XrdHttpUtils.hh File Reference

Utility functions for XrdHTTP. More...

#include "XProtocol/XPtypes.hh"
#include "XrdSec/XrdSecEntity.hh"
#include "XrdOuc/XrdOucIOVec.hh"
#include <string>
#include <vector>

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Typedefs
typedef std::vector< XrdOucIOVec2 >	XrdHttpIOList

Functions
void	calcHashes (char *hash, const char *fn, kXR_int16 req, XrdSecEntity *secent, time_t tim, const char *key)
int	compareHash (const char *h1, const char *h2)
char *	escapeXML (const char *str)
bool	Fromhexdigest (const unsigned char *input, int length, unsigned char *out)
std::string	itos (long i)
char *	mystrchrnul (const char *s, int c)
int	parseURL (char *url, char *host, int &port, char **path)
char *	quote (const char *str)
void	Tobase64 (const unsigned char *input, int length, char *out)
char *	unquote (char *str)

Detailed Description

Utility functions for XrdHTTP.

Author

Fabrizio Furano

Date

April 2013

Definition in file XrdHttpUtils.hh.

Typedef Documentation

XrdHttpIOList

typedef std::vector<XrdOucIOVec2> XrdHttpIOList

Definition at line 95 of file XrdHttpUtils.hh.

Function Documentation

calcHashes()

void calcHashes	(	char *	hash,
		const char *	fn,
		kXR_int16	req,
		XrdSecEntity *	secent,
		time_t	tim,
		const char *	key )

Definition at line 219 of file XrdHttpUtils.cc.

                         {
 
 
#if OPENSSL_VERSION_NUMBER >= 0x30000000L
  EVP_MAC *mac;
  EVP_MAC_CTX *ctx;
  size_t len;
#else
  HMAC_CTX *ctx;
  unsigned int len;
#endif
  unsigned char mdbuf[EVP_MAX_MD_SIZE];
  char buf[64];
  struct tm tms;
 
 
  if (!hash) {
    return;
  }
  hash[0] = '\0';
  
  if (!key) {
    return;
  }
 
  if (!fn || !secent) {
    return;
  }
 
#if OPENSSL_VERSION_NUMBER >= 0x30000000L
 
  mac = EVP_MAC_fetch(0, "sha256", 0);
  ctx = EVP_MAC_CTX_new(mac);
 
  if (!ctx) {
     return;
  }
 
 
  EVP_MAC_init(ctx, (const unsigned char *) key, strlen(key), 0);
 
 
  if (fn)
    EVP_MAC_update(ctx, (const unsigned char *) fn,
          strlen(fn) + 1);
 
  EVP_MAC_update(ctx, (const unsigned char *) &request,
          sizeof (request));
 
  if (secent->name)
    EVP_MAC_update(ctx, (const unsigned char *) secent->name,
          strlen(secent->name) + 1);
 
  if (secent->vorg)
    EVP_MAC_update(ctx, (const unsigned char *) secent->vorg,
          strlen(secent->vorg) + 1);
 
  if (secent->host)
    EVP_MAC_update(ctx, (const unsigned char *) secent->host,
          strlen(secent->host) + 1);
 
  if (secent->moninfo)
    EVP_MAC_update(ctx, (const unsigned char *) secent->moninfo,
          strlen(secent->moninfo) + 1);
 
  localtime_r(&tim, &tms);
  strftime(buf, sizeof (buf), "%s", &tms);
  EVP_MAC_update(ctx, (const unsigned char *) buf,
          strlen(buf) + 1);
 
  EVP_MAC_final(ctx, mdbuf, &len, EVP_MAX_MD_SIZE);
 
  EVP_MAC_CTX_free(ctx);
  EVP_MAC_free(mac);
 
#else
 
  ctx = HMAC_CTX_new();
 
  if (!ctx) {
    return;
  }
 
 
 
