mirror of
https://github.com/norandom/OpenUltraSAST.git
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56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
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/* Provenance: openssl/openssl validate_hostname_part (fixed).
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* repo: openssl/openssl
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* commit: b3a555a0a7aa0028887149f6f973af89a4937bea
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* parent: 0f3fab2eccc7c3417093a8243dd15d95b6cb472d
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* commit_url: https://github.com/openssl/openssl/commit/b3a555a0a7aa0028887149f6f973af89a4937bea
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* cve: CVE-2026-42771
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* license: Apache-2.0
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* function: validate_hostname_part
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* relpath: crypto/x509/x509_vpm.c
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*/
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static int validate_hostname_part(const char *name, size_t len,
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ossl_charset_t charset)
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{
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size_t i, part_len;
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char c, prev;
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if (len < 2 || len > 256)
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return 0;
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part_len = 0;
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prev = '\0';
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for (i = 0; i < len; i++) {
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c = name[i];
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if (c == '.') {
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/*
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* Can not start a label with a .
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* unless it is the very first character.
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*/
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if (part_len == 0 && i != 0)
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return 0;
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/* Can not end a label with a - */
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if (prev == '-')
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return 0;
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part_len = 0;
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} else {
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/* Can not start a label with a - */
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if (part_len == 0 && c == '-') {
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return 0;
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}
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if (!is_label_ok(c, charset) && c != '-')
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return 0;
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part_len++;
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}
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if (part_len > 63)
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return 0;
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prev = c;
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}
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/* Can not end with a . or a _ */
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if (prev == '.' || prev == '-')
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return 0;
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return 1;
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}
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