diff options
| author | Lukas Wunner <lukas@wunner.de> | 2024-09-10 16:30:15 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2024-10-05 13:22:04 +0800 |
| commit | 7964b0d4bd1271f82d6b455366a200d320f7dbf8 (patch) | |
| tree | 8d5c04a910f873f121d962185f5ab64bc91fc667 /include/crypto | |
| parent | ae117924b291b2ccf6be0fe197695c96fc62e78c (diff) | |
crypto: rsa-pkcs1pad - Deduplicate set_{pub,priv}_key callbacks
pkcs1pad_set_pub_key() and pkcs1pad_set_priv_key() are almost identical.
The upcoming migration of sign/verify operations from rsa-pkcs1pad.c
into a separate crypto_template will require another copy of the exact
same functions. When RSASSA-PSS and RSAES-OAEP are introduced, each
will need yet another copy.
Deduplicate the functions into a single one which lives in a common
header file for reuse by RSASSA-PKCS1-v1_5, RSASSA-PSS and RSAES-OAEP.
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/crypto')
| -rw-r--r-- | include/crypto/internal/rsa.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/include/crypto/internal/rsa.h b/include/crypto/internal/rsa.h index e870133f4b77..754f687134df 100644 --- a/include/crypto/internal/rsa.h +++ b/include/crypto/internal/rsa.h @@ -8,6 +8,7 @@ #ifndef _RSA_HELPER_ #define _RSA_HELPER_ #include <linux/types.h> +#include <crypto/akcipher.h> /** * rsa_key - RSA key structure @@ -53,5 +54,32 @@ int rsa_parse_pub_key(struct rsa_key *rsa_key, const void *key, int rsa_parse_priv_key(struct rsa_key *rsa_key, const void *key, unsigned int key_len); +#define RSA_PUB (true) +#define RSA_PRIV (false) + +static inline int rsa_set_key(struct crypto_akcipher *child, + unsigned int *key_size, bool is_pubkey, + const void *key, unsigned int keylen) +{ + int err; + + *key_size = 0; + + if (is_pubkey) + err = crypto_akcipher_set_pub_key(child, key, keylen); + else + err = crypto_akcipher_set_priv_key(child, key, keylen); + if (err) + return err; + + /* Find out new modulus size from rsa implementation */ + err = crypto_akcipher_maxsize(child); + if (err > PAGE_SIZE) + return -ENOTSUPP; + + *key_size = err; + return 0; +} + extern struct crypto_template rsa_pkcs1pad_tmpl; #endif |