mirror of https://github.com/wolfSSL/wolfssl.git
Add VaultIC wolfCrypt crypto callback (devId) support
David Garske
parent
10c6296552
commit
fdc8fbc078
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@ -694,6 +694,7 @@ USE_TLSV13
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USE_WINDOWS_API
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USE_WOLF_STRNSTR
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USS_API
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VLT_TLS_NO_ECDH
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W64LIT_FORCE_LONG_LONG
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WC_AESXTS_STREAM_NO_REQUEST_ACCOUNTING
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WC_AES_BS_WORD_SIZE
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@ -524,9 +524,11 @@ endif()
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add_option("WOLFSSL_VAULTIC" "Enable WISeKey/SealSQ VaultIC support (default: disabled)" "no" "yes;no")
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if(WOLFSSL_VAULTIC)
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list(APPEND WOLFSSL_DEFINITIONS "-DWOLFSSL_VAULTIC")
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# VaultIC port requires PK callbacks (mirror autotools --enable-vaultic).
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# WOLFSSL_PKCALLBACKS is declared later, so force it before its add_option().
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# VaultIC port supports PK callbacks and crypto callbacks (mirror autotools
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# --enable-vaultic). These options are declared later, so force them before
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# their add_option() calls.
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force_option(WOLFSSL_PKCALLBACKS "yes")
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force_option(WOLFSSL_CRYPTOCB "yes")
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endif()
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add_option("WOLFSSL_WOLFSENTRY" "Enable wolfSentry support (default: disabled)" "no" "yes;no")
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@ -12615,11 +12615,15 @@ if test "$ENABLED_VAULTIC" != "no"
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then
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AM_CFLAGS="$AM_CFLAGS -DWOLFSSL_VAULTIC"
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ENABLED_VAULTIC=yes
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# VaultIC port is implemented via PK callbacks
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# VaultIC port supports TLS PK callbacks and wolfCrypt crypto callbacks
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if test "$ENABLED_PKCALLBACKS" = "no"; then
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ENABLED_PKCALLBACKS=yes
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AM_CFLAGS="$AM_CFLAGS -DHAVE_PK_CALLBACKS"
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fi
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if test "$ENABLED_CRYPTOCB" = "no"; then
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ENABLED_CRYPTOCB=yes
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AM_CFLAGS="$AM_CFLAGS -DWOLF_CRYPTO_CB"
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fi
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fi
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if test "x$ENABLED_WOLFENGINE" = "xyes"
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@ -50,8 +50,11 @@ separate target (for example the SealSQ devkit builds it into its own
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`vaultic_wolfssl` library alongside an `add_subdirectory(wolfssl)` CMake
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build), two things are required so the file sees the wolfSSL configuration:
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* Define `WOLFSSL_USE_OPTIONS_H` when compiling `vaultic.c`, so
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`settings.h` pulls in the generated `wolfssl/options.h`. Without it the
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* Make the file see the wolfSSL configuration. For an autotools build define
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`WOLFSSL_USE_OPTIONS_H`, so `settings.h` pulls in the generated
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`wolfssl/options.h`. For a build that does not use `./configure` (so there is
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no generated `options.h`), define `WOLFSSL_USER_SETTINGS` instead and provide
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a `user_settings.h` that lists all the build options. Without one of these the
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wolfSSL headers fall back to defaults (`ecc_key` is incomplete,
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`ECC_SECP256R1` is undeclared).
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* Enable PK callbacks through the wolfSSL build option
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@ -62,6 +65,11 @@ build), two things are required so the file sees the wolfSSL configuration:
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## Usage
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The port offers two ways to route ECC to the chip. They can be used
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independently or together.
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### TLS PK callbacks
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```c
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WOLFSSL_CTX* ctx = wolfSSL_CTX_new(wolfTLS_client_method());
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@ -76,9 +84,34 @@ WOLFSSL_VAULTIC_SetupPkCallbackCtx(ssl, NULL);
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/* ... proceed with the TLS handshake ... */
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```
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The VaultIC-TLS SDK must be initialized (`vlt_tls_init()`) before the
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handshake and closed (`vlt_tls_close()`) afterwards; see the SealSQ devkit
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sample applications.
