Utility to output digests in format suitable for RSA signatures.

Utility to output digests in format suitable for RSA signatures. 

The current stable version of OpenSSL(0.9.8d) does not support RSA signature with SHA-256 and SHA-512 message digests. This utility outputs the hash of file data in a format suitable for use with the "openssl" command-line tool fir generating RSA signatures.

Also modified the tests to use this to generate RSA signature rather than "openssl pkeyutl" which is not supported on current stable version of OpenSSL.

[Chris Masone, 2010-01-29 03:33:15]

lgtm, with nits

http://codereview.chromium.org/552227/diff/1001/2006
File src/platform/vboot_reference/tests/signature_digest.c (right):

http://codereview.chromium.org/552227/diff/1001/2006#newcode26
src/platform/vboot_reference/tests/signature_digest.c:26: int digestinfo_size =
digestinfo_size_map[algorithm];
why arent the above const as well?

http://codereview.chromium.org/552227/diff/1001/2006#newcode36
src/platform/vboot_reference/tests/signature_digest.c:36: uint8_t *digest =
NULL, *signature = NULL;
do these on separate lines.  Also...I used to do this too, but sometimes you put
the * next to the var name, and sometimes next to the type.  Can you pick one
and stick with it?

[gauravsh, 2010-01-29 03:43:01]

http://codereview.chromium.org/552227/diff/1001/2006
File src/platform/vboot_reference/tests/signature_digest.c (right):

http://codereview.chromium.org/552227/diff/1001/2006#newcode26
src/platform/vboot_reference/tests/signature_digest.c:26: int digestinfo_size =
digestinfo_size_map[algorithm];
On 2010/01/29 03:33:15, cmasone wrote:
> why arent the above const as well?

Done.

http://codereview.chromium.org/552227/diff/1001/2006#newcode36
src/platform/vboot_reference/tests/signature_digest.c:36: uint8_t *digest =
NULL, *signature = NULL;
On 2010/01/29 03:33:15, cmasone wrote:
> do these on separate lines.  Also...I used to do this too, but sometimes you
put
> the * next to the var name, and sometimes next to the type.  Can you pick one
> and stick with it?

Yes, from now on I am sticking to the type name. Fixed.