-/* crypto/evp/bio_b64.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
+/*
+ * Copyright 1995-2016 The OpenSSL Project Authors. 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.]
+ * Licensed under the OpenSSL license (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 <stdio.h>
#include <errno.h>
-#include "cryptlib.h"
+#include "internal/cryptlib.h"
#include <openssl/buffer.h>
#include <openssl/evp.h>
+#include "internal/bio.h"
static int b64_write(BIO *h, const char *buf, int num);
static int b64_read(BIO *h, char *buf, int size);
-/*static int b64_puts(BIO *h, const char *str); */
-/*static int b64_gets(BIO *h, char *str, int size); */
+static int b64_puts(BIO *h, const char *str);
static long b64_ctrl(BIO *h, int cmd, long arg1, void *arg2);
static int b64_new(BIO *h);
static int b64_free(BIO *data);
-static long b64_callback_ctrl(BIO *h,int cmd,bio_info_cb *fp);
-#define B64_BLOCK_SIZE 1024
-#define B64_BLOCK_SIZE2 768
-#define B64_NONE 0
-#define B64_ENCODE 1
-#define B64_DECODE 2
-
-typedef struct b64_struct
- {
- /*BIO *bio; moved to the BIO structure */
- int buf_len;
- int buf_off;
- int tmp_len; /* used to find the start when decoding */
- int tmp_nl; /* If true, scan until '\n' */
- int encode;
- int start; /* have we started decoding yet? */
- int cont; /* <= 0 when finished */
- EVP_ENCODE_CTX base64;
- char buf[EVP_ENCODE_LENGTH(B64_BLOCK_SIZE)+10];
- char tmp[B64_BLOCK_SIZE];
- } BIO_B64_CTX;
-
-static BIO_METHOD methods_b64=
- {
- BIO_TYPE_BASE64,"base64 encoding",
- b64_write,
- b64_read,
- NULL, /* b64_puts, */
- NULL, /* b64_gets, */
- b64_ctrl,
- b64_new,
- b64_free,
- b64_callback_ctrl,
- };
-
-BIO_METHOD *BIO_f_base64(void)
- {
- return(&methods_b64);
- }
+static long b64_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp);
+#define B64_BLOCK_SIZE 1024
+#define B64_BLOCK_SIZE2 768
+#define B64_NONE 0
+#define B64_ENCODE 1
+#define B64_DECODE 2
+
+typedef struct b64_struct {
+ /*
+ * BIO *bio; moved to the BIO structure
+ */
+ int buf_len;
+ int buf_off;
+ int tmp_len; /* used to find the start when decoding */
+ int tmp_nl; /* If true, scan until '\n' */
+ int encode;
+ int start; /* have we started decoding yet? */
+ int cont; /* <= 0 when finished */
+ EVP_ENCODE_CTX *base64;
+ char buf[EVP_ENCODE_LENGTH(B64_BLOCK_SIZE) + 10];
+ char tmp[B64_BLOCK_SIZE];
+} BIO_B64_CTX;
+
+static const BIO_METHOD methods_b64 = {
+ BIO_TYPE_BASE64, "base64 encoding",
+ /* TODO: Convert to new style write function */
+ bwrite_conv,
+ b64_write,
+ /* TODO: Convert to new style read function */
+ bread_conv,
+ b64_read,
+ b64_puts,
+ NULL, /* b64_gets, */
+ b64_ctrl,
+ b64_new,
+ b64_free,
+ b64_callback_ctrl,
+};
+
+
+const BIO_METHOD *BIO_f_base64(void)
+{
+ return &methods_b64;
+}
static int b64_new(BIO *bi)
- {
- BIO_B64_CTX *ctx;
-
- ctx=(BIO_B64_CTX *)OPENSSL_malloc(sizeof(BIO_B64_CTX));
- if (ctx == NULL) return(0);
-
- ctx->buf_len=0;
- ctx->tmp_len=0;
- ctx->tmp_nl=0;
- ctx->buf_off=0;
- ctx->cont=1;
- ctx->start=1;
- ctx->encode=0;
-
- bi->init=1;
- bi->ptr=(char *)ctx;
- bi->flags=0;
- return(1);
- }
+{
+ BIO_B64_CTX *ctx;
+
+ ctx = OPENSSL_zalloc(sizeof(*ctx));
+ if (ctx == NULL)
+ return 0;
+
+ ctx->cont = 1;
+ ctx->start = 1;
+ ctx->base64 = EVP_ENCODE_CTX_new();
+ if (ctx->base64 == NULL) {
+ OPENSSL_free(ctx);
+ return 0;
+ }
+
+ BIO_set_data(bi, ctx);
+ BIO_set_init(bi, 1);
