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hybrid_sc_multi.c
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hybrid_sc_multi.c
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#include <openssl/bio.h>
#include <openssl/bn.h>
#include <openssl/cmac.h>
#include <openssl/core_names.h>
#include <openssl/crypto.h>
#include <openssl/ec.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/kdf.h>
#include <openssl/objects.h>
#include <openssl/params.h>
#include <openssl/pem.h>
#include <openssl/pkcs12.h>
#include <openssl/ssl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef struct ec_keypair_t {
EVP_PKEY *priv;
EVP_PKEY *pub;
unsigned char *pub_hex;
unsigned char *pub_bin;
size_t pub_bin_len;
} ec_keypair_t;
typedef struct hybrid_signcryption_t{
unsigned char *iv;
size_t iv_len;
unsigned char *ciphertext;
size_t ciphertext_len;
unsigned char *tag;
size_t tag_len;
unsigned char *s;
size_t s_len;
} hybrid_signcryption_t;
typedef struct imessage_t{
unsigned char *iv;
size_t iv_len;
unsigned char *c1;
size_t c1_len;
unsigned char *c2;
size_t c2_len;
unsigned char *sig;
size_t sig_len;
} imessage_t;
typedef struct hpke_enc_t{
unsigned char *ye;
size_t ye_len;
unsigned char *ciphertext;
size_t ciphertext_len;
unsigned char *tag;
size_t tag_len;
} hpke_enc_t;
typedef struct ecies_encrypt_t{
unsigned char *ye;
size_t ye_len;
unsigned char *iv;
size_t iv_len;
unsigned char *ciphertext;
size_t ciphertext_len;
} ecies_encrypt_t;
typedef struct ecies_signature_t {
ecies_encrypt_t *c;
unsigned char *sig;
size_t sig_len;
} ecies_signature_t;
EVP_PKEY *export_rsa_public_pkey(EVP_PKEY *rsa_priv)
{
OSSL_LIB_CTX *libctx = NULL;
EVP_PKEY_CTX *ctx = NULL;
EVP_PKEY *rsa_pub = NULL;
OSSL_PARAM params[3];
BIGNUM *n = NULL, *e = NULL;
size_t n_bin_len, e_bin_len;
unsigned char *n_bin=NULL, *e_bin =NULL;
EVP_PKEY_get_bn_param(rsa_priv, OSSL_PKEY_PARAM_RSA_N, &n);
EVP_PKEY_get_bn_param(rsa_priv, OSSL_PKEY_PARAM_RSA_E, &e);
n_bin_len = BN_num_bytes(n);
n_bin = OPENSSL_malloc(n_bin_len);
BN_bn2nativepad(n, n_bin, n_bin_len);
e_bin_len = BN_num_bytes(e);
e_bin = OPENSSL_malloc(e_bin_len);
BN_bn2nativepad(e, e_bin, e_bin_len);
params[0] = OSSL_PARAM_construct_BN(OSSL_PKEY_PARAM_RSA_N, n_bin, n_bin_len);
params[1] = OSSL_PARAM_construct_BN(OSSL_PKEY_PARAM_RSA_E, e_bin, e_bin_len);
params[2] = OSSL_PARAM_construct_end();
ctx = EVP_PKEY_CTX_new_from_name(libctx, "RSA", NULL);
EVP_PKEY_CTX_set_params(ctx, params);
EVP_PKEY_fromdata_init(ctx);
EVP_PKEY_fromdata(ctx, &rsa_pub, EVP_PKEY_PUBLIC_KEY, params);
EVP_PKEY_CTX_free(ctx);
OSSL_LIB_CTX_free(libctx);
BN_free(n);
BN_free(e);
OPENSSL_free(n_bin);
OPENSSL_free(e_bin);
return rsa_pub;
}
size_t rsa_oaep_encrypt(unsigned char *digest_name, EVP_PKEY *pub, unsigned char* in, size_t in_len, unsigned char ** out)
{
int ret=0;
OSSL_LIB_CTX *libctx=NULL;
EVP_PKEY_CTX *ctx = NULL;
char *propq = NULL;
size_t out_len;
OSSL_PARAM params[3];
params[0] = OSSL_PARAM_construct_utf8_string(OSSL_ASYM_CIPHER_PARAM_PAD_MODE, OSSL_PKEY_RSA_PAD_MODE_OAEP, 0);
params[1]= OSSL_PARAM_construct_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST, digest_name, 0);
params[2] = OSSL_PARAM_construct_end();
ctx = EVP_PKEY_CTX_new_from_pkey(libctx, pub, propq);
EVP_PKEY_encrypt_init_ex(ctx, params);
EVP_PKEY_encrypt(ctx, NULL, &out_len, in, in_len);
*out = OPENSSL_zalloc(out_len);
if( EVP_PKEY_encrypt(ctx, *out, &out_len, in, in_len) <=0 ){
OPENSSL_free(*out);
out_len = -1;
}
EVP_PKEY_CTX_free(ctx);
return out_len;
}
size_t rsa_oaep_decrypt(unsigned char *digest_name, EVP_PKEY *priv, unsigned char* in, size_t in_len, unsigned char ** out)
