This extends the keytoc utility to also handle ecdsa keys. Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> --- scripts/keytoc.c | 130 ++++++++++++++++++++++++++++++++++++----------- 1 file changed, 99 insertions(+), 31 deletions(-) diff --git a/scripts/keytoc.c b/scripts/keytoc.c index be50ec86b9..b8ad386f9b 100644 --- a/scripts/keytoc.c +++ b/scripts/keytoc.c @@ -339,44 +339,70 @@ static int print_bignum(BIGNUM *num, int num_bits) return 0; } -static int gen_key(const char *keyname, const char *path) +static int gen_key_ecdsa(EVP_PKEY *key, const char *key_name, const char *key_name_c) { - BIGNUM *modulus, *r_squared; - uint64_t exponent = 0; - uint32_t n0_inv; - int ret; - int bits; - EVP_PKEY *key; - char *tmp, *key_name_c; + char group[128]; + size_t outlen; + int ret, bits; + BIGNUM *key_x = NULL, *key_y = NULL; - tmp = key_name_c = strdup(keyname); + ret = EVP_PKEY_get_int_param(key, "bits", &bits); + if (!ret) + return -EINVAL; - while (*tmp) { - if (*tmp == '-') - *tmp = '_'; - tmp++; - } + ret = EVP_PKEY_get_utf8_string_param(key, "group", group, sizeof(group), &outlen); + if (!ret) + return -EINVAL; - if (!strncmp(path, "__ENV__", 7)) { - const char *var = getenv(path + 7); - if (!var) { - fprintf(stderr, - "environment variable \"%s\" is empty\n", path + 7); - exit(1); - } - path = var; - } + ret = EVP_PKEY_get_bn_param(key, OSSL_PKEY_PARAM_EC_PUB_X, &key_x); + if (!ret) + return -EINVAL; - if (!strncmp(path, "pkcs11:", 7)) { - ret = rsa_engine_get_pub_key(path, "pkcs11", &key); - if (ret) - exit(1); + ret = EVP_PKEY_get_bn_param(key, OSSL_PKEY_PARAM_EC_PUB_Y, &key_y); + if (!ret) + return -EINVAL; + + if (dts) { + fprintf(outfilep, "\t\tkey-%s {\n", key_name_c); + fprintf(outfilep, "\t\t\tecdsa,x-point = <"); + print_bignum(key_x, bits); + fprintf(outfilep, ">;\n"); + fprintf(outfilep, "\t\t\tecdsa,y-point = <"); + print_bignum(key_y, bits); + fprintf(outfilep, ">;\n"); + fprintf(outfilep, "\t\t\tecdsa,curve = \"%s\";\n", group); + fprintf(outfilep, "\t\t};\n"); } else { - ret = rsa_pem_get_pub_key(path, &key); - if (ret) - exit(1); + fprintf(outfilep, "\nstatic uint32_t %s_x[] = {", key_name_c); + print_bignum(key_x, bits); + fprintf(outfilep, "\n};\n\n"); + + fprintf(outfilep, "static uint32_t %s_y[] = {", key_name_c); + print_bignum(key_y, bits); + fprintf(outfilep, "\n};\n\n"); + + fprintf(outfilep, "static struct ecdsa_public_key %s = {\n", key_name_c); + + fprintf(outfilep, "\t.curve_name = \"%s\",\n", group); + fprintf(outfilep, "\t.x = %s_x,\n", key_name_c); + fprintf(outfilep, "\t.y = %s_y,\n", key_name_c); + fprintf(outfilep, "};\n"); + if (!standalone) + fprintf(outfilep, "\nstruct ecdsa_public_key *%s_ecdsa_p __attribute__((section(\".ecdsa_keys.rodata.%s\"))) = &%s;\n", + key_name_c, key_name_c, key_name_c); } + return 0; +} + +static int gen_key_rsa(EVP_PKEY *key, const char *key_name, const char *key_name_c) +{ + BIGNUM *modulus, *r_squared; + uint64_t exponent = 0; + uint32_t n0_inv; + int bits; + int ret; + ret = rsa_get_params(key, &exponent, &n0_inv, &modulus, &r_squared); if (ret) return ret; @@ -419,7 +445,7 @@ static int gen_key(const char *keyname, const char *path) fprintf(outfilep, "\t.modulus = %s_modulus,\n", key_name_c); fprintf(outfilep, "\t.rr = %s_rr,\n", key_name_c); fprintf(outfilep, "\t.exponent = 0x%0lx,\n", exponent); - fprintf(outfilep, "\t.key_name_hint = \"%s\",\n", keyname); + fprintf(outfilep, "\t.key_name_hint = \"%s\",\n", key_name); fprintf(outfilep, "};\n"); if (!standalone) @@ -430,6 +456,47 @@ static int gen_key(const char *keyname, const char *path) return 0; } +static int gen_key(const char *keyname, const char *path) +{ + int ret; + EVP_PKEY *key; + char *tmp, *key_name_c; + + tmp = key_name_c = strdup(keyname); + + while (*tmp) { + if (*tmp == '-') + *tmp = '_'; + tmp++; + } + + if (!strncmp(path, "__ENV__", 7)) { + const char *var = getenv(path + 7); + if (!var) { + fprintf(stderr, + "environment variable \"%s\" is empty\n", path + 7); + exit(1); + } + path = var; + } + + if (!strncmp(path, "pkcs11:", 7)) { + ret = rsa_engine_get_pub_key(path, "pkcs11", &key); + if (ret) + exit(1); + } else { + ret = rsa_pem_get_pub_key(path, &key); + if (ret) + exit(1); + } + + ret = gen_key_ecdsa(key, keyname, key_name_c); + if (ret) + ret = gen_key_rsa(key, keyname, key_name_c); + + return 0; +} + int main(int argc, char *argv[]) { char *path, *keyname; @@ -477,6 +544,7 @@ int main(int argc, char *argv[]) else fprintf(outfilep, "\tsignature {\n"); } else if (standalone) { + fprintf(outfilep, "#include <ecdsa.h>\n"); fprintf(outfilep, "#include <rsa.h>\n"); } -- 2.39.2