+
+ return 1;
+}
static int b64_free(BIO *a)
- {
- if (a == NULL) return(0);
- OPENSSL_free(a->ptr);
- a->ptr=NULL;
- a->init=0;
- a->flags=0;
- return(1);
- }
-
+{
+ BIO_B64_CTX *ctx;
+ if (a == NULL)
+ return 0;
+
+ ctx = BIO_get_data(a);
+ if (ctx == NULL)
+ return 0;
+
+ EVP_ENCODE_CTX_free(ctx->base64);
+ OPENSSL_free(ctx);
+ BIO_set_data(a, NULL);
+ BIO_set_init(a, 0);
+
+ return 1;
+}
+
static int b64_read(BIO *b, char *out, int outl)
- {
- int ret=0,i,ii,j,k,x,n,num,ret_code=0;
- BIO_B64_CTX *ctx;
- unsigned char *p,*q;
-
- if (out == NULL) return(0);
- ctx=(BIO_B64_CTX *)b->ptr;
-
- if ((ctx == NULL) || (b->next_bio == NULL)) return(0);
-
- if (ctx->encode != B64_DECODE)
- {
- ctx->encode=B64_DECODE;
- ctx->buf_len=0;
- ctx->buf_off=0;
- ctx->tmp_len=0;
- EVP_DecodeInit(&(ctx->base64));
- }
-
- /* First check if there are bytes decoded/encoded */
- if (ctx->buf_len > 0)
- {
- i=ctx->buf_len-ctx->buf_off;
- if (i > outl) i=outl;
- OPENSSL_assert(ctx->buf_off+i < (int)sizeof(ctx->buf));
- memcpy(out,&(ctx->buf[ctx->buf_off]),i);
- ret=i;
- out+=i;
- outl-=i;
- ctx->buf_off+=i;
- if (ctx->buf_len == ctx->buf_off)
- {
- ctx->buf_len=0;
- ctx->buf_off=0;
- }
- }
-
- /* At this point, we have room of outl bytes and an empty
- * buffer, so we should read in some more. */
-
- ret_code=0;
- while (outl > 0)
- {
-
- if (ctx->cont <= 0)
- break;
-
- i=BIO_read(b->next_bio,&(ctx->tmp[ctx->tmp_len]),
- B64_BLOCK_SIZE-ctx->tmp_len);
-
- if (i <= 0)
- {
- ret_code=i;
-
- /* Should be continue next time we are called? */
- if (!BIO_should_retry(b->next_bio))
- {
- ctx->cont=i;
- /* If buffer empty break */
- if(ctx->tmp_len == 0)
- break;
- /* Fall through and process what we have */
- else
- i = 0;
- }
- /* else we retry and add more data to buffer */
- else
- break;
- }
- i+=ctx->tmp_len;
- ctx->tmp_len = i;
-
- /* We need to scan, a line at a time until we
- * have a valid line if we are starting. */
- if (ctx->start && (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL))
- {
- /* ctx->start=1; */
- ctx->tmp_len=0;
- }
- else if (ctx->start)
- {
- q=p=(unsigned char *)ctx->tmp;
- for (j=0; j<i; j++)
- {
- if (*(q++) != '\n') continue;
-
- /* due to a previous very long line,
- * we need to keep on scanning for a '\n'
- * before we even start looking for
- * base64 encoded stuff. */
- if (ctx->tmp_nl)
- {
- p=q;
- ctx->tmp_nl=0;
- continue;
- }
-
- k=EVP_DecodeUpdate(&(ctx->base64),
- (unsigned char *)ctx->buf,
- &num,p,q-p);
- if ((k <= 0) && (num == 0) && (ctx->start))
- EVP_DecodeInit(&ctx->base64);
- else
- {
- if (p != (unsigned char *)
- &(ctx->tmp[0]))
- {
- i-=(p- (unsigned char *)
- &(ctx->tmp[0]));
- for (x=0; x < i; x++)
- ctx->tmp[x]=p[x];
- }
- EVP_DecodeInit(&ctx->base64);
- ctx->start=0;
- break;
- }
- p=q;
- }
-
- /* we fell off the end without starting */
- if (j == i)
- {
- /* Is this is one long chunk?, if so, keep on
- * reading until a new line. */
- if (p == (unsigned char *)&(ctx->tmp[0]))
- {
- /* Check buffer full */
- if (i == B64_BLOCK_SIZE)
- {
- ctx->tmp_nl=1;
- ctx->tmp_len=0;
- }
- }
- else if (p != q) /* finished on a '\n' */
- {
- n=q-p;
- for (ii=0; ii<n; ii++)
- ctx->tmp[ii]=p[ii];
- ctx->tmp_len=n;
- }
- /* else finished on a '\n' */
- continue;
- }
- else
- ctx->tmp_len=0;
- }
- /* If buffer isn't full and we can retry then
- * restart to read in more data.
