diff options
Diffstat (limited to 'src/crypto/evp/evp_ctx.c')
| -rw-r--r-- | src/crypto/evp/evp_ctx.c | 512 |
1 files changed, 512 insertions, 0 deletions
diff --git a/src/crypto/evp/evp_ctx.c b/src/crypto/evp/evp_ctx.c new file mode 100644 index 0000000..a383725 --- /dev/null +++ b/src/crypto/evp/evp_ctx.c @@ -0,0 +1,512 @@ +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) + * All rights reserved. + * + * This package is an SSL implementation written + * by Eric Young (eay@cryptsoft.com). + * The implementation was written so as to conform with Netscapes SSL. + * + * This library is free for commercial and non-commercial use as long as + * the following conditions are aheared to. The following conditions + * apply to all code found in this distribution, be it the RC4, RSA, + * lhash, DES, etc., code; not just the SSL code. The SSL documentation + * included with this distribution is covered by the same copyright terms + * except that the holder is Tim Hudson (tjh@cryptsoft.com). + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. + * If this package is used in a product, Eric Young should be given attribution + * as the author of the parts of the library used. + * This can be in the form of a textual message at program startup or + * in documentation (online or textual) provided with the package. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * "This product includes cryptographic software written by + * Eric Young (eay@cryptsoft.com)" + * The word 'cryptographic' can be left out if the rouines from the library + * being used are not cryptographic related :-). + * 4. If you include any Windows specific code (or a derivative thereof) from + * the apps directory (application code) you must include an acknowledgement: + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" + * + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * The licence and distribution terms for any publically available version or + * derivative of this code cannot be changed. i.e. this code cannot simply be + * copied and put under another distribution licence + * [including the GNU Public Licence.] */ + +#include <openssl/evp.h> + +#include <stdio.h> +#include <string.h> + +#include <openssl/err.h> +#include <openssl/mem.h> +#include <openssl/obj.h> + +#include "internal.h" + + +extern const EVP_PKEY_METHOD rsa_pkey_meth; +extern const EVP_PKEY_METHOD hmac_pkey_meth; +extern const EVP_PKEY_METHOD ec_pkey_meth; + +static const EVP_PKEY_METHOD *const evp_methods[] = { + &rsa_pkey_meth, + &hmac_pkey_meth, + &ec_pkey_meth, +}; + +static const EVP_PKEY_METHOD *evp_pkey_meth_find(int type) { + unsigned i; + + for (i = 0; i < sizeof(evp_methods)/sizeof(EVP_PKEY_METHOD*); i++) { + if (evp_methods[i]->pkey_id == type) { + return evp_methods[i]; + } + } + + return NULL; +} + +static EVP_PKEY_CTX *evp_pkey_ctx_new(EVP_PKEY *pkey, ENGINE *e, int id) { + EVP_PKEY_CTX *ret; + const EVP_PKEY_METHOD *pmeth; + + if (id == -1) { + if (!pkey || !pkey->ameth) { + return NULL; + } + id = pkey->ameth->pkey_id; + } + + pmeth = evp_pkey_meth_find(id); + + if (pmeth == NULL) { + OPENSSL_PUT_ERROR(EVP, evp_pkey_ctx_new, EVP_R_UNSUPPORTED_ALGORITHM); + const char *name = OBJ_nid2sn(id); + ERR_add_error_dataf("algorithm %d (%s)", id, name); + return NULL; + } + + ret = OPENSSL_malloc(sizeof(EVP_PKEY_CTX)); + if (!ret) { + OPENSSL_PUT_ERROR(EVP, evp_pkey_ctx_new, ERR_R_MALLOC_FAILURE); + return NULL; + } + memset(ret, 0, sizeof(EVP_PKEY_CTX)); + + ret->engine = e; + ret->pmeth = pmeth; + ret->operation = EVP_PKEY_OP_UNDEFINED; + + if (pkey) { + ret->pkey = EVP_PKEY_dup(pkey); + } + + if (pmeth->init) { + if (pmeth->init(ret) <= 0) { + if (pkey) { + EVP_PKEY_free(ret->pkey); + } + OPENSSL_free(ret); + return NULL; + } + } + + return ret; +} + +EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e) { + return evp_pkey_ctx_new(pkey, e, -1); +} + +EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e) { + return evp_pkey_ctx_new(NULL, e, id); +} + +void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx) { + if (ctx == NULL) { + return; + } + if (ctx->pmeth && ctx->pmeth->cleanup) { + ctx->pmeth->cleanup(ctx); + } + if (ctx->pkey) { + EVP_PKEY_free(ctx->pkey); + } + if (ctx->peerkey) { + EVP_PKEY_free(ctx->peerkey); + } + OPENSSL_free(ctx); +} + +EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx) { + EVP_PKEY_CTX *rctx; + + if (!pctx->pmeth || !pctx->pmeth->copy) { + return NULL; + } + + rctx = OPENSSL_malloc(sizeof(EVP_PKEY_CTX)); + if (!rctx) { + return NULL; + } + + memset(rctx, 0, sizeof(EVP_PKEY_CTX)); + + rctx->pmeth = pctx->pmeth; + rctx->engine = pctx->engine; + rctx->operation = pctx->operation; + + if (pctx->pkey) { + rctx->pkey = EVP_PKEY_dup(pctx->pkey); + if (rctx->pkey == NULL) { + goto err; + } + } + + if (pctx->peerkey) { + rctx->peerkey = EVP_PKEY_dup(pctx->peerkey); + if (rctx->peerkey == NULL) { + goto err; + } + } + + if (pctx->pmeth->copy(rctx, pctx) > 0) { + return rctx; + } + +err: + EVP_PKEY_CTX_free(rctx); + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_CTX_dup, ERR_LIB_EVP); + return NULL; +} + +EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx) { return ctx->pkey; } + +void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data) { + ctx->app_data = data; +} + +void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx) { return ctx->app_data; } + +int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype, int cmd, + int p1, void *p2) { + int ret; + if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_CTX_ctrl, EVP_R_COMMAND_NOT_SUPPORTED); + return -2; + } + if (keytype != -1 && ctx->pmeth->pkey_id != keytype) { + return -1; + } + + if (ctx->operation == EVP_PKEY_OP_UNDEFINED) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_CTX_ctrl, EVP_R_NO_OPERATION_SET); + return -1; + } + + if (optype != -1 && !(ctx->operation & optype)) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_CTX_ctrl, EVP_R_INVALID_OPERATION); + return -1; + } + + ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2); + + if (ret == -2) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_CTX_ctrl, EVP_R_COMMAND_NOT_SUPPORTED); + } + + return ret; +} + +int EVP_PKEY_sign_init(EVP_PKEY_CTX *ctx) { + if (!ctx || !ctx->pmeth || !ctx->pmeth->sign) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_sign_init, + EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + return 0; + } + + ctx->operation = EVP_PKEY_OP_SIGN; + if (!ctx->pmeth->sign_init) { + return 1; + } + + if (!ctx->pmeth->sign_init(ctx)) { + ctx->operation = EVP_PKEY_OP_UNDEFINED; + return 0; + } + + return 1; +} + +int EVP_PKEY_sign(EVP_PKEY_CTX *ctx, uint8_t *sig, size_t *sig_len, + const uint8_t *data, size_t data_len) { + if (!ctx || !ctx->pmeth || !ctx->pmeth->sign) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_sign, + EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + return 0; + } + if (ctx->operation != EVP_PKEY_OP_SIGN) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_sign, EVP_R_OPERATON_NOT_INITIALIZED); + return 0; + } + return ctx->pmeth->sign(ctx, sig, sig_len, data, data_len); +} + +int EVP_PKEY_verify_init(EVP_PKEY_CTX *ctx) { + if (!ctx || !ctx->pmeth || !ctx->pmeth->verify) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_verify_init, + EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + return 0; + } + ctx->operation = EVP_PKEY_OP_VERIFY; + if (!ctx->pmeth->verify_init) { + return 1; + } + if (!ctx->pmeth->verify_init(ctx)) { + ctx->operation = EVP_PKEY_OP_UNDEFINED; + return 0; + } + + return 1; +} + +int EVP_PKEY_verify(EVP_PKEY_CTX *ctx, const uint8_t *sig, size_t sig_len, + const uint8_t *data, size_t data_len) { + if (!ctx || !ctx->pmeth || !ctx->pmeth->verify) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_verify, + EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + return 0; + } + if (ctx->operation != EVP_PKEY_OP_VERIFY) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_verify, EVP_R_OPERATON_NOT_INITIALIZED); + return 0; + } + return ctx->pmeth->verify(ctx, sig, sig_len, data, data_len); +} + +int EVP_PKEY_encrypt_init(EVP_PKEY_CTX *ctx) { + if (!ctx || !ctx->pmeth || !ctx->pmeth->encrypt) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_encrypt_init, + EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + return 0; + } + ctx->operation = EVP_PKEY_OP_ENCRYPT; + if (!ctx->pmeth->encrypt_init) { + return 1; + } + if (!ctx->pmeth->encrypt_init(ctx)) { + ctx->operation = EVP_PKEY_OP_UNDEFINED; + return 0; + } + return 1; +} + +int EVP_PKEY_encrypt(EVP_PKEY_CTX *ctx, uint8_t *out, size_t *outlen, + const uint8_t *in, size_t inlen) { + if (!ctx || !ctx->pmeth || !ctx->pmeth->encrypt) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_encrypt, + EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + return 0; + } + if (ctx->operation != EVP_PKEY_OP_ENCRYPT) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_encrypt, EVP_R_OPERATON_NOT_INITIALIZED); + return 0; + } + return ctx->pmeth->encrypt(ctx, out, outlen, in, inlen); +} + +int EVP_PKEY_decrypt_init(EVP_PKEY_CTX *ctx) { + if (!ctx || !ctx->pmeth || !ctx->pmeth->decrypt) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_decrypt_init, + EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + