Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1 | /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL |
| 2 | * project 2006. |
| 3 | */ |
| 4 | /* ==================================================================== |
| 5 | * Copyright (c) 2006,2007 The OpenSSL Project. All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer in |
| 16 | * the documentation and/or other materials provided with the |
| 17 | * distribution. |
| 18 | * |
| 19 | * 3. All advertising materials mentioning features or use of this |
| 20 | * software must display the following acknowledgment: |
| 21 | * "This product includes software developed by the OpenSSL Project |
| 22 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
| 23 | * |
| 24 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| 25 | * endorse or promote products derived from this software without |
| 26 | * prior written permission. For written permission, please contact |
| 27 | * licensing@OpenSSL.org. |
| 28 | * |
| 29 | * 5. Products derived from this software may not be called "OpenSSL" |
| 30 | * nor may "OpenSSL" appear in their names without prior written |
| 31 | * permission of the OpenSSL Project. |
| 32 | * |
| 33 | * 6. Redistributions of any form whatsoever must retain the following |
| 34 | * acknowledgment: |
| 35 | * "This product includes software developed by the OpenSSL Project |
| 36 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
| 37 | * |
| 38 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| 39 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 40 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 41 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| 42 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 43 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 44 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 45 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 46 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 47 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 48 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 49 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 50 | * ==================================================================== |
| 51 | * |
| 52 | * This product includes cryptographic software written by Eric Young |
| 53 | * (eay@cryptsoft.com). This product includes software written by Tim |
| 54 | * Hudson (tjh@cryptsoft.com). */ |
| 55 | |
| 56 | #include <openssl/evp.h> |
| 57 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 58 | #include <openssl/err.h> |
| 59 | |
| 60 | #include "internal.h" |
Robert Sloan | 572a4e2 | 2017-04-17 10:52:19 -0700 | [diff] [blame] | 61 | #include "../fipsmodule/digest/internal.h" |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 62 | |
| 63 | |
Robert Sloan | 8ff0355 | 2017-06-14 12:40:58 -0700 | [diff] [blame] | 64 | enum evp_sign_verify_t { |
| 65 | evp_sign, |
| 66 | evp_verify, |
| 67 | }; |
| 68 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 69 | static const struct evp_md_pctx_ops md_pctx_ops = { |
| 70 | EVP_PKEY_CTX_free, |
| 71 | EVP_PKEY_CTX_dup, |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 72 | }; |
| 73 | |
Robert Sloan | 8ff0355 | 2017-06-14 12:40:58 -0700 | [diff] [blame] | 74 | static int uses_prehash(EVP_MD_CTX *ctx, enum evp_sign_verify_t op) { |
| 75 | return (op == evp_sign) ? (ctx->pctx->pmeth->sign != NULL) |
| 76 | : (ctx->pctx->pmeth->verify != NULL); |
| 77 | } |
| 78 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 79 | static int do_sigver_init(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx, |
| 80 | const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey, |
Robert Sloan | 8ff0355 | 2017-06-14 12:40:58 -0700 | [diff] [blame] | 81 | enum evp_sign_verify_t op) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 82 | if (ctx->pctx == NULL) { |
| 83 | ctx->pctx = EVP_PKEY_CTX_new(pkey, e); |
| 84 | } |
| 85 | if (ctx->pctx == NULL) { |
| 86 | return 0; |
| 87 | } |
| 88 | ctx->pctx_ops = &md_pctx_ops; |
| 89 | |
Robert Sloan | 8ff0355 | 2017-06-14 12:40:58 -0700 | [diff] [blame] | 90 | if (op == evp_verify) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 91 | if (!EVP_PKEY_verify_init(ctx->pctx)) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 92 | return 0; |
| 93 | } |
| 94 | } else { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 95 | if (!EVP_PKEY_sign_init(ctx->pctx)) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 96 | return 0; |
| 97 | } |
| 98 | } |
Robert Sloan | 8ff0355 | 2017-06-14 12:40:58 -0700 | [diff] [blame] | 99 | |
| 100 | if (type != NULL && |
| 101 | !EVP_PKEY_CTX_set_signature_md(ctx->pctx, type)) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 102 | return 0; |
| 103 | } |
Robert Sloan | 8ff0355 | 2017-06-14 12:40:58 -0700 | [diff] [blame] | 104 | |
| 105 | if (uses_prehash(ctx, op)) { |
| 106 | if (type == NULL) { |
| 107 | OPENSSL_PUT_ERROR(EVP, EVP_R_NO_DEFAULT_DIGEST); |
| 108 | return 0; |
| 109 | } |
| 110 | if (!EVP_DigestInit_ex(ctx, type, e)) { |
| 111 | return 0; |
| 112 | } |
| 113 | } |
| 114 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 115 | if (pctx) { |
| 116 | *pctx = ctx->pctx; |
| 117 | } |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 118 | return 1; |
| 119 | } |
| 120 | |
| 121 | int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx, const EVP_MD *type, |
| 122 | ENGINE *e, EVP_PKEY *pkey) { |
Robert Sloan | 8ff0355 | 2017-06-14 12:40:58 -0700 | [diff] [blame] | 123 | return do_sigver_init(ctx, pctx, type, e, pkey, evp_sign); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 124 | } |