- */
- else if ((i < B64_BLOCK_SIZE) && (ctx->cont > 0))
- continue;
-
- if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL)
- {
- int z,jj;
-
- jj=(i>>2)<<2;
- z=EVP_DecodeBlock((unsigned char *)ctx->buf,
- (unsigned char *)ctx->tmp,jj);
- if (jj > 2)
- {
- if (ctx->tmp[jj-1] == '=')
- {
- z--;
- if (ctx->tmp[jj-2] == '=')
- z--;
- }
- }
- /* z is now number of output bytes and jj is the
- * number consumed */
- if (jj != i)
- {
- memcpy((unsigned char *)ctx->tmp,
- (unsigned char *)&(ctx->tmp[jj]),i-jj);
- ctx->tmp_len=i-jj;
- }
- ctx->buf_len=0;
- if (z > 0)
- {
- ctx->buf_len=z;
- i=1;
- }
- else
- i=z;
- }
- else
- {
- i=EVP_DecodeUpdate(&(ctx->base64),
- (unsigned char *)ctx->buf,&ctx->buf_len,
- (unsigned char *)ctx->tmp,i);
- ctx->tmp_len = 0;
- }
- ctx->buf_off=0;
- if (i < 0)
- {
- ret_code=0;
- ctx->buf_len=0;
- break;
- }
-
- if (ctx->buf_len <= outl)
- i=ctx->buf_len;
- else
- i=outl;
-
- memcpy(out,ctx->buf,i);
- ret+=i;
- ctx->buf_off=i;
- if (ctx->buf_off == ctx->buf_len)
- {
- ctx->buf_len=0;
- ctx->buf_off=0;
- }
- outl-=i;
- out+=i;
- }
- BIO_clear_retry_flags(b);
- BIO_copy_next_retry(b);
- return((ret == 0)?ret_code:ret);
- }
+{
+ int ret = 0, i, ii, j, k, x, n, num, ret_code = 0;
+ BIO_B64_CTX *ctx;
+ unsigned char *p, *q;
+ BIO *next;
+
+ if (out == NULL)
+ return (0);
+ ctx = (BIO_B64_CTX *)BIO_get_data(b);
+
+ next = BIO_next(b);
+ if ((ctx == NULL) || (next == NULL))
+ return 0;
+
+ BIO_clear_retry_flags(b);
+
+ if (ctx->encode != B64_DECODE) {
+ ctx->encode = B64_DECODE;
+ ctx->buf_len = 0;
+ ctx->buf_off = 0;
+ ctx->tmp_len = 0;
+ EVP_DecodeInit(ctx->base64);
+ }
+
+ /* First check if there are bytes decoded/encoded */
+ if (ctx->buf_len > 0) {
+ OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
+ i = ctx->buf_len - ctx->buf_off;
+ if (i > outl)
+ i = outl;
+ OPENSSL_assert(ctx->buf_off + i < (int)sizeof(ctx->buf));
+ memcpy(out, &(ctx->buf[ctx->buf_off]), i);
+ ret = i;
+ out += i;
+ outl -= i;
+ ctx->buf_off += i;
+ if (ctx->buf_len == ctx->buf_off) {
+ ctx->buf_len = 0;
+ ctx->buf_off = 0;
+ }
+ }
+
+ /*
+ * At this point, we have room of outl bytes and an empty buffer, so we
+ * should read in some more.
