[S390] zcrypt PCICC, PCIXCC coprocessor card ap bus drivers.

Signed-off-by: Ralph Wuerthner <rwuerthn@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 350 insertions, 0 deletions

diff --git a/drivers/s390/crypto/zcrypt_cca_key.h b/drivers/s390/crypto/zcrypt_cca_key.h
new file mode 100644
index 000000000000..c80f40d44197
--- /dev/null
+++ b/drivers/s390/crypto/zcrypt_cca_key.h
@@ -0,0 +1,350 @@
+/*
+ *  linux/drivers/s390/crypto/zcrypt_cca_key.h
+ *
+ *  zcrypt 2.0.0
+ *
+ *  Copyright (C)  2001, 2006 IBM Corporation
+ *  Author(s): Robert Burroughs
+ *	       Eric Rossman (edrossma@us.ibm.com)
+ *
+ *  Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
+ *  Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef _ZCRYPT_CCA_KEY_H_
+#define _ZCRYPT_CCA_KEY_H_
+
+struct T6_keyBlock_hdr {
+	unsigned short blen;
+	unsigned short ulen;
+	unsigned short flags;
+};
+
+/**
+ * mapping for the cca private ME key token.
+ * Three parts of interest here: the header, the private section and
+ * the public section.
+ *
+ * mapping for the cca key token header
+ */
+struct cca_token_hdr {
+	unsigned char  token_identifier;
+	unsigned char  version;
+	unsigned short token_length;
+	unsigned char  reserved[4];
+} __attribute__((packed));
+
+#define CCA_TKN_HDR_ID_EXT 0x1E
+
+/**
+ * mapping for the cca private ME section
+ */
+struct cca_private_ext_ME_sec {
+	unsigned char  section_identifier;
+	unsigned char  version;
+	unsigned short section_length;
+	unsigned char  private_key_hash[20];
+	unsigned char  reserved1[4];
+	unsigned char  key_format;
+	unsigned char  reserved2;
+	unsigned char  key_name_hash[20];
+	unsigned char  key_use_flags[4];
+	unsigned char  reserved3[6];
+	unsigned char  reserved4[24];
+	unsigned char  confounder[24];
+	unsigned char  exponent[128];
+	unsigned char  modulus[128];
+} __attribute__((packed));
+
+#define CCA_PVT_USAGE_ALL 0x80
+
+/**
+ * mapping for the cca public section
+ * In a private key, the modulus doesn't appear in the public
+ * section. So, an arbitrary public exponent of 0x010001 will be
+ * used, for a section length of 0x0F always.
+ */
+struct cca_public_sec {
+	unsigned char  section_identifier;
+	unsigned char  version;
+	unsigned short section_length;
+	unsigned char  reserved[2];
+	unsigned short exponent_len;
+	unsigned short modulus_bit_len;
+	unsigned short modulus_byte_len;    /* In a private key, this is 0 */
+} __attribute__((packed));
+
+/**
+ * mapping for the cca private CRT key 'token'
+ * The first three parts (the only parts considered in this release)
+ * are: the header, the private section and the public section.
+ * The header and public section are the same as for the
+ * struct cca_private_ext_ME
+ *
+ * Following the structure are the quantities p, q, dp, dq, u, pad,
+ * and modulus, in that order, where pad_len is the modulo 8
+ * complement of the residue modulo 8 of the sum of
+ * (p_len + q_len + dp_len + dq_len + u_len).
+ */
+struct cca_pvt_ext_CRT_sec {
+	unsigned char  section_identifier;
+	unsigned char  version;
+	unsigned short section_length;
+	unsigned char  private_key_hash[20];
+	unsigned char  reserved1[4];
+	unsigned char  key_format;
+	unsigned char  reserved2;
+	unsigned char  key_name_hash[20];
+	unsigned char  key_use_flags[4];
+	unsigned short p_len;
+	unsigned short q_len;
+	unsigned short dp_len;
+	unsigned short dq_len;
+	unsigned short u_len;
+	unsigned short mod_len;
+	unsigned char  reserved3[4];
+	unsigned short pad_len;
+	unsigned char  reserved4[52];
+	unsigned char  confounder[8];
+} __attribute__((packed));
+
+#define CCA_PVT_EXT_CRT_SEC_ID_PVT 0x08
+#define CCA_PVT_EXT_CRT_SEC_FMT_CL 0x40
+
+/**
+ * Set up private key fields of a type6 MEX message.
+ * Note that all numerics in the key token are big-endian,
+ * while the entries in the key block header are little-endian.
