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Move *_pemify() function to PEM module

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This commit is contained in:
Paul Bakker 2013-09-15 20:03:26 +02:00
parent 40ce79f1e6
commit 77e23fb0e0
8 changed files with 111 additions and 185 deletions
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50
library/pem.c
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@ -363,6 +363,56 @@ int pem_read_buffer( pem_context *ctx, const char *header, const char *footer,
return( 0 );
}
int pem_write_buffer( const char *header, const char *footer,
const unsigned char *der_data, size_t der_len,
unsigned char *buf, size_t buf_len, size_t *olen )
{
int ret;
unsigned char *encode_buf, *c, *p = buf;
size_t len = 0, use_len = 0;
size_t add_len = strlen( header ) + strlen( footer ) + ( use_len / 64 ) + 1;
base64_encode( NULL, &use_len, der_data, der_len );
if( use_len + add_len > buf_len )
{
*olen = use_len + add_len;
return( POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL );
}
if( ( encode_buf = polarssl_malloc( use_len ) ) == NULL )
return( POLARSSL_ERR_PEM_MALLOC_FAILED );
if( ( ret = base64_encode( encode_buf, &use_len, der_data,
der_len ) ) != 0 )
{
polarssl_free( encode_buf );
return( ret );
}
memcpy( p, header, strlen( header ) );
p += strlen( header );
c = encode_buf;
while( use_len )
{
len = ( use_len > 64 ) ? 64 : use_len;
memcpy( p, c, len );
use_len -= len;
p += len;
c += len;
*p++ = '\n';
}
memcpy( p, footer, strlen( footer ) );
p += strlen( footer );
*p++ = '\0';
*olen = p - buf;
polarssl_free( encode_buf );
return( 0 );
}
void pem_free( pem_context *ctx )
{
if( ctx->buf )