+ */
+
+ ret_code = 0;
+ while (outl > 0) {
+ if (ctx->cont <= 0)
+ break;
+
+ i = BIO_read(next, &(ctx->tmp[ctx->tmp_len]),
+ B64_BLOCK_SIZE - ctx->tmp_len);
+
+ if (i <= 0) {
+ ret_code = i;
+
+ /* Should we continue next time we are called? */
+ if (!BIO_should_retry(next)) {
+ ctx->cont = i;
+ /* If buffer empty break */
+ if (ctx->tmp_len == 0)
+ break;
+ /* Fall through and process what we have */
+ else
+ i = 0;
+ }
+ /* else we retry and add more data to buffer */
+ else
+ break;
+ }
+ i += ctx->tmp_len;
+ ctx->tmp_len = i;
+
+ /*
+ * We need to scan, a line at a time until we have a valid line if we
+ * are starting.
+ */
+ if (ctx->start && (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL)) {
+ /* ctx->start=1; */
+ ctx->tmp_len = 0;
+ } else if (ctx->start) {
+ q = p = (unsigned char *)ctx->tmp;
+ num = 0;
+ for (j = 0; j < i; j++) {
+ if (*(q++) != '\n')
+ continue;
+
+ /*
+ * due to a previous very long line, we need to keep on
+ * scanning for a '\n' before we even start looking for
+ * base64 encoded stuff.
+ */
+ if (ctx->tmp_nl) {
+ p = q;
+ ctx->tmp_nl = 0;
+ continue;
+ }
+
+ k = EVP_DecodeUpdate(ctx->base64,
+ (unsigned char *)ctx->buf,
+ &num, p, q - p);
+ if ((k <= 0) && (num == 0) && (ctx->start))
+ EVP_DecodeInit(ctx->base64);
+ else {
+ if (p != (unsigned char *)
+ &(ctx->tmp[0])) {
+ i -= (p - (unsigned char *)
+ &(ctx->tmp[0]));
+ for (x = 0; x < i; x++)
+ ctx->tmp[x] = p[x];
+ }
+ EVP_DecodeInit(ctx->base64);
+ ctx->start = 0;
+ break;
+ }
+ p = q;
+ }
+
+ /* we fell off the end without starting */
+ if ((j == i) && (num == 0)) {
+ /*
+ * Is this is one long chunk?, if so, keep on reading until a
+ * new line.
+ */
+ if (p == (unsigned char *)&(ctx->tmp[0])) {
+ /* Check buffer full */
+ if (i == B64_BLOCK_SIZE) {
+ ctx->tmp_nl = 1;
+ ctx->tmp_len = 0;
+ }
+ } else if (p != q) { /* finished on a '\n' */
+ n = q - p;
+ for (ii = 0; ii < n; ii++)
+ ctx->tmp[ii] = p[ii];
+ ctx->tmp_len = n;
+ }
+ /* else finished on a '\n' */
+ continue;
+ } else {
+ ctx->tmp_len = 0;
+ }
+ } else if ((i < B64_BLOCK_SIZE) && (ctx->cont > 0)) {
+ /*
+ * If buffer isn't full and we can retry then restart to read in
+ * more data.
