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crypto: ecdsa - Fix the public key format description

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Public key blob is not just x and y concatenated. It follows RFC5480
section 2.2. Address this by re-documenting the function with the
correct description of the format.

Link: https://datatracker.ietf.org/doc/html/rfc5480
Fixes: 4e6602916bc6 ("crypto: ecdsa - Add support for ECDSA signature verification")
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Jarkko Sakkinen 2024-05-27 23:28:39 +03:00 committed by Herbert Xu
parent 14cba6ace7
commit d7c897a9d8
1 changed files with 2 additions and 3 deletions
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5
crypto/ecdsa.c
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@ -215,9 +215,8 @@ static int ecdsa_ecc_ctx_reset(struct ecc_ctx *ctx)
}
/*
* Set the public key given the raw uncompressed key data from an X509
* certificate. The key data contain the concatenated X and Y coordinates of
* the public key.
* Set the public ECC key as defined by RFC5480 section 2.2 "Subject Public
* Key". Only the uncompressed format is supported.
*/
static int ecdsa_set_pub_key(struct crypto_akcipher *tfm, const void *key, unsigned int keylen)
{