{
int ret=0;
OSSL_LIB_CTX *libctx=NULL;
EVP_PKEY_CTX *ctx = NULL;
char *propq = NULL;
size_t out_len;
OSSL_PARAM params[3];
params[0] = OSSL_PARAM_construct_utf8_string(OSSL_ASYM_CIPHER_PARAM_PAD_MODE, OSSL_PKEY_RSA_PAD_MODE_OAEP, 0);
params[1]= OSSL_PARAM_construct_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST, digest_name, 0);
params[2] = OSSL_PARAM_construct_end();
ctx = EVP_PKEY_CTX_new_from_pkey(libctx, priv, propq);
EVP_PKEY_decrypt_init_ex(ctx, params);
EVP_PKEY_decrypt(ctx, NULL, &out_len, in, in_len);
*out = OPENSSL_zalloc(out_len);
if( EVP_PKEY_decrypt(ctx, *out, &out_len, in, in_len) <=0 ){
OPENSSL_free(*out);
out_len = -1;
}
EVP_PKEY_CTX_free(ctx);
return out_len;
}
EVP_PKEY* evp_pkey_from_point_hex(EC_GROUP* group, char* point_hex, BN_CTX* ctx)
{
EC_KEY* ec_key = EC_KEY_new();
EC_KEY_set_group(ec_key, group);
EC_POINT* ec_pub_point = EC_POINT_new(group);
ec_pub_point = EC_POINT_hex2point(group, point_hex, ec_pub_point, ctx);
EC_KEY_set_public_key(ec_key, ec_pub_point);
EVP_PKEY *pkey = EVP_PKEY_new();
EVP_PKEY_assign_EC_KEY(pkey, ec_key);
return pkey;
}
int aes_ctr_raw(unsigned char *cipher_name, unsigned char *in, int in_len, unsigned char *key, unsigned char *iv, int iv_len, unsigned char **out, int is_encrypt )
{
EVP_CIPHER_CTX *ctx;
int out_len;
int len;
if(!(ctx = EVP_CIPHER_CTX_new()))
return -1;
const EVP_CIPHER *cipher = EVP_get_cipherbyname(cipher_name);
if(!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, is_encrypt))
return -1;
if(!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, is_encrypt))
return -1;
*out = OPENSSL_malloc(in_len);
if(!EVP_CipherUpdate(ctx, *out, &out_len, in, in_len))
return -1;
if(!EVP_CipherFinal_ex(ctx, *out, &len))
return -1;
out_len += len;
EVP_CIPHER_CTX_cleanup(ctx);
/*EVP_CIPHER_free(cipher);*/
return out_len;
}
int aead_encrypt_raw(unsigned char *cipher_name, unsigned char *plaintext, int plaintext_len, unsigned char *aad, int aad_len, unsigned char *key, unsigned char *iv, int iv_len, unsigned char **ciphertext, unsigned char **tag, int tag_len)
{
EVP_CIPHER_CTX *ctx;
int len;
int ciphertext_len;
if(!(ctx = EVP_CIPHER_CTX_new()))
return -1;
const EVP_CIPHER *cipher = EVP_get_cipherbyname(cipher_name);
if(1 != EVP_EncryptInit_ex(ctx, cipher, NULL, NULL, NULL))
return -1;
if(OPENSSL_strcasecmp(cipher_name, "gcm")){
if(1 != EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_GCM_SET_IVLEN, iv_len, NULL))
return -1;
}else if(OPENSSL_strcasecmp(cipher_name, "ccm")){
if(1 != EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_SET_IVLEN, iv_len, NULL))
return -1;
}
if(1 != EVP_EncryptInit_ex(ctx, NULL, NULL, key, iv))
return -1;
if(1 != EVP_EncryptUpdate(ctx, NULL, &len, aad, aad_len))
return -1;
*ciphertext = OPENSSL_malloc(plaintext_len);
if(1 != EVP_EncryptUpdate(ctx, *ciphertext, &len, plaintext, plaintext_len))
return -1;
ciphertext_len = len;
if(1 != EVP_EncryptFinal_ex(ctx, *ciphertext + len, &len))
return -1;
ciphertext_len += len;
*tag = OPENSSL_malloc(tag_len);
if(OPENSSL_strcasecmp(cipher_name, "gcm")){
if(1 != EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_GCM_GET_TAG, tag_len, *tag))
return -1;
}else if(OPENSSL_strcasecmp(cipher_name, "ccm")){
if(1 != EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_GET_TAG, tag_len, *tag))
return -1;
}
EVP_CIPHER_CTX_free(ctx);
/*EVP_CIPHER_free(cipher);*/
return ciphertext_len;
}
int aead_decrypt_raw( unsigned char *cipher_name, unsigned char *ciphertext, int ciphertext_len, unsigned char *aad, int aad_len, unsigned char *tag, int tag_len, unsigned char *key, unsigned char *iv, int iv_len, unsigned char **plaintext)
