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-rw-r--r--crypto/drbg.c127
1 files changed, 75 insertions, 52 deletions
diff --git a/crypto/drbg.c b/crypto/drbg.c
index 54cfd4820abc..d748a1d0ca24 100644
--- a/crypto/drbg.c
+++ b/crypto/drbg.c
@@ -98,6 +98,7 @@
*/
#include <crypto/drbg.h>
+#include <linux/string.h>
/***************************************************************
* Backend cipher definitions available to DRBG
@@ -283,38 +284,6 @@ static inline void drbg_cpu_to_be32(__u32 val, unsigned char *buf)
conversion->conv = cpu_to_be32(val);
}
-
-/*
- * Increment buffer
- *
- * @dst buffer to increment
- * @add value to add
- */
-static inline void drbg_add_buf(unsigned char *dst, size_t dstlen,
- const unsigned char *add, size_t addlen)
-{
- /* implied: dstlen > addlen */
- unsigned char *dstptr;
- const unsigned char *addptr;
- unsigned int remainder = 0;
- size_t len = addlen;
-
- dstptr = dst + (dstlen-1);
- addptr = add + (addlen-1);
- while (len) {
- remainder += *dstptr + *addptr;
- *dstptr = remainder & 0xff;
- remainder >>= 8;
- len--; dstptr--; addptr--;
- }
- len = dstlen - addlen;
- while (len && remainder > 0) {
- remainder = *dstptr + 1;
- *dstptr = remainder & 0xff;
- remainder >>= 8;
- len--; dstptr--;
- }
-}
#endif /* defined(CONFIG_CRYPTO_DRBG_HASH) || defined(CONFIG_CRYPTO_DRBG_CTR) */
/******************************************************************
@@ -323,6 +292,13 @@ static inline void drbg_add_buf(unsigned char *dst, size_t dstlen,
#ifdef CONFIG_CRYPTO_DRBG_CTR
#define CRYPTO_DRBG_CTR_STRING "CTR "
+MODULE_ALIAS_CRYPTO("drbg_pr_ctr_aes256");
+MODULE_ALIAS_CRYPTO("drbg_nopr_ctr_aes256");
+MODULE_ALIAS_CRYPTO("drbg_pr_ctr_aes192");
+MODULE_ALIAS_CRYPTO("drbg_nopr_ctr_aes192");
+MODULE_ALIAS_CRYPTO("drbg_pr_ctr_aes128");
+MODULE_ALIAS_CRYPTO("drbg_nopr_ctr_aes128");
+
static int drbg_kcapi_sym(struct drbg_state *drbg, const unsigned char *key,
unsigned char *outval, const struct drbg_string *in);
static int drbg_init_sym_kernel(struct drbg_state *drbg);
@@ -522,9 +498,9 @@ static int drbg_ctr_df(struct drbg_state *drbg,
ret = 0;
out:
- memset(iv, 0, drbg_blocklen(drbg));
- memset(temp, 0, drbg_statelen(drbg));
- memset(pad, 0, drbg_blocklen(drbg));
+ memzero_explicit(iv, drbg_blocklen(drbg));
+ memzero_explicit(temp, drbg_statelen(drbg));
+ memzero_explicit(pad, drbg_blocklen(drbg));
return ret;
}
@@ -554,7 +530,6 @@ static int drbg_ctr_update(struct drbg_state *drbg, struct list_head *seed,
unsigned char *temp_p, *df_data_p; /* pointer to iterate over buffers */
unsigned int len = 0;
struct drbg_string cipherin;
- unsigned char prefix = DRBG_PREFIX1;
memset(temp, 0, drbg_statelen(drbg) + drbg_blocklen(drbg));
if (3 > reseed)
@@ -574,7 +549,7 @@ static int drbg_ctr_update(struct drbg_state *drbg, struct list_head *seed,
*/
while (len < (drbg_statelen(drbg))) {
/* 10.2.1.2 step 2.1 */
- drbg_add_buf(drbg->V, drbg_blocklen(drbg), &prefix, 1);
