On 10/02/2015 02:56 PM, Jimmy Zhang wrote:
Add support to dump rsa pubkey, bct's rsa-pss signature and
bootloader's rsa-pss signature.
It also seems to dump some AES hashes too.
diff --git a/src/bct_dump.c b/src/bct_dump.c
+static void format_rsa_param(char const * message, void * data)
+{
+ u_int8_t *rsa = (u_int8_t *)data;
+ int byte_index;
+
+ printf("%s", message);
+ for (byte_index = 0; byte_index < ARSE_RSA_PARAM_MAX_BYTES;
+ ++byte_index) {
+ printf("%02x", *rsa++);
+
+ if (byte_index && ((byte_index + 1) % 64 == 0))
+ printf(";\n");
+ }
+
+ if (byte_index && (byte_index % 64 != 0))
+ printf(";\n");
+}
The same comment about hard-coding ARSE_RSA_PARAM_MAX_BYTES applies here
as in the previous commit.
It would be nice if this function wrote the values to a file. That way,
the output of bct_dump would be something you could feed into cbootimage
directly. With this patch, the user has to manually convert the inline
hex data into a binary file before the output is useful.
Still, solving that might be challenging. If bct_dump wrote to a
user-supplied filename, the files could simply be named
"${filename}.RsaKeyModulus" etc. However, since bct_dump prints to
stdout, that's not possible. Perhaps since bct_dump is mostly a debug
aid, we can live with this issue for now.
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