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-rw-r--r--src/Makefile.am2
-rw-r--r--src/b64dec.c43
-rw-r--r--src/b64enc.c228
-rw-r--r--src/gpg-error.def.in4
-rw-r--r--src/gpg-error.h.in14
-rw-r--r--src/gpg-error.vers5
-rw-r--r--src/gpgrt-int.h26
-rw-r--r--src/visibility.c18
-rw-r--r--src/visibility.h6
9 files changed, 184 insertions, 162 deletions
diff --git a/src/Makefile.am b/src/Makefile.am
index 66c4414..42998e4 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -190,7 +190,7 @@ libgpg_error_la_SOURCES = gettext.h $(arch_sources) \
sysutils.c \
syscall-clamp.c \
logging.c \
- b64dec.c \
+ b64dec.c b64enc.c \
argparse.c
diff --git a/src/b64dec.c b/src/b64dec.c
index a8a8351..1235406 100644
--- a/src/b64dec.c
+++ b/src/b64dec.c
@@ -2,7 +2,7 @@
* Copyright (C) 2008, 2011 Free Software Foundation, Inc.
* Copyright (C) 2008, 2011, 2016 g10 Code GmbH
*
- * This file is part of GnuPG.
+ * This file is part of Libgpg-error.
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
@@ -16,26 +16,18 @@
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, see <https://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ *
+ * This file was originally a part of GnuPG.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <assert.h>
#include "gpgrt-int.h"
-struct _gpgrt_b64state
-{
- int idx;
- int quad_count;
- char *title;
- unsigned char radbuf[4];
- int stop_seen:1;
- int invalid_encoding:1;
- gpg_error_t lasterr;
-};
/* The reverse base-64 list used for base-64 decoding. */
static unsigned char const asctobin[128] =
@@ -79,15 +71,15 @@ _gpgrt_b64dec_start (const char *title)
if (title)
{
- t = strdup (title);
+ t = xtrystrdup (title);
if (!t)
return NULL;
}
- state = calloc (1, sizeof (struct _gpgrt_b64state));
+ state = xtrycalloc (1, sizeof (struct _gpgrt_b64state));
if (!state)
{
- free (t);
+ xfree (t);
return NULL;
}
@@ -99,13 +91,15 @@ _gpgrt_b64dec_start (const char *title)
else
state->idx = s_b64_0;
+ state->using_decoder = 1;
+
return state;
}
/* Do in-place decoding of base-64 data of LENGTH in BUFFER. Stores the
new length of the buffer at R_NBYTES. */
-gpg_error_t
+gpg_err_code_t
_gpgrt_b64dec_proc (gpgrt_b64state_t state, void *buffer, size_t length,
size_t *r_nbytes)
{
@@ -120,8 +114,8 @@ _gpgrt_b64dec_proc (gpgrt_b64state_t state, void *buffer, size_t length,
if (state->stop_seen)
{
*r_nbytes = 0;
- state->lasterr = gpg_error (GPG_ERR_EOF);
- free (state->title);
+ state->lasterr = GPG_ERR_EOF;
+ xfree (state->title);
state->title = NULL;
return state->lasterr;
}
@@ -247,7 +241,7 @@ _gpgrt_b64dec_proc (gpgrt_b64state_t state, void *buffer, size_t length,
state->stop_seen = 1;
break;
default:
- assert (!"invalid state");
+ gpgrt_assert (!"invalid state");
}
}
@@ -262,17 +256,22 @@ _gpgrt_b64dec_proc (gpgrt_b64state_t state, void *buffer, size_t length,
/* Return an error code in case an encoding error has been found
during decoding. */
-gpg_error_t
+gpg_err_code_t
_gpgrt_b64dec_finish (gpgrt_b64state_t state)
{
gpg_error_t err;
- if (state->lasterr)
+ if (!state)
+ return 0; /* Already released. */
+
+ if (!state->using_decoder)
+ err = GPG_ERR_CONFLICT; /* State was allocated for the encoder. */
+ else if (state->lasterr)
err = state->lasterr;
else
{
free (state->title);
- err = state->invalid_encoding? gpg_error(GPG_ERR_BAD_DATA): 0;
+ err = state->invalid_encoding? GPG_ERR_BAD_DATA : 0;
}
free (state);
diff --git a/src/b64enc.c b/src/b64enc.c
index 91960c7..571f4ec 100644
--- a/src/b64enc.c
+++ b/src/b64enc.c
@@ -2,9 +2,9 @@
* Copyright (C) 2001, 2003, 2004, 2008, 2010,
* 2011 Free Software Foundation, Inc.
