RES: PEM_read_PrivateKey

[Leonardo Laface de Almeida]

@Gerardo,

I'm having a problem with this function and I will use your thread for some
support.

@All

The problem I've got is quite simple. The callback I pass throught this
function is not called. I inserted a breakpoint into cb and it's not called
at all.

I'm using OpenSSL 1.0.1c. I'm sure about it (My App gets OpenSSL version,
now).

Someone could please help me figure out why? I've wrote as OpenSSL page
tells. Am I doing something wrong? Is thera a best way for doing this? 

Thanks,
Leonardo

My code (c++):


#include "openssl/bio.h"
#include "openssl/err.h"
#include "openssl/evp.h"
#include "openssl/pem.h"

EVP_PKEY *pkey;
BIO *bio;

typedef struct pw_cb_data
{
    const void *password;
    const char *prompt_info;
} PW_CB_DATA;

static int rsa_cb(char *buf, int size, int rwflag, void *u)
{
    int len;
    PW_CB_DATA *cb_data = (PW_CB_DATA *)u;
    
    //Programm doesn't enter here!!
    len = strlen((char *)cb_data->password);

    if (len <= 0)
        return 0;

    /* if too long, truncate */
    if (len > size)
        len = size;

    memcpy(buf, cb_data->password, len);

    return len;
}

int main()
{
    PW_CB_DATA cb_data; 
    int ret = 1;

(...)
    memcpy(&kprPath[0],"path_to_Kpr",pathlen);
    kprPath[pathlen] = '\0';

    memcpy(&kprPath[0],"Kpr_password",passlen);
    kprPath[passlen] = '\0';

    if (ret)
        bio = BIO_new(BIO_s_file());

    if (bio == NULL)
        ret = 0;

    if (ret && !BIO_read_filename(bio,&kprPath[0]))
        ret = 0;

    cb_data.password = &passwd[0];
    cb_data.prompt_info = &kprPath[0];

    if (ret)
        pkey=PEM_read_bio_PrivateKey(bio,NULL,(pem_password_cb *)rsa_cb,
&cb_data); 
    
    if (pkey != NULL)
          ret = 0;

    //ret is equal 0 and pkey is NULL here.
(...)

    return ret;
}

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