[RFC PATCH v2 1/9] mbedtls: enable support of ecc
Philippe Reynes
philippe.reynes at softathome.com
Tue Mar 31 15:00:41 CEST 2026
Hi Raymond,
Sorry for this very later answer.
Le 20/02/2026 à 16:18, Raymond Mao a écrit :
> This Mail comes from Outside of SoftAtHome: Do not answer, click links or open attachments unless you recognize the sender and know the content is safe.
>
> Hi Philippe,
>
> On Thu, Feb 19, 2026 at 8:26 AM Philippe Reynes
> <philippe.reynes at softathome.com> wrote:
>> Enables the support of ecc in mbedtls.
>>
>> Signed-off-by: Philippe Reynes <philippe.reynes at softathome.com>
>> ---
>> v2:
>> - move ecdsa to MBEDTLS_LIB_X509
>> - enhance depencendies
>>
>> configs/amd_versal2_virt_defconfig | 1 +
>> configs/qemu_arm64_lwip_defconfig | 1 +
>> configs/starfive_visionfive2_defconfig | 1 +
>> configs/xilinx_versal_net_virt_defconfig | 1 +
>> configs/xilinx_versal_virt_defconfig | 1 +
>> configs/xilinx_zynqmp_kria_defconfig | 1 +
>> configs/xilinx_zynqmp_virt_defconfig | 1 +
>> lib/mbedtls/Kconfig | 16 ++++++++++++++++
>> lib/mbedtls/Makefile | 16 +++++++++-------
>> lib/mbedtls/mbedtls_def_config.h | 18 ++++++++++++++++++
>> 10 files changed, 50 insertions(+), 7 deletions(-)
>>
>> diff --git a/configs/amd_versal2_virt_defconfig b/configs/amd_versal2_virt_defconfig
>> index 0344089030c..702bf28405d 100644
>> --- a/configs/amd_versal2_virt_defconfig
>> +++ b/configs/amd_versal2_virt_defconfig
>> @@ -164,6 +164,7 @@ CONFIG_VIRTIO_MMIO=y
>> CONFIG_VIRTIO_NET=y
>> CONFIG_VIRTIO_BLK=y
>> CONFIG_MBEDTLS_LIB=y
>> +CONFIG_ECDSA=y
>> CONFIG_TPM=y
>> # CONFIG_OPTEE_LIB is not set
>> CONFIG_TOOLS_MKFWUMDATA=y
>> diff --git a/configs/qemu_arm64_lwip_defconfig b/configs/qemu_arm64_lwip_defconfig
>> index a974970c3d3..ab6302b67eb 100644
>> --- a/configs/qemu_arm64_lwip_defconfig
>> +++ b/configs/qemu_arm64_lwip_defconfig
>> @@ -11,3 +11,4 @@ CONFIG_CMD_WGET=y
>> CONFIG_EFI_HTTP_BOOT=y
>> CONFIG_WGET_HTTPS=y
>> CONFIG_WGET_CACERT=y
>> +CONFIG_ECDSA=y
>> diff --git a/configs/starfive_visionfive2_defconfig b/configs/starfive_visionfive2_defconfig
>> index a754134a313..508bd465704 100644
>> --- a/configs/starfive_visionfive2_defconfig
>> +++ b/configs/starfive_visionfive2_defconfig
>> @@ -156,3 +156,4 @@ CONFIG_USB_GADGET=y
>> CONFIG_WDT=y
>> CONFIG_WDT_STARFIVE=y
>> CONFIG_MBEDTLS_LIB=y
>> +CONFIG_ECDSA=y
>> diff --git a/configs/xilinx_versal_net_virt_defconfig b/configs/xilinx_versal_net_virt_defconfig
>> index 323b5606566..8b760beab03 100644
>> --- a/configs/xilinx_versal_net_virt_defconfig