* Copyright (C) 2001, 2003, 2004, 2008, 2010,
- * 2011 g10 Code GmbH
+ * 2011, 2018 g10 Code GmbH
*
- * This file is part of GnuPG.
+ * This file is part of Libgpg-error.
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
@@ -18,17 +18,20 @@
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, see <https://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ *
+ * This file was originally a part of GnuPG.
*/
#include <config.h>
#include <stdio.h>
+#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
-#include <assert.h>
-#include "i18n.h"
-#include "util.h"
+#include "gpgrt-int.h"
+
#define B64ENC_DID_HEADER 1
#define B64ENC_DID_TRAILER 2
@@ -36,9 +39,9 @@
#define B64ENC_USE_PGPCRC 32
/* The base-64 character list */
-static unsigned char bintoasc[64] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
- "abcdefghijklmnopqrstuvwxyz"
- "0123456789+/";
+static unsigned char const bintoasc[64] = ("ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+ "abcdefghijklmnopqrstuvwxyz"
+ "0123456789+/");
/* Stuff required to create the OpenPGP CRC. This crc_table has been
created using this code:
@@ -92,7 +95,7 @@ static unsigned char bintoasc[64] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
}
*/
#define CRCINIT 0xB704CE
-static const u32 crc_table[256] = {
+static const uint32_t crc_table[256] = {
0x00000000, 0x00864cfb, 0x018ad50d, 0x010c99f6, 0x0393e6e1, 0x0315aa1a,
0x021933ec, 0x029f7f17, 0x07a18139, 0x0727cdc2, 0x062b5434, 0x06ad18cf,
0x043267d8, 0x04b42b23, 0x05b8b2d5, 0x053efe2e, 0x0fc54e89, 0x0f430272,
@@ -139,14 +142,28 @@ static const u32 crc_table[256] = {
};
-static gpg_error_t
-enc_start (struct b64state *state, FILE *fp, estream_t stream,
- const char *title)
+/* Prepare for Base-64 writing to STREAM. If TITLE is not NULL and
+ * not an empty string, that string will be used as the title for the
+ * armor lines, with TITLE being an empty string, we don't write the
+ * header lines and furthermore even don't write any linefeeds. If
+ * TITLE starts with "PGP " the OpenPGP CRC checksum will be written
+ * as well. With TITLE being NULL, we merely don't write header but
+ * make sure that lines are not too long. Note, that we don't write
+ * anything unless at least one byte is written using b64enc_write.
+ * On success an enoder object is returned which needs to be released
+ * using _gpgrt_b64dec_finish. On error NULL is returned an ERRNO is
+ * set.
+ */
+gpgrt_b64state_t
+_gpgrt_b64enc_start (estream_t stream, const char *title)
{
- memset (state, 0, sizeof *state);
- state->fp = fp;
+ gpgrt_b64state_t state;
+
+ state = xtrycalloc (1, sizeof *state);
+ if (!state)
+ return NULL;
+
state->stream = stream;
- state->lasterr = 0;
if (title && !*title)
state->flags |= B64ENC_NO_LINEFEEDS;
else if (title)
@@ -158,50 +175,21 @@ enc_start (struct b64state *state, FILE *fp, estream_t stream,
}
state->title = xtrystrdup (title);
if (!state->title)
- state->lasterr = gpg_error_from_syserror ();
+ {
+ xfree (state);
+ return NULL;
+ }
}
- return state->lasterr;
-}
-
-
-/* Prepare for base-64 writing to the stream FP. If TITLE is not NULL
- and not an empty string, this string will be used as the title for
- the armor lines, with TITLE being an empty string, we don't write
- the header lines and furthermore even don't write any linefeeds.
