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Generalized PEM writing in x509write module for RSA keys as well

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This commit is contained in:
Paul Bakker
2013-08-26 17:22:23 +02:00
parent 135f1e9c70
commit f3df61ad10
3 changed files with 175 additions and 77 deletions
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126
programs/pkey/key_app_writer.c
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@ -1,5 +1,5 @@
/*
* Key reading application
* Key writing application
*
* Copyright (C) 2006-2013, Brainspark B.V.
*
@ -60,11 +60,15 @@ int main( int argc, char *argv[] )
#define OUTPUT_MODE_PRIVATE 1
#define OUTPUT_MODE_PUBLIC 2
#define OUTPUT_FORMAT_PEM 0
#define OUTPUT_FORMAT_DER 1
#define DFL_MODE MODE_NONE
#define DFL_FILENAME "keyfile.key"
#define DFL_DEBUG_LEVEL 0
#define DFL_OUTPUT_MODE OUTPUT_MODE_NONE
#define DFL_OUTPUT_MODE OUTPUT_MODE_NONE
#define DFL_OUTPUT_FILENAME "keyfile.pem"
#define DFL_OUTPUT_FORMAT OUTPUT_FORMAT_PEM
/*
* global options
@ -75,79 +79,80 @@ struct options
const char *filename; /* filename of the key file */
int output_mode; /* the output mode to use */
const char *output_file; /* where to store the constructed key file */
int output_format; /* the output format to use */
} opt;
static void write_public_key( rsa_context *rsa, const char *output_file )
static int write_public_key( rsa_context *rsa, const char *output_file )
{
int ret;
FILE *f;
unsigned char output_buf[16000];
unsigned char base_buf[16000];
unsigned char *c;
int ret;
size_t len = 0, olen = 16000;
unsigned char *c = output_buf;
size_t len = 0;
memset(output_buf, 0, 16000);
ret = x509_write_pubkey_der( output_buf, 16000, rsa );
if( ret < 0 )
return;
len = ret;
c = output_buf + 15999 - len;
base64_encode( base_buf, &olen, c, len );
c = base_buf;
f = fopen( output_file, "w" );
fprintf(f, "-----BEGIN PUBLIC KEY-----\n");
while (olen)
if( opt.output_format == OUTPUT_FORMAT_PEM )
{
int use_len = olen;
if (use_len > 64) use_len = 64;
fwrite( c, 1, use_len, f );
olen -= use_len;
c += use_len;
fprintf(f, "\n");
if( ( ret = x509write_pubkey_pem( rsa, output_buf, 16000 ) ) != 0 )
return( ret );
len = strlen( (char *) output_buf );
}
fprintf(f, "-----END PUBLIC KEY-----\n");
else
{
if( ( ret = x509write_pubkey_der( rsa, output_buf, 16000 ) ) < 0 )
return( ret );
len = ret;
c = output_buf + sizeof(output_buf) - len - 1;
}
if( ( f = fopen( output_file, "w" ) ) == NULL )
return( -1 );
if( fwrite( c, 1, len, f ) != len )
return( -1 );
fclose(f);
return( 0 );
}
static void write_private_key( rsa_context *rsa, const char *output_file )
static int write_private_key( rsa_context *rsa, const char *output_file )
{
int ret;
FILE *f;
unsigned char output_buf[16000];
unsigned char base_buf[16000];
unsigned char *c;
int ret;
size_t len = 0, olen = 16000;
unsigned char *c = output_buf;
size_t len = 0;
memset(output_buf, 0, 16000);
ret = x509_write_key_der( output_buf, 16000, rsa );
if( ret < 0 )
return;
len = ret;
c = output_buf + 15999 - len;
base64_encode( base_buf, &olen, c, len );
c = base_buf;
f = fopen( output_file, "w" );
fprintf(f, "-----BEGIN RSA PRIVATE KEY-----\n");
while (olen)
if( opt.output_format == OUTPUT_FORMAT_PEM )
{
int use_len = olen;
if (use_len > 64) use_len = 64;
fwrite( c, 1, use_len, f );
olen -= use_len;
c += use_len;
fprintf(f, "\n");
if( ( ret = x509write_key_pem( rsa, output_buf, 16000 ) ) != 0 )
return( ret );
len = strlen( (char *) output_buf );
}
fprintf(f, "-----END RSA PRIVATE KEY-----\n");
else
{
if( ( ret = x509write_key_der( rsa, output_buf, 16000 ) ) < 0 )
return( ret );
len = ret;
c = output_buf + sizeof(output_buf) - len - 1;
}
if( ( f = fopen( output_file, "w" ) ) == NULL )
return( -1 );
if( fwrite( c, 1, len, f ) != len )
return( -1 );
fclose(f);
return( 0 );
}
#define USAGE \
@ -156,7 +161,8 @@ static void write_private_key( rsa_context *rsa, const char *output_file )
" mode=private|public default: none\n" \
" filename=%%s default: keyfile.key\n" \
" output_mode=private|public default: none\n" \
" output_file=%%s defeult: keyfile.pem\n" \
" output_file=%%s default: keyfile.pem\n" \
" output_format=pem|der default: pem\n" \
"\n"
int main( int argc, char *argv[] )
@ -184,6 +190,7 @@ int main( int argc, char *argv[] )
opt.filename = DFL_FILENAME;
opt.output_mode = DFL_OUTPUT_MODE;
opt.output_file = DFL_OUTPUT_FILENAME;
opt.output_format = DFL_OUTPUT_FORMAT;
for( i = 1; i < argc; i++ )
{
@ -210,6 +217,15 @@ int main( int argc, char *argv[] )
else
goto usage;
}
else if( strcmp( p, "output_format" ) == 0 )
{
if( strcmp( q, "pem" ) == 0 )
opt.output_format = OUTPUT_FORMAT_PEM;
else if( strcmp( q, "der" ) == 0 )
opt.output_format = OUTPUT_FORMAT_DER;
else
goto usage;
}
else if( strcmp( p, "filename" ) == 0 )
opt.filename = q;
else if( strcmp( p, "output_file" ) == 0 )