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author | Stefan Berger <stefanb@linux.ibm.com> | 2024-04-04 10:18:45 -0400 |
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committer | Herbert Xu <herbert@gondor.apana.org.au> | 2024-04-12 15:07:51 +0800 |
commit | d67c96fb97b5811e15c881d5cb72e293faa5f8e1 (patch) | |
tree | 4ad18dc03d5e111c8e8baf10d6d86347fa0235db /crypto/cts.c | |
parent | 526d23fc2dd03a749297f5ef5edcbfb8c492dcfd (diff) |
crypto: ecdsa - Convert byte arrays with key coordinates to digits
For NIST P192/256/384 the public key's x and y parameters could be copied
directly from a given array since both parameters filled 'ndigits' of
digits (a 'digit' is a u64). For support of NIST P521 the key parameters
need to have leading zeros prepended to the most significant digit since
only 2 bytes of the most significant digit are provided.
Therefore, implement ecc_digits_from_bytes to convert a byte array into an
array of digits and use this function in ecdsa_set_pub_key where an input
byte array needs to be converted into digits.
Suggested-by: Lukas Wunner <lukas@wunner.de>
Tested-by: Lukas Wunner <lukas@wunner.de>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/cts.c')
0 files changed, 0 insertions, 0 deletions