OAuth library functions  1.0.3
Enumerations | Functions
oauth.h File Reference

OAuth.net implementation in POSIX-C. More...

Go to the source code of this file.

Enumerations

enum  OAuthMethod { OA_HMAC =0, OA_RSA, OA_PLAINTEXT }
 signature method to used for signing the request. More...
 

Functions

char * oauth_encode_base64 (int size, const unsigned char *src)
 Base64 encode and return size data in 'src'.
 
int oauth_decode_base64 (unsigned char *dest, const char *src)
 Decode the base64 encoded string 'src' into the memory pointed to by 'dest'.
 
char * oauth_url_escape (const char *string)
 Escape 'string' according to RFC3986 and http://oauth.net/core/1.0/#encoding_parameters.
 
char * oauth_url_unescape (const char *string, size_t *olen)
 Parse RFC3986 encoded 'string' back to unescaped version.
 
char * oauth_sign_hmac_sha1 (const char *m, const char *k)
 returns base64 encoded HMAC-SHA1 signature for given message and key.
 
char * oauth_sign_hmac_sha1_raw (const char *m, const size_t ml, const char *k, const size_t kl)
 same as oauth_sign_hmac_sha1 but allows one to specify length of message and key (in case they contain null chars).
 
char * oauth_sign_plaintext (const char *m, const char *k)
 returns plaintext signature for the given key.
 
char * oauth_sign_rsa_sha1 (const char *m, const char *k)
 returns RSA-SHA1 signature for given data.
 
int oauth_verify_rsa_sha1 (const char *m, const char *c, const char *s)
 verify RSA-SHA1 signature.
 
char * oauth_catenc (int len,...)
 url-escape strings and concatenate with '&' separator.
 
int oauth_split_url_parameters (const char *url, char ***argv)
 splits the given url into a parameter array.
 
int oauth_split_post_paramters (const char *url, char ***argv, short qesc)
 splits the given url into a parameter array.
 
char * oauth_serialize_url (int argc, int start, char **argv)
 build a url query string from an array.
 
char * oauth_serialize_url_sep (int argc, int start, char **argv, char *sep, int mod)
 encode query parameters from an array.
 
char * oauth_serialize_url_parameters (int argc, char **argv)
 build a query parameter string from an array.
 
char * oauth_gen_nonce ()
 generate a random string between 15 and 32 chars length and return a pointer to it.
 
int oauth_cmpstringp (const void *p1, const void *p2)
 string compare function for oauth parameters.
 
int oauth_param_exists (char **argv, int argc, char *key)
 search array for parameter key.
 
void oauth_add_param_to_array (int *argcp, char ***argvp, const char *addparam)
 add query parameter to array
 
void oauth_free_array (int *argcp, char ***argvp)
 free array args
 
int oauth_time_independent_equals_n (const char *a, const char *b, size_t len_a, size_t len_b)
 compare two strings in constant-time (as to not let an attacker guess how many leading chars are correct: http://rdist.root.org/2010/01/07/timing-independent-array-comparison/ )
 
int oauth_time_indepenent_equals_n (const char *a, const char *b, size_t len_a, size_t len_b) attribute_deprecated
 
int oauth_time_independent_equals (const char *a, const char *b)
 compare two strings in constant-time.
 
int oauth_time_indepenent_equals (const char *a, const char *b) attribute_deprecated
 
char * oauth_sign_url2 (const char *url, char **postargs, OAuthMethod method, const char *http_method, const char *c_key, const char *c_secret, const char *t_key, const char *t_secret)
 calculate OAuth-signature for a given HTTP request URL, parameters and oauth-tokens.
 
char * oauth_sign_url (const char *url, char **postargs, OAuthMethod method, const char *c_key, const char *c_secret, const char *t_key, const char *t_secret) attribute_deprecated
 
void oauth_sign_array2_process (int *argcp, char ***argvp, char **postargs, OAuthMethod method, const char *http_method, const char *c_key, const char *c_secret, const char *t_key, const char *t_secret)
 the back-end behind by /ref oauth_sign_array2.
 
