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upstream: Replace non-idiomatic strtoul(, 16) to parse a region 

of 2-character hex sequences with a low-level replacement designed just for
the task. ok djm

OpenBSD-Commit-ID: 67bab8b8a4329a19a0add5085eacd6f4cc215e85
This commit is contained in:
deraadt@openbsd.org 2024-04-02 09:32:28 +00:00 committed by Damien Miller
parent 019a5f483b
commit c7fec708f3
No known key found for this signature in database
1 changed files with 21 additions and 5 deletions
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26
ssh-pkcs11.c
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@ -1,4 +1,4 @@
/* $OpenBSD: ssh-pkcs11.c,v 1.59 2023/07/27 22:26:49 djm Exp $ */
/* $OpenBSD: ssh-pkcs11.c,v 1.60 2024/04/02 09:32:28 deraadt Exp $ */
/*
* Copyright (c) 2010 Markus Friedl. All rights reserved.
* Copyright (c) 2014 Pedro Martelletto. All rights reserved.
@ -1385,6 +1385,20 @@ pkcs11_rsa_generate_private_key(struct pkcs11_provider *p, CK_ULONG slotidx,
return pkcs11_fetch_rsa_pubkey(p, slotidx, &pubKey);
}
static int
h2i(char c)
{
if (c >= '0' && c <= '9')
c -= '0';
else if (c >= 'a' && c <= 'f')
c -= 'a';
else if (c >= 'A' && c <= 'F')
c -= 'A';
else
return -1;
return c;
}
static int
pkcs11_decode_hex(const char *hex, unsigned char **dest, size_t *rlen)
{
@ -1404,11 +1418,13 @@ pkcs11_decode_hex(const char *hex, unsigned char **dest, size_t *rlen)
ptr[2] = '\0';
for (i = 0; i < len; i++) {
ptr[0] = hex[2 * i];
ptr[1] = hex[(2 * i) + 1];
if (!isxdigit(ptr[0]) || !isxdigit(ptr[1]))
int hi, low;
hi = h2i(hex[2 * i]);
lo = h2i(hex[(2 * i) + 1]);
if (hi == -1 || lo == -1)
return -1;
(*dest)[i] = (unsigned char)strtoul(ptr, NULL, 16);
(*dest)[i] = (hi << 4) | lo;
}
if (rlen)