-/* crypto/bio/bss_mem.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:
* 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
+ * 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
* 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
#include <stdio.h>
#include <errno.h>
-#include "cryptlib.h"
-#include <openssl/bio.h>
+#include "bio_lcl.h"
+#include "internal/cryptlib.h"
static int mem_write(BIO *h, const char *buf, int num);
static int mem_read(BIO *h, char *buf, int size);
static int mem_gets(BIO *h, char *str, int size);
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 BIO_METHOD mem_method=
- {
- BIO_TYPE_MEM,
- "memory buffer",
- mem_write,
- mem_read,
- mem_puts,
- mem_gets,
- mem_ctrl,
- mem_new,
- mem_free,
- NULL,
- };
+static int mem_buf_free(BIO *data, int free_all);
+static int mem_buf_sync(BIO *h);
+
+static const BIO_METHOD mem_method = {
+ BIO_TYPE_MEM,
+ "memory buffer",
+ mem_write,
+ mem_read,
+ mem_puts,
+ mem_gets,
+ mem_ctrl,
+ mem_new,
+ mem_free,
+ NULL,
+};
-/* bio->num is used to hold the value to return on 'empty', if it is
- * 0, should_retry is not set */
+static const BIO_METHOD secmem_method = {
+ BIO_TYPE_MEM,
+ "secure memory buffer",
+ mem_write,
+ mem_read,
+ mem_puts,
+ mem_gets,
+ mem_ctrl,
+ secmem_new,
+ mem_free,
+ NULL,
+};
-BIO_METHOD *BIO_s_mem(void)
- {
- return(&mem_method);
- }
+/* BIO memory stores buffer and read pointer */
+typedef struct bio_buf_mem_st {
+ struct buf_mem_st *buf; /* allocated buffer */
+ struct buf_mem_st *readp; /* read pointer */
+} BIO_BUF_MEM;
-BIO *BIO_new_mem_buf(void *buf, int len)
+/*
+ * bio->num is used to hold the value to return on 'empty', if it is 0,
+ * should_retry is not set
+ */
+
+const BIO_METHOD *BIO_s_mem(void)
+{
+ return (&mem_method);
+}
+
+const BIO_METHOD *BIO_s_secmem(void)
{
- BIO *ret;
- BUF_MEM *b;
- if (!buf) {
- BIOerr(BIO_F_BIO_NEW_MEM_BUF,BIO_R_NULL_PARAMETER);
- return NULL;
- }
- if(len == -1) len = strlen(buf);
- if(!(ret = BIO_new(BIO_s_mem())) ) return NULL;
- b = (BUF_MEM *)ret->ptr;
- b->data = buf;
- b->length = len;
- b->max = len;
- ret->flags |= BIO_FLAGS_MEM_RDONLY;
- /* Since this is static data retrying wont help */
- ret->num = 0;
- return ret;
+ return(&secmem_method);
+}
+
+BIO *BIO_new_mem_buf(const void *buf, int len)
+{
+ BIO *ret;
+ BUF_MEM *b;
+ BIO_BUF_MEM *bb;
+ size_t sz;
+
+ if (buf == NULL) {
+ BIOerr(BIO_F_BIO_NEW_MEM_BUF, BIO_R_NULL_PARAMETER);
+ return NULL;
+ }
+ sz = (len < 0) ? strlen(buf) : (size_t)len;
+ if ((ret = BIO_new(BIO_s_mem())) == NULL)
+ return NULL;
+ bb = (BIO_BUF_MEM *)ret->ptr;
+ b = bb->buf;
+ /* Cast away const and trust in the MEM_RDONLY flag. */
+ b->data = (void *)buf;
+ b->length = sz;
+ b->max = sz;
+ *bb->readp = *bb->buf;
+ ret->flags |= BIO_FLAGS_MEM_RDONLY;
+ /* Since this is static data retrying wont help */
+ ret->num = 0;
+ return ret;
+}
+
+static int mem_init(BIO *bi, unsigned long flags)
+{
+ BIO_BUF_MEM *bb = OPENSSL_zalloc(sizeof(*bb));
+
+ if (bb == NULL)
+ return(0);
+ if ((bb->buf = BUF_MEM_new_ex(flags)) == NULL)
+ return(0);
+ if ((bb->readp = OPENSSL_zalloc(sizeof(*bb->readp))) == NULL)
+ return(0);
+ *bb->readp = *bb->buf;
+ bi->shutdown = 1;
+ bi->init = 1;
+ bi->num = -1;
+ bi->ptr = (char *)bb;
+ return(1);
}
static int mem_new(BIO *bi)
- {
- BUF_MEM *b;
+{
+ return (mem_init(bi, 0L));
+}
