2 * Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 #include <openssl/evp.h>
11 #include "internal/refcount.h"
14 * Don't free up md_ctx->pctx in EVP_MD_CTX_reset, use the reserved flag
17 #define EVP_MD_CTX_FLAG_KEEP_PKEY_CTX 0x0400
19 struct evp_pkey_ctx_st {
20 /* Method associated with this operation */
21 const EVP_PKEY_METHOD *pmeth;
22 /* Engine that implements this method or NULL if builtin */
24 /* Key: may be NULL */
26 /* Peer key for key agreement, may be NULL */
28 /* Actual operation */
30 /* Algorithm specific data */
32 /* Application specific data */
35 EVP_PKEY_gen_cb *pkey_gencb;
36 /* implementation specific keygen data */
38 int keygen_info_count;
39 } /* EVP_PKEY_CTX */ ;
41 #define EVP_PKEY_FLAG_DYNAMIC 1
43 struct evp_pkey_method_st {
46 int (*init) (EVP_PKEY_CTX *ctx);
47 int (*copy) (EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src);
48 void (*cleanup) (EVP_PKEY_CTX *ctx);
49 int (*paramgen_init) (EVP_PKEY_CTX *ctx);
50 int (*paramgen) (EVP_PKEY_CTX *ctx, EVP_PKEY *pkey);
51 int (*keygen_init) (EVP_PKEY_CTX *ctx);
52 int (*keygen) (EVP_PKEY_CTX *ctx, EVP_PKEY *pkey);
53 int (*sign_init) (EVP_PKEY_CTX *ctx);
54 int (*sign) (EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
55 const unsigned char *tbs, size_t tbslen);
56 int (*verify_init) (EVP_PKEY_CTX *ctx);
57 int (*verify) (EVP_PKEY_CTX *ctx,
58 const unsigned char *sig, size_t siglen,
59 const unsigned char *tbs, size_t tbslen);
60 int (*verify_recover_init) (EVP_PKEY_CTX *ctx);
61 int (*verify_recover) (EVP_PKEY_CTX *ctx,
62 unsigned char *rout, size_t *routlen,
63 const unsigned char *sig, size_t siglen);
64 int (*signctx_init) (EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx);
65 int (*signctx) (EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
67 int (*verifyctx_init) (EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx);
68 int (*verifyctx) (EVP_PKEY_CTX *ctx, const unsigned char *sig, int siglen,
70 int (*encrypt_init) (EVP_PKEY_CTX *ctx);
71 int (*encrypt) (EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
72 const unsigned char *in, size_t inlen);
73 int (*decrypt_init) (EVP_PKEY_CTX *ctx);
74 int (*decrypt) (EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
75 const unsigned char *in, size_t inlen);
76 int (*derive_init) (EVP_PKEY_CTX *ctx);
77 int (*derive) (EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen);
78 int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1, void *p2);
79 int (*ctrl_str) (EVP_PKEY_CTX *ctx, const char *type, const char *value);
80 int (*digestsign) (EVP_MD_CTX *ctx, unsigned char *sig, size_t *siglen,
81 const unsigned char *tbs, size_t tbslen);
82 int (*digestverify) (EVP_MD_CTX *ctx, const unsigned char *sig,
83 size_t siglen, const unsigned char *tbs,
85 int (*check) (EVP_PKEY *pkey);
86 int (*public_check) (EVP_PKEY *pkey);
87 int (*param_check) (EVP_PKEY *pkey);
89 int (*digest_custom) (EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx);
