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f873e58650
libxcrypt/libxcrypt-rh1592445.patch
Florian Weimer f873e58650 Remove SUNMD5 support (#1592445)
2018-06-29 14:45:29 +02:00

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Remove SUNMD5 support due to potential incompatibility with the CDDL
license. According to
https://lists.fedoraproject.org/archives/list/legal@lists.fedoraproject.org/message/KCDXNZJQ4S24NVB6OUPDGQA2VF53YZIT/
we do not have to repackage the source tarball, patching out the code
like this is sufficient.
diff --git a/Makefile.am b/Makefile.am
index a7e726f9cb82a4b1..ca2b0accf886895d 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -115,7 +115,6 @@ check_PROGRAMS = \
if ENABLE_WEAK_HASHES
libcrypt_la_SOURCES += \
crypt-md5.c crypt-des.c crypt-nthash.c crypt-pbkdf1-sha1.c \
- crypt-sunmd5.c \
alg-des.c alg-hmac-sha1.c alg-md4.c alg-md5.c alg-sha1.c
nodist_libcrypt_la_SOURCES = \
@@ -146,7 +145,7 @@ check_PROGRAMS += \
test-alg-des test-alg-hmac-sha1 test-alg-md4 \
test-alg-md5 test-alg-sha1 \
test-crypt-badsalt test-crypt-des test-crypt-md5 \
- test-crypt-nthash test-crypt-sunmd5 test-crypt-pbkdf1-sha1
+ test-crypt-nthash test-crypt-pbkdf1-sha1
endif
if ENABLE_OBSOLETE_API
@@ -187,7 +186,6 @@ test_crypt_nthash_LDADD = libcrypt.la
test_crypt_pbkdf1_sha1_LDADD = libcrypt.la
test_crypt_sha256_LDADD = libcrypt.la
test_crypt_sha512_LDADD = libcrypt.la
-test_crypt_sunmd5_LDADD = libcrypt.la
test_gensalt_LDADD = libcrypt.la
test_des_obsolete_LDADD = libcrypt.la
test_des_obsolete_r_LDADD = libcrypt.la
diff --git a/crypt-port.h b/crypt-port.h
index 2b74ec9ef7252ba4..6331d56391a0b093 100644
--- a/crypt-port.h
+++ b/crypt-port.h
@@ -219,7 +219,6 @@ void _xcrypt_secure_memset (void *s, size_t len)
#define crypt_md5_rn _crypt_crypt_md5_rn
#define crypt_nthash_rn _crypt_crypt_nthash_rn
#define crypt_sha1_rn _crypt_crypt_sha1_rn
-#define crypt_sunmd5_rn _crypt_crypt_sunmd5_rn
#define des_crypt_block _crypt_des_crypt_block
#define des_set_key _crypt_des_set_key
#define des_set_salt _crypt_des_set_salt
@@ -230,7 +229,6 @@ void _xcrypt_secure_memset (void *s, size_t len)
#define gensalt_md5_rn _crypt_gensalt_md5_rn
#define gensalt_nthash_rn _crypt_gensalt_nthash_rn
#define gensalt_sha1_rn _crypt_gensalt_sha1_rn
-#define gensalt_sunmd5_rn _crypt_gensalt_sunmd5_rn
#define ip_maskl _crypt_ip_maskl
#define ip_maskr _crypt_ip_maskr
#define key_perm_maskl _crypt_key_perm_maskl
diff --git a/crypt-private.h b/crypt-private.h
index 80a916d76181ed66..c595c0fc163b2639 100644
--- a/crypt-private.h
+++ b/crypt-private.h
@@ -54,9 +54,6 @@ extern void crypt_nthash_rn (const char *phrase, const char *setting,
extern void crypt_sha1_rn (const char *phrase, const char *setting,
uint8_t *output, size_t o_size,
void *scratch, size_t s_size);
-extern void crypt_sunmd5_rn (const char *phrase, const char *setting,
- uint8_t *output, size_t o_size,
- void *scratch, size_t s_size);
#endif
extern void crypt_sha256_rn (const char *phrase, const char *setting,
@@ -85,9 +82,6 @@ extern void gensalt_nthash_rn (unsigned long count,
extern void gensalt_sha1_rn (unsigned long count,
const uint8_t *rbytes, size_t nrbytes,
uint8_t *output, size_t o_size);
-extern void gensalt_sunmd5_rn (unsigned long count,
- const uint8_t *rbytes, size_t nrbytes,
- uint8_t *output, size_t o_size);
#endif
extern void gensalt_sha256_rn (unsigned long count,
diff --git a/crypt-sunmd5.c b/crypt-sunmd5.c
deleted file mode 100644
index 43054b96be357df3..0000000000000000
--- a/crypt-sunmd5.c
+++ /dev/null
@@ -1,421 +0,0 @@
-/*
- * CDDL HEADER START
- *
- * The contents of this file are subject to the terms of the
- * Common Development and Distribution License, Version 1.0 only
- * (the "License"). You may not use this file except in compliance
- * with the License.
