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-rw-r--r--drivers/s390/crypto/zcrypt_cex2a.c78
-rw-r--r--drivers/s390/crypto/zcrypt_cex2a.h25
2 files changed, 87 insertions, 16 deletions
diff --git a/drivers/s390/crypto/zcrypt_cex2a.c b/drivers/s390/crypto/zcrypt_cex2a.c
index 9c409efa1ecf..def0901767de 100644
--- a/drivers/s390/crypto/zcrypt_cex2a.c
+++ b/drivers/s390/crypto/zcrypt_cex2a.c
@@ -41,7 +41,7 @@
#define CEX2A_MIN_MOD_SIZE 1 /* 8 bits */
#define CEX2A_MAX_MOD_SIZE 256 /* 2048 bits */
#define CEX3A_MIN_MOD_SIZE CEX2A_MIN_MOD_SIZE
-#define CEX3A_MAX_MOD_SIZE CEX2A_MAX_MOD_SIZE
+#define CEX3A_MAX_MOD_SIZE 512 /* 4096 bits */
#define CEX2A_SPEED_RATING 970
#define CEX3A_SPEED_RATING 900 /* Fixme: Needs finetuning */
@@ -49,8 +49,10 @@
#define CEX2A_MAX_MESSAGE_SIZE 0x390 /* sizeof(struct type50_crb2_msg) */
#define CEX2A_MAX_RESPONSE_SIZE 0x110 /* max outputdatalength + type80_hdr */
-#define CEX3A_MAX_MESSAGE_SIZE CEX2A_MAX_MESSAGE_SIZE
-#define CEX3A_MAX_RESPONSE_SIZE CEX2A_MAX_RESPONSE_SIZE
+#define CEX3A_MAX_RESPONSE_SIZE 0x210 /* 512 bit modulus
+ * (max outputdatalength) +
+ * type80_hdr*/
+#define CEX3A_MAX_MESSAGE_SIZE sizeof(struct type50_crb3_msg)
#define CEX2A_CLEANUP_TIME (15*HZ)
#define CEX3A_CLEANUP_TIME CEX2A_CLEANUP_TIME
@@ -110,7 +112,7 @@ static int ICAMEX_msg_to_type50MEX_msg(struct zcrypt_device *zdev,
mod = meb1->modulus + sizeof(meb1->modulus) - mod_len;
exp = meb1->exponent + sizeof(meb1->exponent) - mod_len;
inp = meb1->message + sizeof(meb1->message) - mod_len;
- } else {
+ } else if (mod_len <= 256) {
struct type50_meb2_msg *meb2 = ap_msg->message;
memset(meb2, 0, sizeof(*meb2));
ap_msg->length = sizeof(*meb2);
@@ -120,6 +122,17 @@ static int ICAMEX_msg_to_type50MEX_msg(struct zcrypt_device *zdev,
mod = meb2->modulus + sizeof(meb2->modulus) - mod_len;
exp = meb2->exponent + sizeof(meb2->exponent) - mod_len;
inp = meb2->message + sizeof(meb2->message) - mod_len;
+ } else {
+ /* mod_len > 256 = 4096 bit RSA Key */
+ struct type50_meb3_msg *meb3 = ap_msg->message;
+ memset(meb3, 0, sizeof(*meb3));
+ ap_msg->length = sizeof(*meb3);
+ meb3->header.msg_type_code = TYPE50_TYPE_CODE;
+ meb3->header.msg_len = sizeof(*meb3);
+ meb3->keyblock_type = TYPE50_MEB3_FMT;
+ mod = meb3->modulus + sizeof(meb3->modulus) - mod_len;
+ exp = meb3->exponent + sizeof(meb3->exponent) - mod_len;
+ inp = meb3->message + sizeof(meb3->message) - mod_len;
}
if (copy_from_user(mod, mex->n_modulus, mod_len) ||
@@ -142,7 +155,7 @@ static int ICACRT_msg_to_type50CRT_msg(struct zcrypt_device *zdev,
struct ap_message *ap_msg,
struct ica_rsa_modexpo_crt *crt)
{
- int mod_len, short_len, long_len, long_offset;
+ int mod_len, short_len, long_len, long_offset, limit;
unsigned char *p, *q, *dp, *dq, *u, *inp;
mod_len = crt->inputdatalength;
@@ -152,14 +165,20 @@ static int ICACRT_msg_to_type50CRT_msg(struct zcrypt_device *zdev,
/*
* CEX2A cannot handle p, dp, or U > 128 bytes.
