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#include <errno.h>
#include <cassert>
#include <vector>
#include <string>
#include <openssl/bio.h>
#include <openssl/evp.h>
#include <curl/curl.h>
#include "opkele/util.h"
#include "opkele/exception.h"
namespace opkele {
using namespace std;
namespace util {
/*
* base64
*/
string encode_base64(const void *data,size_t length) {
BIO *b64 = 0, *bmem = 0;
try {
b64 = BIO_new(BIO_f_base64());
if(!b64)
throw exception_openssl(OPKELE_CP_ "failed to BIO_new() base64 encoder");
BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL);
bmem = BIO_new(BIO_s_mem());
BIO_set_flags(b64,BIO_CLOSE);
if(!bmem)
throw exception_openssl(OPKELE_CP_ "failed to BIO_new() memory buffer");
BIO_push(b64,bmem);
if(BIO_write(b64,data,length)!=length)
throw exception_openssl(OPKELE_CP_ "failed to BIO_write()");
BIO_flush(b64);
char *rvd;
long rvl = BIO_get_mem_data(bmem,&rvd);
string rv(rvd,rvl);
BIO_free_all(b64);
return rv;
}catch(...) {
if(b64) BIO_free_all(b64);
throw;
}
}
void decode_base64(const string& data,vector<unsigned char>& rv) {
BIO *b64 = 0, *bmem = 0;
rv.clear();
try {
bmem = BIO_new_mem_buf((void*)data.data(),data.size());
if(!bmem)
throw exception_openssl(OPKELE_CP_ "failed to BIO_new_mem_buf()");
b64 = BIO_new(BIO_f_base64());
if(!b64)
throw exception_openssl(OPKELE_CP_ "failed to BIO_new() base64 decoder");
BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL);
BIO_push(b64,bmem);
unsigned char tmp[512];
size_t rb = 0;
while((rb=BIO_read(b64,tmp,sizeof(tmp)))>0)
rv.insert(rv.end(),tmp,&tmp[rb]);
BIO_free_all(b64);
}catch(...) {
if(b64) BIO_free_all(b64);
throw;
}
}
/*
* big numerics
*/
BIGNUM *base64_to_bignum(const string& b64) {
vector<unsigned char> bin;
decode_base64(b64,bin);
BIGNUM *rv = BN_bin2bn(&(bin.front()),bin.size(),0);
if(!rv)
throw failed_conversion(OPKELE_CP_ "failed to BN_bin2bn()");
return rv;
}
BIGNUM *dec_to_bignum(const string& dec) {
BIGNUM *rv = 0;
if(!BN_dec2bn(&rv,dec.c_str()))
throw failed_conversion(OPKELE_CP_ "failed to BN_dec2bn()");
return rv;
}
string bignum_to_base64(const BIGNUM *bn) {
vector<unsigned char> bin(BN_num_bytes(bn)+1);
unsigned char *binptr = &(bin.front())+1;
int l = BN_bn2bin(bn,binptr);
if(l && (*binptr)&0x80){
(*(--binptr)) = 0; ++l;
}
return encode_base64(binptr,l);
}
/*
* w3c times
*/
string time_to_w3c(time_t t) {
struct tm tm_t;
if(!gmtime_r(&t,&tm_t))
throw failed_conversion(OPKELE_CP_ "failed to BN_dec2bn()");
char rv[25];
if(!strftime(rv,sizeof(rv)-1,"%Y-%m-%dT%H:%M:%SZ",&tm_t))
throw failed_conversion(OPKELE_CP_ "failed to strftime()");
return rv;
}
time_t w3c_to_time(const string& w) {
struct tm tm_t;
memset(&tm_t,0,sizeof(tm_t));
if(
sscanf(
w.c_str(),
"%04d-%02d-%02dT%02d:%02d:%02dZ",
&tm_t.tm_year,&tm_t.tm_mon,&tm_t.tm_mday,
&tm_t.tm_hour,&tm_t.tm_min,&tm_t.tm_sec
) != 6 )
throw failed_conversion(OPKELE_CP_ "failed to sscanf()");
tm_t.tm_mon--;
tm_t.tm_year-=1900;
time_t rv = mktime(&tm_t);
if(rv==(time_t)-1)
throw failed_conversion(OPKELE_CP_ "failed to mktime()");
return rv;
}
/*
*
*/
string url_encode(const string& str) {
char * t = curl_escape(str.c_str(),str.length());
if(!t)
throw failed_conversion(OPKELE_CP_ "failed to curl_escape()");
string rv(t);
curl_free(t);
return rv;
}
string long_to_string(long l) {
char rv[32];
int r=snprintf(rv,sizeof(rv),"%ld",l);
if(r<0 || r>=sizeof(rv))
throw failed_conversion(OPKELE_CP_ "failed to snprintf()");
return rv;
}
long string_to_long(const string& s) {
char *endptr = 0;
long rv = strtol(s.c_str(),&endptr,10);
if((!endptr) || endptr==s.c_str())
throw failed_conversion(OPKELE_CP_ "failed to strtol()");
return rv;
}
}
}
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