diff options
Diffstat (limited to 'crypto/dh_helper.c')
| -rw-r--r-- | crypto/dh_helper.c | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/crypto/dh_helper.c b/crypto/dh_helper.c index aabc91e4f63f..2d499879328b 100644 --- a/crypto/dh_helper.c +++ b/crypto/dh_helper.c @@ -63,7 +63,7 @@ int crypto_dh_encode_key(char *buf, unsigned int len, const struct dh *params) } EXPORT_SYMBOL_GPL(crypto_dh_encode_key); -int crypto_dh_decode_key(const char *buf, unsigned int len, struct dh *params) +int __crypto_dh_decode_key(const char *buf, unsigned int len, struct dh *params) { const u8 *ptr = buf; struct kpp_secret secret; @@ -81,6 +81,24 @@ int crypto_dh_decode_key(const char *buf, unsigned int len, struct dh *params) if (secret.len != crypto_dh_key_len(params)) return -EINVAL; + /* Don't allocate memory. Set pointers to data within + * the given buffer + */ + params->key = (void *)ptr; + params->p = (void *)(ptr + params->key_size); + params->g = (void *)(ptr + params->key_size + params->p_size); + + return 0; +} + +int crypto_dh_decode_key(const char *buf, unsigned int len, struct dh *params) +{ + int err; + + err = __crypto_dh_decode_key(buf, len, params); + if (err) + return err; + /* * Don't permit the buffer for 'key' or 'g' to be larger than 'p', since * some drivers assume otherwise. @@ -89,13 +107,6 @@ int crypto_dh_decode_key(const char *buf, unsigned int len, struct dh *params) params->g_size > params->p_size) return -EINVAL; - /* Don't allocate memory. Set pointers to data within - * the given buffer - */ - params->key = (void *)ptr; - params->p = (void *)(ptr + params->key_size); - params->g = (void *)(ptr + params->key_size + params->p_size); - /* * Don't permit 'p' to be 0. It's not a prime number, and it's subject * to corner cases such as 'mod 0' being undefined or |