* If we have one of these, we need to do extra checking.
+ * For CEX3A the limit is 256 bytes.
*/
- if (long_len > 128) {
+ if (zdev->max_mod_size == CEX3A_MAX_MOD_SIZE)
+ limit = 256;
+ else
+ limit = 128;
+
+ if (long_len > limit) {
/*
* zcrypt_rsa_crt already checked for the leading
* zeroes of np_prime, bp_key and u_mult_inc.
*/
- long_offset = long_len - 128;
- long_len = 128;
+ long_offset = long_len - limit;
+ long_len = limit;
} else
long_offset = 0;
@@ -180,7 +199,7 @@ static int ICACRT_msg_to_type50CRT_msg(struct zcrypt_device *zdev,
dq = crb1->dq + sizeof(crb1->dq) - short_len;
u = crb1->u + sizeof(crb1->u) - long_len;
inp = crb1->message + sizeof(crb1->message) - mod_len;
- } else {
+ } else if (long_len <= 128) {
struct type50_crb2_msg *crb2 = ap_msg->message;
memset(crb2, 0, sizeof(*crb2));
ap_msg->length = sizeof(*crb2);
@@ -193,6 +212,20 @@ static int ICACRT_msg_to_type50CRT_msg(struct zcrypt_device *zdev,
dq = crb2->dq + sizeof(crb2->dq) - short_len;
u = crb2->u + sizeof(crb2->u) - long_len;
inp = crb2->message + sizeof(crb2->message) - mod_len;
+ } else {
+ /* long_len >= 256 */
+ struct type50_crb3_msg *crb3 = ap_msg->message;
+ memset(crb3, 0, sizeof(*crb3));
+ ap_msg->length = sizeof(*crb3);
+ crb3->header.msg_type_code = TYPE50_TYPE_CODE;
+ crb3->header.msg_len = sizeof(*crb3);
+ crb3->keyblock_type = TYPE50_CRB3_FMT;
+ p = crb3->p + sizeof(crb3->p) - long_len;
+ q = crb3->q + sizeof(crb3->q) - short_len;
+ dp = crb3->dp + sizeof(crb3->dp) - long_len;
+ dq = crb3->dq + sizeof(crb3->dq) - short_len;
+ u = crb3->u + sizeof(crb3->u) - long_len;
+ inp = crb3->message + sizeof(crb3->message) - mod_len;
}
if (copy_from_user(p, crt->np_prime + long_offset, long_len) ||
@@ -203,7 +236,6 @@ static int ICACRT_msg_to_type50CRT_msg(struct zcrypt_device *zdev,
copy_from_user(inp, crt->inputdata, mod_len))
return -EFAULT;
-
return 0;
}
@@ -230,7 +262,10 @@ static int convert_type80(struct zcrypt_device *zdev,
zdev->online = 0;
return -EAGAIN; /* repeat the request on a different device. */
}
- BUG_ON(t80h->len > CEX2A_MAX_RESPONSE_SIZE);
+ if (zdev->user_space_type == ZCRYPT_CEX2A)
+ BUG_ON(t80h->len > CEX2A_MAX_RESPONSE_SIZE);
+ else
+ BUG_ON(t80h->len > CEX3A_MAX_RESPONSE_SIZE);
data = reply->message + t80h->len - outputdatalength;
if (copy_to_user(outputdata, data, outputdatalength))
return -EFAULT;
@@ -282,7 +317,10 @@ static void zcrypt_cex2a_receive(struct ap_device *ap_dev,
}
t80h = reply->message;
if (t80h->type == TYPE80_RSP_CODE) {
- length = min(CEX2A_MAX_RESPONSE_SIZE, (int) t80h->len);
+ if (ap_dev->device_type == AP_DEVICE_TYPE_CEX2A)
+ length = min(CEX2A_MAX_RESPONSE_SIZE, (int) t80h->len);
+ else
+ length = min(CEX3A_MAX_RESPONSE_SIZE, (int) t80h->len);
memcpy(msg->message, reply->message, length);
} else
memcpy(msg->message, reply->message, sizeof error_reply);
@@ -307,7 +345,10 @@ static long zcrypt_cex2a_modexpo(struct zcrypt_device *zdev,
