Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
arch/arm/mach-imx/Kconfig | 7 +++
scripts/imx/Makefile | 4 ++
scripts/imx/imx-image.c | 130 ++++++++++++++++++++++++++++++++++++++++++++++
scripts/imx/imx.h | 1 +
4 files changed, 142 insertions(+)
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index c5ac90f..c631c33 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -66,6 +66,12 @@ config ARCH_IMX_IMXIMAGE
help
if enabled the imx-image tool is compiled
+config ARCH_IMX_IMXIMAGE_SSL_SUPPORT
+ bool
+ help
+ This enables SSL support for the imx-image tool. This is required
+ for created images for HABv3. This adds openssl to the build dependencies
+
config ARCH_IMX_XLOAD
bool
depends on ARCH_IMX51
@@ -742,6 +748,7 @@ endif
config HABV3
tristate "HABv3 support"
select HAB
+ select ARCH_IMX_IMXIMAGE_SSL_SUPPORT
depends on ARCH_IMX25
help
High Assurance Boot, as found on i.MX25.
diff --git a/scripts/imx/Makefile b/scripts/imx/Makefile
index 6883659..d9f0c51 100644
--- a/scripts/imx/Makefile
+++ b/scripts/imx/Makefile
@@ -7,6 +7,10 @@ HOSTCFLAGS_imx-usb-loader.o = `pkg-config --cflags libusb-1.0`
HOSTLOADLIBES_imx-usb-loader = `pkg-config --libs libusb-1.0`
HOSTCFLAGS_imx-image.o = -I$(srctree)
+ifdef CONFIG_ARCH_IMX_IMXIMAGE_SSL_SUPPORT
+HOSTCFLAGS_imx-image.o += -DIMXIMAGE_SSL_SUPPORT
+HOSTLOADLIBES_imx-image = `pkg-config --libs openssl`
+endif
imx-usb-loader-objs := imx-usb-loader.o imx.o
imx-image-objs := imx-image.o imx.o
diff --git a/scripts/imx/imx-image.c b/scripts/imx/imx-image.c
index d804ab4..b627b8c 100644
--- a/scripts/imx/imx-image.c
+++ b/scripts/imx/imx-image.c
@@ -72,6 +72,130 @@ static uint32_t bb_header[] = {
0x55555555,
};
+struct hab_rsa_public_key {
+ uint8_t rsa_exponent[4]; /* RSA public exponent */
+ uint32_t rsa_modulus; /* RSA modulus pointer */
+ uint16_t exponent_size; /* Exponent size in bytes */
+ uint16_t modulus_size; /* Modulus size in bytes*/
+ uint8_t init_flag; /* Indicates if key initialized */
+};
+
+#ifdef IMXIMAGE_SSL_SUPPORT
+#define PUBKEY_ALGO_LEN 2048
+
+#include <openssl/x509v3.h>
+#include <openssl/bn.h>
+#include <openssl/asn1.h>
+#include <openssl/x509.h>
+#include <openssl/x509_vfy.h>
+#include <openssl/pem.h>
+#include <openssl/bio.h>
+
+static int extract_key(const char *certfile, uint8_t **modulus, int *modulus_len,
+ uint8_t **exponent, int *exponent_len)
+{
+ char buf[PUBKEY_ALGO_LEN];
+ int pubkey_algonid;
+ const char *sslbuf;
+ EVP_PKEY *pkey;
+ FILE *fp;
+ X509 *cert;
+ RSA *rsa_key;
+
+ fp = fopen(certfile, "r");
+ if (!fp) {
+ fprintf(stderr, "unable to open certfile: %s\n", certfile);
+ return -errno;
+ }
+
+ cert = PEM_read_X509(fp, NULL, NULL, NULL);
+ if (!cert) {
+ fprintf(stderr, "unable to parse certificate in: %s\n", certfile);
+ fclose(fp);
+ return -errno;
+ }
+
+ fclose(fp);
+
