- add upstream patches for KDC crash during AES and RC4 decryption
(CVE-2009-4212), via Tom Yu (#545015)
This commit is contained in:
Nalin Dahyabhai
parent
3ad86e219a
commit
c81c7789b7
377
2009-004-patch_1.7.txt
Normal file
377
2009-004-patch_1.7.txt
Normal file
@ -0,0 +1,377 @@
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Index: src/lib/crypto/Makefile.in
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===================================================================
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--- src/lib/crypto/Makefile.in (revision 23398)
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+++ src/lib/crypto/Makefile.in (working copy)
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@@ -18,6 +18,7 @@
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$(srcdir)/t_nfold.c \
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$(srcdir)/t_cf2.c \
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$(srcdir)/t_encrypt.c \
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+ $(srcdir)/t_short.c \
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$(srcdir)/t_prf.c \
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$(srcdir)/t_prng.c \
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$(srcdir)/t_hmac.c \
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@@ -206,7 +207,7 @@
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clean-unix:: clean-liblinks clean-libs clean-libobjs
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-check-unix:: t_nfold t_encrypt t_prf t_prng t_hmac t_pkcs5 t_cf2
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+check-unix:: t_nfold t_encrypt t_prf t_prng t_hmac t_pkcs5 t_cf2 t_short
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$(RUN_SETUP) $(VALGRIND) ./t_nfold
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$(RUN_SETUP) $(VALGRIND) ./t_encrypt
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$(RUN_SETUP) $(VALGRIND) ./t_prng <$(srcdir)/t_prng.seed >t_prng.output && \
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@@ -216,6 +217,7 @@
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diff t_prf.output $(srcdir)/t_prf.expected
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$(RUN_SETUP) $(VALGRIND) ./t_cf2 <$(srcdir)/t_cf2.in >t_cf2.output
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diff t_cf2.output $(srcdir)/t_cf2.expected
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+ $(RUN_SETUP) $(VALGRIND) ./t_short
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# $(RUN_SETUP) $(VALGRIND) ./t_pkcs5
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@@ -249,10 +251,15 @@
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$(CC_LINK) -o $@ t_cts.$(OBJEXT) \
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$(K5CRYPTO_LIB) $(COM_ERR_LIB) $(SUPPORT_LIB)
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+t_short$(EXEEXT): t_short.$(OBJEXT) $(CRYPTO_DEPLIB) $(SUPPORT_DEPLIB)
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+ $(CC_LINK) -o $@ t_short.$(OBJEXT) \
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+ $(K5CRYPTO_LIB) $(COM_ERR_LIB) $(SUPPORT_LIB)
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+
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clean::
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$(RM) t_nfold.o t_nfold t_encrypt t_encrypt.o t_prng.o t_prng \
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- t_hmac.o t_hmac t_pkcs5.o t_pkcs5 pbkdf2.o t_prf t_prf.o t_cf2 t_cf2.o
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+ t_hmac.o t_hmac t_pkcs5.o t_pkcs5 pbkdf2.o t_prf t_prf.o \
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+ t_cf2 t_cf2.o t_short t_short.o
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-$(RM) t_prng.output
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all-windows::
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Index: src/lib/crypto/arcfour/arcfour.c
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===================================================================
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--- src/lib/crypto/arcfour/arcfour.c (revision 23398)
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+++ src/lib/crypto/arcfour/arcfour.c (working copy)
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@@ -199,6 +199,12 @@
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keylength = enc->keylength;
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hashsize = hash->hashsize;
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+ /* Verify input and output lengths. */
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+ if (input->length < hashsize + CONFOUNDERLENGTH)
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+ return KRB5_BAD_MSIZE;
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+ if (output->length < input->length - hashsize - CONFOUNDERLENGTH)
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+ return KRB5_BAD_MSIZE;
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+
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d1.length=keybytes;
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d1.data=malloc(d1.length);
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if (d1.data == NULL)
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Index: src/lib/crypto/enc_provider/aes.c
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===================================================================
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--- src/lib/crypto/enc_provider/aes.c (revision 23398)
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+++ src/lib/crypto/enc_provider/aes.c (working copy)
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@@ -105,9 +105,11 @@
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nblocks = (input->length + BLOCK_SIZE - 1) / BLOCK_SIZE;
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if (nblocks == 1) {
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- /* XXX Used for DK function. */
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+ /* Used when deriving keys. */
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+ if (input->length < BLOCK_SIZE)
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+ return KRB5_BAD_MSIZE;
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enc(output->data, input->data, &ctx);
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- } else {
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+ } else if (nblocks > 1) {
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unsigned int nleft;
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for (blockno = 0; blockno < nblocks - 2; blockno++) {
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@@ -160,9 +162,9 @@
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if (nblocks == 1) {
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if (input->length < BLOCK_SIZE)
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- abort();
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+ return KRB5_BAD_MSIZE;
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dec(output->data, input->data, &ctx);
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- } else {
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+ } else if (nblocks > 1) {
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for (blockno = 0; blockno < nblocks - 2; blockno++) {