char * oauth_sign_array2 (int *argcp, char ***argvp, char **postargs, OAuthMethod method, const char *http_method, const char *c_key, const char *c_secret, const char *t_key, const char *t_secret)
 same as /ref oauth_sign_url with the url already split into parameter array
 
char * oauth_sign_array (int *argcp, char ***argvp, char **postargs, OAuthMethod method, const char *c_key, const char *c_secret, const char *t_key, const char *t_secret) attribute_deprecated
 
char * oauth_body_hash_file (char *filename)
 calculate body hash (sha1sum) of given file and return a oauth_body_hash=xxxx parameter to be added to the request.
 
char * oauth_body_hash_data (size_t length, const char *data)
 calculate body hash (sha1sum) of given data and return a oauth_body_hash=xxxx parameter to be added to the request.
 
char * oauth_body_hash_encode (size_t len, unsigned char *digest)
 base64 encode digest, free it and return a URL parameter with the oauth_body_hash.
 
char * oauth_sign_xmpp (const char *xml, OAuthMethod method, const char *c_secret, const char *t_secret)
 xep-0235 - TODO
 
char * oauth_http_get (const char *u, const char *q) attribute_deprecated
 do a HTTP GET request, wait for it to finish and return the content of the reply.
 
char * oauth_http_get2 (const char *u, const char *q, const char *customheader) attribute_deprecated
 do a HTTP GET request, wait for it to finish and return the content of the reply.
 
char * oauth_http_post (const char *u, const char *p) attribute_deprecated
 do a HTTP POST request, wait for it to finish and return the content of the reply.
 
char * oauth_http_post2 (const char *u, const char *p, const char *customheader) attribute_deprecated
 do a HTTP POST request, wait for it to finish and return the content of the reply.
 
char * oauth_post_file (const char *u, const char *fn, const size_t len, const char *customheader) attribute_deprecated
 http post raw data from file.
 
char * oauth_post_data (const char *u, const char *data, size_t len, const char *customheader) attribute_deprecated
 http post raw data the returned string needs to be freed by the caller (requires libcurl)
 
char * oauth_post_data_with_callback (const char *u, const char *data, size_t len, const char *customheader, void(*callback)(void *, int, size_t, size_t), void *callback_data) attribute_deprecated
 http post raw data, with callback.
 
char * oauth_send_data (const char *u, const char *data, size_t len, const char *customheader, const char *httpMethod) attribute_deprecated
 http send raw data.
 
char * oauth_send_data_with_callback (const char *u, const char *data, size_t len, const char *customheader, void(*callback)(void *, int, size_t, size_t), void *callback_data, const char *httpMethod) attribute_deprecated
 http post raw data, with callback.
 

Detailed Description

OAuth.net implementation in POSIX-C.

Author
Robin Gareus robin.nosp@m.@gar.nosp@m.eus.o.nosp@m.rg

Copyright 2007-2014 Robin Gareus robin.nosp@m.@gar.nosp@m.eus.o.nosp@m.rg

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Definition in file oauth.h.

Enumeration Type Documentation

signature method to used for signing the request.

Enumerator:
OA_HMAC 

use HMAC-SHA1 request signing method

OA_RSA 

use RSA signature

OA_PLAINTEXT 

use plain text signature (for testing only)

Definition at line 66 of file oauth.h.

Function Documentation

void oauth_add_param_to_array ( int *  argcp,
char ***  argvp,
const char *  addparam 
)

add query parameter to array

Parameters
argcppointer to array length int
argvppointer to array values
addparamparameter to add (eg. "foo=bar")
char* oauth_body_hash_data ( size_t  length,
const char *  data 
)

calculate body hash (sha1sum) of given data and return a oauth_body_hash=xxxx parameter to be added to the request.

The returned string needs to be freed by the calling function. The returned string is not yet url-escaped and suitable to be passed as argument to oauth_catenc.

see http://oauth.googlecode.com/svn/spec/ext/body_hash/1.0/oauth-bodyhash.html

Parameters
lengthlength of the data parameter in bytes
datato calculate the hash for
Returns
URL oauth_body_hash parameter string
Examples:
tests/oauthbodyhash.c.
char* oauth_body_hash_encode ( size_t  len,
unsigned char *  digest 
)

base64 encode digest, free it and return a URL parameter with the oauth_body_hash.

