#include <stdio.h>
#include <errno.h>
#include "cryptlib.h"
-#include "buffer.h"
-#include "evp.h"
-
-#ifndef NOPROTO
-static int enc_write(BIO *h,char *buf,int num);
-static int enc_read(BIO *h,char *buf,int size);
-/*static int enc_puts(BIO *h,char *str); */
-/*static int enc_gets(BIO *h,char *str,int size); */
-static long enc_ctrl(BIO *h,int cmd,long arg1,char *arg2);
+#include <openssl/buffer.h>
+#include <openssl/evp.h>
+
+static int enc_write(BIO *h, const char *buf, int num);
+static int enc_read(BIO *h, char *buf, int size);
+/*static int enc_puts(BIO *h, const char *str); */
+/*static int enc_gets(BIO *h, char *str, int size); */
+static long enc_ctrl(BIO *h, int cmd, long arg1, void *arg2);
static int enc_new(BIO *h);
static int enc_free(BIO *data);
-#else
-static int enc_write();
-static int enc_read();
-/*static int enc_puts(); */
-/*static int enc_gets(); */
-static long enc_ctrl();
-static int enc_new();
-static int enc_free();
-#endif
-
+static long enc_callback_ctrl(BIO *h, int cmd, bio_info_cb *fps);
#define ENC_BLOCK_SIZE (1024*4)
+#define BUF_OFFSET (EVP_MAX_BLOCK_LENGTH*2)
typedef struct enc_struct
{
int finished;
int ok; /* bad decrypt */
EVP_CIPHER_CTX cipher;
- char buf[ENC_BLOCK_SIZE+10];
+ /* buf is larger than ENC_BLOCK_SIZE because EVP_DecryptUpdate
+ * can return up to a block more data than is presented to it
+ */
+ char buf[ENC_BLOCK_SIZE+BUF_OFFSET+2];
} BIO_ENC_CTX;
static BIO_METHOD methods_enc=
enc_ctrl,
enc_new,
enc_free,
+ enc_callback_ctrl,
};
BIO_METHOD *BIO_f_cipher(void)
{
BIO_ENC_CTX *ctx;
- ctx=(BIO_ENC_CTX *)Malloc(sizeof(BIO_ENC_CTX));
- EVP_CIPHER_CTX_init(&ctx->cipher);
+ ctx=(BIO_ENC_CTX *)OPENSSL_malloc(sizeof(BIO_ENC_CTX));
if (ctx == NULL) return(0);
+ EVP_CIPHER_CTX_init(&ctx->cipher);
ctx->buf_len=0;
ctx->buf_off=0;
if (a == NULL) return(0);
b=(BIO_ENC_CTX *)a->ptr;
EVP_CIPHER_CTX_cleanup(&(b->cipher));
- memset(a->ptr,0,sizeof(BIO_ENC_CTX));
- Free(a->ptr);
+ OPENSSL_cleanse(a->ptr,sizeof(BIO_ENC_CTX));
+ OPENSSL_free(a->ptr);
a->ptr=NULL;
a->init=0;
a->flags=0;
{
if (ctx->cont <= 0) break;
- /* read in at offset 8, read the EVP_Cipher
+ /* read in at IV offset, read the EVP_Cipher
* documentation about why */
- i=BIO_read(b->next_bio,&(ctx->buf[8]),ENC_BLOCK_SIZE);
+ i=BIO_read(b->next_bio,&(ctx->buf[BUF_OFFSET]),ENC_BLOCK_SIZE);
if (i <= 0)
{
if (!BIO_should_retry(b->next_bio))
{
ctx->cont=i;
- i=EVP_CipherFinal(&(ctx->cipher),
+ i=EVP_CipherFinal_ex(&(ctx->cipher),
(unsigned char *)ctx->buf,
&(ctx->buf_len));
ctx->ok=i;
ctx->buf_off=0;
}
- else
+ else
+ {
ret=(ret == 0)?i:ret;
- break;
+ break;
+ }
}
else
{
- EVP_CipherUpdate(&(ctx->cipher),
+ if (!EVP_CipherUpdate(&(ctx->cipher),
(unsigned char *)ctx->buf,&ctx->buf_len,
- (unsigned char *)&(ctx->buf[8]),i);
+ (unsigned char *)&(ctx->buf[BUF_OFFSET]),i))
+ {
+ BIO_clear_retry_flags(b);
+ return 0;
+ }
ctx->cont=1;
+ /* Note: it is possible for EVP_CipherUpdate to
