diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/auth/tbbr/tbbr_cot.c | 445 |
1 files changed, 445 insertions, 0 deletions
diff --git a/drivers/auth/tbbr/tbbr_cot.c b/drivers/auth/tbbr/tbbr_cot.c new file mode 100644 index 00000000..79a89651 --- /dev/null +++ b/drivers/auth/tbbr/tbbr_cot.c @@ -0,0 +1,445 @@ +/* + * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * Neither the name of ARM nor the names of its contributors may be used + * to endorse or promote products derived from this software without specific + * prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <auth_mod.h> +#include <platform_def.h> +#include <platform_oid.h> +#include <stddef.h> + +/* + * Maximum key and hash sizes (in DER format) + */ +#define PK_DER_LEN 294 +#define HASH_DER_LEN 51 + +/* + * The platform must allocate buffers to store the authentication parameters + * extracted from the certificates. In this case, because of the way the CoT is + * established, we can reuse some of the buffers on different stages + */ +static unsigned char plat_bl2_hash_buf[HASH_DER_LEN]; +static unsigned char plat_bl30_hash_buf[HASH_DER_LEN]; +static unsigned char plat_bl31_hash_buf[HASH_DER_LEN]; +static unsigned char plat_bl32_hash_buf[HASH_DER_LEN]; +static unsigned char plat_bl33_hash_buf[HASH_DER_LEN]; +static unsigned char plat_tz_world_pk_buf[PK_DER_LEN]; +static unsigned char plat_ntz_world_pk_buf[PK_DER_LEN]; +static unsigned char plat_content_pk[PK_DER_LEN]; + +/* + * Parameter type descriptors + */ +static auth_param_type_desc_t subject_pk = AUTH_PARAM_TYPE_DESC( + AUTH_PARAM_PUB_KEY, 0); +static auth_param_type_desc_t sig = AUTH_PARAM_TYPE_DESC( + AUTH_PARAM_SIG, 0); +static auth_param_type_desc_t sig_alg = AUTH_PARAM_TYPE_DESC( + AUTH_PARAM_SIG_ALG, 0); +static auth_param_type_desc_t raw_data = AUTH_PARAM_TYPE_DESC( + AUTH_PARAM_RAW_DATA, 0); + +static auth_param_type_desc_t tz_world_pk = AUTH_PARAM_TYPE_DESC( + AUTH_PARAM_PUB_KEY, TZ_WORLD_PK_OID); +static auth_param_type_desc_t ntz_world_pk = AUTH_PARAM_TYPE_DESC( + AUTH_PARAM_PUB_KEY, NTZ_WORLD_PK_OID); + +static auth_param_type_desc_t bl30_content_pk = AUTH_PARAM_TYPE_DESC( + AUTH_PARAM_PUB_KEY, BL30_CONTENT_CERT_PK_OID); +static auth_param_type_desc_t bl31_content_pk = AUTH_PARAM_TYPE_DESC( + AUTH_PARAM_PUB_KEY, BL31_CONTENT_CERT_PK_OID); +static auth_param_type_desc_t bl32_content_pk = AUTH_PARAM_TYPE_DESC( + AUTH_PARAM_PUB_KEY, BL32_CONTENT_CERT_PK_OID); +static auth_param_type_desc_t bl33_content_pk = AUTH_PARAM_TYPE_DESC( + AUTH_PARAM_PUB_KEY, BL33_CONTENT_CERT_PK_OID); + +static auth_param_type_desc_t bl2_hash = AUTH_PARAM_TYPE_DESC( + AUTH_PARAM_HASH, BL2_HASH_OID); +static auth_param_type_desc_t bl30_hash = AUTH_PARAM_TYPE_DESC( + AUTH_PARAM_HASH, BL30_HASH_OID); +static auth_param_type_desc_t bl31_hash = AUTH_PARAM_TYPE_DESC( + AUTH_PARAM_HASH, BL31_HASH_OID); +static auth_param_type_desc_t bl32_hash = AUTH_PARAM_TYPE_DESC( + AUTH_PARAM_HASH, BL32_HASH_OID); +static auth_param_type_desc_t bl33_hash = AUTH_PARAM_TYPE_DESC( + AUTH_PARAM_HASH, BL33_HASH_OID); + +/* + * TBBR