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Motivation: Requiring the system's SSL library was a constant source of problems. Modifications: This is the patch that transitions swift-nio-ssl to use BoringSSL, as discussed in [the Swift forums](https://forums.swift.org/t/rfc-moving-swiftnio-ssl-to-boringssl/18280). Result: Easier SSL support
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| /* Copyright (C) 1995-1998 Eric Young ([email protected]) | ||
| * All rights reserved. | ||
| * | ||
| * This package is an SSL implementation written | ||
| * by Eric Young ([email protected]). | ||
| * 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 ([email protected]). | ||
| * | ||
| * 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 ([email protected])" | ||
| * 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 ([email protected])" | ||
| * | ||
| * 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/asn1.h" | ||
|
|
||
| #include "limits.h" | ||
| #include "string.h" | ||
|
|
||
| #include "openssl/err.h" | ||
| #include "openssl/mem.h" | ||
|
|
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| #include "../internal.h" | ||
|
|
||
|
|
||
| int ASN1_BIT_STRING_set(ASN1_BIT_STRING *x, unsigned char *d, int len) | ||
| { | ||
| return M_ASN1_BIT_STRING_set(x, d, len); | ||
| } | ||
|
|
||
| int i2c_ASN1_BIT_STRING(ASN1_BIT_STRING *a, unsigned char **pp) | ||
| { | ||
| int ret, j, bits, len; | ||
| unsigned char *p, *d; | ||
|
|
||
| if (a == NULL) | ||
| return (0); | ||
|
|
||
| len = a->length; | ||
|
|
||
| if (len > 0) { | ||
| if (a->flags & ASN1_STRING_FLAG_BITS_LEFT) { | ||
| bits = (int)a->flags & 0x07; | ||
| } else { | ||
| for (; len > 0; len--) { | ||
| if (a->data[len - 1]) | ||
| break; | ||
| } | ||
| j = a->data[len - 1]; | ||
| if (j & 0x01) | ||
| bits = 0; | ||
| else if (j & 0x02) | ||
| bits = 1; | ||
| else if (j & 0x04) | ||
| bits = 2; | ||
| else if (j & 0x08) | ||
| bits = 3; | ||
| else if (j & 0x10) | ||
| bits = 4; | ||
| else if (j & 0x20) | ||
| bits = 5; | ||
| else if (j & 0x40) | ||
| bits = 6; | ||
| else if (j & 0x80) | ||
| bits = 7; | ||
| else | ||
| bits = 0; /* should not happen */ | ||
| } | ||
| } else | ||
| bits = 0; | ||
|
|
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| ret = 1 + len; | ||
| if (pp == NULL) | ||
| return (ret); | ||
|
|
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| p = *pp; | ||
|
|
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| *(p++) = (unsigned char)bits; | ||
| d = a->data; | ||
| OPENSSL_memcpy(p, d, len); | ||
| p += len; | ||
| if (len > 0) | ||
| p[-1] &= (0xff << bits); | ||
| *pp = p; | ||
| return (ret); | ||
| } | ||
|
|
||
| ASN1_BIT_STRING *c2i_ASN1_BIT_STRING(ASN1_BIT_STRING **a, | ||
| const unsigned char **pp, long len) | ||
| { | ||
| ASN1_BIT_STRING *ret = NULL; | ||
| const unsigned char *p; | ||
| unsigned char *s; | ||
| int padding; | ||
|
|
||
| if (len < 1) { | ||
| OPENSSL_PUT_ERROR(ASN1, ASN1_R_STRING_TOO_SHORT); | ||
| goto err; | ||
| } | ||
|
|
||
| if (len > INT_MAX) { | ||
| OPENSSL_PUT_ERROR(ASN1, ASN1_R_STRING_TOO_LONG); | ||
| goto err; | ||
| } | ||
|
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||
| if ((a == NULL) || ((*a) == NULL)) { | ||
| if ((ret = M_ASN1_BIT_STRING_new()) == NULL) | ||
| return (NULL); | ||
| } else | ||
| ret = (*a); | ||
|
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| p = *pp; | ||
| padding = *(p++); | ||
| if (padding > 7) { | ||
| OPENSSL_PUT_ERROR(ASN1, ASN1_R_INVALID_BIT_STRING_BITS_LEFT); | ||
| goto err; | ||
| } | ||
|
|
||
| /* | ||
| * We do this to preserve the settings. If we modify the settings, via | ||