- *
- * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
- * or http://www.opensolaris.org/os/licensing.
- * See the License for the specific language governing permissions
- * and limitations under the License.
- *
- * When distributing Covered Code, include this CDDL HEADER in each
- * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
- * If applicable, add the following below this CDDL HEADER, with the
- * fields enclosed by brackets "[]" replaced with your own identifying
- * information: Portions Copyright [yyyy] [name of copyright owner]
- *
- * CDDL HEADER END
- */
-/*
- * Copyright 2003 Sun Microsystems, Inc. All rights reserved.
- * Use is subject to license terms.
- */
-
-#include "crypt-port.h"
-#include "crypt-private.h"
-#include "alg-md5.h"
-
-#include <errno.h>
-#include <stdlib.h>
-#include <stdio.h>
-
-#define CRYPT_ALGNAME "md5"
-
-/* minimum number of rounds we do, not including the per-user ones */
-#define BASIC_ROUND_COUNT 4096 /* enough to make things interesting */
-#define DIGEST_LEN 16
-#define ROUND_BUFFER_LEN 64
-
-/*
- * Public domain quotation courtesy of Project Gutenberg.
- * ftp://metalab.unc.edu/pub/docs/books/gutenberg/etext98/2ws2610.txt
- * Hamlet III.ii - 1517 bytes, including trailing NUL
- * ANSI-C string constant concatenation is a requirement here.
- */
-static const char constant_phrase[] =
- "To be, or not to be,--that is the question:--\n"
- "Whether 'tis nobler in the mind to suffer\n"
- "The slings and arrows of outrageous fortune\n"
- "Or to take arms against a sea of troubles,\n"
- "And by opposing end them?--To die,--to sleep,--\n"
- "No more; and by a sleep to say we end\n"
- "The heartache, and the thousand natural shocks\n"
- "That flesh is heir to,--'tis a consummation\n"
- "Devoutly to be wish'd. To die,--to sleep;--\n"
- "To sleep! perchance to dream:--ay, there's the rub;\n"
- "For in that sleep of death what dreams may come,\n"
- "When we have shuffled off this mortal coil,\n"
- "Must give us pause: there's the respect\n"
- "That makes calamity of so long life;\n"
- "For who would bear the whips and scorns of time,\n"
- "The oppressor's wrong, the proud man's contumely,\n"
- "The pangs of despis'd love, the law's delay,\n"
- "The insolence of office, and the spurns\n"
- "That patient merit of the unworthy takes,\n"
- "When he himself might his quietus make\n"
- "With a bare bodkin? who would these fardels bear,\n"
- "To grunt and sweat under a weary life,\n"
- "But that the dread of something after death,--\n"
- "The undiscover'd country, from whose bourn\n"
- "No traveller returns,--puzzles the will,\n"
- "And makes us rather bear those ills we have\n"
- "Than fly to others that we know not of?\n"
- "Thus conscience does make cowards of us all;\n"
- "And thus the native hue of resolution\n"
- "Is sicklied o'er with the pale cast of thought;\n"
- "And enterprises of great pith and moment,\n"
- "With this regard, their currents turn awry,\n"
- "And lose the name of action.--Soft you now!\n"
- "The fair Ophelia!--Nymph, in thy orisons\n"
- "Be all my sins remember'd.\n";
-
-/* ------------------------------------------------------------------ */
-
-static int
-md5bit (uint8_t *digest, int bit_num)
-{
- int byte_off;
- int bit_off;
-
- bit_num %= 128; /* keep this bounded for convenience */
- byte_off = bit_num / 8;
- bit_off = bit_num % 8;
-
- /* return the value of bit N from the digest */
- return ((digest[byte_off] & (0x01 << bit_off)) ? 1 : 0);
-}
-
-/* 0 ... 63 => ascii - 64 */
-static unsigned char itoa64[] =
- "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
-
-static void
-to64 (char *s, uint64_t v, int n)
-{
- while (--n >= 0)
- {
- *s++ = (char)itoa64[v&0x3f];
- v >>= 6;
- }
-}
-
-#define ROUNDS "rounds="
-#define ROUNDSLEN (sizeof (ROUNDS) - 1)
-
-/*
- * get the integer value after rounds= where ever it occurs in the string.
