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This change adds dummy RC4 and SHA1 support to the "openssl" ENGINE for

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testing. Because of the recent changes (see crypto/engine/README), the
"openssl" ENGINE is no longer needed nor is it loaded automatically or by
ENGINE_load_builtin_engines(). So a explicit ENGINE_load_openssl() call is
required by applications or a modification to eng_all.c before this ENGINE
will be used. This change will send output to stderr as/when its
implementations are used.
This commit is contained in:
Geoff Thorpe 2001-09-25 21:41:20 +00:00
parent 11a57c7be5
commit 3b04cdd706
1 changed files with 224 additions and 9 deletions
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233
crypto/engine/eng_openssl.c
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@ -63,32 +63,247 @@
#include <openssl/engine.h>
#include <openssl/dso.h>
/* This testing gunk is implemented (and explained) lower down. It also assumes
* the application explicitly calls "ENGINE_load_openssl()" because this is no
* longer automatic in ENGINE_load_builtin_engines(). */
#define TEST_ENG_OPENSSL_RC4
/* #define TEST_ENC_OPENSSL_RC4_FALLBACK */
/* #define TEST_ENG_OPENSSL_RC4_OTHERS */
#define TEST_ENG_OPENSSL_RC4_P_INIT
/* #define TEST_ENG_OPENSSL_RC4_P_CIPHER */
#define TEST_ENG_OPENSSL_SHA
/* #define TEST_ENG_OPENSSL_SHA_FALLBACK */
/* #define TEST_ENG_OPENSSL_SHA_OTHERS */
/* #define TEST_ENG_OPENSSL_SHA_P_INIT */
/* #define TEST_ENG_OPENSSL_SHA_P_UPDATE */
/* #define TEST_ENG_OPENSSL_SHA_P_FINAL */
#ifdef TEST_ENG_OPENSSL_RC4
static int openssl_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
const int **nids, int nid);
#endif
#ifdef TEST_ENG_OPENSSL_SHA
static int openssl_digests(ENGINE *e, const EVP_MD **digest,
const int **nids, int nid);
#endif
/* The constants used when creating the ENGINE */
static const char *engine_openssl_id = "openssl";
static const char *engine_openssl_name = "Software engine support";
/* As this is only ever called once, there's no need for locking
* (indeed - the lock will already be held by our caller!!!) */
ENGINE *ENGINE_openssl(void)
static ENGINE *engine_openssl(void)
{
ENGINE *ret = ENGINE_new();
if(!ret)
return NULL;
if(!ENGINE_set_id(ret, engine_openssl_id) ||
!ENGINE_set_name(ret, engine_openssl_name) ||
if(!ENGINE_set_id(ret, engine_openssl_id)
|| !ENGINE_set_name(ret, engine_openssl_name)
#ifndef OPENSSL_NO_RSA
!ENGINE_set_RSA(ret, RSA_get_default_method()) ||
|| !ENGINE_set_RSA(ret, RSA_get_default_method())
#endif
#ifndef OPENSSL_NO_DSA
!ENGINE_set_DSA(ret, DSA_get_default_method()) ||
|| !ENGINE_set_DSA(ret, DSA_get_default_method())
#endif
#ifndef OPENSSL_NO_DH
!ENGINE_set_DH(ret, DH_get_default_method()) ||
|| !ENGINE_set_DH(ret, DH_get_default_method())
#endif
!ENGINE_set_RAND(ret, RAND_SSLeay()))
|| !ENGINE_set_RAND(ret, RAND_SSLeay())
#ifdef TEST_ENG_OPENSSL_RC4
|| !ENGINE_set_ciphers(ret, openssl_ciphers)
#endif
#ifdef TEST_ENG_OPENSSL_SHA
|| !ENGINE_set_digests(ret, openssl_digests)
#endif
)
{
ENGINE_free(ret);
return NULL;
}
return ret;
}
void ENGINE_load_openssl(void)
{
ENGINE *toadd = engine_openssl();
if(!toadd) return;
ENGINE_add(toadd);
/* If the "add" worked, it gets a structural reference. So either way,
* we release our just-created reference. */
ENGINE_free(toadd);
ERR_clear_error();
}
#ifdef TEST_ENG_OPENSSL_RC4
/* This section of code compiles an "alternative implementation" of two modes of
* RC4 into this ENGINE. The result is that EVP_CIPHER operation for "rc4"
* should under normal circumstances go via this support rather than the default
* EVP support. There are other symbols to tweak the testing;
* TEST_ENC_OPENSSL_RC4_FALLBACK - declare support for "-1" so that all
* uncached cipher lookups check with this ENGINE (ie. it'll get asked
* about other ciphers, but hopefully not more than once for each nid).
* TEST_ENC_OPENSSL_RC4_OTHERS - print a one line message to stderr each time
* we're asked for a cipher we don't support (should only happen in
* combination with the "FALLBACK" case).
* TEST_ENG_OPENSSL_RC4_P_INIT - print a one line message to stderr each time
* the "init_key" handler is called.
* TEST_ENG_OPENSSL_RC4_P_CIPHER - ditto for the "cipher" handler.