+ * decrypt zero bytes because this is or looks like
+ * the final block: if this happens we should retry
+ * and either read more data or decrypt the final
+ * block
+ */
+ if(ctx->buf_len == 0) continue;
}
if (ctx->buf_len <= outl)
i=ctx->buf_len;
else
i=outl;
-
if (i <= 0) break;
memcpy(out,ctx->buf,i);
ret+=i;
return((ret == 0)?ctx->cont:ret);
}
-static int enc_write(BIO *b, char *in, int inl)
+static int enc_write(BIO *b, const char *in, int inl)
{
int ret=0,n,i;
BIO_ENC_CTX *ctx;
while (inl > 0)
{
n=(inl > ENC_BLOCK_SIZE)?ENC_BLOCK_SIZE:inl;
- EVP_CipherUpdate(&(ctx->cipher),
+ if (!EVP_CipherUpdate(&(ctx->cipher),
(unsigned char *)ctx->buf,&ctx->buf_len,
- (unsigned char *)in,n);
+ (unsigned char *)in,n))
+ {
+ BIO_clear_retry_flags(b);
+ return 0;
+ }
inl-=n;
in+=n;
if (i <= 0)
{
BIO_copy_next_retry(b);
- return(i);
+ return (ret == inl) ? i : ret - inl;
}
n-=i;
ctx->buf_off+=i;
return(ret);
}
-static long enc_ctrl(BIO *b, int cmd, long num, char *ptr)
+static long enc_ctrl(BIO *b, int cmd, long num, void *ptr)
{
BIO *dbio;
BIO_ENC_CTX *ctx,*dctx;
case BIO_CTRL_RESET:
ctx->ok=1;
ctx->finished=0;
- EVP_CipherInit(&(ctx->cipher),NULL,NULL,NULL,
- ctx->cipher.encrypt);
+ if (!EVP_CipherInit_ex(&(ctx->cipher),NULL,NULL,NULL,NULL,
+ ctx->cipher.encrypt))
+ return 0;
ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
break;
case BIO_CTRL_EOF: /* More to read */
{
i=enc_write(b,NULL,0);
if (i < 0)
- {
- ret=i;
- break;
- }
+ return i;
}
if (!ctx->finished)
{
ctx->finished=1;
ctx->buf_off=0;
- ret=EVP_CipherFinal(&(ctx->cipher),
+ ret=EVP_CipherFinal_ex(&(ctx->cipher),
(unsigned char *)ctx->buf,
&(ctx->buf_len));
ctx->ok=(int)ret;
case BIO_CTRL_DUP:
dbio=(BIO *)ptr;
dctx=(BIO_ENC_CTX *)dbio->ptr;
- memcpy(&(dctx->cipher),&(ctx->cipher),sizeof(ctx->cipher));
- dbio->init=1;
+ EVP_CIPHER_CTX_init(&dctx->cipher);
+ ret = EVP_CIPHER_CTX_copy(&dctx->cipher,&ctx->cipher);
+ if (ret)
+ dbio->init=1;
break;
default:
ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
return(ret);
}
+static long enc_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);
+ }
+
/*
void BIO_set_cipher_ctx(b,c)
BIO *b;
}
*/
-void BIO_set_cipher(BIO *b, const EVP_CIPHER *c, unsigned char *k,
- unsigned char *i, int e)
+int BIO_set_cipher(BIO *b, const EVP_CIPHER *c, const unsigned char *k,
+ const unsigned char *i, int e)
{
BIO_ENC_CTX *ctx;
- if (b == NULL) return;
+ if (b == NULL) return 0;
if ((b->callback != NULL) &&
(b->callback(b,BIO_CB_CTRL,(const char *)c,BIO_CTRL_SET,e,0L) <= 0))
- return;
+ return 0;
b->init=1;
ctx=(BIO_ENC_CTX *)b->ptr;
- EVP_CipherInit(&(ctx->cipher),c,k,i,e);
+ if (!EVP_CipherInit_ex(&(ctx->cipher),c,NULL, k,i,e))
+ return 0;
if (b->callback != NULL)
- b->callback(b,BIO_CB_CTRL,(const char *)c,BIO_CTRL_SET,e,1L);
+ return b->callback(b,BIO_CB_CTRL,(const char *)c,BIO_CTRL_SET,e,1L);
+ return 1;
}
projects / openssl.git / blobdiff