Merge branch 'pk-transparent-hash'

Conflicts:
	ncr-int.h

5 files changed, 318 insertions, 14 deletions

diff --git a/examples/pk.c b/examples/pk.c
index 81c5b49..5ccb73e 100644
--- a/examples/pk.c
+++ b/examples/pk.c
@@ -29,6 +29,7 @@
 #define ALIGN_NL __attribute__((aligned(NLA_ALIGNTO)))
 
 #define SIGNATURE_HASH "sha1"
+#define SIGNATURE_HASH_SIZE 20
 
 #define ALG_AES_CBC "cbc(aes)"
 #define ALG_DH "dh"
@@ -1035,6 +1036,126 @@ static int rsa_key_sign_verify(int cfd, ncr_key_t privkey, ncr_key_t pubkey, int
 
 }
 
+static int rsa_key_sign_verify_transparent(int cfd, ncr_key_t privkey,
+					   ncr_key_t pubkey, int pss)
+{
+	struct __attribute__((packed)) {
+		struct ncr_session_once f;
+		struct nlattr algo_head ALIGN_NL;
+		char algo[sizeof(NCR_ALG_RSA_TRANSPARENT_HASH)] ALIGN_NL;
+		struct nlattr key_head ALIGN_NL;
+		uint32_t key ALIGN_NL;
+		struct nlattr rsa_head ALIGN_NL;
+		uint32_t rsa ALIGN_NL;
+		struct nlattr sign_hash_head ALIGN_NL;
+		char sign_hash[sizeof(SIGNATURE_HASH)] ALIGN_NL;
+		struct nlattr input_head ALIGN_NL;
+		struct ncr_session_input_data input ALIGN_NL;
+		struct nlattr signature_head ALIGN_NL;
+		struct ncr_session_output_buffer signature ALIGN_NL;
+	} ksign;
+	struct __attribute__((packed)) {
+		struct ncr_session_once f;
+		struct nlattr algo_head ALIGN_NL;
+		char algo[sizeof(NCR_ALG_RSA_TRANSPARENT_HASH)] ALIGN_NL;
+		struct nlattr key_head ALIGN_NL;
+		uint32_t key ALIGN_NL;
+		struct nlattr rsa_head ALIGN_NL;
+		uint32_t rsa ALIGN_NL;
+		struct nlattr sign_hash_head ALIGN_NL;
+		char sign_hash[sizeof(SIGNATURE_HASH)] ALIGN_NL;
+		struct nlattr input_head ALIGN_NL;
+		struct ncr_session_input_data input ALIGN_NL;
+		struct nlattr signature_head ALIGN_NL;
+		struct ncr_session_input_data signature ALIGN_NL;
+	} kverify;
+	uint8_t data[SIGNATURE_HASH_SIZE];
+	uint8_t sig[DATA_SIZE];
+	size_t sig_size;
+	int ret;
+
+	fprintf(stdout, "Tests on transparent RSA (%s) key signature:",
+		(pss != 0) ? "PSS" : "PKCS V1.5");
+	fflush(stdout);
+
+	memset(data, 0x3, sizeof(data));
+
+	/* sign data */
+	memset(&ksign.f, 0, sizeof(ksign.f));
+	ksign.f.input_size = sizeof(ksign);
+	ksign.f.op = NCR_OP_SIGN;
+	ksign.algo_head.nla_len = NLA_HDRLEN + sizeof(ksign.algo);
+	ksign.algo_head.nla_type = NCR_ATTR_ALGORITHM;
+	strcpy(ksign.algo, NCR_ALG_RSA_TRANSPARENT_HASH);
+	ksign.key_head.nla_len = NLA_HDRLEN + sizeof(ksign.key);
+	ksign.key_head.nla_type = NCR_ATTR_KEY;
+	ksign.key = privkey;
+	ksign.rsa_head.nla_len = NLA_HDRLEN + sizeof(ksign.rsa);
+	ksign.rsa_head.nla_type = NCR_ATTR_RSA_ENCODING_METHOD;
+	ksign.rsa = (pss != 0) ? RSA_PKCS1_PSS : RSA_PKCS1_V1_5;