{
EVP_CIPHER_CTX *ctx;
int len;
int plaintext_len;
int ret;
if(!(ctx = EVP_CIPHER_CTX_new()))
return -1;
const EVP_CIPHER *cipher = EVP_get_cipherbyname(cipher_name);
if(!EVP_DecryptInit_ex(ctx, cipher, NULL, NULL, NULL))
return -1;
if(OPENSSL_strcasecmp(cipher_name, "gcm")){
if(1 != EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_GCM_SET_IVLEN, iv_len, NULL))
return -1;
}else if(OPENSSL_strcasecmp(cipher_name, "ccm")){
if(1 != EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_SET_IVLEN, iv_len, NULL))
return -1;
}
if(!EVP_DecryptInit_ex(ctx, NULL, NULL, key, iv))
return -1;
if(!EVP_DecryptUpdate(ctx, NULL, &len, aad, aad_len))
return -1;
*plaintext = OPENSSL_malloc(ciphertext_len);
if(!EVP_DecryptUpdate(ctx, *plaintext, &len, ciphertext, ciphertext_len))
return -1;
plaintext_len = len;
if(OPENSSL_strcasecmp(cipher_name, "gcm")){
if(1 != EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_GCM_SET_TAG, tag_len, tag))
return -1;
}else if(OPENSSL_strcasecmp(cipher_name, "ccm")){
if(1 != EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_SET_TAG, tag_len, tag))
return -1;
}
ret = EVP_DecryptFinal_ex(ctx, *plaintext + len, &len);
EVP_CIPHER_CTX_free(ctx);
/*EVP_CIPHER_free(cipher);*/
if(ret > 0) {
plaintext_len += len;
return plaintext_len;
} else {
return -1;
}
}
int hmac_raw3(char *digest_name, unsigned char* key, size_t key_len, unsigned char *data, size_t data_len, unsigned char *data2, size_t data2_len, unsigned char *data3, size_t data3_len, unsigned char **out)
{
char *propq = NULL;
OSSL_LIB_CTX *library_context = NULL;
EVP_MAC *mac = NULL;
EVP_MAC_CTX *mctx = NULL;
EVP_MD_CTX *digest_context = NULL;
size_t out_len = 0;
OSSL_PARAM params[4], *p = params;
library_context = OSSL_LIB_CTX_new();
mac = EVP_MAC_fetch(library_context, "HMAC", propq);
mctx = EVP_MAC_CTX_new(mac);
*p++ = OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_DIGEST, digest_name, sizeof(digest_name));
*p = OSSL_PARAM_construct_end();
EVP_MAC_init(mctx, key, key_len, params);
EVP_MAC_update(mctx, data, data_len);
EVP_MAC_update(mctx, data2, data2_len);
EVP_MAC_update(mctx, data3, data3_len);
EVP_MAC_final(mctx, NULL, &out_len, 0);
*out = OPENSSL_malloc(out_len);
EVP_MAC_final(mctx, *out, &out_len, out_len);
EVP_MD_CTX_free(digest_context);
EVP_MAC_CTX_free(mctx);
EVP_MAC_free(mac);
OSSL_LIB_CTX_free(library_context);
return out_len;
}
int hmac_raw(char *digest_name, unsigned char* key, size_t key_len, unsigned char *data, size_t data_len, unsigned char **out)
{
char *propq = NULL;
OSSL_LIB_CTX *library_context = NULL;
EVP_MAC *mac = NULL;
EVP_MAC_CTX *mctx = NULL;
EVP_MD_CTX *digest_context = NULL;
size_t out_len = 0;
OSSL_PARAM params[4], *p = params;
library_context = OSSL_LIB_CTX_new();
mac = EVP_MAC_fetch(library_context, "HMAC", propq);
mctx = EVP_MAC_CTX_new(mac);
*p++ = OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_DIGEST, digest_name, sizeof(digest_name));
*p = OSSL_PARAM_construct_end();
EVP_MAC_init(mctx, key, key_len, params);
EVP_MAC_update(mctx, data, data_len);
EVP_MAC_final(mctx, NULL, &out_len, 0);
*out = OPENSSL_malloc(out_len);
EVP_MAC_final(mctx, *out, &out_len, out_len);
EVP_MD_CTX_free(digest_context);
EVP_MAC_CTX_free(mctx);
EVP_MAC_free(mac);
OSSL_LIB_CTX_free(library_context);
return out_len;
}
unsigned char* digest_raw(unsigned char* digest_name, unsigned char* msg, size_t msg_len, size_t *out_len_ptr)
{
unsigned char *out = NULL;
const EVP_MD *digest;
digest = EVP_get_digestbyname(digest_name);
*out_len_ptr = EVP_MD_get_size(digest);
out = OPENSSL_malloc(*out_len_ptr);
