diff options
Diffstat (limited to 'openssl/demos/engines/rsaref/rsaref.c')
| -rw-r--r-- | openssl/demos/engines/rsaref/rsaref.c | 713 |
1 files changed, 713 insertions, 0 deletions
diff --git a/openssl/demos/engines/rsaref/rsaref.c b/openssl/demos/engines/rsaref/rsaref.c new file mode 100644 index 0000000..498cc70 --- /dev/null +++ b/openssl/demos/engines/rsaref/rsaref.c @@ -0,0 +1,713 @@ +/* + * Demo of how to construct your own engine and using it. The basis of this + * engine is RSAref, an old reference of the RSA algorithm which can still be + * found a little here and there. + */ + +#include <stdio.h> +#include <string.h> +#include "./source/global.h" +#include "./source/rsaref.h" +#include "./source/rsa.h" +#include "./source/des.h" +#include <openssl/err.h> +#define OPENSSL_NO_MD2 +#define OPENSSL_NO_MD5 +#include <openssl/evp.h> +#include <openssl/bn.h> +#include <openssl/engine.h> + +#define RSAREF_LIB_NAME "rsaref engine" +#include "rsaref_err.c" + +/***************************************************************************** + *** Function declarations and global variable definitions *** + *****************************************************************************/ + +/***************************************************************************** + * Constants used when creating the ENGINE + **/ +static const char *engine_rsaref_id = "rsaref"; +static const char *engine_rsaref_name = "RSAref engine support"; + +/***************************************************************************** + * Functions to handle the engine + **/ +static int rsaref_destroy(ENGINE *e); +static int rsaref_init(ENGINE *e); +static int rsaref_finish(ENGINE *e); +#if 0 +static int rsaref_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) ()); +#endif + +/***************************************************************************** + * Engine commands + **/ +static const ENGINE_CMD_DEFN rsaref_cmd_defns[] = { + {0, NULL, NULL, 0} +}; + +/***************************************************************************** + * RSA functions + **/ +static int rsaref_private_decrypt(int len, const unsigned char *from, + unsigned char *to, RSA *rsa, int padding); +static int rsaref_private_encrypt(int len, const unsigned char *from, + unsigned char *to, RSA *rsa, int padding); +static int rsaref_public_encrypt(int len, const unsigned char *from, + unsigned char *to, RSA *rsa, int padding); +static int rsaref_public_decrypt(int len, const unsigned char *from, + unsigned char *to, RSA *rsa, int padding); +static int bnref_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, + const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); +static int rsaref_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa); + +/***************************************************************************** + * Our RSA method + **/ +static RSA_METHOD rsaref_rsa = { + "RSAref PKCS#1 RSA", + rsaref_public_encrypt, + rsaref_public_decrypt, + rsaref_private_encrypt, + rsaref_private_decrypt, + rsaref_mod_exp, + bnref_mod_exp, + NULL, + NULL, + 0, + NULL, + NULL, + NULL +}; + +/***************************************************************************** + * Symetric