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### Crypto callback (devId)
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The crypto callback dispatches wolfCrypt ECC operations (not just the TLS
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handshake) to the VaultIC through the `WOLF_CRYPTO_CB` / devId framework.
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Register the device once, then select it with a devId:
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```c
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/* register the VaultIC crypto callback under a devId */
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WOLFSSL_VAULTIC_RegisterCryptoCb(WOLF_VAULTIC_DEVID);
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/* TLS: route this CTX's crypto to the device */
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wolfSSL_CTX_SetDevId(ctx, WOLF_VAULTIC_DEVID);
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/* or bare wolfCrypt: init a key against the device */
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wc_ecc_init_ex(&key, NULL, WOLF_VAULTIC_DEVID);
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```
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The VaultIC-TLS SDK must be initialized (`vlt_tls_init()`) before use and
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closed (`vlt_tls_close()`) afterwards; see the SealSQ devkit sample
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applications.
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### Curve support
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The port offloads P-256 (SECP256R1) only. The VaultIC 408 silicon supports
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P-384, but the vendor `vlt_tls` API exposes P-256 entry points only, so
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P-384 would require vendor `vlt_tls_*_P384` functions. For any other curve
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the crypto callback returns `CRYPTOCB_UNAVAILABLE` and the PK callbacks
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return `NOT_COMPILED_IN`, so wolfSSL falls back to software.
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## Building and provisioning with the SealSQ devkit
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@ -33,8 +33,8 @@
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#ifdef WOLFSSL_VAULTIC
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#ifndef HAVE_PK_CALLBACKS
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#error WOLFSSL_VAULTIC requires HAVE_PK_CALLBACKS
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#if !defined(HAVE_PK_CALLBACKS) && !defined(WOLF_CRYPTO_CB)
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#error WOLFSSL_VAULTIC requires HAVE_PK_CALLBACKS or WOLF_CRYPTO_CB
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#endif
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#include <wolfssl/wolfcrypt/ecc.h>
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@ -42,11 +42,64 @@
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#include <wolfssl/ssl.h>
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#include <wolfssl/wolfcrypt/logging.h>
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#include <wolfssl/wolfcrypt/port/sealsq/vaultic.h>
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#ifdef WOLF_CRYPTO_CB
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#include <wolfssl/wolfcrypt/cryptocb.h>
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#endif
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#include "vaultic_tls.h" /* vendor VaultIC-TLS SDK (external) */
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#define P256_BYTE_SZ 32
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/* Verify a P-256 ECDSA signature on the VaultIC. Shared by the PK verify
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* callback and the crypto callback. Sets *result=1 and returns 0 on a valid
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* signature; returns WC_HW_E if the device rejects it; returns other wolfCrypt
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* errors on encode/decode failure. */
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static int vaultic_p256_verify(ecc_key* key, const byte* hash, word32 hashSz,
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const byte* sig, word32 sigSz, int* result)
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{
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int err;
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byte signature[2*P256_BYTE_SZ] = {0};
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byte *r, *s;
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word32 r_len = P256_BYTE_SZ, s_len = P256_BYTE_SZ;
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byte pubKeyX[P256_BYTE_SZ] = {0};
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byte pubKeyY[P256_BYTE_SZ] = {0};
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word32 pubKeyX_len = sizeof(pubKeyX);
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word32 pubKeyY_len = sizeof(pubKeyY);
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*result = 0;
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/* Extract raw X and Y coordinates of the public key */
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if ((err = wc_ecc_export_public_raw(key, pubKeyX, &pubKeyX_len,
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pubKeyY, &pubKeyY_len)) != 0) {
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WOLFSSL_MSG("wc_ecc_export_public_raw");
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return err;
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}
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vlt_tls_left_pad_P256(pubKeyX, pubKeyX_len);
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vlt_tls_left_pad_P256(pubKeyY, pubKeyY_len);
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/* Extract R and S from the signature */
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r = &signature[0];
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s = &signature[sizeof(signature)/2];
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if ((err = wc_ecc_sig_to_rs(sig, sigSz, r, &r_len, s, &s_len)) != 0) {
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WOLFSSL_MSG("wc_ecc_sig_to_rs");
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return err;
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}
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vlt_tls_left_pad_P256(r, r_len);
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vlt_tls_left_pad_P256(s, s_len);
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/* Verify signature with the VaultIC */
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if (vlt_tls_verify_signature_P256(hash, hashSz, signature, pubKeyX,
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pubKeyY) != 0) {
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WOLFSSL_MSG("vlt_tls_verify_signature_P256");
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return WC_HW_E;
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}
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*result = 1;
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return 0;
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}
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#ifdef HAVE_PK_CALLBACKS
