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Date: Wed, 16 Jul 2008 16:29:16 -0400
From: Neil Horman <nhorman@...driver.com>
To: linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: herbert@...dor.apana.org.au, davem@...emloft.net,
nhorman@...driver.com
Subject: [PATCH] prng: fix a few misc bugs in prng
Fixing a few misc bugs in prng.c:
- Remove prng_key/prng_iv from prng_context (both kept in tfm ptr)
- Making _get_more_prng_bytes return meaningful err codes (not just -1/0)
Signed-off-by: Neil Horman <nhorman@...driver.com>
crypto/prng.c | 26 +++++++++-----------------
firmware/Makefile | 4 ++--
2 files changed, 11 insertions(+), 19 deletions(-)
diff --git a/crypto/prng.c b/crypto/prng.c
index 7aeb0d0..933b4bc 100644
--- a/crypto/prng.c
+++ b/crypto/prng.c
@@ -56,8 +56,6 @@
struct prng_context {
- char *prng_key;
- char *prng_iv;
spinlock_t prng_lock;
unsigned char rand_data[DEFAULT_BLK_SZ];
unsigned char last_rand_data[DEFAULT_BLK_SZ];
@@ -158,7 +156,7 @@ static int _get_more_prng_bytes(struct prng_context *ctx)
"ctx %p Failed repetition check!\n",
ctx);
ctx->flags |= PRNG_NEED_RESET;
- return -1;
+ return -EFAULT;
}
memcpy(ctx->last_rand_data, ctx->rand_data,
DEFAULT_BLK_SZ);
@@ -186,7 +184,7 @@ static int _get_more_prng_bytes(struct prng_context *ctx)
dbgprint(KERN_CRIT
"Crypt of block failed for context %p\n", ctx);
ctx->rand_data_valid = DEFAULT_BLK_SZ;
- return -1;
+ return -EFAULT;
}
}
@@ -273,7 +271,7 @@ remainder:
for (; byte_count >= DEFAULT_BLK_SZ; byte_count -= DEFAULT_BLK_SZ) {
if (_get_more_prng_bytes(ctx) < 0) {
memset(buf, 0, nbytes);
- err = -1;
+ err = -EFAULT;
goto done;
}
memcpy(ptr, ctx->rand_data, DEFAULT_BLK_SZ);
@@ -329,19 +327,14 @@ int reset_prng_context(struct prng_context *ctx,
int ret;
int iv_len;
int rc = -EFAULT;
-
+ unsigned char *prng_key;
+ unsigned char *prng_iv;
spin_lock(&ctx->prng_lock);
ctx->flags |= PRNG_NEED_RESET;
- if (key)
- memcpy(ctx->prng_key, key, strlen(ctx->prng_key));
- else
- ctx->prng_key = DEFAULT_PRNG_KEY;
+ prng_key = (key != NULL) ? key : (unsigned char *)DEFAULT_PRNG_KEY;
- if (iv)
- memcpy(ctx->prng_iv, iv, strlen(ctx->prng_iv));
- else
- ctx->prng_iv = DEFAULT_PRNG_IV;
+ prng_iv = iv ? iv : (unsigned char *)DEFAULT_PRNG_IV;
if (V)
memcpy(ctx->V, V, DEFAULT_BLK_SZ);
@@ -369,8 +362,7 @@ int reset_prng_context(struct prng_context *ctx,
ctx->rand_data_valid = DEFAULT_BLK_SZ;
- ret = crypto_blkcipher_setkey(ctx->tfm, ctx->prng_key,
- strlen(ctx->prng_key));
+ ret = crypto_blkcipher_setkey(ctx->tfm, prng_key, strlen(prng_key));
if (ret) {
dbgprint(KERN_CRIT "PRNG: setkey() failed flags=%x\n",
crypto_blkcipher_get_flags(ctx->tfm));
@@ -380,7 +372,7 @@ int reset_prng_context(struct prng_context *ctx,
iv_len = crypto_blkcipher_ivsize(ctx->tfm);
if (iv_len)
- crypto_blkcipher_set_iv(ctx->tfm, ctx->prng_iv, iv_len);
+ crypto_blkcipher_set_iv(ctx->tfm, prng_iv, iv_len);
rc = 0;
ctx->flags &= ~PRNG_NEED_RESET;
diff --git a/firmware/Makefile b/firmware/Makefile
index 809a526..3515814 100644
--- a/firmware/Makefile
+++ b/firmware/Makefile
@@ -34,8 +34,8 @@ fw-shipped-$(CONFIG_SND_SB16_CSP) += sb16/mulaw_main.csp sb16/alaw_main.csp \
sb16/ima_adpcm_capture.csp
fw-shipped-$(CONFIG_SND_YMFPCI) += yamaha/ds1_ctrl.fw yamaha/ds1_dsp.fw \
yamaha/ds1e_ctrl.fw
-fw-shipped-$(CONFIG_TIGON3) += tigon/tg3.bin tigon/tg3_tso.bin \
- tigon/tg3_tso5.bin
+#fw-shipped-$(CONFIG_TIGON3) += tigon/tg3.bin tigon/tg3_tso.bin \
+# tigon/tg3_tso5.bin
fw-shipped-$(CONFIG_USB_DABUSB) += dabusb/firmware.fw dabusb/bitstream.bin
fw-shipped-$(CONFIG_USB_EMI26) += emi26/loader.fw emi26/firmware.fw \
emi26/bitstream.fw
--
/****************************************************
* Neil Horman <nhorman@...driver.com>
* Software Engineer, Red Hat
****************************************************/
--
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