cipher and digest function registrars + **/ +static int rsaref_ciphers(ENGINE *e, const EVP_CIPHER **cipher, + const int **nids, int nid); +static int rsaref_digests(ENGINE *e, const EVP_MD **digest, + const int **nids, int nid); + +static int rsaref_cipher_nids[] = + { NID_des_cbc, NID_des_ede3_cbc, NID_desx_cbc, 0 }; +static int rsaref_digest_nids[] = { NID_md2, NID_md5, 0 }; + +/***************************************************************************** + * DES functions + **/ +static int cipher_des_cbc_init(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc); +static int cipher_des_cbc_code(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, unsigned int inl); +static int cipher_des_cbc_clean(EVP_CIPHER_CTX *); +static int cipher_des_ede3_cbc_init(EVP_CIPHER_CTX *ctx, + const unsigned char *key, + const unsigned char *iv, int enc); +static int cipher_des_ede3_cbc_code(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, + unsigned int inl); +static int cipher_des_ede3_cbc_clean(EVP_CIPHER_CTX *); +static int cipher_desx_cbc_init(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc); +static int cipher_desx_cbc_code(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, unsigned int inl); +static int cipher_desx_cbc_clean(EVP_CIPHER_CTX *); + +/***************************************************************************** + * Our DES ciphers + **/ +static const EVP_CIPHER cipher_des_cbc = { + NID_des_cbc, + 8, 8, 8, + 0 | EVP_CIPH_CBC_MODE, + cipher_des_cbc_init, + cipher_des_cbc_code, + cipher_des_cbc_clean, + sizeof(DES_CBC_CTX), + NULL, + NULL, + NULL, + NULL +}; + +static const EVP_CIPHER cipher_des_ede3_cbc = { + NID_des_ede3_cbc, + 8, 24, 8, + 0 | EVP_CIPH_CBC_MODE, + cipher_des_ede3_cbc_init, + cipher_des_ede3_cbc_code, + cipher_des_ede3_cbc_clean, + sizeof(DES3_CBC_CTX), + NULL, + NULL, + NULL, + NULL +}; + +static const EVP_CIPHER cipher_desx_cbc = { + NID_desx_cbc, + 8, 24, 8, + 0 | EVP_CIPH_CBC_MODE, + cipher_desx_cbc_init, + cipher_desx_cbc_code, + cipher_desx_cbc_clean, + sizeof(DESX_CBC_CTX), + NULL, + NULL, + NULL, + NULL +}; + +/***************************************************************************** + * MD functions + **/ +static int digest_md2_init(EVP_MD_CTX *ctx); +static int digest_md2_update(EVP_MD_CTX *ctx, const void *data, + unsigned long count); +static int digest_md2_final(EVP_MD_CTX *ctx, unsigned char *md); +static int digest_md5_init(EVP_MD_CTX *ctx); +static int digest_md5_update(EVP_MD_CTX *ctx, const void *data, + unsigned long count); +static int digest_md5_final(EVP_MD_CTX *ctx, unsigned char *md); + +/***************************************************************************** + * Our MD digests + **/ +static const EVP_MD digest_md2 = { + NID_md2, + NID_md2WithRSAEncryption, + 16, + 0, + digest_md2_init, + digest_md2_update, + digest_md2_final, + NULL, + NULL, + EVP_PKEY_RSA_method, + 16, + sizeof(MD2_CTX) +}; + +static const EVP_MD digest_md5 = { + NID_md5, + NID_md5WithRSAEncryption, + 16, + 0, + digest_md5_init, + digest_md5_update, + digest_md5_final, + NULL, + NULL, + EVP_PKEY_RSA_method, + 