63 lines
1.8 KiB
Plaintext
63 lines
1.8 KiB
Plaintext
If you want to use the RSA stuff for crypto keys:
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- Get RSAREF or RSAEURO (or a reasonable facsimile thereof)
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- - Unpack it in the top-level source directory of the NTP distribution
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in a directory named rsaref2
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(You should see directories like ports, rsaref2, scripts)
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Make sure rsa.c has the security patch applied - a copy of it is at the
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end of this file.
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When you run configure, the Right Thing will happen.
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Be advised that the RSA DES code is not quite as portable os one might
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wish for. In particular, DES under NTP will only work between machines
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of the same "endianness".
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Dave would prefer that new/alternative encryption schemes follow the
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RSA API.
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--- rsa.c.orig Fri Mar 25 14:01:48 1994
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+++ rsaref2/source/rsa.c Mon Dec 13 13:10:28 1999
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@@ -33,6 +33,9 @@
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unsigned char byte, pkcsBlock[MAX_RSA_MODULUS_LEN];
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unsigned int i, modulusLen;
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+ if (publicKey->bits > MAX_RSA_MODULUS_BITS)
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+ return (RE_LEN);
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+
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modulusLen = (publicKey->bits + 7) / 8;
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if (inputLen + 11 > modulusLen)
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return (RE_LEN);
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@@ -78,6 +81,9 @@
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unsigned char pkcsBlock[MAX_RSA_MODULUS_LEN];
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unsigned int i, modulusLen, pkcsBlockLen;
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+ if (publicKey->bits > MAX_RSA_MODULUS_BITS)
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+ return (RE_LEN);
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+
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modulusLen = (publicKey->bits + 7) / 8;
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if (inputLen > modulusLen)
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return (RE_LEN);
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@@ -128,6 +134,9 @@
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int status;
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unsigned char pkcsBlock[MAX_RSA_MODULUS_LEN];
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unsigned int i, modulusLen;
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+
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+ if (privateKey->bits > MAX_RSA_MODULUS_BITS)
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+ return (RE_LEN);
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modulusLen = (privateKey->bits + 7) / 8;
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if (inputLen + 11 > modulusLen)
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@@ -168,6 +177,9 @@
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unsigned char pkcsBlock[MAX_RSA_MODULUS_LEN];
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unsigned int i, modulusLen, pkcsBlockLen;
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+ if (privateKey->bits > MAX_RSA_MODULUS_BITS)
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+ return (RE_LEN);
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+
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modulusLen = (privateKey->bits + 7) / 8;
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if (inputLen > modulusLen)
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return (RE_LEN);
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