- If TITLE starts with "PGP " the OpenPGP CRC checksum will be
- written as well. With TITLE being NULL, we merely don't write
- header but make sure that lines are not too long. Note, that we
- don't write any output unless at least one byte get written using
- b64enc_write. */
-gpg_error_t
-b64enc_start (struct b64state *state, FILE *fp, const char *title)
-{
- return enc_start (state, fp, NULL, title);
-}
-
-/* Same as b64enc_start but takes an estream. */
-gpg_error_t
-b64enc_start_es (struct b64state *state, estream_t fp, const char *title)
-{
- return enc_start (state, NULL, fp, title);
-}
-
-static int
-my_fputs (const char *string, struct b64state *state)
-{
- if (state->stream)
- return es_fputs (string, state->stream);
- else
- return fputs (string, state->fp);
+ return state;
}
-/* Write NBYTES from BUFFER to the Base 64 stream identified by
- STATE. With BUFFER and NBYTES being 0, merely do a fflush on the
- stream. */
-gpg_error_t
-b64enc_write (struct b64state *state, const void *buffer, size_t nbytes)
+/* Write NBYTES from BUFFER to the Base 64 stream identified by STATE.
+ * With BUFFER and NBYTES being 0, merely do a fflush on the stream.
+ */
+gpg_err_code_t
+_gpgrt_b64enc_write (gpgrt_b64state_t state, const void *buffer, size_t nbytes)
{
unsigned char radbuf[4];
int idx, quad_count;
@@ -213,7 +201,7 @@ b64enc_write (struct b64state *state, const void *buffer, size_t nbytes)
if (!nbytes)
{
if (buffer)
- if (state->stream? es_fflush (state->stream) : fflush (state->fp))
+ if (_gpgrt_fflush (state->stream))
goto write_error;
return 0;
}
@@ -222,12 +210,12 @@ b64enc_write (struct b64state *state, const void *buffer, size_t nbytes)
{
if (state->title)
{
- if ( my_fputs ("-----BEGIN ", state) == EOF
- || my_fputs (state->title, state) == EOF
- || my_fputs ("-----\n", state) == EOF)
+ if ( _gpgrt_fputs ("-----BEGIN ", state->stream) == EOF
+ || _gpgrt_fputs (state->title, state->stream) == EOF
+ || _gpgrt_fputs ("-----\n", state->stream) == EOF)
goto write_error;
if ( (state->flags & B64ENC_USE_PGPCRC)
- && my_fputs ("\n", state) == EOF)
+ && _gpgrt_fputs ("\n", state->stream) == EOF)
goto write_error;
}
@@ -236,16 +224,16 @@ b64enc_write (struct b64state *state, const void *buffer, size_t nbytes)
idx = state->idx;
quad_count = state->quad_count;
- assert (idx < 4);
+ gpgrt_assert (idx < 4);
memcpy (radbuf, state->radbuf, idx);
if ( (state->flags & B64ENC_USE_PGPCRC) )
{
size_t n;
- u32 crc = state->crc;
+ uint32_t crc = state->crc;
for (p=buffer, n=nbytes; n; p++, n-- )
- crc = ((u32)crc << 8) ^ crc_table[((crc >> 16)&0xff) ^ *p];
+ crc = ((uint32_t)crc << 8) ^ crc_table[((crc >> 16)&0xff) ^ *p];
state->crc = (crc & 0x00ffffff);
}
@@ -260,27 +248,17 @@ b64enc_write (struct b64state *state, const void *buffer, size_t nbytes)
tmp[1] = bintoasc[(((*radbuf<<4)&060)|((radbuf[1] >> 4)&017))&077];
tmp[2] = bintoasc[(((radbuf[1]<<2)&074)|((radbuf[2]>>6)&03))&077];
tmp[3] = bintoasc[radbuf[2]&077];
- if (state->stream)
- {
- for (idx=0; idx < 4; idx++)
- es_putc (tmp[idx], state->stream);
- idx = 0;
- if (es_ferror (state->stream))
