SEI CERT C Coding Standard

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Search for vulnerabilities resulting from the violation of this rule on the CERT website.

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This rule appears in the C++ Secure Coding Standard as STR34-CPP. Cast characters to unsigned types before converting to larger integer sizes.

References

Wiki Markup
\[[ISO/IEC 9899:1999|AA. C References#ISO/IEC 9899-1999]\] Section 6.2.5, "Types"
\[[MISRA 04|AA. C References#MISRA 04]\] Rule 6.1, "The plain char type shall be used only for the storage and use of character values."
\[[MITRE 07|AA. C References#MITRE 07]\] [CWE ID 704|http://cwe.mitre.org/data/definitions/704.html], "Incorrect Type Conversion or Cast"

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