64, + sizeof(MD5_CTX) +}; + +/***************************************************************************** + *** Function definitions *** + *****************************************************************************/ + +/***************************************************************************** + * Functions to handle the engine + **/ + +static int bind_rsaref(ENGINE *e) +{ + const RSA_METHOD *meth1; + if (!ENGINE_set_id(e, engine_rsaref_id) + || !ENGINE_set_name(e, engine_rsaref_name) + || !ENGINE_set_RSA(e, &rsaref_rsa) + || !ENGINE_set_ciphers(e, rsaref_ciphers) + || !ENGINE_set_digests(e, rsaref_digests) + || !ENGINE_set_destroy_function(e, rsaref_destroy) + || !ENGINE_set_init_function(e, rsaref_init) + || !ENGINE_set_finish_function(e, rsaref_finish) + /* || !ENGINE_set_ctrl_function(e, rsaref_ctrl) */ + /* + * || !ENGINE_set_cmd_defns(e, rsaref_cmd_defns) + */ ) + return 0; + + /* Ensure the rsaref error handling is set up */ + ERR_load_RSAREF_strings(); + return 1; +} + +#ifdef ENGINE_DYNAMIC_SUPPORT +static int bind_helper(ENGINE *e, const char *id) +{ + if (id && (strcmp(id, engine_rsaref_id) != 0)) + return 0; + if (!bind_rsaref(e)) + return 0; + return 1; +} + +IMPLEMENT_DYNAMIC_CHECK_FN() + IMPLEMENT_DYNAMIC_BIND_FN(bind_helper) +#else +static ENGINE *engine_rsaref(void) +{ + ENGINE *ret = ENGINE_new(); + if (!ret) + return NULL; + if (!bind_rsaref(ret)) { + ENGINE_free(ret); + return NULL; + } + return ret; +} + +void ENGINE_load_rsaref(void) +{ + /* Copied from eng_[openssl|dyn].c */ + ENGINE *toadd = engine_rsaref(); + if (!toadd) + return; + ENGINE_add(toadd); + ENGINE_free(toadd); + ERR_clear_error(); +} +#endif + +/* Initiator which is only present to make sure this engine looks available */ +static int rsaref_init(ENGINE *e) +{ + return 1; +} + +/* Finisher which is only present to make sure this engine looks available */ +static int rsaref_finish(ENGINE *e) +{ + return 1; +} + +/* Destructor (complements the "ENGINE_ncipher()" constructor) */ +static int rsaref_destroy(ENGINE *e) +{ + ERR_unload_RSAREF_strings(); + return 1; +} + +/***************************************************************************** + * RSA functions + **/ + +static int rsaref_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa) +{ + RSAREFerr(RSAREF_F_RSAREF_MOD_EXP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return (0); +} + +static int bnref_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, + const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx) +{ + RSAREFerr(RSAREF_F_BNREF_MOD_EXP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return (0); +} + +/* unsigned char *to: [max] */ +static int RSAref_bn2bin(BIGNUM *from, unsigned char *to, int max) +{ + int i; + + i = BN_num_bytes(from); + if (i > max) { + RSAREFerr(RSAREF_F_RSAREF_BN2BIN, RSAREF_R_LEN); + return (0); + } + + memset(to, 0, (unsigned int)max); + if (!BN_bn2bin(from, &(to[max - i]))) + return (0); + return (1); +} + +#ifdef undef +/* unsigned char *from: [max] */ +static BIGNUM *RSAref_bin2bn(unsigned char *from, BIGNUM *to, int max) +{ + int i; + BIGNUM *ret; + + for (i = 0; i < max; i++) + if (from[i]) + break; + + ret = BN_bin2bn(&(from[i]), max - i, to); + return (ret); +} + +static int RSAref_Public_ref2eay(RSArefPublicKey * from, RSA *to) +{ + to->n = RSAref_bin2bn(from->m, NULL, RSAref_MAX_LEN); + to->e = RSAref_bin2bn(from->e, NULL, RSAref_MAX_LEN); + if ((to->n == NULL) || (to->e == NULL)) + return (0); + return (1); +} +#endif + +static int RSAref_Public_eay2ref(RSA *from, R_RSA_PUBLIC_KEY * to) +{ + to->bits = BN_num_bits(from->n); + if (!RSAref_bn2bin(from->n, to->modulus, MAX_RSA_MODULUS_LEN)) + return (0); + if (!RSAref_bn2bin(from->e, to->exponent, MAX_RSA_MODULUS_LEN)) + return (0); + return (1); +} + +#ifdef undef +static int RSAref_Private_ref2eay(RSArefPrivateKey * from, RSA *to) +{ + if ((to->n = RSAref_bin2bn(from->m, NULL, RSAref_MAX_LEN)) == NULL) + return (0); + if ((to->e = RSAref_bin2bn(from->e, NULL, RSAref_MAX_LEN)) == NULL) + return (0); + if ((to->d = RSAref_bin2bn(from->d, NULL, RSAref_MAX_LEN)) == NULL) + return (0); + if ((to->p = + RSAref_bin2bn(from->prime[0], NULL, RSAref_MAX_PLEN)) == NULL) + return (0); + if ((to->q = + RSAref_bin2bn(from->prime[1], NULL, RSAref_MAX_PLEN)) == NULL) + return (0); + if ((to->dmp1 = RSAref_bin2bn(from->pexp[0], NULL, RSAref_MAX_PLEN)) + == NULL) + return (0); + if ((to->dmq1 = RSAref_bin2bn(from->pexp[1], NULL, RSAref_MAX_PLEN)) + == NULL) + return (0); + if ((to->iqmp = RSAref_bin2bn(from->coef, NULL, RSAref_MAX_PLEN)) == NULL) + return (0); + return (1); +} +#endif + +static int RSAref_Private_eay2ref(RSA *from, R_RSA_PRIVATE_KEY * to) +{ + to->bits = BN_num_bits(from->n); + if (!RSAref_bn2bin(from->n, to->modulus, MAX_RSA_MODULUS_LEN)) + return (0); + if (!RSAref_bn2bin(from->e, to->publicExponent, MAX_RSA_MODULUS_LEN)) + return (0); + if (!RSAref_bn2bin(from->d, to->exponent, MAX_RSA_MODULUS_LEN)) + return (0); + if (!RSAref_bn2bin(from->p, to->prime[0], MAX_RSA_PRIME_LEN)) + return (0); + if (!RSAref_bn2bin(from->q, to->prime[1], MAX_RSA_PRIME_LEN)) + return (0); + if (!RSAref_bn2bin(from->dmp1, to->primeExponent[0], MAX_RSA_PRIME_LEN)) + return (0); + if (!RSAref_bn2bin(from->dmq1, to->primeExponent[1], MAX_RSA_PRIME_LEN)) + return (0); + if (!RSAref_bn2bin(from->iqmp, to->coefficient, MAX_RSA_PRIME_LEN)) + return (0); + return (1); +} + +static int rsaref_private_decrypt(int len, const unsigned char *from, + unsigned char *to, RSA *rsa, int padding) +{ + int i, outlen = -1; + R_RSA_PRIVATE_KEY RSAkey; + + if (!RSAref_Private_eay2ref(rsa, &RSAkey)) + goto err; + if ((i = + RSAPrivateDecrypt(to, (unsigned int *)&outlen, (unsigned char *)from, + len, &RSAkey)) != 0) { + RSAREFerr(RSAREF_F_RSAREF_PRIVATE_DECRYPT, i); + outlen = -1; + } + err: + memset(&RSAkey, 0, sizeof(RSAkey)); + return (outlen); +} + +static int rsaref_private_encrypt(int len, const unsigned char *from, + unsigned char *to, RSA *rsa, int padding) +{ + int i, outlen = -1; + R_RSA_PRIVATE_KEY RSAkey; + + if (padding != RSA_PKCS1_PADDING) { + RSAREFerr(RSAREF_F_RSAREF_PRIVATE_ENCRYPT, + RSA_R_UNKNOWN_PADDING_TYPE); + goto err; + } + if (!RSAref_Private_eay2ref(rsa, &RSAkey)) + goto err; + if ((i = + RSAPrivateEncrypt(to, (unsigned int *)&outlen, (unsigned char *)from, + len, &RSAkey)) != 