EVP_Digest(msg, msg_len, out, (unsigned int *) out_len_ptr, digest, NULL);
return out;
}
unsigned char * bin2hex(const unsigned char * bin, size_t bin_len)
{
unsigned char *out = NULL;
size_t out_len;
size_t n = bin_len*2 + 1;
out = OPENSSL_malloc(n);
OPENSSL_buf2hexstr_ex(out, n, &out_len, bin, bin_len, '\0');
return out;
}
unsigned char* export_pubkey(EVP_PKEY *priv_pkey)
{
unsigned char *pubkey = NULL;
size_t pubkey_len;
unsigned char *pub_hex = NULL;
pubkey_len = EVP_PKEY_get1_encoded_public_key(priv_pkey, &pubkey);
pub_hex = bin2hex(pubkey, pubkey_len);
if(pubkey) OPENSSL_free(pubkey);
return pub_hex;
}
ec_keypair_t * gen_ec_keypair(unsigned char* group_name){
ec_keypair_t *out = (ec_keypair_t *)malloc(sizeof(ec_keypair_t));
BN_CTX * bnctx= BN_CTX_new();
int nid = OBJ_sn2nid(group_name);
EC_GROUP *group = EC_GROUP_new_by_curve_name(nid);
EVP_PKEY_CTX* ctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL);
EVP_PKEY_keygen_init(ctx);
EVP_PKEY_CTX_set_ec_paramgen_curve_nid(ctx, nid);
EVP_PKEY *xa_pkey = EVP_PKEY_new();
EVP_PKEY_keygen(ctx, &xa_pkey);
// PEM_write_PrivateKey(stdout, xa_pkey, NULL, NULL, 0, NULL, NULL);
unsigned char *ya_hex = export_pubkey(xa_pkey);
//printf("pub_hex: %s\n", ya_hex);
EVP_PKEY *ya_pkey=evp_pkey_from_point_hex(group, ya_hex, bnctx);
// PEM_write_PUBKEY(stdout, ya_pkey);
size_t ya_len;
unsigned char* ya = OPENSSL_hexstr2buf(ya_hex, &ya_len);
out->priv = xa_pkey;
out->pub = ya_pkey;
out->pub_hex = ya_hex;
out->pub_bin = ya;
out->pub_bin_len = ya_len;
EC_GROUP_free(group);
EVP_PKEY_CTX_free(ctx);
BN_CTX_free(bnctx);
return out;
}
int hkdf_raw(int mode, unsigned char *digest_name, unsigned char *ikm, size_t ikm_len, unsigned char *salt, size_t salt_len, unsigned char *info, size_t info_len, unsigned char **okm, size_t okm_len )
{
EVP_KDF *kdf = NULL;
EVP_KDF_CTX *kctx = NULL;
OSSL_PARAM params[6], *p = params;
OSSL_LIB_CTX *library_context = NULL;
library_context = OSSL_LIB_CTX_new();
kdf = EVP_KDF_fetch(library_context, "HKDF", NULL);
kctx = EVP_KDF_CTX_new(kdf);
*p++ = OSSL_PARAM_construct_int(OSSL_KDF_PARAM_MODE, &mode);
*p++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST, digest_name, 0);
*p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_KEY, ikm, ikm_len);
*p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_INFO, info, info_len);
*p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SALT, salt, salt_len);
*p = OSSL_PARAM_construct_end();
*okm = OPENSSL_malloc(okm_len);
if (EVP_KDF_derive(kctx, *okm, okm_len, params) != 1) {
OPENSSL_free(*okm);
okm_len = -1;
}
EVP_KDF_CTX_free(kctx);
EVP_KDF_free(kdf);
OSSL_LIB_CTX_free(library_context);
return okm_len;
}
EVP_PKEY* pubhex2pkey(unsigned char* group_name, unsigned char* yb_hex){
BN_CTX *bnctx = BN_CTX_new();
int nid = OBJ_sn2nid(group_name);
EC_GROUP *group = EC_GROUP_new_by_curve_name(nid);
EVP_PKEY *yb_pkey=evp_pkey_from_point_hex(group, yb_hex, bnctx);
BN_CTX_free(bnctx);
EC_GROUP_free(group);
return yb_pkey;
}
unsigned char* ecdh_raw(EVP_PKEY *priv, EVP_PKEY *peer_pub, size_t *z_len_ptr)
{
unsigned char* z=NULL;
EVP_PKEY_CTX *ctx;
ctx = EVP_PKEY_CTX_new(priv, NULL);
EVP_PKEY_derive_init(ctx);
EVP_PKEY_derive_set_peer(ctx, peer_pub);
EVP_PKEY_derive(ctx, NULL, z_len_ptr);
z = OPENSSL_malloc(*z_len_ptr);
EVP_PKEY_derive(ctx, z, z_len_ptr);
EVP_PKEY_CTX_free(ctx);
return z;
}
int LabeledExpand(unsigned char *suite_id, size_t suite_id_len, unsigned char* prk, size_t prk_len, unsigned char* label, size_t label_len, unsigned char* info, size_t info_len, size_t okm_len, unsigned char** okm){
