class OpenSSL::X509::Request

static VALUE
ossl_x509req_initialize(int argc, VALUE *argv, VALUE self)
{
    BIO *in;
    X509_REQ *req, *x = DATA_PTR(self);
    VALUE arg;

    if (rb_scan_args(argc, argv, "01", &arg) == 0) {
        return self;
    }
    arg = ossl_to_der_if_possible(arg);
    in = ossl_obj2bio(&arg);
    req = PEM_read_bio_X509_REQ(in, &x, NULL, NULL);
    DATA_PTR(self) = x;
    if (!req) {
        OSSL_BIO_reset(in);
        req = d2i_X509_REQ_bio(in, &x);
        DATA_PTR(self) = x;
    }
    BIO_free(in);
    if (!req) ossl_raise(eX509ReqError, NULL);

    return self;
}

static VALUE
ossl_x509req_add_attribute(VALUE self, VALUE attr)
{
    X509_REQ *req;

    GetX509Req(self, req);
    if (!X509_REQ_add1_attr(req, GetX509AttrPtr(attr))) {
        ossl_raise(eX509ReqError, NULL);
    }

    return attr;
}

static VALUE
ossl_x509req_get_attributes(VALUE self)
{
    X509_REQ *req;
    int count, i;
    X509_ATTRIBUTE *attr;
    VALUE ary;

    GetX509Req(self, req);

    count = X509_REQ_get_attr_count(req);
    if (count < 0) {
        OSSL_Debug("count < 0???");
        return rb_ary_new();
    }
    ary = rb_ary_new2(count);
    for (i=0; i<count; i++) {
        attr = X509_REQ_get_attr(req, i);
        rb_ary_push(ary, ossl_x509attr_new(attr));
    }

    return ary;
}

static VALUE
ossl_x509req_set_attributes(VALUE self, VALUE ary)
{
    X509_REQ *req;
    X509_ATTRIBUTE *attr;
    long i;
    VALUE item;

    Check_Type(ary, T_ARRAY);
    for (i=0;i<RARRAY_LEN(ary); i++) {
        OSSL_Check_Kind(RARRAY_AREF(ary, i), cX509Attr);
    }
    GetX509Req(self, req);
    while ((attr = X509_REQ_delete_attr(req, 0)))
        X509_ATTRIBUTE_free(attr);
    for (i=0;i<RARRAY_LEN(ary); i++) {
        item = RARRAY_AREF(ary, i);
        attr = GetX509AttrPtr(item);
        if (!X509_REQ_add1_attr(req, attr)) {
            ossl_raise(eX509ReqError, NULL);
        }
    }
    return ary;
}

static VALUE
ossl_x509req_get_public_key(VALUE self)
{
    X509_REQ *req;
    EVP_PKEY *pkey;

    GetX509Req(self, req);
    if (!(pkey = X509_REQ_get_pubkey(req))) { /* adds reference */
        ossl_raise(eX509ReqError, NULL);
    }

    return ossl_pkey_new(pkey); /* NO DUP - OK */
}

static VALUE
ossl_x509req_set_public_key(VALUE self, VALUE key)
{
    X509_REQ *req;
    EVP_PKEY *pkey;

    GetX509Req(self, req);
    pkey = GetPKeyPtr(key);
    ossl_pkey_check_public_key(pkey);
    if (!X509_REQ_set_pubkey(req, pkey))
        ossl_raise(eX509ReqError, "X509_REQ_set_pubkey");
    return key;
}

static VALUE
ossl_x509req_sign(VALUE self, VALUE key, VALUE digest)
{
    X509_REQ *req;
    EVP_PKEY *pkey;
    const EVP_MD *md;

    GetX509Req(self, req);
    pkey = GetPrivPKeyPtr(key); /* NO NEED TO DUP */
    md = GetDigestPtr(digest);
    if (!X509_REQ_sign(req, pkey, md)) {
        ossl_raise(eX509ReqError, NULL);
    }

    return self;
}

static VALUE
ossl_x509req_get_signature_algorithm(VALUE self)
{
    X509_REQ *req;
    const X509_ALGOR *alg;
    BIO *out;

