| /* crypto/evp/bio_md.c */ |
| /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| * All rights reserved. |
| * |
| * This package is an SSL implementation written |
| * by Eric Young (eay@cryptsoft.com). |
| * The implementation was written so as to conform with Netscapes SSL. |
| * |
| * This library is free for commercial and non-commercial use as long as |
| * the following conditions are aheared to. The following conditions |
| * apply to all code found in this distribution, be it the RC4, RSA, |
| * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| * included with this distribution is covered by the same copyright terms |
| * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| * |
| * Copyright remains Eric Young's, and as such any Copyright notices in |
| * the code are not to be removed. |
| * If this package is used in a product, Eric Young should be given attribution |
| * as the author of the parts of the library used. |
| * This can be in the form of a textual message at program startup or |
| * in documentation (online or textual) provided with the package. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * "This product includes cryptographic software written by |
| * Eric Young (eay@cryptsoft.com)" |
| * The word 'cryptographic' can be left out if the rouines from the library |
| * being used are not cryptographic related :-). |
| * 4. If you include any Windows specific code (or a derivative thereof) from |
| * the apps directory (application code) you must include an acknowledgement: |
| * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| * |
| * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * The licence and distribution terms for any publically available version or |
| * derivative of this code cannot be changed. i.e. this code cannot simply be |
| * copied and put under another distribution licence |
| * [including the GNU Public Licence.] |
| */ |
| |
| #include <openssl/opensslconf.h> |
| #if !defined(OPENSSL_SYS_STARBOARD) |
| #include <errno.h> |
| #include <stdio.h> |
| #endif // !defined(OPENSSL_SYS_STARBOARD) |
| #include "cryptlib.h" |
| #include <openssl/buffer.h> |
| #include <openssl/evp.h> |
| |
| /* |
| * BIO_put and BIO_get both add to the digest, BIO_gets returns the digest |
| */ |
| |
| static int md_write(BIO *h, char const *buf, int num); |
| static int md_read(BIO *h, char *buf, int size); |
| /* |
| * static int md_puts(BIO *h, const char *str); |
| */ |
| static int md_gets(BIO *h, char *str, int size); |
| static long md_ctrl(BIO *h, int cmd, long arg1, void *arg2); |
| static int md_new(BIO *h); |
| static int md_free(BIO *data); |
| static long md_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp); |
| |
| static BIO_METHOD methods_md = { |
| BIO_TYPE_MD, "message digest", |
| md_write, |
| md_read, |
| NULL, /* md_puts, */ |
| md_gets, |
| md_ctrl, |
| md_new, |
| md_free, |
| md_callback_ctrl, |
| }; |
| |
| BIO_METHOD *BIO_f_md(void) |
| { |
| return (&methods_md); |
| } |
| |
| static int md_new(BIO *bi) |
| { |
| EVP_MD_CTX *ctx; |
| |
| ctx = EVP_MD_CTX_create(); |
| if (ctx == NULL) |
| return (0); |
| |
| bi->init = 0; |
| bi->ptr = (char *)ctx; |
| bi->flags = 0; |
