X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=crypto%2Fbio%2Fbss_mem.c;h=19a3bd88ba71bc960b957bf16ccb741105c36809;hb=cbfa5b03989ee6b8f5c13c4284d5bae02c562f20;hp=3b6f1734adb9226469fe658af5a653ce77955fc6;hpb=b0b6ba2d11ce4188e32be50c9e87672c67183616;p=oweals%2Fopenssl.git diff --git a/crypto/bio/bss_mem.c b/crypto/bio/bss_mem.c index 3b6f1734ad..19a3bd88ba 100644 --- a/crypto/bio/bss_mem.c +++ b/crypto/bio/bss_mem.c @@ -1,58 +1,10 @@ -/* 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. +/* + * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved. * - * 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.] + * Licensed under the Apache License 2.0 (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html */ #include @@ -68,36 +20,49 @@ static long mem_ctrl(BIO *h, int cmd, long arg1, void *arg2); static int mem_new(BIO *h); static int secmem_new(BIO *h); static int mem_free(BIO *data); -static int mem_buf_free(BIO *data, int free_all); +static int mem_buf_free(BIO *data); static int mem_buf_sync(BIO *h); static const BIO_METHOD mem_method = { BIO_TYPE_MEM, "memory buffer", + /* TODO: Convert to new style write function */ + bwrite_conv, mem_write, + /* TODO: Convert to new style read function */ + bread_conv, mem_read, mem_puts, mem_gets, mem_ctrl, mem_new, mem_free, - NULL, + NULL, /* mem_callback_ctrl */ }; static const BIO_METHOD secmem_method = { BIO_TYPE_MEM, "secure memory buffer", + /* TODO: Convert to new style write function */ + bwrite_conv, mem_write, + /* TODO: Convert to new style read function */ + bread_conv, mem_read, mem_puts, mem_gets, mem_ctrl, secmem_new, mem_free, - NULL, + NULL, /* mem_callback_ctrl */ }; -/* BIO memory stores buffer and read pointer */ +/* + * BIO memory stores buffer and read pointer + * however the roles are different for read only BIOs. + * In that case the readp just stores the original state + * to be used for reset. + */ typedef struct bio_buf_mem_st { struct buf_mem_st *buf; /* allocated buffer */ struct buf_mem_st *readp; /* read pointer */ @@ -110,7 +75,7 @@ typedef struct bio_buf_mem_st { const BIO_METHOD *BIO_s_mem(void) { - return (&mem_method); + return &mem_method; } const BIO_METHOD *BIO_s_secmem(void) @@ -140,7 +105,7 @@ BIO *BIO_new_mem_buf(const void *buf, int len) b->max = sz; *bb->readp = *bb->buf; ret->flags |= BIO_FLAGS_MEM_RDONLY; - /* Since this is static data retrying wont help */ + /* Since this is static data retrying won't help */ ret->num = 0; return ret; } @@ -170,42 +135,43 @@ static int mem_init(BIO *bi, unsigned long flags) static int mem_new(BIO *bi) { - return (mem_init(bi, 0L)); + return mem_init(bi, 0L); } static int secmem_new(BIO *bi) { - return (mem_init(bi, BUF_MEM_FLAG_SECURE)); + return mem_init(bi, BUF_MEM_FLAG_SECURE); } static int mem_free(BIO *a) { - return (mem_buf_free(a, 1)); + BIO_BUF_MEM *bb; + + if (a == NULL) + return 0; + + bb = (BIO_BUF_MEM *)a->ptr; + if (!mem_buf_free(a)) + return 0; + OPENSSL_free(bb->readp); + OPENSSL_free(bb); + return 1; } -static int mem_buf_free(BIO *a, int free_all) +static int mem_buf_free(BIO *a) { if (a == NULL) - return (0); - if (a->shutdown) { - if ((a->init) && (a->ptr != NULL)) { - BUF_MEM *b; - BIO_BUF_MEM *bb = (BIO_BUF_MEM *)a->ptr; - - if(bb != NULL) { - b = bb->buf; - if (a->flags & BIO_FLAGS_MEM_RDONLY) - b->data = NULL; - BUF_MEM_free(b); - if(free_all) { - OPENSSL_free(bb->readp); - OPENSSL_free(bb); - } - } - a->ptr = NULL; - } + return 0; + + if (a->shutdown && a->init && a->ptr != NULL) { + BIO_BUF_MEM *bb = (BIO_BUF_MEM *)a->ptr; + BUF_MEM *b = bb->buf; + + if (a->flags & BIO_FLAGS_MEM_RDONLY) + b->data = NULL; + BUF_MEM_free(b); } - return (1); + return 1; } /* @@ -213,16 +179,16 @@ static int mem_buf_free(BIO *a, int free_all) */ static int mem_buf_sync(BIO *b) { - if((b != NULL) && (b->init) && (b->ptr != NULL)) { + if (b != NULL && b->init != 0 && b->ptr != NULL) { BIO_BUF_MEM *bbm = (BIO_BUF_MEM *)b->ptr; - if(bbm->readp->data != bbm->buf->data) { + if (bbm->readp->data != bbm->buf->data) { memmove(bbm->buf->data, bbm->readp->data, bbm->readp->length); bbm->buf->length = bbm->readp->length; bbm->readp->data = bbm->buf->data; } } - return (0); + return 0; } static int mem_read(BIO *b, char *out, int outl) @@ -231,18 +197,21 @@ static int mem_read(BIO *b, char *out, int outl) BIO_BUF_MEM *bbm = (BIO_BUF_MEM *)b->ptr; BUF_MEM *bm = bbm->readp; + if (b->flags & BIO_FLAGS_MEM_RDONLY) + bm = bbm->buf; BIO_clear_retry_flags(b); ret = (outl >= 0 && (size_t)outl > bm->length) ? (int)bm->length : outl; if ((out != NULL) && (ret > 0)) { memcpy(out, bm->data, ret); bm->length -= ret; + bm->max -= ret; bm->data += ret; } else if (bm->length == 0) { ret = b->num; if (ret != 0) BIO_set_retry_read(b); } - return (ret); + return ret; } static int mem_write(BIO *b, const char *in, int inl) @@ -260,6 +229,8 @@ static int mem_write(BIO *b, const char *in, int inl) goto end; } BIO_clear_retry_flags(b); + if (inl == 0) + return 0; blen = bbm->readp->length; mem_buf_sync(b); if (BUF_MEM_grow_clean(bbm->buf, blen + inl) == 0) @@ -268,7 +239,7 @@ static int mem_write(BIO *b, const char *in, int inl) *bbm->readp = *bbm->buf; ret = inl; end: - return (ret); + return ret; } static long mem_ctrl(BIO *b, int cmd, long num, void *ptr) @@ -278,29 +249,34 @@ static long mem_ctrl(BIO *b, int cmd, long num, void *ptr) BIO_BUF_MEM *bbm = (BIO_BUF_MEM *)b->ptr; BUF_MEM *bm; + if (b->flags & BIO_FLAGS_MEM_RDONLY) + bm = bbm->buf; + else + bm = bbm->readp; + switch (cmd) { case BIO_CTRL_RESET: bm = bbm->buf; if (bm->data != NULL) { - /* For read only case reset to the start again */ - if ((b->flags & BIO_FLAGS_MEM_RDONLY) || (b->flags & BIO_FLAGS_NONCLEAR_RST)) { - bm->length = bm->max; + if (!(b->flags & BIO_FLAGS_MEM_RDONLY)) { + if (!(b->flags & BIO_FLAGS_NONCLEAR_RST)) { + memset(bm->data, 0, bm->max); + bm->length = 0; + } + *bbm->readp = *bbm->buf; } else { - memset(bm->data, 0, bm->max); - bm->length = 0; + /* For read only case just reset to the start again */ + *bbm->buf = *bbm->readp; } - *bbm->readp = *bbm->buf; } break; case BIO_CTRL_EOF: - bm = bbm->readp; ret = (long)(bm->length == 0); break; case BIO_C_SET_BUF_MEM_EOF_RETURN: b->num = (int)num; break; case BIO_CTRL_INFO: - bm = bbm->readp; ret = (long)bm->length; if (ptr != NULL) { pptr = (char **)ptr; @@ -308,16 +284,16 @@ static long mem_ctrl(BIO *b, int cmd, long num, void *ptr) } break; case BIO_C_SET_BUF_MEM: - mem_buf_free(b, 0); + mem_buf_free(b); b->shutdown = (int)num; bbm->buf = ptr; *bbm->readp = *bbm->buf; - b->ptr = bbm; break; case BIO_C_GET_BUF_MEM_PTR: if (ptr != NULL) { - mem_buf_sync(b); - bm = bbm->readp; + if (!(b->flags & BIO_FLAGS_MEM_RDONLY)) + mem_buf_sync(b); + bm = bbm->buf; pptr = (char **)ptr; *pptr = (char *)bm; } @@ -332,7 +308,6 @@ static long mem_ctrl(BIO *b, int cmd, long num, void *ptr) ret = 0L; break; case BIO_CTRL_PENDING: - bm = bbm->readp; ret = (long)bm->length; break; case BIO_CTRL_DUP: @@ -345,7 +320,7 @@ static long mem_ctrl(BIO *b, int cmd, long num, void *ptr) ret = 0; break; } - return (ret); + return ret; } static int mem_gets(BIO *bp, char *buf, int size) @@ -356,6 +331,8 @@ static int mem_gets(BIO *bp, char *buf, int size) BIO_BUF_MEM *bbm = (BIO_BUF_MEM *)bp->ptr; BUF_MEM *bm = bbm->readp; + if (bp->flags & BIO_FLAGS_MEM_RDONLY) + bm = bbm->buf; BIO_clear_retry_flags(bp); j = bm->length; if ((size - 1) < j) @@ -381,7 +358,7 @@ static int mem_gets(BIO *bp, char *buf, int size) if (i > 0) buf[i] = '\0'; ret = i; - return (ret); + return ret; } static int mem_puts(BIO *bp, const char *str) @@ -391,5 +368,5 @@ static int mem_puts(BIO *bp, const char *str) n = strlen(str); ret = mem_write(bp, str, n); /* memory semantics is that it will always work */ - return (ret); + return ret; }