- * if the last char after the int is a , or $ that is fine anything else is an
- * error.
- */
-static uint32_t
-getrounds (const char *s)
-{
- char *r, *p, *e;
- long val;
-
- if (s == NULL)
- return (0);
-
- if ((r = strstr (s, ROUNDS)) == NULL)
- return (0);
-
- if (strncmp (r, ROUNDS, ROUNDSLEN) != 0)
- return (0);
-
- p = r + ROUNDSLEN;
- errno = 0;
- val = strtol (p, &e, 10);
- /*
- * An error occured or there is non-numeric stuff at the end
- * which isn't one of the crypt(3c) special chars ',' or '$'
- */
- if (errno != 0 || val < 0 ||
- !(*e == '\0' || *e == ',' || *e == '$'))
- {
- return (0);
- }
-
- return ((uint32_t)val);
-}
-
-void
-gensalt_sunmd5_rn (unsigned long count,
- const uint8_t *rbytes, size_t nrbytes,
- uint8_t *output, size_t o_size)
-{
- /* This should not happen, but. */
- if ((nrbytes < sizeof (uint64_t)) || (o_size < 33))
- {
- errno = ERANGE;
- return;
- }
-
- uint64_t rndval;
- char rndstr[sizeof (rndval) + 1]; /* rndval as a base64 string */
- const uint8_t minrounds = 15; /* Min. number of rounds = 2^X */
-
- /* Set count to a reasonable random value,
- if count was not set high enough by the
- caller. */
- if (count < (unsigned long)(1 << minrounds))
- {
- uint64_t rand1, rand2;
- get_random_bytes(&rand1, sizeof (uint64_t));
- get_random_bytes(&rand2, sizeof (uint64_t));
- count = (long unsigned int)(1 << ((rand1 % 2) + minrounds));
- count += (long unsigned int)(rand2 % (uint64_t)((1 << (minrounds - 1)) + 1));
- }
-
- memcpy (&rndval, rbytes, sizeof (rndval));
- to64 ((char *)&rndstr, rndval, sizeof (rndval));
- rndstr[sizeof (rndstr) - 1] = '\0';
-
- /* Generated salt is at least 27 bytes
- and a maximum of 32 bytes long. */
- snprintf ((char *)output, o_size,
- "$" CRYPT_ALGNAME "," ROUNDS "%u$%s$",
- (unsigned int)count, rndstr);
-}
-
-void
-crypt_sunmd5_rn (const char *phrase, const char *setting,
- uint8_t *output, size_t o_size,
- void *scratch, size_t s_size)
-{
- /* put all the sensitive data in a struct */
- struct sunmd5_ctx
- {
- struct md5_ctx context; /* working buffer for MD5 algorithm */
- uint8_t digest[DIGEST_LEN]; /* where the MD5 digest is stored */
-
- int indirect_4[16]; /* extracted array of 4bit values */
- int shift_4[16]; /* shift schedule, vals 0..4 */
-
- int s7shift; /* shift for shift_7 creation, vals 0..7 */
- int indirect_7[16]; /* extracted array of 7bit values */
- int shift_7[16]; /* shift schedule, vals 0..1 */
-
- int indirect_a; /* 7bit index into digest */
- int shift_a; /* shift schedule, vals 0..1 */
-
- int indirect_b; /* 7bit index into digest */
- int shift_b; /* shift schedule, vals 0..1 */
-
- int bit_a; /* single bit for cointoss */
- int bit_b; /* single bit for cointoss */
-
- char roundascii[ROUND_BUFFER_LEN]; /* ascii rep of roundcount */
- };
-
- /* Scratch space needs to be large enough
- to fit struct sunmd5_ctx. Output must
- be able to fit up to 32 bytes for the
- setting + '$' + 22 bytes of hash. */
- if (s_size < sizeof (struct sunmd5_ctx) || (o_size < 32 + 1 + 22))
- {
- errno = ERANGE;
- return;
- }
-
- /* If the magic does not match, this
- should not have been called. */
- if (!strncmp ("$" CRYPT_ALGNAME, setting, sizeof ("$" CRYPT_ALGNAME)))