+	ksign.sign_hash_head.nla_len = NLA_HDRLEN + sizeof(ksign.sign_hash);
+	ksign.sign_hash_head.nla_type = NCR_ATTR_SIGNATURE_HASH_ALGORITHM;
+	strcpy(ksign.sign_hash, SIGNATURE_HASH);
+	ksign.input_head.nla_len = NLA_HDRLEN + sizeof(ksign.input);
+	ksign.input_head.nla_type = NCR_ATTR_UPDATE_INPUT_DATA;
+	ksign.input.data = data;
+	ksign.input.data_size = SIGNATURE_HASH_SIZE;
+	ksign.signature_head.nla_len = NLA_HDRLEN + sizeof(ksign.signature);
+	ksign.signature_head.nla_type = NCR_ATTR_FINAL_OUTPUT_BUFFER;
+	ksign.signature.buffer = sig;
+	ksign.signature.buffer_size = sizeof(sig);
+	ksign.signature.result_size_ptr = &sig_size;
+
+	if (ioctl(cfd, NCRIO_SESSION_ONCE, &ksign)) {
+		fprintf(stderr, "Error: %s:%d\n", __func__, __LINE__);
+		perror("ioctl(NCRIO_SESSION_ONCE)");
+		return 1;
+	}
+
+	/* verify signature */
+	memset(data, 0x3, sizeof(data));
+
+	memset(&kverify.f, 0, sizeof(kverify.f));
+	kverify.f.input_size = sizeof(kverify);
+	kverify.f.op = NCR_OP_VERIFY;
+	kverify.algo_head.nla_len = NLA_HDRLEN + sizeof(kverify.algo);
+	kverify.algo_head.nla_type = NCR_ATTR_ALGORITHM;
+	strcpy(kverify.algo, NCR_ALG_RSA_TRANSPARENT_HASH);
+	kverify.key_head.nla_len = NLA_HDRLEN + sizeof(kverify.key);
+	kverify.key_head.nla_type = NCR_ATTR_KEY;
+	kverify.key = pubkey;
+	kverify.rsa_head.nla_len = NLA_HDRLEN + sizeof(kverify.rsa);
+	kverify.rsa_head.nla_type = NCR_ATTR_RSA_ENCODING_METHOD;
+	kverify.rsa = (pss != 0) ? RSA_PKCS1_PSS : RSA_PKCS1_V1_5;
+	kverify.sign_hash_head.nla_len = NLA_HDRLEN + sizeof(kverify.sign_hash);
+	kverify.sign_hash_head.nla_type = NCR_ATTR_SIGNATURE_HASH_ALGORITHM;
+	strcpy(kverify.sign_hash, SIGNATURE_HASH);
+	kverify.input_head.nla_len = NLA_HDRLEN + sizeof(kverify.input);
+	kverify.input_head.nla_type = NCR_ATTR_UPDATE_INPUT_DATA;
+	kverify.input.data = data;
+	kverify.input.data_size = SIGNATURE_HASH_SIZE;
+	kverify.signature_head.nla_len = NLA_HDRLEN + sizeof(kverify.signature);
+	kverify.signature_head.nla_type = NCR_ATTR_FINAL_INPUT_DATA;
+	kverify.signature.data = sig;
+	kverify.signature.data_size = sig_size;
+
+	ret = ioctl(cfd, NCRIO_SESSION_ONCE, &kverify);
+	if (ret < 0) {
+		fprintf(stderr, "Error: %s:%d\n", __func__, __LINE__);
+		perror("ioctl(NCRIO_SESSION_ONCE)");
+		return 1;
+	}
+
+	if (ret)
+		fprintf(stdout, " Success\n");
+	else {
+		fprintf(stdout, " Verification Failed!\n");
+		return 1;
+	}
+
+	return 0;
+}
+
 static int dsa_key_sign_verify(int cfd, ncr_key_t privkey, ncr_key_t pubkey)
 {
 	struct __attribute__((packed)) {
@@ -1142,6 +1263,112 @@ static int dsa_key_sign_verify(int cfd, ncr_key_t privkey, ncr_key_t pubkey)
 