0) { + RSAREFerr(RSAREF_F_RSAREF_PRIVATE_ENCRYPT, i); + outlen = -1; + } + err: + memset(&RSAkey, 0, sizeof(RSAkey)); + return (outlen); +} + +static int rsaref_public_decrypt(int len, const unsigned char *from, + unsigned char *to, RSA *rsa, int padding) +{ + int i, outlen = -1; + R_RSA_PUBLIC_KEY RSAkey; + + if (!RSAref_Public_eay2ref(rsa, &RSAkey)) + goto err; + if ((i = + RSAPublicDecrypt(to, (unsigned int *)&outlen, (unsigned char *)from, + len, &RSAkey)) != 0) { + RSAREFerr(RSAREF_F_RSAREF_PUBLIC_DECRYPT, i); + outlen = -1; + } + err: + memset(&RSAkey, 0, sizeof(RSAkey)); + return (outlen); +} + +static int rsaref_public_encrypt(int len, const unsigned char *from, + unsigned char *to, RSA *rsa, int padding) +{ + int outlen = -1; + int i; + R_RSA_PUBLIC_KEY RSAkey; + R_RANDOM_STRUCT rnd; + unsigned char buf[16]; + + if (padding != RSA_PKCS1_PADDING && padding != RSA_SSLV23_PADDING) { + RSAREFerr(RSAREF_F_RSAREF_PUBLIC_ENCRYPT, RSA_R_UNKNOWN_PADDING_TYPE); + goto err; + } + + R_RandomInit(&rnd); + R_GetRandomBytesNeeded((unsigned int *)&i, &rnd); + while (i > 0) { + if (RAND_bytes(buf, 16) <= 0) + goto err; + R_RandomUpdate(&rnd, buf, (unsigned int)((i > 16) ? 16 : i)); + i -= 16; + } + + if (!RSAref_Public_eay2ref(rsa, &RSAkey)) + goto err; + if ((i = + RSAPublicEncrypt(to, (unsigned int *)&outlen, (unsigned char *)from, + len, &RSAkey, &rnd)) != 0) { + RSAREFerr(RSAREF_F_RSAREF_PUBLIC_ENCRYPT, i); + outlen = -1; + goto err; + } + err: + memset(&RSAkey, 0, sizeof(RSAkey)); + R_RandomFinal(&rnd); + memset(&rnd, 0, sizeof(rnd)); + return (outlen); +} + +/***************************************************************************** + * Symetric cipher and digest function registrars + **/ +static int rsaref_ciphers(ENGINE *e, const EVP_CIPHER **cipher, + const int **nids, int nid) +{ + int ok = 1; + if (!cipher) { + /* We are returning a list of supported nids */ + *nids = rsaref_cipher_nids; + return (sizeof(rsaref_cipher_nids) - + 1) / sizeof(rsaref_cipher_nids[0]); + } + /* We are being asked for a specific cipher */ + switch (nid) { + case NID_des_cbc: + *cipher = &cipher_des_cbc; + break; + case NID_des_ede3_cbc: + *cipher = &cipher_des_ede3_cbc; + break; + case NID_desx_cbc: + *cipher = &cipher_desx_cbc; + break; + default: + ok = 0; + *cipher = NULL; + break; + } + return ok; +} + +static int rsaref_digests(ENGINE *e, const EVP_MD **digest, + const int **nids, int nid) +{ + int ok = 1; + if (!digest) { + /* We are returning a list of supported nids */ + *nids = rsaref_digest_nids; + return (sizeof(rsaref_digest_nids) - + 1) / sizeof(rsaref_digest_nids[0]); + } + /* We are being asked for a specific digest */ + switch (nid) { + case NID_md2: + *digest = &digest_md2; + break; + case NID_md5: + *digest = &digest_md5; + break; + default: + ok = 0; + *digest = NULL; + break; + } + return ok; +} + +/***************************************************************************** + * DES functions + **/ +#undef data +#define data(ctx) ((DES_CBC_CTX *)(ctx)->cipher_data) +static int cipher_des_cbc_init(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc) +{ + DES_CBCInit(data(ctx), (unsigned char *)key, (unsigned char *)iv, enc); + return 