90 } /* EVP_PKEY_METHOD */ ;
92 DEFINE_STACK_OF_CONST(EVP_PKEY_METHOD)
94 void evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx);
96 extern const EVP_PKEY_METHOD cmac_pkey_meth;
97 extern const EVP_PKEY_METHOD dh_pkey_meth;
98 extern const EVP_PKEY_METHOD dhx_pkey_meth;
99 extern const EVP_PKEY_METHOD dsa_pkey_meth;
100 extern const EVP_PKEY_METHOD ec_pkey_meth;
101 extern const EVP_PKEY_METHOD sm2_pkey_meth;
102 extern const EVP_PKEY_METHOD ecx25519_pkey_meth;
103 extern const EVP_PKEY_METHOD ecx448_pkey_meth;
104 extern const EVP_PKEY_METHOD ed25519_pkey_meth;
105 extern const EVP_PKEY_METHOD ed448_pkey_meth;
106 extern const EVP_PKEY_METHOD hmac_pkey_meth;
107 extern const EVP_PKEY_METHOD rsa_pkey_meth;
108 extern const EVP_PKEY_METHOD rsa_pss_pkey_meth;
109 extern const EVP_PKEY_METHOD scrypt_pkey_meth;
110 extern const EVP_PKEY_METHOD tls1_prf_pkey_meth;
111 extern const EVP_PKEY_METHOD hkdf_pkey_meth;
112 extern const EVP_PKEY_METHOD poly1305_pkey_meth;
113 extern const EVP_PKEY_METHOD siphash_pkey_meth;
115 /* struct evp_mac_impl_st is defined by the implementation */
116 typedef struct evp_mac_impl_st EVP_MAC_IMPL;
119 EVP_MAC_IMPL *(*new) (void);
120 int (*copy) (EVP_MAC_IMPL *macdst, EVP_MAC_IMPL *macsrc);
121 void (*free) (EVP_MAC_IMPL *macctx);
122 size_t (*size) (EVP_MAC_IMPL *macctx);
123 int (*init) (EVP_MAC_IMPL *macctx);
124 int (*update) (EVP_MAC_IMPL *macctx, const unsigned char *data,
126 int (*final) (EVP_MAC_IMPL *macctx, unsigned char *out);
127 int (*ctrl) (EVP_MAC_IMPL *macctx, int cmd, va_list args);
128 int (*ctrl_str) (EVP_MAC_IMPL *macctx, const char *type, const char *value);
131 extern const EVP_MAC cmac_meth;
132 extern const EVP_MAC gmac_meth;
133 extern const EVP_MAC hmac_meth;
134 extern const EVP_MAC siphash_meth;
137 * This function is internal for now, but can be made external when needed.
138 * The documentation would read:
140 * EVP_add_mac() adds the MAC implementation C<mac> to the internal
143 int EVP_add_mac(const EVP_MAC *mac);
150 int (*init) (EVP_MD_CTX *ctx);
151 int (*update) (EVP_MD_CTX *ctx, const void *data, size_t count);
152 int (*final) (EVP_MD_CTX *ctx, unsigned char *md);
153 int (*copy) (EVP_MD_CTX *to, const EVP_MD_CTX *from);
154 int (*cleanup) (EVP_MD_CTX *ctx);
156 int ctx_size; /* how big does the ctx->md_data need to be */
157 /* control function */
158 int (*md_ctrl) (EVP_MD_CTX *ctx, int cmd, int p1, void *p2);
161 struct evp_cipher_st {
164 /* Default value for variable length ciphers */
170 int (*init) (EVP_CIPHER_CTX *ctx, const unsigned char *key,
171 const unsigned char *iv, int enc);
172 /* encrypt/decrypt data */
173 int (*do_cipher) (EVP_CIPHER_CTX *ctx, unsigned char *out,
174 const unsigned char *in, size_t inl);
176 int (*cleanup) (EVP_CIPHER_CTX *);
177 /* how big ctx->cipher_data needs to be */
179 /* Populate a ASN1_TYPE with parameters */