The returned hash needs to be freed by the calling function. The returned string is not yet url-escaped and thus suitable to be passed to oauth_catenc.

Parameters
lenlength of the digest to encode
digesthash value to encode
Returns
URL oauth_body_hash parameter string
char* oauth_body_hash_file ( char *  filename)

calculate body hash (sha1sum) of given file and return a oauth_body_hash=xxxx parameter to be added to the request.

The returned string needs to be freed by the calling function.

see http://oauth.googlecode.com/svn/spec/ext/body_hash/1.0/oauth-bodyhash.html

Parameters
filenamethe filename to calculate the hash for
Returns
URL oauth_body_hash parameter string
Examples:
tests/oauthbodyhash.c.
char* oauth_catenc ( int  len,
  ... 
)

url-escape strings and concatenate with '&' separator.

The number of strings to be concatenated must be given as first argument. all arguments thereafter must be of type (char *)

Parameters
lenthe number of arguments to follow this parameter
Returns
pointer to memory holding the concatenated strings - needs to be xfree(d) by the caller. or NULL in case we ran out of memory.
int oauth_cmpstringp ( const void *  p1,
const void *  p2 
)

string compare function for oauth parameters.

used with qsort. needed to normalize request parameters. see http://oauth.net/core/1.0/#anchor14

Examples:
tests/oauthexample.c, tests/oauthtest.c, and tests/oauthtest2.c.
int oauth_decode_base64 ( unsigned char *  dest,
const char *  src 
)

Decode the base64 encoded string 'src' into the memory pointed to by 'dest'.

Parameters
destPointer to memory for holding the decoded string. Must be large enough to receive the decoded string.
srcA base64 encoded string.
Returns
the length of the decoded string if decode succeeded otherwise 0.
char* oauth_encode_base64 ( int  size,
const unsigned char *  src 
)

Base64 encode and return size data in 'src'.

The caller must free the returned string.

Parameters
sizeThe size of the data in src
srcThe data to be base64 encode
Returns
encoded string otherwise NULL
void oauth_free_array ( int *  argcp,
char ***  argvp 
)

free array args

Parameters
argcppointer to array length int
argvppointer to array values to be xfree()d
Examples:
tests/oauthtest2.c.
char* oauth_gen_nonce ( )

generate a random string between 15 and 32 chars length and return a pointer to it.

The value needs to be freed by the caller

Returns
zero terminated random string.
char* oauth_http_get ( const char *  u,
const char *  q 
)

do a HTTP GET request, wait for it to finish and return the content of the reply.

(requires libcurl or a command-line HTTP client)

If compiled without libcurl this function calls a command-line executable defined in the environment variable OAUTH_HTTP_GET_CMD - it defaults to curl -sA 'liboauth-agent/0.1' '%u' where %u is replaced with the URL and query parameters.

bash & wget example: export OAUTH_HTTP_CMD="wget -q -U 'liboauth-agent/0.1' '%u' "

WARNING: this is a tentative function. it's convenient and handy for testing or developing OAuth code. But don't rely on this function to become a stable part of this API. It does not do much error checking or handling for one thing..

NOTE: u and q are just concatenated with a '?' in between, unless q is NULL. in which case only u will be used.

Parameters
ubase url to get
qquery string to send along with the HTTP request or NULL.
Returns
In case of an error NULL is returned; otherwise a pointer to the replied content from HTTP server. latter needs to be freed by caller.
Deprecated:
use libcurl - http://curl.haxx.se/libcurl/c/
Examples:
tests/oauthexample.c, and tests/oauthtest.c.
char* oauth_http_get2 ( const char *  u,
const char *  q,
const char *  customheader 
)

do a HTTP GET request, wait for it to finish and return the content of the reply.

(requires libcurl)

This is equivalent to /ref oauth_http_get but allows one to specifiy a custom HTTP header andhas no support for commandline-curl.

If liboauth is compiled without libcurl this function always returns NULL.