 }
 
+static int dsa_key_sign_verify_transparent(int cfd, ncr_key_t privkey,
+					   ncr_key_t pubkey)
+{
+	struct __attribute__((packed)) {
+		struct ncr_session_once f;
+		struct nlattr algo_head ALIGN_NL;
+		char algo[sizeof(NCR_ALG_DSA_TRANSPARENT_HASH)] ALIGN_NL;
+		struct nlattr key_head ALIGN_NL;
+		uint32_t key ALIGN_NL;
+		struct nlattr sign_hash_head ALIGN_NL;
+		char sign_hash[sizeof(SIGNATURE_HASH)] ALIGN_NL;
+		struct nlattr input_head ALIGN_NL;
+		struct ncr_session_input_data input ALIGN_NL;
+		struct nlattr signature_head ALIGN_NL;
+		struct ncr_session_output_buffer signature ALIGN_NL;
+	} ksign;
+	struct __attribute__((packed)) {
+		struct ncr_session_once f;
+		struct nlattr algo_head ALIGN_NL;
+		char algo[sizeof(NCR_ALG_DSA_TRANSPARENT_HASH)] ALIGN_NL;
+		struct nlattr key_head ALIGN_NL;
+		uint32_t key ALIGN_NL;
+		struct nlattr sign_hash_head ALIGN_NL;
+		char sign_hash[sizeof(SIGNATURE_HASH)] ALIGN_NL;
+		struct nlattr input_head ALIGN_NL;
+		struct ncr_session_input_data input ALIGN_NL;
+		struct nlattr signature_head ALIGN_NL;
+		struct ncr_session_input_data signature ALIGN_NL;
+	} kverify;
+	uint8_t data[SIGNATURE_HASH_SIZE];
+	uint8_t sig[DATA_SIZE];
+	size_t sig_size;
+	int ret;
+
+	fprintf(stdout, "Tests on transparent DSA key signature:");
+	fflush(stdout);
+
+	memset(data, 0x3, sizeof(data));
+
+	/* sign data */
+	memset(&ksign.f, 0, sizeof(ksign.f));
+	ksign.f.input_size = sizeof(ksign);
+	ksign.f.op = NCR_OP_SIGN;
+	ksign.algo_head.nla_len = NLA_HDRLEN + sizeof(ksign.algo);
+	ksign.algo_head.nla_type = NCR_ATTR_ALGORITHM;
+	strcpy(ksign.algo, NCR_ALG_DSA_TRANSPARENT_HASH);
+	ksign.key_head.nla_len = NLA_HDRLEN + sizeof(ksign.key);
+	ksign.key_head.nla_type = NCR_ATTR_KEY;
+	ksign.key = privkey;
+	ksign.sign_hash_head.nla_len = NLA_HDRLEN + sizeof(ksign.sign_hash);
+	ksign.sign_hash_head.nla_type = NCR_ATTR_SIGNATURE_HASH_ALGORITHM;
+	strcpy(ksign.sign_hash, SIGNATURE_HASH);
+	ksign.input_head.nla_len = NLA_HDRLEN + sizeof(ksign.input);
+	ksign.input_head.nla_type = NCR_ATTR_UPDATE_INPUT_DATA;
+	ksign.input.data = data;
+	ksign.input.data_size = SIGNATURE_HASH_SIZE;
+	ksign.signature_head.nla_len = NLA_HDRLEN + sizeof(ksign.signature);
+	ksign.signature_head.nla_type = NCR_ATTR_FINAL_OUTPUT_BUFFER;
+	ksign.signature.buffer = sig;
+	ksign.signature.buffer_size = sizeof(sig);
+	ksign.signature.result_size_ptr = &sig_size;
+
+	if (ioctl(cfd, NCRIO_SESSION_ONCE, &ksign)) {
+		fprintf(stderr, "Error: %s:%d\n", __func__, __LINE__);
+		perror("ioctl(NCRIO_SESSION_ONCE)");
+		return 1;
+	}
+
+	/* verify signature */
+	memset(&kverify.f, 0, sizeof(kverify.f));
+	kverify.f.input_size = sizeof(kverify);
+	kverify.f.op = NCR_OP_VERIFY;
+	kverify.algo_head.nla_len = NLA_HDRLEN + sizeof(kverify.algo);
+	kverify.algo_head.nla_type = NCR_ATTR_ALGORITHM;
+	strcpy(kverify.algo, NCR_ALG_DSA_TRANSPARENT_HASH);
+	kverify.key_head.nla_len = NLA_HDRLEN + sizeof(kverify.key);
+	kverify.key_head.nla_type = NCR_ATTR_KEY;
+	kverify.key = pubkey;
+	kverify.sign_hash_head.nla_len = NLA_HDRLEN + sizeof(kverify.sign_hash);
+	kverify.sign_hash_head.nla_type = NCR_ATTR_SIGNATURE_HASH_ALGORITHM;
+	strcpy(kverify.sign_hash, SIGNATURE_HASH);
+	kverify.input_head.nla_len = NLA_HDRLEN + sizeof(kverify.input);
+	kverify.input_head.nla_type = NCR_ATTR_UPDATE_INPUT_DATA;
+	kverify.input.data = data;
+	kverify.input.data_size = SIGNATURE_HASH_SIZE;
+	kverify.signature_head.nla_len = NLA_HDRLEN + sizeof(kverify.signature);
+	kverify.signature_head.nla_type = NCR_ATTR_FINAL_INPUT_DATA;
+	kverify.signature.data = sig;
+	kverify.signature.data_size = sizeof(sig);
+
+	ret = ioctl(cfd, NCRIO_SESSION_ONCE, &kverify);
+	if (ret < 0) {
+		fprintf(stderr, "Error: %s:%d\n", __func__, __LINE__);
+		perror("ioctl(NCRIO_SESSION_ONCE)");
+		return 1;
+	}
+
+	if (ret)
+		fprintf(stdout, " Success\n");
+	else {
+		fprintf(stdout, " Verification Failed!\n");
+		return 1;
+	}
+
+	return 0;
+}
 