+ *
+ * @mex: pointer to user input data
+ * @p: pointer to memory area for the key
+ *
+ * Returns the size of the key area or -EFAULT
+ */
+static inline int zcrypt_type6_mex_key_de(struct ica_rsa_modexpo *mex,
+					  void *p, int big_endian)
+{
+	static struct cca_token_hdr static_pvt_me_hdr = {
+		.token_identifier	=  0x1E,
+		.token_length		=  0x0183,
+	};
+	static struct cca_private_ext_ME_sec static_pvt_me_sec = {
+		.section_identifier	=  0x02,
+		.section_length		=  0x016C,
+		.key_use_flags		= {0x80,0x00,0x00,0x00},
+	};
+	static struct cca_public_sec static_pub_me_sec = {
+		.section_identifier	=  0x04,
+		.section_length		=  0x000F,
+		.exponent_len		=  0x0003,
+	};
+	static char pk_exponent[3] = { 0x01, 0x00, 0x01 };
+	struct {
+		struct T6_keyBlock_hdr t6_hdr;
+		struct cca_token_hdr pvtMeHdr;
+		struct cca_private_ext_ME_sec pvtMeSec;
+		struct cca_public_sec pubMeSec;
+		char exponent[3];
+	} __attribute__((packed)) *key = p;
+	unsigned char *temp;
+
+	memset(key, 0, sizeof(*key));
+
+	if (big_endian) {
+		key->t6_hdr.blen = cpu_to_be16(0x189);
+		key->t6_hdr.ulen = cpu_to_be16(0x189 - 2);
+	} else {
+		key->t6_hdr.blen = cpu_to_le16(0x189);
+		key->t6_hdr.ulen = cpu_to_le16(0x189 - 2);
+	}
+	key->pvtMeHdr = static_pvt_me_hdr;
+	key->pvtMeSec = static_pvt_me_sec;
+	key->pubMeSec = static_pub_me_sec;
+	/**
+	 * In a private key, the modulus doesn't appear in the public
+	 * section. So, an arbitrary public exponent of 0x010001 will be
+	 * used.
+	 */
+	memcpy(key->exponent, pk_exponent, 3);
+
+	/* key parameter block */
+	temp = key->pvtMeSec.exponent +
+		sizeof(key->pvtMeSec.exponent) - mex->inputdatalength;
+	if (copy_from_user(temp, mex->b_key, mex->inputdatalength))
+		return -EFAULT;
+
+	/* modulus */
+	temp = key->pvtMeSec.modulus +
+		sizeof(key->pvtMeSec.modulus) - mex->inputdatalength;
+	if (copy_from_user(temp, mex->n_modulus, mex->inputdatalength))
+		return -EFAULT;
+	key->pubMeSec.modulus_bit_len = 8 * mex->inputdatalength;
+	return sizeof(*key);
+}
+
+/**
+ * Set up private key fields of a type6 MEX message. The _pad variant
+ * strips leading zeroes from the b_key.
+ * Note that all numerics in the key token are big-endian,
+ * while the entries in the key block header are little-endian.
+ *
+ * @mex: pointer to user input data
+ * @p: pointer to memory area for the key
+ *
+ * Returns the size of the key area or -EFAULT
+ */
+static inline int zcrypt_type6_mex_key_en(struct ica_rsa_modexpo *mex,
+					  void *p, int big_endian)
+{
+	static struct cca_token_hdr static_pub_hdr = {
+		.token_identifier	=  0x1E,
+	};
+	static struct cca_public_sec static_pub_sec = {
+		.section_identifier	=  0x04,
+	};
+	struct {
+		struct T6_keyBlock_hdr t6_hdr;
+		struct cca_token_hdr pubHdr;
+		struct cca_public_sec pubSec;
+		char exponent[0];
+	} __attribute__((packed)) *key = p;
+	unsigned char *temp;
+	int i;
+
+	memset(key, 0, sizeof(*key));
+
+	key->pubHdr = static_pub_hdr;
+	key->pubSec = static_pub_sec;
+
+	/* key parameter block */
+	temp = key->exponent;
+	if (copy_from_user(temp, mex->b_key, mex->inputdatalength))
+		return -EFAULT;
+	/* Strip leading zeroes from b_key. */
+	for (i = 0; i < mex->inputdatalength; i++)
+		if (temp[i])
+			break;
+	if (i >= mex->inputdatalength)
+		return -EINVAL;
+	memmove(temp, temp + i, mex->inputdatalength - i);
+	temp += mex->inputdatalength - i;
+	/* modulus */
+	if (copy_from_user(temp, mex->n_modulus, mex->inputdatalength))
+		return -EFAULT;
+
+	key->pubSec.modulus_bit_len = 8 * mex->inputdatalength;
+	key->pubSec.modulus_byte_len = mex->inputdatalength;
+	key->pubSec.exponent_len = mex->inputdatalength - i;
+	key->pubSec.section_length = sizeof(key->pubSec) +
+					2*mex->inputdatalength - i;
+	key->pubHdr.token_length =
+		key->pubSec.section_length + sizeof(key->pubHdr);
+	if (big_endian) {
+		key->t6_hdr.ulen = cpu_to_be16(key->pubHdr.token_length + 4);
+		key->t6_hdr.blen = cpu_to_be16(key->pubHdr.token_length + 6);
+	} else {
+		key->t6_hdr.ulen = cpu_to_le16(key->pubHdr.token_length + 4);
+		key->t6_hdr.blen = cpu_to_le16(key->pubHdr.token_length + 6);
+	}
+	return sizeof(*key) + 2*mex->inputdatalength - i;
+}
+
+/**
+ * Set up private key fields of a type6 CRT message.