- goto write_error;
- }
- else
- {
- for (idx=0; idx < 4; idx++)
- putc (tmp[idx], state->fp);
- idx = 0;
- if (ferror (state->fp))
- goto write_error;
- }
+ for (idx=0; idx < 4; idx++)
+ _gpgrt_fputc (tmp[idx], state->stream);
+ idx = 0;
+ if (_gpgrt_ferror (state->stream))
+ goto write_error;
+
if (++quad_count >= (64/4))
{
quad_count = 0;
if (!(state->flags & B64ENC_NO_LINEFEEDS)
- && my_fputs ("\n", state) == EOF)
+ && _gpgrt_fputs ("\n", state->stream) == EOF)
goto write_error;
}
}
@@ -291,7 +269,7 @@ b64enc_write (struct b64state *state, const void *buffer, size_t nbytes)
return 0;
write_error:
- state->lasterr = gpg_error_from_syserror ();
+ state->lasterr = _gpg_err_code_from_syserror ();
if (state->title)
{
xfree (state->title);
@@ -301,16 +279,28 @@ b64enc_write (struct b64state *state, const void *buffer, size_t nbytes)
}
-gpg_error_t
-b64enc_finish (struct b64state *state)
+gpg_err_code_t
+_gpgrt_b64enc_finish (gpgrt_b64state_t state)
{
- gpg_error_t err = 0;
+ gpg_err_code_t err = 0;
unsigned char radbuf[4];
int idx, quad_count;
char tmp[4];
+ if (!state)
+ return 0; /* Already released. */
+
+ if (state->using_decoder)
+ {
+ err = GPG_ERR_CONFLICT; /* State was created for the decoder. */
+ goto cleanup;
+ }
+
if (state->lasterr)
- return state->lasterr;
+ {
+ err = state->lasterr;
+ goto cleanup;
+ }
if (!(state->flags & B64ENC_DID_HEADER))
goto cleanup;
@@ -318,7 +308,7 @@ b64enc_finish (struct b64state *state)
/* Flush the base64 encoding */
idx = state->idx;
quad_count = state->quad_count;
- assert (idx < 4);
+ gpgrt_assert (idx < 4);
memcpy (radbuf, state->radbuf, idx);
if (idx)
@@ -336,26 +326,16 @@ b64enc_finish (struct b64state *state)
tmp[2] = bintoasc[((radbuf[1] << 2) & 074) & 077];
tmp[3] = '=';
}
- if (state->stream)
- {
- for (idx=0; idx < 4; idx++)
- es_putc (tmp[idx], state->stream);
- if (es_ferror (state->stream))
- goto write_error;
- }
- else
- {
- for (idx=0; idx < 4; idx++)
- putc (tmp[idx], state->fp);
- if (ferror (state->fp))
- goto write_error;
- }
+ for (idx=0; idx < 4; idx++)
+ _gpgrt_fputc (tmp[idx], state->stream);
+ if (_gpgrt_ferror (state->stream))
+ goto write_error;
if (++quad_count >= (64/4))
{
quad_count = 0;
if (!(state->flags & B64ENC_NO_LINEFEEDS)
- && my_fputs ("\n", state) == EOF)
+ && _gpgrt_fputs ("\n", state->stream) == EOF)
goto write_error;
}
}
@@ -363,13 +343,13 @@ b64enc_finish (struct b64state *state)
/* Finish the last line and write the trailer. */
if (quad_count
&& !(state->flags & B64ENC_NO_LINEFEEDS)
- && my_fputs ("\n", state) == EOF)
+ && _gpgrt_fputs ("\n", state->stream) == EOF)
goto write_error;
if ( (state->flags & B64ENC_USE_PGPCRC) )
{
/* Write the CRC. */
- my_fputs ("=", state);
+ _gpgrt_fputs ("=", state->stream);
radbuf[0] = state->crc >>16;
radbuf[1] = state->crc >> 8;
radbuf[2] = state->crc;
@@ -377,46 +357,30 @@ b64enc_finish (struct b64state *state)
tmp[1] = bintoasc[(((*radbuf<<4)&060)|((radbuf[1]>>4)&017))&077];
tmp[2] = bintoasc[(((radbuf[1]<<2)&074)|((radbuf[2]>>6)&03))&077];
tmp[3] = bintoasc[radbuf[2]&077];
- if (state->stream)