  HMAC_Init_ex(ctx, (const void *) key, strlen(key), EVP_sha256(), 0);
 
 
  if (fn)
    HMAC_Update(ctx, (const unsigned char *) fn,
          strlen(fn) + 1);
 
  HMAC_Update(ctx, (const unsigned char *) &request,
          sizeof (request));
 
  if (secent->name)
    HMAC_Update(ctx, (const unsigned char *) secent->name,
          strlen(secent->name) + 1);
 
  if (secent->vorg)
    HMAC_Update(ctx, (const unsigned char *) secent->vorg,
          strlen(secent->vorg) + 1);
 
  if (secent->host)
    HMAC_Update(ctx, (const unsigned char *) secent->host,
          strlen(secent->host) + 1);
 
  if (secent->moninfo)
    HMAC_Update(ctx, (const unsigned char *) secent->moninfo,
          strlen(secent->moninfo) + 1);
 
  localtime_r(&tim, &tms);
  strftime(buf, sizeof (buf), "%s", &tms);
  HMAC_Update(ctx, (const unsigned char *) buf,
          strlen(buf) + 1);
 
  HMAC_Final(ctx, mdbuf, &len);
 
  HMAC_CTX_free(ctx);
 
#endif
 
  Tobase64(mdbuf, len / 2, hash);
}

References HMAC_CTX_free(), HMAC_CTX_new(), XrdSecEntity::host, XrdSecEntity::moninfo, XrdSecEntity::name, Tobase64(), and XrdSecEntity::vorg.

Referenced by XrdHttpProtocol::Process(), and XrdHttpReq::Redir().

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compareHash()

int compareHash	(	const char *	h1,
		const char *	h2 )

Definition at line 355 of file XrdHttpUtils.cc.

                        {
 
  if (h1 == h2) return 0;
 
  if (!h1 || !h2)
    return 1;
 
  return strcmp(h1, h2);
 
}

Referenced by XrdHttpProtocol::Process().

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escapeXML()

char * escapeXML

(

const char *

str

)

Definition at line 455 of file XrdHttpUtils.cc.

                                 {
  int l = strlen(str);
  char *r = (char *) malloc(l*6 + 1);
  r[0] = '\0';
  int i, j = 0;
  
  for (i = 0; i < l; i++) {
    char c = str[i];
    
    switch (c) {
      case '"':
        strcpy(r + j, "&quot;");
        j += 6;
        break;
      case '&':
        strcpy(r + j, "&amp;");
        j += 5;
        break;
      case '<':
        strcpy(r + j, "&lt;");
        j += 4;
        break;
      case '>':
        strcpy(r + j, "&gt;");
        j += 4;
        break;
      case '\'':
        strcpy(r + j, "&apos;");
        j += 6;
        break;
      
      default:
        r[j++] = c;
    }
  }
  
  r[j] = '\0';
  
  return r;
}

Referenced by XrdHttpReq::Error().

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Fromhexdigest()

bool Fromhexdigest	(	const unsigned char *	input,
		int	length,
		unsigned char *	out )

Definition at line 169 of file XrdHttpUtils.cc.

                                                                               {
  for (int idx=0; idx < length; idx += 2) {
    int upper =  char_to_int(input[idx]);
    int lower =  char_to_int(input[idx+1]);
    if ((upper < 0) || (lower < 0)) {
      return false;
    }
    out[idx/2] = (upper << 4) + lower;
  }
  return true;
}

References char_to_int().

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itos()

std::string itos

(

long

i

)

Definition at line 183 of file XrdHttpUtils.cc.

                       {
  char buf[128];
  sprintf(buf, "%ld", i);
 
  return buf;
}

mystrchrnul()

char * mystrchrnul	(	const char *	s,
		int	c )

Definition at line 193 of file XrdHttpUtils.cc.