+ crypto_inc(drbg->V, drbg_blocklen(drbg));
/*
* 10.2.1.2 step 2.2 */
ret = drbg_kcapi_sym(drbg, drbg->C, temp + len, &cipherin);
@@ -599,9 +574,9 @@ static int drbg_ctr_update(struct drbg_state *drbg, struct list_head *seed,
ret = 0;
out:
- memset(temp, 0, drbg_statelen(drbg) + drbg_blocklen(drbg));
+ memzero_explicit(temp, drbg_statelen(drbg) + drbg_blocklen(drbg));
if (2 != reseed)
- memset(df_data, 0, drbg_statelen(drbg));
+ memzero_explicit(df_data, drbg_statelen(drbg));
return ret;
}
@@ -617,7 +592,6 @@ static int drbg_ctr_generate(struct drbg_state *drbg,
int len = 0;
int ret = 0;
struct drbg_string data;
- unsigned char prefix = DRBG_PREFIX1;
memset(drbg->scratchpad, 0, drbg_blocklen(drbg));
@@ -629,7 +603,7 @@ static int drbg_ctr_generate(struct drbg_state *drbg,
}
/* 10.2.1.5.2 step 4.1 */
- drbg_add_buf(drbg->V, drbg_blocklen(drbg), &prefix, 1);
+ crypto_inc(drbg->V, drbg_blocklen(drbg));
drbg_string_fill(&data, drbg->V, drbg_blocklen(drbg));
while (len < buflen) {
int outlen = 0;
@@ -643,7 +617,7 @@ static int drbg_ctr_generate(struct drbg_state *drbg,
drbg_blocklen(drbg) : (buflen - len);
if (!drbg_fips_continuous_test(drbg, drbg->scratchpad)) {
/* 10.2.1.5.2 step 6 */
- drbg_add_buf(drbg->V, drbg_blocklen(drbg), &prefix, 1);
+ crypto_inc(drbg->V, drbg_blocklen(drbg));
continue;
}
/* 10.2.1.5.2 step 4.3 */
@@ -651,7 +625,7 @@ static int drbg_ctr_generate(struct drbg_state *drbg,
len += outlen;
/* 10.2.1.5.2 step 6 */
if (len < buflen)
- drbg_add_buf(drbg->V, drbg_blocklen(drbg), &prefix, 1);
+ crypto_inc(drbg->V, drbg_blocklen(drbg));
}
/* 10.2.1.5.2 step 6 */
@@ -660,7 +634,7 @@ static int drbg_ctr_generate(struct drbg_state *drbg,
len = ret;
out:
- memset(drbg->scratchpad, 0, drbg_blocklen(drbg));
+ memzero_explicit(drbg->scratchpad, drbg_blocklen(drbg));
return len;
}
@@ -685,6 +659,15 @@ static int drbg_fini_hash_kernel(struct drbg_state *drbg);
#ifdef CONFIG_CRYPTO_DRBG_HMAC
#define CRYPTO_DRBG_HMAC_STRING "HMAC "
+MODULE_ALIAS_CRYPTO("drbg_pr_hmac_sha512");
+MODULE_ALIAS_CRYPTO("drbg_nopr_hmac_sha512");
+MODULE_ALIAS_CRYPTO("drbg_pr_hmac_sha384");
+MODULE_ALIAS_CRYPTO("drbg_nopr_hmac_sha384");
+MODULE_ALIAS_CRYPTO("drbg_pr_hmac_sha256");
+MODULE_ALIAS_CRYPTO("drbg_nopr_hmac_sha256");
+MODULE_ALIAS_CRYPTO("drbg_pr_hmac_sha1");
+MODULE_ALIAS_CRYPTO("drbg_nopr_hmac_sha1");
+
/* update function of HMAC DRBG as defined in 10.1.2.2 */
static int drbg_hmac_update(struct drbg_state *drbg, struct list_head *seed,
int reseed)
@@ -796,6 +779,47 @@ static struct drbg_state_ops drbg_hmac_ops = {
#ifdef CONFIG_CRYPTO_DRBG_HASH
#define CRYPTO_DRBG_HASH_STRING "HASH "
+MODULE_ALIAS_CRYPTO("drbg_pr_sha512");
+MODULE_ALIAS_CRYPTO("drbg_nopr_sha512");
+MODULE_ALIAS_CRYPTO("drbg_pr_sha384");
+MODULE_ALIAS_CRYPTO("drbg_nopr_sha384");
+MODULE_ALIAS_CRYPTO("drbg_pr_sha256");
+MODULE_ALIAS_CRYPTO("drbg_nopr_sha256");
+MODULE_ALIAS_CRYPTO("drbg_pr_sha1");