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#ifndef VLT_TLS_NO_ECDH
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/**
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* \brief Key Gen Callback (used by TLS server)
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@ -100,13 +153,6 @@ int WOLFSSL_VAULTIC_EccVerifyCb(WOLFSSL* ssl,
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int* result, void* ctx)
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{
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int err;
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byte signature[2*P256_BYTE_SZ] = {0};
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byte *r, *s;
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word32 r_len = P256_BYTE_SZ, s_len = P256_BYTE_SZ;
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byte pubKeyX[P256_BYTE_SZ] = {0};
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byte pubKeyY[P256_BYTE_SZ] = {0};
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word32 pubKeyX_len = sizeof(pubKeyX);
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word32 pubKeyY_len = sizeof(pubKeyY);
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ecc_key key;
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word32 inOutIdx = 0;
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@ -132,18 +178,6 @@ int WOLFSSL_VAULTIC_EccVerifyCb(WOLFSSL* ssl,
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return err;
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}
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/* Extract Raw X and Y coordinates of the public key */
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if ((err = wc_ecc_export_public_raw(&key, pubKeyX, &pubKeyX_len,
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pubKeyY, &pubKeyY_len)) != 0) {
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WOLFSSL_MSG("wc_ecc_export_public_raw");
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wc_ecc_free(&key);
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return err;
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}
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/* Left pad public key */
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vlt_tls_left_pad_P256(pubKeyX, pubKeyX_len);
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vlt_tls_left_pad_P256(pubKeyY, pubKeyY_len);
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/* Check requested curve */
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if (key.dp->id != ECC_SECP256R1) {
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WOLFSSL_MSG("id != ECC_SECP256R1");
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@ -151,31 +185,10 @@ int WOLFSSL_VAULTIC_EccVerifyCb(WOLFSSL* ssl,
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return NOT_COMPILED_IN;
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}
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/* Extract R and S from signature */
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XMEMSET(signature, 0, sizeof(signature));
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r = &signature[0];
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s = &signature[sizeof(signature)/2];
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err = wc_ecc_sig_to_rs(sig, sigSz, r, &r_len, s, &s_len);
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err = vaultic_p256_verify(&key, hash, hashSz, sig, sigSz, result);
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wc_ecc_free(&key);
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if (err != 0) {
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WOLFSSL_MSG("wc_ecc_sig_to_rs");
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return err;
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}
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/* Left pad r & s */
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vlt_tls_left_pad_P256(r, r_len);
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vlt_tls_left_pad_P256(s, s_len);
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/* Verify signature with VaultIC */
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if (vlt_tls_verify_signature_P256(hash, hashSz, signature, pubKeyX,
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pubKeyY) != 0) {
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WOLFSSL_MSG("vlt_tls_verify_signature_P256");
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return WC_HW_E;
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}
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else {
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*result = 1;
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return 0;
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}
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return err;
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}
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@ -330,7 +343,9 @@ int WOLFSSL_VAULTIC_EccSharedSecretCb(WOLFSSL* ssl, ecc_key* otherPubKey,
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return 0;
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}
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#endif
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#endif /* VLT_TLS_NO_ECDH */
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#endif /* HAVE_PK_CALLBACKS */
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/**
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* \brief Read VaultIC Certificates and add them to wolfssl context
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@ -425,7 +440,7 @@ free_cert_buffers:
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return ret;
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}
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#ifdef HAVE_PK_CALLBACKS
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int WOLFSSL_VAULTIC_SetupPkCallbacks(WOLFSSL_CTX* ctx)
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{
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wolfSSL_CTX_SetEccSignCb(ctx, WOLFSSL_VAULTIC_EccSignCb);
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@ -447,5 +462,138 @@ int WOLFSSL_VAULTIC_SetupPkCallbackCtx(WOLFSSL* ssl, void* user_ctx)
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wolfSSL_SetEccVerifyCtx(ssl, user_ctx);
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return 0;
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}
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#endif /* HAVE_PK_CALLBACKS */
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#ifdef WOLF_CRYPTO_CB
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/**
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* \brief wolfCrypt crypto callback. Dispatches ECC P-256 operations to the
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* VaultIC. Register with WOLFSSL_VAULTIC_RegisterCryptoCb() and select
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* it with a devId (wolfSSL_CTX_SetDevId / wc_ecc_init_ex). Unsupported
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* curves and operations return CRYPTOCB_UNAVAILABLE so wolfCrypt falls
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* back to software. Note: the VaultIC 408 silicon supports P-384, but
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* the vendor vlt_tls API exposes P-256 only, so P-384 is not offloaded.
