PHP_FUNCTION(openssl_pkcs12_read)
{
	zval *zout = NULL, zextracerts, zcert, zpkey;
	char *pass, *zp12;
	size_t pass_len, zp12_len;
	PKCS12 * p12 = NULL;
	EVP_PKEY * pkey = NULL;
	X509 * cert = NULL;
	STACK_OF(X509) * ca = NULL;
	BIO * bio_in = NULL;
	int i;

	if (zend_parse_parameters(ZEND_NUM_ARGS(), "sz/s", &zp12, &zp12_len, &zout, &pass, &pass_len) == FAILURE)
		return;

	RETVAL_FALSE;

	PHP_OPENSSL_CHECK_SIZE_T_TO_INT(zp12_len, pkcs12);

	bio_in = BIO_new(BIO_s_mem());

	if(0 >= BIO_write(bio_in, zp12, (int)zp12_len))
		goto cleanup;

	if(d2i_PKCS12_bio(bio_in, &p12)) {
		if(PKCS12_parse(p12, pass, &pkey, &cert, &ca)) {
			BIO * bio_out;
			int cert_num;

			zval_dtor(zout);
			array_init(zout);

			if (cert) {
				bio_out = BIO_new(BIO_s_mem());
				if (PEM_write_bio_X509(bio_out, cert)) {
					BUF_MEM *bio_buf;
					BIO_get_mem_ptr(bio_out, &bio_buf);
					ZVAL_STRINGL(&zcert, bio_buf->data, bio_buf->length);
					add_assoc_zval(zout, "cert", &zcert);
				}
				BIO_free(bio_out);
			}

			if (pkey) {
				bio_out = BIO_new(BIO_s_mem());
				if (PEM_write_bio_PrivateKey(bio_out, pkey, NULL, NULL, 0, 0, NULL)) {
					BUF_MEM *bio_buf;
					BIO_get_mem_ptr(bio_out, &bio_buf);
					ZVAL_STRINGL(&zpkey, bio_buf->data, bio_buf->length);
					add_assoc_zval(zout, "pkey", &zpkey);
				}
				BIO_free(bio_out);
			}

			cert_num = sk_X509_num(ca);
			if (ca && cert_num > 0) {

				array_init(&zextracerts);

				for (i=0; i < cert_num; i++) {
					zval zextracert;
					X509* aCA = sk_X509_pop(ca);
					if (!aCA) break;

					/* fix for bug 69882 */
					{
						int err = ERR_peek_error();
						if (err == OPENSSL_ERROR_X509_PRIVATE_KEY_VALUES_MISMATCH) {
							ERR_get_error();
						}
					}

					bio_out = BIO_new(BIO_s_mem());
					if (PEM_write_bio_X509(bio_out, aCA)) {
						BUF_MEM *bio_buf;
						BIO_get_mem_ptr(bio_out, &bio_buf);
						ZVAL_STRINGL(&zextracert, bio_buf->data, bio_buf->length);
						add_index_zval(&zextracerts, i, &zextracert);

					}
					BIO_free(bio_out);

					X509_free(aCA);
				}

				sk_X509_free(ca);
				add_assoc_zval(zout, "extracerts", &zextracerts);
			}

			RETVAL_TRUE;

			PKCS12_free(p12);
		}
	}

	cleanup:
	if (bio_in) {
		BIO_free(bio_in);
	}
	if (pkey) {
		EVP_PKEY_free(pkey);
	}
	if (cert) {
		X509_free(cert);
	}
}

The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.