compat/apple-common-crypto.h

   1 /* suppress inclusion of conflicting openssl functions */
   2 #define OPENSSL_NO_MD5
   3 #define HEADER_HMAC_H
   4 #define HEADER_SHA_H
   5 #include <CommonCrypto/CommonHMAC.h>
   6 #define HMAC_CTX CCHmacContext
   7 #define HMAC_Init(hmac, key, len, algo) CCHmacInit(hmac, algo, key, len)
   8 #define HMAC_Update CCHmacUpdate
   9 #define HMAC_Final(hmac, hash, ptr) CCHmacFinal(hmac, hash)
  10 #define HMAC_CTX_cleanup(ignore)
  11 #define EVP_md5(...) kCCHmacAlgMD5
  12 #if __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
  13 #define APPLE_LION_OR_NEWER
  14 #include <Security/Security.h>
  15 /* Apple's TYPE_BOOL conflicts with config.c */
  16 #undef TYPE_BOOL
  17 #endif
  18
  19 #ifndef SHA1_MAX_BLOCK_SIZE
  20 #error Using Apple Common Crypto library requires setting SHA1_MAX_BLOCK_SIZE
  21 #endif
  22
  23 #ifdef APPLE_LION_OR_NEWER
  24 #define git_CC_error_check(pattern, err) \
  25         do { \
  26                 if (err) { \
  27                         die(pattern, (long)CFErrorGetCode(err)); \
  28                 } \
  29         } while(0)
  30
  31 #define EVP_EncodeBlock git_CC_EVP_EncodeBlock
  32 static inline int git_CC_EVP_EncodeBlock(unsigned char *out,
  33                 const unsigned char *in, int inlen)
  34 {
  35         CFErrorRef err;
  36         SecTransformRef encoder;
  37         CFDataRef input, output;
  38         CFIndex length;
  39
  40         encoder = SecEncodeTransformCreate(kSecBase64Encoding, &err);
  41         git_CC_error_check("SecEncodeTransformCreate failed: %ld", err);
  42
  43         input = CFDataCreate(kCFAllocatorDefault, in, inlen);
  44         SecTransformSetAttribute(encoder, kSecTransformInputAttributeName,
  45                         input, &err);
  46         git_CC_error_check("SecTransformSetAttribute failed: %ld", err);
  47
  48         output = SecTransformExecute(encoder, &err);
  49         git_CC_error_check("SecTransformExecute failed: %ld", err);
  50
  51         length = CFDataGetLength(output);
  52         CFDataGetBytes(output, CFRangeMake(0, length), out);
  53
  54         CFRelease(output);
  55         CFRelease(input);
  56         CFRelease(encoder);
  57
  58         return (int)strlen((const char *)out);
  59 }
  60
  61 #define EVP_DecodeBlock git_CC_EVP_DecodeBlock
  62 static int inline git_CC_EVP_DecodeBlock(unsigned char *out,
  63                 const unsigned char *in, int inlen)
  64 {
  65         CFErrorRef err;
  66         SecTransformRef decoder;
  67         CFDataRef input, output;
  68         CFIndex length;
  69
  70         decoder = SecDecodeTransformCreate(kSecBase64Encoding, &err);
  71         git_CC_error_check("SecEncodeTransformCreate failed: %ld", err);
  72
  73         input = CFDataCreate(kCFAllocatorDefault, in, inlen);
  74         SecTransformSetAttribute(decoder, kSecTransformInputAttributeName,
  75                         input, &err);
  76         git_CC_error_check("SecTransformSetAttribute failed: %ld", err);
  77
  78         output = SecTransformExecute(decoder, &err);
  79         git_CC_error_check("SecTransformExecute failed: %ld", err);
  80
  81         length = CFDataGetLength(output);
  82         CFDataGetBytes(output, CFRangeMake(0, length), out);
  83
  84         CFRelease(output);
  85         CFRelease(input);
  86         CFRelease(decoder);
  87
  88         return (int)strlen((const char *)out);
  89 }
  90 #endif /* APPLE_LION_OR_NEWER */