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-rw-r--r--arch/s390/crypto/prng.c101
1 files changed, 26 insertions, 75 deletions
diff --git a/arch/s390/crypto/prng.c b/arch/s390/crypto/prng.c
index 41527b113f5a..9cc050f9536c 100644
--- a/arch/s390/crypto/prng.c
+++ b/arch/s390/crypto/prng.c
@@ -135,12 +135,7 @@ static int generate_entropy(u8 *ebuf, size_t nbytes)
else
h = ebuf;
/* generate sha256 from this page */
- if (cpacf_kimd(CPACF_KIMD_SHA_256, h,
- pg, PAGE_SIZE) != PAGE_SIZE) {
- prng_errorflag = PRNG_GEN_ENTROPY_FAILED;
- ret = -EIO;
- goto out;
- }
+ cpacf_kimd(CPACF_KIMD_SHA_256, h, pg, PAGE_SIZE);
if (n < sizeof(hash))
memcpy(ebuf, hash, n);
ret += n;
@@ -148,7 +143,6 @@ static int generate_entropy(u8 *ebuf, size_t nbytes)
nbytes -= n;
}
-out:
free_page((unsigned long)pg);
return ret;
}
@@ -160,13 +154,11 @@ static void prng_tdes_add_entropy(void)
{
__u64 entropy[4];
unsigned int i;
- int ret;
for (i = 0; i < 16; i++) {
- ret = cpacf_kmc(CPACF_KMC_PRNG, prng_data->prngws.parm_block,
- (char *)entropy, (char *)entropy,
- sizeof(entropy));
- BUG_ON(ret < 0 || ret != sizeof(entropy));
+ cpacf_kmc(CPACF_KMC_PRNG, prng_data->prngws.parm_block,
+ (char *) entropy, (char *) entropy,
+ sizeof(entropy));
memcpy(prng_data->prngws.parm_block, entropy, sizeof(entropy));
}
}
@@ -303,21 +295,14 @@ static int __init prng_sha512_selftest(void)
0x21, 0xe4, 0xb0, 0x86, 0x44, 0xf6, 0x72, 0x7c,
0x36, 0x8c, 0x5a, 0x9f, 0x7a, 0x4b, 0x3e, 0xe2 };
- int ret = 0;
u8 buf[sizeof(random)];
struct ppno_ws_s ws;
memset(&ws, 0, sizeof(ws));
/* initial seed */
- ret = cpacf_ppno(CPACF_PPNO_SHA512_DRNG_SEED, &ws, NULL, 0,
- seed, sizeof(seed));
- if (ret < 0) {
- pr_err("The prng self test seed operation for the "
- "SHA-512 mode failed with rc=%d\n", ret);
- prng_errorflag = PRNG_SELFTEST_FAILED;
- return -EIO;
- }
+ cpacf_ppno(CPACF_PPNO_SHA512_DRNG_SEED,
+ &ws, NULL, 0, seed, sizeof(seed));
/* check working states V and C */
if (memcmp(ws.V, V0, sizeof(V0)) != 0
@@ -329,22 +314,10 @@ static int __init prng_sha512_selftest(void)
}
/* generate random bytes */
- ret = cpacf_ppno(CPACF_PPNO_SHA512_DRNG_GEN,
- &ws, buf, sizeof(buf), NULL, 0);
- if (ret < 0) {
- pr_err("The prng self test generate operation for "
- "the SHA-512 mode failed with rc=%d\n", ret);
- prng_errorflag = PRNG_SELFTEST_FAILED;
- return -EIO;
- }
- ret = cpacf_ppno(CPACF_PPNO_SHA512_DRNG_GEN,
- &ws, buf, sizeof(buf), NULL, 0);
- if (ret < 0) {
- pr_err("The prng self test generate operation for "
- "the SHA-512 mode failed with rc=%d\n", ret);
- prng_errorflag = PRNG_SELFTEST_FAILED;
- return -EIO;
- }
+ cpacf_ppno(CPACF_PPNO_SHA512_DRNG_GEN,
+ &ws, buf, sizeof(buf), NULL, 0);
+ cpacf_ppno(CPACF_PPNO_SHA512_DRNG_GEN,
+ &ws, buf, sizeof(buf), NULL, 0);
/* check against expected data */
if (memcmp(buf, random, sizeof(random)) != 0) {
@@ -392,26 +365,16 @@ static int __init prng_sha512_instantiate(void)
get_tod_clock_ext(seed + 48);
/* initial seed of the ppno drng */
- ret = cpacf_ppno(CPACF_PPNO_SHA512_DRNG_SEED,
- &prng_data->ppnows, NULL, 0, seed, sizeof(seed));
- if (ret < 0) {