+ * Note that all numerics in the key token are big-endian,
+ * while the entries in the key block header are little-endian.
+ *
+ * @mex: pointer to user input data
+ * @p: pointer to memory area for the key
+ *
+ * Returns the size of the key area or -EFAULT
+ */
+static inline int zcrypt_type6_crt_key(struct ica_rsa_modexpo_crt *crt,
+				       void *p, int big_endian)
+{
+	static struct cca_public_sec static_cca_pub_sec = {
+		.section_identifier = 4,
+		.section_length = 0x000f,
+		.exponent_len = 0x0003,
+	};
+	static char pk_exponent[3] = { 0x01, 0x00, 0x01 };
+	struct {
+		struct T6_keyBlock_hdr t6_hdr;
+		struct cca_token_hdr token;
+		struct cca_pvt_ext_CRT_sec pvt;
+		char key_parts[0];
+	} __attribute__((packed)) *key = p;
+	struct cca_public_sec *pub;
+	int short_len, long_len, pad_len, key_len, size;
+
+	memset(key, 0, sizeof(*key));
+
+	short_len = crt->inputdatalength / 2;
+	long_len = short_len + 8;
+	pad_len = -(3*long_len + 2*short_len) & 7;
+	key_len = 3*long_len + 2*short_len + pad_len + crt->inputdatalength;
+	size = sizeof(*key) + key_len + sizeof(*pub) + 3;
+
+	/* parameter block.key block */
+	if (big_endian) {
+		key->t6_hdr.blen = cpu_to_be16(size);
+		key->t6_hdr.ulen = cpu_to_be16(size - 2);
+	} else {
+		key->t6_hdr.blen = cpu_to_le16(size);
+		key->t6_hdr.ulen = cpu_to_le16(size - 2);
+	}
+
+	/* key token header */
+	key->token.token_identifier = CCA_TKN_HDR_ID_EXT;
+	key->token.token_length = size - 6;
+
+	/* private section */
+	key->pvt.section_identifier = CCA_PVT_EXT_CRT_SEC_ID_PVT;
+	key->pvt.section_length = sizeof(key->pvt) + key_len;
+	key->pvt.key_format = CCA_PVT_EXT_CRT_SEC_FMT_CL;
+	key->pvt.key_use_flags[0] = CCA_PVT_USAGE_ALL;
+	key->pvt.p_len = key->pvt.dp_len = key->pvt.u_len = long_len;
+	key->pvt.q_len = key->pvt.dq_len = short_len;
+	key->pvt.mod_len = crt->inputdatalength;
+	key->pvt.pad_len = pad_len;
+
+	/* key parts */
+	if (copy_from_user(key->key_parts, crt->np_prime, long_len) ||
+	    copy_from_user(key->key_parts + long_len,
+					crt->nq_prime, short_len) ||
+	    copy_from_user(key->key_parts + long_len + short_len,
+					crt->bp_key, long_len) ||
+	    copy_from_user(key->key_parts + 2*long_len + short_len,
+					crt->bq_key, short_len) ||
+	    copy_from_user(key->key_parts + 2*long_len + 2*short_len,
+					crt->u_mult_inv, long_len))
+		return -EFAULT;
+	memset(key->key_parts + 3*long_len + 2*short_len + pad_len,
+	       0xff, crt->inputdatalength);
+	pub = (struct cca_public_sec *)(key->key_parts + key_len);
+	*pub = static_cca_pub_sec;
+	pub->modulus_bit_len = 8 * crt->inputdatalength;
+	/**
+	 * In a private key, the modulus doesn't appear in the public
+	 * section. So, an arbitrary public exponent of 0x010001 will be
+	 * used.
+	 */
+	memcpy((char *) (pub + 1), pk_exponent, 3);
+	return size;
+}
+
+#endif /* _ZCRYPT_CCA_KEY_H_ */