unsigned char pre[] = { okm_len >> 8, okm_len & 0xff, 'H', 'P', 'K', 'E', '-', 'v', '1' };
size_t pre_len = strlen(pre);
unsigned char *labeled_info;
size_t labeled_info_len = pre_len + suite_id_len + label_len + info_len;
labeled_info = OPENSSL_malloc(labeled_info_len);
memcpy(labeled_info, pre, pre_len);
memcpy(labeled_info+pre_len, suite_id, suite_id_len);
memcpy(labeled_info+pre_len+suite_id_len, label, label_len);
memcpy(labeled_info+pre_len+suite_id_len+label_len, info, info_len);
unsigned char salt[] = "";
int out_len = hkdf_raw(2, "SHA256", prk, prk_len, salt, strlen(salt), labeled_info, labeled_info_len, okm, okm_len);
//BIO_dump_indent_fp(stdout, *okm, out_len, 2);
OPENSSL_free(labeled_info);
return out_len;
}
int LabeledExtract(unsigned char *suite_id, size_t suite_id_len, unsigned char* salt, size_t salt_len, unsigned char *label, size_t label_len, unsigned char* ikm, size_t ikm_len, size_t out_len, unsigned char **out)
{
unsigned char pre[] = "HPKE-v1";
size_t pre_len = strlen(pre);
unsigned char info[] = "";
unsigned char *labeled_ikm;
size_t labeled_ikm_len = pre_len + suite_id_len + label_len + ikm_len;
labeled_ikm = OPENSSL_malloc(labeled_ikm_len);
memcpy(labeled_ikm, pre, pre_len);
memcpy(labeled_ikm+pre_len, suite_id, suite_id_len);
memcpy(labeled_ikm+pre_len+suite_id_len, label, label_len);
memcpy(labeled_ikm+pre_len+suite_id_len+label_len, ikm, ikm_len);
out_len = hkdf_raw(1, "SHA256", labeled_ikm, labeled_ikm_len, salt, salt_len, info, strlen(info), out, out_len);
//BIO_dump_indent_fp(stdout, *out, out_len, 2);
OPENSSL_free(labeled_ikm);
return out_len;
}
int ExtractAndExpand(unsigned char *suite_id, size_t suite_id_len, unsigned char* dh, size_t dh_len, unsigned char *kem_context, size_t kem_context_len, unsigned char **out)
{
//printf("prk:\n");
unsigned char *eae_prk;
size_t eae_prk_len;
unsigned char salt[] ="";
unsigned char label_prk[] = "eae_prk";
eae_prk_len = LabeledExtract(suite_id, suite_id_len, salt, strlen(salt), label_prk, strlen(label_prk), dh, dh_len, 32, &eae_prk);
//printf("ss:\n");
unsigned char label_ss[] = "shared_secret";
size_t ss_len = LabeledExpand(suite_id, suite_id_len, eae_prk, eae_prk_len, label_ss, strlen(label_ss), kem_context, kem_context_len, 32, out);
OPENSSL_free(eae_prk);
return ss_len;
}
int hpke_nonce_xor(size_t nonce_len, uint64_t seq, uint8_t* base_nonce, uint8_t **out_nonce_ptr)
{
*out_nonce_ptr = OPENSSL_malloc(nonce_len);
uint8_t *out_nonce = *out_nonce_ptr;
memset(out_nonce, 0, nonce_len);
uint64_t seq_copy = seq;
for (size_t i = 0; i < 8; i++) {
out_nonce[nonce_len - i - 1] = seq_copy & 0xff;
seq_copy >>= 8;
}
for (size_t i = 0; i < nonce_len; i++) {
out_nonce[i] ^= base_nonce[i];
}
return nonce_len;
}
imessage_t* imessage_enc_raw(unsigned char* group_name, unsigned char* digest_name, unsigned char* sig_name, ec_keypair_t *ec_a, EVP_PKEY *yb_rsa_pkey, unsigned char* msg, size_t msg_len)
{
//printf("88-bits L:");
BIGNUM *L_bn=BN_new();
BN_rand(L_bn, 88, 0, 0);
unsigned char *L = OPENSSL_malloc(88);
int L_len = BN_bn2bin(L_bn, L);
//BIO_dump_indent_fp(stdout, L, L_len, 2);
//printf("h_bin:\n");
unsigned char *yb_bin;
size_t yb_bin_len = EVP_PKEY_get1_encoded_public_key(yb_rsa_pkey, &yb_bin);
unsigned char *h_bin;
size_t h_bin_len = hmac_raw3(digest_name, L, L_len, ec_a->pub_bin, ec_a->pub_bin_len, yb_bin, yb_bin_len, msg, msg_len, &h_bin);
//BIO_dump_indent_fp(stdout, h_bin, h_bin_len, 2);
//printf("k:\n");
unsigned char *k;
size_t k_len = 16;
k =OPENSSL_malloc(k_len);
memcpy(k, L, L_len);
memcpy(k + L_len, h_bin, 5);
//BIO_dump_indent_fp(stdout, k, k_len, 2);
//printf("iv:\n");
