int convert_pem_to_der( const unsigned char *input, size_t ilen,
unsigned char *output, size_t *olen )
{
int ret;
const unsigned char *s1, *s2, *end = input + ilen;
size_t len = 0;
s1 = (unsigned char *) strstr( (const char *) input, "-----BEGIN" );
if( s1 == NULL )
return( -1 );
s2 = (unsigned char *) strstr( (const char *) input, "-----END" );
if( s2 == NULL )
return( -1 );
s1 += 10;
while( s1 < end && *s1 != '-' )
s1++;
while( s1 < end && *s1 == '-' )
s1++;
if( *s1 == '\r' ) s1++;
if( *s1 == '\n' ) s1++;
if( s2 <= s1 || s2 > end )
return( -1 );
ret = mbedtls_base64_decode( NULL, 0, &len, (const unsigned char *) s1, s2 - s1 );
if( ret == MBEDTLS_ERR_BASE64_INVALID_CHARACTER )
return( ret );
if( len > *olen )
return( -1 );
if( ( ret = mbedtls_base64_decode( output, len, &len, (const unsigned char *) s1,
s2 - s1 ) ) != 0 )
{
return( ret );
}
*olen = len;
return( 0 );
}
int pcrypto_base64_decode( const char *base64, void *out_data, size_t *out_data_len ){
return mbedtls_base64_decode( out_data, *out_data_len, out_data_len, (const unsigned char*)base64, strlen( base64 ) );
}