return 0; + } + ctx->operation = EVP_PKEY_OP_DECRYPT; + if (!ctx->pmeth->decrypt_init) { + return 1; + } + if (!ctx->pmeth->decrypt_init(ctx)) { + ctx->operation = EVP_PKEY_OP_UNDEFINED; + return 0; + } + return 1; +} + +int EVP_PKEY_decrypt(EVP_PKEY_CTX *ctx, uint8_t *out, size_t *outlen, + const uint8_t *in, size_t inlen) { + if (!ctx || !ctx->pmeth || !ctx->pmeth->decrypt) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_decrypt, + EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + return 0; + } + if (ctx->operation != EVP_PKEY_OP_DECRYPT) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_decrypt, EVP_R_OPERATON_NOT_INITIALIZED); + return 0; + } + return ctx->pmeth->decrypt(ctx, out, outlen, in, inlen); +} + +int EVP_PKEY_derive_init(EVP_PKEY_CTX *ctx) { + if (!ctx || !ctx->pmeth || !ctx->pmeth->derive) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_derive_init, + EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + return 0; + } + ctx->operation = EVP_PKEY_OP_DERIVE; + if (!ctx->pmeth->derive_init) { + return 1; + } + if (!ctx->pmeth->derive_init(ctx)) { + ctx->operation = EVP_PKEY_OP_UNDEFINED; + return 0; + } + return 1; +} + +int EVP_PKEY_derive_set_peer(EVP_PKEY_CTX *ctx, EVP_PKEY *peer) { + int ret; + if (!ctx || !ctx->pmeth || + !(ctx->pmeth->derive || ctx->pmeth->encrypt || ctx->pmeth->decrypt) || + !ctx->pmeth->ctrl) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_derive_set_peer, + EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + return 0; + } + if (ctx->operation != EVP_PKEY_OP_DERIVE && + ctx->operation != EVP_PKEY_OP_ENCRYPT && + ctx->operation != EVP_PKEY_OP_DECRYPT) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_derive_set_peer, + EVP_R_OPERATON_NOT_INITIALIZED); + return 0; + } + + ret = ctx->pmeth->ctrl(ctx, EVP_PKEY_CTRL_PEER_KEY, 0, peer); + + if (ret <= 0) { + return 0; + } + + if (ret == 2) { + return 1; + } + + if (!ctx->pkey) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_derive_set_peer, EVP_R_NO_KEY_SET); + return 0; + } + + if (ctx->pkey->type != peer->type) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_derive_set_peer, EVP_R_DIFFERENT_KEY_TYPES); + return 0; + } + + /* ran@cryptocom.ru: For clarity. The error is if parameters in peer are + * present (!missing) but don't match. EVP_PKEY_cmp_parameters may return + * 1 (match), 0 (don't match) and -2 (comparison is not defined). -1 + * (different key types) is impossible here because it is checked earlier. + * -2 is OK for us here, as well as 1, so we can check for 0 only. */ + if (!EVP_PKEY_missing_parameters(peer) && + !EVP_PKEY_cmp_parameters(ctx->pkey, peer)) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_derive_set_peer, + EVP_R_DIFFERENT_PARAMETERS); + return 0; + } + + if (ctx->peerkey) { + EVP_PKEY_free(ctx->peerkey); + } + ctx->peerkey = peer; + + ret = ctx->pmeth->ctrl(ctx, EVP_PKEY_CTRL_PEER_KEY, 1, peer); + + if (ret <= 0) { + ctx->peerkey = NULL; + return 0; + } + + EVP_PKEY_dup(peer); + return 1; +} + +int EVP_PKEY_derive(EVP_PKEY_CTX *ctx, uint8_t *key, size_t *out_key_len) { + if (!ctx || !ctx->pmeth || !ctx->pmeth->derive) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_derive, + EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + return 0; + } + if (ctx->operation != EVP_PKEY_OP_DERIVE) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_derive, EVP_R_OPERATON_NOT_INITIALIZED); + return 0; + } + return ctx->pmeth->derive(ctx, key, out_key_len); +} + +int EVP_PKEY_keygen_init(EVP_PKEY_CTX *ctx) { + if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_keygen_init, + EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + return 0; + } + ctx->operation = EVP_PKEY_OP_KEYGEN; + if (!ctx->pmeth->keygen_init) { + return 1; + } + if (!ctx->pmeth->keygen_init(ctx)) { + ctx->operation = EVP_PKEY_OP_UNDEFINED; + return 0; + } + return 1; +} + +int EVP_PKEY_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey) { + if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_keygen, + EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + return 0; + } + if (ctx->operation != EVP_PKEY_OP_KEYGEN) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_keygen, EVP_R_OPERATON_NOT_INITIALIZED); + return 0; + } + + if (!ppkey) { + return 0; + } + + if (!*ppkey) { + *ppkey = EVP_PKEY_new(); + if (!*ppkey) { + OPENSSL_PUT_ERROR(EVP, EVP_PKEY_keygen, ERR_LIB_EVP); + return 0; + } + } + + if (!ctx->pmeth->keygen(ctx, *ppkey)) { + EVP_PKEY_free(*ppkey); + *ppkey = NULL; + return 0; + } + return 1; +} |