- {
- for (idx=0; idx < 4; idx++)
- es_putc (tmp[idx], state->stream);
- if (es_ferror (state->stream))
- goto write_error;
- }
- else
- {
- for (idx=0; idx < 4; idx++)
- putc (tmp[idx], state->fp);
- if (ferror (state->fp))
- goto write_error;
- }
+ for (idx=0; idx < 4; idx++)
+ _gpgrt_fputc (tmp[idx], state->stream);
+ if (_gpgrt_ferror (state->stream))
+ goto write_error;
+
if (!(state->flags & B64ENC_NO_LINEFEEDS)
- && my_fputs ("\n", state) == EOF)
+ && _gpgrt_fputs ("\n", state->stream) == EOF)
goto write_error;
}
if (state->title)
{
- if ( my_fputs ("-----END ", state) == EOF
- || my_fputs (state->title, state) == EOF
- || my_fputs ("-----\n", state) == EOF)
+ if ( _gpgrt_fputs ("-----END ", state->stream) == EOF
+ || _gpgrt_fputs (state->title, state->stream) == EOF
+ || _gpgrt_fputs ("-----\n", state->stream) == EOF)
goto write_error;
}
- goto cleanup;
+ cleanup:
+ xfree (state->title);
+ xfree (state);
+ return err;
write_error:
err = gpg_error_from_syserror ();
-
- cleanup:
- if (state->title)
- {
- xfree (state->title);
- state->title = NULL;
- }
- state->fp = NULL;
- state->stream = NULL;
- state->lasterr = err;
- return err;
+ goto cleanup;
}
diff --git a/src/gpg-error.def.in b/src/gpg-error.def.in
index 33ef794..67bb12e 100644
--- a/src/gpg-error.def.in
+++ b/src/gpg-error.def.in
@@ -214,5 +214,9 @@ EXPORTS
gpgrt_set_usage_outfnc @164
gpgrt_set_fixed_string_mapper @165
+ gpgrt_b64enc_start @166
+ gpgrt_b64enc_write @167
+ gpgrt_b64enc_finish @168
+
;; end of file with public symbols for Windows.
diff --git a/src/gpg-error.h.in b/src/gpg-error.h.in
index c0656e2..a36e8b1 100644
--- a/src/gpg-error.h.in
+++ b/src/gpg-error.h.in
@@ -908,16 +908,22 @@ int gpgrt_vsnprintf (char *buf,size_t bufsize,
/*
- * Base64 decode functions.
+ * Base64 encode and decode functions.
*/
struct _gpgrt_b64state;
typedef struct _gpgrt_b64state *gpgrt_b64state_t;
+gpgrt_b64state_t gpgrt_b64enc_start (gpgrt_stream_t stream, const char *title);
+gpg_err_code_t gpgrt_b64enc_write (gpgrt_b64state_t state,
+ const void *buffer, size_t nbytes);
+gpg_err_code_t gpgrt_b64enc_finish (gpgrt_b64state_t state);
+
gpgrt_b64state_t gpgrt_b64dec_start (const char *title);
-gpg_error_t gpgrt_b64dec_proc (gpgrt_b64state_t state,
- void *buffer, size_t length, size_t *r_nbytes);
-gpg_error_t gpgrt_b64dec_finish (gpgrt_b64state_t state);
+gpg_error_t gpgrt_b64dec_proc (gpgrt_b64state_t state,
+ void *buffer, size_t length,
+ size_t *r_nbytes);
+gpg_error_t gpgrt_b64dec_finish (gpgrt_b64state_t state);
diff --git a/src/gpg-error.vers b/src/gpg-error.vers
index c7de3c4..201b784 100644
--- a/src/gpg-error.vers
+++ b/src/gpg-error.vers
@@ -186,6 +186,11 @@ GPG_ERROR_1.0 {
gpgrt_set_usage_outfnc;
gpgrt_set_fixed_string_mapper;
+ gpgrt_b64enc_start;
+ gpgrt_b64enc_write;
+ gpgrt_b64enc_finish;
+
+
local:
*;
};
diff --git a/src/gpgrt-int.h b/src/gpgrt-int.h
index 5d54a51..34e494c 100644
--- a/src/gpgrt-int.h
+++ b/src/gpgrt-int.h
@@ -480,10 +480,30 @@ int _gpgrt_w32_poll (gpgrt_poll_t *fds, size_t nfds, int timeout);
* Local prototypes for the encoders.