180 int (*set_asn1_parameters) (EVP_CIPHER_CTX *, ASN1_TYPE *);
181 /* Get parameters from a ASN1_TYPE */
182 int (*get_asn1_parameters) (EVP_CIPHER_CTX *, ASN1_TYPE *);
183 /* Miscellaneous operations */
184 int (*ctrl) (EVP_CIPHER_CTX *, int type, int arg, void *ptr);
185 /* Application data */
189 /* Macros to code block cipher wrappers */
191 /* Wrapper functions for each cipher mode */
193 #define EVP_C_DATA(kstruct, ctx) \
194 ((kstruct *)EVP_CIPHER_CTX_get_cipher_data(ctx))
196 #define BLOCK_CIPHER_ecb_loop() \
198 bl = EVP_CIPHER_CTX_cipher(ctx)->block_size; \
199 if (inl < bl) return 1;\
201 for (i=0; i <= inl; i+=bl)
203 #define BLOCK_CIPHER_func_ecb(cname, cprefix, kstruct, ksched) \
204 static int cname##_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
206 BLOCK_CIPHER_ecb_loop() \
207 cprefix##_ecb_encrypt(in + i, out + i, &EVP_C_DATA(kstruct,ctx)->ksched, EVP_CIPHER_CTX_encrypting(ctx)); \
211 #define EVP_MAXCHUNK ((size_t)1<<(sizeof(long)*8-2))
213 #define BLOCK_CIPHER_func_ofb(cname, cprefix, cbits, kstruct, ksched) \
214 static int cname##_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
216 while(inl>=EVP_MAXCHUNK) {\
217 int num = EVP_CIPHER_CTX_num(ctx);\
218 cprefix##_ofb##cbits##_encrypt(in, out, (long)EVP_MAXCHUNK, &EVP_C_DATA(kstruct,ctx)->ksched, EVP_CIPHER_CTX_iv_noconst(ctx), &num); \
219 EVP_CIPHER_CTX_set_num(ctx, num);\
225 int num = EVP_CIPHER_CTX_num(ctx);\
226 cprefix##_ofb##cbits##_encrypt(in, out, (long)inl, &EVP_C_DATA(kstruct,ctx)->ksched, EVP_CIPHER_CTX_iv_noconst(ctx), &num); \
227 EVP_CIPHER_CTX_set_num(ctx, num);\
232 #define BLOCK_CIPHER_func_cbc(cname, cprefix, kstruct, ksched) \
233 static int cname##_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
235 while(inl>=EVP_MAXCHUNK) \
237 cprefix##_cbc_encrypt(in, out, (long)EVP_MAXCHUNK, &EVP_C_DATA(kstruct,ctx)->ksched, EVP_CIPHER_CTX_iv_noconst(ctx), EVP_CIPHER_CTX_encrypting(ctx));\
243 cprefix##_cbc_encrypt(in, out, (long)inl, &EVP_C_DATA(kstruct,ctx)->ksched, EVP_CIPHER_CTX_iv_noconst(ctx), EVP_CIPHER_CTX_encrypting(ctx));\
247 #define BLOCK_CIPHER_func_cfb(cname, cprefix, cbits, kstruct, ksched) \
248 static int cname##_cfb##cbits##_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
250 size_t chunk = EVP_MAXCHUNK;\
251 if (cbits == 1) chunk >>= 3;\
252 if (inl < chunk) chunk = inl;\
253 while (inl && inl >= chunk)\
255 int num = EVP_CIPHER_CTX_num(ctx);\
256 cprefix##_cfb##cbits##_encrypt(in, out, (long) \
258 && !EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS) \
259 ? chunk*8 : chunk), \
260 &EVP_C_DATA(kstruct, ctx)->ksched, EVP_CIPHER_CTX_iv_noconst(ctx),\
261 &num, EVP_CIPHER_CTX_encrypting(ctx));\
262 EVP_CIPHER_CTX_set_num(ctx, num);\
266 if (inl < chunk) chunk = inl;\
271 #define BLOCK_CIPHER_all_funcs(cname, cprefix, cbits, kstruct, ksched) \
272 BLOCK_CIPHER_func_cbc(cname, cprefix, kstruct, ksched) \
273 BLOCK_CIPHER_func_cfb(cname, cprefix, cbits, kstruct, ksched) \