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*/
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int WOLFSSL_VAULTIC_CryptoCb(int devId, wc_CryptoInfo* info, void* ctx)
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{
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int rc = CRYPTOCB_UNAVAILABLE;
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(void)devId;
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(void)ctx;
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if (info == NULL) {
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return BAD_FUNC_ARG;
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}
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if (info->algo_type != WC_ALGO_TYPE_PK) {
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return CRYPTOCB_UNAVAILABLE;
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}
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switch (info->pk.type) {
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case WC_PK_TYPE_ECDSA_SIGN:
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{
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byte sig_R[P256_BYTE_SZ] = {0};
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byte sig_S[P256_BYTE_SZ] = {0};
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WOLFSSL_MSG("WOLFSSL_VAULTIC_CryptoCb: ECDSA sign");
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if (info->pk.eccsign.key == NULL ||
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info->pk.eccsign.key->dp == NULL ||
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info->pk.eccsign.key->dp->id != ECC_SECP256R1) {
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/* P-384 is a vendor vlt_tls gap; let software handle it */
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break;
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}
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if (vlt_tls_compute_signature_P256(info->pk.eccsign.in,
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info->pk.eccsign.inlen, sig_R, sig_S) != 0) {
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WOLFSSL_MSG("vlt_tls_compute_signature_P256");
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rc = WC_HW_E;
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break;
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}
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rc = wc_ecc_rs_raw_to_sig(sig_R, P256_BYTE_SZ, sig_S, P256_BYTE_SZ,
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info->pk.eccsign.out, info->pk.eccsign.outlen);
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break;
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}
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case WC_PK_TYPE_ECDSA_VERIFY:
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WOLFSSL_MSG("WOLFSSL_VAULTIC_CryptoCb: ECDSA verify");
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if (info->pk.eccverify.key == NULL ||
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info->pk.eccverify.key->dp == NULL ||
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info->pk.eccverify.key->dp->id != ECC_SECP256R1) {
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break;
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}
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rc = vaultic_p256_verify(info->pk.eccverify.key,
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info->pk.eccverify.hash, info->pk.eccverify.hashlen,
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info->pk.eccverify.sig, info->pk.eccverify.siglen,
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info->pk.eccverify.res);
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break;
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#ifndef VLT_TLS_NO_ECDH
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case WC_PK_TYPE_ECDH:
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{
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byte peerX[P256_BYTE_SZ] = {0};
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byte peerY[P256_BYTE_SZ] = {0};
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word32 peerX_len = sizeof(peerX);
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word32 peerY_len = sizeof(peerY);
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WOLFSSL_MSG("WOLFSSL_VAULTIC_CryptoCb: ECDH");
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if (info->pk.ecdh.private_key == NULL ||
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info->pk.ecdh.private_key->dp == NULL ||
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info->pk.ecdh.private_key->dp->id != ECC_SECP256R1) {
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break;
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}
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if ((rc = wc_ecc_export_public_raw(info->pk.ecdh.public_key,
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peerX, &peerX_len, peerY, &peerY_len)) != 0) {
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WOLFSSL_MSG("wc_ecc_export_public_raw");
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break;
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}
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vlt_tls_left_pad_P256(peerX, peerX_len);
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vlt_tls_left_pad_P256(peerY, peerY_len);
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if (vlt_tls_compute_shared_secret_P256(peerX, peerY,
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info->pk.ecdh.out) != 0) {
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WOLFSSL_MSG("vlt_tls_compute_shared_secret_P256");
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rc = WC_HW_E;
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break;
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}
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*info->pk.ecdh.outlen = P256_BYTE_SZ;
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rc = 0;
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break;
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}
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case WC_PK_TYPE_EC_KEYGEN:
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{
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byte pubKeyX[P256_BYTE_SZ] = {0};
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byte pubKeyY[P256_BYTE_SZ] = {0};
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WOLFSSL_MSG("WOLFSSL_VAULTIC_CryptoCb: EC keygen");
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if (info->pk.eckg.curveId != ECC_SECP256R1) {
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break;
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}
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if (vlt_tls_keygen_P256(pubKeyX, pubKeyY) != 0) {
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WOLFSSL_MSG("vlt_tls_keygen_P256");
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rc = WC_HW_E;
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break;
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}
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rc = wc_ecc_import_unsigned(info->pk.eckg.key, pubKeyX, pubKeyY,
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NULL, ECC_SECP256R1);
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break;
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}
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#endif /* VLT_TLS_NO_ECDH */
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default:
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/* rc stays CRYPTOCB_UNAVAILABLE -> software fallback */
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break;
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}
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return rc;
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}
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/**
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* \brief Register the VaultIC crypto callback for the given devId.