                                        {
  char *ptr = strchr((char *)s, c);
 
  if (!ptr)
    return strchr((char *)s, '\0');
 
  return ptr;
}

parseURL()

int parseURL	(	char *	url,
		char *	host,
		int &	port,
		char **	path )

Definition at line 77 of file XrdHttpUtils.cc.

                                                            {
  // http://x.y.z.w:p/path
 
  *path = 0;
 
  // look for the second slash
  char *p = strstr(url, "//");
  if (!p) return -1;
 
 
  p += 2;
 
  // look for the end of the host:port
  char *p2 = strchr(p, '/');
  if (!p2) return -1;
 
  *path = p2;
 
  char buf[256];
  int l = std::min((int)(p2 - p), (int)sizeof (buf));
  strncpy(buf, p, l);
  buf[l] = '\0';
 
  // Now look for :
  p = strchr(buf, ':');
  if (p) {
    int l = std::min((int)(p - buf), (int)sizeof (buf));
    strncpy(host, buf, l);
    host[l] = '\0';
 
    port = atoi(p + 1);
  } else {
    port = 0;
 
 
    strcpy(host, buf);
  }
 
  return 0;
}

Referenced by XrdHttpReq::ProcessHTTPReq().

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quote()

char * quote

(

const char *

str

)

Definition at line 404 of file XrdHttpUtils.cc.

                             {
  int l = strlen(str);
  char *r = (char *) malloc(l*3 + 1);
  r[0] = '\0';
  int i, j = 0;
 
  for (i = 0; i < l; i++) {
    char c = str[i];
 
    switch (c) {
      case ' ':
        strcpy(r + j, "%20");
        j += 3;
        break;
      case '[':
        strcpy(r + j, "%5B");
        j += 3;
        break;
      case ']':
        strcpy(r + j, "%5D");
        j += 3;
        break;
      case ':':
        strcpy(r + j, "%3A");
        j += 3;
        break;
      case '/':
        strcpy(r + j, "%2F");
        j += 3;
        break;
      case '\n':
        strcpy(r + j, "%0A");
        j += 3;
        break;
      case '\r':
        strcpy(r + j, "%0D");
        j += 3;
        break;
      default:
        r[j++] = c;
    }
  }
 
  r[j] = '\0';
 
  return r;
}

Referenced by XrdHttpReq::appendOpaque(), XrdHttpReq::ProcessHTTPReq(), and XrdHttpReq::Redir().

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Tobase64()

void Tobase64	(	const unsigned char *	input,
		int	length,
		char *	out )

Definition at line 121 of file XrdHttpUtils.cc.

                                                                 {
  BIO *bmem, *b64;
  BUF_MEM *bptr;
 
  if (!out) return;
 
  out[0] = '\0';
 
  b64 = BIO_new(BIO_f_base64());
  BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
  bmem = BIO_new(BIO_s_mem());
  BIO_push(b64, bmem);
  BIO_write(b64, input, length);
 
  if (BIO_flush(b64) <= 0) {
    BIO_free_all(b64);
    return;
  }
 
  BIO_get_mem_ptr(b64, &bptr);
 
 
  memcpy(out, bptr->data, bptr->length);
  out[bptr->length] = '\0';
 
  BIO_free_all(b64);
 
  return;
}

References BIO_set_flags().

Referenced by calcHashes().

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unquote()

char * unquote

(

char *

str

)

Definition at line 375 of file XrdHttpUtils.cc.

                         {
  int l = strlen(str);
  char *r = (char *) malloc(l + 1);
  r[0] = '\0';
  int i, j = 0;
 
  for (i = 0; i < l; i++) {
 
    if (str[i] == '%') {
      char savec = str[i + 3];
      str[i + 3] = '\0';
 
      r[j] = strtol(str + i + 1, 0, 16);
      str[i + 3] = savec;
 
      i += 2;
    } else r[j] = str[i];
 
    j++;
  }
 
  r[j] = '\0';
 
  return r;
 
}

Referenced by XrdHttpProtocol::Process().

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