rsa.h

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#pragma once
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
 
#ifdef __cplusplus
extern "C" {
#endif

#define GPG_RSA_MAX_MODULUS_BYTES 512

bool gpg_rsa_blob_build(uint16_t n_bits, const uint8_t* e, size_t e_len,
                        const uint8_t* p, size_t p_len, const uint8_t* q, size_t q_len,
                        uint8_t* blob_out, size_t blob_cap, size_t* blob_len_out);

bool gpg_rsa_generate(uint16_t n_bits, uint8_t* blob_out, size_t blob_cap, size_t* blob_len_out);

bool gpg_rsa_blob_public(const uint8_t* blob, size_t blob_len,
                         uint8_t* n_out, size_t n_cap, size_t* n_len_out,
                         uint8_t* e_out, size_t e_cap, size_t* e_len_out);

bool gpg_rsa_sign(const uint8_t* blob, size_t blob_len,
                  const uint8_t* digestinfo, size_t di_len,
                  uint8_t* sig_out, size_t sig_cap, size_t* sig_len_out);

bool gpg_rsa_decrypt(const uint8_t* blob, size_t blob_len,
                     const uint8_t* ct, size_t ct_len,
                     uint8_t* pt_out, size_t pt_cap, size_t* pt_len_out);

bool gpg_rsa_selftest(uint16_t n_bits);
 
#ifdef __cplusplus
}
#endif