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dec(tmp2, input->data + blockno * BLOCK_SIZE, &ctx);
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@@ -208,6 +210,7 @@
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char tmp[BLOCK_SIZE], tmp2[BLOCK_SIZE];
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int nblocks = 0, blockno;
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size_t input_length, i;
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+ struct iov_block_state input_pos, output_pos;
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if (aes_enc_key(key->contents, key->length, &ctx) != aes_good)
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abort();
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@@ -224,18 +227,20 @@
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input_length += iov->data.length;
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}
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+ IOV_BLOCK_STATE_INIT(&input_pos);
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+ IOV_BLOCK_STATE_INIT(&output_pos);
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+
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nblocks = (input_length + BLOCK_SIZE - 1) / BLOCK_SIZE;
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-
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- assert(nblocks > 1);
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-
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- {
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+ if (nblocks == 1) {
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+ krb5int_c_iov_get_block((unsigned char *)tmp, BLOCK_SIZE,
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+ data, num_data, &input_pos);
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+ enc(tmp2, tmp, &ctx);
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+ krb5int_c_iov_put_block(data, num_data, (unsigned char *)tmp2,
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+ BLOCK_SIZE, &output_pos);
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+ } else if (nblocks > 1) {
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char blockN2[BLOCK_SIZE]; /* second last */
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char blockN1[BLOCK_SIZE]; /* last block */
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- struct iov_block_state input_pos, output_pos;
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- IOV_BLOCK_STATE_INIT(&input_pos);
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- IOV_BLOCK_STATE_INIT(&output_pos);
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-
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for (blockno = 0; blockno < nblocks - 2; blockno++) {
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char blockN[BLOCK_SIZE];
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@@ -288,6 +293,7 @@
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char tmp[BLOCK_SIZE], tmp2[BLOCK_SIZE], tmp3[BLOCK_SIZE];
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int nblocks = 0, blockno, i;
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size_t input_length;
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+ struct iov_block_state input_pos, output_pos;
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CHECK_SIZES;
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@@ -306,18 +312,20 @@
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input_length += iov->data.length;
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}
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+ IOV_BLOCK_STATE_INIT(&input_pos);
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+ IOV_BLOCK_STATE_INIT(&output_pos);
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+
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nblocks = (input_length + BLOCK_SIZE - 1) / BLOCK_SIZE;
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-
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- assert(nblocks > 1);
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-
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- {
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+ if (nblocks == 1) {
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+ krb5int_c_iov_get_block((unsigned char *)tmp, BLOCK_SIZE,
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+ data, num_data, &input_pos);
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+ dec(tmp2, tmp, &ctx);
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+ krb5int_c_iov_put_block(data, num_data, (unsigned char *)tmp2,
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+ BLOCK_SIZE, &output_pos);
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+ } else if (nblocks > 1) {
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char blockN2[BLOCK_SIZE]; /* second last */
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char blockN1[BLOCK_SIZE]; /* last block */
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- struct iov_block_state input_pos, output_pos;
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- IOV_BLOCK_STATE_INIT(&input_pos);
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- IOV_BLOCK_STATE_INIT(&output_pos);
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-
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for (blockno = 0; blockno < nblocks - 2; blockno++) {
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char blockN[BLOCK_SIZE];
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Index: src/lib/crypto/dk/dk_aead.c
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===================================================================
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--- src/lib/crypto/dk/dk_aead.c (revision 23398)
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+++ src/lib/crypto/dk/dk_aead.c (working copy)
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@@ -248,7 +248,7 @@
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for (i = 0; i < num_data; i++) {
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const krb5_crypto_iov *iov = &data[i];
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- if (ENCRYPT_DATA_IOV(iov))
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+ if (ENCRYPT_IOV(iov))
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cipherlen += iov->data.length;
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}
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Index: src/lib/crypto/dk/dk_decrypt.c
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===================================================================
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--- src/lib/crypto/dk/dk_decrypt.c (revision 23398)
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+++ src/lib/crypto/dk/dk_decrypt.c (working copy)
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@@ -89,6 +89,12 @@
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else if (hmacsize > hashsize)
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return KRB5KRB_AP_ERR_BAD_INTEGRITY;
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+ /* Verify input and output lengths. */
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+ if (input->length < blocksize + hmacsize)
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+ return KRB5_BAD_MSIZE;
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+ if (output->length < input->length - blocksize - hmacsize)