 static int test_ncr_rsa(int cfd)
 {
@@ -1253,6 +1480,18 @@ static int test_ncr_rsa(int cfd)
 		return 1;
 	}
 
+	ret = rsa_key_sign_verify_transparent(cfd, privkey, pubkey, 1);
+	if (ret != 0) {
+		fprintf(stderr, "Error: %s:%d\n", __func__, __LINE__);
+		return 1;
+	}
+
+	ret = rsa_key_sign_verify_transparent(cfd, privkey, pubkey, 0);
+	if (ret != 0) {
+		fprintf(stderr, "Error: %s:%d\n", __func__, __LINE__);
+		return 1;
+	}
+
 	ret = rsa_key_encrypt(cfd, privkey, pubkey, 0);
 	if (ret != 0) {
 		fprintf(stderr, "Error: %s:%d\n", __func__, __LINE__);
@@ -1377,6 +1616,12 @@ static int test_ncr_dsa(int cfd)
 		return 1;
 	}
 
+	ret = dsa_key_sign_verify_transparent(cfd, privkey, pubkey);
+	if (ret != 0) {
+		fprintf(stderr, "Error: %s:%d\n", __func__, __LINE__);
+		return 1;
+	}
+
 	return 0;
 
 }
diff --git a/ncr-int.h b/ncr-int.h
index a6b3739..87964b0 100644
--- a/ncr-int.h
+++ b/ncr-int.h
@@ -18,7 +18,8 @@
 struct nlattr;
 struct ncr_out;
 
