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#include <string.h>
z„
typedef struct {
    char *password;
    int length;
    int called;
    int error;
    int maxsize;
} CRYPTOGRAPHY_PASSWORD_DATA;
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int Cryptography_pem_password_cb(char *, int, int, void *);
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typedef struct {
    char *password;
    int length;
    int called;
    int error;
    int maxsize;
} CRYPTOGRAPHY_PASSWORD_DATA;

int Cryptography_pem_password_cb(char *buf, int size,
                                  int rwflag, void *userdata) {
    /* The password cb is only invoked if OpenSSL decides the private
       key is encrypted. So this path only occurs if it needs a password */
    CRYPTOGRAPHY_PASSWORD_DATA *st = (CRYPTOGRAPHY_PASSWORD_DATA *)userdata;
    st->called += 1;
    st->maxsize = size;
    if (st->length == 0) {
        st->error = -1;
        return 0;
    } else if (st->length < size) {
        memcpy(buf, st->password, st->length);
        return st->length;
    } else {
        st->error = -2;
        return 0;
    }
}
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