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+ return KRB5_BAD_MSIZE;
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+
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enclen = input->length - hmacsize;
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if ((kedata = (unsigned char *) malloc(keylength)) == NULL)
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Index: src/lib/crypto/raw/raw_decrypt.c
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===================================================================
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--- src/lib/crypto/raw/raw_decrypt.c (revision 23398)
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+++ src/lib/crypto/raw/raw_decrypt.c (working copy)
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@@ -34,5 +34,7 @@
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const krb5_data *ivec, const krb5_data *input,
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krb5_data *output)
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{
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+ if (output->length < input->length)
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+ return KRB5_BAD_MSIZE;
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return((*(enc->decrypt))(key, ivec, input, output));
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}
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Index: src/lib/crypto/deps
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===================================================================
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--- src/lib/crypto/deps (revision 23398)
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+++ src/lib/crypto/deps (working copy)
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@@ -463,6 +463,16 @@
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$(SRCTOP)/include/krb5.h $(SRCTOP)/include/krb5/locate_plugin.h \
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$(SRCTOP)/include/krb5/preauth_plugin.h $(SRCTOP)/include/port-sockets.h \
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$(SRCTOP)/include/socket-utils.h etypes.h t_encrypt.c
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+t_short.so t_short.po $(OUTPRE)t_short.$(OBJEXT): $(BUILDTOP)/include/autoconf.h \
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+ $(BUILDTOP)/include/krb5/krb5.h $(BUILDTOP)/include/osconf.h \
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+ $(BUILDTOP)/include/profile.h $(COM_ERR_DEPS) $(SRCTOP)/include/k5-buf.h \
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+ $(SRCTOP)/include/k5-err.h $(SRCTOP)/include/k5-gmt_mktime.h \
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+ $(SRCTOP)/include/k5-int-pkinit.h $(SRCTOP)/include/k5-int.h \
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+ $(SRCTOP)/include/k5-platform.h $(SRCTOP)/include/k5-plugin.h \
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+ $(SRCTOP)/include/k5-thread.h $(SRCTOP)/include/krb5.h \
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+ $(SRCTOP)/include/krb5/locate_plugin.h $(SRCTOP)/include/krb5/preauth_plugin.h \
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+ $(SRCTOP)/include/port-sockets.h $(SRCTOP)/include/socket-utils.h \
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+ t_short.c
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t_prf.so t_prf.po $(OUTPRE)t_prf.$(OBJEXT): $(BUILDTOP)/include/autoconf.h \
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$(BUILDTOP)/include/krb5/krb5.h $(BUILDTOP)/include/osconf.h \
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$(BUILDTOP)/include/profile.h $(COM_ERR_DEPS) $(SRCTOP)/include/k5-buf.h \
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Index: src/lib/crypto/t_short.c
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===================================================================
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--- src/lib/crypto/t_short.c (revision 0)
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+++ src/lib/crypto/t_short.c (revision 0)
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@@ -0,0 +1,126 @@
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+/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
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+/*
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+ * lib/crypto/crypto_tests/t_short.c
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+ *
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+ * Copyright (C) 2009 by the Massachusetts Institute of Technology.
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+ * All rights reserved.
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+ *
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+ * Export of this software from the United States of America may
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+ * require a specific license from the United States Government.
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+ * It is the responsibility of any person or organization contemplating
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+ * export to obtain such a license before exporting.
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+ *
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+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
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+ * distribute this software and its documentation for any purpose and
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+ * without fee is hereby granted, provided that the above copyright
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+ * notice appear in all copies and that both that copyright notice and
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+ * this permission notice appear in supporting documentation, and that
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+ * the name of M.I.T. not be used in advertising or publicity pertaining
|
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+ * to distribution of the software without specific, written prior
|
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+ * permission. Furthermore if you modify this software you must label
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+ * your software as modified software and not distribute it in such a
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+ * fashion that it might be confused with the original M.I.T. software.
|
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+ * M.I.T. makes no representations about the suitability of
|
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+ * this software for any purpose. It is provided "as is" without express
|
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+ * or implied warranty.
|
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+ *
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+ * Tests the outcome of decrypting overly short tokens. This program can be
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+ * run under a tool like valgrind to detect bad memory accesses; when run
|
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+ * normally by the test suite, it verifies that each operation returns
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+ * KRB5_BAD_MSIZE.