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*/
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int WOLFSSL_VAULTIC_RegisterCryptoCb(int devId)
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{
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return wc_CryptoCb_RegisterDevice(devId, WOLFSSL_VAULTIC_CryptoCb, NULL);
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}
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#endif /* WOLF_CRYPTO_CB */
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#endif /* WOLFSSL_VAULTIC */
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@ -30,11 +30,15 @@
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|
||||
#include <wolfssl/ssl.h>
|
||||
#include <wolfssl/wolfcrypt/ecc.h>
|
||||
#ifdef WOLF_CRYPTO_CB
|
||||
#include <wolfssl/wolfcrypt/cryptocb.h>
|
||||
#endif
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
#ifdef HAVE_PK_CALLBACKS
|
||||
WOLFSSL_API int WOLFSSL_VAULTIC_EccKeyGenCb(WOLFSSL* ssl, ecc_key* key,
|
||||
word32 keySz, int ecc_curve, void* ctx);
|
||||
|
||||
|
|
@ -54,12 +58,25 @@ WOLFSSL_API int WOLFSSL_VAULTIC_EccSharedSecretCb(WOLFSSL* ssl,
|
|||
unsigned char* pubKeyDer, unsigned int* pubKeySz,
|
||||
unsigned char* out, unsigned int* outlen,
|
||||
int side, void* ctx);
|
||||
#endif /* HAVE_PK_CALLBACKS */
|
||||
|
||||
WOLFSSL_API int WOLFSSL_VAULTIC_LoadCertificates(WOLFSSL_CTX* ctx);
|
||||
|
||||
/* Helper APIs for setting up callbacks */
|
||||
#ifdef HAVE_PK_CALLBACKS
|
||||
/* Helper APIs for setting up PK callbacks */
|
||||
WOLFSSL_API int WOLFSSL_VAULTIC_SetupPkCallbacks(WOLFSSL_CTX* ctx);
|
||||
WOLFSSL_API int WOLFSSL_VAULTIC_SetupPkCallbackCtx(WOLFSSL* ssl, void* user_ctx);
|
||||
WOLFSSL_API int WOLFSSL_VAULTIC_SetupPkCallbackCtx(WOLFSSL* ssl,
|
||||
void* user_ctx);
|
||||
#endif /* HAVE_PK_CALLBACKS */
|
||||
|
||||
#ifdef WOLF_CRYPTO_CB
|
||||
/* devId for selecting the VaultIC via the crypto callback ("VLTC") */
|
||||
#define WOLF_VAULTIC_DEVID 0x564C5443
|
||||
|
||||
WOLFSSL_API int WOLFSSL_VAULTIC_CryptoCb(int devId, wc_CryptoInfo* info,
|
||||
void* ctx);
|
||||
WOLFSSL_API int WOLFSSL_VAULTIC_RegisterCryptoCb(int devId);
|
||||
#endif /* WOLF_CRYPTO_CB */
|
||||
|
||||
#ifdef __cplusplus
|
||||
} /* extern "C" */
|
||||
|
|
|
|||
Loading…
Reference in New Issue