*/
#include <openssl/evp.h>
#include <openssl/rc4.h>
#define TEST_RC4_KEY_SIZE 16
#ifdef TEST_ENC_OPENSSL_RC4_FALLBACK
static int test_cipher_nids[] = {-1};
static int test_cipher_nids_number = 1;
#else
static int test_cipher_nids[] = {NID_rc4,NID_rc4_40};
static int test_cipher_nids_number = 2;
#endif
typedef struct {
unsigned char key[TEST_RC4_KEY_SIZE];
RC4_KEY ks;
} TEST_RC4_KEY;
#define test(ctx) ((TEST_RC4_KEY *)(ctx)->cipher_data)
static int test_rc4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
const unsigned char *iv, int enc)
{
#ifdef TEST_ENG_OPENSSL_RC4_P_INIT
fprintf(stderr, "(TEST_ENG_OPENSSL_RC4) test_init_key() called\n");
#endif
memcpy(&test(ctx)->key[0],key,EVP_CIPHER_CTX_key_length(ctx));
RC4_set_key(&test(ctx)->ks,EVP_CIPHER_CTX_key_length(ctx),
test(ctx)->key);
return 1;
}
static int test_rc4_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, unsigned int inl)
{
#ifdef TEST_ENG_OPENSSL_RC4_P_CIPHER
fprintf(stderr, "(TEST_ENG_OPENSSL_RC4) test_cipher() called\n");
#endif
RC4(&test(ctx)->ks,inl,in,out);
return 1;
}
static const EVP_CIPHER test_r4_cipher=
{
NID_rc4,
1,TEST_RC4_KEY_SIZE,0,
EVP_CIPH_VARIABLE_LENGTH,
test_rc4_init_key,
test_rc4_cipher,
NULL,
sizeof(TEST_RC4_KEY),
NULL,
NULL,
NULL
};
static const EVP_CIPHER test_r4_40_cipher=
{
NID_rc4_40,
1,5 /* 40 bit */,0,
EVP_CIPH_VARIABLE_LENGTH,
test_rc4_init_key,
test_rc4_cipher,
NULL,
sizeof(TEST_RC4_KEY),
NULL,
NULL,
NULL
};
static int openssl_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
const int **nids, int nid)
{
if(!cipher)
{
/* We are returning a list of supported nids */
*nids = test_cipher_nids;
return test_cipher_nids_number;
}
/* We are being asked for a specific cipher */
if(nid == NID_rc4)
*cipher = &test_r4_cipher;
else if(nid == NID_rc4_40)
*cipher = &test_r4_40_cipher;
else
{
#ifdef TEST_ENG_OPENSSL_RC4_OTHERS
fprintf(stderr, "(TEST_ENG_OPENSSL_RC4) returning NULL for "
"nid %d\n", nid);
#endif
*cipher = NULL;
return 0;
}
return 1;
}
#endif
#ifdef TEST_ENG_OPENSSL_SHA
/* Much the same sort of comment as for TEST_ENG_OPENSSL_RC4 */
#include <openssl/evp.h>
#include <openssl/sha.h>
#ifdef TEST_ENC_OPENSSL_SHA_FALLBACK
static int test_digest_nids[] = {-1};
static int test_digest_nids_number = 1;
#else
static int test_digest_nids[] = {NID_sha1};
static int test_digest_nids_number = 1;
#endif
static int test_sha1_init(EVP_MD_CTX *ctx)
{
#ifdef TEST_ENG_OPENSSL_SHA_P_INIT
fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) test_sha1_init() called\n");
#endif
return SHA1_Init(ctx->md_data);
}
static int test_sha1_update(EVP_MD_CTX *ctx,const void *data,unsigned long count)
{
#ifdef TEST_ENG_OPENSSL_SHA_P_UPDATE
fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) test_sha1_update() called\n");
#endif
return SHA1_Update(ctx->md_data,data,count);
}
static int test_sha1_final(EVP_MD_CTX *ctx,unsigned char *md)
{
#ifdef TEST_ENG_OPENSSL_SHA_P_FINAL
fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) test_sha1_final() called\n");
#endif
return SHA1_Final(md,ctx->md_data);
}
static const EVP_MD test_sha_md=
{
NID_sha1,
NID_sha1WithRSAEncryption,
SHA_DIGEST_LENGTH,
0,
test_sha1_init,
test_sha1_update,
test_sha1_final,
NULL,
NULL,
EVP_PKEY_RSA_method,
SHA_CBLOCK,
sizeof(EVP_MD *)+sizeof(SHA_CTX),
};
static int openssl_digests(ENGINE *e, const EVP_MD **digest,
const int **nids, int nid)
{
if(!digest)
{
/* We are returning a list of supported nids */
*nids = test_digest_nids;
return test_digest_nids_number;
}
/* We are being asked for a specific digest */
if(nid == NID_sha1)
*digest = &test_sha_md;
else
{
#ifdef TEST_ENG_OPENSSL_SHA_OTHERS
fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) returning NULL for "
"nid %d\n", nid);
#endif
*digest = NULL;
return 0;
}
return 1;
}
#endif