In some cases the name keylen does not reflect the purpose of the variable anymore once NIST P521 is used but it is the size of the buffer. There- for, rename keylen to bufsize where appropriate. Signed-off-by: Stefan Berger <stefanb@xxxxxxxxxxxxx> --- crypto/ecdsa.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/crypto/ecdsa.c b/crypto/ecdsa.c index 4daefb40c37a..4e847b59622a 100644 --- a/crypto/ecdsa.c +++ b/crypto/ecdsa.c @@ -35,8 +35,8 @@ struct ecdsa_signature_ctx { static int ecdsa_get_signature_rs(u64 *dest, size_t hdrlen, unsigned char tag, const void *value, size_t vlen, unsigned int ndigits) { - size_t keylen = ndigits * sizeof(u64); - ssize_t diff = vlen - keylen; + size_t bufsize = ndigits * sizeof(u64); + ssize_t diff = vlen - bufsize; const char *d = value; u8 rs[ECC_MAX_BYTES]; @@ -58,7 +58,7 @@ static int ecdsa_get_signature_rs(u64 *dest, size_t hdrlen, unsigned char tag, if (diff) return -EINVAL; } - if (-diff >= keylen) + if (-diff >= bufsize) return -EINVAL; if (diff) { @@ -138,7 +138,7 @@ static int ecdsa_verify(struct akcipher_request *req) { struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); struct ecc_ctx *ctx = akcipher_tfm_ctx(tfm); - size_t keylen = ctx->curve->g.ndigits * sizeof(u64); + size_t bufsize = ctx->curve->g.ndigits * sizeof(u64); struct ecdsa_signature_ctx sig_ctx = { .curve = ctx->curve, }; @@ -165,14 +165,14 @@ static int ecdsa_verify(struct akcipher_request *req) goto error; /* if the hash is shorter then we will add leading zeros to fit to ndigits */ - diff = keylen - req->dst_len; + diff = bufsize - req->dst_len; if (diff >= 0) { if (diff) memset(rawhash, 0, diff); memcpy(&rawhash[diff], buffer + req->src_len, req->dst_len); } else if (diff < 0) { /* given hash is longer, we take the left-most bytes */ - memcpy(&rawhash, buffer + req->src_len, keylen); + memcpy(&rawhash, buffer + req->src_len, bufsize); } ecc_swap_digits((u64 *)rawhash, hash, ctx->curve->g.ndigits); -- 2.43.0