Parameters
ubase url to get
qquery string to send along with the HTTP request or NULL.
customheaderspecify custom HTTP header (or NULL for none) Multiple header elements can be passed separating them with "\r\n"
Returns
In case of an error NULL is returned; otherwise a pointer to the replied content from HTTP server. latter needs to be freed by caller.
Deprecated:
use libcurl - http://curl.haxx.se/libcurl/c/
Examples:
tests/oauthtest2.c.
char* oauth_http_post ( const char *  u,
const char *  p 
)

do a HTTP POST request, wait for it to finish and return the content of the reply.

(requires libcurl or a command-line HTTP client)

If compiled without libcurl this function calls a command-line executable defined in the environment variable OAUTH_HTTP_CMD - it defaults to curl -sA 'liboauth-agent/0.1' -d '%p' '%u' where %p is replaced with the postargs and %u is replaced with the URL.

bash & wget example: export OAUTH_HTTP_CMD="wget -q -U 'liboauth-agent/0.1' –post-data='%p' '%u' "

NOTE: This function uses the curl's default HTTP-POST Content-Type: application/x-www-form-urlencoded which is the only option allowed by oauth core 1.0 spec. Experimental code can use the Environment variable to transmit custom HTTP headers or parameters.

WARNING: this is a tentative function. it's convenient and handy for testing or developing OAuth code. But don't rely on this function to become a stable part of this API. It does not do much error checking for one thing..

Parameters
uurl to query
ppostargs to send along with the HTTP request.
Returns
replied content from HTTP server. needs to be freed by caller.
Deprecated:
use libcurl - http://curl.haxx.se/libcurl/c/
Examples:
tests/oauthexample.c, and tests/oauthtest.c.
char* oauth_http_post2 ( const char *  u,
const char *  p,
const char *  customheader 
)

do a HTTP POST request, wait for it to finish and return the content of the reply.

(requires libcurl)

It's equivalent to /ref oauth_http_post, but offers the possibility to specify a custom HTTP header and has no support for commandline-curl.

If liboauth is compiled without libcurl this function always returns NULL.

Parameters
uurl to query
ppostargs to send along with the HTTP request.
customheaderspecify custom HTTP header (or NULL for none) Multiple header elements can be passed separating them with "\r\n"
Returns
replied content from HTTP server. needs to be freed by caller.
Deprecated:
use libcurl - http://curl.haxx.se/libcurl/c/
int oauth_param_exists ( char **  argv,
int  argc,
char *  key 
)

search array for parameter key.

Parameters
argvlength of array to search
argcparameter array to search
keykey of parameter to check.
Returns
FALSE (0) if array does not contain a parameter with given key, TRUE (1) otherwise.
char* oauth_post_data ( const char *  u,
const char *  data,
size_t  len,
const char *  customheader 
)

http post raw data the returned string needs to be freed by the caller (requires libcurl)

see dislaimer: /ref oauth_http_post

Parameters
uurl to retrieve
datadata to post
lenlength of the data in bytes.
customheaderspecify custom HTTP header (or NULL for default) Multiple header elements can be passed separating them with "\r\n"
Returns
returned HTTP reply or NULL on error
Deprecated:
use libcurl - http://curl.haxx.se/libcurl/c/
Examples:
tests/oauthbodyhash.c.
char* oauth_post_data_with_callback ( const char *  u,
const char *  data,
size_t  len,
const char *  customheader,
void(*)(void *, int, size_t, size_t)  callback,
void *  callback_data 
)

http post raw data, with callback.

the returned string needs to be freed by the caller (requires libcurl)

Invokes the callback - in no particular order - when HTTP-request status updates occur. The callback is called with: void * callback_data: supplied on function call. int type: 0=data received, 1=data sent. size_t size: amount of data received or amount of data sent so far size_t totalsize: original amount of data to send, or amount of data received

Parameters
uurl to retrieve
datadata to post along
lenlength of the file in bytes. set to '0' for autodetection
customheaderspecify custom HTTP header (or NULL for default) Multiple header elements can be passed separating them with "\r\n"
callbackspecify the callback function
callback_dataspecify data to pass to the callback function
Returns
returned HTTP reply or NULL on error
Deprecated:
use libcurl - http://curl.haxx.se/libcurl/c/
char* oauth_post_file ( const char *  u,
const char *  fn,
const size_t  len,
const char *  customheader 
)

http post raw data from file.