| * the _set_bit function, we will recalculate on output | ||
| */ | ||
| ret->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); /* clear */ | ||
| ret->flags |= (ASN1_STRING_FLAG_BITS_LEFT | padding); /* set */ | ||
|
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||
| if (len-- > 1) { /* using one because of the bits left byte */ | ||
| s = (unsigned char *)OPENSSL_malloc((int)len); | ||
| if (s == NULL) { | ||
| OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE); | ||
| goto err; | ||
| } | ||
| OPENSSL_memcpy(s, p, (int)len); | ||
| s[len - 1] &= (0xff << padding); | ||
| p += len; | ||
| } else | ||
| s = NULL; | ||
|
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| ret->length = (int)len; | ||
| if (ret->data != NULL) | ||
| OPENSSL_free(ret->data); | ||
| ret->data = s; | ||
| ret->type = V_ASN1_BIT_STRING; | ||
| if (a != NULL) | ||
| (*a) = ret; | ||
| *pp = p; | ||
| return (ret); | ||
| err: | ||
| if ((ret != NULL) && ((a == NULL) || (*a != ret))) | ||
| M_ASN1_BIT_STRING_free(ret); | ||
| return (NULL); | ||
| } | ||
|
|
||
| /* | ||
| * These next 2 functions from Goetz Babin-Ebell <[email protected]> | ||
| */ | ||
| int ASN1_BIT_STRING_set_bit(ASN1_BIT_STRING *a, int n, int value) | ||
| { | ||
| int w, v, iv; | ||
| unsigned char *c; | ||
|
|
||
| w = n / 8; | ||
| v = 1 << (7 - (n & 0x07)); | ||
| iv = ~v; | ||
| if (!value) | ||
| v = 0; | ||
|
|
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| if (a == NULL) | ||
| return 0; | ||
|
|
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| a->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); /* clear, set on write */ | ||
|
|
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| if ((a->length < (w + 1)) || (a->data == NULL)) { | ||
| if (!value) | ||
| return (1); /* Don't need to set */ | ||
| if (a->data == NULL) | ||
| c = (unsigned char *)OPENSSL_malloc(w + 1); | ||
| else | ||
| c = (unsigned char *)OPENSSL_realloc(a->data, w + 1); | ||
| if (c == NULL) { | ||
| OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE); | ||
| return 0; | ||
| } | ||
| if (w + 1 - a->length > 0) | ||
| OPENSSL_memset(c + a->length, 0, w + 1 - a->length); | ||
| a->data = c; | ||
| a->length = w + 1; | ||
| } | ||
| a->data[w] = ((a->data[w]) & iv) | v; | ||
| while ((a->length > 0) && (a->data[a->length - 1] == 0)) | ||
| a->length--; | ||
| return (1); | ||
| } | ||
|
|
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| int ASN1_BIT_STRING_get_bit(ASN1_BIT_STRING *a, int n) | ||
| { | ||
| int w, v; | ||
|
|
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| w = n / 8; | ||
| v = 1 << (7 - (n & 0x07)); | ||
| if ((a == NULL) || (a->length < (w + 1)) || (a->data == NULL)) | ||
| return (0); | ||
| return ((a->data[w] & v) != 0); | ||
| } | ||
|
|
||
| /* | ||
| * Checks if the given bit string contains only bits specified by | ||
| * the flags vector. Returns 0 if there is at least one bit set in 'a' | ||
| * which is not specified in 'flags', 1 otherwise. | ||
| * 'len' is the length of 'flags'. | ||
| */ | ||
| int ASN1_BIT_STRING_check(ASN1_BIT_STRING *a, | ||
| unsigned char *flags, int flags_len) | ||
| { | ||
| int i, ok; | ||
| /* Check if there is one bit set at all. */ | ||
| if (!a || !a->data) | ||
| return 1; | ||
|
|
||
| /* | ||
| * Check each byte of the internal representation of the bit string. | ||
| */ | ||
| ok = 1; | ||
| for (i = 0; i < a->length && ok; ++i) { | ||
| unsigned char mask = i < flags_len ? ~flags[i] : 0xff; | ||
| /* We are done if there is an unneeded bit set. */ | ||
| ok = (a->data[i] & mask) == 0; | ||
| } | ||
| return ok; | ||
| } |
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