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#include |
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#include |
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#include |
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#include "houdini.h" |
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/** |
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* According to the OWASP rules: |
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* |
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* & --> & |
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* < --> < |
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* > --> > |
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* " --> " |
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* ' --> ' ' is not recommended |
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* / --> / forward slash is included as it helps end an HTML entity |
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* |
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*/ |
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static const char HTML_ESCAPE_TABLE[] = { |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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0, 0, 1, 0, 0, 0, 2, 3, 0, 0, 0, 0, 0, 0, 0, 4, |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 6, 0, |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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}; |
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static const char *HTML_ESCAPES[] = { |
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"", |
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""", |
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"&", |
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"'", |
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"/", |
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"<", |
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">" |
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}; |
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int |
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houdini_escape_html0(gh_buf *ob, const uint8_t *src, size_t size, int secure) |
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{ |
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size_t i = 0, org, esc = 0; |
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while (i < size) { |
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org = i; |
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while (i < size && (esc = HTML_ESCAPE_TABLE[src[i]]) == 0) |
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i++; |
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100
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if (i > org) { |
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if (unlikely(org == 0)) { |
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3
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if (i >= size) |
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return 0; |
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0
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gh_buf_grow(ob, HOUDINI_ESCAPED_SIZE(size)); |
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} |
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gh_buf_put(ob, src + org, i - org); |
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} |
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/* escaping */ |
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if (unlikely(i >= size)) |
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break; |
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/* The forward slash is only escaped in secure mode */ |
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if (src[i] == '/' && !secure) { |
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gh_buf_putc(ob, '/'); |
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} else { |
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gh_buf_puts(ob, HTML_ESCAPES[esc]); |
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} |
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i++; |
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} |
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return 1; |
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} |
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int |
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houdini_escape_html(gh_buf *ob, const uint8_t *src, size_t size) |
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{ |
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return houdini_escape_html0(ob, src, size, 1); |
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} |
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