+MODULE_ALIAS_CRYPTO("drbg_nopr_sha1");
+
+/*
+ * Increment buffer
+ *
+ * @dst buffer to increment
+ * @add value to add
+ */
+static inline void drbg_add_buf(unsigned char *dst, size_t dstlen,
+ const unsigned char *add, size_t addlen)
+{
+ /* implied: dstlen > addlen */
+ unsigned char *dstptr;
+ const unsigned char *addptr;
+ unsigned int remainder = 0;
+ size_t len = addlen;
+
+ dstptr = dst + (dstlen-1);
+ addptr = add + (addlen-1);
+ while (len) {
+ remainder += *dstptr + *addptr;
+ *dstptr = remainder & 0xff;
+ remainder >>= 8;
+ len--; dstptr--; addptr--;
+ }
+ len = dstlen - addlen;
+ while (len && remainder > 0) {
+ remainder = *dstptr + 1;
+ *dstptr = remainder & 0xff;
+ remainder >>= 8;
+ len--; dstptr--;
+ }
+}
+
/*
* scratchpad usage: as drbg_hash_update and drbg_hash_df are used
* interlinked, the scratchpad is used as follows:
@@ -848,7 +872,7 @@ static int drbg_hash_df(struct drbg_state *drbg,
}
out:
- memset(tmp, 0, drbg_blocklen(drbg));
+ memzero_explicit(tmp, drbg_blocklen(drbg));
return ret;
}
@@ -892,7 +916,7 @@ static int drbg_hash_update(struct drbg_state *drbg, struct list_head *seed,
ret = drbg_hash_df(drbg, drbg->C, drbg_statelen(drbg), &datalist2);
out:
- memset(drbg->scratchpad, 0, drbg_statelen(drbg));
+ memzero_explicit(drbg->scratchpad, drbg_statelen(drbg));
return ret;
}
@@ -927,7 +951,7 @@ static int drbg_hash_process_addtl(struct drbg_state *drbg,
drbg->scratchpad, drbg_blocklen(drbg));
out:
- memset(drbg->scratchpad, 0, drbg_blocklen(drbg));
+ memzero_explicit(drbg->scratchpad, drbg_blocklen(drbg));
return ret;
}
@@ -942,7 +966,6 @@ static int drbg_hash_hashgen(struct drbg_state *drbg,
unsigned char *dst = drbg->scratchpad + drbg_statelen(drbg);
struct drbg_string data;
LIST_HEAD(datalist);
- unsigned char prefix = DRBG_PREFIX1;
memset(src, 0, drbg_statelen(drbg));
memset(dst, 0, drbg_blocklen(drbg));
@@ -963,7 +986,7 @@ static int drbg_hash_hashgen(struct drbg_state *drbg,
outlen = (drbg_blocklen(drbg) < (buflen - len)) ?
drbg_blocklen(drbg) : (buflen - len);
if (!drbg_fips_continuous_test(drbg, dst)) {
- drbg_add_buf(src, drbg_statelen(drbg), &prefix, 1);
+ crypto_inc(src, drbg_statelen(drbg));
continue;
}
/* 10.1.1.4 step hashgen 4.2 */
@@ -971,11 +994,11 @@ static int drbg_hash_hashgen(struct drbg_state *drbg,
len += outlen;
/* 10.1.1.4 hashgen step 4.3 */
if (len < buflen)
- drbg_add_buf(src, drbg_statelen(drbg), &prefix, 1);
+ crypto_inc(src, drbg_statelen(drbg));
}
out:
- memset(drbg->scratchpad, 0,
+ memzero_explicit(drbg->scratchpad,
(drbg_statelen(drbg) + drbg_blocklen(drbg)));
return len;
}
@@ -1024,7 +1047,7 @@ static int drbg_hash_generate(struct drbg_state *drbg,
drbg_add_buf(drbg->V, drbg_statelen(drbg), u.req, 8);
out:
- memset(drbg->scratchpad, 0, drbg_blocklen(drbg));
+ memzero_explicit(drbg->scratchpad, drbg_blocklen(drbg));
return len;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 04:58:26 +0100