diff options
Diffstat (limited to 'src/cmsio0.c')
| -rw-r--r-- | src/cmsio0.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/src/cmsio0.c b/src/cmsio0.c index 4449acd..40f55d1 100644 --- a/src/cmsio0.c +++ b/src/cmsio0.c @@ -623,6 +623,32 @@ cmsBool CMSEXPORT cmsIsTag(cmsHPROFILE hProfile, cmsTagSignature sig) } + +// Enforces that the profile version is per. spec. +// Operates on the big endian bytes from the profile. +// Called before converting to platform endianness. +// Byte 0 is BCD major version, so max 9. +// Byte 1 is 2 BCD digits, one per nibble. +// Reserved bytes 2 & 3 must be 0. +static +cmsUInt32Number _validatedVersion(cmsUInt32Number DWord) +{ + cmsUInt8Number* pByte = (cmsUInt8Number*) &DWord; + cmsUInt8Number temp1; + cmsUInt8Number temp2; + + if (*pByte > 0x09) *pByte = (cmsUInt8Number) 0x09; + temp1 = *(pByte+1) & 0xf0; + temp2 = *(pByte+1) & 0x0f; + if (temp1 > 0x90) temp1 = 0x90; + if (temp2 > 0x09) temp2 = 0x09; + *(pByte+1) = (cmsUInt8Number)(temp1 | temp2); + *(pByte+2) = (cmsUInt8Number)0; + *(pByte+3) = (cmsUInt8Number)0; + + return DWord; +} + // Read profile header and validate it cmsBool _cmsReadHeader(_cmsICCPROFILE* Icc) { @@ -657,7 +683,7 @@ cmsBool _cmsReadHeader(_cmsICCPROFILE* Icc) Icc -> creator = _cmsAdjustEndianess32(Header.creator); _cmsAdjustEndianess64(&Icc -> attributes, &Header.attributes); - Icc -> Version = _cmsAdjustEndianess32(Header.version); + Icc -> Version = _cmsAdjustEndianess32(_validatedVersion(Header.version)); // Get size as reported in header HeaderSize = _cmsAdjustEndianess32(Header.size); |