avivgr / stm32-u2f Goto Github PK

store keys in flash

Need to implement button press

Right now the channels do not expire - and will exhaust the available RAM.

Need to add ->expire field to cid structure and from main loop, free unused cids.

to set attestation key and private keys (EC private key and AES)

The counter is init to 1 and gets reset each time the device is powered.
Need to store counter in NVRAM.

Since STM32 has no eeprom - consider eeprom emulation on top of STM32 flash.

The only thing that makes it variable size is that the DER-encoded signature can be variable size, but adding padding to a DER-encoded blob should not break things.

The issue is found in this line:
uint16_t status, len = sizeof(U2F_AUTHENTICATE_RESP);

I'm trying to compile under OSX. After modifying stm32.mak (update TOOLCHAIN_ROOT, remove .exe from tools, change tool names to arm-none-eabi-*... I'll submit a PR once I get something working), the compile runs all the way to linking.

Then I get this error:

/Users/apowers/Projects/ctap-stm32/gcc-arm-none-eabi-5_4-2016q3//bin/arm-none-eabi-g++ -o Debug/stm32-u2f.elf -Wl,-gc-sections -TBSP/STM32F407VG_flash.lds -mcpu=cortex-m4 -mthumb -mfloat-abi=soft -Wl,--start-group Debug/startup_stm32f407xx.o Debug/stm32f4xx_hal.o Debug/stm32f4xx_hal_adc.o Debug/stm32f4xx_hal_adc_ex.o Debug/stm32f4xx_hal_can.o Debug/stm32f4xx_hal_cec.o Debug/stm32f4xx_hal_cortex.o Debug/stm32f4xx_hal_crc.o Debug/stm32f4xx_hal_cryp.o Debug/stm32f4xx_hal_cryp_ex.o Debug/stm32f4xx_hal_dac.o Debug/stm32f4xx_hal_dac_ex.o Debug/stm32f4xx_hal_dcmi.o Debug/stm32f4xx_hal_dcmi_ex.o Debug/stm32f4xx_hal_dma.o Debug/stm32f4xx_hal_dma2d.o Debug/stm32f4xx_hal_dma_ex.o Debug/stm32f4xx_hal_dsi.o Debug/stm32f4xx_hal_eth.o Debug/stm32f4xx_hal_flash.o Debug/stm32f4xx_hal_flash_ex.o Debug/stm32f4xx_hal_flash_ramfunc.o Debug/stm32f4xx_hal_fmpi2c.o Debug/stm32f4xx_hal_fmpi2c_ex.o Debug/stm32f4xx_hal_gpio.o Debug/stm32f4xx_hal_hash.o Debug/stm32f4xx_hal_hash_ex.o Debug/stm32f4xx_hal_hcd.o Debug/stm32f4xx_hal_i2c.o Debug/stm32f4xx_hal_i2c_ex.o Debug/stm32f4xx_hal_i2s.o Debug/stm32f4xx_hal_i2s_ex.o Debug/stm32f4xx_hal_irda.o Debug/stm32f4xx_hal_iwdg.o Debug/stm32f4xx_hal_lptim.o Debug/stm32f4xx_hal_ltdc.o Debug/stm32f4xx_hal_ltdc_ex.o Debug/stm32f4xx_hal_nand.o Debug/stm32f4xx_hal_nor.o Debug/stm32f4xx_hal_pccard.o Debug/stm32f4xx_hal_pcd.o Debug/stm32f4xx_hal_pcd_ex.o Debug/stm32f4xx_hal_pwr.o Debug/stm32f4xx_hal_pwr_ex.o Debug/stm32f4xx_hal_qspi.o Debug/stm32f4xx_hal_rcc.o Debug/stm32f4xx_hal_rcc_ex.o Debug/stm32f4xx_hal_rng.o Debug/stm32f4xx_hal_rtc.o Debug/stm32f4xx_hal_rtc_ex.o Debug/stm32f4xx_hal_sai.o Debug/stm32f4xx_hal_sai_ex.o Debug/stm32f4xx_hal_sd.o Debug/stm32f4xx_hal_sdram.o Debug/stm32f4xx_hal_smartcard.o Debug/stm32f4xx_hal_spdifrx.o Debug/stm32f4xx_hal_spi.o Debug/stm32f4xx_hal_sram.o Debug/stm32f4xx_hal_tim.o Debug/stm32f4xx_hal_tim_ex.o Debug/stm32f4xx_hal_uart.o Debug/stm32f4xx_hal_usart.o Debug/stm32f4xx_hal_wwdg.o Debug/stm32f4xx_ll_fmc.o Debug/stm32f4xx_ll_fsmc.o Debug/stm32f4xx_ll_sdmmc.o Debug/stm32f4xx_ll_usb.o Debug/usbd_hid.o Debug/usbd_core.o Debug/usbd_ctlreq.o Debug/usbd_ioreq.o Debug/main.o Debug/aes.o Debug/aesni.o Debug/arc4.o Debug/asn1parse.o Debug/asn1write.o Debug/base64.o Debug/bignum.o Debug/blowfish.o Debug/camellia.o Debug/ccm.o Debug/certs.o Debug/cipher.o Debug/cipher_wrap.o Debug/ctr_drbg.o Debug/debug.o Debug/des.o Debug/dhm.o Debug/ecdh.o Debug/ecdsa.o Debug/ecjpake.o Debug/ecp.o Debug/ecp_curves.o Debug/entropy.o Debug/entropy_poll.o Debug/error.o Debug/gcm.o Debug/havege.o Debug/hmac_drbg.o Debug/md.o Debug/md2.o Debug/md4.o Debug/md5.o Debug/md_wrap.o Debug/memory_buffer_alloc.o Debug/oid.o Debug/padlock.o Debug/pem.o Debug/pk.o Debug/pkcs11.o Debug/pkcs12.o Debug/pkcs5.o Debug/pkparse.o Debug/pkwrite.o Debug/pk_wrap.o Debug/platform.o Debug/ripemd160.o Debug/rsa.o Debug/sha1.o Debug/sha256.o Debug/sha512.o Debug/ssl_cache.o Debug/ssl_ciphersuites.o Debug/ssl_cli.o Debug/ssl_cookie.o Debug/ssl_srv.o Debug/ssl_ticket.o Debug/ssl_tls.o Debug/threading.o Debug/timing.o Debug/version.o Debug/version_features.o Debug/x509.o Debug/x509write_crt.o Debug/x509write_csr.o Debug/x509_create.o Debug/x509_crl.o Debug/x509_crt.o Debug/x509_csr.o Debug/xtea.o Debug/stm32f4xx_hal_msp.o Debug/stm32f4xx_it.o Debug/stm32_entropy.o Debug/system_stm32f4xx.o Debug/u2f_messages.o Debug/uart_printf.o Debug/usbd_conf.o Debug/usbd_desc.o Debug/usbd_u2fhid.o Debug/usbd_u2f_hid_if.o Debug/usb_device.o -lcompactcpp -Wl,--end-group
/Users/apowers/Projects/ctap-stm32/gcc-arm-none-eabi-5_4-2016q3/bin/../lib/gcc/arm-none-eabi/5.4.1/../../../../arm-none-eabi/bin/ld: cannot find -lcompactcpp
collect2: error: ld returned 1 exit status

All I see is that stm32.mak adds compactcpp to LIBRARY_NAMES... I'm not quite sure where to pick up this library so that I can link it in.

Any hints would be appreciated.