- {
- errno = EINVAL;
- return;
- }
-
- int i;
- int round;
- uint32_t maxrounds = BASIC_ROUND_COUNT;
- uint32_t l;
- char *puresalt;
- char *saltend;
- char *p;
- struct sunmd5_ctx *data = scratch;
-
- /*
- * Extract the puresalt (if it exists) from the existing salt string
- * $md5[,rounds=%d]$<puresalt>$<optional existing encoding>
- */
- saltend = strrchr (setting, '$');
-
- if (saltend == NULL || saltend == setting)
- {
- errno = EINVAL;
- return;
- }
-
- if (saltend[1] != '\0')
- {
- size_t len = (size_t)(saltend - setting + 1);
-
- if ((puresalt = malloc (len)) == NULL)
- /* malloc() is supposed to set errno == ENOMEM. */
- return;
-
- /* The original implementation used strlcpy(),
- which is not portable. Since strlcpy()
- always terminated a C string properly after
- copying len - 1 bytes of data, we need to
- do that manually. */
- (void)strncpy (puresalt, setting, len);
- puresalt[len - 1] = '\0';
- }
- else
- {
- puresalt = strdup(setting);
-
- if (puresalt == NULL)
- {
- /* strdup() is supposed to set errno == ENOMEM. */
- return;
- }
- }
-
- /* There must not be any dollar sign '$', but
- the last character before the terminating
- '\0' in the string containing the salt. */
- if (puresalt[strlen (puresalt) - 2] == '$')
- {
- errno = EINVAL;
- return;
- }
-
- maxrounds += getrounds (setting);
-
- /* initialise the context */
- md5_init_ctx (&(data->context));
-
- /* update with the (hopefully entropic) plaintext */
- md5_process_bytes ((const unsigned char *)phrase, strlen (phrase), &(data->context));
-
- /* update with the (publically known) salt */
- md5_process_bytes ((unsigned char *)puresalt, strlen (puresalt), &(data->context));
-
-
- /* compute the digest */
- md5_finish_ctx (&(data->context), &(data->digest));
-
- /*
- * now to delay high-speed md5 implementations that have stuff
- * like code inlining, loops unrolled and table lookup
- */
-
- for (round = 0; (uint32_t)round < maxrounds; round++)
- {
- /* re-initialise the context */
- md5_init_ctx (&(data->context));
-
- /* update with the previous digest */
- md5_process_bytes (&(data->digest), sizeof (data->digest), &(data->context));
-
- /* populate the shift schedules for use later */
- for (i = 0; i < 16; i++)
- {
- int j;
-
- /* offset 3 -> occasionally span more than 1 int32 fetch */
- j = (i + 3) % 16;
- data->s7shift = data->digest[i] % 8;
- data->shift_4[i] = data->digest[j] % 5;
- data->shift_7[i] = (data->digest[j] >> data->s7shift) & 0x01;
- }
-
- data->shift_a = md5bit (data->digest, round);
- data->shift_b = md5bit (data->digest, round + 64);
-
- /* populate indirect_4 with 4bit values extracted from digest */
- for (i = 0; i < 16; i++)
- /* shift the digest byte and extract four bits */
- data->indirect_4[i] = (data->digest[i] >> data->shift_4[i]) & 0x0f;
-
- /*
- * populate indirect_7 with 7bit values from digest
- * indexed via indirect_4
- */
-
- for (i = 0; i < 16; i++)
- /* shift the digest byte and extract seven bits */
- data->indirect_7[i] = (data->digest[data->indirect_4[i]]
- >> data->shift_7[i]) & 0x7f;
-
- /*
- * use the 7bit values to indirect into digest,
- * and create two 8bit values from the results.
