[PATCH 7/7] command: add hmac sum supportfor md5, sha1, sha224, sha256, sha384, sha512

[Sascha Hauer]

On Tue, Mar 10, 2015 at 03:28:17PM +0100, Jean-Christophe PLAGNIOL-VILLARD wrote:
> pass the key via -k param
> 
> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
> ---
>  commands/digest.c | 26 ++++++++++++++++++++++----
>  common/digest.c   | 22 +++++++++++++++++-----
>  include/digest.h  |  3 +++
>  3 files changed, 42 insertions(+), 9 deletions(-)
> 
> diff --git a/commands/digest.c b/commands/digest.c
> index 20fa13f..713f5c6 100644
> --- a/commands/digest.c
> +++ b/commands/digest.c
> @@ -25,6 +25,7 @@
>  #include <xfuncs.h>
>  #include <malloc.h>
>  #include <digest.h>
> +#include <getopt.h>
>  
>  static int do_digest(char *algorithm, int argc, char *argv[])
>  {
> @@ -32,11 +33,26 @@ static int do_digest(char *algorithm, int argc, char *argv[])
>  	int ret = 0;
>  	int i;
>  	unsigned char *hash;
> +	unsigned char *key = NULL;
> +	size_t keylen = 0;
> +	int opt;
> +
> +	while((opt = getopt(argc, argv, "k:")) > 0) {
> +		switch(opt) {
> +		case 'k':
> +			key = optarg;
> +			keylen = strlen(key);
> +			break;
> +		}

This passes the key directly as string to the digest operations. This
means we are limited to ASCII printable strings here. I'm not very
familiar with ways for passing keys, but shouldn't we allow to pass the
key as hex numbers or similar?

Sascha

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