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Diffstat (limited to 'main/openssl/crypto/pkcs7/bio_ber.c')
-rw-r--r--main/openssl/crypto/pkcs7/bio_ber.c466
1 files changed, 466 insertions, 0 deletions
diff --git a/main/openssl/crypto/pkcs7/bio_ber.c b/main/openssl/crypto/pkcs7/bio_ber.c
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+++ b/main/openssl/crypto/pkcs7/bio_ber.c
@@ -0,0 +1,466 @@
+/* crypto/evp/bio_ber.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 <stdio.h>
+#include <errno.h>
+#include "cryptlib.h"
+#include <openssl/buffer.h>
+#include <openssl/evp.h>
+
+static int ber_write(BIO *h,char *buf,int num);
+static int ber_read(BIO *h,char *buf,int size);
+/*static int ber_puts(BIO *h,char *str); */
+/*static int ber_gets(BIO *h,char *str,int size); */
+static long ber_ctrl(BIO *h,int cmd,long arg1,char *arg2);
+static int ber_new(BIO *h);
+static int ber_free(BIO *data);
+static long ber_callback_ctrl(BIO *h,int cmd,void *(*fp)());
+#define BER_BUF_SIZE (32)
+
+/* This is used to hold the state of the BER objects being read. */
+typedef struct ber_struct
+ {
+ int tag;
+ int class;
+ long length;
+ int inf;
+ int num_left;
+ int depth;
+ } BER_CTX;
+
+typedef struct bio_ber_struct
+ {
+ int tag;
+ int class;
+ long length;
+ int inf;
+
+ /* most of the following are used when doing non-blocking IO */
+ /* reading */
+ long num_left; /* number of bytes still to read/write in block */
+ int depth; /* used with indefinite encoding. */
+ int finished; /* No more read data */
+
+ /* writting */
+ char *w_addr;
+ int w_offset;
+ int w_left;
+
+ int buf_len;
+ int buf_off;
+ unsigned char buf[BER_BUF_SIZE];
+ } BIO_BER_CTX;
+
+static BIO_METHOD methods_ber=
+ {
+ BIO_TYPE_CIPHER,"cipher",
+ ber_write,
+ ber_read,
+ NULL, /* ber_puts, */
+ NULL, /* ber_gets, */
+ ber_ctrl,
+ ber_new,
+ ber_free,
+ ber_callback_ctrl,
+ };
+
+BIO_METHOD *BIO_f_ber(void)
+ {
+ return(&methods_ber);
+ }
+
+static int ber_new(BIO *bi)
+ {
+ BIO_BER_CTX *ctx;
+
+ ctx=(BIO_BER_CTX *)OPENSSL_malloc(sizeof(BIO_BER_CTX));
+ if (ctx == NULL) return(0);
+
+ memset((char *)ctx,0,sizeof(BIO_BER_CTX));
+
+ bi->init=0;
+ bi->ptr=(char *)ctx;
+ bi->flags=0;
+ return(1);
+ }
+
+static int ber_free(BIO *a)
+ {
+ BIO_BER_CTX *b;
+
+ if (a == NULL) return(0);
+ b=(BIO_BER_CTX *)a->ptr;
+ OPENSSL_cleanse(a->ptr,sizeof(BIO_BER_CTX));
+ OPENSSL_free(a->ptr);
+ a->ptr=NULL;
+ a->init=0;
+ a->flags=0;
+ return(1);
+ }
+
+int bio_ber_get_header(BIO *bio, BIO_BER_CTX *ctx)
+ {
+ char buf[64];
+ int i,j,n;
+ int ret;
+ unsigned char *p;
+ unsigned long length
+ int tag;
+ int class;
+ long max;
+
+ BIO_clear_retry_flags(b);
+
