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* hash: Use lower case for hash algorithm namesSimon Glass2013-02-28-0/+4
| | | | | | | | | | Rather than use strcasecmp() in the hash algorithm search, require the caller to do this first. Most of U-Boot can use lower case anyway, and the hash command can convert to lower case before calling hash_command(). This saves needing strcasecmp() for boards that use hashing but not the hash command. Signed-off-by: Simon Glass <sjg@chromium.org>
* hash: Add a flag to support saving hashes in the environmentSimon Glass2013-02-28-4/+4
| | | | | | | | | Some hashing commands permit saving the hash in an environment variable, and verifying a hash from there. But the crc32 command does not support this. In order to permit crc32 to use the generic hashing infrastructure, add a flag to select which behaviour to use. Signed-off-by: Simon Glass <sjg@chromium.org>
* Tidy up error checking and fix bug in hash commandSimon Glass2013-02-28-0/+4
| | | | | | | | | There are two problems: 1. The argument count needs to be checked before argv is used 2. When verify is not enabled, we need to define a constant zero value Signed-off-by: Simon Glass <sjg@chromium.org>
* Add hash command to perform hashing using various algorithmsSimon Glass2012-12-11-0/+63
This new command supports hashing SHA1 and SHA256. It could be extended to others such as MD5 and the CRC algorithms. The syntax is modeled on those: hash <algorithm> <address> <length> [*<dest_addr> | <dest_envvar>] to calculate a hash, and: hash -v <algorithm> <address> <length> [*<verify_addr> | <verify_envvar>] to verify a hash. Use CONFIG_CMD_HASH to enable the command, CONFIG_SHA1 to enable SHA1 and CONFIG_SHA256 to enable SHA256. The existing sha1sum command remains. Signed-off-by: Simon Glass <sjg@chromium.org>