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+ */
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+
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+#include "k5-int.h"
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+
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+krb5_enctype interesting_enctypes[] = {
|
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+ ENCTYPE_DES_CBC_CRC,
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+ ENCTYPE_DES_CBC_MD4,
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+ ENCTYPE_DES_CBC_MD5,
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+ ENCTYPE_DES3_CBC_SHA1,
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+ ENCTYPE_ARCFOUR_HMAC,
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+ ENCTYPE_ARCFOUR_HMAC_EXP,
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+ ENCTYPE_AES256_CTS_HMAC_SHA1_96,
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+ ENCTYPE_AES128_CTS_HMAC_SHA1_96,
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+ 0
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|
+};
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+
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|
+/* Abort if an operation unexpectedly fails. */
|
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|
+static void
|
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+x(krb5_error_code code)
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+{
|
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|
+ if (code != 0)
|
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|
+ abort();
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|
+}
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+
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+/* Abort if a decrypt operation doesn't have the expected result. */
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+static void
|
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|
+check_decrypt_result(krb5_error_code code, size_t len, size_t min_len)
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+{
|
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|
+ if (len < min_len) {
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|
+ /* Undersized tokens should always result in BAD_MSIZE. */
|
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|
+ if (code != KRB5_BAD_MSIZE)
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|
+ abort();
|
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|
+ } else {
|
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|
+ /* Min-size tokens should succeed or fail the integrity check. */
|
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|
+ if (code != 0 && code != KRB5KRB_AP_ERR_BAD_INTEGRITY)
|
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|
+ abort();
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|
+ }
|
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|
+}
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+
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|
+static void
|
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+test_enctype(krb5_enctype enctype)
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+{
|
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+ krb5_error_code ret;
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+ krb5_keyblock keyblock;
|
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+ krb5_enc_data input;
|
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+ krb5_data output;
|
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+ krb5_crypto_iov iov[2];
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+ unsigned int dummy;
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+ size_t min_len, len;
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+
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|
+ printf("Testing enctype %d\n", (int) enctype);
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+ x(krb5_c_encrypt_length(NULL, enctype, 0, &min_len));
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+ x(krb5_c_make_random_key(NULL, enctype, &keyblock));
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+ input.enctype = enctype;
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|
+
|
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|
+ /* Try each length up to the minimum length. */
|
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|
+ for (len = 0; len <= min_len; len++) {
|
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|
+ input.ciphertext.data = calloc(len, 1);
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+ input.ciphertext.length = len;
|
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|