>> +++ b/configs/xilinx_versal_net_virt_defconfig
>> @@ -154,4 +154,5 @@ CONFIG_VIRTIO_MMIO=y
>> CONFIG_VIRTIO_NET=y
>> CONFIG_VIRTIO_BLK=y
>> CONFIG_MBEDTLS_LIB=y
>> +CONFIG_ECDSA=y
>> CONFIG_TPM=y
>> diff --git a/configs/xilinx_versal_virt_defconfig b/configs/xilinx_versal_virt_defconfig
>> index 652121e27a0..6dd8620cf51 100644
>> --- a/configs/xilinx_versal_virt_defconfig
>> +++ b/configs/xilinx_versal_virt_defconfig
>> @@ -168,5 +168,6 @@ CONFIG_VIRTIO_MMIO=y
>> CONFIG_VIRTIO_NET=y
>> CONFIG_VIRTIO_BLK=y
>> CONFIG_MBEDTLS_LIB=y
>> +CONFIG_ECDSA=y
>> CONFIG_TPM=y
>> CONFIG_TOOLS_MKFWUMDATA=y
>> diff --git a/configs/xilinx_zynqmp_kria_defconfig b/configs/xilinx_zynqmp_kria_defconfig
>> index 8ad05e37189..d23452e96d0 100644
>> --- a/configs/xilinx_zynqmp_kria_defconfig
>> +++ b/configs/xilinx_zynqmp_kria_defconfig
>> @@ -219,6 +219,7 @@ CONFIG_VIRTIO_BLK=y
>> CONFIG_BINMAN_DTB="./arch/arm/dts/zynqmp-binman-som.dtb"
>> CONFIG_PANIC_HANG=y
>> CONFIG_MBEDTLS_LIB=y
>> +CONFIG_ECDSA=y
>> CONFIG_TPM=y
>> CONFIG_SPL_GZIP=y
>> CONFIG_TOOLS_MKFWUMDATA=y
>> diff --git a/configs/xilinx_zynqmp_virt_defconfig b/configs/xilinx_zynqmp_virt_defconfig
>> index bb79ddf989e..01370a215d4 100644
>> --- a/configs/xilinx_zynqmp_virt_defconfig
>> +++ b/configs/xilinx_zynqmp_virt_defconfig
>> @@ -237,6 +237,7 @@ CONFIG_VIRTIO_BLK=y
>> CONFIG_BINMAN_DTB="./arch/arm/dts/zynqmp-binman.dtb"
>> CONFIG_PANIC_HANG=y
>> CONFIG_MBEDTLS_LIB=y
>> +CONFIG_ECDSA=y
>> CONFIG_TPM=y
>> CONFIG_SPL_GZIP=y
>> CONFIG_TOOLS_MKFWUMDATA=y
>> diff --git a/lib/mbedtls/Kconfig b/lib/mbedtls/Kconfig
>> index 789721ee6cd..8bf8809198f 100644
>> --- a/lib/mbedtls/Kconfig
>> +++ b/lib/mbedtls/Kconfig
>> @@ -242,11 +242,16 @@ config MBEDTLS_LIB_X509
>> select X509_CERTIFICATE_PARSER_MBEDTLS if X509_CERTIFICATE_PARSER
>> select PKCS7_MESSAGE_PARSER_MBEDTLS if PKCS7_MESSAGE_PARSER
>> select MSCODE_PARSER_MBEDTLS if MSCODE_PARSER
>> + select ECDSA_MBEDTLS if ECDSA
>> help
>> Enable MbedTLS certificate libraries.
>>
>> if MBEDTLS_LIB_X509
>>
>> +config BIGNUM_MBEDTLS
>> + bool
>> + default n
>> +
>> config ASN1_DECODER_MBEDTLS
>> bool "ASN1 decoder with MbedTLS certificate library"
>> depends on MBEDTLS_LIB_X509 && ASN1_DECODER
>> @@ -264,6 +269,7 @@ config RSA_PUBLIC_KEY_PARSER_MBEDTLS
>> bool "RSA public key parser with MbedTLS certificate library"
>> depends on ASYMMETRIC_PUBLIC_KEY_MBEDTLS
>> select ASN1_DECODER_MBEDTLS
>> + select BIGNUM_MBEDTLS
>> help
>> This option chooses MbedTLS certificate library for RSA public key
>> parser.