BIGNUM *iv_bn=BN_new();
BN_rand(iv_bn, 128, 0, 0);
unsigned char *iv = OPENSSL_malloc(128);
int iv_len = BN_bn2bin(iv_bn, iv);
//BIO_dump_indent_fp(stdout, iv, iv_len, 2);
//printf("c1:\n");
unsigned char* c1;
int c1_len = aes_ctr_raw("aes-128-ctr", msg, msg_len, k, iv, iv_len, &c1, 1);
//BIO_dump_indent_fp(stdout, c1, c1_len, 2);
//printf("c2:\n");
unsigned char *c2;
size_t c2_len = rsa_oaep_encrypt(digest_name, yb_rsa_pkey, k, k_len, &c2);
//BIO_dump_indent_fp(stdout, c2, c2_len, 2);
//printf("s:\n");
unsigned char *sig;
const char *propq = NULL;
OSSL_LIB_CTX *libctx = NULL;
size_t sig_len = 0;
/*unsigned char *sig_value = NULL;*/
EVP_MD_CTX *sign_context = NULL;
libctx = OSSL_LIB_CTX_new();
sign_context = EVP_MD_CTX_new();
EVP_DigestSignInit_ex(sign_context, NULL, sig_name, libctx, NULL, ec_a->priv, NULL);
EVP_DigestSignUpdate(sign_context, iv, iv_len);
EVP_DigestSignUpdate(sign_context, c1, c1_len);
EVP_DigestSignUpdate(sign_context, c2, c2_len);
EVP_DigestSignFinal(sign_context, NULL, &sig_len);
sig = OPENSSL_malloc(sig_len);
if (!EVP_DigestSignFinal(sign_context, sig, &sig_len)){
OPENSSL_free(sig);
sig_len = -1;
}
EVP_MD_CTX_free(sign_context);
OSSL_LIB_CTX_free(libctx);
//BIO_dump_indent_fp(stdout, sig, sig_len, 2);
imessage_t *out = (imessage_t *)malloc(sizeof(imessage_t));
out->iv = iv;
out->iv_len = iv_len;
out->c1 = c1;
out->c1_len = c1_len;
out->c2 = c2;
out->c2_len = c2_len;
out->sig = sig;
out->sig_len = sig_len;
OPENSSL_free(L);
/*OPENSSL_free(yb_bin);*/
OPENSSL_free(h_bin);
OPENSSL_free(k);
return out;
}
int imessage_dec_raw(unsigned char* group_name, unsigned char* digest_name, unsigned char* sig_name, EVP_PKEY *xb_rsa_pkey, EVP_PKEY *ya_pkey, imessage_t *c, unsigned char** msg)
{
BN_CTX *bnctx = BN_CTX_new();
int nid = OBJ_sn2nid(group_name);
EC_GROUP *group = EC_GROUP_new_by_curve_name(nid);
const char *propq = NULL;
OSSL_LIB_CTX *libctx = NULL;
EVP_MD_CTX *verify_context = NULL;
int ret = 0;
libctx = OSSL_LIB_CTX_new();
verify_context = EVP_MD_CTX_new();
EVP_DigestVerifyInit_ex(verify_context, NULL, sig_name, libctx, NULL, ya_pkey, NULL);
EVP_DigestVerifyUpdate(verify_context, c->iv, c->iv_len);
EVP_DigestVerifyUpdate(verify_context, c->c1, c->c1_len);
EVP_DigestVerifyUpdate(verify_context, c->c2, c->c2_len);
if (EVP_DigestVerifyFinal(verify_context, c->sig, c->sig_len)) {
ret = 1;
}
EVP_MD_CTX_free(verify_context);
OSSL_LIB_CTX_free(libctx);
OPENSSL_free(bnctx);
OPENSSL_free(group);
if(ret!=1)
return -1;
//printf("imessage's ecdsa verify: success!\n");
//printf("rsa dec k :\n");
unsigned char *k;
size_t k_len = rsa_oaep_decrypt(digest_name, xb_rsa_pkey, c->c2, c->c2_len, &k);
//BIO_dump_indent_fp(stdout, k, k_len, 2);
unsigned char k_tail[5];
memcpy(k_tail, k+11, 5);
//printf("dec msg:\n");
size_t msg_len;
msg_len = aes_ctr_raw("aes-128-ctr", c->c1, c->c1_len, k, c->iv, c->iv_len, msg, 0);
//BIO_dump_indent_fp(stdout, *msg, msg_len, 2);
//printf("h_bin:\n");
unsigned char *yb_bin;
size_t yb_bin_len = EVP_PKEY_get1_encoded_public_key(xb_rsa_pkey, &yb_bin);
unsigned char *ya_bin;
size_t ya_bin_len = EVP_PKEY_get1_encoded_public_key(ya_pkey, &ya_bin);
unsigned char *h_bin;
size_t h_bin_len = hmac_raw3(digest_name, k, 11, ya_bin, ya_bin_len, yb_bin, yb_bin_len, *msg, msg_len, &h_bin);
//BIO_dump_indent_fp(stdout, h_bin, h_bin_len, 2);
unsigned char h_head[5];
memcpy(h_head, h_bin, 5);
if(memcmp(k_tail, h_head, 5)==0){
//printf("imessage's hmac verify: success!\n");
}else{
msg_len = -1;
OPENSSL_free(*msg);
}
OPENSSL_free(k);
/*OPENSSL_free(yb_bin);*/
/*OPENSSL_free(ya_bin);*/
OPENSSL_free(h_bin);
return msg_len;
}