-// Not all known algorithms - only for quick internal identification
+// Not all known algorithms - only for quick internal identification.  Note
+// that more than one struct algo_properties_st may share the same enum value!
 enum ncr_algorithm {
 	NCR_ALG_NONE__,
 	NCR_ALG_NULL,
@@ -49,6 +50,7 @@ struct algo_properties_st {
 	unsigned can_kx:1; /* key exchange */
 	unsigned is_symmetric:1;
 	unsigned is_pk:1;
+	unsigned has_transparent_hash:1;
 	int digest_size;
 	/* NCR_KEY_TYPE_SECRET if for a secret key algorithm or MAC,
 	 * NCR_KEY_TYPE_PUBLIC for a public key algorithm.
diff --git a/ncr-pk.c b/ncr-pk.c
index c6055db..9b9078e 100644
--- a/ncr-pk.c
+++ b/ncr-pk.c
@@ -358,7 +358,9 @@ int ncr_pk_cipher_init(const struct algo_properties_st *algo,
 
 	memset(ctx, 0, sizeof(*ctx));
 	
-	if (key->algorithm != algo) {
+	/* Allow using the same key for transparent and non-transparent
+	   hashing. */
+	if (key->algorithm->algo != algo->algo) {
 		err();
 		return -EINVAL;
 	}
diff --git a/ncr-sessions.c b/ncr-sessions.c
index 3691127..c65db2f 100644
--- a/ncr-sessions.c
+++ b/ncr-sessions.c
@@ -49,6 +49,11 @@ struct session_item_st {
 	struct cipher_data cipher;
 	struct ncr_pk_ctx pk;
 	struct hash_data hash;
+	/* This is a hack, ideally we'd have a hash algorithm that simply
+	   outputs its input as a digest.  We'd still need to distinguish
+	   between the hash to identify in the signature and the hash to
+	   actually use, though. */
+	void *transparent_hash;
 
 	struct scatterlist *sg;
 	struct page **pages;
@@ -165,6 +170,7 @@ static void _ncr_sessions_item_put(struct session_item_st *item)
 		cryptodev_cipher_deinit(&item->cipher);
 		ncr_pk_cipher_deinit(&item->pk);
 		cryptodev_hash_deinit(&item->hash);
+		kfree(item->transparent_hash);
 		if (item->key)
 			_ncr_key_item_put(item->key);
 		kfree(item->sg);
@@ -272,8 +278,14 @@ static const struct algo_properties_st algo_properties[] = {
 	   (yet). */
 	{ .algo = NCR_ALG_RSA, KSTR("rsa"), .is_pk = 1,
 		.can_encrypt=1, .can_sign=1, .key_type = NCR_KEY_TYPE_PUBLIC },
+	{ .algo = NCR_ALG_RSA, KSTR(NCR_ALG_RSA_TRANSPARENT_HASH), .is_pk = 1,
+	  .can_encrypt=1, .can_sign=1, .has_transparent_hash = 1,
+	  .key_type = NCR_KEY_TYPE_PUBLIC },
 	{ .algo = NCR_ALG_DSA, KSTR("dsa"), .is_pk = 1,
 		.can_sign=1, .key_type = NCR_KEY_TYPE_PUBLIC },
+	{ .algo = NCR_ALG_DSA, KSTR(NCR_ALG_DSA_TRANSPARENT_HASH), .is_pk = 1,
+	  .can_sign=1, .has_transparent_hash = 1,
+	  .key_type = NCR_KEY_TYPE_PUBLIC },
 	{ .algo = NCR_ALG_DH, KSTR("dh"), .is_pk = 1,
 		.can_kx=1, .key_type = NCR_KEY_TYPE_PUBLIC },
 #undef KSTR
@@ -578,6 +590,15 @@ static struct session_item_st *_ncr_session_init(struct ncr_lists *lists,
 						err();
 						goto fail;
 					}
+
+					if (ns->algorithm->has_transparent_hash) {
+						ns->transparent_hash = kzalloc(ns->hash.digestsize, GFP_KERNEL);
+						if (ns->transparent_hash == NULL) {
+							err();
+							ret = -ENOMEM;
+							goto fail;
+						}
+					}
 				} else {
 					err();
 					ret = -EINVAL;
@@ -910,10 +931,27 @@ static int _ncr_session_update(struct session_item_st *sess,
 