+ */
+ continue;
+ }
+
+ if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL) {
+ int z, jj;
+
+ jj = i & ~3; /* process per 4 */
+ z = EVP_DecodeBlock((unsigned char *)ctx->buf,
+ (unsigned char *)ctx->tmp, jj);
+ if (jj > 2) {
+ if (ctx->tmp[jj - 1] == '=') {
+ z--;
+ if (ctx->tmp[jj - 2] == '=')
+ z--;
+ }
+ }
+ /*
+ * z is now number of output bytes and jj is the number consumed
+ */
+ if (jj != i) {
+ memmove(ctx->tmp, &ctx->tmp[jj], i - jj);
+ ctx->tmp_len = i - jj;
+ }
+ ctx->buf_len = 0;
+ if (z > 0) {
+ ctx->buf_len = z;
+ }
+ i = z;
+ } else {
+ i = EVP_DecodeUpdate(ctx->base64,
+ (unsigned char *)ctx->buf, &ctx->buf_len,
+ (unsigned char *)ctx->tmp, i);
+ ctx->tmp_len = 0;
+ }
+ ctx->buf_off = 0;
+ if (i < 0) {
+ ret_code = 0;
+ ctx->buf_len = 0;
+ break;
+ }
+
+ if (ctx->buf_len <= outl)
+ i = ctx->buf_len;
+ else
+ i = outl;
+
+ memcpy(out, ctx->buf, i);
+ ret += i;
+ ctx->buf_off = i;
+ if (ctx->buf_off == ctx->buf_len) {
+ ctx->buf_len = 0;
+ ctx->buf_off = 0;
+ }
+ outl -= i;
+ out += i;
+ }
+ /* BIO_clear_retry_flags(b); */
+ BIO_copy_next_retry(b);
+ return ((ret == 0) ? ret_code : ret);
+}
static int b64_write(BIO *b, const char *in, int inl)
- {
- int ret=inl,n,i;
- BIO_B64_CTX *ctx;
-
- ctx=(BIO_B64_CTX *)b->ptr;
- BIO_clear_retry_flags(b);
-
- if (ctx->encode != B64_ENCODE)
- {
- ctx->encode=B64_ENCODE;
- ctx->buf_len=0;
- ctx->buf_off=0;
- ctx->tmp_len=0;
- EVP_EncodeInit(&(ctx->base64));
- }
-
- 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 */
- ctx->buf_off=0;
- ctx->buf_len=0;
-
- if ((in == NULL) || (inl <= 0)) return(0);
-
- while (inl > 0)
- {
- n=(inl > B64_BLOCK_SIZE)?B64_BLOCK_SIZE:inl;
-
- if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL)
- {
- if (ctx->tmp_len > 0)
- {
- n=3-ctx->tmp_len;
- /* There's a teoretical possibility for this */
- if (n > inl)
- n=inl;
- memcpy(&(ctx->tmp[ctx->tmp_len]),in,n);
- ctx->tmp_len+=n;
- if (ctx->tmp_len < 3)
- break;
- ctx->buf_len=EVP_EncodeBlock(
- (unsigned char *)ctx->buf,
- (unsigned char *)ctx->tmp,
- ctx->tmp_len);
- /* Since we're now done using the temporary
- buffer, the length should be 0'd */
- ctx->tmp_len=0;
- }
- else
- {
- if (n < 3)
- {
- memcpy(&(ctx->tmp[0]),in,n);
- ctx->tmp_len=n;
- break;
- }
- n-=n%3;
- ctx->buf_len=EVP_EncodeBlock(
- (unsigned char *)ctx->buf,
- (unsigned char *)in,n);
- }
- }
- else
- {
- EVP_EncodeUpdate(&(ctx->base64),
- (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((ret == 0)?i:ret);
- }
- n-=i;
- ctx->buf_off+=i;
- }
- ctx->buf_len=0;
- ctx->buf_off=0;
- }
- return(ret);
- }
+{
+ int ret = 0;
+ int n;
+ int i;
+ BIO_B64_CTX *ctx;
+ BIO *next;
+
+ ctx = (BIO_B64_CTX *)BIO_get_data(b);
+ next = BIO_next(b);
+ if ((ctx == NULL) || (next == NULL))
+ return 0;
+
+ BIO_clear_retry_flags(b);
+
+ if (ctx->encode != B64_ENCODE) {
+ ctx->encode = B64_ENCODE;
+ ctx->buf_len = 0;
+ ctx->buf_off = 0;
+ ctx->tmp_len = 0;
+ EVP_EncodeInit(ctx->base64);
+ }
+
+ OPENSSL_assert(ctx->buf_off < (int)sizeof(ctx->buf));
+ OPENSSL_assert(ctx->buf_len <= (int)sizeof(ctx->buf));
+ OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
+ n = ctx->buf_len - ctx->buf_off;
+ while (n > 0) {
+ i = BIO_write(next, &(ctx->buf[ctx->buf_off]), n);
+ if (i <= 0) {
+ BIO_copy_next_retry(b);
+ return (i);
+ }
+ OPENSSL_assert(i <= n);
+ ctx->buf_off += i;
+ OPENSSL_assert(ctx->buf_off <= (int)sizeof(ctx->buf));
+ OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
+ n -= i;
+ }
+ /* at this point all pending data has been written */
+ ctx->buf_off = 0;
+ ctx->buf_len = 0;
+
+ if ((in == NULL) || (inl <= 0))
+ return (0);
+
+ while (inl > 0) {
+ n = (inl > B64_BLOCK_SIZE) ? B64_BLOCK_SIZE : inl;
+
+ if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL) {
+ if (ctx->tmp_len > 0) {
+ OPENSSL_assert(ctx->tmp_len <= 3);
+ n = 3 - ctx->tmp_len;
+ /*
+ * There's a theoretical possibility for this
+ */
+ if (n > inl)
+ n = inl;
+ memcpy(&(ctx->tmp[ctx->tmp_len]), in, n);
+ ctx->tmp_len += n;
+ ret += n;
+ if (ctx->tmp_len < 3)
+ break;
+ ctx->buf_len =
+ EVP_EncodeBlock((unsigned char *)ctx->buf,
+ (unsigned char *)ctx->tmp, ctx->tmp_len);
+ OPENSSL_assert(ctx->buf_len <= (int)sizeof(ctx->buf));
+ OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
+ /*
+ * Since we're now done using the temporary buffer, the
+ * length should be 0'd
+ */
+ ctx->tmp_len = 0;
+ } else {
+ if (n < 3) {
+ memcpy(ctx->tmp, in, n);
+ ctx->tmp_len = n;
+ ret += n;
+ break;
+ }
+ n -= n % 3;
+ ctx->buf_len =
+ EVP_EncodeBlock((unsigned char *)ctx->buf,
+ (const unsigned char *)in, n);
+ OPENSSL_assert(ctx->buf_len <= (int)sizeof(ctx->buf));
+ OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
+ ret += n;
+ }
+ } else {
+ if (!EVP_EncodeUpdate(ctx->base64,
+ (unsigned char *)ctx->buf, &ctx->buf_len,
+ (unsigned char *)in, n))
+ return ((ret == 0) ? -1 : ret);
+ OPENSSL_assert(ctx->buf_len <= (int)sizeof(ctx->buf));
+ OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
+ ret += n;
+ }
+ inl -= n;
+ in += n;
+
+ ctx->buf_off = 0;
+ n = ctx->buf_len;
+ while (n > 0) {
+ i = BIO_write(next, &(ctx->buf[ctx->buf_off]), n);
+ if (i <= 0) {
+ BIO_copy_next_retry(b);
+ return ((ret == 0) ? i : ret);
+ }
+ OPENSSL_assert(i <= n);
+ n -= i;
+ ctx->buf_off += i;
+ OPENSSL_assert(ctx->buf_off <= (int)sizeof(ctx->buf));
+ OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
+ }
+ ctx->buf_len = 0;
+ ctx->buf_off = 0;
+ }
+ return (ret);
+}
static long b64_ctrl(BIO *b, int cmd, long num, void *ptr)
- {
- BIO_B64_CTX *ctx;
- long ret=1;
- int i;
-
- ctx=(BIO_B64_CTX *)b->ptr;
-
- switch (cmd)
- {
- case BIO_CTRL_RESET:
- ctx->cont=1;
- ctx->start=1;
- ctx->encode=B64_NONE;
- 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: /* More to write in buffer */
- ret=ctx->buf_len-ctx->buf_off;
- if ((ret == 0) && (ctx->encode != B64_NONE)
- && (ctx->base64.num != 0))
- ret=1;
- else 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=b64_write(b,NULL,0);
- if (i < 0)
- return i;
- }
- if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL)
- {
- if (ctx->tmp_len != 0)
