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| author | Stephan Müller <smueller@chronox.de> | 2021-11-21 15:51:44 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2021-11-26 16:25:18 +1100 |
| commit | 1e146c393b152a31771b49af5d104d9ed846da9b (patch) | |
| tree | 7abdac941c769c4d47bfbd3af4de0b57ce0af07a /crypto/dh.c | |
| parent | 1ce1bacc480965fab4420e561916ce45d2e90c05 (diff) | |
| download | lwn-1e146c393b152a31771b49af5d104d9ed846da9b.tar.gz lwn-1e146c393b152a31771b49af5d104d9ed846da9b.zip | |
crypto: dh - limit key size to 2048 in FIPS mode
FIPS disallows DH with keys < 2048 bits. Thus, the kernel should
consider the enforcement of this limit.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/dh.c')
| -rw-r--r-- | crypto/dh.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/crypto/dh.c b/crypto/dh.c index cd4f32092e5c..38557e64b4b3 100644 --- a/crypto/dh.c +++ b/crypto/dh.c @@ -5,6 +5,7 @@ * Authors: Salvatore Benedetto <salvatore.benedetto@intel.com> */ +#include <linux/fips.h> #include <linux/module.h> #include <crypto/internal/kpp.h> #include <crypto/kpp.h> @@ -47,6 +48,9 @@ static inline struct dh_ctx *dh_get_ctx(struct crypto_kpp *tfm) static int dh_check_params_length(unsigned int p_len) { + if (fips_enabled) + return (p_len < 2048) ? -EINVAL : 0; + return (p_len < 1536) ? -EINVAL : 0; } |