* 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
* [including the GNU Public Licence.]
*/
-/*
- From: Arne Ansper <arne@cyber.ee>
-
- Why BIO_f_reliable?
-
- I wrote function which took BIO* as argument, read data from it
- and processed it. Then I wanted to store the input file in
- encrypted form. OK I pushed BIO_f_cipher to the BIO stack
- and everything was OK. BUT if user types wrong password
- BIO_f_cipher outputs only garbage and my function crashes. Yes
- I can and I should fix my function, but BIO_f_cipher is
- easy way to add encryption support to many exisiting applications
- and it's hard to debug and fix them all.
-
- So I wanted another BIO which would catch the incorrect passwords and
- file damages which cause garbage on BIO_f_cipher's output.
-
- The easy way is to push the BIO_f_md and save the checksum at
- the end of the file. However there are several problems with this
- approach:
-
- 1) you must somehow separate checksum from actual data.
- 2) you need lot's of memory when reading the file, because you
- must read to the end of the file and verify the checksum before
- leting the application to read the data.
-
- BIO_f_reliable tries to solve both problems, so that you can
- read and write arbitraly long streams using only fixed amount
- of memory.
-
- BIO_f_reliable splits data stream into blocks. Each block is prefixed
- with it's length and suffixed with it's digest. So you need only
- several Kbytes of memory to buffer single block before verifying
- it's digest.
-
- BIO_f_reliable goes futher and adds several important capabilities:
-
- 1) the digest of the block is computed over the whole stream
- -- so nobody can rearrange the blocks or remove or replace them.
-
- 2) to detect invalid passwords right at the start BIO_f_reliable
- adds special prefix to the stream. In order to avoid known plain-text
- attacks this prefix is generated as follows:
-
- *) digest is initialized with random seed instead of
- standardized one.
- *) same seed is written to ouput
- *) well-known text is then hashed and the output
- of the digest is also written to output.
-
- reader can now read the seed from stream, hash the same string
- and then compare the digest output.
-
- Bad things: BIO_f_reliable knows what's going on in EVP_Digest. I
- initialy wrote and tested this code on x86 machine and wrote the
- digests out in machine-dependent order :( There are people using
- this code and I cannot change this easily without making existing
- data files unreadable.
+/*-
+
From: Arne Ansper <arne@cyber.ee>
+
+ Why BIO_f_reliable?
+
+ I wrote function which took BIO* as argument, read data from it
+ and processed it. Then I wanted to store the input file in
+ encrypted form. OK I pushed BIO_f_cipher to the BIO stack
+ and everything was OK. BUT if user types wrong password
+ BIO_f_cipher outputs only garbage and my function crashes. Yes
+ I can and I should fix my function, but BIO_f_cipher is
+ easy way to add encryption support to many existing applications
+ and it's hard to debug and fix them all.
+
+ So I wanted another BIO which would catch the incorrect passwords and
+ file damages which cause garbage on BIO_f_cipher's output.
+
+ The easy way is to push the BIO_f_md and save the checksum at
+ the end of the file. However there are several problems with this
+ approach:
+
+ 1) you must somehow separate checksum from actual data.
+ 2) you need lot's of memory when reading the file, because you
+ must read to the end of the file and verify the checksum before
+ letting the application to read the data.
+
+ BIO_f_reliable tries to solve both problems, so that you can
+ read and write arbitrary long streams using only fixed amount
+ of memory.
+
+ BIO_f_reliable splits data stream into blocks. Each block is prefixed
+ with it's length and suffixed with it's digest. So you need only
+ several Kbytes of memory to buffer single block before verifying
+ it's digest.
+
+ BIO_f_reliable goes further and adds several important capabilities:
+
+ 1) the digest of the block is computed over the whole stream
+ -- so nobody can rearrange the blocks or remove or replace them.
+
+ 2) to detect invalid passwords right at the start BIO_f_reliable
+ adds special prefix to the stream. In order to avoid known plain-text
+ attacks this prefix is generated as follows:
+
+ *) digest is initialized with random seed instead of
+ standardized one.
+ *) same seed is written to output
+ *) well-known text is then hashed and the output
+ of the digest is also written to output.
+
+ reader can now read the seed from stream, hash the same string
+ and then compare the digest output.
