parse a BER encoded string and decode it

[cocostaec]

can anyone tell a way how to parse a BER encoded string an then decode it to
ASN1?i've tried:
[code]
unsigned char* buffer;
        buffer=new unsigned
char[strlen("0x304913214D617374657220646520736563757269746174656120696E666F726D6174696569301E170D3039313030313030303030305A170D3130303331353030303030305A020103010101")];

strcpy((char*)buffer,"0x304913214D617374657220646520736563757269746174656120696E666F726D6174696569301E170D3039313030313030303030305A170D3130303331353030303030305A020103010101");
        BIO * outfile;
        outfile=BIO_new_file("out.txt","w+");

ASN1_parse(outfile,buffer,150,0);//strlen("0x304913214D617374657220646520736563757269746174656120696E666F726D6174696569301E170D3039313030313030303030305A170D3130303331353030303030305A020103010101"),0);
        BIO_free(outfile);
[/code]
but an error occured inthe outfile:

0:d=0  hl=2 l= 120 cons: SEQUENCE          
    2:d=1  hl=2 l=  48 cons: PRINTABLESTRING   
Error in encoding

thanks

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