- if ((b=BUF_MEM_new()) == NULL)
- return(0);
- bi->shutdown=1;
- bi->init=1;
- bi->num= -1;
- bi->ptr=(char *)b;
- return(1);
- }
+static int secmem_new(BIO *bi)
+{
+ return (mem_init(bi, BUF_MEM_FLAG_SECURE));
+}
static int mem_free(BIO *a)
- {
- if (a == NULL) return(0);
- if (a->shutdown)
- {
- if ((a->init) && (a->ptr != NULL))
- {
- BUF_MEM *b;
- b = (BUF_MEM *)a->ptr;
- if(a->flags & BIO_FLAGS_MEM_RDONLY) b->data = NULL;
- BUF_MEM_free(b);
- a->ptr=NULL;
- }
- }
- return(1);
- }
-
-static int mem_read(BIO *b, char *out, int outl)
- {
- int ret= -1;
- BUF_MEM *bm;
- int i;
- char *from,*to;
+{
+ return (mem_buf_free(a, 1));
+}
- bm=(BUF_MEM *)b->ptr;
- BIO_clear_retry_flags(b);
- ret=(outl > bm->length)?bm->length:outl;
- if ((out != NULL) && (ret > 0)) {
- memcpy(out,bm->data,ret);
- bm->length-=ret;
- /* memmove(&(bm->data[0]),&(bm->data[ret]), bm->length); */
- if(b->flags & BIO_FLAGS_MEM_RDONLY) bm->data += ret;
- else {
- from=(char *)&(bm->data[ret]);
- to=(char *)&(bm->data[0]);
- for (i=0; i<bm->length; i++)
- to[i]=from[i];
- }
- } else if (bm->length == 0)
- {
- if (b->num != 0)
- BIO_set_retry_read(b);
- ret= b->num;
- if(ret < 0)
- BIOerr(BIO_F_MEM_READ,BIO_R_EOF_ON_MEMORY_BIO);
- }
- return(ret);
- }
+static int mem_buf_free(BIO *a, int free_all)
+{
+ 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;
-static int mem_write(BIO *b, const char *in, int inl)
- {
- int ret= -1;
- int blen;
- BUF_MEM *bm;
+ 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 (1);
+}
- bm=(BUF_MEM *)b->ptr;
- if (in == NULL)
- {
- BIOerr(BIO_F_MEM_WRITE,BIO_R_NULL_PARAMETER);
- goto end;
- }
+/*
+ * Reallocate memory buffer if read pointer differs
+ */
+static int mem_buf_sync(BIO *b)
+{
+ if((b != NULL) && (b->init) && (b->ptr != NULL)) {
+ BIO_BUF_MEM *bbm = (BIO_BUF_MEM *)b->ptr;
- if(b->flags & BIO_FLAGS_MEM_RDONLY) {
- BIOerr(BIO_F_MEM_WRITE,BIO_R_WRITE_TO_READ_ONLY_BIO);
- goto end;
- }
+ 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);
+}
- BIO_clear_retry_flags(b);
- blen=bm->length;
- if (BUF_MEM_grow(bm,blen+inl) != (blen+inl))
- goto end;
- memcpy(&(bm->data[blen]),in,inl);
- ret=inl;
-end:
- return(ret);
- }
+static int mem_read(BIO *b, char *out, int outl)
+{
+ int ret = -1;
+ BIO_BUF_MEM *bbm = (BIO_BUF_MEM *)b->ptr;
+ BUF_MEM *bm = bbm->readp;
-static long mem_ctrl(BIO *b, int cmd, long num, void *ptr)
- {
- long ret=1;
- char **pptr;
+ 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->data += ret;
+ } else if (bm->length == 0) {
+ ret = b->num;
+ if (ret != 0)
+ BIO_set_retry_read(b);
+ }
+ return (ret);
+}
- BUF_MEM *bm=(BUF_MEM *)b->ptr;
+static int mem_write(BIO *b, const char *in, int inl)
+{
+ int ret = -1;
+ int blen;
+ BIO_BUF_MEM *bbm = (BIO_BUF_MEM *)b->ptr;
- switch (cmd)
- {
- case BIO_CTRL_RESET:
- if (bm->data != NULL)
- {
- /* For read only case reset to the start again */
- if(b->flags & BIO_FLAGS_MEM_RDONLY)
- {
- bm->data -= bm->max - bm->length;
- bm->length = bm->max;
- }
- else
- {
- memset(bm->data,0,bm->max);
- bm->length=0;
- }
- }
- break;
- case BIO_CTRL_EOF:
- ret=(long)(bm->length == 0);
- break;
- case BIO_C_SET_BUF_MEM_EOF_RETURN:
- b->num=(int)num;
- break;
- case BIO_CTRL_INFO:
- ret=(long)bm->length;
- if (ptr != NULL)
- {
- pptr=(char **)ptr;
- *pptr=(char *)&(bm->data[0]);
- }
- break;
- case BIO_C_SET_BUF_MEM:
- mem_free(b);
- b->shutdown=(int)num;