Chain of trust definition + */ +static const auth_img_desc_t cot_desc[] = { + /* + * BL2 + */ + [BL2_CERT_ID] = { + .img_id = BL2_CERT_ID, + .img_type = IMG_CERT, + .parent = NULL, + .img_auth_methods = { + [0] = { + .type = AUTH_METHOD_SIG, + .param.sig = { + .pk = &subject_pk, + .sig = &sig, + .alg = &sig_alg, + .data = &raw_data, + } + } + }, + .authenticated_data = { + [0] = { + .type_desc = &bl2_hash, + .data = { + .ptr = (void *)plat_bl2_hash_buf, + .len = (unsigned int)HASH_DER_LEN + } + } + } + }, + [BL2_IMAGE_ID] = { + .img_id = BL2_IMAGE_ID, + .img_type = IMG_RAW, + .parent = &cot_desc[BL2_CERT_ID], + .img_auth_methods = { + [0] = { + .type = AUTH_METHOD_HASH, + .param.hash = { + .data = &raw_data, + .hash = &bl2_hash, + } + } + } + }, + /* + * Trusted key certificate + */ + [TRUSTED_KEY_CERT_ID] = { + .img_id = TRUSTED_KEY_CERT_ID, + .img_type = IMG_CERT, + .parent = NULL, + .img_auth_methods = { + [0] = { + .type = AUTH_METHOD_SIG, + .param.sig = { + .pk = &subject_pk, + .sig = &sig, + .alg = &sig_alg, + .data = &raw_data, + } + } + }, + .authenticated_data = { + [0] = { + .type_desc = &tz_world_pk, + .data = { + .ptr = (void *)plat_tz_world_pk_buf, + .len = (unsigned int)PK_DER_LEN + } + }, + [1] = { + .type_desc = &ntz_world_pk, + .data = { + .ptr = (void *)plat_ntz_world_pk_buf, + .len = (unsigned int)PK_DER_LEN + } + } + } + }, + /* + * BL3-0 + */ + [BL30_KEY_CERT_ID] = { + .img_id = BL30_KEY_CERT_ID, + .img_type = IMG_CERT, + .parent = &cot_desc[TRUSTED_KEY_CERT_ID], + .img_auth_methods = { + [0] = { + .type = AUTH_METHOD_SIG, + .param.sig = { + .pk = &tz_world_pk, + .sig = &sig, + .alg = &sig_alg, + .data = &raw_data, + } + } + }, + .authenticated_data = { + [0] = { + .type_desc = &bl30_content_pk, + .data = { + .ptr = (void *)plat_content_pk, + .len = (unsigned int)PK_DER_LEN + } + } + } + }, + [BL30_CERT_ID] = { + .img_id = BL30_CERT_ID, + .img_type = IMG_CERT, + .parent = &cot_desc[BL30_KEY_CERT_ID], + .img_auth_methods = { + [0] = { + .type = AUTH_METHOD_SIG, + .param.sig = { + .pk = &bl30_content_pk, + .sig = &sig, + .alg = &sig_alg, + .data = &raw_data, + } + } + }, + .authenticated_data = { + [0] = { + .type_desc = &bl30_hash, + .data = { + .ptr = (void *)plat_bl30_hash_buf, + .len = (unsigned int)HASH_DER_LEN + } + } + } + }, + [BL30_IMAGE_ID] = { + .img_id = BL30_IMAGE_ID, + .img_type = IMG_RAW, + .parent = &cot_desc[BL30_CERT_ID], + .img_auth_methods = { + [0] = { + .type = AUTH_METHOD_HASH, + .param.hash = { + .data = &raw_data, + .hash = &bl30_hash, + } + } + } + }, + /* + * BL3-1 + */ + [BL31_KEY_CERT_ID] = { + .img_id = BL31_KEY_CERT_ID, + .img_type = IMG_CERT, + .parent = &cot_desc[TRUSTED_KEY_CERT_ID], + .img_auth_methods = { + [0] = { + .type = AUTH_METHOD_SIG, + .param.sig = { + .pk = &tz_world_pk, + .sig = &sig, + .alg = &sig_alg, + .data = &raw_data, + } + } + }, + .authenticated_data = { + [0] = { + .type_desc = &bl31_content_pk, + .data = { + .ptr = (void *)plat_content_pk, + .len = (unsigned int)PK_DER_LEN + } + } + } + }, + [BL31_CERT_ID] = { + .img_id = BL31_CERT_ID, + .img_type = IMG_CERT, + .parent = &cot_desc[BL31_KEY_CERT_ID], + .img_auth_methods = { + [0] = { + .type = AUTH_METHOD_SIG, + .param.sig = { + .pk = &bl31_content_pk, + .sig = &sig, + .alg = &sig_alg, + .data = &raw_data, + } + } + }, + .authenticated_data = { + [0] = { + .type_desc = &bl31_hash, + .data = { + .ptr = (void *)plat_bl31_hash_buf, + .len = (unsigned int)HASH_DER_LEN + } + } + } + }, + [BL31_IMAGE_ID] = { + .img_id = BL31_IMAGE_ID, + .img_type = IMG_RAW, + .parent = &cot_desc[BL31_CERT_ID], + .img_auth_methods = { + [0] = { + .type = AUTH_METHOD_HASH, + .param.hash = { + .data = &raw_data, + .hash = &bl31_hash, + } + } + } + }, + /* + * BL3-2 + */ + [BL32_KEY_CERT_ID] = { + .img_id = BL32_KEY_CERT_ID, + .img_type = IMG_CERT, + .parent = &cot_desc[TRUSTED_KEY_CERT_ID], + .img_auth_methods = { + [0] = { + .type = AUTH_METHOD_SIG, + .param.sig = { + .pk = &tz_world_pk, + .sig = &sig, + .alg = &sig_alg, + .data = &raw_data, + } + } + }, + .authenticated_data = { + [0] = { + .type_desc = &bl32_content_pk, + .data = { + .ptr = (void *)plat_content_pk, + .len = (unsigned int)PK_DER_LEN + } + } + } + }, + [BL32_CERT_ID] = { + .img_id = BL32_CERT_ID, + .img_type = IMG_CERT, + .parent = &cot_desc[BL32_KEY_CERT_ID], + .img_auth_methods = { + [0] = { + .type = AUTH_METHOD_SIG, + .param.sig = { + .pk = &bl32_content_pk, + .sig = &sig, + .alg = &sig_alg, + .data = &raw_data, + } + } + }, + .authenticated_data = { + [0] = { + .type_desc = &bl32_hash, + .data = { + .ptr = (void *)plat_bl32_hash_buf, + .len = (unsigned int)HASH_DER_LEN + } + } + } + }, + [BL32_IMAGE_ID] = { + .img_id = BL32_IMAGE_ID, + .img_type = IMG_RAW, + .parent = &cot_desc[BL32_CERT_ID], + .img_auth_methods = { + [0] = { + .type = AUTH_METHOD_HASH, + .param.hash = { + .data = &raw_data, + .hash = &bl32_hash, + } + } + } + }, + /* + * BL3-3 + */ + [BL33_KEY_CERT_ID] = { + .img_id = BL33_KEY_CERT_ID, + .img_type = IMG_CERT, + .parent = &cot_desc[TRUSTED_KEY_CERT_ID], + .img_auth_methods = { + [0] = { + .type = AUTH_METHOD_SIG, + .param.sig = { + .pk = &ntz_world_pk, + .sig = &sig, + .alg = &sig_alg, + .data = &raw_data, + } + } + }, + .authenticated_data = { + [0] = { + .type_desc = &bl33_content_pk, + .data = { + .ptr = (void *)plat_content_pk, + .len = (unsigned int)PK_DER_LEN + } + } + } + }, + [BL33_CERT_ID] = { + .img_id = BL33_CERT_ID, + .img_type = IMG_CERT, + .parent = &cot_desc[BL33_KEY_CERT_ID], + .img_auth_methods = { + [0] = { + .type = AUTH_METHOD_SIG, + .param.sig = { + .pk = &bl33_content_pk, + .sig = &sig, + .alg = &sig_alg, + .data = &raw_data, + } + } + }, + .authenticated_data = { + [0] = { + .type_desc = &bl33_hash, + .data = { + .ptr = (void *)plat_bl33_hash_buf, + .len = (unsigned int)HASH_DER_LEN + } + } + } + }, + [BL33_IMAGE_ID] = { + .img_id = BL33_IMAGE_ID, + .img_type = IMG_RAW, + .parent = &cot_desc[BL33_CERT_ID], + .img_auth_methods = { + [0] = { + .type = AUTH_METHOD_HASH, + .param.hash = { + .data = &raw_data, + .hash = &bl33_hash, + } + } + } + } +}; + +/* Register the CoT in the authentication module */ +REGISTER_COT(cot_desc); |