*/
+struct _gpgrt_b64state
+{
+ int idx;
+ int quad_count;
+ estream_t stream;
+ char *title;
+ unsigned char radbuf[4];
+ unsigned int crc;
+ gpg_err_code_t lasterr;
+ unsigned int flags;
+ int stop_seen:1;
+ int invalid_encoding:1;
+ int using_decoder:1;
+};
+
+gpgrt_b64state_t _gpgrt_b64enc_start (estream_t stream, const char *title);
+gpg_err_code_t _gpgrt_b64enc_write (gpgrt_b64state_t state,
+ const void *buffer, size_t nbytes);
+gpg_err_code_t _gpgrt_b64enc_finish (gpgrt_b64state_t state);
+
gpgrt_b64state_t _gpgrt_b64dec_start (const char *title);
-gpg_error_t _gpgrt_b64dec_proc (gpgrt_b64state_t state, void *buffer,
- size_t length, size_t *r_nbytes);
-gpg_error_t _gpgrt_b64dec_finish (gpgrt_b64state_t state);
+gpg_err_code_t _gpgrt_b64dec_proc (gpgrt_b64state_t state, void *buffer,
+ size_t length, size_t *r_nbytes);
+gpg_err_code_t _gpgrt_b64dec_finish (gpgrt_b64state_t state);
diff --git a/src/visibility.c b/src/visibility.c
index 315bf32..6f8bb24 100644
--- a/src/visibility.c
+++ b/src/visibility.c
@@ -790,6 +790,24 @@ gpgrt_getcwd (void)
gpgrt_b64state_t
+gpgrt_b64enc_start (estream_t stream, const char *title)
+{
+ return _gpgrt_b64enc_start (stream, title);
+}
+
+gpg_err_code_t
+gpgrt_b64enc_write (gpgrt_b64state_t state, const void *buffer, size_t nbytes)
+{
+ return _gpgrt_b64enc_write (state, buffer, nbytes);
+}
+
+gpg_err_code_t
+gpgrt_b64enc_finish (gpgrt_b64state_t state)
+{
+ return _gpgrt_b64enc_finish (state);
+}
+
+gpgrt_b64state_t
gpgrt_b64dec_start (const char *title)
{
return _gpgrt_b64dec_start (title);
diff --git a/src/visibility.h b/src/visibility.h
index eae0f81..cfa32e5 100644
--- a/src/visibility.h
+++ b/src/visibility.h
@@ -161,6 +161,9 @@ MARK_VISIBLE (gpgrt_getcwd)
MARK_VISIBLE (gpgrt_b64dec_start)
MARK_VISIBLE (gpgrt_b64dec_proc)
MARK_VISIBLE (gpgrt_b64dec_finish)
+MARK_VISIBLE (gpgrt_b64enc_start)
+MARK_VISIBLE (gpgrt_b64enc_write)
+MARK_VISIBLE (gpgrt_b64enc_finish)
MARK_VISIBLE (gpgrt_get_errorcount)
MARK_VISIBLE (gpgrt_inc_errorcount)
@@ -327,6 +330,9 @@ MARK_VISIBLE (gpgrt_set_usage_outfnc);
#define gpgrt_get_syscall_clamp _gpgrt_USE_UNDERSCORED_FUNCTION
#define gpgrt_set_alloc_func _gpgrt_USE_UNDERSCORED_FUNCTION
+#define gpgrt_b64enc_start _gpgrt_USE_UNDERSCORED_FUNCTION
+#define gpgrt_b64enc_write _gpgrt_USE_UNDERSCORED_FUNCTION
+#define gpgrt_b64enc_finish _gpgrt_USE_UNDERSCORED_FUNCTION
#define gpgrt_b64dec_start _gpgrt_USE_UNDERSCORED_FUNCTION
#define gpgrt_b64dec_proc _gpgrt_USE_UNDERSCORED_FUNCTION
#define gpgrt_b64dec_finish _gpgrt_USE_UNDERSCORED_FUNCTION