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cyrus-sasl
cyrus-sasl-make-digestmd5-work-ssl3.patch
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File cyrus-sasl-make-digestmd5-work-ssl3.patch of Package cyrus-sasl
Index: cyrus-sasl-2.1.28/plugins/digestmd5.c =================================================================== --- cyrus-sasl-2.1.28.orig/plugins/digestmd5.c +++ cyrus-sasl-2.1.28/plugins/digestmd5.c @@ -80,6 +80,12 @@ # endif #endif /* WITH_DES */ +/* legacy provider with openssl 3.0 */ +#if OPENSSL_VERSION_NUMBER >= 0x30000000L +# include <openssl/provider.h> +# include <openssl/crypto.h> +#endif + #ifdef WIN32 # include <winsock2.h> #else /* Unix */ @@ -170,6 +176,12 @@ enum Context_type { SERVER = 0, CLIENT = typedef struct cipher_context cipher_context_t; +typedef struct crypto_context { + void *libctx; + cipher_context_t *enc_ctx; + cipher_context_t *dec_ctx; +} crypto_context_t; + /* cached auth info used for fast reauth */ typedef struct reauth_entry { char *authid; @@ -254,12 +266,12 @@ typedef struct context { decode_context_t decode_context; /* if privacy mode is used use these functions for encode and decode */ + char *cipher_name; cipher_function_t *cipher_enc; cipher_function_t *cipher_dec; cipher_init_t *cipher_init; cipher_free_t *cipher_free; - struct cipher_context *cipher_enc_context; - struct cipher_context *cipher_dec_context; + crypto_context_t crypto; } context_t; struct digest_cipher { @@ -888,7 +900,7 @@ static int dec_3des(context_t *text, char *output, unsigned *outputlen) { - des_context_t *c = (des_context_t *) text->cipher_dec_context; + des_context_t *c = (des_context_t *) text->crypto.dec_ctx; int padding, p; des_ede2_cbc_encrypt((void *) input, @@ -925,7 +937,7 @@ static int enc_3des(context_t *text, char *output, unsigned *outputlen) { - des_context_t *c = (des_context_t *) text->cipher_enc_context; + des_context_t *c = (des_context_t *) text->crypto.enc_ctx; int len; int paddinglen; @@ -973,7 +985,7 @@ static int init_3des(context_t *text, return SASL_FAIL; memcpy(c->ivec, ((char *) enckey) + 8, 8); - text->cipher_enc_context = (cipher_context_t *) c; + text->crypto.enc_ctx = (cipher_context_t *) c; /* setup dec context */ c++; @@ -987,7 +999,7 @@ static int init_3des(context_t *text, memcpy(c->ivec, ((char *) deckey) + 8, 8); - text->cipher_dec_context = (cipher_context_t *) c; + text->crypto.dec_ctx = (cipher_context_t *) c; return SASL_OK; } @@ -1006,7 +1018,7 @@ static int dec_des(context_t *text, char *output, unsigned *outputlen) { - des_context_t *c = (des_context_t *) text->cipher_dec_context; + des_context_t *c = (des_context_t *) text->crypto.dec_ctx; int p, padding = 0; des_cbc_encrypt((void *) input, @@ -1046,7 +1058,7 @@ static int enc_des(context_t *text, char *output, unsigned *outputlen) { - des_context_t *c = (des_context_t *) text->cipher_enc_context; + des_context_t *c = (des_context_t *) text->crypto.enc_ctx; int len; int paddinglen; @@ -1093,7 +1105,7 @@ static int init_des(context_t *text, memcpy(c->ivec, ((char *) enckey) + 8, 8); - text->cipher_enc_context = (cipher_context_t *) c; + text->crypto.enc_ctx = (cipher_context_t *) c; /* setup dec context */ c++; @@ -1102,60 +1114,139 @@ static int init_des(context_t *text, memcpy(c->ivec, ((char *) deckey) + 8, 8); - text->cipher_dec_context = (cipher_context_t *) c; + text->crypto.dec_ctx = (cipher_context_t *) c; return SASL_OK; } static void free_des(context_t *text) { - /* free des contextss. only