OpenSolaris_b135/lib/pkcs11/pkcs11_tpm/common/mech_md5.c
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*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include "tpmtok_int.h"
CK_RV
md5_hash(SESSION *sess,
CK_BBOOL length_only,
DIGEST_CONTEXT *ctx,
CK_BYTE *in_data,
CK_ULONG in_data_len,
CK_BYTE *out_data,
CK_ULONG *out_data_len)
{
if (! sess || ! ctx || ! out_data_len) {
return (CKR_FUNCTION_FAILED);
}
*out_data_len = MD5_DIGEST_LENGTH;
if (length_only == TRUE) {
return (CKR_OK);
}
MD5Update(ctx->context.md5ctx, in_data, in_data_len);
MD5Final(out_data, ctx->context.md5ctx);
return (CKR_OK);
}
CK_RV
md5_hmac_sign(SESSION * sess,
CK_BBOOL length_only,
SIGN_VERIFY_CONTEXT * ctx,
CK_BYTE * in_data,
CK_ULONG in_data_len,
CK_BYTE * out_data,
CK_ULONG * out_data_len)
{
OBJECT * key_obj = NULL;
CK_ATTRIBUTE * attr = NULL;
CK_BYTE hash[MD5_DIGEST_LENGTH];
DIGEST_CONTEXT digest_ctx;
CK_MECHANISM digest_mech;
CK_BYTE k_ipad[MD5_BLOCK_SIZE];
CK_BYTE k_opad[MD5_BLOCK_SIZE];
CK_ULONG key_bytes, hash_len, hmac_len;
CK_ULONG i;
CK_RV rc;
if (! sess || ! ctx || ! out_data_len) {
return (CKR_FUNCTION_FAILED);
}
if (ctx->mech.mechanism == CKM_MD5_HMAC_GENERAL) {
hmac_len = *(CK_ULONG *)ctx->mech.pParameter;
if (hmac_len == 0) {
*out_data_len = 0;
return (CKR_OK);
}
}
else
hmac_len = MD5_DIGEST_LENGTH;
*out_data_len = hmac_len;
if (length_only == TRUE) {
return (CKR_OK);
}
(void) memset(&digest_ctx, 0x0, sizeof (DIGEST_CONTEXT));
rc = object_mgr_find_in_map1(sess->hContext, ctx->key, &key_obj);
if (rc != CKR_OK)
return (rc);
rc = template_attribute_find(key_obj->template, CKA_VALUE, &attr);
if (rc == FALSE) {
return (CKR_FUNCTION_FAILED);
}
else
key_bytes = attr->ulValueLen;
// build (K XOR ipad), (K XOR opad)
//
if (key_bytes > MD5_BLOCK_SIZE) {
digest_mech.mechanism = CKM_MD5;
digest_mech.ulParameterLen = 0;
digest_mech.pParameter = NULL;
rc = digest_mgr_init(sess, &digest_ctx, &digest_mech);
if (rc != CKR_OK) {
(void) digest_mgr_cleanup(&digest_ctx);
return (rc);
}
hash_len = *out_data_len;
rc = digest_mgr_digest(sess, FALSE, &digest_ctx,
attr->pValue, attr->ulValueLen,
hash, &hash_len);
if (rc != CKR_OK) {
(void) digest_mgr_cleanup(&digest_ctx);
return (rc);
}
(void) digest_mgr_cleanup(&digest_ctx);
(void) memset(&digest_ctx, 0x0, sizeof (DIGEST_CONTEXT));
for (i = 0; i < hash_len; i++) {
k_ipad[i] = hash[i] ^ 0x36;
k_opad[i] = hash[i] ^ 0x5C;
}
(void) memset(&k_ipad[i], 0x36, MD5_BLOCK_SIZE - i);
(void) memset(&k_opad[i], 0x5C, MD5_BLOCK_SIZE - i);
} else {
CK_BYTE *key = attr->pValue;
for (i = 0; i < key_bytes; i++) {
k_ipad[i] = key[i] ^ 0x36;
k_opad[i] = key[i] ^ 0x5C;
}