+ output.data = calloc(len, 1);
|
||||||
|
+ output.length = len;
|
||||||
|
+
|
||||||
|
+ /* Attempt a normal decryption. */
|
||||||
|
+ ret = krb5_c_decrypt(NULL, &keyblock, 0, NULL, &input, &output);
|
||||||
|
+ check_decrypt_result(ret, len, min_len);
|
||||||
|
+
|
||||||
|
+ if (krb5_c_crypto_length(NULL, enctype, KRB5_CRYPTO_TYPE_HEADER,
|
||||||
|
+ &dummy) == 0) {
|
||||||
|
+ /* Attempt an IOV stream decryption. */
|
||||||
|
+ iov[0].flags = KRB5_CRYPTO_TYPE_STREAM;
|
||||||
|
+ iov[0].data = input.ciphertext;
|
||||||
|
+ iov[1].flags = KRB5_CRYPTO_TYPE_DATA;
|
||||||
|
+ iov[1].data.data = NULL;
|
||||||
|
+ iov[1].data.length = 0;
|
||||||
|
+ ret = krb5_c_decrypt_iov(NULL, &keyblock, 0, NULL, iov, 2);
|
||||||
|
+ check_decrypt_result(ret, len, min_len);
|
||||||
|
+ }
|
||||||
|
+
|
||||||
|
+ free(input.ciphertext.data);
|
||||||
|
+ free(output.data);
|
||||||
|
+ }
|
||||||
|
+}
|
||||||
|
+
|
||||||
|
+int
|
||||||
|
+main(int argc, char **argv)
|
||||||
|
+{
|
||||||
|
+ int i;
|
||||||
|
+ krb5_data notrandom;
|
||||||
|
+
|
||||||
|
+ notrandom.data = "notrandom";
|
||||||
|
+ notrandom.length = 9;
|
||||||
|
+ krb5_c_random_seed(NULL, ¬random);
|
||||||
|
+ for (i = 0; interesting_enctypes[i]; i++)
|
||||||
|
+ test_enctype(interesting_enctypes[i]);
|
||||||
|
+ return 0;
|
||||||
|
+}
|
||||||
|
Index: src/lib/crypto/old/old_decrypt.c
|
||||||
|
===================================================================
|
||||||
|
--- src/lib/crypto/old/old_decrypt.c (revision 23398)
|
||||||
|
+++ src/lib/crypto/old/old_decrypt.c (working copy)
|
||||||
|
@@ -45,8 +45,10 @@
|
||||||
|
blocksize = enc->block_size;
|
||||||
|
hashsize = hash->hashsize;
|
||||||
|
|
||||||
|
+ /* Verify input and output lengths. */
|
||||||
|
+ if (input->length < blocksize + hashsize || input->length % blocksize != 0)
|
||||||
|
+ return(KRB5_BAD_MSIZE);
|
||||||
|
plainsize = input->length - blocksize - hashsize;
|
||||||
|
-
|
||||||
|
if (arg_output->length < plainsize)
|
||||||
|
return(KRB5_BAD_MSIZE);
|
||||||
|
|
||||||
@ -10,7 +10,7 @@
|
|||||||
Summary: The Kerberos network authentication system
|
Summary: The Kerberos network authentication system
|
||||||
Name: krb5
|
Name: krb5
|
||||||
Version: 1.7
|
Version: 1.7
|
||||||
Release: 17%{?dist}
|
Release: 18%{?dist}
|
||||||
# Maybe we should explode from the now-available-to-everybody tarball instead?
|
# Maybe we should explode from the now-available-to-everybody tarball instead?
|
||||||
# http://web.mit.edu/kerberos/dist/krb5/1.7/krb5-1.7-signed.tar
|
# http://web.mit.edu/kerberos/dist/krb5/1.7/krb5-1.7-signed.tar
|
||||||
Source0: krb5-%{version}.tar.gz
|
Source0: krb5-%{version}.tar.gz
|
||||||
@ -82,6 +82,7 @@ Patch90: krb5-1.7-openssl-1.0.patch
|
|||||||
Patch91: krb5-1.7-spnego-deleg.patch
|
Patch91: krb5-1.7-spnego-deleg.patch
|
||||||
Patch92: http://web.mit.edu/kerberos/advisories/2009-003-patch.txt
|
Patch92: http://web.mit.edu/kerberos/advisories/2009-003-patch.txt
|
||||||
Patch93: krb5-1.7-create_on_load.patch
|
Patch93: krb5-1.7-create_on_load.patch
|
||||||
|
Patch94: http://web.mit.edu/kerberos/advisories/2009-004-patch_1.7.txt
|
||||||
|
|
||||||
License: MIT
|
License: MIT
|
||||||
URL: http://web.mit.edu/kerberos/www/
|
URL: http://web.mit.edu/kerberos/www/
|
||||||
@ -218,6 +219,10 @@ to obtain initial credentials from a KDC using a private key and a
|
|||||||
certificate.
|
certificate.
|
||||||
|
|
||||||
%changelog
|
%changelog
|
||||||
|
* Tue Jan 12 2010 Nalin Dahyabhai <nalin@redhat.com> - 1.7-18
|
||||||
|
- add upstream patch for KDC crash during AES and RC4 decryption
|
||||||
|
(CVE-2009-4212), via Tom Yu (#545015)
|
||||||
|
|
||||||
* Wed Jan 6 2010 Nalin Dahyabhai <nalin@redhat.com> - 1.7-17
|
* Wed Jan 6 2010 Nalin Dahyabhai <nalin@redhat.com> - 1.7-17
|
||||||
- put the conditional back for the -devel subpackage
|
- put the conditional back for the -devel subpackage
|
||||||
- back down to the earlier version of the patch for #551764; the backported
|
- back down to the earlier version of the patch for #551764; the backported
|
||||||
@ -1541,6 +1546,7 @@ popd
|
|||||||
%patch91 -p0 -b .spnego-deleg
|
%patch91 -p0 -b .spnego-deleg
|
||||||
%patch92 -p1 -b .2009-003
|
%patch92 -p1 -b .2009-003
|
||||||
%patch93 -p1 -b .create_on_load
|
%patch93 -p1 -b .create_on_load
|
||||||
|
%patch94 -p0 -b .2009-004
|
||||||
gzip doc/*.ps
|
gzip doc/*.ps
|
||||||
|
|
||||||
sed -i -e '1s!\[twoside\]!!;s!%\(\\usepackage{hyperref}\)!\1!' doc/api/library.tex
|
sed -i -e '1s!\[twoside\]!!;s!%\(\\usepackage{hyperref}\)!\1!' doc/api/library.tex
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user