src/tls/rsa.c

24 	int private_key; /* whether private key is set */
62  * crypto_rsa_import_public_key - Import an RSA public key
63  * @buf: Key buffer (DER encoded RSA public key)
65  * Returns: Pointer to the public key or %NULL on failure
70 	struct crypto_rsa_key *key;
74 	key = os_zalloc(sizeof(*key));
75 	if (key == NULL)
78 	key->n = bignum_init();
79 	key->e = bignum_init();
80 	if (key->n == NULL || key->e == NULL) {
81 		crypto_rsa_free(key);
97 			   "(public key) - found class %d tag 0x%x",
104 	pos = crypto_rsa_parse_integer(pos, end, key->n);
105 	pos = crypto_rsa_parse_integer(pos, end, key->e);
112 			    "RSA: Extra data in public key SEQUENCE",
117 	return key;
120 	crypto_rsa_free(key);
126  * crypto_rsa_import_private_key - Import an RSA private key
127  * @buf: Key buffer (DER encoded RSA private key)
129  * Returns: Pointer to the private key or %NULL on failure
134 	struct crypto_rsa_key *key;
139 	key = os_zalloc(sizeof(*key));
140 	if (key == NULL)
143 	key->private_key = 1;
145 	key->n = bignum_init();
146 	key->e = bignum_init();
147 	key->d = bignum_init();
148 	key->p = bignum_init();
149 	key->q = bignum_init();
150 	key->dmp1 = bignum_init();
151 	key->dmq1 = bignum_init();
152 	key->iqmp = bignum_init();
154 	if (key->n == NULL || key->e == NULL || key->d == NULL ||
155 	    key->p == NULL || key->q == NULL || key->dmp1 == NULL ||
156 	    key->dmq1 == NULL || key->iqmp == NULL) {
157 		crypto_rsa_free(key);
181 			   "(public key) - found class %d tag 0x%x",
194 			   "beginning of private key; not found");
200 	pos = crypto_rsa_parse_integer(pos, end, key->n);
201 	pos = crypto_rsa_parse_integer(pos, end, key->e);
202 	pos = crypto_rsa_parse_integer(pos, end, key->d);
203 	pos = crypto_rsa_parse_integer(pos, end, key->p);
204 	pos = crypto_rsa_parse_integer(pos, end, key->q);
205 	pos = crypto_rsa_parse_integer(pos, end, key->dmp1);
206 	pos = crypto_rsa_parse_integer(pos, end, key->dmq1);
207 	pos = crypto_rsa_parse_integer(pos, end, key->iqmp);
214 			    "RSA: Extra data in public key SEQUENCE",
219 	return key;
222 	crypto_rsa_free(key);
228  * crypto_rsa_get_modulus_len - Get the modulus length of the RSA key
229  * @key: RSA key
230  * Returns: Modulus length of the key
232 size_t crypto_rsa_get_modulus_len(struct crypto_rsa_key *key)
234 	return bignum_get_unsigned_bin_len(key->n);
244  * @key: RSA key
245  * @use_private: 1 = Use RSA private key, 0 = Use RSA public key
249 		       struct crypto_rsa_key *key, int use_private)
255 	if (use_private && !key->private_key)
264 	if (bignum_cmp(key->n, tmp) < 0) {
265 		/* Too large input value for the RSA key modulus */
289 		if (bignum_exptmod(tmp, key->dmp1, key->p, a) < 0)
293 		if (bignum_exptmod(tmp, key->dmq1, key->q, b) < 0)
298 		    bignum_mulmod(tmp, key->iqmp, key->p, tmp) < 0)
302 		if (bignum_mul(tmp, key->q, tmp) < 0 ||
308 		if (bignum_exptmod(tmp, key->e, key->n, tmp) < 0)
312 	modlen = crypto_rsa_get_modulus_len(key);
339  * crypto_rsa_free - Free RSA key
340  * @key: RSA key to be freed
342  * This function frees an RSA key imported with either
345 void crypto_rsa_free(struct crypto_rsa_key *key)
347 	if (key) {
348 		bignum_deinit(key->n);
349 		bignum_deinit(key->e);
350 		bignum_deinit(key->d);
351 		bignum_deinit(key->p);
352 		bignum_deinit(key->q);
353 		bignum_deinit(key->dmp1);
354 		bignum_deinit(key->dmq1);
355 		bignum_deinit(key->iqmp);
356 		os_free(key);