+
+ Bad things: BIO_f_reliable knows what's going on in EVP_Digest. I
+ initially wrote and tested this code on x86 machine and wrote the
+ digests out in machine-dependent order :( There are people using
+ this code and I cannot change this easily without making existing
+ data files unreadable.
*/
#include <stdio.h>
#include <errno.h>
-#include "cryptlib.h"
+#include <assert.h>
+#include "internal/cryptlib.h"
#include <openssl/buffer.h>
#include <openssl/bio.h>
#include <openssl/evp.h>
#include <openssl/rand.h>
-static int ok_write(BIO *h,char *buf,int num);
-static int ok_read(BIO *h,char *buf,int size);
-static long ok_ctrl(BIO *h,int cmd,long arg1,char *arg2);
+static int ok_write(BIO *h, const char *buf, int num);
+static int ok_read(BIO *h, char *buf, int size);
+static long ok_ctrl(BIO *h, int cmd, long arg1, void *arg2);
static int ok_new(BIO *h);
static int ok_free(BIO *data);
-static void sig_out(BIO* b);
-static void sig_in(BIO* b);
-static void block_out(BIO* b);
-static void block_in(BIO* b);
-#define OK_BLOCK_SIZE (1024*4)
-#define OK_BLOCK_BLOCK 4
-#define IOBS (OK_BLOCK_SIZE+ OK_BLOCK_BLOCK+ 3*EVP_MAX_MD_SIZE)
+static long ok_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp);
+
+static __owur int sig_out(BIO *b);
+static __owur int sig_in(BIO *b);
+static __owur int block_out(BIO *b);
+static __owur int block_in(BIO *b);
+#define OK_BLOCK_SIZE (1024*4)
+#define OK_BLOCK_BLOCK 4
+#define IOBS (OK_BLOCK_SIZE+ OK_BLOCK_BLOCK+ 3*EVP_MAX_MD_SIZE)
#define WELLKNOWN "The quick brown fox jumped over the lazy dog's back."
-#ifndef L_ENDIAN
-#define swapem(x) \
- ((unsigned long int)((((unsigned long int)(x) & 0x000000ffU) << 24) | \
- (((unsigned long int)(x) & 0x0000ff00U) << 8) | \
- (((unsigned long int)(x) & 0x00ff0000U) >> 8) | \
- (((unsigned long int)(x) & 0xff000000U) >> 24)))
-#else
-#define swapem(x) (x)
-#endif
-
-typedef struct ok_struct
- {
- int buf_len;
- int buf_off;
- int buf_len_save;
- int buf_off_save;
- int cont; /* <= 0 when finished */
- int finished;
- EVP_MD_CTX md;
- int blockout; /* output block is ready */
- int sigio; /* must process signature */
- char buf[IOBS];
- } BIO_OK_CTX;
-
-static BIO_METHOD methods_ok=
- {
- BIO_TYPE_CIPHER,"reliable",
- ok_write,
- ok_read,
- NULL, /* ok_puts, */
- NULL, /* ok_gets, */
- ok_ctrl,
- ok_new,
- ok_free,
- };
+typedef struct ok_struct {
+ size_t buf_len;
+ size_t buf_off;
+ size_t buf_len_save;
+ size_t buf_off_save;
+ int cont; /* <= 0 when finished */
+ int finished;
+ EVP_MD_CTX *md;
+ int blockout; /* output block is ready */
+ int sigio; /* must process signature */
+ unsigned char buf[IOBS];
+} BIO_OK_CTX;
+
+static BIO_METHOD methods_ok = {
+ BIO_TYPE_CIPHER, "reliable",
+ ok_write,
+ ok_read,
+ NULL, /* ok_puts, */
+ NULL, /* ok_gets, */
+ ok_ctrl,
+ ok_new,
+ ok_free,
+ ok_callback_ctrl,
+};
BIO_METHOD *BIO_f_reliable(void)
- {
- return(&methods_ok);
- }
+{
+ return (&methods_ok);
+}
static int ok_new(BIO *bi)
- {
- BIO_OK_CTX *ctx;
-
- ctx=(BIO_OK_CTX *)Malloc(sizeof(BIO_OK_CTX));
- if (ctx == NULL) return(0);
-
