Hi, Shahin,
Thank you very much!
I will try to find the algorithm identifier and an exponent.
I just read raw data from DVD disk to verify the DVD data.
I try to use rsa_public_decrypt or rsa_verify. Both of them
need to use a RSA* format data. For now I only have the above
raw data as public key. Actually I really have no idea to
convert the raw data into RSA* format.
sincerely,
Hunter
On Wed, Feb 3, 2010 at 12:15 AM, Shahin Khorasani <khoras...@amnafzar.com>wrote:
> Hello hunter,
>
> Your raw data seems to be a RSA public key modulus.
> A public key in ASN.1 must have an algorithm identifier and an exponent.
> Take a look at this sample:
> raw data is (hexdump):
>
> 8230 2201 0d30 0906 862a 8648 0df7 0101
> 0501 0300 0182 000f 8230 0a01 8202 0101
> *d200 808c f87b cf63 7cb3 2cff 43dd 5cf5 * <--- You just provided
> this part
> *7def d1f5 adaa 0944 87ea f398 a654 b36d
> 2303 4d68 e9fa fd46 9171 0f97 2960 cd1e
> 6045 21aa 6986 44e2 679f 5a07 bbf9 157e
> 82e2 82a8 5f42 7cee 4af6 7c1a e53d 05a3
> cf9a fc6a a0d9 6850 64f1 a6af f6fe c61c
> f39f ba1e cb31 c734 5c2f 4937 5383 4de5
> 7b29 010a 2f86 41ab 00af 2ce3 3a48 3d19
> 41c2 3196 455d 219b d1a0 9600 a107 65a7
> f195 aacd a105 3c71 fc7f 9c58 5825 6bd7
> ffe7 8d47 6c3d de2a 2779 489f 2641 ed81
> 9f54 62e2 c4ed 893d e0bf 3678 a8c9 6573
> bda9 9b1f acb1 6634 9375 48bf ef82 887c
> 0e08 6b68 b6f3 8170 bda0 f8a7 2e1b 023d
> 5309 a755 e68e e014 cffd 9610 857a 3ffb
> f569 344c 7ea7 2520 d33f 0084 a9ca eaf6
> 028f *0103 0100
>
>
> Gutman ASN1 dumper output:
>
> 0 290: SEQUENCE {
> 4 13: SEQUENCE {
> 6 9: OBJECT IDENTIFIER rsaEncryption (1 2 840 113549 1 1 1)
> 17 0: NULL
> : }
> 19 271: BIT STRING, encapsulates {
> 24 266: SEQUENCE {
> 28 257: INTEGER
> : 00 D2 8C 80 7B F8 63 CF B3 7C FF 2C DD 43 F5 5C
> : EF 7D F5 D1 AA AD 44 09 EA 87 98 F3 54 A6 6D B3
> : 03 23 68 4D FA E9 46 FD 71 91 97 0F 60 29 1E CD
> : 45 60 AA 21 86 69 E2 44 9F 67 07 5A F9 BB 7E 15
> : E2 82 A8 82 42 5F EE 7C F6 4A 1A 7C 3D E5 A3 05
> : 9A CF 6A FC D9 A0 50 68 F1 64 AF A6 FE F6 1C C6
> : 9F F3 1E BA 31 CB 34 C7 2F 5C 37 49 83 53 E5 4D
> : 29 7B 0A 01 86 2F AB 41 AF 00 E3 2C 48 3A 19 3D
> : C2 41 96 31 5D 45 9B 21 A0 D1 00 96 07 A1 A7 65
> : 95 F1 CD AA 05 A1 71 3C 7F FC 58 9C 25 58 D7 6B
> : E7 FF 47 8D 3D 6C 2A DE 79 27 9F 48 41 26 81 ED
> : 54 9F E2 62 ED C4 3D 89 BF E0 78 36 C9 A8 73 65
> : A9 BD 1F 9B B1 AC 34 66 75 93 BF 48 82 EF 7C 88
> : 08 0E 68 6B F3 B6 70 81 A0 BD A7 F8 1B 2E 3D 02
> : 09 53 55 A7 8E E6 14 E0 FD CF 10 96 7A 85 FB 3F
> : 69 F5 4C 34 A7 7E 20 25 3F D3 84 00 CA A9 F6 EA
> : 8F
> 289 3: INTEGER 65537
> : }
> : }
> : }
>
> Regards,
> Shahin Khorasani
>
>
>
> hunter li wrote:
>
> Hi, All,
> I have the following code to generate the RSA data. But it always gives me
> error:
> 5049:error:0906D064:lib(9):func(109):reason(100):pem_lib.c:756.
>
> I do appreciate any suggestion!
