DPE: Add Certify Key command

Create a leaf certificate and return the certificate chain.

Signed-off-by: Maulik Patel <maulik.patel@arm.com>
Change-Id: Ib82312af7b653df5c46bc5c11e93d7ff53ad1894
diff --git a/partitions/dice_protection_environment/dpe_log.c b/partitions/dice_protection_environment/dpe_log.c
index 05ee08c..d81674c 100644
--- a/partitions/dice_protection_environment/dpe_log.c
+++ b/partitions/dice_protection_environment/dpe_log.c
@@ -109,4 +109,12 @@
     print_byte_array(cert_buf, cert_buf_size);
 }
 
+void log_certificate_chain(const uint8_t *certificate_chain_buf,
+                           size_t certificate_chain_size)
+{
+    LOG_DBGFMT("DPE Certificate Chain:\r\n");
+    LOG_DBGFMT(" - size = %d\r\n", certificate_chain_size);
+    print_byte_array(certificate_chain_buf, certificate_chain_size);
+}
+
 #endif /* TFM_PARTITION_LOG_LEVEL */