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pkcs5v2: Add pkcs5v2_genkey_raw function

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This is like pkcs5v2_genkey but takes a "passphrase" as a buffer and
length rather than a NUL-terminated string.

Reviwed by:	pjd
MFC after:	1 week
Sponsored by:	Amazon
Differential Revision:	https://reviews.freebsd.org/D46633

(cherry picked from commit 8ce291a335bc751e7a89691eebfb9f9da65b82ac)
This commit is contained in:
Colin Percival 2024-09-18 04:02:05 -07:00
parent 0a8ff19896
commit 8d2d49bdb5
2 changed files with 14 additions and 2 deletions
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13
sys/geom/eli/pkcs5v2.c
View file

@ -52,13 +52,22 @@ void
pkcs5v2_genkey(uint8_t *key, unsigned keylen, const uint8_t *salt,
size_t saltsize, const char *passphrase, u_int iterations)
{
pkcs5v2_genkey_raw(key, keylen, salt, saltsize, passphrase,
strlen(passphrase), iterations);
}
void
pkcs5v2_genkey_raw(uint8_t *key, unsigned keylen, const uint8_t *salt,
size_t saltsize, const uint8_t *passphrase, size_t passlen,
u_int iterations)
{
uint8_t md[SHA512_MDLEN], saltcount[saltsize + sizeof(uint32_t)];
uint8_t *counter, *keyp;
u_int i, bsize, passlen;
u_int i, bsize;
uint32_t count;
struct hmac_ctx startpoint, ctx;
passlen = strlen(passphrase);
bzero(key, keylen);
bcopy(salt, saltcount, saltsize);
counter = saltcount + saltsize;

3
sys/geom/eli/pkcs5v2.h
View file

@ -30,6 +30,9 @@
#define _PKCS5V2_H_
void pkcs5v2_genkey(uint8_t *key, unsigned keylen, const uint8_t *salt,
size_t saltsize, const char *passphrase, u_int iterations);
void pkcs5v2_genkey_raw(uint8_t *key, unsigned keylen, const uint8_t *salt,
size_t saltsize, const uint8_t *passphrase, size_t passlen,
u_int iterations);
#ifndef _KERNEL
int pkcs5v2_calculate(int usecs);
#endif