(void) memset(&k_ipad[i], 0x36, MD5_BLOCK_SIZE - key_bytes);
(void) memset(&k_opad[i], 0x5C, MD5_BLOCK_SIZE - key_bytes);
}
digest_mech.mechanism = CKM_MD5;
digest_mech.ulParameterLen = 0;
digest_mech.pParameter = NULL;
rc = digest_mgr_init(sess, &digest_ctx, &digest_mech);
if (rc != CKR_OK) {
(void) digest_mgr_cleanup(&digest_ctx);
return (rc);
}
rc = digest_mgr_digest_update(sess, &digest_ctx,
k_ipad, MD5_BLOCK_SIZE);
if (rc != CKR_OK) {
(void) digest_mgr_cleanup(&digest_ctx);
return (rc);
}
rc = digest_mgr_digest_update(sess, &digest_ctx,
in_data, in_data_len);
if (rc != CKR_OK) {
(void) digest_mgr_cleanup(&digest_ctx);
return (rc);
}
hash_len = sizeof (hash);
rc = digest_mgr_digest_final(sess, &digest_ctx, hash, &hash_len);
if (rc != CKR_OK) {
(void) digest_mgr_cleanup(&digest_ctx);
return (rc);
}
(void) digest_mgr_cleanup(&digest_ctx);
(void) memset(&digest_ctx, 0x0, sizeof (DIGEST_CONTEXT));
rc = digest_mgr_init(sess, &digest_ctx, &digest_mech);
if (rc != CKR_OK) {
(void) digest_mgr_cleanup(&digest_ctx);
return (rc);
}
rc = digest_mgr_digest_update(sess, &digest_ctx,
k_opad, MD5_BLOCK_SIZE);
if (rc != CKR_OK) {
(void) digest_mgr_cleanup(&digest_ctx);
return (rc);
}
rc = digest_mgr_digest_update(sess, &digest_ctx, hash, hash_len);
if (rc != CKR_OK) {
(void) digest_mgr_cleanup(&digest_ctx);
return (rc);
}
hash_len = sizeof (hash);
rc = digest_mgr_digest_final(sess, &digest_ctx, hash, &hash_len);
if (rc != CKR_OK) {
(void) digest_mgr_cleanup(&digest_ctx);
return (rc);
}
(void) memcpy(out_data, hash, hmac_len);
*out_data_len = hmac_len;
(void) digest_mgr_cleanup(&digest_ctx);
return (CKR_OK);
}
CK_RV
md5_hmac_verify(SESSION * sess,
SIGN_VERIFY_CONTEXT * ctx,
CK_BYTE * in_data,
CK_ULONG in_data_len,
CK_BYTE * signature,
CK_ULONG sig_len)
{
CK_BYTE hmac[MD5_DIGEST_LENGTH];
SIGN_VERIFY_CONTEXT hmac_ctx;
CK_ULONG hmac_len, len;
CK_RV rc;
if (! sess || ! ctx || ! in_data || ! signature) {
return (CKR_FUNCTION_FAILED);
}
if (ctx->mech.mechanism == CKM_MD5_HMAC_GENERAL)
hmac_len = *(CK_ULONG *)ctx->mech.pParameter;
else
hmac_len = MD5_DIGEST_LENGTH;
(void) memset(&hmac_ctx, 0, sizeof (SIGN_VERIFY_CONTEXT));
rc = sign_mgr_init(sess, &hmac_ctx, &ctx->mech, FALSE, ctx->key);
if (rc != CKR_OK) {
(void) sign_mgr_cleanup(&hmac_ctx);
return (rc);
}
len = sizeof (hmac);
rc = sign_mgr_sign(sess, FALSE, &hmac_ctx,
in_data, in_data_len, hmac, &len);
if (rc != CKR_OK) {
(void) sign_mgr_cleanup(&hmac_ctx);
return (rc);
}
if ((len != hmac_len) || (len != sig_len)) {
return (CKR_SIGNATURE_LEN_RANGE);
}
if (memcmp(hmac, signature, hmac_len) != 0) {
rc = CKR_SIGNATURE_INVALID;
}
(void) sign_mgr_cleanup(&hmac_ctx);
return (rc);
}