Add support for TBBR using ECDSA keys in ARM platforms

    - fixed compile error when KEY_ALG=ecdsa
    - add new option ecdsa for TF_MBEDTLS_KEY_ALG
    - add new option devel_ecdsa for ARM_ROTPK_LOCATION
    - add ecdsa key at plat/arm/board/common/rotpk/
    - reduce the mbedtls heap memory size to 13k

Change-Id: I3f7a6170af93fdbaaa7bf2fffb4680a9f6113c13
Signed-off-by: Qixiang Xu <qixiang.xu@arm.com>

6 files changed, 22 insertions, 6 deletions

diff --git a/plat/arm/board/common/board_arm_trusted_boot.c b/plat/arm/board/common/board_arm_trusted_boot.c
index 5d36d178..6c03c91b 100644
--- a/plat/arm/board/common/board_arm_trusted_boot.c
+++ b/plat/arm/board/common/board_arm_trusted_boot.c
@@ -18,6 +18,7 @@
 /* ROTPK locations */
 #define ARM_ROTPK_REGS_ID		1
 #define ARM_ROTPK_DEVEL_RSA_ID		2
+#define ARM_ROTPK_DEVEL_ECDSA_ID	3
 
 static const unsigned char rotpk_hash_hdr[] =		\
 		"\x30\x31\x30\x0D\x06\x09\x60\x86\x48"	\
@@ -41,6 +42,12 @@ static const unsigned char arm_devel_rotpk_hash[] =	\
 		"\x37\x7A\x72\x47\x1B\xEC\x32\x73"	\
 		"\xE9\x92\x32\xE2\x49\x59\xF6\x5E"	\
 		"\x8B\x4A\x4A\x46\xD8\x22\x9A\xDA";
+#elif (ARM_ROTPK_LOCATION_ID == ARM_ROTPK_DEVEL_ECDSA_ID)
+static const unsigned char arm_devel_rotpk_hash[] =	\
+		"\x2E\x40\xBF\x6E\xF9\x12\xBB\x98"	\
+		"\x31\x71\x09\x0E\x1E\x15\x3D\x0B"	\
+		"\xFD\xD1\xCC\x69\x4A\x98\xEB\x8B"	\
+		"\xA0\xB0\x20\x86\x4E\x6C\x07\x17";
 #endif
 
 /*
@@ -69,7 +76,8 @@ int plat_get_rotpk_info(void *cookie, void **key_ptr, unsigned int *key_len,
 	memcpy(rotpk_hash_der, rotpk_hash_hdr, rotpk_hash_hdr_len);
 	dst = (uint8_t *)&rotpk_hash_der[rotpk_hash_hdr_len];
 
-#if (ARM_ROTPK_LOCATION_ID == ARM_ROTPK_DEVEL_RSA_ID)
+#if (ARM_ROTPK_LOCATION_ID == ARM_ROTPK_DEVEL_RSA_ID) \
+	|| (ARM_ROTPK_LOCATION_ID == ARM_ROTPK_DEVEL_ECDSA_ID)
 	memcpy(dst, arm_devel_rotpk_hash, SHA256_BYTES);
 #elif (ARM_ROTPK_LOCATION_ID == ARM_ROTPK_REGS_ID)
 	uint32_t *src, tmp;
@@ -121,7 +129,8 @@ int plat_get_rotpk_info(void *cookie, void **key_ptr, unsigned int *key_len,
 		*dst++ = (uint8_t)((tmp >> 8) & 0xFF);
 		*dst++ = (uint8_t)(tmp & 0xFF);
 	}
-#endif /* (ARM_ROTPK_LOCATION_ID == ARM_ROTPK_DEVEL_RSA_ID) */
+#endif /* (ARM_ROTPK_LOCATION_ID == ARM_ROTPK_DEVEL_RSA_ID) \
+		  || (ARM_ROTPK_LOCATION_ID == ARM_ROTPK_DEVEL_ECDSA_ID) */
 
 	*key_ptr = (void *)rotpk_hash_der;
 	*key_len = (unsigned int)sizeof(rotpk_hash_der);
diff --git a/plat/arm/board/common/board_common.mk b/plat/arm/board/common/board_common.mk
index 46672982..643047ce 100644
--- a/plat/arm/board/common/board_common.mk
+++ b/plat/arm/board/common/board_common.mk
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved.
+# Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -22,7 +22,11 @@ ifneq (${TRUSTED_BOARD_BOOT},0)
     ifeq (${ARM_ROTPK_LOCATION}, regs)
         ARM_ROTPK_LOCATION_ID = ARM_ROTPK_REGS_ID
     else ifeq (${ARM_ROTPK_LOCATION}, devel_rsa)
+        KEY_ALG := rsa
         ARM_ROTPK_LOCATION_ID = ARM_ROTPK_DEVEL_RSA_ID
+    else ifeq (${ARM_ROTPK_LOCATION}, devel_ecdsa)
+        KEY_ALG := ecdsa
+        ARM_ROTPK_LOCATION_ID = ARM_ROTPK_DEVEL_ECDSA_ID
     else
         $(error "Unsupported ARM_ROTPK_LOCATION value")
     endif
diff --git a/plat/arm/board/common/rotpk/arm_rotpk_ecdsa.der b/plat/arm/board/common/rotpk/arm_rotpk_ecdsa.der
new file mode 100644
index 00000000..25478772
--- /dev/null
+++ b/plat/arm/board/common/rotpk/arm_rotpk_ecdsa.der
diff --git a/plat/arm/board/common/rotpk/arm_rotpk_ecdsa_sha256.bin b/plat/arm/board/common/rotpk/arm_rotpk_ecdsa_sha256.bin
new file mode 100644
index 00000000..c5e123ab
--- /dev/null
+++ b/plat/arm/board/common/rotpk/arm_rotpk_ecdsa_sha256.bin
@@ -0,0 +1 @@
+.@¿nù»˜1q	=ýÑÌiJ˜ë‹ ° †Nl
\ No newline at end of file
diff --git a/plat/arm/board/common/rotpk/arm_rotprivk_ecdsa.pem b/plat/arm/board/common/rotpk/arm_rotprivk_ecdsa.pem
new file mode 100644
index 00000000..fb328e3c
--- /dev/null
+++ b/plat/arm/board/common/rotpk/arm_rotprivk_ecdsa.pem
@@ -0,0 +1,5 @@
+-----BEGIN EC PRIVATE KEY-----
+MHcCAQEEINSaX6nvzS3teiBJA7WlTLRKJOajpy29o2cArLbUXoZBoAoGCCqGSM49
+AwEHoUQDQgAEm+ZIvTQ44aKk83DhVLsvsFpKDP/Ch9vA+4Hp+fmVfX6gDH8K1OBi
+SpRf7FJ9RGPIn2H6xst+a1OtLMWUDRqGkQ==
+-----END EC PRIVATE KEY-----
diff --git a/plat/arm/board/juno/platform.mk b/plat/arm/board/juno/platform.mk
index 79916cda..5cd125bf 100644
--- a/plat/arm/board/juno/platform.mk
+++ b/plat/arm/board/juno/platform.mk
@@ -91,6 +91,3 @@ include plat/arm/common/arm_common.mk
 include plat/arm/soc/common/soc_css.mk
 include plat/arm/css/common/css_common.mk
 
-ifeq (${KEY_ALG},ecdsa)
-    $(error "ECDSA key algorithm is not fully supported on Juno.")
-endif