- ctx->buf_len=0;
- ctx->buf_off=0;
- ctx->buf_len_save=0;
- ctx->buf_off_save=0;
- ctx->cont=1;
- ctx->finished=0;
- ctx->blockout= 0;
- ctx->sigio=1;
-
- bi->init=0;
- bi->ptr=(char *)ctx;
- bi->flags=0;
- return(1);
- }
+{
+ BIO_OK_CTX *ctx;
+
+ ctx = OPENSSL_zalloc(sizeof(*ctx));
+ if (ctx == NULL)
+ return (0);
+
+ ctx->cont = 1;
+ ctx->sigio = 1;
+ ctx->md = EVP_MD_CTX_create();
+ bi->init = 0;
+ bi->ptr = (char *)ctx;
+ bi->flags = 0;
+ return (1);
+}
static int ok_free(BIO *a)
- {
- if (a == NULL) return(0);
- memset(a->ptr,0,sizeof(BIO_OK_CTX));
- Free(a->ptr);
- a->ptr=NULL;
- a->init=0;
- a->flags=0;
- return(1);
- }
-
+{
+ if (a == NULL)
+ return (0);
+ EVP_MD_CTX_destroy(((BIO_OK_CTX *)a->ptr)->md);
+ OPENSSL_clear_free(a->ptr, sizeof(BIO_OK_CTX));
+ a->ptr = NULL;
+ a->init = 0;
+ a->flags = 0;
+ return (1);
+}
+
static int ok_read(BIO *b, char *out, int outl)
- {
- int ret=0,i,n;
- BIO_OK_CTX *ctx;
-
- if (out == NULL) return(0);
- ctx=(BIO_OK_CTX *)b->ptr;
-
- if ((ctx == NULL) || (b->next_bio == NULL) || (b->init == 0)) return(0);
-
- while(outl > 0)
- {
-
- /* copy clean bytes to output buffer */
- if (ctx->blockout)
- {
- i=ctx->buf_len-ctx->buf_off;
- if (i > outl) i=outl;
- memcpy(out,&(ctx->buf[ctx->buf_off]),i);
- ret+=i;
- out+=i;
- outl-=i;
- ctx->buf_off+=i;
-
- /* all clean bytes are out */
- if (ctx->buf_len == ctx->buf_off)
- {
- ctx->buf_off=0;
-
- /* copy start of the next block into proper place */
- if(ctx->buf_len_save- ctx->buf_off_save > 0)
- {
- ctx->buf_len= ctx->buf_len_save- ctx->buf_off_save;
- memmove(ctx->buf, &(ctx->buf[ctx->buf_off_save]),
- ctx->buf_len);
- }
- else
- {
- ctx->buf_len=0;
- }
- ctx->blockout= 0;
- }
- }
-
- /* output buffer full -- cancel */
- if (outl == 0) break;
-
- /* no clean bytes in buffer -- fill it */
- n=IOBS- ctx->buf_len;
- i=BIO_read(b->next_bio,&(ctx->buf[ctx->buf_len]),n);
-
- if (i <= 0) break; /* nothing new */
-
- ctx->buf_len+= i;
-
- /* no signature yet -- check if we got one */
- if (ctx->sigio == 1) sig_in(b);
-
- /* signature ok -- check if we got block */
- if (ctx->sigio == 0) block_in(b);
-
- /* invalid block -- cancel */
- if (ctx->cont <= 0) break;
-
- }
-
- BIO_clear_retry_flags(b);
- BIO_copy_next_retry(b);
- return(ret);
- }
-
-static int ok_write(BIO *b, char *in, int inl)
- {
- int ret=0,n,i;
- BIO_OK_CTX *ctx;
-
- ctx=(BIO_OK_CTX *)b->ptr;
- ret=inl;
-
- if ((ctx == NULL) || (b->next_bio == NULL) || (b->init == 0)) return(0);
-
- if(ctx->sigio) sig_out(b);
-
- do{
- BIO_clear_retry_flags(b);
- n=ctx->buf_len-ctx->buf_off;
- while (ctx->blockout && n > 0)
- {
- i=BIO_write(b->next_bio,&(ctx->buf[ctx->buf_off]),n);
- if (i <= 0)
- {
- BIO_copy_next_retry(b);
- if(!BIO_should_retry(b))
- ctx->cont= 0;
- return(i);
- }
- ctx->buf_off+=i;
- n-=i;
- }
-
- /* at this point all pending data has been written */
- ctx->blockout= 0;
- if (ctx->buf_len == ctx->buf_off)
- {
- ctx->buf_len=OK_BLOCK_BLOCK;
- ctx->buf_off=0;
- }
-
- if ((in == NULL) || (inl <= 0)) return(0);
-
- n= (inl+ ctx->buf_len > OK_BLOCK_SIZE+ OK_BLOCK_BLOCK) ?