the returned string needs to be freed by the caller (requires libcurl)

see dislaimer: /ref oauth_http_post

Parameters
uurl to retrieve
fnfilename of the file to post along
lenlength of the file in bytes. set to '0' for autodetection
customheaderspecify custom HTTP header (or NULL for default). Multiple header elements can be passed separating them with "\r\n"
Returns
returned HTTP reply or NULL on error
Deprecated:
use libcurl - http://curl.haxx.se/libcurl/c/
char* oauth_send_data ( const char *  u,
const char *  data,
size_t  len,
const char *  customheader,
const char *  httpMethod 
)

http send raw data.

similar to /ref oauth_http_post but provides for specifying the HTTP request method.

the returned string needs to be freed by the caller (requires libcurl)

see dislaimer: /ref oauth_http_post

Parameters
uurl to retrieve
datadata to post
lenlength of the data in bytes.
customheaderspecify custom HTTP header (or NULL for default) Multiple header elements can be passed separating them with "\r\n"
httpMethodspecify http verb ("GET"/"POST"/"PUT"/"DELETE") to be used. if httpMethod is NULL, a POST is executed.
Returns
returned HTTP reply or NULL on error
Deprecated:
use libcurl - http://curl.haxx.se/libcurl/c/
char* oauth_send_data_with_callback ( const char *  u,
const char *  data,
size_t  len,
const char *  customheader,
void(*)(void *, int, size_t, size_t)  callback,
void *  callback_data,
const char *  httpMethod 
)

http post raw data, with callback.

the returned string needs to be freed by the caller (requires libcurl)

Invokes the callback - in no particular order - when HTTP-request status updates occur. The callback is called with: void * callback_data: supplied on function call. int type: 0=data received, 1=data sent. size_t size: amount of data received or amount of data sent so far size_t totalsize: original amount of data to send, or amount of data received

Parameters
uurl to retrieve
datadata to post along
lenlength of the file in bytes. set to '0' for autodetection
customheaderspecify custom HTTP header (or NULL for default) Multiple header elements can be passed separating them with "\r\n"
callbackspecify the callback function
callback_dataspecify data to pass to the callback function
httpMethodspecify http verb ("GET"/"POST"/"PUT"/"DELETE") to be used.
Returns
returned HTTP reply or NULL on error
Deprecated:
use libcurl - http://curl.haxx.se/libcurl/c/
char* oauth_serialize_url ( int  argc,
int  start,
char **  argv 
)

build a url query string from an array.

Parameters
argcthe total number of elements in the array
startelement in the array at which to start concatenating.
argvparameter-array to concatenate.
Returns
url string needs to be freed by the caller.
char* oauth_serialize_url_parameters ( int  argc,
char **  argv 
)

build a query parameter string from an array.

This function is a shortcut for oauth_serialize_url (argc, 1, argv). It strips the leading host/path, which is usually the first element when using oauth_split_url_parameters on an URL.

Parameters
argcthe total number of elements in the array
argvparameter-array to concatenate.
Returns
url string needs to be freed by the caller.
char* oauth_serialize_url_sep ( int  argc,
int  start,
char **  argv,
char *  sep,
int  mod 
)

encode query parameters from an array.

Parameters
argcthe total number of elements in the array
startelement in the array at which to start concatenating.
argvparameter-array to concatenate.
sepseparator for parameters (usually "&")
mod- bitwise modifiers: 1: skip all values that start with "oauth_" 2: skip all values that don't start with "oauth_" 4: double quotation marks are added around values (use with sep ", " for HTTP Authorization header).
Returns
url string needs to be freed by the caller.
Examples:
tests/oauthtest2.c.
char* oauth_sign_array ( int *  argcp,
char ***  argvp,
char **  postargs,
OAuthMethod  method,
const char *  c_key,
const char *  c_secret,
const char *  t_key,
const char *  t_secret 
)
char* oauth_sign_array2 ( int *  argcp,
char ***  argvp,
char **  postargs,
OAuthMethod  method,
const char *  http_method,
const char *  c_key,
const char *  c_secret,
const char *  t_key,
const char *  t_secret 
)