hpke_enc_t* hpke_auth_enc_raw(unsigned char* group_name, unsigned char* digest_name, ec_keypair_t *ec_a, unsigned char* yb_hex, unsigned char* msg, size_t msg_len)
{
unsigned char psk[] = "";
unsigned char psk_id[] = "";
unsigned char info[] = "";
uint64_t seq = 0;
//printf("xe:\n");
ec_keypair_t *ec_e = gen_ec_keypair(group_name);
//printf("yb:%s\n", yb_hex);
EVP_PKEY *yb_pkey=pubhex2pkey(group_name, yb_hex);
size_t yb_len;
unsigned char* yb = OPENSSL_hexstr2buf(yb_hex, &yb_len);
//printf("z_ER:\n");
unsigned char *zER;
size_t zERlen;
zER = ecdh_raw(ec_e->priv, yb_pkey, &zERlen);
//BIO_dump_indent_fp(stdout, zER, zERlen, 2);
//printf("z_SR:\n");
unsigned char *zSR;
size_t zSRlen;
zSR = ecdh_raw(ec_a->priv, yb_pkey, &zSRlen);
//BIO_dump_indent_fp(stdout, zSR, zSRlen, 2);
//printf("dh:\n");
unsigned char *dh;
size_t dh_len = zERlen + zSRlen;
dh =OPENSSL_malloc(dh_len);
memcpy(dh, zER, zERlen);
memcpy(dh + zERlen, zSR, zSRlen);
//BIO_dump_indent_fp(stdout, dh, dh_len, 2);
//printf("kem_context:\n");
unsigned char *kem_context;
size_t kem_context_len = ec_e->pub_bin_len + yb_len + ec_a->pub_bin_len;
kem_context = OPENSSL_malloc(kem_context_len);
memcpy(kem_context, ec_e->pub_bin, ec_e->pub_bin_len);
memcpy(kem_context + ec_e->pub_bin_len, yb, yb_len);
memcpy(kem_context + ec_e->pub_bin_len + ec_a->pub_bin_len, ec_a->pub_bin, ec_a->pub_bin_len);
//BIO_dump_indent_fp(stdout, kem_context, kem_context_len, 2);
//printf("shared_secret:\n");
int kem_id = 0x0010;
unsigned char suite_id_kem[] = { 'K', 'E', 'M', kem_id >> 8, kem_id & 0xff };
unsigned char* shared_secret;
size_t shared_secret_len = ExtractAndExpand(suite_id_kem, sizeof(suite_id_kem), dh, dh_len, kem_context, kem_context_len, &shared_secret);
int kdf_id = 1;
/*int aead_id = 2; //aes-256-gcm*/
int aead_id = 1; //aes-128-gcm
unsigned char suite_id[] = { 'H', 'P', 'K', 'E',
kem_id >> 8, kem_id & 0xff ,
kdf_id >> 8, kdf_id & 0xff ,
aead_id >> 8, aead_id & 0xff ,
};
//printf("psk_id_hash:\n");
unsigned char *psk_id_hash;
int psk_id_hash_len = LabeledExtract(suite_id, sizeof(suite_id), "", strlen(""), "psk_id_hash", strlen("psk_id_hash"), psk_id, strlen(psk_id), 32, &psk_id_hash);
//printf("info_hash:\n");
unsigned char *info_hash;
int info_hash_len = LabeledExtract(suite_id, sizeof(suite_id), "", strlen(""), "info_hash", strlen("info_hash"), info, strlen(info), 32, &info_hash);
//printf("key_schedule_context:\n");
unsigned char mode[] = { 0x02, };
unsigned char *key_schedule_context;
int key_schedule_context_len = sizeof(mode) + psk_id_hash_len + info_hash_len;
key_schedule_context = OPENSSL_malloc(key_schedule_context_len);
memcpy(key_schedule_context, mode, sizeof(mode));
memcpy(key_schedule_context +sizeof(mode), psk_id_hash, psk_id_hash_len);
memcpy(key_schedule_context +sizeof(mode)+psk_id_hash_len, info_hash, info_hash_len);
//BIO_dump_indent_fp(stdout, key_schedule_context, key_schedule_context_len, 2);
//printf("secret:\n");
unsigned char *secret;
size_t secret_len = LabeledExtract(suite_id, sizeof(suite_id), shared_secret, shared_secret_len, "secret", strlen("secret"), psk, strlen(psk), 32, &secret);
//printf("key:\n");
unsigned char *key;
size_t key_len = LabeledExpand(suite_id, sizeof(suite_id), secret, secret_len, "key", strlen("key"), key_schedule_context, key_schedule_context_len, 16, &key);
//printf("base_nonce:\n");
unsigned char *base_nonce;
size_t base_nonce_len = LabeledExpand(suite_id, sizeof(suite_id), secret, secret_len, "base_nonce", strlen("base_nonce"), key_schedule_context, key_schedule_context_len, 12, &base_nonce);
//printf("nonce:\n");
uint8_t *nonce;