+ pubkey_algonid = OBJ_obj2nid(cert->cert_info->key->algor->algorithm);
+ if (pubkey_algonid == NID_undef) {
+ fprintf(stderr, "unable to find specified public key algorithm name.\n");
+ return -EINVAL;
+ }
+
+ if (pubkey_algonid != NID_rsaEncryption)
+ return -EINVAL;
+
+ sslbuf = OBJ_nid2ln(pubkey_algonid);
+ strncpy(buf, sslbuf, PUBKEY_ALGO_LEN);
+
+ pkey = X509_get_pubkey(cert);
+ if (!pkey) {
+ fprintf(stderr, "unable to extract public key from certificate");
+ return -EINVAL;
+ }
+
+ rsa_key = pkey->pkey.rsa;
+ if (!rsa_key) {
+ fprintf(stderr, "unable to extract RSA public key");
+ return -EINVAL;
+ }
+
+ *modulus_len = BN_num_bytes(rsa_key->n);
+ *modulus = malloc(*modulus_len);
+ BN_bn2bin(rsa_key->n, *modulus);
+
+ *exponent_len = BN_num_bytes(rsa_key->e);
+ *exponent = malloc(*exponent_len);
+ BN_bn2bin(rsa_key->e, *exponent);
+
+ EVP_PKEY_free(pkey);
+ X509_free(cert);
+
+ return 0;
+}
+
+static int add_srk(void *buf, int offset, uint32_t loadaddr, const char *srkfile)
+{
+ struct imx_flash_header *hdr = buf + offset;
+ struct hab_rsa_public_key *key = buf + 0xc00;
+ uint8_t *exponent = NULL, *modulus = NULL, *modulus_dest;
+ int exponent_len = 0, modulus_len = 0;
+ int ret;
+
+ hdr->super_root_key = loadaddr + 0xc00;
+
+ key->init_flag = 1;
+ key->exponent_size = htole16(3);
+
+ ret = extract_key(srkfile, &modulus, &modulus_len, &exponent, &exponent_len);
+ if (ret)
+ return ret;
+
+ modulus_dest = (void *)(key + 1);
+
+ memcpy(modulus_dest, modulus, modulus_len);
+
+ key->modulus_size = htole16(modulus_len);
+ key->rsa_modulus = htole32(hdr->super_root_key + sizeof(*key));
+
+ if (exponent_len > 4)
+ return -EINVAL;
+
+ key->exponent_size = exponent_len;
+ memcpy(&key->rsa_exponent, exponent, key->exponent_size);
+
+ return 0;
+}
+#else
+static int add_srk(void *buf, int offset, uint32_t loadaddr, const char *srkfile)
+{
+ fprintf(stderr, "This version of imx-image is compiled without SSL support\n");
+
+ return -EINVAL;
+}
+#endif /* IMXIMAGE_SSL_SUPPORT */
+
static int add_header_v1(struct config_data *data, void *buf)
{
struct imx_flash_header *hdr;
@@ -430,6 +554,12 @@ int main(int argc, char *argv[])
switch (data.header_version) {
case 1:
add_header_v1(&data, buf);
+ if (data.srkfile) {
+ ret = add_srk(buf, data.image_dcd_offset, data.image_load_addr,
+ data.srkfile);
+ if (ret)
+ exit(1);
+ }
break;
case 2:
add_header_v2(&data, buf);
diff --git a/scripts/imx/imx.h b/scripts/imx/imx.h
index 6e2f43b..bc7d4ee 100644
--- a/scripts/imx/imx.h
+++ b/scripts/imx/imx.h
@@ -57,6 +57,7 @@ struct config_data {
uint32_t image_size;
uint32_t load_size;
char *outfile;
+ char *srkfile;
int header_version;
int cpu_type;
int (*check)(struct config_data *data, uint32_t cmd, uint32_t addr, uint32_t mask);
--
2.7.0.rc3
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