| 125 | |
| 126 | int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx, |
| 127 | const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey) { |
Robert Sloan | 8ff0355 | 2017-06-14 12:40:58 -0700 | [diff] [blame] | 128 | return do_sigver_init(ctx, pctx, type, e, pkey, evp_verify); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 129 | } |
| 130 | |
| 131 | int EVP_DigestSignUpdate(EVP_MD_CTX *ctx, const void *data, size_t len) { |
Robert Sloan | 8ff0355 | 2017-06-14 12:40:58 -0700 | [diff] [blame] | 132 | if (!uses_prehash(ctx, evp_sign)) { |
| 133 | OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
| 134 | return 0; |
| 135 | } |
| 136 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 137 | return EVP_DigestUpdate(ctx, data, len); |
| 138 | } |
| 139 | |
| 140 | int EVP_DigestVerifyUpdate(EVP_MD_CTX *ctx, const void *data, size_t len) { |
Robert Sloan | 8ff0355 | 2017-06-14 12:40:58 -0700 | [diff] [blame] | 141 | if (!uses_prehash(ctx, evp_verify)) { |
| 142 | OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
| 143 | return 0; |
| 144 | } |
| 145 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 146 | return EVP_DigestUpdate(ctx, data, len); |
| 147 | } |
| 148 | |
| 149 | int EVP_DigestSignFinal(EVP_MD_CTX *ctx, uint8_t *out_sig, |
| 150 | size_t *out_sig_len) { |
Robert Sloan | 8ff0355 | 2017-06-14 12:40:58 -0700 | [diff] [blame] | 151 | if (!uses_prehash(ctx, evp_sign)) { |
| 152 | OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
| 153 | return 0; |
| 154 | } |
| 155 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 156 | if (out_sig) { |
| 157 | EVP_MD_CTX tmp_ctx; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 158 | int ret; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 159 | uint8_t md[EVP_MAX_MD_SIZE]; |
| 160 | unsigned int mdlen; |
| 161 | |
| 162 | EVP_MD_CTX_init(&tmp_ctx); |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 163 | ret = EVP_MD_CTX_copy_ex(&tmp_ctx, ctx) && |
| 164 | EVP_DigestFinal_ex(&tmp_ctx, md, &mdlen) && |
| 165 | EVP_PKEY_sign(ctx->pctx, out_sig, out_sig_len, md, mdlen); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 166 | EVP_MD_CTX_cleanup(&tmp_ctx); |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 167 | |
| 168 | return ret; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 169 | } else { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 170 | size_t s = EVP_MD_size(ctx->digest); |
| 171 | return EVP_PKEY_sign(ctx->pctx, out_sig, out_sig_len, NULL, s); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 172 | } |
| 173 | } |
| 174 | |
| 175 | int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const uint8_t *sig, |
| 176 | size_t sig_len) { |
Robert Sloan | 8ff0355 | 2017-06-14 12:40:58 -0700 | [diff] [blame] | 177 | if (!uses_prehash(ctx, evp_verify)) { |
| 178 | OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
| 179 | return 0; |
| 180 | } |
| 181 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 182 | EVP_MD_CTX tmp_ctx; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 183 | int ret; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 184 | uint8_t md[EVP_MAX_MD_SIZE]; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 185 | unsigned int mdlen; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 186 | |
| 187 | EVP_MD_CTX_init(&tmp_ctx); |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 188 | ret = EVP_MD_CTX_copy_ex(&tmp_ctx, ctx) && |
| 189 | EVP_DigestFinal_ex(&tmp_ctx, md, &mdlen) && |
| 190 | EVP_PKEY_verify(ctx->pctx, sig, sig_len, md, mdlen); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 191 | EVP_MD_CTX_cleanup(&tmp_ctx); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 192 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 193 | return ret; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 194 | } |
Robert Sloan | 8ff0355 | 2017-06-14 12:40:58 -0700 | [diff] [blame] | 195 | |
| 196 | int EVP_DigestSign(EVP_MD_CTX *ctx, uint8_t *out_sig, size_t *out_sig_len, |
| 197 | const uint8_t *data, size_t data_len) { |
| 198 | if (uses_prehash(ctx, evp_sign)) { |
Robert Sloan | 8f860b1 | 2017-08-28 07:37:06 -0700 | [diff] [blame^] | 199 | // If |out_sig| is NULL, the caller is only querying the maximum output |
| 200 | // length. |data| should only be incorporated in the final call. |
Robert Sloan | 8ff0355 | 2017-06-14 12:40:58 -0700 | [diff] [blame] | 201 | if (out_sig != NULL && |
| 202 | !EVP_DigestSignUpdate(ctx, data, data_len)) { |
| 203 | return 0; |
| 204 | } |
| 205 | |
| 206 | return EVP_DigestSignFinal(ctx, out_sig, out_sig_len); |
| 207 | } |
| 208 | |
| 209 | if (ctx->pctx->pmeth->sign_message == NULL) { |
| 210 | OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
| 211 | return 0; |
| 212 | } |
| 213 | |
| 214 | return ctx->pctx->pmeth->sign_message(ctx->pctx, out_sig, out_sig_len, data, |
| 215 | data_len); |
| 216 | } |
| 217 | |
| 218 | int EVP_DigestVerify(EVP_MD_CTX *ctx, const uint8_t *sig, size_t sig_len, |
| 219 | const uint8_t *data, size_t len) { |
| 220 | if (uses_prehash(ctx, evp_verify)) { |
| 221 | return EVP_DigestVerifyUpdate(ctx, data, len) && |
| 222 | EVP_DigestVerifyFinal(ctx, sig, sig_len); |
| 223 | } |
| 224 | |
| 225 | if (ctx->pctx->pmeth->verify_message == NULL) { |
| 226 | OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
| 227 | return 0; |
| 228 | } |
| 229 | |
| 230 | return ctx->pctx->pmeth->verify_message(ctx->pctx, sig, sig_len, data, len); |
| 231 | } |