Sample Public Key Blob

The following hex dump shows a sample public key blob, generated by the Microsoft RSA Base Provider. This contains a key exchange public key.

0x00000000 06 02 00 00 00 a4 00 00 ........

0x00000008 52 53 41 31 00 02 00 00 RSA1....

0x00000010 01 00 01 00 e1 94 84 7a .......z

0x00000018 27 4c 7b da db c5 99 dd 'L{.....

0x00000020 ed 20 1a b8 66 44 21 dc . ..fD!.

0x00000028 10 e5 ee 48 62 39 ae 8f ...Hb9..

0x00000030 cf 17 81 f0 37 8b b5 46 ....7..F

0x00000038 a9 65 b7 4e 75 83 84 4e .e.Nu..N

0x00000040 4f ce f1 f2 ad a0 b1 22 O......"

0x00000048 09 ec c2 30 96 f8 27 2b ...0..'+

0x00000050 33 cf a4 be 3...

Notice that the BLOBHEADER and RSAPUBKEY structures have been assigned the following values, and the last 64 bytes of the blob contain the public key's modulus data.

blobheader.bType = PUBLICKEYBLOB; // 0x06

blobheader.bVersion = CUR_BLOB_VERSION; // 0x02

blobheader.Reserved = 0; // 0x0000

blobheader.aiKeyAlg = CALG_RSA_KEYX; // 0x0000a400

rsapubkey.magic = 0x31415352; // "RSA1"

rsapubkey.bitlen = 512; // 0x00000200

rsapubkey.pubexp = 65537; // 0x00010001

When filling in the BLOBHEADER structure, your code should place zero in the Reserved field.

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