- prng_errorflag = PRNG_SEED_FAILED;
- ret = -EIO;
- goto outfree;
- }
+ cpacf_ppno(CPACF_PPNO_SHA512_DRNG_SEED,
+ &prng_data->ppnows, NULL, 0, seed, sizeof(seed));
/* if fips mode is enabled, generate a first block of random
bytes for the FIPS 140-2 Conditional Self Test */
if (fips_enabled) {
prng_data->prev = prng_data->buf + prng_chunk_size;
- ret = cpacf_ppno(CPACF_PPNO_SHA512_DRNG_GEN,
- &prng_data->ppnows,
- prng_data->prev, prng_chunk_size, NULL, 0);
- if (ret < 0 || ret != prng_chunk_size) {
- prng_errorflag = PRNG_GEN_FAILED;
- ret = -EIO;
- goto outfree;
- }
+ cpacf_ppno(CPACF_PPNO_SHA512_DRNG_GEN,
+ &prng_data->ppnows,
+ prng_data->prev, prng_chunk_size, NULL, 0);
}
return 0;
@@ -440,12 +403,8 @@ static int prng_sha512_reseed(void)
return ret;
/* do a reseed of the ppno drng with this bytestring */
- ret = cpacf_ppno(CPACF_PPNO_SHA512_DRNG_SEED,
- &prng_data->ppnows, NULL, 0, seed, sizeof(seed));
- if (ret) {
- prng_errorflag = PRNG_RESEED_FAILED;
- return -EIO;
- }
+ cpacf_ppno(CPACF_PPNO_SHA512_DRNG_SEED,
+ &prng_data->ppnows, NULL, 0, seed, sizeof(seed));
return 0;
}
@@ -463,12 +422,8 @@ static int prng_sha512_generate(u8 *buf, size_t nbytes)
}
/* PPNO generate */
- ret = cpacf_ppno(CPACF_PPNO_SHA512_DRNG_GEN,
- &prng_data->ppnows, buf, nbytes, NULL, 0);
- if (ret < 0 || ret != nbytes) {
- prng_errorflag = PRNG_GEN_FAILED;
- return -EIO;
- }
+ cpacf_ppno(CPACF_PPNO_SHA512_DRNG_GEN,
+ &prng_data->ppnows, buf, nbytes, NULL, 0);
/* FIPS 140-2 Conditional Self Test */
if (fips_enabled) {
@@ -479,7 +434,7 @@ static int prng_sha512_generate(u8 *buf, size_t nbytes)
memcpy(prng_data->prev, buf, nbytes);
}
- return ret;
+ return nbytes;
}
@@ -494,7 +449,7 @@ static int prng_open(struct inode *inode, struct file *file)
static ssize_t prng_tdes_read(struct file *file, char __user *ubuf,
size_t nbytes, loff_t *ppos)
{
- int chunk, n, tmp, ret = 0;
+ int chunk, n, ret = 0;
/* lock prng_data struct */
if (mutex_lock_interruptible(&prng_data->mutex))
@@ -545,13 +500,9 @@ static ssize_t prng_tdes_read(struct file *file, char __user *ubuf,
*
* Note: you can still get strict X9.17 conformity by setting
* prng_chunk_size to 8 bytes.
- */
- tmp = cpacf_kmc(CPACF_KMC_PRNG, prng_data->prngws.parm_block,
- prng_data->buf, prng_data->buf, n);
- if (tmp < 0 || tmp != n) {
- ret = -EIO;
- break;
- }
+ */
+ cpacf_kmc(CPACF_KMC_PRNG, prng_data->prngws.parm_block,
+ prng_data->buf, prng_data->buf, n);
prng_data->prngws.byte_counter += n;
prng_data->prngws.reseed_counter += n;
@@ -806,13 +757,13 @@ static int __init prng_init(void)
int ret;
/* check if the CPU has a PRNG */
- if (!cpacf_query(CPACF_KMC, CPACF_KMC_PRNG))
+ if (!cpacf_query_func(CPACF_KMC, CPACF_KMC_PRNG))
return -EOPNOTSUPP;
/* choose prng mode */
if (prng_mode != PRNG_MODE_TDES) {
/* check for MSA5 support for PPNO operations */
- if (!cpacf_query(CPACF_PPNO, CPACF_PPNO_SHA512_DRNG_GEN)) {
+ if (!cpacf_query_func(CPACF_PPNO, CPACF_PPNO_SHA512_DRNG_GEN)) {
if (prng_mode == PRNG_MODE_SHA512) {
pr_err("The prng module cannot "
"start in SHA-512 mode\n");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.