>> @@ -292,6 +298,15 @@ config MSCODE_PARSER_MBEDTLS
>> This option chooses MbedTLS certificate library for MS authenticode
>> parser.
>>
>> +config ECDSA_MBEDTLS
>> + bool "Enable ECDSA support with MbedTLS certificate library"
>> + depends on MBEDTLS_LIB_X509
>> + select ASN1_DECODER
> This should be ASN1_DECODER_MBEDTLS.
It was my first try, but I reach an issue.
If ASN1_DECODER is not selected and we select ASN1_DECODER_MBEDTLS,
there is a conflict because
ASN1_DECODER_MBEDTLS depends on ASN1_DECODER. So to avoid this issue, I
have kept ASN1_DECODER in V3.
Regards,
Philippe
>
>
>> + select BIGNUM_MBEDTLS
>> + help
>> + This option enables support of ECDSA with the MbedTLS certificate
>> + library.
>> +
>> endif # MBEDTLS_LIB_X509
>>
>> config MBEDTLS_LIB_TLS
>> @@ -301,6 +316,7 @@ config MBEDTLS_LIB_TLS
>> depends on ASYMMETRIC_PUBLIC_KEY_MBEDTLS
>> depends on ASN1_DECODER_MBEDTLS
>> depends on MBEDTLS_LIB
>> + depends on ECDSA_MBEDTLS
>> help
>> Enable MbedTLS TLS library. Required for HTTPs support
>> in wget
>> diff --git a/lib/mbedtls/Makefile b/lib/mbedtls/Makefile
>> index c5b445bd85c..5433e17cc64 100644
>> --- a/lib/mbedtls/Makefile
>> +++ b/lib/mbedtls/Makefile
>> @@ -39,13 +39,14 @@ mbedtls_lib_crypto-$(CONFIG_$(PHASE_)HKDF_MBEDTLS) += \
>> # MbedTLS X509 library
>> obj-$(CONFIG_$(XPL_)MBEDTLS_LIB_X509) += mbedtls_lib_x509.o
>> mbedtls_lib_x509-y := $(MBEDTLS_LIB_DIR)/x509.o
>> +mbedtls_lib_x509-$(CONFIG_$(PHASE_)BIGNUM_MBEDTLS) += \
>> + $(MBEDTLS_LIB_DIR)/bignum.o \
>> + $(MBEDTLS_LIB_DIR)/bignum_core.o
>> mbedtls_lib_x509-$(CONFIG_$(PHASE_)ASN1_DECODER_MBEDTLS) += \
>> $(MBEDTLS_LIB_DIR)/asn1parse.o \
>> $(MBEDTLS_LIB_DIR)/asn1write.o \
>> $(MBEDTLS_LIB_DIR)/oid.o
>> mbedtls_lib_x509-$(CONFIG_$(PHASE_)RSA_PUBLIC_KEY_PARSER_MBEDTLS) += \
>> - $(MBEDTLS_LIB_DIR)/bignum.o \
>> - $(MBEDTLS_LIB_DIR)/bignum_core.o \
>> $(MBEDTLS_LIB_DIR)/rsa.o \
>> $(MBEDTLS_LIB_DIR)/rsa_alt_helpers.o
>> mbedtls_lib_x509-$(CONFIG_$(PHASE_)ASYMMETRIC_PUBLIC_KEY_MBEDTLS) += \
>> @@ -57,6 +58,12 @@ mbedtls_lib_x509-$(CONFIG_$(PHASE_)X509_CERTIFICATE_PARSER_MBEDTLS) += \
>> $(MBEDTLS_LIB_DIR)/x509_crt.o
>> mbedtls_lib_x509-$(CONFIG_$(PHASE_)PKCS7_MESSAGE_PARSER_MBEDTLS) += \