- */
- data->indirect_a = data->indirect_b = 0;
-
- for (i = 0; i < 8; i++)
- {
- data->indirect_a |= (md5bit (data->digest,
- data->indirect_7[i]) << i);
-
- data->indirect_b |= (md5bit (data->digest,
- data->indirect_7[i + 8]) << i);
- }
-
- /* shall we utilise the top or bottom 7 bits? */
- data->indirect_a = (data->indirect_a >> data->shift_a) & 0x7f;
- data->indirect_b = (data->indirect_b >> data->shift_b) & 0x7f;
-
- /* extract two data->digest bits */
- data->bit_a = md5bit (data->digest, data->indirect_a);
- data->bit_b = md5bit (data->digest, data->indirect_b);
-
- /* xor a coin-toss; if true, mix-in the constant phrase */
-
- if (data->bit_a ^ data->bit_b)
- md5_process_bytes ((const unsigned char *) constant_phrase,
- sizeof (constant_phrase),
- &(data->context));
-
- /* digest a decimal sprintf of the current roundcount */
- snprintf (data->roundascii, ROUND_BUFFER_LEN, "%d", round);
- md5_process_bytes ((unsigned char *) data->roundascii,
- strlen (data->roundascii),
- &(data->context));
-
- /* compute/flush the digest, and loop */
- md5_finish_ctx (&(data->context), &(data->digest));
- }
-
- (void)snprintf ((char *)output, o_size, "%s$", puresalt);
-
- free (puresalt);
-
- p = (char *)output + strlen ((const char *)output);
-
- l = (uint32_t)((data->digest[ 0]<<16) | (data->digest[ 6]<<8) | data->digest[12]);
- to64 (p, l, 4);
- p += 4;
- l = (uint32_t)((data->digest[ 1]<<16) | (data->digest[ 7]<<8) | data->digest[13]);
- to64 (p, l, 4);
- p += 4;
- l = (uint32_t)((data->digest[ 2]<<16) | (data->digest[ 8]<<8) | data->digest[14]);
- to64 (p, l, 4);
- p += 4;
- l = (uint32_t)((data->digest[ 3]<<16) | (data->digest[ 9]<<8) | data->digest[15]);
- to64 (p, l, 4);
- p += 4;
- l = (uint32_t)((data->digest[ 4]<<16) | (data->digest[10]<<8) | data->digest[ 5]);
- to64 (p, l, 4);
- p += 4;
- l = (uint32_t)data->digest[11];
- to64 (p, l, 2);
- p += 2;
- *p = '\0';
-}
diff --git a/crypt.c b/crypt.c
index d7f0ffcdd10ee0fa..8437d96834824d45 100644
--- a/crypt.c
+++ b/crypt.c
@@ -88,7 +88,6 @@ static const struct hashfn tagged_hashes[] =
#if ENABLE_WEAK_HASHES
{ "$1$", crypt_md5_rn, gensalt_md5_rn },
{ "$3$", crypt_nthash_rn, gensalt_nthash_rn },
- { "$md5", crypt_sunmd5_rn, gensalt_sunmd5_rn },
{ "$sha1", crypt_sha1_rn, gensalt_sha1_rn },
#endif
{ "$5$", crypt_sha256_rn, gensalt_sha256_rn },
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