274 BLOCK_CIPHER_func_ecb(cname, cprefix, kstruct, ksched) \
275 BLOCK_CIPHER_func_ofb(cname, cprefix, cbits, kstruct, ksched)
277 #define BLOCK_CIPHER_def1(cname, nmode, mode, MODE, kstruct, nid, block_size, \
278 key_len, iv_len, flags, init_key, cleanup, \
279 set_asn1, get_asn1, ctrl) \
280 static const EVP_CIPHER cname##_##mode = { \
281 nid##_##nmode, block_size, key_len, iv_len, \
282 flags | EVP_CIPH_##MODE##_MODE, \
284 cname##_##mode##_cipher, \
291 const EVP_CIPHER *EVP_##cname##_##mode(void) { return &cname##_##mode; }
293 #define BLOCK_CIPHER_def_cbc(cname, kstruct, nid, block_size, key_len, \
294 iv_len, flags, init_key, cleanup, set_asn1, \
296 BLOCK_CIPHER_def1(cname, cbc, cbc, CBC, kstruct, nid, block_size, key_len, \
297 iv_len, flags, init_key, cleanup, set_asn1, get_asn1, ctrl)
299 #define BLOCK_CIPHER_def_cfb(cname, kstruct, nid, key_len, \
300 iv_len, cbits, flags, init_key, cleanup, \
301 set_asn1, get_asn1, ctrl) \
302 BLOCK_CIPHER_def1(cname, cfb##cbits, cfb##cbits, CFB, kstruct, nid, 1, \
303 key_len, iv_len, flags, init_key, cleanup, set_asn1, \
306 #define BLOCK_CIPHER_def_ofb(cname, kstruct, nid, key_len, \
307 iv_len, cbits, flags, init_key, cleanup, \
308 set_asn1, get_asn1, ctrl) \
309 BLOCK_CIPHER_def1(cname, ofb##cbits, ofb, OFB, kstruct, nid, 1, \
310 key_len, iv_len, flags, init_key, cleanup, set_asn1, \
313 #define BLOCK_CIPHER_def_ecb(cname, kstruct, nid, block_size, key_len, \
314 flags, init_key, cleanup, set_asn1, \
316 BLOCK_CIPHER_def1(cname, ecb, ecb, ECB, kstruct, nid, block_size, key_len, \
317 0, flags, init_key, cleanup, set_asn1, get_asn1, ctrl)
319 #define BLOCK_CIPHER_defs(cname, kstruct, \
320 nid, block_size, key_len, iv_len, cbits, flags, \
321 init_key, cleanup, set_asn1, get_asn1, ctrl) \
322 BLOCK_CIPHER_def_cbc(cname, kstruct, nid, block_size, key_len, iv_len, flags, \
323 init_key, cleanup, set_asn1, get_asn1, ctrl) \
324 BLOCK_CIPHER_def_cfb(cname, kstruct, nid, key_len, iv_len, cbits, \
325 flags, init_key, cleanup, set_asn1, get_asn1, ctrl) \
326 BLOCK_CIPHER_def_ofb(cname, kstruct, nid, key_len, iv_len, cbits, \
327 flags, init_key, cleanup, set_asn1, get_asn1, ctrl) \
328 BLOCK_CIPHER_def_ecb(cname, kstruct, nid, block_size, key_len, flags, \
329 init_key, cleanup, set_asn1, get_asn1, ctrl)
332 #define BLOCK_CIPHER_defs(cname, kstruct, \
333 nid, block_size, key_len, iv_len, flags,\
334 init_key, cleanup, set_asn1, get_asn1, ctrl)\
335 static const EVP_CIPHER cname##_cbc = {\
336 nid##_cbc, block_size, key_len, iv_len, \
337 flags | EVP_CIPH_CBC_MODE,\
341 sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
342 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
347 const EVP_CIPHER *EVP_##cname##_cbc(void) { return &cname##_cbc; }\
348 static const EVP_CIPHER cname##_cfb = {\
349 nid##_cfb64, 1, key_len, iv_len, \
350 flags | EVP_CIPH_CFB_MODE,\
354 sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