- OK_BLOCK_SIZE+ OK_BLOCK_BLOCK- ctx->buf_len : inl;
-
- memcpy((unsigned char *)(&(ctx->buf[ctx->buf_len])),(unsigned char *)in,n);
- ctx->buf_len+= n;
- inl-=n;
- in+=n;
-
- if(ctx->buf_len >= OK_BLOCK_SIZE+ OK_BLOCK_BLOCK)
- {
- block_out(b);
- }
- }while(inl > 0);
-
- BIO_clear_retry_flags(b);
- BIO_copy_next_retry(b);
- return(ret);
- }
-
-static long ok_ctrl(BIO *b, int cmd, long num, char *ptr)
- {
- BIO_OK_CTX *ctx;
- EVP_MD *md;
- const EVP_MD **ppmd;
- long ret=1;
- int i;
-
- ctx=(BIO_OK_CTX *)b->ptr;
-
- switch (cmd)
- {
- case BIO_CTRL_RESET:
- ctx->buf_len=0;
- ctx->buf_off=0;
- ctx->buf_len_save=0;
- ctx->buf_off_save=0;
- ctx->cont=1;
- ctx->finished=0;
- ctx->blockout= 0;
- ctx->sigio=1;
- ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
- break;
- case BIO_CTRL_EOF: /* More to read */
- if (ctx->cont <= 0)
- ret=1;
- else
- ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
- break;
- case BIO_CTRL_PENDING: /* More to read in buffer */
- case BIO_CTRL_WPENDING: /* More to read in buffer */
- ret=ctx->blockout ? ctx->buf_len-ctx->buf_off : 0;
- if (ret <= 0)
- ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
- break;
- case BIO_CTRL_FLUSH:
- /* do a final write */
- if(ctx->blockout == 0)
- block_out(b);
-
- while (ctx->blockout)
- {
- i=ok_write(b,NULL,0);
- if (i < 0)
- {
- ret=i;
- break;
- }
- }
-
- ctx->finished=1;
- ctx->buf_off=ctx->buf_len=0;
- ctx->cont=(int)ret;
-
- /* Finally flush the underlying BIO */
- ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
- 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_CTRL_INFO:
- ret=(long)ctx->cont;
- break;
- case BIO_C_SET_MD:
- md=(EVP_MD *)ptr;
- EVP_DigestInit(&(ctx->md),md);
- b->init=1;
- break;
- case BIO_C_GET_MD:
- if (b->init)
- {
- ppmd=(const EVP_MD **)ptr;
- *ppmd=ctx->md.digest;
- }
- else
- ret=0;
- break;
- default:
- ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
- break;
- }
- return(ret);
- }
-
-static void longswap(void *_ptr, int len)
{
-#ifndef L_ENDIAN
- int i;
- char *ptr=_ptr;
-
- for(i= 0;i < len;i+= 4){
- *((unsigned long *)&(ptr[i]))= swapem(*((unsigned long *)&(ptr[i])));
- }
-#endif
+ int ret = 0, i, n;
+ BIO_OK_CTX *ctx;
+
+ if (out == NULL)
+ return (0);
+ ctx = (BIO_OK_CTX *)b->ptr;
+
+ if ((ctx == NULL) || (b->next_bio == NULL) || (b->init == 0))
+ return (0);
+
+ while (outl > 0) {
+
+ /* copy clean bytes to output buffer */
+ if (ctx->blockout) {
+ i = ctx->buf_len - ctx->buf_off;
+ if (i > outl)
+ i = outl;
+ memcpy(out, &(ctx->buf[ctx->buf_off]), i);
+ ret += i;
+ out += i;
+ outl -= i;
+ ctx->buf_off += i;
+
+ /* all clean bytes are out */
+ if (ctx->buf_len == ctx->buf_off) {
+ ctx->buf_off = 0;
+
+ /*
+ * copy start of the next block into proper place