- {
- ctx->buf_len=EVP_EncodeBlock(
- (unsigned char *)ctx->buf,
- (unsigned char *)ctx->tmp,
- ctx->tmp_len);
- ctx->buf_off=0;
- ctx->tmp_len=0;
- goto again;
- }
- }
- else if (ctx->encode != B64_NONE && ctx->base64.num != 0)
- {
- ctx->buf_off=0;
- EVP_EncodeFinal(&(ctx->base64),
- (unsigned char *)ctx->buf,
- &(ctx->buf_len));
- /* push out the bytes */
- goto again;
- }
- /* 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_DUP:
- break;
- case BIO_CTRL_INFO:
- case BIO_CTRL_GET:
- case BIO_CTRL_SET:
- default:
- ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
- break;
- }
- return(ret);
- }
+{
+ BIO_B64_CTX *ctx;
+ long ret = 1;
+ int i;
+ BIO *next;
+
+ ctx = (BIO_B64_CTX *)BIO_get_data(b);
+ next = BIO_next(b);
+ if ((ctx == NULL) || (next == NULL))
+ return 0;
+
+ switch (cmd) {
+ case BIO_CTRL_RESET:
+ ctx->cont = 1;
+ ctx->start = 1;
+ ctx->encode = B64_NONE;
+ ret = BIO_ctrl(next, cmd, num, ptr);
+ break;
+ case BIO_CTRL_EOF: /* More to read */
+ if (ctx->cont <= 0)
+ ret = 1;
+ else
+ ret = BIO_ctrl(next, cmd, num, ptr);
+ break;
+ case BIO_CTRL_WPENDING: /* More to write in buffer */
+ OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
+ ret = ctx->buf_len - ctx->buf_off;
+ if ((ret == 0) && (ctx->encode != B64_NONE)
+ && (EVP_ENCODE_CTX_num(ctx->base64) != 0))
+ ret = 1;
+ else if (ret <= 0)
+ ret = BIO_ctrl(next, cmd, num, ptr);
+ break;
+ case BIO_CTRL_PENDING: /* More to read in buffer */
+ OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
+ ret = ctx->buf_len - ctx->buf_off;
+ if (ret <= 0)
+ ret = BIO_ctrl(next, cmd, num, ptr);
+ break;
+ case BIO_CTRL_FLUSH:
+ /* do a final write */
+ again:
+ while (ctx->buf_len != ctx->buf_off) {
+ i = b64_write(b, NULL, 0);
+ if (i < 0)
+ return i;
+ }
+ if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL) {
+ if (ctx->tmp_len != 0) {
+ ctx->buf_len = EVP_EncodeBlock((unsigned char *)ctx->buf,
+ (unsigned char *)ctx->tmp,
+ ctx->tmp_len);
+ ctx->buf_off = 0;
+ ctx->tmp_len = 0;
+ goto again;
+ }
+ } else if (ctx->encode != B64_NONE
+ && EVP_ENCODE_CTX_num(ctx->base64) != 0) {
+ ctx->buf_off = 0;
+ EVP_EncodeFinal(ctx->base64,
+ (unsigned char *)ctx->buf, &(ctx->buf_len));
+ /* push out the bytes */
+ goto again;
+ }
+ /* Finally flush the underlying BIO */
+ ret = BIO_ctrl(next, cmd, num, ptr);
+ break;
+
+ case BIO_C_DO_STATE_MACHINE:
+ BIO_clear_retry_flags(b);
+ ret = BIO_ctrl(next, cmd, num, ptr);
+ BIO_copy_next_retry(b);
+ break;
+
+ case BIO_CTRL_DUP:
+ break;
+ case BIO_CTRL_INFO:
+ case BIO_CTRL_GET:
+ case BIO_CTRL_SET:
+ default:
+ ret = BIO_ctrl(next, cmd, num, ptr);
+ break;
+ }
+ return ret;
+}
static long b64_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);
- }
-
+{
+ long ret = 1;
+ BIO *next = BIO_next(b);
+
+ if (next == NULL)
+ return 0;
+ switch (cmd) {
+ default:
+ ret = BIO_callback_ctrl(next, cmd, fp);
+ break;
+ }
+ return (ret);
+}
+
+static int b64_puts(BIO *b, const char *str)
+{
+ return b64_write(b, str, strlen(str));
+}
projects / openssl.git / blobdiff