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author | Jake Edge <jake@lwn.net> | 2014-05-19 17:48:24 -0600 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-05-19 17:32:27 -0700 |
commit | 85dfd522f885ee4ec0b0b4efa1fdd9c650e243be (patch) | |
tree | 611657b5a850d7d2f29eb8ce133387a14743ec11 /drivers/staging/skein/threefish_api.c | |
parent | 19440266b8876b5b6674162a43063192f12e3518 (diff) | |
download | linux-85dfd522f885ee4ec0b0b4efa1fdd9c650e243be.tar.gz linux-85dfd522f885ee4ec0b0b4efa1fdd9c650e243be.tar.xz |
staging/skein: rename files and clean up directory structure
Clean up file names and locations. Get rid of include/ directory and move
those up to the top-level. Rename files to get rid of upper case. Remove
skeinBlockNo3F.c as it was unused (temporary file or something?).
Signed-off-by: Jake Edge <jake@lwn.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/skein/threefish_api.c')
-rw-r--r-- | drivers/staging/skein/threefish_api.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/drivers/staging/skein/threefish_api.c b/drivers/staging/skein/threefish_api.c new file mode 100644 index 000000000000..2b649abb78c7 --- /dev/null +++ b/drivers/staging/skein/threefish_api.c @@ -0,0 +1,77 @@ +#include <linux/string.h> +#include "threefish_api.h" + +void threefish_set_key(struct threefish_key *key_ctx, + enum threefish_size state_size, + u64 *key_data, u64 *tweak) +{ + int key_words = state_size / 64; + int i; + u64 parity = KEY_SCHEDULE_CONST; + + key_ctx->tweak[0] = tweak[0]; + key_ctx->tweak[1] = tweak[1]; + key_ctx->tweak[2] = tweak[0] ^ tweak[1]; + + for (i = 0; i < key_words; i++) { + key_ctx->key[i] = key_data[i]; + parity ^= key_data[i]; + } + key_ctx->key[i] = parity; + key_ctx->state_size = state_size; +} + +void threefish_encrypt_block_bytes(struct threefish_key *key_ctx, u8 *in, + u8 *out) +{ + u64 plain[SKEIN_MAX_STATE_WORDS]; /* max number of words*/ + u64 cipher[SKEIN_MAX_STATE_WORDS]; + + skein_get64_lsb_first(plain, in, key_ctx->state_size / 64); + threefish_encrypt_block_words(key_ctx, plain, cipher); + skein_put64_lsb_first(out, cipher, key_ctx->state_size / 8); +} + +void threefish_encrypt_block_words(struct threefish_key *key_ctx, u64 *in, + u64 *out) +{ + switch (key_ctx->state_size) { + case THREEFISH_256: + threefish_encrypt_256(key_ctx, in, out); + break; + case THREEFISH_512: + threefish_encrypt_512(key_ctx, in, out); + break; + case THREEFISH_1024: + threefish_encrypt_1024(key_ctx, in, out); + break; + } +} + +void threefish_decrypt_block_bytes(struct threefish_key *key_ctx, u8 *in, + u8 *out) +{ + u64 plain[SKEIN_MAX_STATE_WORDS]; /* max number of words*/ + u64 cipher[SKEIN_MAX_STATE_WORDS]; + + skein_get64_lsb_first(cipher, in, key_ctx->state_size / 64); + threefish_decrypt_block_words(key_ctx, cipher, plain); + skein_put64_lsb_first(out, plain, key_ctx->state_size / 8); +} + +void threefish_decrypt_block_words(struct threefish_key *key_ctx, u64 *in, + u64 *out) +{ + switch (key_ctx->state_size) { + case THREEFISH_256: + threefish_decrypt_256(key_ctx, in, out); + break; + case THREEFISH_512: + threefish_decrypt_512(key_ctx, in, out); + break; + case THREEFISH_1024: + threefish_decrypt_1024(key_ctx, in, out); + break; + } +} + |