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diff -up openssl-1.0.2k/ssl/ssl_cert.c.name-sensitive openssl-1.0.2k/ssl/ssl_cert.c
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--- openssl-1.0.2k/ssl/ssl_cert.c.name-sensitive 2017-01-26 14:22:04.000000000 +0100
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+++ openssl-1.0.2k/ssl/ssl_cert.c 2018-06-18 13:43:12.452502627 +0200
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@@ -855,9 +855,33 @@ int SSL_CTX_add_client_CA(SSL_CTX *ctx,
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return (add_client_CA(&(ctx->client_CA), x));
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}
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-static int xname_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
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+static int xname_cmp(const X509_NAME *a, const X509_NAME *b)
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{
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- return (X509_NAME_cmp(*a, *b));
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+ unsigned char *abuf = NULL, *bbuf = NULL;
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+ int alen, blen, ret;
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+
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+ /* X509_NAME_cmp() itself casts away constness in this way, so
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+ * assume it's safe:
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+ */
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+ alen = i2d_X509_NAME((X509_NAME *)a, &abuf);
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+ blen = i2d_X509_NAME((X509_NAME *)b, &bbuf);
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+
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+ if (alen < 0 || blen < 0)
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+ ret = -2;
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+ else if (alen != blen)
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+ ret = alen - blen;
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+ else /* alen == blen */
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+ ret = memcmp(abuf, bbuf, alen);
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+
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+ OPENSSL_free(abuf);
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+ OPENSSL_free(bbuf);
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+
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+ return ret;
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+}
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+
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+static int xname_sk_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
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+{
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+ return xname_cmp(*a, *b);
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}
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#ifndef OPENSSL_NO_STDIO
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@@ -876,7 +900,7 @@ STACK_OF(X509_NAME) *SSL_load_client_CA_
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X509_NAME *xn = NULL;
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STACK_OF(X509_NAME) *ret = NULL, *sk;
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- sk = sk_X509_NAME_new(xname_cmp);
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+ sk = sk_X509_NAME_new(xname_sk_cmp);
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in = BIO_new(BIO_s_file_internal());
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@@ -948,7 +972,7 @@ int SSL_add_file_cert_subjects_to_stack(
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int ret = 1;
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int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b);
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- oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_cmp);
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+ oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_sk_cmp);
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in = BIO_new(BIO_s_file_internal());
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