hpke_nonce_xor(12, seq, base_nonce, &nonce);
//BIO_dump_indent_fp(stdout, nonce, base_nonce_len, 2);
//printf("msg:\n");
//BIO_dump_indent_fp(stdout, msg, msg_len, 2);
//printf("enc ciphertext:\n");
unsigned char *ciphertext=NULL;
unsigned char *tag=NULL;
unsigned char aad[] = "";
size_t tag_len = 16;
int ciphertext_len = aead_encrypt_raw("aes-128-gcm", msg, msg_len, aad, strlen(aad), key, nonce, base_nonce_len, &ciphertext, &tag, tag_len);
/*int ciphertext_len = aes_ctr_raw("aes-256-ctr", msg, msg_len, key, nonce, base_nonce_len, &ciphertext, 1);*/
//BIO_dump_indent_fp(stdout, ciphertext, ciphertext_len, 2);
//printf("enc tag:\n");
//BIO_dump_indent_fp(stdout, tag, tag_len, 2);
hpke_enc_t *out = (hpke_enc_t *)malloc(sizeof(hpke_enc_t));
out->ye = ec_e->pub_bin;
out->ye_len = ec_e->pub_bin_len;
out->ciphertext = ciphertext;
out->ciphertext_len = ciphertext_len;
out->tag = tag;
out->tag_len = tag_len;
OPENSSL_free(base_nonce);
OPENSSL_free(key);
OPENSSL_free(secret);
OPENSSL_free(key_schedule_context);
OPENSSL_free(info_hash);
OPENSSL_free(psk_id_hash);
OPENSSL_free(shared_secret);
OPENSSL_free(kem_context);
OPENSSL_free(dh);
OPENSSL_free(zER);
OPENSSL_free(zSR);
EVP_PKEY_free(yb_pkey);
EVP_PKEY_free(ec_e->priv);
EVP_PKEY_free(ec_e->pub);
OPENSSL_free(ec_e->pub_hex);
return out;
}
size_t hpke_auth_dec_raw(unsigned char* group_name, unsigned char* digest_name, EVP_PKEY *xb_pkey, EVP_PKEY *ya_pkey, hpke_enc_t *c, unsigned char** msg)
{
unsigned char psk[] = "";
unsigned char psk_id[] = "";
unsigned char info[] = "";
uint64_t seq = 0;
BN_CTX *bnctx = BN_CTX_new();
int nid = OBJ_sn2nid(group_name);
EC_GROUP *group = EC_GROUP_new_by_curve_name(nid);
unsigned char* ye_hex = bin2hex(c->ye, c->ye_len);
EVP_PKEY *ye_pkey=evp_pkey_from_point_hex(group, ye_hex, bnctx);
//printf("z_ER:\n");
unsigned char *zER;
size_t zERlen;
zER = ecdh_raw(xb_pkey, ye_pkey, &zERlen);
//BIO_dump_indent_fp(stdout, zER, zERlen, 2);
//printf("z_SR:\n");
unsigned char *zSR;
size_t zSRlen;
zSR = ecdh_raw(xb_pkey, ya_pkey, &zSRlen);
//BIO_dump_indent_fp(stdout, zSR, zSRlen, 2);
//printf("dh:\n");
unsigned char *dh;
size_t dh_len = zERlen + zSRlen;
dh =OPENSSL_malloc(dh_len);
memcpy(dh, zER, zERlen);
memcpy(dh + zERlen, zSR, zSRlen);
//BIO_dump_indent_fp(stdout, dh, dh_len, 2);
//printf("kem_context:\n");
unsigned char *kem_context;
unsigned char *yb_bin;
size_t yb_bin_len = EVP_PKEY_get1_encoded_public_key(xb_pkey, &yb_bin);
unsigned char *ya_bin;
size_t ya_bin_len = EVP_PKEY_get1_encoded_public_key(ya_pkey, &ya_bin);
size_t kem_context_len = c->ye_len + yb_bin_len + ya_bin_len;
kem_context = OPENSSL_malloc(kem_context_len);
memcpy(kem_context, c->ye, c->ye_len);
memcpy(kem_context + c->ye_len, yb_bin, yb_bin_len);
memcpy(kem_context + c->ye_len + yb_bin_len, ya_bin, ya_bin_len);
//BIO_dump_indent_fp(stdout, kem_context, kem_context_len, 2);
//printf("shared_secret:\n");
int kem_id = 0x0010;
unsigned char suite_id_kem[] = { 'K', 'E', 'M', kem_id >> 8, kem_id & 0xff };
unsigned char* shared_secret;
size_t shared_secret_len = ExtractAndExpand(suite_id_kem, sizeof(suite_id_kem), dh, dh_len, kem_context, kem_context_len, &shared_secret);
int kdf_id = 1;
/*int aead_id = 2; //aes-256-gcm*/
int aead_id = 1; //aes-128-gcm
unsigned char suite_id[] = { 'H', 'P', 'K', 'E',
kem_id >> 8, kem_id & 0xff ,
kdf_id >> 8, kdf_id & 0xff ,
aead_id >> 8, aead_id & 0xff ,
};
//printf("psk_id_hash:\n");
unsigned char *psk_id_hash;
int psk_id_hash_len = LabeledExtract(suite_id, sizeof(suite_id), "", strlen(""), "psk_id_hash", strlen("psk_id_hash"), psk_id, strlen(psk_id), 32, &psk_id_hash);