same as /ref oauth_sign_url with the url already split into parameter array

Parameters
argcppointer to array length int
argvppointer to array values (argv[0]="http://example.org:80/" argv[1]="first=QueryParamater" .. the array is modified: fi. oauth_ parameters are added) These arrays can be generated with /ref oauth_split_url_parameters or /ref oauth_split_post_paramters.
postargsThis parameter points to an area where the return value is stored. If 'postargs' is NULL, no value is stored.
methodspecify the signature method to use. It is of type OAuthMethod and most likely OA_HMAC.
http_methodThe HTTP request method to use (ie "GET", "PUT",..) If NULL is given as 'http_method' this defaults to "GET" when 'postargs' is also NULL and when postargs is not NULL "POST" is used.
c_keyconsumer key
c_secretconsumer secret
t_keytoken key
t_secrettoken secret
Returns
the signed url or NULL if an error occurred.
void oauth_sign_array2_process ( int *  argcp,
char ***  argvp,
char **  postargs,
OAuthMethod  method,
const char *  http_method,
const char *  c_key,
const char *  c_secret,
const char *  t_key,
const char *  t_secret 
)

the back-end behind by /ref oauth_sign_array2.

however it does not serialize the signed URL again. The user needs to call /ref oauth_serialize_url (oA) and /ref oauth_free_array to do so.

This allows one to split parts of the URL to be used for OAuth HTTP Authorization header: see http://oauth.net/core/1.0a/#consumer_req_param the oauthtest2 example code does so.

Parameters
argcppointer to array length int
argvppointer to array values (argv[0]="http://example.org:80/" argv[1]="first=QueryParamater" .. the array is modified: fi. oauth_ parameters are added) These arrays can be generated with /ref oauth_split_url_parameters or /ref oauth_split_post_paramters.
postargsThis parameter points to an area where the return value is stored. If 'postargs' is NULL, no value is stored.
methodspecify the signature method to use. It is of type OAuthMethod and most likely OA_HMAC.
http_methodThe HTTP request method to use (ie "GET", "PUT",..) If NULL is given as 'http_method' this defaults to "GET" when 'postargs' is also NULL and when postargs is not NULL "POST" is used.
c_keyconsumer key
c_secretconsumer secret
t_keytoken key
t_secrettoken secret
Returns
void
Examples:
tests/oauthtest2.c.
char* oauth_sign_hmac_sha1 ( const char *  m,
const char *  k 
)

returns base64 encoded HMAC-SHA1 signature for given message and key.

both data and key need to be urlencoded.

the returned string needs to be freed by the caller

Parameters
mmessage to be signed
kkey used for signing
Returns
signature string.
Examples:
tests/selftest_wiki.c.
char* oauth_sign_hmac_sha1_raw ( const char *  m,
const size_t  ml,
const char *  k,
const size_t  kl 
)

same as oauth_sign_hmac_sha1 but allows one to specify length of message and key (in case they contain null chars).

Parameters
mmessage to be signed
mllength of message
kkey used for signing
kllength of key
Returns
signature string.
char* oauth_sign_plaintext ( const char *  m,
const char *  k 
)

returns plaintext signature for the given key.

the returned string needs to be freed by the caller

Parameters
mmessage to be signed
kkey used for signing
Returns
signature string
char* oauth_sign_rsa_sha1 ( const char *  m,
const char *  k 
)

returns RSA-SHA1 signature for given data.

the returned signature needs to be freed by the caller.

Parameters
mmessage to be signed
kprivate-key PKCS and Base64-encoded
Returns
base64 encoded signature string.
Examples:
tests/selftest_wiki.c.
char* oauth_sign_url ( const char *  url,
char **  postargs,
OAuthMethod  method,
const char *  c_key,
const char *  c_secret,
const char *  t_key,
const char *  t_secret 
)
char* oauth_sign_url2 ( const char *  url,
char **  postargs,
OAuthMethod  method,
const char *  http_method,
const char *  c_key,
const char *  c_secret,
const char *  t_key,
const char *  t_secret 
)

calculate OAuth-signature for a given HTTP request URL, parameters and oauth-tokens.

if 'postargs' is NULL a "GET" request is signed and the signed URL is returned. Else this fn will modify 'postargs' to point to memory that contains the signed POST-variables and returns the base URL.

both, the return value and (if given) 'postargs' need to be freed by the caller.