    GetX509Req(self, req);

    if (!(out = BIO_new(BIO_s_mem()))) {
        ossl_raise(eX509ReqError, NULL);
    }
    X509_REQ_get0_signature(req, NULL, &alg);
    if (!i2a_ASN1_OBJECT(out, alg->algorithm)) {
        BIO_free(out);
        ossl_raise(eX509ReqError, NULL);
    }

    return ossl_membio2str(out);
}

static VALUE
ossl_x509req_get_subject(VALUE self)
{
    X509_REQ *req;
    X509_NAME *name;

    GetX509Req(self, req);
    if (!(name = X509_REQ_get_subject_name(req))) { /* NO DUP - don't free */
        ossl_raise(eX509ReqError, NULL);
    }

    return ossl_x509name_new(name);
}

static VALUE
ossl_x509req_set_subject(VALUE self, VALUE subject)
{
    X509_REQ *req;

    GetX509Req(self, req);
    /* DUPs name */
    if (!X509_REQ_set_subject_name(req, GetX509NamePtr(subject))) {
        ossl_raise(eX509ReqError, NULL);
    }

    return subject;
}

static VALUE
ossl_x509req_to_der(VALUE self)
{
    X509_REQ *req;
    VALUE str;
    long len;
    unsigned char *p;

    GetX509Req(self, req);
    if ((len = i2d_X509_REQ(req, NULL)) <= 0)
        ossl_raise(eX509ReqError, NULL);
    str = rb_str_new(0, len);
    p = (unsigned char *)RSTRING_PTR(str);
    if (i2d_X509_REQ(req, &p) <= 0)
        ossl_raise(eX509ReqError, NULL);
    ossl_str_adjust(str, p);

    return str;
}

static VALUE
ossl_x509req_to_pem(VALUE self)
{
    X509_REQ *req;
    BIO *out;

    GetX509Req(self, req);
    if (!(out = BIO_new(BIO_s_mem()))) {
        ossl_raise(eX509ReqError, NULL);
    }
    if (!PEM_write_bio_X509_REQ(out, req)) {
        BIO_free(out);
        ossl_raise(eX509ReqError, NULL);
    }

    return ossl_membio2str(out);
}

static VALUE
ossl_x509req_to_text(VALUE self)
{
    X509_REQ *req;
    BIO *out;

    GetX509Req(self, req);
    if (!(out = BIO_new(BIO_s_mem()))) {
        ossl_raise(eX509ReqError, NULL);
    }
    if (!X509_REQ_print(out, req)) {
        BIO_free(out);
        ossl_raise(eX509ReqError, NULL);
    }

    return ossl_membio2str(out);
}

static VALUE
ossl_x509req_verify(VALUE self, VALUE key)
{
    X509_REQ *req;
    EVP_PKEY *pkey;

    GetX509Req(self, req);
    pkey = GetPKeyPtr(key);
    ossl_pkey_check_public_key(pkey);
    switch (X509_REQ_verify(req, pkey)) {
      case 1:
        return Qtrue;
      case 0:
        ossl_clear_error();
        return Qfalse;
      default:
        ossl_raise(eX509ReqError, NULL);
    }
}

static VALUE
ossl_x509req_get_version(VALUE self)
{
    X509_REQ *req;
    long version;

    GetX509Req(self, req);
    version = X509_REQ_get_version(req);

    return LONG2NUM(version);
}

static VALUE
ossl_x509req_set_version(VALUE self, VALUE version)
{
    X509_REQ *req;
    long ver;

    if ((ver = NUM2LONG(version)) < 0) {
        ossl_raise(eX509ReqError, "version must be >= 0!");
    }
    GetX509Req(self, req);
    if (!X509_REQ_set_version(req, ver)) {
        ossl_raise(eX509ReqError, "X509_REQ_set_version");
    }

    return version;
}