c - base64 decode not working -

-

i have following code:

char *encoded = "dghpcybpcybhihrlc3qgc3ryaw5n"; char *unbase = unbase64(encoded,strlen(encoded)); printf("original: %s\n",unbase); free(unbase);   char *unbase64(unsigned char *input,int length) {     bio *b64,*bmem;     char *buff = (char *)malloc(length);     b64 = bio_new(bio_f_base64());     bmem = bio_new_mem_buf(input,length);     bmem = bio_push(b64,bmem);     bio_read(bmem,buff,length);     bio_free_all(bmem);     return buff; }  char *base64(const unsigned char *input,int length) {     bio *bmem,*b64 = null;     buf_mem *bptr;     b64 = bio_new(bio_f_base64());     bmem = bio_new(bio_s_mem());     b64 = bio_push(b64,bmem);     bio_write(b64,input,length);     bio_flush(b64);     bio_get_mem_ptr(b64,&bptr);     char *buff = (char *)malloc(bptr->length);     memcpy(buff,bptr->data,bptr->length-1);     buff[bptr->length-1] = 0;     bio_free_all(b64);     return buff; }

which doesn't show decoded string.

base64 encoding working fine, doing wrong?

edit: found answer ... base64 decoding requires '\n'

the openssl api dreadful use, commend on insanity. regardless, you've eluded in-comment, decoder requires newline unless tell otherwise, code below does:

char *unbase64(void *input, int length) {     char *res = malloc(length);     bio *bmem = bio_new_mem_buf(input, length);     bio *b64 = bio_new(bio_f_base64());     bio_set_flags(b64, bio_flags_base64_no_nl);     bmem = bio_push(b64, bmem);      long n = bio_read(bmem, res, length);     if (n > 0)         res[n] = 0;     else         res[0] = 0; // note: error state.      bio_free_all(bmem);      return res; }

run against data, following result

original: test string

yeah, because that's intuitive.


Comments

Post a Comment

Popular posts from this blog

c# - How Configure Devart dotConnect for SQLite Code First? -

-
can configure following sample code ? when run following code, error : no entity framework provider found ado.net provider invariant name 'devart.data.sqlite' setting in machine.config <system.data> <dbproviderfactories> <add name="dotconnect sqlite" invariant="devart.data.sqlite" description="devart dotconnect sqlite" type="devart.data.sqlite.sqliteproviderfactory, devart.data.sqlite, version=4.6.287.0, culture=neutral, publickeytoken=09af7300eec23701" /> </dbproviderfactories> </system.data> after add below block code in app.config <?xml version="1.0"?> <configuration>   <configsections> <!-- more information on entity framework configuration, visit http://go.microsoft.com/fwlink/?linkid=237468 --> <section name="entityframework" type="system.data.entity.internal.configfile.entityframeworksection, entit...
Read more

java - Copying object fields -

-
what best way of copying classes when need have 2 independent variables? have simple class: public class myclass { boolean = false; string b= "not empty"; } do need make method : assign(myclass data ) { a= data.a; b= data.b; } is there automatic method copy (duplicate) objects in java? do need make method : pretty close. instead of making method, should make constructor. such constructors called copy constructor , , create them this: myclass(myclass data) { = data.a; b = data.b; } and create copy of instance, use constructor this: myclass obj1 = new myclass(); myclass obj2 = new myclass(obj1); copy constructor can tedious : using copy constructor create deep-copy can tedious, when class has mutable fields. in case, assignment create copy of reference, , not object itself. have create copy of fields (if want deep copy). can go recursive. a better way create deep copy serialize , deserialize object. why not use clone()? ...
Read more

c++ - Clear the memory after returning a vector in a function -

-
i have function processes , stores lot of data in , returns results vector of class. amount of data stored in function tremendous , want clear storage memory of function after finished job. necessary (does function automatically clear memory) or should clear memory function? update: vector<customers> process(char* const *filename, vector<int> id) { vector<customers> list_of_customers; (perform actions) return list_of_customers; } variables defined locally within function automatically released @ end of function scope. destructors objects called, should free memory allocated objects (if objects coded correctly). example of such object std::vector . anything you've allocated new must have corresponding delete release storage. try avoid doing own allocation , use raii instead, i.e. containers or smart pointers.
Read more