355 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
360 const EVP_CIPHER *EVP_##cname##_cfb(void) { return &cname##_cfb; }\
361 static const EVP_CIPHER cname##_ofb = {\
362 nid##_ofb64, 1, key_len, iv_len, \
363 flags | EVP_CIPH_OFB_MODE,\
367 sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
368 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
373 const EVP_CIPHER *EVP_##cname##_ofb(void) { return &cname##_ofb; }\
374 static const EVP_CIPHER cname##_ecb = {\
375 nid##_ecb, block_size, key_len, iv_len, \
376 flags | EVP_CIPH_ECB_MODE,\
380 sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
381 sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
386 const EVP_CIPHER *EVP_##cname##_ecb(void) { return &cname##_ecb; }
389 #define IMPLEMENT_BLOCK_CIPHER(cname, ksched, cprefix, kstruct, nid, \
390 block_size, key_len, iv_len, cbits, \
392 cleanup, set_asn1, get_asn1, ctrl) \
393 BLOCK_CIPHER_all_funcs(cname, cprefix, cbits, kstruct, ksched) \
394 BLOCK_CIPHER_defs(cname, kstruct, nid, block_size, key_len, iv_len, \
395 cbits, flags, init_key, cleanup, set_asn1, \
398 #define IMPLEMENT_CFBR(cipher,cprefix,kstruct,ksched,keysize,cbits,iv_len,fl) \
399 BLOCK_CIPHER_func_cfb(cipher##_##keysize,cprefix,cbits,kstruct,ksched) \
400 BLOCK_CIPHER_def_cfb(cipher##_##keysize,kstruct, \
401 NID_##cipher##_##keysize, keysize/8, iv_len, cbits, \
402 (fl)|EVP_CIPH_FLAG_DEFAULT_ASN1, \
403 cipher##_init_key, NULL, NULL, NULL, NULL)
406 # ifndef OPENSSL_NO_EC
408 #define X25519_KEYLEN 32
409 #define X448_KEYLEN 56
410 #define ED448_KEYLEN 57
412 #define MAX_KEYLEN ED448_KEYLEN
415 unsigned char pubkey[MAX_KEYLEN];
416 unsigned char *privkey;
422 * Type needs to be a bit field Sub-type needs to be for variations on the
423 * method, as in, can it do arbitrary encryption....
428 CRYPTO_REF_COUNT references;
429 const EVP_PKEY_ASN1_METHOD *ameth;
431 ENGINE *pmeth_engine; /* If not NULL public key ENGINE to use */
434 # ifndef OPENSSL_NO_RSA
435 struct rsa_st *rsa; /* RSA */
437 # ifndef OPENSSL_NO_DSA
438 struct dsa_st *dsa; /* DSA */
440 # ifndef OPENSSL_NO_DH
441 struct dh_st *dh; /* DH */
443 # ifndef OPENSSL_NO_EC
444 struct ec_key_st *ec; /* ECC */
445 ECX_KEY *ecx; /* X25519, X448, Ed25519, Ed448 */
449 STACK_OF(X509_ATTRIBUTE) *attributes; /* [ 0 ] */
454 void openssl_add_all_ciphers_int(void);
455 void openssl_add_all_digests_int(void);
456 void openssl_add_all_macs_int(void);
457 void evp_cleanup_int(void);
458 void evp_app_cleanup_int(void);
460 /* Pulling defines out of C source files */
462 #define EVP_RC4_KEY_SIZE 16
463 #ifndef TLS1_1_VERSION
464 # define TLS1_1_VERSION 0x0302
467 void evp_encode_ctx_set_flags(EVP_ENCODE_CTX *ctx, unsigned int flags);
469 /* EVP_ENCODE_CTX flags */
470 /* Don't generate new lines when encoding */
471 #define EVP_ENCODE_CTX_NO_NEWLINES 1
472 /* Use the SRP base64 alphabet instead of the standard one */
473 #define EVP_ENCODE_CTX_USE_SRP_ALPHABET 2