+ */
+ if (ctx->buf_len_save - ctx->buf_off_save > 0) {
+ ctx->buf_len = ctx->buf_len_save - ctx->buf_off_save;
+ memmove(ctx->buf, &(ctx->buf[ctx->buf_off_save]),
+ ctx->buf_len);
+ } else {
+ ctx->buf_len = 0;
+ }
+ ctx->blockout = 0;
+ }
+ }
+
+ /* output buffer full -- cancel */
+ if (outl == 0)
+ break;
+
+ /* no clean bytes in buffer -- fill it */
+ n = IOBS - ctx->buf_len;
+ i = BIO_read(b->next_bio, &(ctx->buf[ctx->buf_len]), n);
+
+ if (i <= 0)
+ break; /* nothing new */
+
+ ctx->buf_len += i;
+
+ /* no signature yet -- check if we got one */
+ if (ctx->sigio == 1) {
+ if (!sig_in(b)) {
+ BIO_clear_retry_flags(b);
+ return 0;
+ }
+ }
+
+ /* signature ok -- check if we got block */
+ if (ctx->sigio == 0) {
+ if (!block_in(b)) {
+ BIO_clear_retry_flags(b);
+ return 0;
+ }
+ }
+
+ /* invalid block -- cancel */
+ if (ctx->cont <= 0)
+ break;
+
+ }
+
+ BIO_clear_retry_flags(b);
+ BIO_copy_next_retry(b);
+ return (ret);
+}
+
+static int ok_write(BIO *b, const char *in, int inl)
+{
+ int ret = 0, n, i;
+ BIO_OK_CTX *ctx;
+
+ if (inl <= 0)
+ return inl;
+
+ ctx = (BIO_OK_CTX *)b->ptr;
+ ret = inl;
+
+ if ((ctx == NULL) || (b->next_bio == NULL) || (b->init == 0))
+ return (0);
+
+ if (ctx->sigio && !sig_out(b))
+ return 0;
+
+ do {
+ BIO_clear_retry_flags(b);
+ n = ctx->buf_len - ctx->buf_off;
+ while (ctx->blockout && n > 0) {
+ i = BIO_write(b->next_bio, &(ctx->buf[ctx->buf_off]), n);
+ if (i <= 0) {
+ BIO_copy_next_retry(b);
+ if (!BIO_should_retry(b))
+ ctx->cont = 0;
+ return (i);
+ }
+ ctx->buf_off += i;
+ n -= i;
+ }
+
+ /* at this point all pending data has been written */
+ ctx->blockout = 0;
+ if (ctx->buf_len == ctx->buf_off) {
+ ctx->buf_len = OK_BLOCK_BLOCK;
+ ctx->buf_off = 0;
+ }
+
+ if ((in == NULL) || (inl <= 0))
+ return (0);
+
+ n = (inl + ctx->buf_len > OK_BLOCK_SIZE + OK_BLOCK_BLOCK) ?
+ (int)(OK_BLOCK_SIZE + OK_BLOCK_BLOCK - ctx->buf_len) : inl;
+
+ memcpy(&ctx->buf[ctx->buf_len], in, n);
+ ctx->buf_len += n;
+ inl -= n;
+ in += n;
+
+ if (ctx->buf_len >= OK_BLOCK_SIZE + OK_BLOCK_BLOCK) {
+ if (!block_out(b)) {
+ BIO_clear_retry_flags(b);
+ return 0;
+ }
+ }
+ } while (inl > 0);
+
+ BIO_clear_retry_flags(b);
+ BIO_copy_next_retry(b);
+ return (ret);
+}
+
+static long ok_ctrl(BIO *b, int cmd, long num, void *ptr)
+{
+ BIO_OK_CTX *ctx;
+ EVP_MD *md;
+ const EVP_MD **ppmd;
+ long ret = 1;
+ int i;
+
+ ctx = b->ptr;
+
+ switch (cmd) {
+ case BIO_CTRL_RESET:
+ ctx->buf_len = 0;
+ ctx->buf_off = 0;
+ ctx->buf_len_save = 0;
+ ctx->buf_off_save = 0;
+ ctx->cont = 1;
+ ctx->finished = 0;
+ ctx->blockout = 0;
+ ctx->sigio = 1;
+ ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
+ break;
+ case BIO_CTRL_EOF: /* More to read */
+ if (ctx->cont <= 0)