>> $(MBEDTLS_LIB_DIR)/pkcs7.o
>> +mbedtls_lib_x509-$(CONFIG_$(PHASE_)ECDSA_MBEDTLS) += \
>> + $(MBEDTLS_LIB_DIR)/ecdsa.o \
>> + $(MBEDTLS_LIB_DIR)/ecp.o \
>> + $(MBEDTLS_LIB_DIR)/ecp_curves.o \
>> + $(MBEDTLS_LIB_DIR)/ecp_curves_new.o \
>> + $(MBEDTLS_LIB_DIR)/pk_ecc.o
>>
>> #mbedTLS TLS support
>> obj-$(CONFIG_$(XPL_)MBEDTLS_LIB_TLS) += mbedtls_lib_tls.o
>> @@ -64,7 +71,6 @@ mbedtls_lib_tls-y := \
>> $(MBEDTLS_LIB_DIR)/mps_reader.o \
>> $(MBEDTLS_LIB_DIR)/mps_trace.o \
>> $(MBEDTLS_LIB_DIR)/net_sockets.o \
>> - $(MBEDTLS_LIB_DIR)/pk_ecc.o \
>> $(MBEDTLS_LIB_DIR)/ssl_cache.o \
>> $(MBEDTLS_LIB_DIR)/ssl_ciphersuites.o \
>> $(MBEDTLS_LIB_DIR)/ssl_client.o \
>> @@ -82,8 +88,4 @@ mbedtls_lib_tls-y := \
>> $(MBEDTLS_LIB_DIR)/cipher.o \
>> $(MBEDTLS_LIB_DIR)/cipher_wrap.o \
>> $(MBEDTLS_LIB_DIR)/ecdh.o \
>> - $(MBEDTLS_LIB_DIR)/ecdsa.o \
>> - $(MBEDTLS_LIB_DIR)/ecp.o \
>> - $(MBEDTLS_LIB_DIR)/ecp_curves.o \
>> - $(MBEDTLS_LIB_DIR)/ecp_curves_new.o \
>> $(MBEDTLS_LIB_DIR)/gcm.o \
>> diff --git a/lib/mbedtls/mbedtls_def_config.h b/lib/mbedtls/mbedtls_def_config.h
>> index dda3f4dd6e4..7d60bcc52aa 100644
>> --- a/lib/mbedtls/mbedtls_def_config.h
>> +++ b/lib/mbedtls/mbedtls_def_config.h
>> @@ -89,6 +89,24 @@
>> #define MBEDTLS_ASN1_WRITE_C
>> #endif
>>
>> +#if CONFIG_IS_ENABLED(ECDSA_MBEDTLS)
> In the 'mbedtls_def_config.h' file, we use the kconfigs without the
> '_MBEDTLS' postfix.
>
> Regards,
> Raymond
>
>> +#define MBEDTLS_ECDSA_C
>> +#define MBEDTLS_ECP_C
>> +#define MBEDTLS_BIGNUM_C
>> +#define MBEDTLS_ECP_DP_SECP256K1_ENABLED
>> +#define MBEDTLS_ECP_DP_SECP192R1_ENABLED
>> +#define MBEDTLS_ECP_DP_SECP224R1_ENABLED
>> +#define MBEDTLS_ECP_DP_SECP256R1_ENABLED
>> +#define MBEDTLS_ECP_DP_SECP384R1_ENABLED
>> +#define MBEDTLS_ECP_DP_SECP521R1_ENABLED
>> +#define MBEDTLS_ECP_DP_SECP192K1_ENABLED
>> +#define MBEDTLS_ECP_DP_SECP224K1_ENABLED
>> +#define MBEDTLS_ECP_DP_SECP256K1_ENABLED
>> +#define MBEDTLS_ECP_DP_BP256R1_ENABLED
>> +#define MBEDTLS_ECP_DP_BP384R1_ENABLED
>> +#define MBEDTLS_ECP_DP_BP512R1_ENABLED
>> +#endif
>> +
>> #endif /* #if CONFIG_IS_ENABLED(MBEDTLS_LIB_X509) */
>>
>> #if CONFIG_IS_ENABLED(MBEDTLS_LIB_TLS)
>> --
>> 2.43.0
>>
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