| return (1); |
| } |
| |
| static int md_free(BIO *a) |
| { |
| if (a == NULL) |
| return (0); |
| EVP_MD_CTX_destroy(a->ptr); |
| a->ptr = NULL; |
| a->init = 0; |
| a->flags = 0; |
| return (1); |
| } |
| |
| static int md_read(BIO *b, char *out, int outl) |
| { |
| int ret = 0; |
| EVP_MD_CTX *ctx; |
| |
| if (out == NULL) |
| return (0); |
| ctx = b->ptr; |
| |
| if ((ctx == NULL) || (b->next_bio == NULL)) |
| return (0); |
| |
| ret = BIO_read(b->next_bio, out, outl); |
| if (b->init) { |
| if (ret > 0) { |
| if (EVP_DigestUpdate(ctx, (unsigned char *)out, |
| (unsigned int)ret) <= 0) |
| return (-1); |
| } |
| } |
| BIO_clear_retry_flags(b); |
| BIO_copy_next_retry(b); |
| return (ret); |
| } |
| |
| static int md_write(BIO *b, const char *in, int inl) |
| { |
| int ret = 0; |
| EVP_MD_CTX *ctx; |
| |
| if ((in == NULL) || (inl <= 0)) |
| return (0); |
| ctx = b->ptr; |
| |
| if ((ctx != NULL) && (b->next_bio != NULL)) |
| ret = BIO_write(b->next_bio, in, inl); |
| if (b->init) { |
| if (ret > 0) { |
| if (!EVP_DigestUpdate(ctx, (const unsigned char *)in, |
| (unsigned int)ret)) { |
| BIO_clear_retry_flags(b); |
| return 0; |
| } |
| } |
| } |
| if (b->next_bio != NULL) { |
| BIO_clear_retry_flags(b); |
| BIO_copy_next_retry(b); |
| } |
| return (ret); |
| } |
| |
| static long md_ctrl(BIO *b, int cmd, long num, void *ptr) |
| { |
| EVP_MD_CTX *ctx, *dctx, **pctx; |
| const EVP_MD **ppmd; |
| EVP_MD *md; |
| long ret = 1; |
| BIO *dbio; |
| |
| ctx = b->ptr; |
| |
| switch (cmd) { |
| case BIO_CTRL_RESET: |
| if (b->init) |
| ret = EVP_DigestInit_ex(ctx, ctx->digest, NULL); |
| else |
| ret = 0; |
| if (ret > 0) |
| ret = BIO_ctrl(b->next_bio, cmd, num, ptr); |
| break; |
| case BIO_C_GET_MD: |
| if (b->init) { |
| ppmd = ptr; |
| *ppmd = ctx->digest; |
| } else |
| ret = 0; |
| break; |
| case BIO_C_GET_MD_CTX: |
| pctx = ptr; |
| *pctx = ctx; |
| b->init = 1; |
| break; |
| case BIO_C_SET_MD_CTX: |
| if (b->init) |
| b->ptr = ptr; |
| else |
| ret = 0; |
| break; |
| case BIO_C_DO_STATE_MACHINE: |
| BIO_clear_retry_flags(b); |
| ret = BIO_ctrl(b->next_bio, cmd, num, ptr); |
| BIO_copy_next_retry(b); |
| break; |
| |
| case BIO_C_SET_MD: |
| md = ptr; |
| ret = EVP_DigestInit_ex(ctx, md, NULL); |
| if (ret > 0) |
| b->init = 1; |
| break; |
| case BIO_CTRL_DUP: |
| dbio = ptr; |
| dctx = dbio->ptr; |
| if (!EVP_MD_CTX_copy_ex(dctx, ctx)) |
| return 0; |
| b->init = 1; |
| break; |
| default: |
| ret = BIO_ctrl(b->next_bio, cmd, num, ptr); |
| break; |
| } |
| return (ret); |
| } |
| |
| static long md_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp) |
| { |
| long ret = 1; |
| |
| if (b->next_bio == NULL) |
| return (0); |
| switch (cmd) { |
| default: |
| ret = BIO_callback_ctrl(b->next_bio, cmd, fp); |
| break; |
| } |
| return (ret); |
| } |
| |
| static int md_gets(BIO *bp, char *buf, int size) |
| { |
| EVP_MD_CTX *ctx; |
| unsigned int ret; |
| |
| ctx = bp->ptr; |
| if (size < ctx->digest->md_size) |
| return (0); |
| if (EVP_DigestFinal_ex(ctx, (unsigned char *)buf, &ret) <= 0) |
| return -1; |
| |
| return ((int)ret); |
| } |
| |
| /*- |
| static int md_puts(bp,str) |
| BIO *bp; |
| char *str; |
| { |
| return(-1); |
| } |
| */ |