Parameters
urlThe request URL to be signed. append all GET or POST query-parameters separated by either '?' or '&' to this parameter.
postargsThis parameter points to an area where the return value is stored. If 'postargs' is NULL, no value is stored.
methodspecify the signature method to use. It is of type OAuthMethod and most likely OA_HMAC.
http_methodThe HTTP request method to use (ie "GET", "PUT",..) If NULL is given as 'http_method' this defaults to "GET" when 'postargs' is also NULL and when postargs is not NULL "POST" is used.
c_keyconsumer key
c_secretconsumer secret
t_keytoken key
t_secrettoken secret
Returns
the signed url or NULL if an error occurred.
Examples:
tests/oauthbodyhash.c, tests/oauthexample.c, and tests/oauthtest.c.
char* oauth_sign_xmpp ( const char *  xml,
OAuthMethod  method,
const char *  c_secret,
const char *  t_secret 
)

xep-0235 - TODO

int oauth_split_post_paramters ( const char *  url,
char ***  argv,
short  qesc 
)

splits the given url into a parameter array.

(see oauth_serialize_url and oauth_serialize_url_parameters for the reverse)

Parameters
urlthe url or query-string to parse.
argvpointer to a (char *) array where the results are stored. The array is re-allocated to match the number of parameters and each parameter-string is allocated with strdup. - The memory needs to be freed by the caller.
qescuse query parameter escape (vs post-param-escape) - if set to 1 all '+' are treated as spaces ' '
Returns
number of parameter(s) in array.
int oauth_split_url_parameters ( const char *  url,
char ***  argv 
)

splits the given url into a parameter array.

(see oauth_serialize_url and oauth_serialize_url_parameters for the reverse) (see oauth_split_post_paramters for a more generic version)

Parameters
urlthe url or query-string to parse; may be NULL
argvpointer to a (char *) array where the results are stored. The array is re-allocated to match the number of parameters and each parameter-string is allocated with strdup. - The memory needs to be freed by the caller.
Returns
number of parameter(s) in array.
Examples:
tests/oauthexample.c, tests/oauthtest.c, and tests/oauthtest2.c.
int oauth_time_independent_equals ( const char *  a,
const char *  b 
)

compare two strings in constant-time.

wrapper to oauth_time_independent_equals_n which calls strlen() for each argument.

Parameters
astring to compare
bstring to compare

returns 0 (false) if strings are not equal, and 1 (true) if strings are equal.

int oauth_time_independent_equals_n ( const char *  a,
const char *  b,
size_t  len_a,
size_t  len_b 
)

compare two strings in constant-time (as to not let an attacker guess how many leading chars are correct: http://rdist.root.org/2010/01/07/timing-independent-array-comparison/ )

Parameters
astring to compare
bstring to compare
len_alength of string a
len_blength of string b

returns 0 (false) if strings are not equal, and 1 (true) if strings are equal.

int oauth_time_indepenent_equals ( const char *  a,
const char *  b 
)
int oauth_time_indepenent_equals_n ( const char *  a,
const char *  b,
size_t  len_a,
size_t  len_b 
)
char* oauth_url_escape ( const char *  string)

Escape 'string' according to RFC3986 and http://oauth.net/core/1.0/#encoding_parameters.

Parameters
stringThe data to be encoded
Returns
encoded string otherwise NULL The caller must free the returned string.
char* oauth_url_unescape ( const char *  string,
size_t *  olen 
)

Parse RFC3986 encoded 'string' back to unescaped version.

Parameters
stringThe data to be unescaped
olenunless NULL the length of the returned string is stored there.
Returns
decoded string or NULL The caller must free the returned string.
int oauth_verify_rsa_sha1 ( const char *  m,
const char *  c,
const char *  s 
)

verify RSA-SHA1 signature.

returns the output of EVP_VerifyFinal() for a given message, cert/pubkey and signature.

Parameters
mmessage to be verified
cpublic-key or x509 certificate
sbase64 encoded signature
Returns
1 for a correct signature, 0 for failure and -1 if some other error occurred
Examples:
tests/selftest_wiki.c.