>
>
> #include <stdio.h>
> #include <stdlib.h>
> #include <stdint.h>
> #include <string.h>
>
> #include <openssl/bio.h>
> #include <openssl/rsa.h>
> #include <openssl/pem.h>
> #include <openssl/err.h>
>
> int main(void)
> {
>
> RSA *public_key;
> BIO *pub_bio;
>
> char *publicKey_test = "-----BEGIN PUBLIC
> KEY-----\nOTJjM2I3NTJmMmZlMzhkOTZjOTI2MjIxNzc0NjllNzM\
> MWExMDk5MmZkNWY3MWE0N2JlMzRhMzcxMDZkZDNkMTk\
> ZTUzNDc4OTY4OWQzM2FlYWRjMmQ2NWEzNGM5NjdjYzg\
> ODQzMzNhNDI4YjEyODRjZmQ0ZGNkZjVjM2UyNDU5Njk\
> NzNmMDAyZGEyMjIxZGM3NGM3NjdhYzZkYWIzYjc1YmE\
> MzAwZmZlNzcxZmIzMGJhZTBhMzQ4OGUxYTBhYzU0MmI\
> N2EwOTVlZWIzMzg1MWMwZWM2N2YwNDMzMzE3MTdkOTU\
> ZjM2ZmFlM2NiMDI3MTdhMjQxNjc3YTRkNTI4ODNhZDM\
> MzQ3ODE1N2IzZDcwODk0YjVmYzI3MTI5NmU4MjViOTU\
> Y2Q1NTQ3M2ZlMWY5MzgzYmZjZTkzN2YyNmRhNjliOTY\
> OGE0MjA4YzBiOTU1NDAyNDM1ZTcwYjY0NDE1OTE2MmE\
> YjFmNmU4ODA5YTAwMWI2N2MwNDE4NzU3NWEwMGNkN2Q\
> OTU0YTcxNzkyZTJiZjlhYjcxOTk1NzdmYjc2NWI3YjQ\
> OWNmOGJmYjM3MGQxNDMxZGE3OGYwMTU4ODEwY2Y5OTI\
> MWUxMzAyMzUzNTFmNjUyMjU4NjkzNjM3MTU1YmUyMzU\
> NTQyYjhlYTIzMzI2NTE0ZTAzOGVlZjM4ZDVjZTBmNzc=\n-----END PUBLIC KEY-----";
>
> pub_bio = BIO_new_mem_buf(publicKey_test, -1);
> if(pub_bio == NULL) {
> ERR_print_errors_fp(stdout);
> return 1;
> }
>
> public_key = PEM_read_bio_RSA_PUBKEY(pub_bio, NULL, NULL, NULL);
> if(public_key == NULL) {
> ERR_print_errors_fp(stdout);
>
> }
> RSA_free(public_key);
>
> return 0;
>
> }
>
>
> Here I try to convert the following public key raw data into PEM format.
> I encode the data into base64 and add"-----BEGIN PUBLIC KEY-----", "----END
> PUBLIC KEY-----".
> The raw data is as following 256 Bytes:
> 92 c3 b7 52 f2 fe 38 d9 6c 92 62 21 77 46 9e 73
> 1a 10 99 2f d5 f7 1a 47 be 34 a3 71 06 dd 3d 19
> e5 34 78 96 89 d3 3a ea dc 2d 65 a3 4c 96 7c c8
> 84 33 3a 42 8b 12 84 cf d4 dc df 5c 3e 24 59 69
> 73 f0 02 da 22 21 dc 74 c7 67 ac 6d ab 3b 75 ba
> 30 0f fe 77 1f b3 0b ae 0a 34 88 e1 a0 ac 54 2b
> 7a 09 5e eb 33 85 1c 0e c6 7f 04 33 31 71 7d 95
> f3 6f ae 3c b0 27 17 a2 41 67 7a 4d 52 88 3a d3
> 34 78 15 7b 3d 70 89 4b 5f c2 71 29 6e 82 5b 95
> cd 55 47 3f e1 f9 38 3b fc e9 37 f2 6d a6 9b 96
> 8a 42 08 c0 b9 55 40 24 35 e7 0b 64 41 59 16 2a
> b1 f6 e8 80 9a 00 1b 67 c0 41 87 57 5a 00 cd 7d
> 95 4a 71 79 2e 2b f9 ab 71 99 57 7f b7 65 b7 b4
> 9c f8 bf b3 70 d1 43 1d a7 8f 01 58 81 0c f9 92
> 1e 13 02 35 35 1f 65 22 58 69 36 37 15 5b e2 35
> 54 2b 8e a2 33 26 51 4e 03 8e ef 38 d5 ce 0f 77
>
>
> Thank you in advance!
>
> Hunter
>
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