Struct ot_certs::asn1::codegen::Codegen

pub struct Codegen<'a> { /* private fields */ }

ASN1 code generator.

Implementations

impl Codegen<'_>

pub fn generate( buf_name: &str, buf_size_name: &str, indent: &str, indent_lvl: usize, constants: &mut ConstantPool, variable_info: &dyn Fn(&str) -> Result<VariableInfo>, gen: impl FnOnce(&mut Codegen<'_>) -> Result<()> ) -> Result<(String, usize)>

Generate code that corresponds to an ASN1 document described by a closure acting on a Builder. Returns the generated code and the maximum possible size of the output.

Arguments

• buf_name - Name of the variable holding the pointer to the output buffer.
• buf_size_name - Name of the variable holding the size of the output buffer. This variable is updated by the code to hold the actual size of the data after production.
• indent - Identation string (one level).
• indent_lvl - Initial identation level.
• constants - Constant pool used to create necessary constants for the code.
• variables - Description of the variable types used when producing the output.
• gen - Closure generating the ASN1 document.

Trait Implementations

impl Builder for Codegen<'_>

fn push_byte(&mut self, val: u8) -> Result<()>

Push a byte into the ASN1 output, the value can be any C expression.

fn push_boolean(&mut self, tag: &Tag, val: &Value<bool>) -> Result<()>

Push a tagged boolean into the ASN1 output.

fn push_integer( &mut self, name_hint: Option<String>, tag: &Tag, val: &Value<BigUint> ) -> Result<()>

Push a tagged integer into the ASN1 output, the buffer (a big-endian integer) and its size are arbitrary C expressions.

fn push_integer_pad( &mut self, name_hint: Option<String>, val: &Value<BigUint>, size: usize ) -> Result<()>

Push a byte array into the ASN1 output, represeting an integer. If the provided buffer is too small, it will be padded with zeroes. Note that this function does not add a tag to the ASN1 output.

fn push_byte_array( &mut self, name_hint: Option<String>, val: &Value<Vec<u8>> ) -> Result<()>

Push a byte array of fixed length into the ASN1 output. Note that this function does not add a tag to the ASN1 output.

fn push_string( &mut self, _name_hint: Option<String>, str_type: &Tag, val: &Value<String> ) -> Result<()>

Push an optionally tagged string into the ASN1 output.

fn push_bitstring<'a>( &mut self, name_hint: Option<String>, tag: &Tag, bits: &[Value<bool>] ) -> Result<()>

fn push_oid(&mut self, oid: &Oid) -> Result<()>

Push a tagged object identifier into the ASN1 output.

fn push_tag( &mut self, name_hint: Option<String>, tag: &Tag, gen: impl FnOnce(&mut Self) -> Result<()> ) -> Result<()>

Push tagged content into the ASN1 output. The closure can use any available function of the builder and produces the content of the tagged data.

fn push_octet_string( &mut self, name_hint: Option<String>, gen: impl FnOnce(&mut Self) -> Result<()> ) -> Result<()>

Push a tagged octet string into the ASN1 output. The closure can use any available function of the builder and produces the content of the octet string.

fn push_seq( &mut self, name_hint: Option<String>, gen: impl FnOnce(&mut Self) -> Result<()> ) -> Result<()>

Push a sequence into the ASN1 output. The closure can use any available function of the builder and produces the content of the sequence.

fn push_set( &mut self, name_hint: Option<String>, gen: impl FnOnce(&mut Self) -> Result<()> ) -> Result<()>

Push a sequence into the ASN1 output. The closure can use any available function of the builder and produces the content of the set.

fn push_as_bit_string( &mut self, name_hint: Option<String>, tag: &Tag, unused_bits: usize, gen: impl FnOnce(&mut Self) -> Result<()> ) -> Result<()>

Push tagged content into the ASN1 output as a bitstring. The closure can use any available function of the builder and the resulting content will be stored as a BITSTRING using the provided tag and unused number of bits.