To support cryptographic communication with the TPM, we need to add Cipher FeedBack (CFB) mode for stream encryption because this is the mandated encryption scheme for all encrypted parameters and responses. Additionally, we ran across a problem in the elliptic curve routines in that the size of the scatterlist is hard coded to 1 which causes a kernel BUG if you use a longer scatterlist. Since all the current kernel consumers use a single element scatterlist, this bug won't manifest until we add the TPM routines to use crypto, so I didn't mark it for stable. James Bottomley (2): crypto: cfb: add support for Cipher FeedBack mode crypto: ecdh: fix to allow multi segment scatterlists crypto/Kconfig | 8 ++ crypto/Makefile | 1 + crypto/cfb.c | 353 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ crypto/ecdh.c | 23 +++- 4 files changed, 379 insertions(+), 6 deletions(-) create mode 100644 crypto/cfb.c -- 2.12.3