1; +} + +static int cipher_des_cbc_code(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, unsigned int inl) +{ + int ret = DES_CBCUpdate(data(ctx), out, (unsigned char *)in, inl); + switch (ret) { + case RE_LEN: + RSAREFerr(RSAREF_F_CIPHER_DES_CBC_CODE, + RSAREF_R_LENGTH_NOT_BLOCK_ALIGNED); + break; + case 0: + break; + default: + RSAREFerr(RSAREF_F_CIPHER_DES_CBC_CODE, RSAREF_R_UNKNOWN_FAULT); + } + return !ret; +} + +static int cipher_des_cbc_clean(EVP_CIPHER_CTX *ctx) +{ + memset(data(ctx), 0, ctx->cipher->ctx_size); + return 1; +} + +#undef data +#define data(ctx) ((DES3_CBC_CTX *)(ctx)->cipher_data) +static int cipher_des_ede3_cbc_init(EVP_CIPHER_CTX *ctx, + const unsigned char *key, + const unsigned char *iv, int enc) +{ + DES3_CBCInit(data(ctx), (unsigned char *)key, (unsigned char *)iv, enc); + return 1; +} + +static int cipher_des_ede3_cbc_code(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, unsigned int inl) +{ + int ret = DES3_CBCUpdate(data(ctx), out, (unsigned char *)in, inl); + switch (ret) { + case RE_LEN: + RSAREFerr(RSAREF_F_CIPHER_DES_CBC_CODE, + RSAREF_R_LENGTH_NOT_BLOCK_ALIGNED); + break; + case 0: + break; + default: + RSAREFerr(RSAREF_F_CIPHER_DES_CBC_CODE, RSAREF_R_UNKNOWN_FAULT); + } + return !ret; +} + +static int cipher_des_ede3_cbc_clean(EVP_CIPHER_CTX *ctx) +{ + memset(data(ctx), 0, ctx->cipher->ctx_size); + return 1; +} + +#undef data +#define data(ctx) ((DESX_CBC_CTX *)(ctx)->cipher_data) +static int cipher_desx_cbc_init(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc) +{ + DESX_CBCInit(data(ctx), (unsigned char *)key, (unsigned char *)iv, enc); + return 1; +} + +static int cipher_desx_cbc_code(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, unsigned int inl) +{ + int ret = DESX_CBCUpdate(data(ctx), out, (unsigned char *)in, inl); + switch (ret) { + case RE_LEN: + RSAREFerr(RSAREF_F_CIPHER_DES_CBC_CODE, + RSAREF_R_LENGTH_NOT_BLOCK_ALIGNED); + break; + case 0: + break; + default: + RSAREFerr(RSAREF_F_CIPHER_DES_CBC_CODE, RSAREF_R_UNKNOWN_FAULT); + } + return !ret; +} + +static int cipher_desx_cbc_clean(EVP_CIPHER_CTX *ctx) +{ + memset(data(ctx), 0, ctx->cipher->ctx_size); + return 1; +} + +/***************************************************************************** + * MD functions + **/ +#undef data +#define data(ctx) ((MD2_CTX *)(ctx)->md_data) +static int digest_md2_init(EVP_MD_CTX *ctx) +{ + MD2Init(data(ctx)); + return 1; +} + +static int digest_md2_update(EVP_MD_CTX *ctx, const void *data, + unsigned long count) +{ + MD2Update(data(ctx), (unsigned char *)data, (unsigned int)count); + return 1; +} + +static int digest_md2_final(EVP_MD_CTX *ctx, unsigned char *md) +{ + MD2Final(md, data(ctx)); + return 1; +} + +#undef data +#define data(ctx) ((MD5_CTX *)(ctx)->md_data) +static int digest_md5_init(EVP_MD_CTX *ctx) +{ + MD5Init(data(ctx)); + return 1; +} + +static int digest_md5_update(EVP_MD_CTX *ctx, const void *data, + unsigned long count) +{ + MD5Update(data(ctx), (unsigned char *)data, (unsigned int)count); + return 1; +} + +static int digest_md5_final(EVP_MD_CTX *ctx, unsigned char *md) +{ + MD5Final(md, data(ctx)); + return 1; +} |