+ ret = 1;
+ else
+ ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
+ break;
+ case BIO_CTRL_PENDING: /* More to read in buffer */
+ case BIO_CTRL_WPENDING: /* More to read in buffer */
+ ret = ctx->blockout ? ctx->buf_len - ctx->buf_off : 0;
+ if (ret <= 0)
+ ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
+ break;
+ case BIO_CTRL_FLUSH:
+ /* do a final write */
+ if (ctx->blockout == 0)
+ if (!block_out(b))
+ return 0;
+
+ while (ctx->blockout) {
+ i = ok_write(b, NULL, 0);
+ if (i < 0) {
+ ret = i;
+ break;
+ }
+ }
+
+ ctx->finished = 1;
+ ctx->buf_off = ctx->buf_len = 0;
+ ctx->cont = (int)ret;
+
+ /* Finally flush the underlying BIO */
+ ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
+ 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_CTRL_INFO:
+ ret = (long)ctx->cont;
+ break;
+ case BIO_C_SET_MD:
+ md = ptr;
+ if (!EVP_DigestInit_ex(ctx->md, md, NULL))
+ return 0;
+ b->init = 1;
+ break;
+ case BIO_C_GET_MD:
+ if (b->init) {
+ ppmd = ptr;
+ *ppmd = EVP_MD_CTX_md(ctx->md);
+ } else
+ ret = 0;
+ break;
+ default:
+ ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
+ break;
+ }
+ return (ret);
+}
+
+static long ok_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 void sig_out(BIO* b)
- {
- BIO_OK_CTX *ctx;
- EVP_MD_CTX *md;
-
- ctx=(BIO_OK_CTX *)b->ptr;
- md= &(ctx->md);
-
- if(ctx->buf_len+ 2* md->digest->md_size > OK_BLOCK_SIZE) return;
-
- EVP_DigestInit(md, md->digest);
- RAND_pseudo_bytes(&(md->md.base[0]), md->digest->md_size);
- memcpy(&(ctx->buf[ctx->buf_len]), &(md->md.base[0]), md->digest->md_size);
- longswap(&(ctx->buf[ctx->buf_len]), md->digest->md_size);
- ctx->buf_len+= md->digest->md_size;
-
- EVP_DigestUpdate(md, WELLKNOWN, strlen(WELLKNOWN));
- md->digest->final(&(ctx->buf[ctx->buf_len]), &(md->md.base[0]));
- ctx->buf_len+= md->digest->md_size;
- ctx->blockout= 1;
- ctx->sigio= 0;
- }
-
-static void sig_in(BIO* b)
- {
- BIO_OK_CTX *ctx;
- EVP_MD_CTX *md;
- unsigned char tmp[EVP_MAX_MD_SIZE];
- int ret= 0;
-
- ctx=(BIO_OK_CTX *)b->ptr;
- md= &(ctx->md);
-
- if(ctx->buf_len- ctx->buf_off < 2* md->digest->md_size) return;
-
- EVP_DigestInit(md, md->digest);
- memcpy(&(md->md.base[0]), &(ctx->buf[ctx->buf_off]), md->digest->md_size);
- longswap(&(md->md.base[0]), md->digest->md_size);
- ctx->buf_off+= md->digest->md_size;
-
- EVP_DigestUpdate(md, WELLKNOWN, strlen(WELLKNOWN));
- md->digest->final(tmp, &(md->md.base[0]));
- ret= memcmp(&(ctx->buf[ctx->buf_off]), tmp, md->digest->md_size) == 0;
- ctx->buf_off+= md->digest->md_size;
- if(ret == 1)
- {
- ctx->sigio= 0;
- if(ctx->buf_len != ctx->buf_off)
- {
- memmove(ctx->buf, &(ctx->buf[ctx->buf_off]), ctx->buf_len- ctx->buf_off);
- }
- ctx->buf_len-= ctx->buf_off;