cipher_enc_context needs to be free'd, - since cipher_dec_context was allocated at the same time. */ - if (text->cipher_enc_context) text->utils->free(text->cipher_enc_context); + /* free des contextss. only enc_ctx needs to be free'd, + since dec_cxt was allocated at the same time. */ + if (text->crypto.enc_ctx) { + text->utils->free(text->crypto.enc_ctx); + } } #endif /* WITH_DES */ #ifdef WITH_RC4 -#ifdef HAVE_OPENSSL #include <openssl/evp.h> +#if OPENSSL_VERSION_NUMBER >= 0x30000000L +typedef struct ossl3_library_context { + OSSL_LIB_CTX *libctx; + OSSL_PROVIDER *legacy_provider; + OSSL_PROVIDER *default_provider; +} ossl3_context_t; + +static int init_ossl3_ctx(context_t *text) +{ + ossl3_context_t *ctx = text->utils->malloc(sizeof(ossl3_context_t)); + if (!ctx) return SASL_NOMEM; + + ctx->libctx = OSSL_LIB_CTX_new(); + if (!ctx->libctx) { + text->utils->free(ctx); + return SASL_FAIL; + } + + /* Load both legacy and default provider as both may be needed */ + /* if they fail keep going and an error will be raised when we try to + * fetch the cipher later */ + ctx->legacy_provider = OSSL_PROVIDER_load(ctx->libctx, "legacy"); + ctx->default_provider = OSSL_PROVIDER_load(ctx->libctx, "default"); + text->crypto.libctx = (void *)ctx; + + return SASL_OK; +} + +static void free_ossl3_ctx(context_t *text) +{ + ossl3_context_t *ctx; + + if (!text->crypto.libctx) return; + + ctx = (ossl3_context_t *)text->crypto.libctx; + + if (ctx->legacy_provider) OSSL_PROVIDER_unload(ctx->legacy_provider); + if (ctx->default_provider) OSSL_PROVIDER_unload(ctx->default_provider); + if (ctx->libctx) OSSL_LIB_CTX_free(ctx->libctx); + + text->utils->free(ctx); + text->crypto.libctx = NULL; +} +#endif + static void free_rc4(context_t *text) { - if (text->cipher_enc_context) { - EVP_CIPHER_CTX_free((EVP_CIPHER_CTX *)text->cipher_enc_context); - text->cipher_enc_context = NULL; - } - if (text->cipher_dec_context) { - EVP_CIPHER_CTX_free((EVP_CIPHER_CTX *)text->cipher_dec_context); - text->cipher_dec_context = NULL; + if (text->crypto.enc_ctx) { + EVP_CIPHER_CTX_free((EVP_CIPHER_CTX *)text->crypto.enc_ctx); + text->crypto.enc_ctx = NULL; + } + if (text->crypto.dec_ctx) { + EVP_CIPHER_CTX_free((EVP_CIPHER_CTX *)text->crypto.dec_ctx); + text->crypto.dec_ctx = NULL; } +#if OPENSSL_VERSION_NUMBER >= 0x30000000L + free_ossl3_ctx(text); +#endif } static int init_rc4(context_t *text, unsigned char enckey[16], unsigned char deckey[16]) { + const EVP_CIPHER *cipher; EVP_CIPHER_CTX *ctx; int rc; - ctx = EVP_CIPHER_CTX_new(); - if (ctx == NULL) return SASL_NOMEM; +#if OPENSSL_VERSION_NUMBER >= 0x30000000L + ossl3_context_t *ossl3_ctx; - rc = EVP_EncryptInit_ex(ctx, EVP_rc4(), NULL, enckey, NULL); - if (rc != 1) return SASL_FAIL; + rc = init_ossl3_ctx(text); + if (rc != SASL_OK) return rc; + + ossl3_ctx = (ossl3_context_t *)text->crypto.libctx; + cipher = EVP_CIPHER_fetch(ossl3_ctx->libctx, "RC4", ""); +#else + cipher = EVP_rc4(); +#endif - text->cipher_enc_context = (void *)ctx; ctx = EVP_CIPHER_CTX_new(); - if (ctx == NULL) return SASL_NOMEM; + if (ctx == NULL) { + rc = SASL_NOMEM; + goto done; + } - rc = EVP_DecryptInit_ex(ctx, EVP_rc4(), NULL, deckey, NULL); - if (rc != 1) return SASL_FAIL; + rc = EVP_EncryptInit_ex(ctx, cipher, NULL, enckey, NULL); + if (rc != 1) { + rc = SASL_FAIL; + goto done; + } + text->crypto.enc_ctx = (void *)ctx; + + ctx = EVP_CIPHER_CTX_new(); + if (ctx == NULL) { + rc = SASL_NOMEM; + goto done; + } + + rc = EVP_DecryptInit_ex(ctx, cipher, NULL, deckey, NULL); + if (rc != 1) { + rc = SASL_FAIL; + goto done; + } + text->crypto.dec_ctx = (void *)ctx; - text->cipher_dec_context = (void *)ctx; + rc = SASL_OK; - return SASL_OK; +done: + if (rc != SASL_OK) { + free_rc4(text); + } + return rc; } static int dec_rc4(context_t *text, @@ -1169,14 +1260,14 @@ static int dec_rc4(context_t *text, int rc; /* decrypt the text part & HMAC */ - rc = EVP_DecryptUpdate((EVP_CIPHER_CTX *)text->cipher_dec_context, + rc = EVP_DecryptUpdate((EVP_CIPHER_CTX *)text->crypto.dec_ctx, (unsigned char *)output, &len, (const unsigned char *)input, inputlen); if (rc != 1) return SASL_FAIL; *outputlen = len; - rc = EVP_DecryptFinal_ex((EVP_CIPHER_CTX *)text->cipher_dec_context, + rc = EVP_DecryptFinal_ex((EVP_CIPHER_CTX *)text->crypto.dec_ctx, (unsigned char *)output + len, &len); if (rc != 1) return SASL_FAIL; @@ -1198,7 +1289,7 @@ static int enc_rc4(context_t *text, int len; int rc; /* encrypt the text part */ - rc = EVP_EncryptUpdate((EVP_CIPHER_CTX *)text->cipher_enc_context, + rc = EVP_EncryptUpdate((EVP_CIPHER_CTX *)text->crypto.enc_ctx, (unsigned char *)output, &len, (const unsigned char *)input, inputlen); if (rc != 1) return SASL_FAIL; @@ -1206,14 +1297,14 @@ static int enc_rc4(context_t *text, *outputlen = len; /* encrypt the `MAC part */ - rc = EVP_EncryptUpdate((EVP_CIPHER_CTX *)text->cipher_enc_context, + rc = EVP_EncryptUpdate((EVP_CIPHER_CTX *)text->crypto.enc_ctx, (unsigned char *)output + *outputlen, &len, digest, 10); if (rc != 1) return SASL_FAIL; *outputlen += len; - rc = EVP_EncryptFinal_ex((EVP_CIPHER_CTX *)text->cipher_enc_context, + rc = EVP_EncryptFinal_ex((EVP_CIPHER_CTX *)text->crypto.enc_ctx, (unsigned char *)output + *outputlen, &len); if (rc != 1) return SASL_FAIL; @@ -1221,187 +1312,6 @@ static int enc_rc4(context_t *text, return SASL_OK; } -#else -/* quick generic implementation of RC4 */ -struct rc4_context_s { - unsigned char sbox[256]; - int i, j; -}; - -typedef struct rc4_context_s rc4_context_t; - -static void rc4_init(rc4_context_t *text, - const unsigned char *key, - unsigned keylen) -{ - int i, j; - - /* fill in linearly s0=0 s1=1... */ - for (i=0;i<256;i++) - text->sbox[i]=i; - - j=0; - for (i = 0; i < 256; i++) { - unsigned char tmp; - /* j = (j + Si + Ki) mod 256 */ - j = (j + text->sbox[i] + key[i % keylen]) % 256; - - /* swap Si and Sj */ - tmp = text->sbox[i]; - text->sbox[i] = text->sbox[j]; - text->sbox[j] = tmp; - } - - /* counters initialized to 0 */ - text->i = 0; - text->j = 0; -} - -static void rc4_encrypt(rc4_context_t *text, - const char *input, - char *output, - unsigned len) -{ - int tmp; - int i = text->i; - int j = text->j; - int t; - int K; - const char *input_end = input + len; - - while (input < input_end) { - i = (i + 1) % 256; - - j = (j + text->sbox[i]) % 256; - - /* swap Si and Sj */ - tmp = text->sbox[i]; - text->sbox[i] = text->sbox[j]; - text->sbox[j] = tmp; - - t = (text->sbox[i] + text->sbox[j]) % 256; - - K = text->sbox[t]; - - /* byte K is Xor'ed with plaintext */ - *output++ = *input++ ^ K; - } - - text->i = i; - text->j = j; -} - -static void rc4_decrypt(rc4_context_t *text, - const char *input, - char *output, - unsigned len) -{ - int tmp; - int i = text->i; - int j = text->j; - int t; - int K; - const char *input_end = input + len; - - while (input < input_end) { - i = (i + 1) % 256; - - j = (j + text->sbox[i]) % 256; - - /* swap Si and Sj */ - tmp = text->sbox[i]; - text->sbox[i] = text->sbox[j]; - text->sbox[j] = tmp; - - t = (text->sbox[i] + text->sbox[j]) % 256; - - K = text->sbox[t]; - - /* byte K is Xor'ed with plaintext */ - *output++ = *input++ ^ K; - } - - text->i = i; - text->j = j; -} - -static void free_rc4(context_t *text) -{ - /* free rc4 context structures */ - - if (text->cipher_enc_context) { - text->utils->free(text->cipher_enc_context); - text->cipher_enc_context = NULL; - } - if (text->cipher_dec_context) { - text->utils->free(text->cipher_dec_context); - text->cipher_dec_context = NULL; - } -} - -static int init_rc4(context_t *text, - unsigned char enckey[16], - unsigned char deckey[16]) -{ - /* allocate rc4 context structures */ - text->cipher_enc_context= - (cipher_context_t *) text->utils->malloc(sizeof(rc4_context_t)); - if (text->cipher_enc_context == NULL) return SASL_NOMEM; - - text->cipher_dec_context= - (cipher_context_t *) text->utils->malloc(sizeof(rc4_context_t)); - if (text->cipher_dec_context == NULL) return SASL_NOMEM; - - /* initialize them */ - rc4_init((rc4_context_t *) text->cipher_enc_context, - (const unsigned char *) enckey, 16); - rc4_init((rc4_context_t *) text->cipher_dec_context, - (const unsigned char *) deckey, 16); - - return SASL_OK; -} - -static int dec_rc4(context_t *text, - const char *input, - unsigned inputlen, - unsigned char digest[16] __attribute__((unused)), - char *output, - unsigned *outputlen) -{ - /* decrypt the text part & HMAC */ - rc4_decrypt((rc4_context_t *) text->cipher_dec_context, - input, output, inputlen); - - /* no padding so we just subtract the HMAC to get the text length */ - *outputlen = inputlen - 10; - - return SASL_OK; -} - -static int enc_rc4(context_t *text, - const char *input, - unsigned inputlen, - unsigned char digest[16], - char *output, - unsigned *outputlen) -{ - /* pad is zero */ - *outputlen = inputlen+10; - - /* encrypt the text part */ - rc4_encrypt((rc4_context_t *) text->cipher_enc_context, - input, - output, - inputlen); - - /* encrypt the HMAC part */ - rc4_encrypt((rc4_context_t *) text->cipher_enc_context, - (const char *) digest, - (output)+inputlen, 10); - - return SASL_OK; -} -#endif /* HAVE_OPENSSL */ #endif /* WITH_RC4 */ struct digest_cipher available_ciphers[] = @@ -2821,6 +2731,7 @@ static int digestmd5_server_mech_step2(s } if (cptr->name) { + text->cipher_name = cptr->name; text->cipher_enc = cptr->cipher_enc; text->cipher_dec = cptr->cipher_dec; text->cipher_init = cptr->cipher_init; @@ -2964,7 +2875,10 @@ static int digestmd5_server_mech_step2(s if (text->cipher_init) { if (text->cipher_init(text, enckey, deckey) != SASL_OK) { sparams->utils->seterror(sparams->utils->conn, 0, - "couldn't init cipher"); + "couldn't init cipher '%s'", + text->cipher_name); + result = SASL_FAIL; + goto FreeAllMem; } } } @@ -3515,6 +3429,7 @@ static int make_client_response(context_ oparams->mech_ssf = ctext->cipher->ssf; nbits = ctext->cipher->n; + text->cipher_name = ctext->cipher->name; text->cipher_enc = ctext->cipher->cipher_enc; text->cipher_dec = ctext->cipher->cipher_dec; text->cipher_free = ctext->cipher->cipher_free; @@ -3739,7 +3654,13 @@ static int make_client_response(context_ /* initialize cipher if need be */ if (text->cipher_init) { - text->cipher_init(text, enckey, deckey); + if (text->cipher_init(text, enckey, deckey) != SASL_OK) { + params->utils->seterror(params->utils->conn, 0, + "internal error: failed to init cipher '%s'", + text->cipher_name); + result = SASL_FAIL; + goto FreeAllocatedMem; + } } }
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