- b->ptr=ptr;
- break;
- case BIO_C_GET_BUF_MEM_PTR:
- if (ptr != NULL)
- {
- pptr=(char **)ptr;
- *pptr=(char *)bm;
- }
- break;
- case BIO_CTRL_GET_CLOSE:
- ret=(long)b->shutdown;
- break;
- case BIO_CTRL_SET_CLOSE:
- b->shutdown=(int)num;
- break;
+ if (in == NULL) {
+ BIOerr(BIO_F_MEM_WRITE, BIO_R_NULL_PARAMETER);
+ goto end;
+ }
+ if (b->flags & BIO_FLAGS_MEM_RDONLY) {
+ BIOerr(BIO_F_MEM_WRITE, BIO_R_WRITE_TO_READ_ONLY_BIO);
+ goto end;
+ }
+ BIO_clear_retry_flags(b);
+ blen = bbm->readp->length;
+ mem_buf_sync(b);
+ if (BUF_MEM_grow_clean(bbm->buf, blen + inl) == 0)
+ goto end;
+ memcpy(bbm->buf->data + blen, in, inl);
+ *bbm->readp = *bbm->buf;
+ ret = inl;
+ end:
+ return (ret);
+}
+
+static long mem_ctrl(BIO *b, int cmd, long num, void *ptr)
+{
+ long ret = 1;
+ char **pptr;
+ BIO_BUF_MEM *bbm = (BIO_BUF_MEM *)b->ptr;
+ BUF_MEM *bm;
- case BIO_CTRL_WPENDING:
- ret=0L;
- break;
- case BIO_CTRL_PENDING:
- ret=(long)bm->length;
- break;
- case BIO_CTRL_DUP:
- case BIO_CTRL_FLUSH:
- ret=1;
- break;
- case BIO_CTRL_PUSH:
- case BIO_CTRL_POP:
- default:
- ret=0;
- break;
- }
- return(ret);
- }
+ 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;
+ } else {
+ memset(bm->data, 0, bm->max);
+ bm->length = 0;
+ }
+ *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;
+ *pptr = (char *)&(bm->data[0]);
+ }
+ break;
+ case BIO_C_SET_BUF_MEM:
+ mem_buf_free(b, 0);
+ 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;
+ pptr = (char **)ptr;
+ *pptr = (char *)bm;
+ }
+ break;
+ case BIO_CTRL_GET_CLOSE:
+ ret = (long)b->shutdown;
+ break;
+ case BIO_CTRL_SET_CLOSE:
+ b->shutdown = (int)num;
+ break;
+ case BIO_CTRL_WPENDING:
+ ret = 0L;
+ break;
+ case BIO_CTRL_PENDING:
+ bm = bbm->readp;
+ ret = (long)bm->length;
+ break;
+ case BIO_CTRL_DUP:
+ case BIO_CTRL_FLUSH:
+ ret = 1;
+ break;
+ case BIO_CTRL_PUSH:
+ case BIO_CTRL_POP:
+ default:
+ ret = 0;
+ break;
+ }
+ return (ret);
+}
static int mem_gets(BIO *bp, char *buf, int size)
- {
- int i,j;
- int ret= -1;
- char *p;
- BUF_MEM *bm=(BUF_MEM *)bp->ptr;
+{
+ int i, j;
+ int ret = -1;
+ char *p;
+ BIO_BUF_MEM *bbm = (BIO_BUF_MEM *)bp->ptr;
+ BUF_MEM *bm = bbm->readp;
- BIO_clear_retry_flags(bp);
- j=bm->length;
- if (j <= 0) return(0);
- p=bm->data;
- for (i=0; i<j; i++)
- {
- if (p[i] == '\n') break;
- }
- if (i == j)
- {
- BIO_set_retry_read(bp);
- /* return(-1); change the semantics 0.6.6a */
- }
- else
- i++;
- /* i is the max to copy */
- if ((size-1) < i) i=size-1;
- i=mem_read(bp,buf,i);
- if (i > 0) buf[i]='\0';
- ret=i;
- return(ret);
- }
+ BIO_clear_retry_flags(bp);
+ j = bm->length;
+ if ((size - 1) < j)
+ j = size - 1;
+ if (j <= 0) {
+ *buf = '\0';
+ return 0;
+ }
+ p = bm->data;
+ for (i = 0; i < j; i++) {
+ if (p[i] == '\n') {
+ i++;
+ break;
+ }
+ }
-static int mem_puts(BIO *bp, const char *str)
- {
- int n,ret;
+ /*
+ * i is now the max num of bytes to copy, either j or up to
+ * and including the first newline
+ */
+
+ i = mem_read(bp, buf, i);
+ if (i > 0)
+ buf[i] = '\0';
+ ret = i;
+ return (ret);
+}
- n=strlen(str);
- ret=mem_write(bp,str,n);
- /* memory semantics is that it will always work */
- return(ret);
- }
+static int mem_puts(BIO *bp, const char *str)
+{
+ int n, ret;
+ n = strlen(str);
+ ret = mem_write(bp, str, n);
+ /* memory semantics is that it will always work */
+ return (ret);
+}
projects / openssl.git / blobdiff