- ctx->buf_off= 0;
- }
- else
- {
- ctx->cont= 0;
- }
- }
-
-static void block_out(BIO* b)
- {
- BIO_OK_CTX *ctx;
- EVP_MD_CTX *md;
- unsigned long tl;
-
- ctx=(BIO_OK_CTX *)b->ptr;
- md= &(ctx->md);
-
- tl= ctx->buf_len- OK_BLOCK_BLOCK;
- tl= swapem(tl);
- memcpy(ctx->buf, &tl, OK_BLOCK_BLOCK);
- tl= swapem(tl);
- EVP_DigestUpdate(md, (unsigned char*) &(ctx->buf[OK_BLOCK_BLOCK]), tl);
- md->digest->final(&(ctx->buf[ctx->buf_len]), &(md->md.base[0]));
- ctx->buf_len+= md->digest->md_size;
- ctx->blockout= 1;
- }
-
-static void block_in(BIO* b)
- {
- BIO_OK_CTX *ctx;
- EVP_MD_CTX *md;
- long tl= 0;
- unsigned char tmp[EVP_MAX_MD_SIZE];
-
- ctx=(BIO_OK_CTX *)b->ptr;
- md= &(ctx->md);
-
- memcpy(&tl, ctx->buf, OK_BLOCK_BLOCK);
- tl= swapem(tl);
- if (ctx->buf_len < tl+ OK_BLOCK_BLOCK+ md->digest->md_size) return;
-
- EVP_DigestUpdate(md, (unsigned char*) &(ctx->buf[OK_BLOCK_BLOCK]), tl);
- md->digest->final(tmp, &(md->md.base[0]));
- if(memcmp(&(ctx->buf[tl+ OK_BLOCK_BLOCK]), tmp, md->digest->md_size) == 0)
- {
- /* there might be parts from next block lurking around ! */
- ctx->buf_off_save= tl+ OK_BLOCK_BLOCK+ md->digest->md_size;
- ctx->buf_len_save= ctx->buf_len;
- ctx->buf_off= OK_BLOCK_BLOCK;
- ctx->buf_len= tl+ OK_BLOCK_BLOCK;
- ctx->blockout= 1;
- }
- else
- {
- ctx->cont= 0;
- }
- }
+static void longswap(void *_ptr, size_t len)
+{
+ const union {
+ long one;
+ char little;
+ } is_endian = {
+ 1
+ };
+
+ if (is_endian.little) {
+ size_t i;
+ unsigned char *p = _ptr, c;
+
+ for (i = 0; i < len; i += 4) {
+ c = p[0], p[0] = p[3], p[3] = c;
+ c = p[1], p[1] = p[2], p[2] = c;
+ }
+ }
+}
+static int sig_out(BIO *b)
+{
+ BIO_OK_CTX *ctx;
+ EVP_MD_CTX *md;
+ const EVP_MD *digest;
+ int md_size;
+ void *md_data;
+
+ ctx = b->ptr;
+ md = ctx->md;
+ digest = EVP_MD_CTX_md(md);
+ md_size = EVP_MD_size(digest);
+ md_data = EVP_MD_CTX_md_data(md);
+
+ if (ctx->buf_len + 2 * md_size > OK_BLOCK_SIZE)
+ return 1;
+
+ if (!EVP_DigestInit_ex(md, digest, NULL))
+ goto berr;
+ /*
+ * FIXME: there's absolutely no guarantee this makes any sense at all,
+ * particularly now EVP_MD_CTX has been restructured.
+ */
+ if (RAND_bytes(md_data, md_size) <= 0)
+ goto berr;
+ memcpy(&(ctx->buf[ctx->buf_len]), md_data, md_size);
+ longswap(&(ctx->buf[ctx->buf_len]), md_size);
+ ctx->buf_len += md_size;
+
+ if (!EVP_DigestUpdate(md, WELLKNOWN, strlen(WELLKNOWN)))
+ goto berr;
+ if (!EVP_DigestFinal_ex(md, &(ctx->buf[ctx->buf_len]), NULL))
+ goto berr;
+ ctx->buf_len += md_size;
+ ctx->blockout = 1;
+ ctx->sigio = 0;
+ return 1;
+ berr:
+ BIO_clear_retry_flags(b);
+ return 0;
+}
+
+static int sig_in(BIO *b)
+{
+ BIO_OK_CTX *ctx;
+ EVP_MD_CTX *md;
+ unsigned char tmp[EVP_MAX_MD_SIZE];
+ int ret = 0;
