transfer");
    PetscCall(PetscStrcmp(submission_id, "Accepted", &found));
    PetscCheck(found, PETSC_COMM_SELF, PETSC_ERR_LIB, "Globus did not accept transfer");
  }
  PetscFunctionReturn(PETSC_SUCCESS);
}