1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 #ifndef _KERNEL 29 #include <stdlib.h> 30 #endif 31 32 #include <sys/strsun.h> 33 #include <sys/types.h> 34 #include <modes/modes.h> 35 #include <sys/crypto/common.h> 36 #include <sys/crypto/impl.h> 37 38 /* 39 * Initialize by setting iov_or_mp to point to the current iovec or mp, 40 * and by setting current_offset to an offset within the current iovec or mp. 41 */ 42 void 43 crypto_init_ptrs(crypto_data_t *out, void **iov_or_mp, offset_t *current_offset) 44 { 45 offset_t offset; 46 47 switch (out->cd_format) { 48 case CRYPTO_DATA_RAW: 49 *current_offset = out->cd_offset; 50 break; 51 52 case CRYPTO_DATA_UIO: { 53 uio_t *uiop = out->cd_uio; 54 uintptr_t vec_idx; 55 56 offset = out->cd_offset; 57 for (vec_idx = 0; vec_idx < uiop->uio_iovcnt && 58 offset >= uiop->uio_iov[vec_idx].iov_len; 59 offset -= uiop->uio_iov[vec_idx++].iov_len) 60 ; 61 62 *current_offset = offset; 63 *iov_or_mp = (void *)vec_idx; 64 break; 65 } 66 67 case CRYPTO_DATA_MBLK: { 68 mblk_t *mp; 69 70 offset = out->cd_offset; 71 for (mp = out->cd_mp; mp != NULL && offset >= MBLKL(mp); 72 offset -= MBLKL(mp), mp = mp->b_cont) 73 ; 74 75 *current_offset = offset; 76 *iov_or_mp = mp; 77 break; 78 79 } 80 } /* end switch */ 81 } 82 83 /* 84 * Get pointers for where in the output to copy a block of encrypted or 85 * decrypted data. The iov_or_mp argument stores a pointer to the current 86 * iovec or mp, and offset stores an offset into the current iovec or mp. 87 */ 88 void 89 crypto_get_ptrs(crypto_data_t *out, void **iov_or_mp, offset_t *current_offset, 90 uint8_t **out_data_1, size_t *out_data_1_len, uint8_t **out_data_2, 91 size_t amt) 92 { 93 offset_t offset; 94 95 switch (out->cd_format) { 96 case CRYPTO_DATA_RAW: { 97 iovec_t *iov; 98 99 offset = *current_offset; 100 iov = &out->cd_raw; 101 if ((offset + amt) <= iov->iov_len) { 102 /* one block fits */ 103 *out_data_1 = (uint8_t *)iov->iov_base + offset; 104 *out_data_1_len = amt; 105 *out_data_2 = NULL; 106 *current_offset = offset + amt; 107 } 108 break; 109 } 110 111 case CRYPTO_DATA_UIO: { 112 uio_t *uio = out->cd_uio; 113 iovec_t *iov; 114 offset_t offset; 115 uintptr_t vec_idx; 116 uint8_t *p; 117 118 offset = *current_offset; 119 vec_idx = (uintptr_t)(*iov_or_mp); 120 iov = &uio->uio_iov[vec_idx]; 121 p = (uint8_t *)iov->iov_base + offset; 122 *out_data_1 = p; 123 124 if (offset + amt <= iov->iov_len) { 125 /* can fit one block into this iov */ 126 *out_data_1_len = amt; 127 *out_data_2 = NULL; 128 *current_offset = offset + amt; 129 } else { 130 /* one block spans two iovecs */ 131 *out_data_1_len = iov->iov_len - offset; 132 if (vec_idx == uio->uio_iovcnt) 133 return; 134 vec_idx++; 135 iov = &uio->uio_iov[vec_idx]; 136 *out_data_2 = (uint8_t *)iov->iov_base; 137 *current_offset = amt - *out_data_1_len; 138 } 139 *iov_or_mp = (void *)vec_idx; 140 break; 141 } 142 143 case CRYPTO_DATA_MBLK: { 144 mblk_t *mp; 145 uint8_t *p; 146 147 offset = *current_offset; 148 mp = (mblk_t *)*iov_or_mp; 149 p = mp->b_rptr + offset; 150 *out_data_1 = p; 151 if ((p + amt) <= mp->b_wptr) { 152 /* can fit one block into this mblk */ 153 *out_data_1_len = amt; 154 *out_data_2 = NULL; 155 *current_offset = offset + amt; 156 } else { 157 /* one block spans two mblks */ 158 *out_data_1_len = mp->b_wptr - p; 159 if ((mp = mp->b_cont) == NULL) 160 return; 161 *out_data_2 = mp->b_rptr; 162 *current_offset = (amt - *out_data_1_len); 163 } 164 *iov_or_mp = mp; 165 break; 166 } 167 } /* end switch */ 168 } 169 170 void 171 crypto_free_mode_ctx(void *ctx) 172 { 173 common_ctx_t *common_ctx = (common_ctx_t *)ctx; 174 175 if (common_ctx->cc_flags & ECB_MODE) 176 #ifdef _KERNEL 177 kmem_free(common_ctx, sizeof (ecb_ctx_t)); 178 #else 179 free(common_ctx); 180 #endif 181 else if (common_ctx->cc_flags & CBC_MODE) 182 #ifdef _KERNEL 183 kmem_free(common_ctx, sizeof (cbc_ctx_t)); 184 #else 185 free(common_ctx); 186 #endif 187 else if (common_ctx->cc_flags & CTR_MODE) 188 #ifdef _KERNEL 189 kmem_free(common_ctx, sizeof (ctr_ctx_t)); 190 #else 191 free(common_ctx); 192 #endif 193 else if (common_ctx->cc_flags & CCM_MODE) { 194 #ifdef _KERNEL 195 if (((ccm_ctx_t *)ctx)->ccm_pt_buf != NULL) 196 kmem_free(((ccm_ctx_t *)ctx)->ccm_pt_buf, 197 ((ccm_ctx_t *)ctx)->ccm_data_len); 198 199 kmem_free(ctx, sizeof (ccm_ctx_t)); 200 #else 201 if (((ccm_ctx_t *)ctx)->ccm_pt_buf != NULL) 202 free(((ccm_ctx_t *)ctx)->ccm_pt_buf); 203 free(ctx); 204 #endif 205 } 206 } 207