+ const EVP_MD *digest;
+ int md_size;
+ void *md_data;
+
+ ctx = b->ptr;
+ md = ctx->md;
+ digest = EVP_MD_CTX_md(md);
+ md_size = EVP_MD_size(digest);
+ md_data = EVP_MD_CTX_md_data(md);
+
+ if ((int)(ctx->buf_len - ctx->buf_off) < 2 * md_size)
+ return 1;
+
+ if (!EVP_DigestInit_ex(md, digest, NULL))
+ goto berr;
+ memcpy(md_data, &(ctx->buf[ctx->buf_off]), md_size);
+ longswap(md_data, md_size);
+ ctx->buf_off += md_size;
+
+ if (!EVP_DigestUpdate(md, WELLKNOWN, strlen(WELLKNOWN)))
+ goto berr;
+ if (!EVP_DigestFinal_ex(md, tmp, NULL))
+ goto berr;
+ ret = memcmp(&(ctx->buf[ctx->buf_off]), tmp, md_size) == 0;
+ ctx->buf_off += md_size;
+ if (ret == 1) {
+ ctx->sigio = 0;
+ if (ctx->buf_len != ctx->buf_off) {
+ memmove(ctx->buf, &(ctx->buf[ctx->buf_off]),
+ ctx->buf_len - ctx->buf_off);
+ }
+ ctx->buf_len -= ctx->buf_off;
+ ctx->buf_off = 0;
+ } else {
+ ctx->cont = 0;
+ }
+ return 1;
+ berr:
+ BIO_clear_retry_flags(b);
+ return 0;
+}
+
+static int block_out(BIO *b)
+{
+ BIO_OK_CTX *ctx;
+ EVP_MD_CTX *md;
+ unsigned long tl;
+ const EVP_MD *digest;
+ int md_size;
+
+ ctx = b->ptr;
+ md = ctx->md;
+ digest = EVP_MD_CTX_md(md);
+ md_size = EVP_MD_size(digest);
+
+ tl = ctx->buf_len - OK_BLOCK_BLOCK;
+ ctx->buf[0] = (unsigned char)(tl >> 24);
+ ctx->buf[1] = (unsigned char)(tl >> 16);
+ ctx->buf[2] = (unsigned char)(tl >> 8);
+ ctx->buf[3] = (unsigned char)(tl);
+ if (!EVP_DigestUpdate(md,
+ (unsigned char *)&(ctx->buf[OK_BLOCK_BLOCK]), tl))
+ goto berr;
+ if (!EVP_DigestFinal_ex(md, &(ctx->buf[ctx->buf_len]), NULL))
+ goto berr;
+ ctx->buf_len += md_size;
+ ctx->blockout = 1;
+ return 1;
+ berr:
+ BIO_clear_retry_flags(b);
+ return 0;
+}
+
+static int block_in(BIO *b)
+{
+ BIO_OK_CTX *ctx;
+ EVP_MD_CTX *md;
+ unsigned long tl = 0;
+ unsigned char tmp[EVP_MAX_MD_SIZE];
+ int md_size;
+
+ ctx = b->ptr;
+ md = ctx->md;
+ md_size = EVP_MD_size(EVP_MD_CTX_md(md));
+
+ assert(sizeof(tl) >= OK_BLOCK_BLOCK); /* always true */
+ tl = ctx->buf[0];
+ tl <<= 8;
+ tl |= ctx->buf[1];
+ tl <<= 8;
+ tl |= ctx->buf[2];
+ tl <<= 8;
+ tl |= ctx->buf[3];
+
+ if (ctx->buf_len < tl + OK_BLOCK_BLOCK + md_size)
+ return 1;
+
+ if (!EVP_DigestUpdate(md,
+ (unsigned char *)&(ctx->buf[OK_BLOCK_BLOCK]), tl))
+ goto berr;
+ if (!EVP_DigestFinal_ex(md, tmp, NULL))
+ goto berr;
+ if (memcmp(&(ctx->buf[tl + OK_BLOCK_BLOCK]), tmp, md_size) == 0) {
+ /* there might be parts from next block lurking around ! */
+ ctx->buf_off_save = tl + OK_BLOCK_BLOCK + md_size;
+ ctx->buf_len_save = ctx->buf_len;
+ ctx->buf_off = OK_BLOCK_BLOCK;
+ ctx->buf_len = tl + OK_BLOCK_BLOCK;
+ ctx->blockout = 1;
+ } else {
+ ctx->cont = 0;
+ }
+ return 1;
+ berr:
+ BIO_clear_retry_flags(b);
+ return 0;
+}
projects / openssl.git / blobdiff