int rc;
ap_init_message(&ap_msg);
- ap_msg.message = kmalloc(CEX2A_MAX_MESSAGE_SIZE, GFP_KERNEL);
+ if (zdev->user_space_type == ZCRYPT_CEX2A)
+ ap_msg.message = kmalloc(CEX2A_MAX_MESSAGE_SIZE, GFP_KERNEL);
+ else
+ ap_msg.message = kmalloc(CEX3A_MAX_MESSAGE_SIZE, GFP_KERNEL);
if (!ap_msg.message)
return -ENOMEM;
ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
@@ -345,7 +386,10 @@ static long zcrypt_cex2a_modexpo_crt(struct zcrypt_device *zdev,
int rc;
ap_init_message(&ap_msg);
- ap_msg.message = kmalloc(CEX2A_MAX_MESSAGE_SIZE, GFP_KERNEL);
+ if (zdev->user_space_type == ZCRYPT_CEX2A)
+ ap_msg.message = kmalloc(CEX2A_MAX_MESSAGE_SIZE, GFP_KERNEL);
+ else
+ ap_msg.message = kmalloc(CEX3A_MAX_MESSAGE_SIZE, GFP_KERNEL);
if (!ap_msg.message)
return -ENOMEM;
ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
@@ -404,8 +448,10 @@ static int zcrypt_cex2a_probe(struct ap_device *ap_dev)
return -ENOMEM;
zdev->user_space_type = ZCRYPT_CEX3A;
zdev->type_string = "CEX3A";
- zdev->min_mod_size = CEX3A_MIN_MOD_SIZE;
- zdev->max_mod_size = CEX3A_MAX_MOD_SIZE;
+ zdev->min_mod_size = CEX2A_MIN_MOD_SIZE;
+ zdev->max_mod_size = CEX2A_MAX_MOD_SIZE;
+ if (ap_4096_commands_available(ap_dev->qid))
+ zdev->max_mod_size = CEX3A_MAX_MOD_SIZE;
zdev->short_crt = 1;
zdev->speed_rating = CEX3A_SPEED_RATING;
break;
diff --git a/drivers/s390/crypto/zcrypt_cex2a.h b/drivers/s390/crypto/zcrypt_cex2a.h
index 8f69d1dacab8..0350665810cf 100644
--- a/drivers/s390/crypto/zcrypt_cex2a.h
+++ b/drivers/s390/crypto/zcrypt_cex2a.h
@@ -51,8 +51,10 @@ struct type50_hdr {
#define TYPE50_MEB1_FMT 0x0001
#define TYPE50_MEB2_FMT 0x0002
+#define TYPE50_MEB3_FMT 0x0003
#define TYPE50_CRB1_FMT 0x0011
#define TYPE50_CRB2_FMT 0x0012
+#define TYPE50_CRB3_FMT 0x0013
/* Mod-Exp, with a small modulus */
struct type50_meb1_msg {
@@ -74,6 +76,16 @@ struct type50_meb2_msg {
unsigned char message[256];
} __attribute__((packed));
+/* Mod-Exp, with a larger modulus */
+struct type50_meb3_msg {
+ struct type50_hdr header;
+ unsigned short keyblock_type; /* 0x0003 */
+ unsigned char reserved[6];
+ unsigned char exponent[512];
+ unsigned char modulus[512];
+ unsigned char message[512];
+} __attribute__((packed));
+
/* CRT, with a small modulus */
struct type50_crb1_msg {
struct type50_hdr header;
@@ -100,6 +112,19 @@ struct type50_crb2_msg {
unsigned char message[256];
} __attribute__((packed));
+/* CRT, with a larger modulus */
+struct type50_crb3_msg {
+ struct type50_hdr header;
+ unsigned short keyblock_type; /* 0x0013 */
+ unsigned char reserved[6];
+ unsigned char p[256];
+ unsigned char q[256];
+ unsigned char dp[256];
+ unsigned char dq[256];
+ unsigned char u[256];
+ unsigned char message[512];
+} __attribute__((packed));
+
/**
* The type 80 response family is associated with a CEX2A card.
*
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