+ /* Pack the buffer down if there is a hole at the front */
+ if (ctx->buf_off != 0)
+ {
+ p=ctx->buf;
+ j=ctx->buf_off;
+ n=ctx->buf_len-j;
+ for (i=0; i<n; i++)
+ {
+ p[0]=p[j];
+ p++;
+ }
+ ctx->buf_len-j;
+ ctx->buf_off=0;
+ }
+
+ /* If there is more room, read some more data */
+ i=BER_BUF_SIZE-ctx->buf_len;
+ if (i)
+ {
+ i=BIO_read(bio->next_bio,&(ctx->buf[ctx->buf_len]),i);
+ if (i <= 0)
+ {
+ BIO_copy_next_retry(b);
+ return(i);
+ }
+ else
+ ctx->buf_len+=i;
+ }
+
+ max=ctx->buf_len;
+ p=ctx->buf;
+ ret=ASN1_get_object(&p,&length,&tag,&class,max);
+
+ if (ret & 0x80)
+ {
+ if ((ctx->buf_len < BER_BUF_SIZE) &&
+ (ERR_GET_REASON(ERR_peek_error()) == ASN1_R_TOO_LONG))
+ {
+ ERR_clear_error(); /* clear the error */
+ BIO_set_retry_read(b);
+ }
+ return(-1);
+ }
+
+ /* We have no error, we have a header, so make use of it */
+
+ if ((ctx->tag >= 0) && (ctx->tag != tag))
+ {
+ BIOerr(BIO_F_BIO_BER_GET_HEADER,BIO_R_TAG_MISMATCH);
+ sprintf(buf,"tag=%d, got %d",ctx->tag,tag);
+ ERR_add_error_data(1,buf);
+ return(-1);
+ }
+ if (ret & 0x01)
+ if (ret & V_ASN1_CONSTRUCTED)
+ }
+
+static int ber_read(BIO *b, char *out, int outl)
+ {
+ int ret=0,i,n;
+ BIO_BER_CTX *ctx;
+
+ BIO_clear_retry_flags(b);
+
+ if (out == NULL) return(0);
+ ctx=(BIO_BER_CTX *)b->ptr;
+
+ if ((ctx == NULL) || (b->next_bio == NULL)) return(0);
+
+ if (ctx->finished) return(0);
+
+again:
+ /* First see if we are half way through reading a block */
+ if (ctx->num_left > 0)
+ {
+ if (ctx->num_left < outl)
+ n=ctx->num_left;
+ else
+ n=outl;
+ i=BIO_read(b->next_bio,out,n);
+ if (i <= 0)
+ {
+ BIO_copy_next_retry(b);
+ return(i);
+ }
+ ctx->num_left-=i;
+ outl-=i;
+ ret+=i;
+ if (ctx->num_left <= 0)
+ {
+ ctx->depth--;
+ if (ctx->depth <= 0)
+ ctx->finished=1;
+ }
+ if (outl <= 0)
+ return(ret);
+ else
+ goto again;
+ }
+ else /* we need to read another BER header */
+ {
+ }
+ }
+
+static int ber_write(BIO *b, char *in, int inl)
+ {
+ int ret=0,n,i;
+ BIO_ENC_CTX *ctx;
+
+ ctx=(BIO_ENC_CTX *)b->ptr;
+ ret=inl;
+
+ BIO_clear_retry_flags(b);
+ n=ctx->buf_len-ctx->buf_off;
+ while (n > 0)
+ {
+ i=BIO_write(b->next_bio,&(ctx->buf[ctx->buf_off]),n);
+ if (i <= 0)
+ {
+ BIO_copy_next_retry(b);
+ return(i);
+ }
+ ctx->buf_off+=i;
+ n-=i;
+ }
+ /* at this point all pending data has been written */
+
+ if ((in == NULL) || (inl <= 0)) return(0);
+
+ ctx->buf_off=0;
+ while (inl > 0)
+ {
+ n=(inl > ENC_BLOCK_SIZE)?ENC_BLOCK_SIZE:inl;
+ EVP_CipherUpdate(&(ctx->cipher),
+ (unsigned char *)ctx->buf,&ctx->buf_len,
+ (unsigned char *)in,n);
+ inl-=n;
+ in+=n;
+
+ ctx->buf_off=0;
+ n=ctx->buf_len;
+ while (n > 0)
+ {
+ i=BIO_write(b->next_bio,&(ctx->buf[ctx->buf_off]),n);
+ if (i <= 0)
+ {
