Hello! I'm new to gpgme and have some understanding problems:
I'm trying to export a key:
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err = gpgme_data_new(&data);
err = gpgme_op_export(ceofcontext,NULL,0,data); /* returns no error */
read_bytes = gpgme_data_seek (data, 0, SEEK_END); /* returns -1 */
p = gpgme_strerror(errno); /* returns "Invalid encoding method" */
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So I added more code to my test:
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setlocale (LC_ALL, "");
gpgme_set_locale (NULL, LC_CTYPE, setlocale (LC_CTYPE, NULL));
gpgme_set_textmode(ceofcontext,0);
gpgme_set_armor(ceofcontext, 1);
err = gpgme_data_set_encoding(data,GPGME_DATA_ENCODING_ARMOR);
if(err != GPG_ERR_NO_ERROR) return 11;
tmp = gpgme_data_get_encoding(data);
if(tmp == GPGME_DATA_ENCODING_ARMOR) {
printf("encode ok\n"); /* matches / is printed out */
}
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Still the same error.
Then I tried t-export.c from the test directory from gpgme. Result:
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[23:47] denkbrett:gpg% LANG=C ./t-export
Begin Result:
t-support.h:56: Unspecified source: Invalid argument
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I searched for examples for using gpgme, but there seem to be more or
less none available.
Does anyone have a hint for me, what I am doing wrong?
I attached the whole testprogram.
Sincerly
Nico
--
Think about Free and Open Source Software (FOSS).
http://nico.schottelius.org/documentations/foss/the-term-foss/
PGP: BFE4 C736 ABE5 406F 8F42 F7CF B8BE F92A 9885 188C
#include <gpgme.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <locale.h>
#define SIZE 1024
int main()
{
char *p;
char buf[SIZE];
gpgme_ctx_t ceofcontext;
gpgme_engine_info_t enginfo;
gpgme_error_t err;
gpgme_data_t data;
size_t read_bytes;
int tmp;
/* The function `gpgme_check_version' must be called before any other
* function in the library, because it initializes the thread support
* subsystem in GPGME. (from the info page) */
setlocale (LC_ALL, "");
p = gpgme_check_version(NULL);
printf("version=%s\n",p);
/* set locale, because tests do also */
gpgme_set_locale (NULL, LC_CTYPE, setlocale (LC_CTYPE, NULL));
err = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
if(err != GPG_ERR_NO_ERROR) return 10;
p = gpgme_get_protocol_name(GPGME_PROTOCOL_OpenPGP);
printf("Version: %s\n",p);
/* get engine information */
err = gpgme_get_engine_info(&enginfo);
if(err != GPG_ERR_NO_ERROR) return 3;
printf("file=%s, home=%s\n",enginfo->file_name,enginfo->home_dir);
/* create our own context */
err = gpgme_new(&ceofcontext);
if(err != GPG_ERR_NO_ERROR) return 1;
/* FIXME: check protocol availbility before! */
err = gpgme_set_protocol(ceofcontext,GPGME_PROTOCOL_OpenPGP);
if(err != GPG_ERR_NO_ERROR) return 2;
gpgme_set_textmode(ceofcontext,0);
/* FIXME: both needed? */
/* FIXME: why is the path (FILE_NAME) needed? */
/* FIXME: /usr/bin/gpg must be changed to ~/.ceof/gpg/binary or similar */
err = gpgme_ctx_set_engine_info (ceofcontext, GPGME_PROTOCOL_OpenPGP,
"/usr/bin/gpg","/home/user/nico/.ceof/gpg/");
if(err != GPG_ERR_NO_ERROR) return 4;
/* do not ascii armor data */
//gpgme_set_armor(ceofcontext, 0);
gpgme_set_armor(ceofcontext, 1);
/* create buffer */
err = gpgme_data_new(&data);
if(err != GPG_ERR_NO_ERROR) return 6;
/* set encoding for the buffer... */
err = gpgme_data_set_encoding(data,GPGME_DATA_ENCODING_ARMOR);
if(err != GPG_ERR_NO_ERROR) return 11;
tmp = gpgme_data_get_encoding(data);
if(tmp == GPGME_DATA_ENCODING_ARMOR) {
printf("encode ok\n");
} else {
printf("encode broken\n");
}
/* export public key: WARNING: need to create buffer before! */
//err = gpgme_op_export(ceofcontext,"nico schottelius",0,data);
//
/* FIXME: gpgme_op_export vs. gpgme_op_export_ext vs. gpgme_op_export_start */
err = gpgme_op_export(ceofcontext,NULL,0,data);
if(err != GPG_ERR_NO_ERROR) return 7;
//err = gpgme_op_export_ext(ceofcontext,NULL,0,data);
// err = gpgme_op_export_start(ceofcontext,NULL,0,data);
// if(err != GPG_ERR_NO_ERROR) return 5;
//gpgme_wait(ceofcontext,&err,1);
/* from the t-exports.c file */
read_bytes = gpgme_data_seek (data, 0, SEEK_END);
printf("end is=%d\n",read_bytes);
if(read_bytes == -1) {
p = gpgme_strerror(errno);
printf("data-seek-err: %s\n",p);
}
read_bytes = gpgme_data_seek (data, 0, SEEK_SET);
printf("start is=%d\n",read_bytes);
while ((read_bytes = gpgme_data_read (data, buf, SIZE)) > 0) {
write(1,buf,read_bytes);
}
write(1,"\n",1);
/* FIXME: as developers to documentate how to use tha data buffer! */
read_bytes = gpgme_data_read(data, buf, sizeof (buf));
printf("Bytes: %d, bufsize=%d\n",read_bytes,sizeof(buf));
/* list keys */
// err = gpgpme_op_keylist_start(ceofcontext,NULL,0);
//gpgme_op_keylist_next(ceofcontext,
/* free data */
gpgme_data_release(data);
/* free context */
gpgme_release(ceofcontext);
// to ceof-dir?
// gpgme_set_engine_info
// (gpgme_protocol_t PROTO, const char *FILE_NAME, const char *HOME_DIR)
// GPGME_PROTOCOL_OpenPGP
//
/* 4.1 Public Key Algorithms
* GPGME_PK_RSA
* 4.2 Hash Algorithms
* 6.1.1 Memory Based Data Buffers
* gpgme_error_t gpgme_data_new (gpgme_data_t *DH)
*
* 7 Contexts
* -- Data type: gpgme_ctx_t
* gpgme_error_t gpgme_new (gpgme_ctx_t *CTX)
* GPG_ERR_NO_ERROR
*
* -- Function: gpgme_error_t gpgme_set_protocol (gpgme_ctx_t CTX,
* gpgme_protocol_t PROTO)
*
* -- Function: gpgme_error_t gpgme_ctx_set_engine_info (gpgme_ctx_t CTX,
* gpgme_protocol_t PROTO, const char *FILE_NAME,
* const char *HOME_DIR)
*
*/
return 0;
}
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