diff options
Diffstat (limited to 'src/print_c_code.c')
| -rw-r--r-- | src/print_c_code.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/src/print_c_code.c b/src/print_c_code.c new file mode 100644 index 0000000..bf6aeb5 --- /dev/null +++ b/src/print_c_code.c @@ -0,0 +1,171 @@ +/* print_c_code.c - Output the C code that used to be provided in openssl dhparam -C + * Reads full output from openssl in stdin, prints C code to stdout. + * + * Sample output from openssl 3: + +[root@localhost nrpe]# openssl dhparam -text 2048 +Generating DH parameters, 2048 bit long safe prime +................................................................................ ................................................................................ ..............................................................+.......+......... .................................................+.............................. ................................................................................ ................................................................................ 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............................................................+................... ..............+........................................................+........ ...................................................+............................ .+..............+.................+...........................................+. ................................................................................ ......................................................+......................... ................................................................................ ................................................................................ ......+................................................................+........ ...............................................+..............+................. ....................................+..............................+............ ................................................................................ .........................................+............................+......... ................................................................................ .............................................................+.................. .............................................+.................................. .......++*++*++*++*++*++*++*++*++*++*++*++*++*++*++*++*++*++*++*++*++*++*++*++*+ +*++*++*++*++*++*++*++*++*++*++*++*++*++*++*++*++*++*++*++*++*++*++*++*++*++*++* ++*++*++*++*++*++*++*++*++*++*++*++*++* + DH Parameters: (2048 bit) + P: + 00:d4:81:57:06:2e:dc:2c:c0:0e:7f:20:5c:07:6a: + 22:06:b5:fc:f1:83:bb:99:31:38:03:a7:ef:98:b6: + 75:32:33:e2:55:08:d4:46:a3:f1:94:85:de:da:2f: + e7:49:8d:69:f8:28:73:57:7a:58:99:61:f5:37:76: + f0:45:68:9e:cc:67:77:b4:4d:08:ec:3b:71:a2:62: + e6:26:d8:2c:2d:61:1e:45:20:5b:1b:bc:19:de:ee: + 99:a0:c5:ad:2a:59:bf:e8:26:95:56:71:0e:f0:d8: + 3b:3b:6d:91:5a:c8:f4:3d:1a:02:75:76:42:cf:63: + c7:3c:07:3b:0c:c0:98:e9:a9:ab:bc:d6:a3:a1:cb: + 85:79:ff:37:3c:f8:3a:a0:84:b3:a7:68:cd:3d:f4: + a6:d8:c7:7b:d5:f4:11:33:8f:ba:2c:67:15:65:38: + 23:10:67:2d:fc:4c:c0:bc:b5:43:70:67:86:b9:83: + 5a:42:a7:18:11:7f:32:4c:3d:e2:08:2f:0d:59:ae: + 1f:8c:73:72:16:00:d3:e1:e7:38:a3:24:b5:e0:25: + 0e:c2:41:b8:09:82:8d:05:c8:9c:61:d8:61:f5:19: + 93:f7:b1:02:44:20:bc:7e:2f:3f:e0:c8:d2:5a:50: + cc:7f:b5:96:8b:83:b7:5b:03:8a:52:a1:69:4e:b4: + 8a:5f + G: 2 (0x2) +-----BEGIN DH PARAMETERS----- +MIIBCAKCAQEA1IFXBi7cLMAOfyBcB2oiBrX88YO7mTE4A6fvmLZ1MjPiVQjURqPx +lIXe2i/nSY1p+ChzV3pYmWH1N3bwRWiezGd3tE0I7DtxomLmJtgsLWEeRSBbG7wZ +3u6ZoMWtKlm/6CaVVnEO8Ng7O22RWsj0PRoCdXZCz2PHPAc7DMCY6amrvNajocuF +ef83PPg6oISzp2jNPfSm2Md71fQRM4+6LGcVZTgjEGct/EzAvLVDcGeGuYNaQqcY +EX8yTD3iCC8NWa4fjHNyFgDT4ec4oyS14CUOwkG4CYKNBcicYdhh9RmT97ECRCC8 +fi8/4MjSWlDMf7WWi4O3WwOKUqFpTrSKXwIBAg== +-----END DH PARAMETERS----- +[root@localhost nrpe]# + + ********* + * Correct C output will look like + +#ifndef HEADER_DH_H +#include <openssl/dh.h> +#endif +DH *get_dh2048() + { + static unsigned char dh2048_p[]={ + 0x84,0xC5,0x67,0x9B,0x9E,0xAD,0x8C,0x80,0xAF,0x35,0x81,0x83, + 0xD7,0x46,0x08,0x8B,0x5E,0xF2,0x90,0xBC,0xF3,0xC2,0x48,0x13, + 0x48,0x47,0xA4,0x2D,0x6E,0x2F,0x5C,0xF4,0x75,0x11,0xE9,0x3F, + 0x5E,0x2E,0x17,0x41,0x9A,0xC9,0x26,0x48,0xE9,0xDA,0x27,0x28, + 0xBD,0x31,0x9F,0xB3,0x02,0xD6,0x7A,0x3D,0x64,0x4F,0x0F,0x56, + 0x24,0xE5,0x8B,0xC6,0x83,0x35,0x3B,0x0D,0x24,0x3E,0xF4,0x60, + 0x72,0x3A,0xE4,0xD1,0x7F,0x32,0xDC,0x26,0xB7,0x5C,0x1D,0x4D, + 0x60,0x57,0x64,0x26,0xC3,0xC6,0x7B,0xE9,0x02,0xAF,0xDA,0x63, + 0xE9,0x48,0x89,0x30,0xBA,0x70,0xF2,0x42,0xF9,0x77,0x69,0x84, + 0xCE,0x0B,0x72,0x7E,0x86,0xC7,0xC5,0x63,0xC0,0xD7,0x3E,0x9D, + 0x0C,0x88,0x88,0x91,0x66,0x9B,0xD3,0x62,0x16,0xC2,0x46,0x2B, + 0x08,0xBF,0x3B,0xA9,0xAA,0x4C,0xBF,0x2D,0xB5,0xC0,0xC5,0x26, + 0xF6,0xDB,0x83,0xDD,0x42,0x8E,0x57,0x68,0xE7,0x93,0x0E,0x3F, + 0xAB,0x95,0x45,0x03,0x15,0x87,0x02,0x2F,0x18,0xBB,0x71,0xB9, + 0x8E,0x3C,0x67,0xCE,0x63,0x85,0x04,0xE1,0x55,0xA8,0x06,0x30, + 0x52,0x03,0x33,0x4F,0x4A,0x34,0x61,0x0F,0x4F,0xE5,0x93,0xD0, + 0x83,0x33,0x9B,0xF1,0x9A,0x87,0xEC,0x9A,0xC4,0xB5,0x51,0x7B, + 0x2F,0x7D,0xBB,0x95,0x33,0x46,0xF7,0x2D,0xBD,0x90,0x93,0x7A, + 0xA0,0x99,0x24,0xE1,0x5B,0x24,0x2D,0x91,0x9B,0x58,0xA4,0xE1, + 0xF6,0xB2,0x76,0x20,0x1B,0xB7,0x00,0x0C,0x8D,0xF0,0x8C,0x90, + 0x44,0xFF,0x35,0x40,0xFE,0x0F,0xCC,0x34,0x74,0x82,0xCB,0x38, + 0x52,0x09,0x83,0x63, + }; + static unsigned char dh2048_g[]={ + 0x02, + }; + DH *dh; + + if ((dh=DH_new()) == NULL) return(NULL); + dh->p=BN_bin2bn(dh2048_p,sizeof(dh2048_p),NULL); + dh->g=BN_bin2bn(dh2048_g,sizeof(dh2048_g),NULL); + if ((dh->p == NULL) || (dh->g == NULL)) + { DH_free(dh); return(NULL); } + return(dh); + } + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +int main() { + char line[1024]; + int result; + unsigned int term = 0; + FILE *fp = fdopen(0, "r"); + if (fp == NULL) { + return 1; + } + + int found_dh_parameters = 0; + int found_primes = 0; + while (!found_primes) { + fgets(line, 1023, fp); + + if (!found_dh_parameters) { + // Didn't find DH Parameters section header yet + // See if this line is the "DH Parameters line" + char *forward = strchr(line, 'D'); + if (forward == NULL) { + forward = strchr(line, 'd'); + } + if (forward == NULL) { + continue; + } + + // Note: fgets always NULL-terminates its string. + found_dh_parameters = !strncasecmp("DH Parameters:", forward, strlen("DH Parameters")); + continue; + } + + // Otherwise, see if this is the prime/polynomial header. + char *forward = strchr(line, 'P'); + if (forward == NULL) { + forward = strchr(line, 'p'); + } + if (forward == NULL) { + continue; + } + found_primes = strchr(forward, ':') != NULL; + } + + // Print the first part of the C code: + + printf("DH *get_dh2048()\n" + "{\n" + "\tstatic unsigned char dh2048_p[]={"); + + int terms_written = 0; + while (1) { + result = fscanf(fp, " %x : ", &term); + if (result == 0) { + // All done + break; + } + if (term == 0 && terms_written == 0) { + continue; + } + if (terms_written % 15 == 0) { + printf("\n\t\t"); + } + printf("0x%02X,", term); + terms_written += 1; + } + + printf("\n\t};\n" + "\tstatic unsigned char dh2048_g[]={\n" + "\t\t0x02,\n" + "\t};\n" + "\tDH *dh;\n" + "\n" + "\tif ((dh=DH_new()) == NULL) return(NULL);\n" + "\tBIGNUM *p=BN_bin2bn(dh2048_p,sizeof(dh2048_p),NULL);\n" + "\tBIGNUM *g=BN_bin2bn(dh2048_g,sizeof(dh2048_g),NULL);\n" + "\tif ((p == NULL) || (g == NULL))\n" + "\t\t{ DH_free(dh); return(NULL); }\n" + "\tint result = DH_set0_pqg(dh, p, NULL, g);\n" + "\tif (result == 0)" + "\t\t{ DH_free(dh); return(NULL); }\n" + "\treturn(dh);\n" + "}\n"); + return 0; +} |