 		case NCR_OP_SIGN:
 		case NCR_OP_VERIFY:
-			ret = cryptodev_hash_update(&sess->hash, isg, isg_size);
-			if (ret < 0) {
-				err();
-				goto fail;
+			if (sess->algorithm->has_transparent_hash) {
+				if (isg_size != sess->hash.digestsize) {
+					err();
+					ret = -EINVAL;
+					goto fail;
+				}
+				ret = sg_copy_to_buffer(isg, isg_cnt,
+							sess->transparent_hash,
+							isg_size);
+				if (ret != isg_size) {
+					err();
+					ret = -EINVAL;
+					goto fail;
+				}
+			} else {
+				ret = cryptodev_hash_update(&sess->hash, isg,
+							    isg_size);
+				if (ret < 0) {
+					err();
+					goto fail;
+				}
 			}
 			break;
 		default:
@@ -997,10 +1035,14 @@ static int _ncr_session_final(struct ncr_lists *lists,
 			ret = -EINVAL;
 			goto fail;
 		}
-		ret = cryptodev_hash_final(&sess->hash, digest);
-		if (ret < 0) {
-			err();
-			goto fail;
+		if (sess->algorithm->has_transparent_hash)
+			memcpy(digest, sess->transparent_hash, digest_size);
+		else {
+			ret = cryptodev_hash_final(&sess->hash, digest);
+			if (ret < 0) {
+				err();
+				goto fail;
+			}
 		}
 
 		if (!sess->algorithm->is_pk)
@@ -1036,10 +1078,14 @@ static int _ncr_session_final(struct ncr_lists *lists,
 			goto fail;
 		}
 
-		ret = cryptodev_hash_final(&sess->hash, digest);
-		if (ret < 0) {
-			err();
-			goto fail;
+		if (sess->algorithm->has_transparent_hash)
+			memcpy(digest, sess->transparent_hash, digest_size);
+		else {
+			ret = cryptodev_hash_final(&sess->hash, digest);
+			if (ret < 0) {
+				err();
+				goto fail;
+			}
 		}
 
 		cryptodev_hash_deinit(&sess->hash);
@@ -1130,6 +1176,11 @@ static int _ncr_session_update_key(struct ncr_lists *lists,
 			goto fail;
 		case NCR_OP_SIGN:
 		case NCR_OP_VERIFY:
+			if (sess->algorithm->has_transparent_hash) {
+				err();
+				ret = -EINVAL;
+				goto fail;
+			}
 			ret = _cryptodev_hash_update(&sess->hash, 
 				key->key.secret.data, key->key.secret.size);
 			if (ret < 0) {
diff --git a/ncr.h b/ncr.h
index c248c6c..ce84f7a 100644
--- a/ncr.h
+++ b/ncr.h
@@ -69,6 +69,10 @@ enum {
 #define NCR_CIPHER_MAX_BLOCK_LEN 32
 #define NCR_HASH_MAX_OUTPUT_SIZE  64
 
+/* Better names wanted */
+#define NCR_ALG_DSA_TRANSPARENT_HASH "__dsa_transparent_hash"
+#define NCR_ALG_RSA_TRANSPARENT_HASH "__rsa_transparent_hash"
+
 #define NCR_WALG_AES_RFC3394 "walg-aes-rfc3394" /* for secret keys only */
 #define NCR_WALG_AES_RFC5649 "walg-aes-rfc5649" /* can wrap arbitrary key */