+ BIO_copy_next_retry(b);
+ return(i);
+ }
+ n-=i;
+ ctx->buf_off+=i;
+ }
+ ctx->buf_len=0;
+ ctx->buf_off=0;
+ }
+ BIO_copy_next_retry(b);
+ return(ret);
+ }
+
+static long ber_ctrl(BIO *b, int cmd, long num, char *ptr)
+ {
+ BIO *dbio;
+ BIO_ENC_CTX *ctx,*dctx;
+ long ret=1;
+ int i;
+
+ ctx=(BIO_ENC_CTX *)b->ptr;
+
+ switch (cmd)
+ {
+ case BIO_CTRL_RESET:
+ ctx->ok=1;
+ ctx->finished=0;
+ EVP_CipherInit_ex(&(ctx->cipher),NULL,NULL,NULL,NULL,
+ ctx->cipher.berrypt);
+ 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_WPENDING:
+ ret=ctx->buf_len-ctx->buf_off;
+ if (ret <= 0)
+ ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
+ break;
+ case BIO_CTRL_PENDING: /* More to read in buffer */
+ ret=ctx->buf_len-ctx->buf_off;
+ if (ret <= 0)
+ ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
+ break;
+ case BIO_CTRL_FLUSH:
+ /* do a final write */
+again:
+ while (ctx->buf_len != ctx->buf_off)
+ {
+ i=ber_write(b,NULL,0);
+ if (i < 0)
+ {
+ ret=i;
+ break;
+ }
+ }
+
+ if (!ctx->finished)
+ {
+ ctx->finished=1;
+ ctx->buf_off=0;
+ ret=EVP_CipherFinal_ex(&(ctx->cipher),
+ (unsigned char *)ctx->buf,
+ &(ctx->buf_len));
+ ctx->ok=(int)ret;
+ if (ret <= 0) break;
+
+ /* push out the bytes */
+ goto again;
+ }
+
+ /* Finally flush the underlying BIO */
+ ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
+ break;
+ case BIO_C_GET_CIPHER_STATUS:
+ ret=(long)ctx->ok;
+ 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_DUP:
+ dbio=(BIO *)ptr;
+ dctx=(BIO_ENC_CTX *)dbio->ptr;
+ memcpy(&(dctx->cipher),&(ctx->cipher),sizeof(ctx->cipher));
+ dbio->init=1;
+ break;
+ default:
+ ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
+ break;
+ }
+ return(ret);
+ }
+
+static long ber_callback_ctrl(BIO *b, int cmd, void *(*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;
+EVP_CIPHER_ctx *c;
+ {
+ if (b == NULL) return;
+
+ if ((b->callback != NULL) &&
+ (b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,0L) <= 0))
+ return;
+
+ b->init=1;
+ ctx=(BIO_ENC_CTX *)b->ptr;
+ memcpy(ctx->cipher,c,sizeof(EVP_CIPHER_CTX));
+
+ if (b->callback != NULL)
+ b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,1L);
+ }
+*/
+
+void BIO_set_cipher(BIO *b, EVP_CIPHER *c, unsigned char *k, unsigned char *i,
+ int e)
+ {
+ BIO_ENC_CTX *ctx;
+
+ if (b == NULL) return;
+
+ if ((b->callback != NULL) &&
+ (b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,0L) <= 0))
+ return;
+
+ b->init=1;
+ ctx=(BIO_ENC_CTX *)b->ptr;
+ EVP_CipherInit_ex(&(ctx->cipher),c,NULL,k,i,e);
+
+ if (b->callback != NULL)
+ b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,1L);
+ }
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 07:55:58 +0000